Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | =head1 NAME |
2 | ||
3 | perldiag - various Perl diagnostics | |
4 | ||
5 | =head1 DESCRIPTION | |
6 | ||
7 | These messages are classified as follows (listed in increasing order of | |
8 | desperation): | |
9 | ||
10 | (W) A warning (optional). | |
d1d15184 | 11 | (D) A deprecation (enabled by default). |
00eb3f2b | 12 | (S) A severe warning (enabled by default). |
a0d0e21e LW |
13 | (F) A fatal error (trappable). |
14 | (P) An internal error you should never see (trappable). | |
54310121 | 15 | (X) A very fatal error (nontrappable). |
cb1a09d0 | 16 | (A) An alien error message (not generated by Perl). |
a0d0e21e | 17 | |
75b44862 | 18 | The majority of messages from the first three classifications above |
64977eb6 | 19 | (W, D & S) can be controlled using the C<warnings> pragma. |
e476b1b5 GS |
20 | |
21 | If a message can be controlled by the C<warnings> pragma, its warning | |
22 | category is included with the classification letter in the description | |
23 | below. | |
24 | ||
25 | Optional warnings are enabled by using the C<warnings> pragma or the B<-w> | |
26 | and B<-W> switches. Warnings may be captured by setting C<$SIG{__WARN__}> | |
27 | to a reference to a routine that will be called on each warning instead | |
28 | of printing it. See L<perlvar>. | |
29 | ||
b7eceb5b | 30 | Severe warnings are always enabled, unless they are explicitly disabled |
e476b1b5 | 31 | with the C<warnings> pragma or the B<-X> switch. |
4438c4b7 | 32 | |
748a9306 | 33 | Trappable errors may be trapped using the eval operator. See |
4438c4b7 JH |
34 | L<perlfunc/eval>. In almost all cases, warnings may be selectively |
35 | disabled or promoted to fatal errors using the C<warnings> pragma. | |
36 | See L<warnings>. | |
a0d0e21e | 37 | |
6df41af2 GS |
38 | The messages are in alphabetical order, without regard to upper or |
39 | lower-case. Some of these messages are generic. Spots that vary are | |
40 | denoted with a %s or other printf-style escape. These escapes are | |
41 | ignored by the alphabetical order, as are all characters other than | |
42 | letters. To look up your message, just ignore anything that is not a | |
43 | letter. | |
a0d0e21e LW |
44 | |
45 | =over 4 | |
46 | ||
6df41af2 | 47 | =item accept() on closed socket %s |
33633739 | 48 | |
be771a83 GS |
49 | (W closed) You tried to do an accept on a closed socket. Did you forget |
50 | to check the return value of your socket() call? See | |
51 | L<perlfunc/accept>. | |
33633739 | 52 | |
6df41af2 | 53 | =item Allocation too large: %lx |
a0d0e21e | 54 | |
6df41af2 | 55 | (X) You can't allocate more than 64K on an MS-DOS machine. |
a0d0e21e | 56 | |
1109a392 | 57 | =item '%c' allowed only after types %s |
ef54e1a4 | 58 | |
1109a392 MHM |
59 | (F) The modifiers '!', '<' and '>' are allowed in pack() or unpack() only |
60 | after certain types. See L<perlfunc/pack>. | |
ef54e1a4 | 61 | |
6df41af2 | 62 | =item Ambiguous call resolved as CORE::%s(), qualify as such or use & |
43192e07 | 63 | |
75b44862 | 64 | (W ambiguous) A subroutine you have declared has the same name as a Perl |
be771a83 GS |
65 | keyword, and you have used the name without qualification for calling |
66 | one or the other. Perl decided to call the builtin because the | |
67 | subroutine is not imported. | |
43192e07 | 68 | |
6df41af2 GS |
69 | To force interpretation as a subroutine call, either put an ampersand |
70 | before the subroutine name, or qualify the name with its package. | |
71 | Alternatively, you can import the subroutine (or pretend that it's | |
72 | imported with the C<use subs> pragma). | |
43192e07 | 73 | |
6df41af2 | 74 | To silently interpret it as the Perl operator, use the C<CORE::> prefix |
496a33f5 | 75 | on the operator (e.g. C<CORE::log($x)>) or declare the subroutine |
be771a83 GS |
76 | to be an object method (see L<perlsub/"Subroutine Attributes"> or |
77 | L<attributes>). | |
43192e07 | 78 | |
c2e66d9e GS |
79 | =item Ambiguous range in transliteration operator |
80 | ||
81 | (F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at | |
82 | all. To include a C<-> character in a transliteration, put it either | |
83 | first or last. (In the past, C<tr/a-z-0//> was synonymous with | |
84 | C<tr/a-y//>, which was probably not what you would have expected.) | |
85 | ||
6df41af2 | 86 | =item Ambiguous use of %s resolved as %s |
43192e07 | 87 | |
6df41af2 GS |
88 | (W ambiguous)(S) You said something that may not be interpreted the way |
89 | you thought. Normally it's pretty easy to disambiguate it by supplying | |
90 | a missing quote, operator, parenthesis pair or declaration. | |
a0d0e21e | 91 | |
d8225693 JM |
92 | =item Ambiguous use of %c resolved as operator %c |
93 | ||
94 | (W ambiguous) C<%>, C<&>, and C<*> are both infix operators (modulus, | |
95 | bitwise and, and multpication), and you said something like C<*foo * | |
96 | foo> that might be interpreted as either of them. We assumed you | |
97 | meant the infix operator, but please try to make it more clear -- in | |
98 | the example given, you might write C<*foo * foo()> if you really meant | |
99 | to multiply a glob by the result of calling a function. | |
100 | ||
1ef43bca JM |
101 | =item Ambiguous use of %c{%s} resolved to %c%s |
102 | ||
103 | (W ambiguous) You wrote something like C<@{foo}>, which might be | |
104 | asking for the variable C<@foo>, or it might be calling a function | |
105 | named foo, and dereferencing it as an array reference. If you wanted | |
106 | the varable, you can just write C<@foo>. If you wanted to call the | |
107 | function, write C<@{foo()}> ... or you could just not have a variable | |
108 | and a function with the same name, and save yourself a lot of trouble. | |
109 | ||
4da60377 JM |
110 | =item Ambiguous use of %c{%s%s} resolved to %c%s%s |
111 | ||
112 | (W ambiguous) You wrote something like C<${foo[2]}>, which might be | |
113 | looking for element number 2 of the array named C<@foo>, in which case | |
114 | please write C<$foo[2]>, or you might have meant to pass an anonymous | |
115 | arrayref to the function named foo, then do a scalar deref on the | |
116 | value it returns. If you meant that, write C<${foo([2])}>. | |
117 | ||
bdac9d71 | 118 | =item Ambiguous use of -%s resolved as -&%s() |
397d0f13 JM |
119 | |
120 | (W ambiguous) You wrote something like C<-foo>, which might be the | |
121 | string C<"-foo"> (outside of C<use strict 'subs'>), or a call to the | |
122 | function C<foo>, negated. If you meant the string, just write | |
123 | C<"-foo">, and please use strict. If you meant the function call, | |
124 | write C<-foo()>. | |
125 | ||
6df41af2 | 126 | =item '|' and '<' may not both be specified on command line |
a0d0e21e | 127 | |
be771a83 GS |
128 | (F) An error peculiar to VMS. Perl does its own command line |
129 | redirection, and found that STDIN was a pipe, and that you also tried to | |
130 | redirect STDIN using '<'. Only one STDIN stream to a customer, please. | |
c9f97d15 | 131 | |
6df41af2 | 132 | =item '|' and '>' may not both be specified on command line |
1028017a | 133 | |
be771a83 GS |
134 | (F) An error peculiar to VMS. Perl does its own command line |
135 | redirection, and thinks you tried to redirect stdout both to a file and | |
136 | into a pipe to another command. You need to choose one or the other, | |
137 | though nothing's stopping you from piping into a program or Perl script | |
138 | which 'splits' output into two streams, such as | |
1028017a | 139 | |
6df41af2 GS |
140 | open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!"; |
141 | while (<STDIN>) { | |
142 | print; | |
143 | print OUT; | |
144 | } | |
145 | close OUT; | |
c9f97d15 | 146 | |
6df41af2 | 147 | =item Applying %s to %s will act on scalar(%s) |
eb6e2d6f | 148 | |
496a33f5 SC |
149 | (W misc) The pattern match (C<//>), substitution (C<s///>), and |
150 | transliteration (C<tr///>) operators work on scalar values. If you apply | |
be771a83 | 151 | one of them to an array or a hash, it will convert the array or hash to |
ac036724 | 152 | a scalar value (the length of an array, or the population info of a |
153 | hash) and then work on that scalar value. This is probably not what | |
be771a83 GS |
154 | you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for |
155 | alternatives. | |
eb6e2d6f | 156 | |
6df41af2 | 157 | =item Args must match #! line |
a0d0e21e | 158 | |
6df41af2 GS |
159 | (F) The setuid emulator requires that the arguments Perl was invoked |
160 | with match the arguments specified on the #! line. Since some systems | |
161 | impose a one-argument limit on the #! line, try combining switches; | |
162 | for example, turn C<-w -U> into C<-wU>. | |
a0d0e21e | 163 | |
6df41af2 | 164 | =item Arg too short for msgsnd |
76cd736e | 165 | |
6df41af2 | 166 | (F) msgsnd() requires a string at least as long as sizeof(long). |
76cd736e | 167 | |
b0fdf69e | 168 | =item %s argument is not a HASH or ARRAY element or a subroutine |
a0d0e21e | 169 | |
cc1c2e42 FC |
170 | (F) The argument to exists() must be a hash or array element or a |
171 | subroutine with an ampersand, such as: | |
a0d0e21e LW |
172 | |
173 | $foo{$bar} | |
cb4f522a | 174 | $ref->{"susie"}[12] |
cc1c2e42 | 175 | &do_something |
a0d0e21e | 176 | |
8ea97a1e | 177 | =item %s argument is not a HASH or ARRAY element or slice |
5f05dabc | 178 | |
06e52bfa FC |
179 | (F) The argument to delete() must be either a hash or array element, |
180 | such as: | |
5f05dabc | 181 | |
182 | $foo{$bar} | |
cb4f522a | 183 | $ref->{"susie"}[12] |
5f05dabc | 184 | |
8ea97a1e | 185 | or a hash or array slice, such as: |
5f05dabc | 186 | |
6df41af2 GS |
187 | @foo[$bar, $baz, $xyzzy] |
188 | @{$ref->[12]}{"susie", "queue"} | |
5315574d | 189 | |
6df41af2 | 190 | =item %s argument is not a subroutine name |
a0d0e21e | 191 | |
6df41af2 | 192 | (F) The argument to exists() for C<exists &sub> must be a subroutine |
be771a83 GS |
193 | name, and not a subroutine call. C<exists &sub()> will generate this |
194 | error. | |
a0d0e21e | 195 | |
f86702cc | 196 | =item Argument "%s" isn't numeric%s |
a0d0e21e | 197 | |
be771a83 GS |
198 | (W numeric) The indicated string was fed as an argument to an operator |
199 | that expected a numeric value instead. If you're fortunate the message | |
200 | will identify which operator was so unfortunate. | |
a0d0e21e | 201 | |
b4581f09 JH |
202 | =item Argument list not closed for PerlIO layer "%s" |
203 | ||
204 | (W layer) When pushing a layer with arguments onto the Perl I/O system you | |
205 | forgot the ) that closes the argument list. (Layers take care of transforming | |
206 | data between external and internal representations.) Perl stopped parsing | |
207 | the layer list at this point and did not attempt to push this layer. | |
208 | If your program didn't explicitly request the failing operation, it may be | |
209 | the result of the value of the environment variable PERLIO. | |
210 | ||
a0d0e21e LW |
211 | =item Array @%s missing the @ in argument %d of %s() |
212 | ||
75b44862 GS |
213 | (D deprecated) Really old Perl let you omit the @ on array names in some |
214 | spots. This is now heavily deprecated. | |
a0d0e21e LW |
215 | |
216 | =item assertion botched: %s | |
217 | ||
218 | (P) The malloc package that comes with Perl had an internal failure. | |
219 | ||
220 | =item Assertion failed: file "%s" | |
221 | ||
222 | (P) A general assertion failed. The file in question must be examined. | |
223 | ||
224 | =item Assignment to both a list and a scalar | |
225 | ||
226 | (F) If you assign to a conditional operator, the 2nd and 3rd arguments | |
227 | must either both be scalars or both be lists. Otherwise Perl won't | |
228 | know which context to supply to the right side. | |
229 | ||
96ebfdd7 RK |
230 | =item A thread exited while %d threads were running |
231 | ||
4447dfc1 | 232 | (W threads)(S) When using threaded Perl, a thread (not necessarily the main |
96ebfdd7 RK |
233 | thread) exited while there were still other threads running. |
234 | Usually it's a good idea to first collect the return values of the | |
235 | created threads by joining them, and only then exit from the main | |
236 | thread. See L<threads>. | |
237 | ||
2393f1b9 | 238 | =item Attempt to access disallowed key '%s' in a restricted hash |
1b1f1335 | 239 | |
49293501 | 240 | (F) The failing code has attempted to get or set a key which is not in |
2393f1b9 | 241 | the current set of allowed keys of a restricted hash. |
49293501 | 242 | |
81689caa HS |
243 | =item Attempt to bless into a reference |
244 | ||
245 | (F) The CLASSNAME argument to the bless() operator is expected to be | |
246 | the name of the package to bless the resulting object into. You've | |
247 | supplied instead a reference to something: perhaps you wrote | |
248 | ||
249 | bless $self, $proto; | |
250 | ||
251 | when you intended | |
252 | ||
253 | bless $self, ref($proto) || $proto; | |
254 | ||
255 | If you actually want to bless into the stringified version | |
256 | of the reference supplied, you need to stringify it yourself, for | |
257 | example by: | |
258 | ||
259 | bless $self, "$proto"; | |
260 | ||
96ebfdd7 RK |
261 | =item Attempt to delete disallowed key '%s' from a restricted hash |
262 | ||
263 | (F) The failing code attempted to delete from a restricted hash a key | |
264 | which is not in its key set. | |
265 | ||
266 | =item Attempt to delete readonly key '%s' from a restricted hash | |
267 | ||
268 | (F) The failing code attempted to delete a key whose value has been | |
269 | declared readonly from a restricted hash. | |
270 | ||
a0d0e21e LW |
271 | =item Attempt to free non-arena SV: 0x%lx |
272 | ||
be771a83 GS |
273 | (P internal) All SV objects are supposed to be allocated from arenas |
274 | that will be garbage collected on exit. An SV was discovered to be | |
275 | outside any of those arenas. | |
a0d0e21e | 276 | |
54310121 | 277 | =item Attempt to free nonexistent shared string |
bbce6d69 | 278 | |
be771a83 GS |
279 | (P internal) Perl maintains a reference counted internal table of |
280 | strings to optimize the storage and access of hash keys and other | |
281 | strings. This indicates someone tried to decrement the reference count | |
282 | of a string that can no longer be found in the table. | |
bbce6d69 | 283 | |
a0d0e21e LW |
284 | =item Attempt to free temp prematurely |
285 | ||
be771a83 GS |
286 | (W debugging) Mortalized values are supposed to be freed by the |
287 | free_tmps() routine. This indicates that something else is freeing the | |
288 | SV before the free_tmps() routine gets a chance, which means that the | |
289 | free_tmps() routine will be freeing an unreferenced scalar when it does | |
290 | try to free it. | |
a0d0e21e LW |
291 | |
292 | =item Attempt to free unreferenced glob pointers | |
293 | ||
e476b1b5 | 294 | (P internal) The reference counts got screwed up on symbol aliases. |
a0d0e21e LW |
295 | |
296 | =item Attempt to free unreferenced scalar | |
297 | ||
be771a83 GS |
298 | (W internal) Perl went to decrement the reference count of a scalar to |
299 | see if it would go to 0, and discovered that it had already gone to 0 | |
300 | earlier, and should have been freed, and in fact, probably was freed. | |
301 | This could indicate that SvREFCNT_dec() was called too many times, or | |
302 | that SvREFCNT_inc() was called too few times, or that the SV was | |
303 | mortalized when it shouldn't have been, or that memory has been | |
304 | corrupted. | |
a0d0e21e | 305 | |
dcdda58d GS |
306 | =item Attempt to join self |
307 | ||
308 | (F) You tried to join a thread from within itself, which is an | |
be771a83 GS |
309 | impossible task. You may be joining the wrong thread, or you may need |
310 | to move the join() to some other thread. | |
dcdda58d | 311 | |
84902520 TB |
312 | =item Attempt to pack pointer to temporary value |
313 | ||
be771a83 GS |
314 | (W pack) You tried to pass a temporary value (like the result of a |
315 | function, or a computed expression) to the "p" pack() template. This | |
316 | means the result contains a pointer to a location that could become | |
317 | invalid anytime, even before the end of the current statement. Use | |
318 | literals or global values as arguments to the "p" pack() template to | |
319 | avoid this warning. | |
84902520 | 320 | |
087b5369 RD |
321 | =item Attempt to reload %s aborted. |
322 | ||
323 | (F) You tried to load a file with C<use> or C<require> that failed to | |
324 | compile once already. Perl will not try to compile this file again | |
325 | unless you delete its entry from %INC. See L<perlfunc/require> and | |
326 | L<perlvar/%INC>. | |
327 | ||
1b20cd17 NC |
328 | =item Attempt to set length of freed array |
329 | ||
330 | (W) You tried to set the length of an array which has been freed. You | |
331 | can do this by storing a reference to the scalar representing the last index | |
332 | of an array and later assigning through that reference. For example | |
333 | ||
334 | $r = do {my @a; \$#a}; | |
335 | $$r = 503 | |
336 | ||
b7a902f4 | 337 | =item Attempt to use reference as lvalue in substr |
338 | ||
be771a83 GS |
339 | (W substr) You supplied a reference as the first argument to substr() |
340 | used as an lvalue, which is pretty strange. Perhaps you forgot to | |
341 | dereference it first. See L<perlfunc/substr>. | |
b7a902f4 | 342 | |
c32124fe NC |
343 | =item Attribute "locked" is deprecated |
344 | ||
345 | (D deprecated) You have used the attributes pragam to modify the "locked" | |
346 | attribute on a code reference. The :locked attribute is obsolete, has had no | |
347 | effect since 5005 threads were removed, and will be removed in the next major | |
348 | release of Perl 5. | |
349 | ||
f1a3ce43 NC |
350 | =item Attribute "unique" is deprecated |
351 | ||
352 | (D deprecated) You have used the attributes pragam to modify the "unique" | |
b7a2910f | 353 | attribute on an array, hash or scalar reference. The :unique attribute has |
259976bd | 354 | had no effect since Perl 5.8.8, and will be removed in the next major |
f1a3ce43 NC |
355 | release of Perl 5. |
356 | ||
fe13d51d | 357 | =item Bad arg length for %s, is %d, should be %d |
a0d0e21e | 358 | |
be771a83 GS |
359 | (F) You passed a buffer of the wrong size to one of msgctl(), semctl() |
360 | or shmctl(). In C parlance, the correct sizes are, respectively, | |
5f05dabc | 361 | S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and |
a0d0e21e LW |
362 | S<sizeof(struct shmid_ds *)>. |
363 | ||
7a95317d GS |
364 | =item Bad evalled substitution pattern |
365 | ||
496a33f5 | 366 | (F) You've used the C</e> switch to evaluate the replacement for a |
7a95317d GS |
367 | substitution, but perl found a syntax error in the code to evaluate, |
368 | most likely an unexpected right brace '}'. | |
369 | ||
a0d0e21e LW |
370 | =item Bad filehandle: %s |
371 | ||
be771a83 GS |
372 | (F) A symbol was passed to something wanting a filehandle, but the |
373 | symbol has no filehandle associated with it. Perhaps you didn't do an | |
374 | open(), or did it in another package. | |
a0d0e21e LW |
375 | |
376 | =item Bad free() ignored | |
377 | ||
be771a83 GS |
378 | (S malloc) An internal routine called free() on something that had never |
379 | been malloc()ed in the first place. Mandatory, but can be disabled by | |
9ea8bc6d | 380 | setting environment variable C<PERL_BADFREE> to 0. |
33c8a3fe | 381 | |
9ea8bc6d | 382 | This message can be seen quite often with DB_File on systems with "hard" |
be771a83 GS |
383 | dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB> |
384 | which is left unnoticed if C<DB> uses I<forgiving> system malloc(). | |
a0d0e21e | 385 | |
aa689395 | 386 | =item Bad hash |
387 | ||
388 | (P) One of the internal hash routines was passed a null HV pointer. | |
389 | ||
6df41af2 GS |
390 | =item Badly placed ()'s |
391 | ||
392 | (A) You've accidentally run your script through B<csh> instead | |
393 | of Perl. Check the #! line, or manually feed your script into | |
394 | Perl yourself. | |
395 | ||
a0d0e21e LW |
396 | =item Bad name after %s:: |
397 | ||
be771a83 GS |
398 | (F) You started to name a symbol by using a package prefix, and then |
399 | didn't finish the symbol. In particular, you can't interpolate outside | |
400 | of quotes, so | |
a0d0e21e LW |
401 | |
402 | $var = 'myvar'; | |
403 | $sym = mypack::$var; | |
404 | ||
405 | is not the same as | |
406 | ||
407 | $var = 'myvar'; | |
408 | $sym = "mypack::$var"; | |
409 | ||
88e1f1a2 JV |
410 | =item Bad plugin affecting keyword '%s' |
411 | ||
412 | (F) An extension using the keyword plugin mechanism violated the | |
413 | plugin API. | |
414 | ||
4ad56ec9 IZ |
415 | =item Bad realloc() ignored |
416 | ||
be771a83 GS |
417 | (S malloc) An internal routine called realloc() on something that had |
418 | never been malloc()ed in the first place. Mandatory, but can be disabled | |
419 | by setting environment variable C<PERL_BADFREE> to 1. | |
4ad56ec9 | 420 | |
a0d0e21e LW |
421 | =item Bad symbol for array |
422 | ||
423 | (P) An internal request asked to add an array entry to something that | |
424 | wasn't a symbol table entry. | |
425 | ||
4df3f177 SP |
426 | =item Bad symbol for dirhandle |
427 | ||
428 | (P) An internal request asked to add a dirhandle entry to something | |
429 | that wasn't a symbol table entry. | |
430 | ||
431 | ||
a0d0e21e LW |
432 | =item Bad symbol for filehandle |
433 | ||
be771a83 GS |
434 | (P) An internal request asked to add a filehandle entry to something |
435 | that wasn't a symbol table entry. | |
a0d0e21e LW |
436 | |
437 | =item Bad symbol for hash | |
438 | ||
439 | (P) An internal request asked to add a hash entry to something that | |
440 | wasn't a symbol table entry. | |
441 | ||
34d09196 GS |
442 | =item Bareword found in conditional |
443 | ||
be771a83 GS |
444 | (W bareword) The compiler found a bareword where it expected a |
445 | conditional, which often indicates that an || or && was parsed as part | |
446 | of the last argument of the previous construct, for example: | |
34d09196 GS |
447 | |
448 | open FOO || die; | |
449 | ||
be771a83 GS |
450 | It may also indicate a misspelled constant that has been interpreted as |
451 | a bareword: | |
34d09196 GS |
452 | |
453 | use constant TYPO => 1; | |
454 | if (TYOP) { print "foo" } | |
455 | ||
456 | The C<strict> pragma is useful in avoiding such errors. | |
457 | ||
6df41af2 GS |
458 | =item Bareword "%s" not allowed while "strict subs" in use |
459 | ||
460 | (F) With "strict subs" in use, a bareword is only allowed as a | |
be771a83 GS |
461 | subroutine identifier, in curly brackets or to the left of the "=>" |
462 | symbol. Perhaps you need to predeclare a subroutine? | |
6df41af2 GS |
463 | |
464 | =item Bareword "%s" refers to nonexistent package | |
465 | ||
be771a83 GS |
466 | (W bareword) You used a qualified bareword of the form C<Foo::>, but the |
467 | compiler saw no other uses of that namespace before that point. Perhaps | |
468 | you need to predeclare a package? | |
6df41af2 | 469 | |
a0d0e21e LW |
470 | =item BEGIN failed--compilation aborted |
471 | ||
be771a83 GS |
472 | (F) An untrapped exception was raised while executing a BEGIN |
473 | subroutine. Compilation stops immediately and the interpreter is | |
474 | exited. | |
a0d0e21e | 475 | |
68dc0745 | 476 | =item BEGIN not safe after errors--compilation aborted |
477 | ||
478 | (F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which | |
be771a83 GS |
479 | implies a C<BEGIN {}>) after one or more compilation errors had already |
480 | occurred. Since the intended environment for the C<BEGIN {}> could not | |
481 | be guaranteed (due to the errors), and since subsequent code likely | |
482 | depends on its correct operation, Perl just gave up. | |
68dc0745 | 483 | |
6df41af2 GS |
484 | =item \1 better written as $1 |
485 | ||
be771a83 GS |
486 | (W syntax) Outside of patterns, backreferences live on as variables. |
487 | The use of backslashes is grandfathered on the right-hand side of a | |
488 | substitution, but stylistically it's better to use the variable form | |
489 | because other Perl programmers will expect it, and it works better if | |
490 | there are more than 9 backreferences. | |
6df41af2 | 491 | |
252aa082 JH |
492 | =item Binary number > 0b11111111111111111111111111111111 non-portable |
493 | ||
e476b1b5 | 494 | (W portable) The binary number you specified is larger than 2**32-1 |
9e24b6e2 JH |
495 | (4294967295) and therefore non-portable between systems. See |
496 | L<perlport> for more on portability concerns. | |
252aa082 | 497 | |
69282e91 | 498 | =item bind() on closed socket %s |
a0d0e21e | 499 | |
be771a83 GS |
500 | (W closed) You tried to do a bind on a closed socket. Did you forget to |
501 | check the return value of your socket() call? See L<perlfunc/bind>. | |
a0d0e21e | 502 | |
c289d2f7 JH |
503 | =item binmode() on closed filehandle %s |
504 | ||
505 | (W unopened) You tried binmode() on a filehandle that was never opened. | |
506 | Check you control flow and number of arguments. | |
507 | ||
c5a0f51a JH |
508 | =item Bit vector size > 32 non-portable |
509 | ||
e476b1b5 | 510 | (W portable) Using bit vector sizes larger than 32 is non-portable. |
c5a0f51a | 511 | |
4633a7c4 LW |
512 | =item Bizarre copy of %s in %s |
513 | ||
be771a83 | 514 | (P) Perl detected an attempt to copy an internal value that is not |
b45f050a | 515 | copyable. |
4633a7c4 | 516 | |
f675dbe5 CB |
517 | =item Buffer overflow in prime_env_iter: %s |
518 | ||
be771a83 GS |
519 | (W internal) A warning peculiar to VMS. While Perl was preparing to |
520 | iterate over %ENV, it encountered a logical name or symbol definition | |
521 | which was too long, so it was truncated to the string shown. | |
f675dbe5 | 522 | |
a0d0e21e LW |
523 | =item Callback called exit |
524 | ||
4929bf7b | 525 | (F) A subroutine invoked from an external package via call_sv() |
a0d0e21e LW |
526 | exited by calling exit. |
527 | ||
6df41af2 | 528 | =item %s() called too early to check prototype |
f675dbe5 | 529 | |
be771a83 GS |
530 | (W prototype) You've called a function that has a prototype before the |
531 | parser saw a definition or declaration for it, and Perl could not check | |
532 | that the call conforms to the prototype. You need to either add an | |
533 | early prototype declaration for the subroutine in question, or move the | |
534 | subroutine definition ahead of the call to get proper prototype | |
535 | checking. Alternatively, if you are certain that you're calling the | |
536 | function correctly, you may put an ampersand before the name to avoid | |
537 | the warning. See L<perlsub>. | |
f675dbe5 | 538 | |
49704364 | 539 | =item Cannot compress integer in pack |
0258719b NC |
540 | |
541 | (F) An argument to pack("w",...) was too large to compress. The BER | |
542 | compressed integer format can only be used with positive integers, and you | |
543 | attempted to compress Infinity or a very large number (> 1e308). | |
544 | See L<perlfunc/pack>. | |
545 | ||
49704364 | 546 | =item Cannot compress negative numbers in pack |
0258719b NC |
547 | |
548 | (F) An argument to pack("w",...) was negative. The BER compressed integer | |
549 | format can only be used with positive integers. See L<perlfunc/pack>. | |
550 | ||
5c1f4d79 NC |
551 | =item Cannot convert a reference to %s to typeglob |
552 | ||
553 | (F) You manipulated Perl's symbol table directly, stored a reference in it, | |
554 | then tried to access that symbol via conventional Perl syntax. The access | |
555 | triggers Perl to autovivify that typeglob, but it there is no legal conversion | |
556 | from that type of reference to a typeglob. | |
557 | ||
ba2fdce6 NC |
558 | =item Cannot copy to %s in %s |
559 | ||
560 | (P) Perl detected an attempt to copy a value to an internal type that cannot | |
561 | be directly assigned not. | |
562 | ||
b5d97229 RGS |
563 | =item Cannot find encoding "%s" |
564 | ||
565 | (S io) You tried to apply an encoding that did not exist to a filehandle, | |
566 | either with open() or binmode(). | |
567 | ||
96ebfdd7 RK |
568 | =item Can only compress unsigned integers in pack |
569 | ||
570 | (F) An argument to pack("w",...) was not an integer. The BER compressed | |
571 | integer format can only be used with positive integers, and you attempted | |
572 | to compress something else. See L<perlfunc/pack>. | |
573 | ||
a0d0e21e LW |
574 | =item Can't bless non-reference value |
575 | ||
576 | (F) Only hard references may be blessed. This is how Perl "enforces" | |
577 | encapsulation of objects. See L<perlobj>. | |
578 | ||
dc57907a RGS |
579 | =item Can't "break" in a loop topicalizer |
580 | ||
0d863452 RH |
581 | (F) You called C<break>, but you're in a C<foreach> block rather than |
582 | a C<given> block. You probably meant to use C<next> or C<last>. | |
583 | ||
584 | =item Can't "break" outside a given block | |
dc57907a | 585 | |
0d863452 RH |
586 | (F) You called C<break>, but you're not inside a C<given> block. |
587 | ||
a0d0e21e LW |
588 | =item Can't call method "%s" in empty package "%s" |
589 | ||
590 | (F) You called a method correctly, and it correctly indicated a package | |
591 | functioning as a class, but that package doesn't have ANYTHING defined | |
592 | in it, let alone methods. See L<perlobj>. | |
593 | ||
6df41af2 GS |
594 | =item Can't call method "%s" on an undefined value |
595 | ||
596 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
597 | object reference or package name contains an undefined value. Something |
598 | like this will reproduce the error: | |
6df41af2 GS |
599 | |
600 | $BADREF = undef; | |
601 | process $BADREF 1,2,3; | |
602 | $BADREF->process(1,2,3); | |
603 | ||
a0d0e21e LW |
604 | =item Can't call method "%s" on unblessed reference |
605 | ||
54310121 | 606 | (F) A method call must know in what package it's supposed to run. It |
be771a83 GS |
607 | ordinarily finds this out from the object reference you supply, but you |
608 | didn't supply an object reference in this case. A reference isn't an | |
609 | object reference until it has been blessed. See L<perlobj>. | |
a0d0e21e LW |
610 | |
611 | =item Can't call method "%s" without a package or object reference | |
612 | ||
613 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
614 | object reference or package name contains an expression that returns a |
615 | defined value which is neither an object reference nor a package name. | |
72b5445b GS |
616 | Something like this will reproduce the error: |
617 | ||
618 | $BADREF = 42; | |
619 | process $BADREF 1,2,3; | |
620 | $BADREF->process(1,2,3); | |
621 | ||
a0d0e21e LW |
622 | =item Can't chdir to %s |
623 | ||
624 | (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory | |
625 | that you can chdir to, possibly because it doesn't exist. | |
626 | ||
0545a864 | 627 | =item Can't check filesystem of script "%s" for nosuid |
104d25b7 | 628 | |
be771a83 GS |
629 | (P) For some reason you can't check the filesystem of the script for |
630 | nosuid. | |
104d25b7 | 631 | |
6df41af2 GS |
632 | =item Can't coerce array into hash |
633 | ||
634 | (F) You used an array where a hash was expected, but the array has no | |
635 | information on how to map from keys to array indices. You can do that | |
636 | only with arrays that have a hash reference at index 0. | |
637 | ||
a0d0e21e LW |
638 | =item Can't coerce %s to integer in %s |
639 | ||
640 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 641 | (typeglobs), can't be forced to stop being what they are. So you can't |
a0d0e21e LW |
642 | say things like: |
643 | ||
644 | *foo += 1; | |
645 | ||
646 | You CAN say | |
647 | ||
648 | $foo = *foo; | |
649 | $foo += 1; | |
650 | ||
651 | but then $foo no longer contains a glob. | |
652 | ||
653 | =item Can't coerce %s to number in %s | |
654 | ||
655 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 656 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e LW |
657 | |
658 | =item Can't coerce %s to string in %s | |
659 | ||
660 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 661 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e | 662 | |
0d863452 | 663 | =item Can't "continue" outside a when block |
dc57907a | 664 | |
0d863452 RH |
665 | (F) You called C<continue>, but you're not inside a C<when> |
666 | or C<default> block. | |
667 | ||
a0d0e21e LW |
668 | =item Can't create pipe mailbox |
669 | ||
be771a83 GS |
670 | (P) An error peculiar to VMS. The process is suffering from exhausted |
671 | quotas or other plumbing problems. | |
a0d0e21e | 672 | |
eb64745e | 673 | =item Can't declare class for non-scalar %s in "%s" |
a0d0e21e | 674 | |
2f7e735d | 675 | (F) Currently, only scalar variables can be declared with a specific |
30c282f6 | 676 | class qualifier in a "my", "our" or "state" declaration. The semantics may be |
2f7e735d | 677 | extended for other types of variables in future. |
eb64745e GS |
678 | |
679 | =item Can't declare %s in "%s" | |
680 | ||
30c282f6 NC |
681 | (F) Only scalar, array, and hash variables may be declared as "my", "our" or |
682 | "state" variables. They must have ordinary identifiers as names. | |
a0d0e21e | 683 | |
6df41af2 GS |
684 | =item Can't do inplace edit: %s is not a regular file |
685 | ||
be771a83 GS |
686 | (S inplace) You tried to use the B<-i> switch on a special file, such as |
687 | a file in /dev, or a FIFO. The file was ignored. | |
6df41af2 | 688 | |
a0d0e21e LW |
689 | =item Can't do inplace edit on %s: %s |
690 | ||
be771a83 GS |
691 | (S inplace) The creation of the new file failed for the indicated |
692 | reason. | |
a0d0e21e | 693 | |
54310121 | 694 | =item Can't do inplace edit without backup |
a0d0e21e | 695 | |
be771a83 GS |
696 | (F) You're on a system such as MS-DOS that gets confused if you try |
697 | reading from a deleted (but still opened) file. You have to say | |
698 | C<-i.bak>, or some such. | |
a0d0e21e | 699 | |
10f9c03d | 700 | =item Can't do inplace edit: %s would not be unique |
a0d0e21e | 701 | |
e476b1b5 | 702 | (S inplace) Your filesystem does not support filenames longer than 14 |
10f9c03d CK |
703 | characters and Perl was unable to create a unique filename during |
704 | inplace editing with the B<-i> switch. The file was ignored. | |
a0d0e21e | 705 | |
7253e4e3 | 706 | =item Can't do {n,m} with n > m in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 707 | |
b45f050a | 708 | (F) Minima must be less than or equal to maxima. If you really want your |
7253e4e3 | 709 | regexp to match something 0 times, just put {0}. The <-- HERE shows in the |
b45f050a | 710 | regular expression about where the problem was discovered. See L<perlre>. |
a0d0e21e | 711 | |
a0d0e21e LW |
712 | =item Can't do waitpid with flags |
713 | ||
be771a83 GS |
714 | (F) This machine doesn't have either waitpid() or wait4(), so only |
715 | waitpid() without flags is emulated. | |
a0d0e21e | 716 | |
a0d0e21e LW |
717 | =item Can't emulate -%s on #! line |
718 | ||
be771a83 GS |
719 | (F) The #! line specifies a switch that doesn't make sense at this |
720 | point. For example, it'd be kind of silly to put a B<-x> on the #! | |
721 | line. | |
a0d0e21e | 722 | |
1109a392 MHM |
723 | =item Can't %s %s-endian %ss on this platform |
724 | ||
725 | (F) Your platform's byte-order is neither big-endian nor little-endian, | |
726 | or it has a very strange pointer size. Packing and unpacking big- or | |
727 | little-endian floating point values and pointers may not be possible. | |
728 | See L<perlfunc/pack>. | |
729 | ||
a0d0e21e LW |
730 | =item Can't exec "%s": %s |
731 | ||
d1be9408 | 732 | (W exec) A system(), exec(), or piped open call could not execute the |
be771a83 GS |
733 | named program for the indicated reason. Typical reasons include: the |
734 | permissions were wrong on the file, the file wasn't found in | |
735 | C<$ENV{PATH}>, the executable in question was compiled for another | |
736 | architecture, or the #! line in a script points to an interpreter that | |
737 | can't be run for similar reasons. (Or maybe your system doesn't support | |
738 | #! at all.) | |
a0d0e21e LW |
739 | |
740 | =item Can't exec %s | |
741 | ||
be771a83 GS |
742 | (F) Perl was trying to execute the indicated program for you because |
743 | that's what the #! line said. If that's not what you wanted, you may | |
744 | need to mention "perl" on the #! line somewhere. | |
a0d0e21e LW |
745 | |
746 | =item Can't execute %s | |
747 | ||
be771a83 GS |
748 | (F) You used the B<-S> switch, but the copies of the script to execute |
749 | found in the PATH did not have correct permissions. | |
2a92aaa0 | 750 | |
6df41af2 | 751 | =item Can't find an opnumber for "%s" |
2a92aaa0 | 752 | |
be771a83 GS |
753 | (F) A string of a form C<CORE::word> was given to prototype(), but there |
754 | is no builtin with the name C<word>. | |
6df41af2 | 755 | |
56ca2fc0 JH |
756 | =item Can't find %s character property "%s" |
757 | ||
758 | (F) You used C<\p{}> or C<\P{}> but the character property by that name | |
e1b711da KW |
759 | could not be found. Maybe you misspelled the name of the property? |
760 | See L<perluniprops/Properties accessible through \p{} and \P{}> | |
761 | for a complete list of available properties. | |
56ca2fc0 | 762 | |
6df41af2 GS |
763 | =item Can't find label %s |
764 | ||
be771a83 GS |
765 | (F) You said to goto a label that isn't mentioned anywhere that it's |
766 | possible for us to go to. See L<perlfunc/goto>. | |
2a92aaa0 GS |
767 | |
768 | =item Can't find %s on PATH | |
769 | ||
be771a83 GS |
770 | (F) You used the B<-S> switch, but the script to execute could not be |
771 | found in the PATH. | |
a0d0e21e | 772 | |
6df41af2 | 773 | =item Can't find %s on PATH, '.' not in PATH |
a0d0e21e | 774 | |
be771a83 GS |
775 | (F) You used the B<-S> switch, but the script to execute could not be |
776 | found in the PATH, or at least not with the correct permissions. The | |
777 | script exists in the current directory, but PATH prohibits running it. | |
a0d0e21e LW |
778 | |
779 | =item Can't find string terminator %s anywhere before EOF | |
780 | ||
be771a83 GS |
781 | (F) Perl strings can stretch over multiple lines. This message means |
782 | that the closing delimiter was omitted. Because bracketed quotes count | |
783 | nesting levels, the following is missing its final parenthesis: | |
a0d0e21e | 784 | |
fb73857a | 785 | print q(The character '(' starts a side comment.); |
786 | ||
be771a83 GS |
787 | If you're getting this error from a here-document, you may have included |
788 | unseen whitespace before or after your closing tag. A good programmer's | |
789 | editor will have a way to help you find these characters. | |
a0d0e21e | 790 | |
660a4616 TS |
791 | =item Can't find Unicode property definition "%s" |
792 | ||
793 | (F) You may have tried to use C<\p> which means a Unicode property (for | |
e1b711da KW |
794 | example C<\p{Lu}> matches all uppercase letters). If you did mean to use a |
795 | Unicode property, see | |
796 | L<perluniprops/Properties accessible through \p{} and \P{}> | |
797 | for a complete list of available properties. | |
660a4616 TS |
798 | If you didn't mean to use a Unicode property, escape the C<\p>, either |
799 | by C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, until | |
800 | possible C<\E>). | |
801 | ||
b3647a36 | 802 | =item Can't fork: %s |
a0d0e21e | 803 | |
be771a83 GS |
804 | (F) A fatal error occurred while trying to fork while opening a |
805 | pipeline. | |
a0d0e21e | 806 | |
b3647a36 SR |
807 | =item Can't fork, trying again in 5 seconds |
808 | ||
c973c02e | 809 | (W pipe) A fork in a piped open failed with EAGAIN and will be retried |
b3647a36 SR |
810 | after five seconds. |
811 | ||
748a9306 LW |
812 | =item Can't get filespec - stale stat buffer? |
813 | ||
be771a83 GS |
814 | (S) A warning peculiar to VMS. This arises because of the difference |
815 | between access checks under VMS and under the Unix model Perl assumes. | |
816 | Under VMS, access checks are done by filename, rather than by bits in | |
817 | the stat buffer, so that ACLs and other protections can be taken into | |
818 | account. Unfortunately, Perl assumes that the stat buffer contains all | |
819 | the necessary information, and passes it, instead of the filespec, to | |
820 | the access checking routine. It will try to retrieve the filespec using | |
821 | the device name and FID present in the stat buffer, but this works only | |
822 | if you haven't made a subsequent call to the CRTL stat() routine, | |
823 | because the device name is overwritten with each call. If this warning | |
824 | appears, the name lookup failed, and the access checking routine gave up | |
825 | and returned FALSE, just to be conservative. (Note: The access checking | |
826 | routine knows about the Perl C<stat> operator and file tests, so you | |
827 | shouldn't ever see this warning in response to a Perl command; it arises | |
828 | only if some internal code takes stat buffers lightly.) | |
748a9306 | 829 | |
a0d0e21e LW |
830 | =item Can't get pipe mailbox device name |
831 | ||
be771a83 GS |
832 | (P) An error peculiar to VMS. After creating a mailbox to act as a |
833 | pipe, Perl can't retrieve its name for later use. | |
a0d0e21e LW |
834 | |
835 | =item Can't get SYSGEN parameter value for MAXBUF | |
836 | ||
748a9306 LW |
837 | (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your |
838 | mailbox buffers to be, and didn't get an answer. | |
a0d0e21e | 839 | |
6df41af2 | 840 | =item Can't "goto" into the middle of a foreach loop |
a0d0e21e | 841 | |
be771a83 GS |
842 | (F) A "goto" statement was executed to jump into the middle of a foreach |
843 | loop. You can't get there from here. See L<perlfunc/goto>. | |
6df41af2 GS |
844 | |
845 | =item Can't "goto" out of a pseudo block | |
846 | ||
be771a83 GS |
847 | (F) A "goto" statement was executed to jump out of what might look like |
848 | a block, except that it isn't a proper block. This usually occurs if | |
849 | you tried to jump out of a sort() block or subroutine, which is a no-no. | |
850 | See L<perlfunc/goto>. | |
a0d0e21e | 851 | |
9850bf21 | 852 | =item Can't goto subroutine from a sort sub (or similar callback) |
cd299c6e | 853 | |
9850bf21 RH |
854 | (F) The "goto subroutine" call can't be used to jump out of the |
855 | comparison sub for a sort(), or from a similar callback (such | |
856 | as the reduce() function in List::Util). | |
857 | ||
c74ace89 | 858 | =item Can't goto subroutine from an eval-%s |
b150fb22 | 859 | |
be771a83 | 860 | (F) The "goto subroutine" call can't be used to jump out of an eval |
c74ace89 | 861 | "string" or block. |
b150fb22 | 862 | |
6df41af2 GS |
863 | =item Can't goto subroutine outside a subroutine |
864 | ||
be771a83 GS |
865 | (F) The deeply magical "goto subroutine" call can only replace one |
866 | subroutine call for another. It can't manufacture one out of whole | |
867 | cloth. In general you should be calling it out of only an AUTOLOAD | |
868 | routine anyway. See L<perlfunc/goto>. | |
6df41af2 | 869 | |
0b5b802d GS |
870 | =item Can't ignore signal CHLD, forcing to default |
871 | ||
be771a83 GS |
872 | (W signal) Perl has detected that it is being run with the SIGCHLD |
873 | signal (sometimes known as SIGCLD) disabled. Since disabling this | |
874 | signal will interfere with proper determination of exit status of child | |
875 | processes, Perl has reset the signal to its default value. This | |
876 | situation typically indicates that the parent program under which Perl | |
877 | may be running (e.g. cron) is being very careless. | |
0b5b802d | 878 | |
e2c0f81f DG |
879 | =item Can't kill a non-numeric process ID |
880 | ||
881 | (F) Process identifiers must be (signed) integers. It is a fatal error to | |
882 | attempt to kill() an undefined, empty-string or otherwise non-numeric | |
883 | process identifier. | |
884 | ||
6df41af2 | 885 | =item Can't "last" outside a loop block |
4633a7c4 | 886 | |
6df41af2 | 887 | (F) A "last" statement was executed to break out of the current block, |
be771a83 GS |
888 | except that there's this itty bitty problem called there isn't a current |
889 | block. Note that an "if" or "else" block doesn't count as a "loopish" | |
890 | block, as doesn't a block given to sort(), map() or grep(). You can | |
891 | usually double the curlies to get the same effect though, because the | |
892 | inner curlies will be considered a block that loops once. See | |
893 | L<perlfunc/last>. | |
4633a7c4 | 894 | |
2c7d6b9c RGS |
895 | =item Can't linearize anonymous symbol table |
896 | ||
897 | (F) Perl tried to calculate the method resolution order (MRO) of a | |
898 | package, but failed because the package stash has no name. | |
899 | ||
b8170e59 JB |
900 | =item Can't load '%s' for module %s |
901 | ||
902 | (F) The module you tried to load failed to load a dynamic extension. This | |
903 | may either mean that you upgraded your version of perl to one that is | |
904 | incompatible with your old dynamic extensions (which is known to happen | |
905 | between major versions of perl), or (more likely) that your dynamic | |
16d98ec5 | 906 | extension was built against an older version of the library that is |
b8170e59 JB |
907 | installed on your system. You may need to rebuild your old dynamic |
908 | extensions. | |
909 | ||
748a9306 LW |
910 | =item Can't localize lexical variable %s |
911 | ||
2ba9eb46 | 912 | (F) You used local on a variable name that was previously declared as a |
30c282f6 | 913 | lexical variable using "my" or "state". This is not allowed. If you want to |
748a9306 LW |
914 | localize a package variable of the same name, qualify it with the |
915 | package name. | |
916 | ||
6df41af2 | 917 | =item Can't localize through a reference |
4727527e | 918 | |
6df41af2 GS |
919 | (F) You said something like C<local $$ref>, which Perl can't currently |
920 | handle, because when it goes to restore the old value of whatever $ref | |
be771a83 | 921 | pointed to after the scope of the local() is finished, it can't be sure |
64977eb6 | 922 | that $ref will still be a reference. |
4727527e | 923 | |
ea071790 | 924 | =item Can't locate %s |
ec889f3a GS |
925 | |
926 | (F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be | |
927 | found. Perl looks for the file in all the locations mentioned in @INC, | |
be771a83 GS |
928 | unless the file name included the full path to the file. Perhaps you |
929 | need to set the PERL5LIB or PERL5OPT environment variable to say where | |
930 | the extra library is, or maybe the script needs to add the library name | |
931 | to @INC. Or maybe you just misspelled the name of the file. See | |
932 | L<perlfunc/require> and L<lib>. | |
a0d0e21e | 933 | |
6df41af2 GS |
934 | =item Can't locate auto/%s.al in @INC |
935 | ||
be771a83 GS |
936 | (F) A function (or method) was called in a package which allows |
937 | autoload, but there is no function to autoload. Most probable causes | |
938 | are a misprint in a function/method name or a failure to C<AutoSplit> | |
939 | the file, say, by doing C<make install>. | |
6df41af2 | 940 | |
b8170e59 JB |
941 | =item Can't locate loadable object for module %s in @INC |
942 | ||
943 | (F) The module you loaded is trying to load an external library, like | |
944 | for example, C<foo.so> or C<bar.dll>, but the L<DynaLoader> module was | |
945 | unable to locate this library. See L<DynaLoader>. | |
946 | ||
a0d0e21e LW |
947 | =item Can't locate object method "%s" via package "%s" |
948 | ||
949 | (F) You called a method correctly, and it correctly indicated a package | |
950 | functioning as a class, but that package doesn't define that particular | |
2ba9eb46 | 951 | method, nor does any of its base classes. See L<perlobj>. |
a0d0e21e LW |
952 | |
953 | =item Can't locate package %s for @%s::ISA | |
954 | ||
be771a83 GS |
955 | (W syntax) The @ISA array contained the name of another package that |
956 | doesn't seem to exist. | |
a0d0e21e | 957 | |
2f7da168 RK |
958 | =item Can't locate PerlIO%s |
959 | ||
960 | (F) You tried to use in open() a PerlIO layer that does not exist, | |
961 | e.g. open(FH, ">:nosuchlayer", "somefile"). | |
962 | ||
3e3baf6d TB |
963 | =item Can't make list assignment to \%ENV on this system |
964 | ||
be771a83 GS |
965 | (F) List assignment to %ENV is not supported on some systems, notably |
966 | VMS. | |
3e3baf6d | 967 | |
a0d0e21e LW |
968 | =item Can't modify %s in %s |
969 | ||
be771a83 GS |
970 | (F) You aren't allowed to assign to the item indicated, or otherwise try |
971 | to change it, such as with an auto-increment. | |
a0d0e21e | 972 | |
54310121 | 973 | =item Can't modify nonexistent substring |
a0d0e21e LW |
974 | |
975 | (P) The internal routine that does assignment to a substr() was handed | |
976 | a NULL. | |
977 | ||
6df41af2 GS |
978 | =item Can't modify non-lvalue subroutine call |
979 | ||
980 | (F) Subroutines meant to be used in lvalue context should be declared as | |
981 | such, see L<perlsub/"Lvalue subroutines">. | |
982 | ||
5f05dabc | 983 | =item Can't msgrcv to read-only var |
a0d0e21e | 984 | |
5f05dabc | 985 | (F) The target of a msgrcv must be modifiable to be used as a receive |
a0d0e21e LW |
986 | buffer. |
987 | ||
6df41af2 GS |
988 | =item Can't "next" outside a loop block |
989 | ||
990 | (F) A "next" statement was executed to reiterate the current block, but | |
991 | there isn't a current block. Note that an "if" or "else" block doesn't | |
be771a83 GS |
992 | count as a "loopish" block, as doesn't a block given to sort(), map() or |
993 | grep(). You can usually double the curlies to get the same effect | |
994 | though, because the inner curlies will be considered a block that loops | |
995 | once. See L<perlfunc/next>. | |
6df41af2 | 996 | |
a0d0e21e LW |
997 | =item Can't open %s: %s |
998 | ||
c47ff5f1 | 999 | (S inplace) The implicit opening of a file through use of the C<< <> >> |
08e9d68e DD |
1000 | filehandle, either implicitly under the C<-n> or C<-p> command-line |
1001 | switches, or explicitly, failed for the indicated reason. Usually this | |
be771a83 GS |
1002 | is because you don't have read permission for a file which you named on |
1003 | the command line. | |
a0d0e21e | 1004 | |
9a869a14 RGS |
1005 | =item Can't open a reference |
1006 | ||
1007 | (W io) You tried to open a scalar reference for reading or writing, | |
1008 | using the 3-arg open() syntax : | |
1009 | ||
1010 | open FH, '>', $ref; | |
1011 | ||
1012 | but your version of perl is compiled without perlio, and this form of | |
1013 | open is not supported. | |
1014 | ||
a0d0e21e LW |
1015 | =item Can't open bidirectional pipe |
1016 | ||
be771a83 GS |
1017 | (W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported. |
1018 | You can try any of several modules in the Perl library to do this, such | |
1019 | as IPC::Open2. Alternately, direct the pipe's output to a file using | |
1020 | ">", and then read it in under a different file handle. | |
a0d0e21e | 1021 | |
748a9306 LW |
1022 | =item Can't open error file %s as stderr |
1023 | ||
be771a83 GS |
1024 | (F) An error peculiar to VMS. Perl does its own command line |
1025 | redirection, and couldn't open the file specified after '2>' or '2>>' on | |
1026 | the command line for writing. | |
748a9306 LW |
1027 | |
1028 | =item Can't open input file %s as stdin | |
1029 | ||
be771a83 GS |
1030 | (F) An error peculiar to VMS. Perl does its own command line |
1031 | redirection, and couldn't open the file specified after '<' on the | |
1032 | command line for reading. | |
748a9306 LW |
1033 | |
1034 | =item Can't open output file %s as stdout | |
1035 | ||
be771a83 GS |
1036 | (F) An error peculiar to VMS. Perl does its own command line |
1037 | redirection, and couldn't open the file specified after '>' or '>>' on | |
1038 | the command line for writing. | |
748a9306 LW |
1039 | |
1040 | =item Can't open output pipe (name: %s) | |
1041 | ||
be771a83 GS |
1042 | (P) An error peculiar to VMS. Perl does its own command line |
1043 | redirection, and couldn't open the pipe into which to send data destined | |
1044 | for stdout. | |
748a9306 | 1045 | |
2b8ca739 | 1046 | =item Can't open perl script%s |
a0d0e21e LW |
1047 | |
1048 | (F) The script you specified can't be opened for the indicated reason. | |
1049 | ||
fa3aa65a JC |
1050 | If you're debugging a script that uses #!, and normally relies on the |
1051 | shell's $PATH search, the -S option causes perl to do that search, so | |
1052 | you don't have to type the path or C<`which $scriptname`>. | |
1053 | ||
6df41af2 GS |
1054 | =item Can't read CRTL environ |
1055 | ||
1056 | (S) A warning peculiar to VMS. Perl tried to read an element of %ENV | |
1057 | from the CRTL's internal environment array and discovered the array was | |
1058 | missing. You need to figure out where your CRTL misplaced its environ | |
be771a83 GS |
1059 | or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not |
1060 | searched. | |
6df41af2 | 1061 | |
6df41af2 GS |
1062 | =item Can't "redo" outside a loop block |
1063 | ||
1064 | (F) A "redo" statement was executed to restart the current block, but | |
1065 | there isn't a current block. Note that an "if" or "else" block doesn't | |
1066 | count as a "loopish" block, as doesn't a block given to sort(), map() | |
1067 | or grep(). You can usually double the curlies to get the same effect | |
1068 | though, because the inner curlies will be considered a block that | |
1069 | loops once. See L<perlfunc/redo>. | |
1070 | ||
64977eb6 | 1071 | =item Can't remove %s: %s, skipping file |
10f9c03d | 1072 | |
be771a83 GS |
1073 | (S inplace) You requested an inplace edit without creating a backup |
1074 | file. Perl was unable to remove the original file to replace it with | |
1075 | the modified file. The file was left unmodified. | |
10f9c03d | 1076 | |
a0d0e21e LW |
1077 | =item Can't rename %s to %s: %s, skipping file |
1078 | ||
e476b1b5 | 1079 | (S inplace) The rename done by the B<-i> switch failed for some reason, |
10f9c03d | 1080 | probably because you don't have write permission to the directory. |
a0d0e21e | 1081 | |
748a9306 LW |
1082 | =item Can't reopen input pipe (name: %s) in binary mode |
1083 | ||
be771a83 GS |
1084 | (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried |
1085 | to reopen it to accept binary data. Alas, it failed. | |
748a9306 | 1086 | |
fe13d51d | 1087 | =item Can't resolve method "%s" overloading "%s" in package "%s" |
6df41af2 | 1088 | |
be771a83 GS |
1089 | (F|P) Error resolving overloading specified by a method name (as opposed |
1090 | to a subroutine reference): no such method callable via the package. If | |
1091 | method name is C<???>, this is an internal error. | |
6df41af2 | 1092 | |
cd06dffe GS |
1093 | =item Can't return %s from lvalue subroutine |
1094 | ||
be771a83 GS |
1095 | (F) Perl detected an attempt to return illegal lvalues (such as |
1096 | temporary or readonly values) from a subroutine used as an lvalue. This | |
1097 | is not allowed. | |
cd06dffe | 1098 | |
96ebfdd7 RK |
1099 | =item Can't return outside a subroutine |
1100 | ||
1101 | (F) The return statement was executed in mainline code, that is, where | |
1102 | there was no subroutine call to return out of. See L<perlsub>. | |
1103 | ||
78f9721b SM |
1104 | =item Can't return %s to lvalue scalar context |
1105 | ||
1106 | (F) You tried to return a complete array or hash from an lvalue subroutine, | |
1107 | but you called the subroutine in a way that made Perl think you meant | |
1108 | to return only one value. You probably meant to write parentheses around | |
1109 | the call to the subroutine, which tell Perl that the call should be in | |
1110 | list context. | |
1111 | ||
a0d0e21e LW |
1112 | =item Can't stat script "%s" |
1113 | ||
be771a83 GS |
1114 | (P) For some reason you can't fstat() the script even though you have it |
1115 | open already. Bizarre. | |
a0d0e21e | 1116 | |
a0d0e21e LW |
1117 | =item Can't take log of %g |
1118 | ||
fb73857a | 1119 | (F) For ordinary real numbers, you can't take the logarithm of a |
1120 | negative number or zero. There's a Math::Complex package that comes | |
be771a83 GS |
1121 | standard with Perl, though, if you really want to do that for the |
1122 | negative numbers. | |
a0d0e21e LW |
1123 | |
1124 | =item Can't take sqrt of %g | |
1125 | ||
1126 | (F) For ordinary real numbers, you can't take the square root of a | |
fb73857a | 1127 | negative number. There's a Math::Complex package that comes standard |
1128 | with Perl, though, if you really want to do that. | |
a0d0e21e LW |
1129 | |
1130 | =item Can't undef active subroutine | |
1131 | ||
1132 | (F) You can't undefine a routine that's currently running. You can, | |
1133 | however, redefine it while it's running, and you can even undef the | |
1134 | redefined subroutine while the old routine is running. Go figure. | |
1135 | ||
1136 | =item Can't unshift | |
1137 | ||
1138 | (F) You tried to unshift an "unreal" array that can't be unshifted, such | |
1139 | as the main Perl stack. | |
1140 | ||
c81225bc | 1141 | =item Can't upgrade %s (%d) to %d |
a0d0e21e | 1142 | |
be771a83 GS |
1143 | (P) The internal sv_upgrade routine adds "members" to an SV, making it |
1144 | into a more specialized kind of SV. The top several SV types are so | |
1145 | specialized, however, that they cannot be interconverted. This message | |
1146 | indicates that such a conversion was attempted. | |
a0d0e21e | 1147 | |
1db89ea5 BS |
1148 | =item Can't use anonymous symbol table for method lookup |
1149 | ||
e27ad1f2 | 1150 | (F) The internal routine that does method lookup was handed a symbol |
1db89ea5 BS |
1151 | table that doesn't have a name. Symbol tables can become anonymous |
1152 | for example by undefining stashes: C<undef %Some::Package::>. | |
1153 | ||
96ebfdd7 RK |
1154 | =item Can't use an undefined value as %s reference |
1155 | ||
1156 | (F) A value used as either a hard reference or a symbolic reference must | |
1157 | be a defined value. This helps to delurk some insidious errors. | |
1158 | ||
6df41af2 GS |
1159 | =item Can't use bareword ("%s") as %s ref while "strict refs" in use |
1160 | ||
be771a83 GS |
1161 | (F) Only hard references are allowed by "strict refs". Symbolic |
1162 | references are disallowed. See L<perlref>. | |
6df41af2 | 1163 | |
90b75b61 | 1164 | =item Can't use %! because Errno.pm is not available |
1d2dff63 GS |
1165 | |
1166 | (F) The first time the %! hash is used, perl automatically loads the | |
1167 | Errno.pm module. The Errno module is expected to tie the %! hash to | |
1168 | provide symbolic names for C<$!> errno values. | |
1169 | ||
1109a392 MHM |
1170 | =item Can't use both '<' and '>' after type '%c' in %s |
1171 | ||
1172 | (F) A type cannot be forced to have both big-endian and little-endian | |
1173 | byte-order at the same time, so this combination of modifiers is not | |
1174 | allowed. See L<perlfunc/pack>. | |
1175 | ||
6df41af2 GS |
1176 | =item Can't use %s for loop variable |
1177 | ||
be771a83 GS |
1178 | (F) Only a simple scalar variable may be used as a loop variable on a |
1179 | foreach. | |
6df41af2 | 1180 | |
aab6a793 | 1181 | =item Can't use global %s in "%s" |
6df41af2 | 1182 | |
be771a83 GS |
1183 | (F) You tried to declare a magical variable as a lexical variable. This |
1184 | is not allowed, because the magic can be tied to only one location | |
1185 | (namely the global variable) and it would be incredibly confusing to | |
1186 | have variables in your program that looked like magical variables but | |
6df41af2 GS |
1187 | weren't. |
1188 | ||
6d3b25aa RGS |
1189 | =item Can't use '%c' in a group with different byte-order in %s |
1190 | ||
1191 | (F) You attempted to force a different byte-order on a type | |
1192 | that is already inside a group with a byte-order modifier. | |
1193 | For example you cannot force little-endianness on a type that | |
1194 | is inside a big-endian group. | |
1195 | ||
c07a80fd | 1196 | =item Can't use "my %s" in sort comparison |
1197 | ||
1198 | (F) The global variables $a and $b are reserved for sort comparisons. | |
c47ff5f1 | 1199 | You mentioned $a or $b in the same line as the <=> or cmp operator, |
c07a80fd | 1200 | and the variable had earlier been declared as a lexical variable. |
1201 | Either qualify the sort variable with the package name, or rename the | |
1202 | lexical variable. | |
1203 | ||
a0d0e21e LW |
1204 | =item Can't use %s ref as %s ref |
1205 | ||
1206 | (F) You've mixed up your reference types. You have to dereference a | |
1207 | reference of the type needed. You can use the ref() function to | |
1208 | test the type of the reference, if need be. | |
1209 | ||
748a9306 | 1210 | =item Can't use string ("%s") as %s ref while "strict refs" in use |
a0d0e21e | 1211 | |
be771a83 GS |
1212 | (F) Only hard references are allowed by "strict refs". Symbolic |
1213 | references are disallowed. See L<perlref>. | |
a0d0e21e | 1214 | |
748a9306 LW |
1215 | =item Can't use subscript on %s |
1216 | ||
1217 | (F) The compiler tried to interpret a bracketed expression as a | |
1218 | subscript. But to the left of the brackets was an expression that | |
209e7cf1 | 1219 | didn't look like a hash or array reference, or anything else subscriptable. |
748a9306 | 1220 | |
6df41af2 GS |
1221 | =item Can't use \%c to mean $%c in expression |
1222 | ||
75b44862 GS |
1223 | (W syntax) In an ordinary expression, backslash is a unary operator that |
1224 | creates a reference to its argument. The use of backslash to indicate a | |
1225 | backreference to a matched substring is valid only as part of a regular | |
be771a83 GS |
1226 | expression pattern. Trying to do this in ordinary Perl code produces a |
1227 | value that prints out looking like SCALAR(0xdecaf). Use the $1 form | |
1228 | instead. | |
6df41af2 | 1229 | |
0d863452 | 1230 | =item Can't use "when" outside a topicalizer |
dc57907a | 1231 | |
0d863452 RH |
1232 | (F) You have used a when() block that is neither inside a C<foreach> |
1233 | loop nor a C<given> block. (Note that this error is issued on exit | |
1234 | from the C<when> block, so you won't get the error if the match fails, | |
1235 | or if you use an explicit C<continue>.) | |
1236 | ||
810b8aa5 GS |
1237 | =item Can't weaken a nonreference |
1238 | ||
1239 | (F) You attempted to weaken something that was not a reference. Only | |
1240 | references can be weakened. | |
1241 | ||
5f05dabc | 1242 | =item Can't x= to read-only value |
a0d0e21e | 1243 | |
be771a83 GS |
1244 | (F) You tried to repeat a constant value (often the undefined value) |
1245 | with an assignment operator, which implies modifying the value itself. | |
a0d0e21e LW |
1246 | Perhaps you need to copy the value to a temporary, and repeat that. |
1247 | ||
4a68bf9d | 1248 | =item Character following "\c" must be ASCII |
f9d13529 KW |
1249 | |
1250 | (F) In C<\cI<X>>, I<X> must be an ASCII character. | |
1251 | ||
f337b084 | 1252 | =item Character in 'C' format wrapped in pack |
ac7cd81a SC |
1253 | |
1254 | (W pack) You said | |
1255 | ||
1256 | pack("C", $x) | |
1257 | ||
1258 | where $x is either less than 0 or more than 255; the C<"C"> format is | |
1259 | only for encoding native operating system characters (ASCII, EBCDIC, | |
1260 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1261 | ||
1262 | pack("C", $x & 255) | |
1263 | ||
1264 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1265 | instead. | |
1266 | ||
f337b084 TH |
1267 | =item Character in 'W' format wrapped in pack |
1268 | ||
1269 | (W pack) You said | |
1270 | ||
1271 | pack("U0W", $x) | |
1272 | ||
1273 | where $x is either less than 0 or more than 255. However, C<U0>-mode expects | |
1274 | all values to fall in the interval [0, 255], so Perl behaved as if you | |
1275 | meant: | |
1276 | ||
1277 | pack("U0W", $x & 255) | |
1278 | ||
1279 | =item Character in 'c' format wrapped in pack | |
ac7cd81a SC |
1280 | |
1281 | (W pack) You said | |
1282 | ||
1283 | pack("c", $x) | |
1284 | ||
1285 | where $x is either less than -128 or more than 127; the C<"c"> format | |
1286 | is only for encoding native operating system characters (ASCII, EBCDIC, | |
1287 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1288 | ||
1289 | pack("c", $x & 255); | |
1290 | ||
1291 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1292 | instead. | |
1293 | ||
f337b084 TH |
1294 | =item Character in '%c' format wrapped in unpack |
1295 | ||
1296 | (W unpack) You tried something like | |
1297 | ||
1298 | unpack("H", "\x{2a1}") | |
1299 | ||
1a147d38 | 1300 | where the format expects to process a byte (a character with a value |
f337b084 TH |
1301 | below 256), but a higher value was provided instead. Perl uses the value |
1302 | modulus 256 instead, as if you had provided: | |
1303 | ||
1304 | unpack("H", "\x{a1}") | |
1305 | ||
1306 | =item Character(s) in '%c' format wrapped in pack | |
1307 | ||
1308 | (W pack) You tried something like | |
1309 | ||
1310 | pack("u", "\x{1f3}b") | |
1311 | ||
1a147d38 YO |
1312 | where the format expects to process a sequence of bytes (character with a |
1313 | value below 256), but some of the characters had a higher value. Perl | |
f337b084 TH |
1314 | uses the character values modulus 256 instead, as if you had provided: |
1315 | ||
1316 | pack("u", "\x{f3}b") | |
1317 | ||
1318 | =item Character(s) in '%c' format wrapped in unpack | |
1319 | ||
1320 | (W unpack) You tried something like | |
1321 | ||
1322 | unpack("s", "\x{1f3}b") | |
1323 | ||
1a147d38 YO |
1324 | where the format expects to process a sequence of bytes (character with a |
1325 | value below 256), but some of the characters had a higher value. Perl | |
f337b084 TH |
1326 | uses the character values modulus 256 instead, as if you had provided: |
1327 | ||
1328 | unpack("s", "\x{f3}b") | |
1329 | ||
96ebfdd7 RK |
1330 | =item close() on unopened filehandle %s |
1331 | ||
1332 | (W unopened) You tried to close a filehandle that was never opened. | |
1333 | ||
abc7ecad SP |
1334 | =item closedir() attempted on invalid dirhandle %s |
1335 | ||
1336 | (W io) The dirhandle you tried to close is either closed or not really | |
1337 | a dirhandle. Check your control flow. | |
1338 | ||
49704364 WL |
1339 | =item Code missing after '/' |
1340 | ||
1341 | (F) You had a (sub-)template that ends with a '/'. There must be another | |
1342 | template code following the slash. See L<perlfunc/pack>. | |
1343 | ||
6df41af2 GS |
1344 | =item %s: Command not found |
1345 | ||
be771a83 GS |
1346 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1347 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 1348 | |
7a2e2cd6 | 1349 | =item Compilation failed in require |
1350 | ||
1351 | (F) Perl could not compile a file specified in a C<require> statement. | |
be771a83 GS |
1352 | Perl uses this generic message when none of the errors that it |
1353 | encountered were severe enough to halt compilation immediately. | |
7a2e2cd6 | 1354 | |
c3464db5 DD |
1355 | =item Complex regular subexpression recursion limit (%d) exceeded |
1356 | ||
be771a83 GS |
1357 | (W regexp) The regular expression engine uses recursion in complex |
1358 | situations where back-tracking is required. Recursion depth is limited | |
1359 | to 32766, or perhaps less in architectures where the stack cannot grow | |
1360 | arbitrarily. ("Simple" and "medium" situations are handled without | |
1361 | recursion and are not subject to a limit.) Try shortening the string | |
1362 | under examination; looping in Perl code (e.g. with C<while>) rather than | |
1363 | in the regular expression engine; or rewriting the regular expression so | |
c2e66d9e | 1364 | that it is simpler or backtracks less. (See L<perlfaq2> for information |
be771a83 | 1365 | on I<Mastering Regular Expressions>.) |
c3464db5 | 1366 | |
38875929 DM |
1367 | =item cond_broadcast() called on unlocked variable |
1368 | ||
1369 | (W threads) Within a thread-enabled program, you tried to call | |
1370 | cond_broadcast() on a variable which wasn't locked. The cond_broadcast() | |
1371 | function is used to wake up another thread that is waiting in a | |
1372 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1373 | has a chance to enter the wait, it is usual for the signaling thread to | |
1374 | first wait for a lock on variable. This lock attempt will only succeed | |
1375 | after the other thread has entered cond_wait() and thus relinquished the | |
1376 | lock. | |
1377 | ||
38875929 DM |
1378 | =item cond_signal() called on unlocked variable |
1379 | ||
1380 | (W threads) Within a thread-enabled program, you tried to call | |
1381 | cond_signal() on a variable which wasn't locked. The cond_signal() | |
1382 | function is used to wake up another thread that is waiting in a | |
1383 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1384 | has a chance to enter the wait, it is usual for the signaling thread to | |
1385 | first wait for a lock on variable. This lock attempt will only succeed | |
1386 | after the other thread has entered cond_wait() and thus relinquished the | |
1387 | lock. | |
1388 | ||
69282e91 | 1389 | =item connect() on closed socket %s |
a0d0e21e | 1390 | |
be771a83 GS |
1391 | (W closed) You tried to do a connect on a closed socket. Did you forget |
1392 | to check the return value of your socket() call? See | |
1393 | L<perlfunc/connect>. | |
a0d0e21e | 1394 | |
41ab332f | 1395 | =item Constant(%s)%s: %s |
6df41af2 | 1396 | |
be771a83 GS |
1397 | (F) The parser found inconsistencies either while attempting to define |
1398 | an overloaded constant, or when trying to find the character name | |
1399 | specified in the C<\N{...}> escape. Perhaps you forgot to load the | |
1400 | corresponding C<overload> or C<charnames> pragma? See L<charnames> and | |
1401 | L<overload>. | |
6df41af2 | 1402 | |
fc8cd66c YO |
1403 | =item Constant(%s)%s: %s in regex; marked by <-- HERE in m/%s/ |
1404 | ||
1a147d38 YO |
1405 | (F) The parser found inconsistencies while attempting to find |
1406 | the character name specified in the C<\N{...}> escape. Perhaps you | |
1407 | forgot to load the corresponding C<charnames> pragma? | |
fc8cd66c YO |
1408 | See L<charnames>. |
1409 | ||
1410 | ||
779c5bc9 GS |
1411 | =item Constant is not %s reference |
1412 | ||
1413 | (F) A constant value (perhaps declared using the C<use constant> pragma) | |
be771a83 GS |
1414 | is being dereferenced, but it amounts to the wrong type of reference. |
1415 | The message indicates the type of reference that was expected. This | |
1416 | usually indicates a syntax error in dereferencing the constant value. | |
779c5bc9 GS |
1417 | See L<perlsub/"Constant Functions"> and L<constant>. |
1418 | ||
4cee8e80 CS |
1419 | =item Constant subroutine %s redefined |
1420 | ||
bb028877 | 1421 | (S) You redefined a subroutine which had previously been |
be771a83 GS |
1422 | eligible for inlining. See L<perlsub/"Constant Functions"> for |
1423 | commentary and workarounds. | |
4cee8e80 | 1424 | |
9607fc9c | 1425 | =item Constant subroutine %s undefined |
1426 | ||
be771a83 GS |
1427 | (W misc) You undefined a subroutine which had previously been eligible |
1428 | for inlining. See L<perlsub/"Constant Functions"> for commentary and | |
1429 | workarounds. | |
9607fc9c | 1430 | |
e7ea3e70 IZ |
1431 | =item Copy method did not return a reference |
1432 | ||
64977eb6 | 1433 | (F) The method which overloads "=" is buggy. See |
13a2d996 | 1434 | L<overload/Copy Constructor>. |
e7ea3e70 | 1435 | |
6798c92b GS |
1436 | =item CORE::%s is not a keyword |
1437 | ||
1438 | (F) The CORE:: namespace is reserved for Perl keywords. | |
1439 | ||
a0d0e21e LW |
1440 | =item corrupted regexp pointers |
1441 | ||
1442 | (P) The regular expression engine got confused by what the regular | |
1443 | expression compiler gave it. | |
1444 | ||
1445 | =item corrupted regexp program | |
1446 | ||
be771a83 GS |
1447 | (P) The regular expression engine got passed a regexp program without a |
1448 | valid magic number. | |
a0d0e21e | 1449 | |
6df41af2 GS |
1450 | =item Corrupt malloc ptr 0x%lx at 0x%lx |
1451 | ||
1452 | (P) The malloc package that comes with Perl had an internal failure. | |
1453 | ||
49704364 WL |
1454 | =item Count after length/code in unpack |
1455 | ||
1456 | (F) You had an unpack template indicating a counted-length string, but | |
1457 | you have also specified an explicit size for the string. See | |
1458 | L<perlfunc/pack>. | |
1459 | ||
1408fb84 | 1460 | =item "\c%c" more clearly written simply as "%s" |
f9d13529 KW |
1461 | |
1462 | (D deprecated) The C<\cI<X>> construct is intended to be a way to specify | |
1463 | non-printable characters. You used it for a printable one, which is better | |
1408fb84 KW |
1464 | written as simply itself, perhaps preceded by a backslash for non-word |
1465 | characters. This message may not remain as Deprecated beyond 5.13. | |
f9d13529 | 1466 | |
a0d0e21e LW |
1467 | =item Deep recursion on subroutine "%s" |
1468 | ||
be771a83 GS |
1469 | (W recursion) This subroutine has called itself (directly or indirectly) |
1470 | 100 times more than it has returned. This probably indicates an | |
1471 | infinite recursion, unless you're writing strange benchmark programs, in | |
1472 | which case it indicates something else. | |
a0d0e21e | 1473 | |
aad1d01f NC |
1474 | This threshold can be changed from 100, by recompiling the F<perl> binary, |
1475 | setting the C pre-processor macro C<PERL_SUB_DEPTH_WARN> to the desired value. | |
1476 | ||
f10b0346 | 1477 | =item defined(@array) is deprecated |
69794302 | 1478 | |
be771a83 GS |
1479 | (D deprecated) defined() is not usually useful on arrays because it |
1480 | checks for an undefined I<scalar> value. If you want to see if the | |
64977eb6 | 1481 | array is empty, just use C<if (@array) { # not empty }> for example. |
69794302 | 1482 | |
f10b0346 | 1483 | =item defined(%hash) is deprecated |
69794302 | 1484 | |
be771a83 GS |
1485 | (D deprecated) defined() is not usually useful on hashes because it |
1486 | checks for an undefined I<scalar> value. If you want to see if the hash | |
64977eb6 | 1487 | is empty, just use C<if (%hash) { # not empty }> for example. |
69794302 | 1488 | |
62658f4d PM |
1489 | =item %s defines neither package nor VERSION--version check failed |
1490 | ||
1491 | (F) You said something like "use Module 42" but in the Module file | |
1492 | there are neither package declarations nor a C<$VERSION>. | |
1493 | ||
fc36a67e | 1494 | =item Delimiter for here document is too long |
1495 | ||
be771a83 GS |
1496 | (F) In a here document construct like C<<<FOO>, the label C<FOO> is too |
1497 | long for Perl to handle. You have to be seriously twisted to write code | |
1498 | that triggers this error. | |
fc36a67e | 1499 | |
4a68bf9d | 1500 | =item Deprecated character in \N{...}; marked by <-- HERE in \N{%s<-- HERE %s |
cb233ae3 KW |
1501 | |
1502 | (D deprecated) Just about anything is legal for the C<...> in C<\N{...}>. | |
1503 | But starting in 5.12, non-reasonable ones that don't look like names are | |
1504 | deprecated. A reasonable name begins with an alphabetic character and | |
1505 | continues with any combination of alphanumerics, dashes, spaces, parentheses or | |
1506 | colons. | |
1507 | ||
6d3b25aa RGS |
1508 | =item Deprecated use of my() in false conditional |
1509 | ||
1510 | (D deprecated) You used a declaration similar to C<my $x if 0>. | |
1511 | There has been a long-standing bug in Perl that causes a lexical variable | |
1512 | not to be cleared at scope exit when its declaration includes a false | |
1513 | conditional. Some people have exploited this bug to achieve a kind of | |
1514 | static variable. Since we intend to fix this bug, we don't want people | |
1515 | relying on this behavior. You can achieve a similar static effect by | |
1516 | declaring the variable in a separate block outside the function, eg | |
36fb85f3 | 1517 | |
6d3b25aa RGS |
1518 | sub f { my $x if 0; return $x++ } |
1519 | ||
1520 | becomes | |
1521 | ||
1522 | { my $x; sub f { return $x++ } } | |
1523 | ||
36fb85f3 RGS |
1524 | Beginning with perl 5.9.4, you can also use C<state> variables to |
1525 | have lexicals that are initialized only once (see L<feature>): | |
1526 | ||
1527 | sub f { state $x; return $x++ } | |
1528 | ||
500ab966 RGS |
1529 | =item DESTROY created new reference to dead object '%s' |
1530 | ||
1531 | (F) A DESTROY() method created a new reference to the object which is | |
1532 | just being DESTROYed. Perl is confused, and prefers to abort rather than | |
1533 | to create a dangling reference. | |
1534 | ||
3cdd684c TP |
1535 | =item Did not produce a valid header |
1536 | ||
1537 | See Server error. | |
1538 | ||
6df41af2 GS |
1539 | =item %s did not return a true value |
1540 | ||
1541 | (F) A required (or used) file must return a true value to indicate that | |
1542 | it compiled correctly and ran its initialization code correctly. It's | |
1543 | traditional to end such a file with a "1;", though any true value would | |
1544 | do. See L<perlfunc/require>. | |
1545 | ||
cc507455 | 1546 | =item (Did you mean &%s instead?) |
4633a7c4 | 1547 | |
413ff9f6 FC |
1548 | (W misc) You probably referred to an imported subroutine &FOO as $FOO or |
1549 | some such. | |
4633a7c4 | 1550 | |
cc507455 | 1551 | =item (Did you mean "local" instead of "our"?) |
33633739 | 1552 | |
be771a83 GS |
1553 | (W misc) Remember that "our" does not localize the declared global |
1554 | variable. You have declared it again in the same lexical scope, which | |
1555 | seems superfluous. | |
33633739 | 1556 | |
cc507455 | 1557 | =item (Did you mean $ or @ instead of %?) |
a0d0e21e | 1558 | |
be771a83 GS |
1559 | (W) You probably said %hash{$key} when you meant $hash{$key} or |
1560 | @hash{@keys}. On the other hand, maybe you just meant %hash and got | |
1561 | carried away. | |
748a9306 | 1562 | |
7e1af8bc | 1563 | =item Died |
5f05dabc | 1564 | |
1565 | (F) You passed die() an empty string (the equivalent of C<die "">) or | |
1566 | you called it with no args and both C<$@> and C<$_> were empty. | |
1567 | ||
3cdd684c TP |
1568 | =item Document contains no data |
1569 | ||
1570 | See Server error. | |
1571 | ||
62658f4d PM |
1572 | =item %s does not define %s::VERSION--version check failed |
1573 | ||
1574 | (F) You said something like "use Module 42" but the Module did not | |
1575 | define a C<$VERSION.> | |
1576 | ||
49704364 WL |
1577 | =item '/' does not take a repeat count |
1578 | ||
1579 | (F) You cannot put a repeat count of any kind right after the '/' code. | |
1580 | See L<perlfunc/pack>. | |
1581 | ||
a0d0e21e LW |
1582 | =item Don't know how to handle magic of type '%s' |
1583 | ||
1584 | (P) The internal handling of magical variables has been cursed. | |
1585 | ||
1586 | =item do_study: out of memory | |
1587 | ||
1588 | (P) This should have been caught by safemalloc() instead. | |
1589 | ||
6df41af2 GS |
1590 | =item (Do you need to predeclare %s?) |
1591 | ||
56da5a46 RGS |
1592 | (S syntax) This is an educated guess made in conjunction with the message |
1593 | "%s found where operator expected". It often means a subroutine or module | |
6df41af2 GS |
1594 | name is being referenced that hasn't been declared yet. This may be |
1595 | because of ordering problems in your file, or because of a missing | |
be771a83 GS |
1596 | "sub", "package", "require", or "use" statement. If you're referencing |
1597 | something that isn't defined yet, you don't actually have to define the | |
1598 | subroutine or package before the current location. You can use an empty | |
1599 | "sub foo;" or "package FOO;" to enter a "forward" declaration. | |
6df41af2 | 1600 | |
ac206dc8 RGS |
1601 | =item dump() better written as CORE::dump() |
1602 | ||
1603 | (W misc) You used the obsolescent C<dump()> built-in function, without fully | |
1604 | qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>. | |
1605 | ||
84d78eb7 YO |
1606 | =item dump is not supported |
1607 | ||
1608 | (F) Your machine doesn't support dump/undump. | |
1609 | ||
a0d0e21e LW |
1610 | =item Duplicate free() ignored |
1611 | ||
be771a83 GS |
1612 | (S malloc) An internal routine called free() on something that had |
1613 | already been freed. | |
a0d0e21e | 1614 | |
1109a392 MHM |
1615 | =item Duplicate modifier '%c' after '%c' in %s |
1616 | ||
1617 | (W) You have applied the same modifier more than once after a type | |
1618 | in a pack template. See L<perlfunc/pack>. | |
1619 | ||
4633a7c4 LW |
1620 | =item elseif should be elsif |
1621 | ||
56da5a46 RGS |
1622 | (S syntax) There is no keyword "elseif" in Perl because Larry thinks it's |
1623 | ugly. Your code will be interpreted as an attempt to call a method named | |
be771a83 | 1624 | "elseif" for the class returned by the following block. This is |
4633a7c4 LW |
1625 | unlikely to be what you want. |
1626 | ||
ab13f0c7 JH |
1627 | =item Empty %s |
1628 | ||
af6f566e HS |
1629 | (F) C<\p> and C<\P> are used to introduce a named Unicode property, as |
1630 | described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in | |
1631 | a regular expression without specifying the property name. | |
ab13f0c7 | 1632 | |
85ab1d1d | 1633 | =item entering effective %s failed |
5ff3f7a4 | 1634 | |
85ab1d1d | 1635 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
1636 | effective uids or gids failed. |
1637 | ||
c038024b RGS |
1638 | =item %ENV is aliased to %s |
1639 | ||
1640 | (F) You're running under taint mode, and the C<%ENV> variable has been | |
1641 | aliased to another hash, so it doesn't reflect anymore the state of the | |
1642 | program's environment. This is potentially insecure. | |
1643 | ||
748a9306 LW |
1644 | =item Error converting file specification %s |
1645 | ||
5f05dabc | 1646 | (F) An error peculiar to VMS. Because Perl may have to deal with file |
748a9306 | 1647 | specifications in either VMS or Unix syntax, it converts them to a |
be771a83 GS |
1648 | single form when it must operate on them directly. Either you've passed |
1649 | an invalid file specification to Perl, or you've found a case the | |
1650 | conversion routines don't handle. Drat. | |
748a9306 | 1651 | |
e4d48cc9 GS |
1652 | =item %s: Eval-group in insecure regular expression |
1653 | ||
be771a83 GS |
1654 | (F) Perl detected tainted data when trying to compile a regular |
1655 | expression that contains the C<(?{ ... })> zero-width assertion, which | |
1656 | is unsafe. See L<perlre/(?{ code })>, and L<perlsec>. | |
e4d48cc9 | 1657 | |
fc8f615e | 1658 | =item %s: Eval-group not allowed at runtime, use re 'eval' |
e4d48cc9 | 1659 | |
be771a83 GS |
1660 | (F) Perl tried to compile a regular expression containing the |
1661 | C<(?{ ... })> zero-width assertion at run time, as it would when the | |
1662 | pattern contains interpolated values. Since that is a security risk, it | |
1663 | is not allowed. If you insist, you may still do this by explicitly | |
1664 | building the pattern from an interpolated string at run time and using | |
1665 | that in an eval(). See L<perlre/(?{ code })>. | |
e4d48cc9 | 1666 | |
6df41af2 GS |
1667 | =item %s: Eval-group not allowed, use re 'eval' |
1668 | ||
be771a83 GS |
1669 | (F) A regular expression contained the C<(?{ ... })> zero-width |
1670 | assertion, but that construct is only allowed when the C<use re 'eval'> | |
1671 | pragma is in effect. See L<perlre/(?{ code })>. | |
6df41af2 | 1672 | |
1a147d38 YO |
1673 | =item EVAL without pos change exceeded limit in regex; marked by <-- HERE in m/%s/ |
1674 | ||
1675 | (F) You used a pattern that nested too many EVAL calls without consuming | |
1676 | any text. Restructure the pattern so that text is consumed. | |
1677 | ||
1678 | The <-- HERE shows in the regular expression about where the problem was | |
1679 | discovered. | |
1680 | ||
fc36a67e | 1681 | =item Excessively long <> operator |
1682 | ||
1683 | (F) The contents of a <> operator may not exceed the maximum size of a | |
1684 | Perl identifier. If you're just trying to glob a long list of | |
1685 | filenames, try using the glob() operator, or put the filenames into a | |
1686 | variable and glob that. | |
1687 | ||
ed9aa3b7 SG |
1688 | =item exec? I'm not *that* kind of operating system |
1689 | ||
1690 | (F) The C<exec> function is not implemented in MacPerl. See L<perlport>. | |
1691 | ||
fe13d51d | 1692 | =item Execution of %s aborted due to compilation errors. |
a0d0e21e LW |
1693 | |
1694 | (F) The final summary message when a Perl compilation fails. | |
1695 | ||
1696 | =item Exiting eval via %s | |
1697 | ||
be771a83 GS |
1698 | (W exiting) You are exiting an eval by unconventional means, such as a |
1699 | goto, or a loop control statement. | |
e476b1b5 GS |
1700 | |
1701 | =item Exiting format via %s | |
1702 | ||
9a2ff54b | 1703 | (W exiting) You are exiting a format by unconventional means, such as a |
be771a83 | 1704 | goto, or a loop control statement. |
a0d0e21e | 1705 | |
0a753a76 | 1706 | =item Exiting pseudo-block via %s |
1707 | ||
be771a83 GS |
1708 | (W exiting) You are exiting a rather special block construct (like a |
1709 | sort block or subroutine) by unconventional means, such as a goto, or a | |
1710 | loop control statement. See L<perlfunc/sort>. | |
0a753a76 | 1711 | |
a0d0e21e LW |
1712 | =item Exiting subroutine via %s |
1713 | ||
be771a83 GS |
1714 | (W exiting) You are exiting a subroutine by unconventional means, such |
1715 | as a goto, or a loop control statement. | |
a0d0e21e LW |
1716 | |
1717 | =item Exiting substitution via %s | |
1718 | ||
be771a83 GS |
1719 | (W exiting) You are exiting a substitution by unconventional means, such |
1720 | as a return, a goto, or a loop control statement. | |
a0d0e21e | 1721 | |
7b8d334a GS |
1722 | =item Explicit blessing to '' (assuming package main) |
1723 | ||
be771a83 GS |
1724 | (W misc) You are blessing a reference to a zero length string. This has |
1725 | the effect of blessing the reference into the package main. This is | |
1726 | usually not what you want. Consider providing a default target package, | |
1727 | e.g. bless($ref, $p || 'MyPackage'); | |
7b8d334a | 1728 | |
6df41af2 GS |
1729 | =item %s: Expression syntax |
1730 | ||
be771a83 GS |
1731 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1732 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 GS |
1733 | |
1734 | =item %s failed--call queue aborted | |
1735 | ||
3c10abe3 AG |
1736 | (F) An untrapped exception was raised while executing a UNITCHECK, |
1737 | CHECK, INIT, or END subroutine. Processing of the remainder of the | |
1738 | queue of such routines has been prematurely ended. | |
6df41af2 | 1739 | |
7253e4e3 | 1740 | =item False [] range "%s" in regex; marked by <-- HERE in m/%s/ |
73b437c8 | 1741 | |
be771a83 | 1742 | (W regexp) A character class range must start and end at a literal |
7253e4e3 RK |
1743 | character, not another character class like C<\d> or C<[:alpha:]>. The "-" |
1744 | in your false range is interpreted as a literal "-". Consider quoting the | |
1745 | "-", "\-". The <-- HERE shows in the regular expression about where the | |
1746 | problem was discovered. See L<perlre>. | |
73b437c8 | 1747 | |
1b1ee2ef | 1748 | =item Fatal VMS error (status=%d) at %s, line %d |
a0d0e21e | 1749 | |
be771a83 GS |
1750 | (P) An error peculiar to VMS. Something untoward happened in a VMS |
1751 | system service or RTL routine; Perl's exit status should provide more | |
1752 | details. The filename in "at %s" and the line number in "line %d" tell | |
1753 | you which section of the Perl source code is distressed. | |
a0d0e21e LW |
1754 | |
1755 | =item fcntl is not implemented | |
1756 | ||
1757 | (F) Your machine apparently doesn't implement fcntl(). What is this, a | |
1758 | PDP-11 or something? | |
1759 | ||
22846ab4 AB |
1760 | =item FETCHSIZE returned a negative value |
1761 | ||
1762 | (F) A tied array claimed to have a negative number of elements, which | |
1763 | is not possible. | |
1764 | ||
f337b084 TH |
1765 | =item Field too wide in 'u' format in pack |
1766 | ||
1767 | (W pack) Each line in an uuencoded string start with a length indicator | |
1768 | which can't encode values above 63. So there is no point in asking for | |
1769 | a line length bigger than that. Perl will behave as if you specified | |
1770 | C<u63> as format. | |
1771 | ||
af8c498a | 1772 | =item Filehandle %s opened only for input |
a0d0e21e | 1773 | |
6c8d78fb HS |
1774 | (W io) You tried to write on a read-only filehandle. If you intended |
1775 | it to be a read-write filehandle, you needed to open it with "+<" or | |
1776 | "+>" or "+>>" instead of with "<" or nothing. If you intended only to | |
1777 | write the file, use ">" or ">>". See L<perlfunc/open>. | |
a0d0e21e | 1778 | |
af8c498a | 1779 | =item Filehandle %s opened only for output |
a0d0e21e | 1780 | |
6c8d78fb HS |
1781 | (W io) You tried to read from a filehandle opened only for writing, If |
1782 | you intended it to be a read/write filehandle, you needed to open it | |
be771a83 GS |
1783 | with "+<" or "+>" or "+>>" instead of with "<" or nothing. If you |
1784 | intended only to read from the file, use "<". See L<perlfunc/open>. | |
6c8d78fb HS |
1785 | Another possibility is that you attempted to open filedescriptor 0 |
1786 | (also known as STDIN) for output (maybe you closed STDIN earlier?). | |
97828cef RGS |
1787 | |
1788 | =item Filehandle %s reopened as %s only for input | |
1789 | ||
1790 | (W io) You opened for reading a filehandle that got the same filehandle id | |
d7f8936a | 1791 | as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR |
97828cef RGS |
1792 | previously. |
1793 | ||
1794 | =item Filehandle STDIN reopened as %s only for output | |
1795 | ||
1796 | (W io) You opened for writing a filehandle that got the same filehandle id | |
d7f8936a | 1797 | as STDIN. This occurred because you closed STDIN previously. |
a0d0e21e LW |
1798 | |
1799 | =item Final $ should be \$ or $name | |
1800 | ||
1801 | (F) You must now decide whether the final $ in a string was meant to be | |
be771a83 GS |
1802 | a literal dollar sign, or was meant to introduce a variable name that |
1803 | happens to be missing. So you have to put either the backslash or the | |
1804 | name. | |
a0d0e21e | 1805 | |
56e90b21 GS |
1806 | =item flock() on closed filehandle %s |
1807 | ||
be771a83 | 1808 | (W closed) The filehandle you're attempting to flock() got itself closed |
c289d2f7 | 1809 | some time before now. Check your control flow. flock() operates on |
be771a83 GS |
1810 | filehandles. Are you attempting to call flock() on a dirhandle by the |
1811 | same name? | |
56e90b21 | 1812 | |
6df41af2 GS |
1813 | =item Format not terminated |
1814 | ||
1815 | (F) A format must be terminated by a line with a solitary dot. Perl got | |
1816 | to the end of your file without finding such a line. | |
1817 | ||
a0d0e21e LW |
1818 | =item Format %s redefined |
1819 | ||
e476b1b5 | 1820 | (W redefine) You redefined a format. To suppress this warning, say |
a0d0e21e LW |
1821 | |
1822 | { | |
271595cc | 1823 | no warnings 'redefine'; |
a0d0e21e LW |
1824 | eval "format NAME =..."; |
1825 | } | |
1826 | ||
a0d0e21e LW |
1827 | =item Found = in conditional, should be == |
1828 | ||
e476b1b5 | 1829 | (W syntax) You said |
a0d0e21e LW |
1830 | |
1831 | if ($foo = 123) | |
1832 | ||
1833 | when you meant | |
1834 | ||
1835 | if ($foo == 123) | |
1836 | ||
1837 | (or something like that). | |
1838 | ||
6df41af2 GS |
1839 | =item %s found where operator expected |
1840 | ||
56da5a46 RGS |
1841 | (S syntax) The Perl lexer knows whether to expect a term or an operator. |
1842 | If it sees what it knows to be a term when it was expecting to see an | |
be771a83 GS |
1843 | operator, it gives you this warning. Usually it indicates that an |
1844 | operator or delimiter was omitted, such as a semicolon. | |
6df41af2 | 1845 | |
a0d0e21e LW |
1846 | =item gdbm store returned %d, errno %d, key "%s" |
1847 | ||
1848 | (S) A warning from the GDBM_File extension that a store failed. | |
1849 | ||
1850 | =item gethostent not implemented | |
1851 | ||
1852 | (F) Your C library apparently doesn't implement gethostent(), probably | |
1853 | because if it did, it'd feel morally obligated to return every hostname | |
1854 | on the Internet. | |
1855 | ||
69282e91 | 1856 | =item get%sname() on closed socket %s |
a0d0e21e | 1857 | |
be771a83 GS |
1858 | (W closed) You tried to get a socket or peer socket name on a closed |
1859 | socket. Did you forget to check the return value of your socket() call? | |
a0d0e21e | 1860 | |
748a9306 LW |
1861 | =item getpwnam returned invalid UIC %#o for user "%s" |
1862 | ||
1863 | (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the | |
1864 | C<getpwnam> operator returned an invalid UIC. | |
1865 | ||
6df41af2 GS |
1866 | =item getsockopt() on closed socket %s |
1867 | ||
be771a83 GS |
1868 | (W closed) You tried to get a socket option on a closed socket. Did you |
1869 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
1870 | L<perlfunc/getsockopt>. |
1871 | ||
1872 | =item Global symbol "%s" requires explicit package name | |
1873 | ||
a4edf47d | 1874 | (F) You've said "use strict" or "use strict vars", which indicates |
30c282f6 | 1875 | that all variables must either be lexically scoped (using "my" or "state"), |
a4edf47d GS |
1876 | declared beforehand using "our", or explicitly qualified to say |
1877 | which package the global variable is in (using "::"). | |
6df41af2 | 1878 | |
e476b1b5 GS |
1879 | =item glob failed (%s) |
1880 | ||
be771a83 GS |
1881 | (W glob) Something went wrong with the external program(s) used for |
1882 | C<glob> and C<< <*.c> >>. Usually, this means that you supplied a | |
1883 | C<glob> pattern that caused the external program to fail and exit with a | |
1884 | nonzero status. If the message indicates that the abnormal exit | |
1885 | resulted in a coredump, this may also mean that your csh (C shell) is | |
1886 | broken. If so, you should change all of the csh-related variables in | |
1887 | config.sh: If you have tcsh, make the variables refer to it as if it | |
1888 | were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all | |
1889 | empty (except that C<d_csh> should be C<'undef'>) so that Perl will | |
1890 | think csh is missing. In either case, after editing config.sh, run | |
75b44862 | 1891 | C<./Configure -S> and rebuild Perl. |
e476b1b5 | 1892 | |
a0d0e21e LW |
1893 | =item Glob not terminated |
1894 | ||
1895 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
be771a83 GS |
1896 | a term, so it's looking for the corresponding right angle bracket, and |
1897 | not finding it. Chances are you left some needed parentheses out | |
1898 | earlier in the line, and you really meant a "less than". | |
a0d0e21e | 1899 | |
8b56d6ff FC |
1900 | =item gmtime(%.0f) too large |
1901 | ||
fc003d4b MS |
1902 | (W overflow) You called C<gmtime> with an number that was larger than |
1903 | it can reliably handle and C<gmtime> probably returned the wrong | |
1904 | date. This warning is also triggered with nan (the special | |
1905 | not-a-number value). | |
1906 | ||
1907 | =item gmtime(%.0f) too small | |
1908 | ||
1909 | (W overflow) You called C<gmtime> with an number that was smaller than | |
1910 | it can reliably handle and C<gmtime> probably returned the wrong | |
1911 | date. This warning is also triggered with nan (the special | |
1912 | not-a-number value). | |
8b56d6ff | 1913 | |
6df41af2 | 1914 | =item Got an error from DosAllocMem |
a0d0e21e | 1915 | |
6df41af2 GS |
1916 | (P) An error peculiar to OS/2. Most probably you're using an obsolete |
1917 | version of Perl, and this should not happen anyway. | |
a0d0e21e LW |
1918 | |
1919 | =item goto must have label | |
1920 | ||
1921 | (F) Unlike with "next" or "last", you're not allowed to goto an | |
1922 | unspecified destination. See L<perlfunc/goto>. | |
1923 | ||
49704364 | 1924 | =item ()-group starts with a count |
18529408 | 1925 | |
49704364 | 1926 | (F) A ()-group started with a count. A count is |
18529408 | 1927 | supposed to follow something: a template character or a ()-group. |
49704364 | 1928 | See L<perlfunc/pack>. |
18529408 | 1929 | |
fe13d51d | 1930 | =item %s had compilation errors. |
6df41af2 GS |
1931 | |
1932 | (F) The final summary message when a C<perl -c> fails. | |
1933 | ||
a0d0e21e LW |
1934 | =item Had to create %s unexpectedly |
1935 | ||
be771a83 GS |
1936 | (S internal) A routine asked for a symbol from a symbol table that ought |
1937 | to have existed already, but for some reason it didn't, and had to be | |
1938 | created on an emergency basis to prevent a core dump. | |
a0d0e21e LW |
1939 | |
1940 | =item Hash %%s missing the % in argument %d of %s() | |
1941 | ||
be771a83 GS |
1942 | (D deprecated) Really old Perl let you omit the % on hash names in some |
1943 | spots. This is now heavily deprecated. | |
a0d0e21e | 1944 | |
6df41af2 GS |
1945 | =item %s has too many errors |
1946 | ||
1947 | (F) The parser has given up trying to parse the program after 10 errors. | |
1948 | Further error messages would likely be uninformative. | |
1949 | ||
e6897b1a KW |
1950 | =item Having no space between pattern and following word is deprecated |
1951 | ||
1952 | (D syntax) | |
1953 | ||
1954 | You had a word that isn't a regex modifier immediately following a pattern | |
1955 | without an intervening space. For example, the two constructs: | |
1956 | ||
1957 | $a =~ m/$foo/sand $bar | |
1958 | $a =~ m/$foo/s and $bar | |
1959 | ||
1960 | both currently mean the same thing, but it is planned to disallow the first form | |
1961 | in Perl 5.16. And, | |
1962 | ||
1963 | $a =~ m/$foo/and $bar | |
1964 | ||
1965 | will be disallowed too. | |
1966 | ||
252aa082 JH |
1967 | =item Hexadecimal number > 0xffffffff non-portable |
1968 | ||
e476b1b5 | 1969 | (W portable) The hexadecimal number you specified is larger than 2**32-1 |
9e24b6e2 JH |
1970 | (4294967295) and therefore non-portable between systems. See |
1971 | L<perlport> for more on portability concerns. | |
252aa082 | 1972 | |
8903cb82 | 1973 | =item Identifier too long |
1974 | ||
1975 | (F) Perl limits identifiers (names for variables, functions, etc.) to | |
fc36a67e | 1976 | about 250 characters for simple names, and somewhat more for compound |
be771a83 GS |
1977 | names (like C<$A::B>). You've exceeded Perl's limits. Future versions |
1978 | of Perl are likely to eliminate these arbitrary limitations. | |
8903cb82 | 1979 | |
c3c41406 | 1980 | =item Ignoring zero length \N{} in character class |
fc8cd66c | 1981 | |
ff3f963a KW |
1982 | (W) Named Unicode character escapes (\N{...}) may return a |
1983 | zero length sequence. When such an escape is used in a character class | |
1a147d38 | 1984 | its behaviour is not well defined. Check that the correct escape has |
fc8cd66c YO |
1985 | been used, and the correct charname handler is in scope. |
1986 | ||
6df41af2 | 1987 | =item Illegal binary digit %s |
f675dbe5 | 1988 | |
6df41af2 | 1989 | (F) You used a digit other than 0 or 1 in a binary number. |
f675dbe5 | 1990 | |
6df41af2 | 1991 | =item Illegal binary digit %s ignored |
a0d0e21e | 1992 | |
be771a83 GS |
1993 | (W digit) You may have tried to use a digit other than 0 or 1 in a |
1994 | binary number. Interpretation of the binary number stopped before the | |
1995 | offending digit. | |
a0d0e21e | 1996 | |
4fdae800 | 1997 | =item Illegal character %s (carriage return) |
1998 | ||
d5898338 | 1999 | (F) Perl normally treats carriage returns in the program text as it |
be771a83 GS |
2000 | would any other whitespace, which means you should never see this error |
2001 | when Perl was built using standard options. For some reason, your | |
2002 | version of Perl appears to have been built without this support. Talk | |
2003 | to your Perl administrator. | |
4fdae800 | 2004 | |
d37a9538 ST |
2005 | =item Illegal character in prototype for %s : %s |
2006 | ||
197afce1 MT |
2007 | (W illegalproto) An illegal character was found in a prototype declaration. |
2008 | Legal characters in prototypes are $, @, %, *, ;, [, ], &, and \. | |
d37a9538 | 2009 | |
904d85c5 RGS |
2010 | =item Illegal declaration of anonymous subroutine |
2011 | ||
2012 | (F) When using the C<sub> keyword to construct an anonymous subroutine, | |
2013 | you must always specify a block of code. See L<perlsub>. | |
2014 | ||
8e742a20 MHM |
2015 | =item Illegal declaration of subroutine %s |
2016 | ||
2017 | (F) A subroutine was not declared correctly. See L<perlsub>. | |
2018 | ||
a0d0e21e LW |
2019 | =item Illegal division by zero |
2020 | ||
be771a83 GS |
2021 | (F) You tried to divide a number by 0. Either something was wrong in |
2022 | your logic, or you need to put a conditional in to guard against | |
2023 | meaningless input. | |
a0d0e21e | 2024 | |
6df41af2 GS |
2025 | =item Illegal hexadecimal digit %s ignored |
2026 | ||
be771a83 GS |
2027 | (W digit) You may have tried to use a character other than 0 - 9 or |
2028 | A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal | |
2029 | number stopped before the illegal character. | |
6df41af2 | 2030 | |
a0d0e21e LW |
2031 | =item Illegal modulus zero |
2032 | ||
be771a83 GS |
2033 | (F) You tried to divide a number by 0 to get the remainder. Most |
2034 | numbers don't take to this kindly. | |
a0d0e21e | 2035 | |
6df41af2 | 2036 | =item Illegal number of bits in vec |
399388f4 | 2037 | |
6df41af2 GS |
2038 | (F) The number of bits in vec() (the third argument) must be a power of |
2039 | two from 1 to 32 (or 64, if your platform supports that). | |
399388f4 GS |
2040 | |
2041 | =item Illegal octal digit %s | |
a0d0e21e | 2042 | |
d1be9408 | 2043 | (F) You used an 8 or 9 in an octal number. |
a0d0e21e | 2044 | |
399388f4 | 2045 | =item Illegal octal digit %s ignored |
748a9306 | 2046 | |
d1be9408 | 2047 | (W digit) You may have tried to use an 8 or 9 in an octal number. |
75b44862 | 2048 | Interpretation of the octal number stopped before the 8 or 9. |
748a9306 | 2049 | |
fe13d51d | 2050 | =item Illegal switch in PERL5OPT: -%c |
6ff81951 | 2051 | |
6df41af2 | 2052 | (X) The PERL5OPT environment variable may only be used to set the |
646ca9b2 | 2053 | following switches: B<-[CDIMUdmtw]>. |
6ff81951 | 2054 | |
6df41af2 | 2055 | =item Ill-formed CRTL environ value "%s" |
81e118e0 | 2056 | |
75b44862 | 2057 | (W internal) A warning peculiar to VMS. Perl tried to read the CRTL's |
be771a83 GS |
2058 | internal environ array, and encountered an element without the C<=> |
2059 | delimiter used to separate keys from values. The element is ignored. | |
09bef843 | 2060 | |
6df41af2 | 2061 | =item Ill-formed message in prime_env_iter: |%s| |
54310121 | 2062 | |
be771a83 GS |
2063 | (W internal) A warning peculiar to VMS. Perl tried to read a logical |
2064 | name or CLI symbol definition when preparing to iterate over %ENV, and | |
2065 | didn't see the expected delimiter between key and value, so the line was | |
2066 | ignored. | |
54310121 | 2067 | |
6df41af2 | 2068 | =item (in cleanup) %s |
9607fc9c | 2069 | |
be771a83 GS |
2070 | (W misc) This prefix usually indicates that a DESTROY() method raised |
2071 | the indicated exception. Since destructors are usually called by the | |
2072 | system at arbitrary points during execution, and often a vast number of | |
2073 | times, the warning is issued only once for any number of failures that | |
2074 | would otherwise result in the same message being repeated. | |
6df41af2 | 2075 | |
be771a83 GS |
2076 | Failure of user callbacks dispatched using the C<G_KEEPERR> flag could |
2077 | also result in this warning. See L<perlcall/G_KEEPERR>. | |
9607fc9c | 2078 | |
2c7d6b9c RGS |
2079 | =item Inconsistent hierarchy during C3 merge of class '%s': merging failed on parent '%s' |
2080 | ||
2081 | (F) The method resolution order (MRO) of the given class is not | |
2082 | C3-consistent, and you have enabled the C3 MRO for this class. See the C3 | |
2083 | documentation in L<mro> for more information. | |
2084 | ||
979699d9 JH |
2085 | =item In EBCDIC the v-string components cannot exceed 2147483647 |
2086 | ||
2087 | (F) An error peculiar to EBCDIC. Internally, v-strings are stored as | |
2088 | Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC | |
2089 | encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF). | |
2090 | ||
1a147d38 YO |
2091 | =item Infinite recursion in regex; marked by <-- HERE in m/%s/ |
2092 | ||
2093 | (F) You used a pattern that references itself without consuming any input | |
2094 | text. You should check the pattern to ensure that recursive patterns | |
2095 | either consume text or fail. | |
2096 | ||
2097 | The <-- HERE shows in the regular expression about where the problem was | |
2098 | discovered. | |
2099 | ||
6dbe9451 NC |
2100 | =item Initialization of state variables in list context currently forbidden |
2101 | ||
2102 | (F) Currently the implementation of "state" only permits the initialization | |
2103 | of scalar variables in scalar context. Re-write C<state ($a) = 42> as | |
2104 | C<state $a = 42> to change from list to scalar context. Constructions such | |
2105 | as C<state (@a) = foo()> will be supported in a future perl release. | |
2106 | ||
a0d0e21e LW |
2107 | =item Insecure dependency in %s |
2108 | ||
8b1a09fc | 2109 | (F) You tried to do something that the tainting mechanism didn't like. |
be771a83 GS |
2110 | The tainting mechanism is turned on when you're running setuid or |
2111 | setgid, or when you specify B<-T> to turn it on explicitly. The | |
2112 | tainting mechanism labels all data that's derived directly or indirectly | |
2113 | from the user, who is considered to be unworthy of your trust. If any | |
2114 | such data is used in a "dangerous" operation, you get this error. See | |
2115 | L<perlsec> for more information. | |
a0d0e21e LW |
2116 | |
2117 | =item Insecure directory in %s | |
2118 | ||
be771a83 GS |
2119 | (F) You can't use system(), exec(), or a piped open in a setuid or |
2120 | setgid script if C<$ENV{PATH}> contains a directory that is writable by | |
df98f984 RGS |
2121 | the world. Also, the PATH must not contain any relative directory. |
2122 | See L<perlsec>. | |
a0d0e21e | 2123 | |
62f468fc | 2124 | =item Insecure $ENV{%s} while running %s |
a0d0e21e LW |
2125 | |
2126 | (F) You can't use system(), exec(), or a piped open in a setuid or | |
62f468fc | 2127 | setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>, |
332d5f78 SR |
2128 | C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data |
2129 | supplied (or potentially supplied) by the user. The script must set | |
2130 | the path to a known value, using trustworthy data. See L<perlsec>. | |
a0d0e21e | 2131 | |
a7ae9550 GS |
2132 | =item Integer overflow in %s number |
2133 | ||
75b44862 | 2134 | (W overflow) The hexadecimal, octal or binary number you have specified |
be771a83 GS |
2135 | either as a literal or as an argument to hex() or oct() is too big for |
2136 | your architecture, and has been converted to a floating point number. | |
2137 | On a 32-bit architecture the largest hexadecimal, octal or binary number | |
9e24b6e2 JH |
2138 | representable without overflow is 0xFFFFFFFF, 037777777777, or |
2139 | 0b11111111111111111111111111111111 respectively. Note that Perl | |
2140 | transparently promotes all numbers to a floating point representation | |
2141 | internally--subject to loss of precision errors in subsequent | |
2142 | operations. | |
bbce6d69 | 2143 | |
2fba7546 GA |
2144 | =item Integer overflow in format string for %s |
2145 | ||
0be96356 AL |
2146 | (F) The indexes and widths specified in the format string of C<printf()> |
2147 | or C<sprintf()> are too large. The numbers must not overflow the size of | |
2fba7546 GA |
2148 | integers for your architecture. |
2149 | ||
46314c13 JP |
2150 | =item Integer overflow in version |
2151 | ||
2152 | (F) Some portion of a version initialization is too large for the | |
2153 | size of integers for your architecture. This is not a warning | |
2154 | because there is no rational reason for a version to try and use a | |
2155 | element larger than typically 2**32. This is usually caused by | |
2156 | trying to use some odd mathematical operation as a version, like | |
2157 | 100/9. | |
2158 | ||
7253e4e3 | 2159 | =item Internal disaster in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
2160 | |
2161 | (P) Something went badly wrong in the regular expression parser. | |
7253e4e3 | 2162 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a JF |
2163 | discovered. |
2164 | ||
748a9306 LW |
2165 | =item Internal inconsistency in tracking vforks |
2166 | ||
be771a83 GS |
2167 | (S) A warning peculiar to VMS. Perl keeps track of the number of times |
2168 | you've called C<fork> and C<exec>, to determine whether the current call | |
2169 | to C<exec> should affect the current script or a subprocess (see | |
2170 | L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so | |
2171 | Perl is making a guess and treating this C<exec> as a request to | |
2172 | terminate the Perl script and execute the specified command. | |
748a9306 | 2173 | |
7253e4e3 | 2174 | =item Internal urp in regex; marked by <-- HERE in m/%s/ |
b45f050a | 2175 | |
7253e4e3 RK |
2176 | (P) Something went badly awry in the regular expression parser. The |
2177 | <-- HERE shows in the regular expression about where the problem was | |
2178 | discovered. | |
a0d0e21e | 2179 | |
6df41af2 GS |
2180 | =item %s (...) interpreted as function |
2181 | ||
75b44862 | 2182 | (W syntax) You've run afoul of the rule that says that any list operator |
be771a83 | 2183 | followed by parentheses turns into a function, with all the list |
64977eb6 | 2184 | operators arguments found inside the parentheses. See |
13a2d996 | 2185 | L<perlop/Terms and List Operators (Leftward)>. |
6df41af2 | 2186 | |
09bef843 SB |
2187 | =item Invalid %s attribute: %s |
2188 | ||
2189 | The indicated attribute for a subroutine or variable was not recognized | |
2190 | by Perl or by a user-supplied handler. See L<attributes>. | |
2191 | ||
2192 | =item Invalid %s attributes: %s | |
2193 | ||
be771a83 GS |
2194 | The indicated attributes for a subroutine or variable were not |
2195 | recognized by Perl or by a user-supplied handler. See L<attributes>. | |
09bef843 | 2196 | |
c635e13b | 2197 | =item Invalid conversion in %s: "%s" |
2198 | ||
be771a83 GS |
2199 | (W printf) Perl does not understand the given format conversion. See |
2200 | L<perlfunc/sprintf>. | |
c635e13b | 2201 | |
9e08bc66 TS |
2202 | =item Invalid escape in the specified encoding in regex; marked by <-- HERE in m/%s/ |
2203 | ||
2204 | (W regexp) The numeric escape (for example C<\xHH>) of value < 256 | |
2205 | didn't correspond to a single character through the conversion | |
2206 | from the encoding specified by the encoding pragma. | |
2207 | The escape was replaced with REPLACEMENT CHARACTER (U+FFFD) instead. | |
2208 | The <-- HERE shows in the regular expression about where the | |
2209 | escape was discovered. | |
2210 | ||
2c7d6b9c RGS |
2211 | =item Invalid mro name: '%s' |
2212 | ||
2213 | (F) You tried to C<mro::set_mro("classname", "foo")> | |
2214 | or C<use mro 'foo'>, where C<foo> is not a valid method resolution order (MRO). | |
2215 | (Currently, the only valid ones are C<dfs> and C<c3>). See L<mro>. | |
2216 | ||
7253e4e3 | 2217 | =item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
2218 | |
2219 | (F) The range specified in a character class had a minimum character | |
7253e4e3 RK |
2220 | greater than the maximum character. One possibility is that you forgot the |
2221 | C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only | |
2222 | up to C<ff>. The <-- HERE shows in the regular expression about where the | |
2223 | problem was discovered. See L<perlre>. | |
6df41af2 | 2224 | |
d1573ac7 | 2225 | =item Invalid range "%s" in transliteration operator |
c2e66d9e GS |
2226 | |
2227 | (F) The range specified in the tr/// or y/// operator had a minimum | |
2228 | character greater than the maximum character. See L<perlop>. | |
2229 | ||
09bef843 SB |
2230 | =item Invalid separator character %s in attribute list |
2231 | ||
0120eecf | 2232 | (F) Something other than a colon or whitespace was seen between the |
be771a83 GS |
2233 | elements of an attribute list. If the previous attribute had a |
2234 | parenthesised parameter list, perhaps that list was terminated too soon. | |
2235 | See L<attributes>. | |
09bef843 | 2236 | |
b4581f09 JH |
2237 | =item Invalid separator character %s in PerlIO layer specification %s |
2238 | ||
2239 | (W layer) When pushing layers onto the Perl I/O system, something other than a | |
2240 | colon or whitespace was seen between the elements of a layer list. | |
2241 | If the previous attribute had a parenthesised parameter list, perhaps that | |
2242 | list was terminated too soon. | |
2243 | ||
2c86d456 DG |
2244 | =item Invalid strict version format (%s) |
2245 | ||
2246 | (F) A version number did not meet the "strict" criteria for versions. | |
2247 | A "strict" version number is a positive decimal number (integer or | |
2248 | decimal-fraction) without exponentiation or else a dotted-decimal | |
2249 | v-string with a leading 'v' character and at least three components. | |
2250 | The parenthesized text indicates which criteria was not met. | |
2251 | See the L<version> module for more details on allowed version formats. | |
2252 | ||
49704364 | 2253 | =item Invalid type '%s' in %s |
96e4d5b1 | 2254 | |
49704364 WL |
2255 | (F) The given character is not a valid pack or unpack type. |
2256 | See L<perlfunc/pack>. | |
2257 | (W) The given character is not a valid pack or unpack type but used to be | |
75b44862 | 2258 | silently ignored. |
96e4d5b1 | 2259 | |
2c86d456 DG |
2260 | =item Invalid version format (%s) |
2261 | ||
2262 | (F) A version number did not meet the "lax" criteria for versions. | |
2263 | A "lax" version number is a positive decimal number (integer or | |
2264 | decimal-fraction) without exponentiation or else a dotted-decimal | |
2265 | v-string. If the v-string has less than three components, it must have a | |
2266 | leading 'v' character. Otherwise, the leading 'v' is optional. Both | |
2267 | decimal and dotted-decimal versions may have a trailing "alpha" | |
2268 | component separated by an underscore character after a fractional or | |
2269 | dotted-decimal component. The parenthesized text indicates which | |
2270 | criteria was not met. See the L<version> module for more details on | |
2271 | allowed version formats. | |
46314c13 | 2272 | |
798ae1b7 DG |
2273 | =item Invalid version object |
2274 | ||
2275 | (F) The internal structure of the version object was invalid. Perhaps | |
2276 | the internals were modified directly in some way or an arbitrary reference | |
2277 | was blessed into the "version" class. | |
2278 | ||
a0d0e21e LW |
2279 | =item ioctl is not implemented |
2280 | ||
2281 | (F) Your machine apparently doesn't implement ioctl(), which is pretty | |
2282 | strange for a machine that supports C. | |
2283 | ||
c289d2f7 JH |
2284 | =item ioctl() on unopened %s |
2285 | ||
2286 | (W unopened) You tried ioctl() on a filehandle that was never opened. | |
2287 | Check you control flow and number of arguments. | |
2288 | ||
fe13d51d | 2289 | =item IO layers (like '%s') unavailable |
363c40c4 SB |
2290 | |
2291 | (F) Your Perl has not been configured to have PerlIO, and therefore | |
2292 | you cannot use IO layers. To have PerlIO Perl must be configured | |
2293 | with 'useperlio'. | |
2294 | ||
80cbd5ad JH |
2295 | =item IO::Socket::atmark not implemented on this architecture |
2296 | ||
2297 | (F) Your machine doesn't implement the sockatmark() functionality, | |
2298 | neither as a system call or an ioctl call (SIOCATMARK). | |
2299 | ||
b4581f09 JH |
2300 | =item $* is no longer supported |
2301 | ||
d1d15184 | 2302 | (D deprecated, syntax) The special variable C<$*>, deprecated in older perls, has |
4fd19576 B |
2303 | been removed as of 5.9.0 and is no longer supported. In previous versions of perl the use of |
2304 | C<$*> enabled or disabled multi-line matching within a string. | |
2305 | ||
2306 | Instead of using C<$*> you should use the C</m> (and maybe C</s>) regexp | |
2307 | modifiers. (In older versions: when C<$*> was set to a true value then all regular | |
2308 | expressions behaved as if they were written using C</m>.) | |
b4581f09 | 2309 | |
8ae1fe26 RGS |
2310 | =item $# is no longer supported |
2311 | ||
d1d15184 | 2312 | (D deprecated, syntax) The special variable C<$#>, deprecated in older perls, has |
8ae1fe26 RGS |
2313 | been removed as of 5.9.3 and is no longer supported. You should use the |
2314 | printf/sprintf functions instead. | |
2315 | ||
6ad11d81 JH |
2316 | =item `%s' is not a code reference |
2317 | ||
04a80ee0 RGS |
2318 | (W overload) The second (fourth, sixth, ...) argument of overload::constant |
2319 | needs to be a code reference. Either an anonymous subroutine, or a reference | |
6ad11d81 JH |
2320 | to a subroutine. |
2321 | ||
2322 | =item `%s' is not an overloadable type | |
2323 | ||
04a80ee0 RGS |
2324 | (W overload) You tried to overload a constant type the overload package is |
2325 | unaware of. | |
6ad11d81 | 2326 | |
a0d0e21e LW |
2327 | =item junk on end of regexp |
2328 | ||
2329 | (P) The regular expression parser is confused. | |
2330 | ||
2331 | =item Label not found for "last %s" | |
2332 | ||
be771a83 GS |
2333 | (F) You named a loop to break out of, but you're not currently in a loop |
2334 | of that name, not even if you count where you were called from. See | |
2335 | L<perlfunc/last>. | |
a0d0e21e LW |
2336 | |
2337 | =item Label not found for "next %s" | |
2338 | ||
2339 | (F) You named a loop to continue, but you're not currently in a loop of | |
2340 | that name, not even if you count where you were called from. See | |
2341 | L<perlfunc/last>. | |
2342 | ||
2343 | =item Label not found for "redo %s" | |
2344 | ||
2345 | (F) You named a loop to restart, but you're not currently in a loop of | |
2346 | that name, not even if you count where you were called from. See | |
2347 | L<perlfunc/last>. | |
2348 | ||
85ab1d1d | 2349 | =item leaving effective %s failed |
5ff3f7a4 | 2350 | |
85ab1d1d | 2351 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
2352 | effective uids or gids failed. |
2353 | ||
49704364 WL |
2354 | =item length/code after end of string in unpack |
2355 | ||
d7f8936a | 2356 | (F) While unpacking, the string buffer was already used up when an unpack |
49704364 WL |
2357 | length/code combination tried to obtain more data. This results in |
2358 | an undefined value for the length. See L<perlfunc/pack>. | |
2359 | ||
f0e67a1d Z |
2360 | =item Lexing code attempted to stuff non-Latin-1 character into Latin-1 input |
2361 | ||
2362 | (F) An extension is attempting to insert text into the current parse | |
2363 | (using L<lex_stuff_pvn_flags|perlapi/lex_stuff_pvn_flags> or similar), but | |
2364 | tried to insert a character that couldn't be part of the current input. | |
2365 | This is an inherent pitfall of the stuffing mechanism, and one of the | |
2366 | reasons to avoid it. Where it is necessary to stuff, stuffing only | |
2367 | plain ASCII is recommended. | |
2368 | ||
2369 | =item Lexing code internal error (%s) | |
2370 | ||
2371 | (F) Lexing code supplied by an extension violated the lexer's API in a | |
2372 | detectable way. | |
2373 | ||
69282e91 | 2374 | =item listen() on closed socket %s |
a0d0e21e | 2375 | |
be771a83 GS |
2376 | (W closed) You tried to do a listen on a closed socket. Did you forget |
2377 | to check the return value of your socket() call? See | |
2378 | L<perlfunc/listen>. | |
a0d0e21e | 2379 | |
8b56d6ff FC |
2380 | =item localtime(%.0f) too large |
2381 | ||
fc003d4b MS |
2382 | (W overflow) You called C<localtime> with an number that was larger |
2383 | than it can reliably handle and C<localtime> probably returned the | |
2384 | wrong date. This warning is also triggered with nan (the special | |
2385 | not-a-number value). | |
2386 | ||
2387 | =item localtime(%.0f) too small | |
2388 | ||
2389 | (W overflow) You called C<localtime> with an number that was smaller | |
2390 | than it can reliably handle and C<localtime> probably returned the | |
2391 | wrong date. This warning is also triggered with nan (the special | |
2392 | not-a-number value). | |
8b56d6ff | 2393 | |
58e23c8d | 2394 | =item Lookbehind longer than %d not implemented in regex m/%s/ |
b45f050a JF |
2395 | |
2396 | (F) There is currently a limit on the length of string which lookbehind can | |
58e23c8d | 2397 | handle. This restriction may be eased in a future release. |
2e50fd82 | 2398 | |
b88df990 NC |
2399 | =item Lost precision when %s %f by 1 |
2400 | ||
2401 | (W) The value you attempted to increment or decrement by one is too large | |
2402 | for the underlying floating point representation to store accurately, | |
2403 | hence the target of C<++> or C<--> is unchanged. Perl issues this warning | |
2404 | because it has already switched from integers to floating point when values | |
2405 | are too large for integers, and now even floating point is insufficient. | |
2406 | You may wish to switch to using L<Math::BigInt> explicitly. | |
2407 | ||
2f7da168 RK |
2408 | =item lstat() on filehandle %s |
2409 | ||
2410 | (W io) You tried to do an lstat on a filehandle. What did you mean | |
2411 | by that? lstat() makes sense only on filenames. (Perl did a fstat() | |
2412 | instead on the filehandle.) | |
2413 | ||
885ef6f5 GG |
2414 | =item lvalue attribute ignored after the subroutine has been defined |
2415 | ||
963d9ce9 | 2416 | (W misc) Making a subroutine an lvalue subroutine after it has been defined |
885ef6f5 GG |
2417 | by declaring the subroutine with a lvalue attribute is not |
2418 | possible. To make the the subroutine a lvalue subroutine add the | |
2419 | lvalue attribute to the definition, or put the the declaration before | |
2420 | the definition. | |
2421 | ||
96ebfdd7 RK |
2422 | =item Lvalue subs returning %s not implemented yet |
2423 | ||
2424 | (F) Due to limitations in the current implementation, array and hash | |
2425 | values cannot be returned in subroutines used in lvalue context. See | |
2426 | L<perlsub/"Lvalue subroutines">. | |
2427 | ||
49704364 WL |
2428 | =item Malformed integer in [] in pack |
2429 | ||
2430 | (F) Between the brackets enclosing a numeric repeat count only digits | |
2431 | are permitted. See L<perlfunc/pack>. | |
2432 | ||
2433 | =item Malformed integer in [] in unpack | |
2434 | ||
2435 | (F) Between the brackets enclosing a numeric repeat count only digits | |
2436 | are permitted. See L<perlfunc/pack>. | |
2437 | ||
6df41af2 GS |
2438 | =item Malformed PERLLIB_PREFIX |
2439 | ||
2440 | (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form | |
2441 | ||
2442 | prefix1;prefix2 | |
2443 | ||
2444 | or | |
6df41af2 GS |
2445 | prefix1 prefix2 |
2446 | ||
be771a83 GS |
2447 | with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of |
2448 | a builtin library search path, prefix2 is substituted. The error may | |
2449 | appear if components are not found, or are too long. See | |
fecfaeb8 | 2450 | "PERLLIB_PREFIX" in L<perlos2>. |
6df41af2 | 2451 | |
2f758a16 ST |
2452 | =item Malformed prototype for %s: %s |
2453 | ||
d37a9538 ST |
2454 | (F) You tried to use a function with a malformed prototype. The |
2455 | syntax of function prototypes is given a brief compile-time check for | |
2456 | obvious errors like invalid characters. A more rigorous check is run | |
2457 | when the function is called. | |
2f758a16 | 2458 | |
ba210ebe JH |
2459 | =item Malformed UTF-8 character (%s) |
2460 | ||
2575c402 JW |
2461 | (S utf8) (F) Perl detected a string that didn't comply with UTF-8 |
2462 | encoding rules, even though it had the UTF8 flag on. | |
ba210ebe | 2463 | |
2575c402 JW |
2464 | One possible cause is that you set the UTF8 flag yourself for data that |
2465 | you thought to be in UTF-8 but it wasn't (it was for example legacy | |
2466 | 8-bit data). To guard against this, you can use Encode::decode_utf8. | |
2467 | ||
2468 | If you use the C<:encoding(UTF-8)> PerlIO layer for input, invalid byte | |
2469 | sequences are handled gracefully, but if you use C<:utf8>, the flag is | |
2470 | set without validating the data, possibly resulting in this error | |
2471 | message. | |
2472 | ||
2473 | See also L<Encode/"Handling Malformed Data">. | |
901b21bf | 2474 | |
dea0fc0b JH |
2475 | =item Malformed UTF-16 surrogate |
2476 | ||
183097aa | 2477 | (F) Perl thought it was reading UTF-16 encoded character data but while |
dea0fc0b JH |
2478 | doing it Perl met a malformed Unicode surrogate. |
2479 | ||
ff3f963a KW |
2480 | =item Malformed UTF-8 returned by \N |
2481 | ||
2482 | (F) The charnames handler returned malformed UTF-8. | |
2483 | ||
f337b084 TH |
2484 | =item Malformed UTF-8 string in pack |
2485 | ||
2486 | (F) You tried to pack something that didn't comply with UTF-8 encoding | |
2487 | rules and perl was unable to guess how to make more progress. | |
2488 | ||
2489 | =item Malformed UTF-8 string in unpack | |
2490 | ||
2491 | (F) You tried to unpack something that didn't comply with UTF-8 encoding | |
2492 | rules and perl was unable to guess how to make more progress. | |
2493 | ||
2494 | =item Malformed UTF-8 string in '%c' format in unpack | |
2495 | ||
2496 | (F) You tried to unpack something that didn't comply with UTF-8 encoding | |
2497 | rules and perl was unable to guess how to make more progress. | |
2498 | ||
fe13d51d | 2499 | =item Maximal count of pending signals (%d) exceeded |
2563cec5 | 2500 | |
fe13d51d | 2501 | (F) Perl aborted due to a too high number of signals pending. This |
2563cec5 IZ |
2502 | usually indicates that your operating system tried to deliver signals |
2503 | too fast (with a very high priority), starving the perl process from | |
2504 | resources it would need to reach a point where it can process signals | |
2505 | safely. (See L<perlipc/"Deferred Signals (Safe Signals)">.) | |
2506 | ||
49704364 | 2507 | =item %s matches null string many times in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
2508 | |
2509 | (W regexp) The pattern you've specified would be an infinite loop if the | |
7253e4e3 RK |
2510 | regular expression engine didn't specifically check for that. The <-- HERE |
2511 | shows in the regular expression about where the problem was discovered. | |
2512 | See L<perlre>. | |
6df41af2 | 2513 | |
25f58aea PN |
2514 | =item "%s" may clash with future reserved word |
2515 | ||
2516 | (W) This warning may be due to running a perl5 script through a perl4 | |
2517 | interpreter, especially if the word that is being warned about is | |
2518 | "use" or "my". | |
2519 | ||
49704364 | 2520 | =item % may not be used in pack |
6df41af2 GS |
2521 | |
2522 | (F) You can't pack a string by supplying a checksum, because the | |
be771a83 GS |
2523 | checksumming process loses information, and you can't go the other way. |
2524 | See L<perlfunc/unpack>. | |
6df41af2 | 2525 | |
a0d0e21e LW |
2526 | =item Method for operation %s not found in package %s during blessing |
2527 | ||
2528 | (F) An attempt was made to specify an entry in an overloading table that | |
e7ea3e70 | 2529 | doesn't resolve to a valid subroutine. See L<overload>. |
a0d0e21e | 2530 | |
3cdd684c TP |
2531 | =item Method %s not permitted |
2532 | ||
2533 | See Server error. | |
2534 | ||
a0d0e21e LW |
2535 | =item Might be a runaway multi-line %s string starting on line %d |
2536 | ||
2537 | (S) An advisory indicating that the previous error may have been caused | |
2538 | by a missing delimiter on a string or pattern, because it eventually | |
2539 | ended earlier on the current line. | |
2540 | ||
2541 | =item Misplaced _ in number | |
2542 | ||
d4ced10d JH |
2543 | (W syntax) An underscore (underbar) in a numeric constant did not |
2544 | separate two digits. | |
a0d0e21e | 2545 | |
7baa4690 HS |
2546 | =item Missing argument in %s |
2547 | ||
2548 | (W uninitialized) A printf-type format required more arguments than were | |
2549 | supplied. | |
2550 | ||
9e81e6a1 RGS |
2551 | =item Missing argument to -%c |
2552 | ||
2553 | (F) The argument to the indicated command line switch must follow | |
2554 | immediately after the switch, without intervening spaces. | |
2555 | ||
ff3f963a | 2556 | =item Missing braces on \N{} |
423cee85 | 2557 | |
4a2d328f | 2558 | (F) Wrong syntax of character name literal C<\N{charname}> within |
c3c41406 KW |
2559 | double-quotish context. This can also happen when there is a space (or |
2560 | comment) between the C<\N> and the C<{> in a regex with the C</x> modifier. | |
2561 | This modifier does not change the requirement that the brace immediately follow | |
2562 | the C<\N>. | |
423cee85 | 2563 | |
f0a2b745 KW |
2564 | =item Missing braces on \o{} |
2565 | ||
2566 | (F) A C<\o> must be followed immediately by a C<{> in double-quotish context. | |
2567 | ||
a0d0e21e LW |
2568 | =item Missing comma after first argument to %s function |
2569 | ||
2570 | (F) While certain functions allow you to specify a filehandle or an | |
2571 | "indirect object" before the argument list, this ain't one of them. | |
2572 | ||
06eaf0bc GS |
2573 | =item Missing command in piped open |
2574 | ||
be771a83 GS |
2575 | (W pipe) You used the C<open(FH, "| command")> or |
2576 | C<open(FH, "command |")> construction, but the command was missing or | |
2577 | blank. | |
06eaf0bc | 2578 | |
961ce445 RGS |
2579 | =item Missing control char name in \c |
2580 | ||
2581 | (F) A double-quoted string ended with "\c", without the required control | |
2582 | character name. | |
2583 | ||
6df41af2 GS |
2584 | =item Missing name in "my sub" |
2585 | ||
be771a83 GS |
2586 | (F) The reserved syntax for lexically scoped subroutines requires that |
2587 | they have a name with which they can be found. | |
6df41af2 GS |
2588 | |
2589 | =item Missing $ on loop variable | |
2590 | ||
be771a83 GS |
2591 | (F) Apparently you've been programming in B<csh> too much. Variables |
2592 | are always mentioned with the $ in Perl, unlike in the shells, where it | |
2593 | can vary from one line to the next. | |
6df41af2 | 2594 | |
cc507455 | 2595 | =item (Missing operator before %s?) |
748a9306 | 2596 | |
56da5a46 RGS |
2597 | (S syntax) This is an educated guess made in conjunction with the message |
2598 | "%s found where operator expected". Often the missing operator is a comma. | |
748a9306 | 2599 | |
ab13f0c7 JH |
2600 | =item Missing right brace on %s |
2601 | ||
ff3f963a KW |
2602 | (F) Missing right brace in C<\x{...}>, C<\p{...}>, C<\P{...}>, or C<\N{...}>. |
2603 | ||
4a68bf9d | 2604 | =item Missing right brace on \N{} or unescaped left brace after \N |
ff3f963a | 2605 | |
0a96133f KW |
2606 | (F) |
2607 | C<\N> has two meanings. | |
2608 | ||
2609 | The traditional one has it followed by a name enclosed | |
2610 | in braces, meaning the character (or sequence of characters) given by that name. | |
ff3f963a | 2611 | Thus C<\N{ASTERISK}> is another way of writing C<*>, valid in both |
0a96133f KW |
2612 | double-quoted strings and regular expression patterns. In patterns, it doesn't |
2613 | have the meaning an unescaped C<*> does. | |
ff3f963a | 2614 | |
0a96133f | 2615 | Starting in Perl 5.12.0, C<\N> also can have an additional meaning (only) in |
c3c41406 KW |
2616 | patterns, namely to match a non-newline character. (This is short for |
2617 | C<[^\n]>, and like C<.> but is not affected by the C</s> regex modifier.) | |
ff3f963a KW |
2618 | |
2619 | This can lead to some ambiguities. When C<\N> is not followed immediately by a | |
c3c41406 | 2620 | left brace, Perl assumes the C<[^\n]> meaning. Also, if |
ff3f963a KW |
2621 | the braces form a valid quantifier such as C<\N{3}> or C<\N{5,}>, Perl assumes |
2622 | that this means to match the given quantity of non-newlines (in these examples, | |
0a96133f | 2623 | 3; and 5 or more, respectively). In all other case, where there is a C<\N{> |
ff3f963a KW |
2624 | and a matching C<}>, Perl assumes that a character name is desired. |
2625 | ||
2626 | However, if there is no matching C<}>, Perl doesn't know if it was mistakenly | |
c3c41406 | 2627 | omitted, or if C<[^\n]{> was desired, and |
0a96133f KW |
2628 | raises this error. If you meant the former, add the right brace; if you meant |
2629 | the latter, escape the brace with a backslash, like so: C<\N\{> | |
ab13f0c7 | 2630 | |
d98d5fff | 2631 | =item Missing right curly or square bracket |
a0d0e21e | 2632 | |
be771a83 GS |
2633 | (F) The lexer counted more opening curly or square brackets than closing |
2634 | ones. As a general rule, you'll find it's missing near the place you | |
2635 | were last editing. | |
a0d0e21e | 2636 | |
6df41af2 GS |
2637 | =item (Missing semicolon on previous line?) |
2638 | ||
56da5a46 RGS |
2639 | (S syntax) This is an educated guess made in conjunction with the message |
2640 | "%s found where operator expected". Don't automatically put a semicolon on | |
6df41af2 GS |
2641 | the previous line just because you saw this message. |
2642 | ||
a0d0e21e LW |
2643 | =item Modification of a read-only value attempted |
2644 | ||
2645 | (F) You tried, directly or indirectly, to change the value of a | |
5f05dabc | 2646 | constant. You didn't, of course, try "2 = 1", because the compiler |
a0d0e21e LW |
2647 | catches that. But an easy way to do the same thing is: |
2648 | ||
2649 | sub mod { $_[0] = 1 } | |
2650 | mod(2); | |
2651 | ||
2652 | Another way is to assign to a substr() that's off the end of the string. | |
2653 | ||
c5674021 |
2654 | Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR> |
2655 | is aliased to a constant in the look I<LIST>: | |
2656 | ||
2657 | $x = 1; | |
2658 | foreach my $n ($x, 2) { | |
2659 | $n *= 2; # modifies the $x, but fails on attempt to modify the 2 | |
64977eb6 | 2660 | } |
c5674021 | 2661 | |
7a4340ed | 2662 | =item Modification of non-creatable array value attempted, %s |
a0d0e21e LW |
2663 | |
2664 | (F) You tried to make an array value spring into existence, and the | |
2665 | subscript was probably negative, even counting from end of the array | |
2666 | backwards. | |
2667 | ||
7a4340ed | 2668 | =item Modification of non-creatable hash value attempted, %s |
a0d0e21e | 2669 | |
be771a83 GS |
2670 | (P) You tried to make a hash value spring into existence, and it |
2671 | couldn't be created for some peculiar reason. | |
a0d0e21e LW |
2672 | |
2673 | =item Module name must be constant | |
2674 | ||
2675 | (F) Only a bare module name is allowed as the first argument to a "use". | |
2676 | ||
be98fb35 | 2677 | =item Module name required with -%c option |
6df41af2 | 2678 | |
be98fb35 GS |
2679 | (F) The C<-M> or C<-m> options say that Perl should load some module, but |
2680 | you omitted the name of the module. Consult L<perlrun> for full details | |
2681 | about C<-M> and C<-m>. | |
6df41af2 | 2682 | |
fe13d51d | 2683 | =item More than one argument to '%s' open |
ed9aa3b7 SG |
2684 | |
2685 | (F) The C<open> function has been asked to open multiple files. This | |
2686 | can happen if you are trying to open a pipe to a command that takes a | |
2687 | list of arguments, but have forgotten to specify a piped open mode. | |
2688 | See L<perlfunc/open> for details. | |
2689 | ||
a0d0e21e LW |
2690 | =item msg%s not implemented |
2691 | ||
2692 | (F) You don't have System V message IPC on your system. | |
2693 | ||
2694 | =item Multidimensional syntax %s not supported | |
2695 | ||
75b44862 GS |
2696 | (W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>. |
2697 | They're written like C<$foo[1][2][3]>, as in C. | |
8b1a09fc | 2698 | |
49704364 | 2699 | =item '/' must follow a numeric type in unpack |
6df41af2 | 2700 | |
49704364 WL |
2701 | (F) You had an unpack template that contained a '/', but this did not |
2702 | follow some unpack specification producing a numeric value. | |
2703 | See L<perlfunc/pack>. | |
6df41af2 GS |
2704 | |
2705 | =item "my sub" not yet implemented | |
2706 | ||
be771a83 GS |
2707 | (F) Lexically scoped subroutines are not yet implemented. Don't try |
2708 | that yet. | |
6df41af2 | 2709 | |
30c282f6 | 2710 | =item "%s" variable %s can't be in a package |
6df41af2 | 2711 | |
be771a83 GS |
2712 | (F) Lexically scoped variables aren't in a package, so it doesn't make |
2713 | sense to try to declare one with a package qualifier on the front. Use | |
2714 | local() if you want to localize a package variable. | |
09bef843 | 2715 | |
4a68bf9d | 2716 | =item \N in a character class must be a named character: \N{...} |
ff3f963a | 2717 | |
c3c41406 KW |
2718 | (F) The new (5.12) meaning of C<\N> as C<[^\n]> is not valid in a bracketed |
2719 | character class, for the same reason that C<.> in a character class loses its | |
2720 | specialness: it matches almost everything, which is probably not what you want. | |
2721 | ||
4a68bf9d | 2722 | =item \N{NAME} must be resolved by the lexer |
c3c41406 KW |
2723 | |
2724 | (F) When compiling a regex pattern, an unresolved named character or sequence | |
2725 | was encountered. This can happen in any of several ways that bypass the lexer, | |
b09c05e6 | 2726 | such as using single-quotish context, or an extra backslash in double quotish: |
c3c41406 KW |
2727 | |
2728 | $re = '\N{SPACE}'; # Wrong! | |
b09c05e6 | 2729 | $re = "\\N{SPACE}"; # Wrong! |
c3c41406 KW |
2730 | /$re/; |
2731 | ||
b09c05e6 | 2732 | Instead, use double-quotes with a single backslash: |
c3c41406 KW |
2733 | |
2734 | $re = "\N{SPACE}"; # ok | |
2735 | /$re/; | |
2736 | ||
2737 | The lexer can be bypassed as well by creating the pattern from smaller | |
2738 | components: | |
2739 | ||
2740 | $re = '\N'; | |
2741 | /${re}{SPACE}/; # Wrong! | |
2742 | ||
2743 | It's not a good idea to split a construct in the middle like this, and it | |
2744 | doesn't work here. Instead use the solution above. | |
2745 | ||
2746 | Finally, the message also can happen under the C</x> regex modifier when the | |
2747 | C<\N> is separated by spaces from the C<{>, in which case, remove the spaces. | |
2748 | ||
2749 | /\N {SPACE}/x; # Wrong! | |
2750 | /\N{SPACE}/x; # ok | |
ff3f963a | 2751 | |
8b1a09fc | 2752 | =item Name "%s::%s" used only once: possible typo |
2753 | ||
e476b1b5 | 2754 | (W once) Typographical errors often show up as unique variable names. |
be771a83 GS |
2755 | If you had a good reason for having a unique name, then just mention it |
2756 | again somehow to suppress the message. The C<our> declaration is | |
77ca0c92 | 2757 | provided for this purpose. |
a0d0e21e | 2758 | |
64b374f4 FD |
2759 | NOTE: This warning detects symbols that have been used only once so $c, @c, |
2760 | %c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered | |
2761 | the same; if a program uses $c only once but also uses any of the others it | |
2762 | will not trigger this warning. | |
2763 | ||
4a68bf9d | 2764 | =item Invalid hexadecimal number in \N{U+...} |
ff3f963a KW |
2765 | |
2766 | (F) The character constant represented by C<...> is not a valid hexadecimal | |
c3c41406 KW |
2767 | number. Either it is empty, or you tried to use a character other than 0 - 9 |
2768 | or A - F, a - f in a hexadecimal number. | |
ff3f963a | 2769 | |
49704364 WL |
2770 | =item Negative '/' count in unpack |
2771 | ||
2772 | (F) The length count obtained from a length/code unpack operation was | |
2773 | negative. See L<perlfunc/pack>. | |
2774 | ||
a0d0e21e LW |
2775 | =item Negative length |
2776 | ||
be771a83 GS |
2777 | (F) You tried to do a read/write/send/recv operation with a buffer |
2778 | length that is less than 0. This is difficult to imagine. | |
a0d0e21e | 2779 | |
ed9aa3b7 SG |
2780 | =item Negative offset to vec in lvalue context |
2781 | ||
2782 | (F) When C<vec> is called in an lvalue context, the second argument must be | |
2783 | greater than or equal to zero. | |
2784 | ||
7253e4e3 | 2785 | =item Nested quantifiers in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 2786 | |
b45f050a | 2787 | (F) You can't quantify a quantifier without intervening parentheses. So |
7253e4e3 | 2788 | things like ** or +* or ?* are illegal. The <-- HERE shows in the regular |
b45f050a | 2789 | expression about where the problem was discovered. |
a0d0e21e | 2790 | |
7253e4e3 | 2791 | Note that the minimal matching quantifiers, C<*?>, C<+?>, and |
be771a83 | 2792 | C<??> appear to be nested quantifiers, but aren't. See L<perlre>. |
a0d0e21e | 2793 | |
6df41af2 | 2794 | =item %s never introduced |
a0d0e21e | 2795 | |
be771a83 GS |
2796 | (S internal) The symbol in question was declared but somehow went out of |
2797 | scope before it could possibly have been used. | |
a0d0e21e | 2798 | |
2c7d6b9c RGS |
2799 | =item next::method/next::can/maybe::next::method cannot find enclosing method |
2800 | ||
2801 | (F) C<next::method> needs to be called within the context of a | |
2802 | real method in a real package, and it could not find such a context. | |
2803 | See L<mro>. | |
2804 | ||
a0d0e21e LW |
2805 | =item No %s allowed while running setuid |
2806 | ||
be771a83 GS |
2807 | (F) Certain operations are deemed to be too insecure for a setuid or |
2808 | setgid script to even be allowed to attempt. Generally speaking there | |
2809 | will be another way to do what you want that is, if not secure, at least | |
2810 | securable. See L<perlsec>. | |
a0d0e21e | 2811 | |
a0d0e21e LW |
2812 | =item No comma allowed after %s |
2813 | ||
2814 | (F) A list operator that has a filehandle or "indirect object" is not | |
2815 | allowed to have a comma between that and the following arguments. | |
2816 | Otherwise it'd be just another one of the arguments. | |
2817 | ||
0a753a76 | 2818 | One possible cause for this is that you expected to have imported a |
2819 | constant to your name space with B<use> or B<import> while no such | |
2820 | importing took place, it may for example be that your operating system | |
2821 | does not support that particular constant. Hopefully you did use an | |
2822 | explicit import list for the constants you expect to see, please see | |
2823 | L<perlfunc/use> and L<perlfunc/import>. While an explicit import list | |
2824 | would probably have caught this error earlier it naturally does not | |
2825 | remedy the fact that your operating system still does not support that | |
2826 | constant. Maybe you have a typo in the constants of the symbol import | |
2827 | list of B<use> or B<import> or in the constant name at the line where | |
2828 | this error was triggered? | |
2829 | ||
748a9306 LW |
2830 | =item No command into which to pipe on command line |
2831 | ||
be771a83 GS |
2832 | (F) An error peculiar to VMS. Perl handles its own command line |
2833 | redirection, and found a '|' at the end of the command line, so it | |
2834 | doesn't know where you want to pipe the output from this command. | |
748a9306 | 2835 | |
a0d0e21e LW |
2836 | =item No DB::DB routine defined |
2837 | ||
be771a83 | 2838 | (F) The currently executing code was compiled with the B<-d> switch, but |
ccafdc96 RGS |
2839 | for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::> |
2840 | module) didn't define a routine to be called at the beginning of each | |
2841 | statement. | |
a0d0e21e LW |
2842 | |
2843 | =item No dbm on this machine | |
2844 | ||
2845 | (P) This is counted as an internal error, because every machine should | |
5f05dabc | 2846 | supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>. |
a0d0e21e | 2847 | |
ccafdc96 | 2848 | =item No DB::sub routine defined |
a0d0e21e | 2849 | |
ccafdc96 RGS |
2850 | (F) The currently executing code was compiled with the B<-d> switch, but |
2851 | for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::> | |
2852 | module) didn't define a C<DB::sub> routine to be called at the beginning | |
2853 | of each ordinary subroutine call. | |
a0d0e21e | 2854 | |
96ebfdd7 RK |
2855 | =item No B<-e> allowed in setuid scripts |
2856 | ||
2857 | (F) A setuid script can't be specified by the user. | |
2858 | ||
c47ff5f1 | 2859 | =item No error file after 2> or 2>> on command line |
748a9306 | 2860 | |
be771a83 GS |
2861 | (F) An error peculiar to VMS. Perl handles its own command line |
2862 | redirection, and found a '2>' or a '2>>' on the command line, but can't | |
2863 | find the name of the file to which to write data destined for stderr. | |
748a9306 | 2864 | |
49704364 WL |
2865 | =item No group ending character '%c' found in template |
2866 | ||
2867 | (F) A pack or unpack template has an opening '(' or '[' without its | |
2868 | matching counterpart. See L<perlfunc/pack>. | |
2869 | ||
c47ff5f1 | 2870 | =item No input file after < on command line |
748a9306 | 2871 | |
be771a83 GS |
2872 | (F) An error peculiar to VMS. Perl handles its own command line |
2873 | redirection, and found a '<' on the command line, but can't find the | |
2874 | name of the file from which to read data for stdin. | |
748a9306 | 2875 | |
6df41af2 GS |
2876 | =item No #! line |
2877 | ||
2878 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2879 | even on machines that don't support the #! construct. | |
2880 | ||
2c7d6b9c RGS |
2881 | =item No next::method '%s' found for %s |
2882 | ||
2883 | (F) C<next::method> found no further instances of this method name | |
2884 | in the remaining packages of the MRO of this class. If you don't want | |
2885 | it throwing an exception, use C<maybe::next::method> | |
2886 | or C<next::can>. See L<mro>. | |
2887 | ||
6df41af2 GS |
2888 | =item "no" not allowed in expression |
2889 | ||
be771a83 GS |
2890 | (F) The "no" keyword is recognized and executed at compile time, and |
2891 | returns no useful value. See L<perlmod>. | |
6df41af2 | 2892 | |
c47ff5f1 | 2893 | =item No output file after > on command line |
748a9306 | 2894 | |
be771a83 GS |
2895 | (F) An error peculiar to VMS. Perl handles its own command line |
2896 | redirection, and found a lone '>' at the end of the command line, so it | |
2897 | doesn't know where you wanted to redirect stdout. | |
748a9306 | 2898 | |
c47ff5f1 | 2899 | =item No output file after > or >> on command line |
748a9306 | 2900 | |
be771a83 GS |
2901 | (F) An error peculiar to VMS. Perl handles its own command line |
2902 | redirection, and found a '>' or a '>>' on the command line, but can't | |
2903 | find the name of the file to which to write data destined for stdout. | |
748a9306 | 2904 | |
1ec3e8de GS |
2905 | =item No package name allowed for variable %s in "our" |
2906 | ||
be771a83 GS |
2907 | (F) Fully qualified variable names are not allowed in "our" |
2908 | declarations, because that doesn't make much sense under existing | |
2909 | semantics. Such syntax is reserved for future extensions. | |
1ec3e8de | 2910 | |
a0d0e21e LW |
2911 | =item No Perl script found in input |
2912 | ||
2913 | (F) You called C<perl -x>, but no line was found in the file beginning | |
2914 | with #! and containing the word "perl". | |
2915 | ||
2916 | =item No setregid available | |
2917 | ||
2918 | (F) Configure didn't find anything resembling the setregid() call for | |
2919 | your system. | |
2920 | ||
2921 | =item No setreuid available | |
2922 | ||
2923 | (F) Configure didn't find anything resembling the setreuid() call for | |
2924 | your system. | |
2925 | ||
6df41af2 GS |
2926 | =item No %s specified for -%c |
2927 | ||
2928 | (F) The indicated command line switch needs a mandatory argument, but | |
2929 | you haven't specified one. | |
e75d1f10 RD |
2930 | =item No such class field "%s" in variable %s of type %s |
2931 | ||
2932 | (F) You tried to access a key from a hash through the indicated typed variable | |
2933 | but that key is not allowed by the package of the same type. The indicated | |
2934 | package has restricted the set of allowed keys using the L<fields> pragma. | |
2935 | ||
2c692339 RGS |
2936 | =item No such class %s |
2937 | ||
30c282f6 | 2938 | (F) You provided a class qualifier in a "my", "our" or "state" declaration, but |
2c692339 RGS |
2939 | this class doesn't exist at this point in your program. |
2940 | ||
3c20a832 SP |
2941 | =item No such hook: %s |
2942 | ||
2943 | (F) You specified a signal hook that was not recognized by Perl. Currently, Perl | |
2944 | accepts C<__DIE__> and C<__WARN__> as valid signal hooks | |
2945 | ||
6df41af2 GS |
2946 | =item No such pipe open |
2947 | ||
2948 | (P) An error peculiar to VMS. The internal routine my_pclose() tried to | |
be771a83 GS |
2949 | close a pipe which hadn't been opened. This should have been caught |
2950 | earlier as an attempt to close an unopened filehandle. | |
6df41af2 | 2951 | |
a0d0e21e LW |
2952 | =item No such signal: SIG%s |
2953 | ||
be771a83 GS |
2954 | (W signal) You specified a signal name as a subscript to %SIG that was |
2955 | not recognized. Say C<kill -l> in your shell to see the valid signal | |
2956 | names on your system. | |
a0d0e21e LW |
2957 | |
2958 | =item Not a CODE reference | |
2959 | ||
2960 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2961 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
2962 | use the ref() function to find out what kind of ref it really was. See |
2963 | also L<perlref>. | |
a0d0e21e LW |
2964 | |
2965 | =item Not a format reference | |
2966 | ||
2967 | (F) I'm not sure how you managed to generate a reference to an anonymous | |
2968 | format, but this indicates you did, and that it didn't exist. | |
2969 | ||
2970 | =item Not a GLOB reference | |
2971 | ||
be771a83 GS |
2972 | (F) Perl was trying to evaluate a reference to a "typeglob" (that is, a |
2973 | symbol table entry that looks like C<*foo>), but found a reference to | |
2974 | something else instead. You can use the ref() function to find out what | |
2975 | kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
2976 | |
2977 | =item Not a HASH reference | |
2978 | ||
be771a83 GS |
2979 | (F) Perl was trying to evaluate a reference to a hash value, but found a |
2980 | reference to something else instead. You can use the ref() function to | |
2981 | find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e | 2982 | |
6df41af2 GS |
2983 | =item Not an ARRAY reference |
2984 | ||
be771a83 GS |
2985 | (F) Perl was trying to evaluate a reference to an array value, but found |
2986 | a reference to something else instead. You can use the ref() function | |
2987 | to find out what kind of ref it really was. See L<perlref>. | |
6df41af2 | 2988 | |
a0d0e21e LW |
2989 | =item Not a perl script |
2990 | ||
2991 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2992 | even on machines that don't support the #! construct. The line must | |
2993 | mention perl. | |
2994 | ||
2995 | =item Not a SCALAR reference | |
2996 | ||
be771a83 GS |
2997 | (F) Perl was trying to evaluate a reference to a scalar value, but found |
2998 | a reference to something else instead. You can use the ref() function | |
2999 | to find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
3000 | |
3001 | =item Not a subroutine reference | |
3002 | ||
3003 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
3004 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
3005 | use the ref() function to find out what kind of ref it really was. See |
3006 | also L<perlref>. | |
a0d0e21e | 3007 | |
e7ea3e70 | 3008 | =item Not a subroutine reference in overload table |
a0d0e21e LW |
3009 | |
3010 | (F) An attempt was made to specify an entry in an overloading table that | |
8b1a09fc | 3011 | doesn't somehow point to a valid subroutine. See L<overload>. |
a0d0e21e | 3012 | |
a0d0e21e LW |
3013 | =item Not enough arguments for %s |
3014 | ||
3015 | (F) The function requires more arguments than you specified. | |
3016 | ||
6df41af2 GS |
3017 | =item Not enough format arguments |
3018 | ||
be771a83 GS |
3019 | (W syntax) A format specified more picture fields than the next line |
3020 | supplied. See L<perlform>. | |
6df41af2 GS |
3021 | |
3022 | =item %s: not found | |
3023 | ||
be771a83 GS |
3024 | (A) You've accidentally run your script through the Bourne shell instead |
3025 | of Perl. Check the #! line, or manually feed your script into Perl | |
3026 | yourself. | |
6df41af2 GS |
3027 | |
3028 | =item no UTC offset information; assuming local time is UTC | |
a0d0e21e | 3029 | |
6df41af2 GS |
3030 | (S) A warning peculiar to VMS. Perl was unable to find the local |
3031 | timezone offset, so it's assuming that local system time is equivalent | |
be771a83 GS |
3032 | to UTC. If it's not, define the logical name |
3033 | F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which | |
3034 | need to be added to UTC to get local time. | |
a0d0e21e | 3035 | |
f0a2b745 KW |
3036 | =item Non-octal character '%c'. Resolved as "%s" |
3037 | ||
3038 | (W digit) In parsing an octal numeric constant, a character was unexpectedly | |
3039 | encountered that isn't octal. The resulting value is as indicated. | |
3040 | ||
4ef2275c GA |
3041 | =item Non-string passed as bitmask |
3042 | ||
3043 | (W misc) A number has been passed as a bitmask argument to select(). | |
3044 | Use the vec() function to construct the file descriptor bitmasks for | |
3045 | select. See L<perlfunc/select> | |
3046 | ||
a0d0e21e LW |
3047 | =item Null filename used |
3048 | ||
be771a83 GS |
3049 | (F) You can't require the null filename, especially because on many |
3050 | machines that means the current directory! See L<perlfunc/require>. | |
a0d0e21e | 3051 | |
6df41af2 GS |
3052 | =item NULL OP IN RUN |
3053 | ||
be771a83 GS |
3054 | (P debugging) Some internal routine called run() with a null opcode |
3055 | pointer. | |
6df41af2 | 3056 | |
55497cff | 3057 | =item Null picture in formline |
3058 | ||
3059 | (F) The first argument to formline must be a valid format picture | |
3060 | specification. It was found to be empty, which probably means you | |
3061 | supplied it an uninitialized value. See L<perlform>. | |
3062 | ||
a0d0e21e LW |
3063 | =item Null realloc |
3064 | ||
3065 | (P) An attempt was made to realloc NULL. | |
3066 | ||
3067 | =item NULL regexp argument | |
3068 | ||
5f05dabc | 3069 | (P) The internal pattern matching routines blew it big time. |
a0d0e21e LW |
3070 | |
3071 | =item NULL regexp parameter | |
3072 | ||
3073 | (P) The internal pattern matching routines are out of their gourd. | |
3074 | ||
fc36a67e | 3075 | =item Number too long |
3076 | ||
be771a83 | 3077 | (F) Perl limits the representation of decimal numbers in programs to |
da75cd15 | 3078 | about 250 characters. You've exceeded that length. Future |
be771a83 GS |
3079 | versions of Perl are likely to eliminate this arbitrary limitation. In |
3080 | the meantime, try using scientific notation (e.g. "1e6" instead of | |
3081 | "1_000_000"). | |
fc36a67e | 3082 | |
f0a2b745 KW |
3083 | =item Number with no digits |
3084 | ||
3085 | (F) Perl was looking for a number but found nothing that looked like a number. | |
3086 | This happens, for example with C<\o{}>, with no number between the braces. | |
3087 | ||
6df41af2 GS |
3088 | =item Octal number in vector unsupported |
3089 | ||
be771a83 GS |
3090 | (F) Numbers with a leading C<0> are not currently allowed in vectors. |
3091 | The octal number interpretation of such numbers may be supported in a | |
3092 | future version. | |
6df41af2 | 3093 | |
252aa082 JH |
3094 | =item Octal number > 037777777777 non-portable |
3095 | ||
75b44862 | 3096 | (W portable) The octal number you specified is larger than 2**32-1 |
be771a83 GS |
3097 | (4294967295) and therefore non-portable between systems. See |
3098 | L<perlport> for more on portability concerns. | |
252aa082 JH |
3099 | |
3100 | See also L<perlport> for writing portable code. | |
3101 | ||
6ad11d81 JH |
3102 | =item Odd number of arguments for overload::constant |
3103 | ||
04a80ee0 RGS |
3104 | (W overload) The call to overload::constant contained an odd number of |
3105 | arguments. The arguments should come in pairs. | |
6ad11d81 | 3106 | |
b21befc1 MG |
3107 | =item Odd number of elements in anonymous hash |
3108 | ||
3109 | (W misc) You specified an odd number of elements to initialize a hash, | |
3110 | which is odd, because hashes come in key/value pairs. | |
3111 | ||
1930e939 | 3112 | =item Odd number of elements in hash assignment |
a0d0e21e | 3113 | |
be771a83 GS |
3114 | (W misc) You specified an odd number of elements to initialize a hash, |
3115 | which is odd, because hashes come in key/value pairs. | |
a0d0e21e | 3116 | |
bbce6d69 | 3117 | =item Offset outside string |
3118 | ||
42bc49da JH |
3119 | (F, W layer) You tried to do a read/write/send/recv/seek operation |
3120 | with an offset pointing outside the buffer. This is difficult to | |
f5a7294f JH |
3121 | imagine. The sole exceptions to this are that zero padding will |
3122 | take place when going past the end of the string when either | |
3123 | C<sysread()>ing a file, or when seeking past the end of a scalar opened | |
1a7a2554 MB |
3124 | for I/O (in anticipation of future reads and to imitate the behaviour |
3125 | with real files). | |
bbce6d69 | 3126 | |
c289d2f7 | 3127 | =item %s() on unopened %s |
2dd78f96 JH |
3128 | |
3129 | (W unopened) An I/O operation was attempted on a filehandle that was | |
3130 | never initialized. You need to do an open(), a sysopen(), or a socket() | |
3131 | call, or call a constructor from the FileHandle package. | |
3132 | ||
96ebfdd7 RK |
3133 | =item -%s on unopened filehandle %s |
3134 | ||
3135 | (W unopened) You tried to invoke a file test operator on a filehandle | |
3136 | that isn't open. Check your control flow. See also L<perlfunc/-X>. | |
3137 | ||
a0d0e21e LW |
3138 | =item oops: oopsAV |
3139 | ||
e476b1b5 | 3140 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e LW |
3141 | |
3142 | =item oops: oopsHV | |
3143 | ||
e476b1b5 | 3144 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e | 3145 | |
abc718f2 RGS |
3146 | =item Opening dirhandle %s also as a file |
3147 | ||
3148 | (W io deprecated) You used open() to associate a filehandle to | |
3149 | a symbol (glob or scalar) that already holds a dirhandle. | |
3150 | Although legal, this idiom might render your code confusing | |
3151 | and is deprecated. | |
3152 | ||
3153 | =item Opening filehandle %s also as a directory | |
3154 | ||
3155 | (W io deprecated) You used opendir() to associate a dirhandle to | |
3156 | a symbol (glob or scalar) that already holds a filehandle. | |
3157 | Although legal, this idiom might render your code confusing | |
3158 | and is deprecated. | |
3159 | ||
a0288114 | 3160 | =item Operation "%s": no method found, %s |
44a8e56a | 3161 | |
be771a83 GS |
3162 | (F) An attempt was made to perform an overloaded operation for which no |
3163 | handler was defined. While some handlers can be autogenerated in terms | |
3164 | of other handlers, there is no default handler for any operation, unless | |
3165 | C<fallback> overloading key is specified to be true. See L<overload>. | |
44a8e56a | 3166 | |
748a9306 LW |
3167 | =item Operator or semicolon missing before %s |
3168 | ||
be771a83 GS |
3169 | (S ambiguous) You used a variable or subroutine call where the parser |
3170 | was expecting an operator. The parser has assumed you really meant to | |
3171 | use an operator, but this is highly likely to be incorrect. For | |
3172 | example, if you say "*foo *foo" it will be interpreted as if you said | |
3173 | "*foo * 'foo'". | |
748a9306 | 3174 | |
6df41af2 GS |
3175 | =item "our" variable %s redeclared |
3176 | ||
be771a83 GS |
3177 | (W misc) You seem to have already declared the same global once before |
3178 | in the current lexical scope. | |
6df41af2 | 3179 | |
a80b8354 GS |
3180 | =item Out of memory! |
3181 | ||
3182 | (X) The malloc() function returned 0, indicating there was insufficient | |
be771a83 GS |
3183 | remaining memory (or virtual memory) to satisfy the request. Perl has |
3184 | no option but to exit immediately. | |
a80b8354 | 3185 | |
19a52907 JH |
3186 | At least in Unix you may be able to get past this by increasing your |
3187 | process datasize limits: in csh/tcsh use C<limit> and | |
3188 | C<limit datasize n> (where C<n> is the number of kilobytes) to check | |
3189 | the current limits and change them, and in ksh/bash/zsh use C<ulimit -a> | |
3190 | and C<ulimit -d n>, respectively. | |
3191 | ||
6d3b25aa RGS |
3192 | =item Out of memory during %s extend |
3193 | ||
3194 | (X) An attempt was made to extend an array, a list, or a string beyond | |
3195 | the largest possible memory allocation. | |
3196 | ||
6df41af2 | 3197 | =item Out of memory during "large" request for %s |
a0d0e21e | 3198 | |
6df41af2 GS |
3199 | (F) The malloc() function returned 0, indicating there was insufficient |
3200 | remaining memory (or virtual memory) to satisfy the request. However, | |
be771a83 GS |
3201 | the request was judged large enough (compile-time default is 64K), so a |
3202 | possibility to shut down by trapping this error is granted. | |
a0d0e21e | 3203 | |
1b979e0a | 3204 | =item Out of memory during request for %s |
a0d0e21e | 3205 | |
be771a83 GS |
3206 | (X|F) The malloc() function returned 0, indicating there was |
3207 | insufficient remaining memory (or virtual memory) to satisfy the | |
3208 | request. | |
eff9c6e2 CS |
3209 | |
3210 | The request was judged to be small, so the possibility to trap it | |
3211 | depends on the way perl was compiled. By default it is not trappable. | |
be771a83 GS |
3212 | However, if compiled for this, Perl may use the contents of C<$^M> as an |
3213 | emergency pool after die()ing with this message. In this case the error | |
b022d2d2 IZ |
3214 | is trappable I<once>, and the error message will include the line and file |
3215 | where the failed request happened. | |
55497cff | 3216 | |
1b979e0a IZ |
3217 | =item Out of memory during ridiculously large request |
3218 | ||
3219 | (F) You can't allocate more than 2^31+"small amount" bytes. This error | |
be771a83 GS |
3220 | is most likely to be caused by a typo in the Perl program. e.g., |
3221 | C<$arr[time]> instead of C<$arr[$time]>. | |
1b979e0a | 3222 | |
6df41af2 GS |
3223 | =item Out of memory for yacc stack |
3224 | ||
be771a83 GS |
3225 | (F) The yacc parser wanted to grow its stack so it could continue |
3226 | parsing, but realloc() wouldn't give it more memory, virtual or | |
3227 | otherwise. | |
6df41af2 | 3228 | |
28be1210 TH |
3229 | =item '.' outside of string in pack |
3230 | ||
3231 | (F) The argument to a '.' in your template tried to move the working | |
3232 | position to before the start of the packed string being built. | |
3233 | ||
49704364 | 3234 | =item '@' outside of string in unpack |
6df41af2 | 3235 | |
49704364 | 3236 | (F) You had a template that specified an absolute position outside |
6df41af2 GS |
3237 | the string being unpacked. See L<perlfunc/pack>. |
3238 | ||
f337b084 TH |
3239 | =item '@' outside of string with malformed UTF-8 in unpack |
3240 | ||
3241 | (F) You had a template that specified an absolute position outside | |
3242 | the string being unpacked. The string being unpacked was also invalid | |
3243 | UTF-8. See L<perlfunc/pack>. | |
3244 | ||
7cb0cfe6 BM |
3245 | =item Overloaded dereference did not return a reference |
3246 | ||
3247 | (F) An object with an overloaded dereference operator was dereferenced, | |
3248 | but the overloaded operation did not return a reference. See | |
3249 | L<overload>. | |
3250 | ||
3251 | =item Overloaded qr did not return a REGEXP | |
3252 | ||
3253 | (F) An object with a C<qr> overload was used as part of a match, but the | |
3254 | overloaded operation didn't return a compiled regexp. See L<overload>. | |
3255 | ||
6df41af2 GS |
3256 | =item %s package attribute may clash with future reserved word: %s |
3257 | ||
be771a83 GS |
3258 | (W reserved) A lowercase attribute name was used that had a |
3259 | package-specific handler. That name might have a meaning to Perl itself | |
3260 | some day, even though it doesn't yet. Perhaps you should use a | |
3261 | mixed-case attribute name, instead. See L<attributes>. | |
6df41af2 | 3262 | |
96ebfdd7 RK |
3263 | =item pack/unpack repeat count overflow |
3264 | ||
3265 | (F) You can't specify a repeat count so large that it overflows your | |
3266 | signed integers. See L<perlfunc/pack>. | |
3267 | ||
a0d0e21e LW |
3268 | =item page overflow |
3269 | ||
be771a83 GS |
3270 | (W io) A single call to write() produced more lines than can fit on a |
3271 | page. See L<perlform>. | |
a0d0e21e | 3272 | |
6df41af2 GS |
3273 | =item panic: %s |
3274 | ||
3275 | (P) An internal error. | |
3276 | ||
c99a1475 NC |
3277 | =item panic: attempt to call %s in %s |
3278 | ||
3279 | (P) One of the file test operators entered a code branch that calls | |
3280 | an ACL related-function, but that function is not available on this | |
3281 | platform. Earlier checks mean that it should not be possible to | |
3282 | enter this branch on this platform. | |
3283 | ||
a0d0e21e LW |
3284 | =item panic: ck_grep |
3285 | ||
3286 | (P) Failed an internal consistency check trying to compile a grep. | |
3287 | ||
3288 | =item panic: ck_split | |
3289 | ||
3290 | (P) Failed an internal consistency check trying to compile a split. | |
3291 | ||
3292 | =item panic: corrupt saved stack index | |
3293 | ||
be771a83 GS |
3294 | (P) The savestack was requested to restore more localized values than |
3295 | there are in the savestack. | |
a0d0e21e | 3296 | |
810b8aa5 GS |
3297 | =item panic: del_backref |
3298 | ||
3299 | (P) Failed an internal consistency check while trying to reset a weak | |
3300 | reference. | |
3301 | ||
7619c85e RG |
3302 | =item panic: Devel::DProf inconsistent subroutine return |
3303 | ||
3304 | (P) Devel::DProf called a subroutine that exited using goto(LABEL), | |
3305 | last(LABEL) or next(LABEL). Leaving that way a subroutine called from | |
3306 | an XSUB will lead very probably to a crash of the interpreter. This is | |
3307 | a bug that will hopefully one day get fixed. | |
3308 | ||
a0d0e21e LW |
3309 | =item panic: die %s |
3310 | ||
3311 | (P) We popped the context stack to an eval context, and then discovered | |
3312 | it wasn't an eval context. | |
3313 | ||
a0d0e21e LW |
3314 | =item panic: do_subst |
3315 | ||
be771a83 GS |
3316 | (P) The internal pp_subst() routine was called with invalid operational |
3317 | data. | |
a0d0e21e | 3318 | |
2269b42e | 3319 | =item panic: do_trans_%s |
a0d0e21e | 3320 | |
2269b42e | 3321 | (P) The internal do_trans routines were called with invalid operational |
be771a83 | 3322 | data. |
a0d0e21e | 3323 | |
b7f7fd0b NC |
3324 | =item panic: fold_constants JMPENV_PUSH returned %d |
3325 | ||
10203f38 | 3326 | (P) While attempting folding constants an exception other than an C<eval> |
b7f7fd0b NC |
3327 | failure was caught. |
3328 | ||
c635e13b | 3329 | =item panic: frexp |
3330 | ||
3331 | (P) The library function frexp() failed, making printf("%f") impossible. | |
3332 | ||
a0d0e21e LW |
3333 | =item panic: goto |
3334 | ||
3335 | (P) We popped the context stack to a context with the specified label, | |
3336 | and then discovered it wasn't a context we know how to do a goto in. | |
3337 | ||
23976bdd NC |
3338 | =item panic: hfreeentries failed to free hash |
3339 | ||
3340 | (P) The internal routine used to clear a hashes entries tried repeatedly, | |
3341 | but each time something added more entries to the hash. Most likely the hash | |
3342 | contains an object with a reference back to the hash and a destructor that | |
3343 | adds a new object to the hash. | |
3344 | ||
a0d0e21e LW |
3345 | =item panic: INTERPCASEMOD |
3346 | ||
3347 | (P) The lexer got into a bad state at a case modifier. | |
3348 | ||
3349 | =item panic: INTERPCONCAT | |
3350 | ||
3351 | (P) The lexer got into a bad state parsing a string with brackets. | |
3352 | ||
e446cec8 IZ |
3353 | =item panic: kid popen errno read |
3354 | ||
3355 | (F) forked child returned an incomprehensible message about its errno. | |
3356 | ||
a0d0e21e LW |
3357 | =item panic: last |
3358 | ||
3359 | (P) We popped the context stack to a block context, and then discovered | |
3360 | it wasn't a block context. | |
3361 | ||
3362 | =item panic: leave_scope clearsv | |
3363 | ||
be771a83 GS |
3364 | (P) A writable lexical variable became read-only somehow within the |
3365 | scope. | |
a0d0e21e LW |
3366 | |
3367 | =item panic: leave_scope inconsistency | |
3368 | ||
3369 | (P) The savestack probably got out of sync. At least, there was an | |
3370 | invalid enum on the top of it. | |
3371 | ||
810b8aa5 GS |
3372 | =item panic: magic_killbackrefs |
3373 | ||
3374 | (P) Failed an internal consistency check while trying to reset all weak | |
3375 | references to an object. | |
3376 | ||
6df41af2 GS |
3377 | =item panic: malloc |
3378 | ||
3379 | (P) Something requested a negative number of bytes of malloc. | |
3380 | ||
27d5b266 JH |
3381 | =item panic: memory wrap |
3382 | ||
3383 | (P) Something tried to allocate more memory than possible. | |
3384 | ||
a0d0e21e LW |
3385 | =item panic: pad_alloc |
3386 | ||
3387 | (P) The compiler got confused about which scratch pad it was allocating | |
3388 | and freeing temporaries and lexicals from. | |
3389 | ||
3390 | =item panic: pad_free curpad | |
3391 | ||
3392 | (P) The compiler got confused about which scratch pad it was allocating | |
3393 | and freeing temporaries and lexicals from. | |
3394 | ||
3395 | =item panic: pad_free po | |
3396 | ||
3397 | (P) An invalid scratch pad offset was detected internally. | |
3398 | ||
3399 | =item panic: pad_reset curpad | |
3400 | ||
3401 | (P) The compiler got confused about which scratch pad it was allocating | |
3402 | and freeing temporaries and lexicals from. | |
3403 | ||
3404 | =item panic: pad_sv po | |
3405 | ||
3406 | (P) An invalid scratch pad offset was detected internally. | |
3407 | ||
3408 | =item panic: pad_swipe curpad | |
3409 | ||
3410 | (P) The compiler got confused about which scratch pad it was allocating | |
3411 | and freeing temporaries and lexicals from. | |
3412 | ||
3413 | =item panic: pad_swipe po | |
3414 | ||
3415 | (P) An invalid scratch pad offset was detected internally. | |
3416 | ||
3417 | =item panic: pp_iter | |
3418 | ||
3419 | (P) The foreach iterator got called in a non-loop context frame. | |
3420 | ||
96ebfdd7 RK |
3421 | =item panic: pp_match%s |
3422 | ||
3423 | (P) The internal pp_match() routine was called with invalid operational | |
3424 | data. | |
3425 | ||
2269b42e JH |
3426 | =item panic: pp_split |
3427 | ||
3428 | (P) Something terrible went wrong in setting up for the split. | |
3429 | ||
a0d0e21e LW |
3430 | =item panic: realloc |
3431 | ||
3432 | (P) Something requested a negative number of bytes of realloc. | |
3433 | ||
3434 | =item panic: restartop | |
3435 | ||
3436 | (P) Some internal routine requested a goto (or something like it), and | |
3437 | didn't supply the destination. | |
3438 | ||
3439 | =item panic: return | |
3440 | ||
3441 | (P) We popped the context stack to a subroutine or eval context, and | |
3442 | then discovered it wasn't a subroutine or eval context. | |
3443 | ||
3444 | =item panic: scan_num | |
3445 | ||
3446 | (P) scan_num() got called on something that wasn't a number. | |
3447 | ||
6c65d5f9 NC |
3448 | =item panic: sv_chop %s |
3449 | ||
3450 | (P) The sv_chop() routine was passed a position that is not within the | |
3451 | scalar's string buffer. | |
3452 | ||
a0d0e21e LW |
3453 | =item panic: sv_insert |
3454 | ||
3455 | (P) The sv_insert() routine was told to remove more string than there | |
3456 | was string. | |
3457 | ||
3458 | =item panic: top_env | |
3459 | ||
6224f72b | 3460 | (P) The compiler attempted to do a goto, or something weird like that. |
a0d0e21e | 3461 | |
65bca31a NC |
3462 | =item panic: unimplemented op %s (#%d) called |
3463 | ||
3464 | (P) The compiler is screwed up and attempted to use an op that isn't permitted | |
3465 | at run time. | |
3466 | ||
dea0fc0b JH |
3467 | =item panic: utf16_to_utf8: odd bytelen |
3468 | ||
3469 | (P) Something tried to call utf16_to_utf8 with an odd (as opposed | |
64977eb6 | 3470 | to even) byte length. |
dea0fc0b | 3471 | |
e0ea5e2d NC |
3472 | =item panic: utf16_to_utf8_reversed: odd bytelen |
3473 | ||
3474 | (P) Something tried to call utf16_to_utf8_reversed with an odd (as opposed | |
3475 | to even) byte length. | |
3476 | ||
2f7da168 RK |
3477 | =item panic: yylex |
3478 | ||
3479 | (P) The lexer got into a bad state while processing a case modifier. | |
3480 | ||
28ac2b49 Z |
3481 | =item Parsing code internal error (%s) |
3482 | ||
3483 | (F) Parsing code supplied by an extension violated the parser's API in | |
3484 | a detectable way. | |
3485 | ||
1a147d38 YO |
3486 | =item Pattern subroutine nesting without pos change exceeded limit in regex; marked by <-- HERE in m/%s/ |
3487 | ||
3488 | (F) You used a pattern that uses too many nested subpattern calls without | |
3489 | consuming any text. Restructure the pattern so text is consumed before the | |
3490 | nesting limit is exceeded. | |
3491 | ||
3492 | The <-- HERE shows in the regular expression about where the problem was | |
3493 | discovered. | |
3494 | ||
7b8d334a | 3495 | =item Parentheses missing around "%s" list |
a0d0e21e | 3496 | |
e476b1b5 | 3497 | (W parenthesis) You said something like |
a0d0e21e LW |
3498 | |
3499 | my $foo, $bar = @_; | |
3500 | ||
3501 | when you meant | |
3502 | ||
3503 | my ($foo, $bar) = @_; | |
3504 | ||
30c282f6 | 3505 | Remember that "my", "our", "local" and "state" bind tighter than comma. |
a0d0e21e | 3506 | |
96ebfdd7 RK |
3507 | =item C<-p> destination: %s |
3508 | ||
3509 | (F) An error occurred during the implicit output invoked by the C<-p> | |
3510 | command-line switch. (This output goes to STDOUT unless you've | |
3511 | redirected it with select().) | |
3512 | ||
3513 | =item (perhaps you forgot to load "%s"?) | |
3514 | ||
3515 | (F) This is an educated guess made in conjunction with the message | |
3516 | "Can't locate object method \"%s\" via package \"%s\"". It often means | |
3517 | that a method requires a package that has not been loaded. | |
3518 | ||
1109a392 MHM |
3519 | =item Perl_my_%s() not available |
3520 | ||
3521 | (F) Your platform has very uncommon byte-order and integer size, | |
3522 | so it was not possible to set up some or all fixed-width byte-order | |
3523 | conversion functions. This is only a problem when you're using the | |
3524 | '<' or '>' modifiers in (un)pack templates. See L<perlfunc/pack>. | |
3525 | ||
6d3b25aa RGS |
3526 | =item Perl %s required--this is only version %s, stopped |
3527 | ||
3528 | (F) The module in question uses features of a version of Perl more | |
3529 | recent than the currently running version. How long has it been since | |
3530 | you upgraded, anyway? See L<perlfunc/require>. | |
3531 | ||
6df41af2 GS |
3532 | =item PERL_SH_DIR too long |
3533 | ||
3534 | (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the | |
fecfaeb8 | 3535 | C<sh>-shell in. See "PERL_SH_DIR" in L<perlos2>. |
6df41af2 | 3536 | |
96ebfdd7 RK |
3537 | =item PERL_SIGNALS illegal: "%s" |
3538 | ||
3539 | See L<perlrun/PERL_SIGNALS> for legal values. | |
3540 | ||
6df41af2 GS |
3541 | =item perl: warning: Setting locale failed. |
3542 | ||
3543 | (S) The whole warning message will look something like: | |
3544 | ||
3545 | perl: warning: Setting locale failed. | |
3546 | perl: warning: Please check that your locale settings: | |
3547 | LC_ALL = "En_US", | |
3548 | LANG = (unset) | |
3549 | are supported and installed on your system. | |
3550 | perl: warning: Falling back to the standard locale ("C"). | |
3551 | ||
3552 | Exactly what were the failed locale settings varies. In the above the | |
3553 | settings were that the LC_ALL was "En_US" and the LANG had no value. | |
0ea6b70f JH |
3554 | This error means that Perl detected that you and/or your operating |
3555 | system supplier and/or system administrator have set up the so-called | |
3556 | locale system but Perl could not use those settings. This was not | |
3557 | dead serious, fortunately: there is a "default locale" called "C" that | |
3558 | Perl can and will use, the script will be run. Before you really fix | |
3559 | the problem, however, you will get the same error message each time | |
3560 | you run Perl. How to really fix the problem can be found in | |
3561 | L<perllocale> section B<LOCALE PROBLEMS>. | |
6df41af2 | 3562 | |
bd3fa61c | 3563 | =item pid %x not a child |
748a9306 | 3564 | |
be771a83 GS |
3565 | (W exec) A warning peculiar to VMS. Waitpid() was asked to wait for a |
3566 | process which isn't a subprocess of the current process. While this is | |
3567 | fine from VMS' perspective, it's probably not what you intended. | |
748a9306 | 3568 | |
49704364 | 3569 | =item 'P' must have an explicit size in unpack |
3bf38418 WL |
3570 | |
3571 | (F) The unpack format P must have an explicit size, not "*". | |
3572 | ||
96ebfdd7 RK |
3573 | =item POSIX class [:%s:] unknown in regex; marked by <-- HERE in m/%s/ |
3574 | ||
3575 | (F) The class in the character class [: :] syntax is unknown. The <-- HERE | |
3576 | shows in the regular expression about where the problem was discovered. | |
3577 | Note that the POSIX character classes do B<not> have the C<is> prefix | |
3578 | the corresponding C interfaces have: in other words, it's C<[[:print:]]>, | |
3579 | not C<isprint>. See L<perlre>. | |
3580 | ||
3581 | =item POSIX getpgrp can't take an argument | |
3582 | ||
3583 | (F) Your system has POSIX getpgrp(), which takes no argument, unlike | |
3584 | the BSD version, which takes a pid. | |
3585 | ||
49704364 | 3586 | =item POSIX syntax [%s] belongs inside character classes in regex; marked by <-- HERE in m/%s/ |
b45f050a | 3587 | |
9a0b3859 | 3588 | (W regexp) The character class constructs [: :], [= =], and [. .] go |
7253e4e3 RK |
3589 | I<inside> character classes, the [] are part of the construct, for example: |
3590 | /[012[:alpha:]345]/. Note that [= =] and [. .] are not currently | |
3591 | implemented; they are simply placeholders for future extensions and will | |
3592 | cause fatal errors. The <-- HERE shows in the regular expression about | |
3593 | where the problem was discovered. See L<perlre>. | |
b45f050a | 3594 | |
49704364 | 3595 | =item POSIX syntax [. .] is reserved for future extensions in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
3596 | |
3597 | (F regexp) Within regular expression character classes ([]) the syntax | |
7253e4e3 RK |
3598 | beginning with "[." and ending with ".]" is reserved for future extensions. |
3599 | If you need to represent those character sequences inside a regular | |
3600 | expression character class, just quote the square brackets with the | |
3601 | backslash: "\[." and ".\]". The <-- HERE shows in the regular expression | |
3602 | about where the problem was discovered. See L<perlre>. | |
b45f050a | 3603 | |
49704364 | 3604 | =item POSIX syntax [= =] is reserved for future extensions in regex; marked by <-- HERE in m/%s/ |
b45f050a | 3605 | |
7253e4e3 RK |
3606 | (F) Within regular expression character classes ([]) the syntax beginning |
3607 | with "[=" and ending with "=]" is reserved for future extensions. If you | |
3608 | need to represent those character sequences inside a regular expression | |
3609 | character class, just quote the square brackets with the backslash: "\[=" | |
3610 | and "=\]". The <-- HERE shows in the regular expression about where the | |
3611 | problem was discovered. See L<perlre>. | |
b45f050a | 3612 | |
bbce6d69 | 3613 | =item Possible attempt to put comments in qw() list |
3614 | ||
e476b1b5 | 3615 | (W qw) qw() lists contain items separated by whitespace; as with literal |
75b44862 | 3616 | strings, comment characters are not ignored, but are instead treated as |
be771a83 GS |
3617 | literal data. (You may have used different delimiters than the |
3618 | parentheses shown here; braces are also frequently used.) | |
bbce6d69 | 3619 | |
774d564b | 3620 | You probably wrote something like this: |
3621 | ||
54310121 | 3622 | @list = qw( |
774d564b | 3623 | a # a comment |
bbce6d69 | 3624 | b # another comment |
774d564b | 3625 | ); |
bbce6d69 | 3626 | |
3627 | when you should have written this: | |
3628 | ||
774d564b | 3629 | @list = qw( |
54310121 | 3630 | a |
3631 | b | |
774d564b | 3632 | ); |
3633 | ||
3634 | If you really want comments, build your list the | |
3635 | old-fashioned way, with quotes and commas: | |
3636 | ||
3637 | @list = ( | |
3638 | 'a', # a comment | |
3639 | 'b', # another comment | |
3640 | ); | |
bbce6d69 | 3641 | |
3642 | =item Possible attempt to separate words with commas | |
3643 | ||
be771a83 GS |
3644 | (W qw) qw() lists contain items separated by whitespace; therefore |
3645 | commas aren't needed to separate the items. (You may have used | |
3646 | different delimiters than the parentheses shown here; braces are also | |
3647 | frequently used.) | |
bbce6d69 | 3648 | |
54310121 | 3649 | You probably wrote something like this: |
bbce6d69 | 3650 | |
774d564b | 3651 | qw! a, b, c !; |
3652 | ||
3653 | which puts literal commas into some of the list items. Write it without | |
3654 | commas if you don't want them to appear in your data: | |
bbce6d69 | 3655 | |
774d564b | 3656 | qw! a b c !; |
bbce6d69 | 3657 | |
a0d0e21e LW |
3658 | =item Possible memory corruption: %s overflowed 3rd argument |
3659 | ||
3660 | (F) An ioctl() or fcntl() returned more than Perl was bargaining for. | |
3661 | Perl guesses a reasonable buffer size, but puts a sentinel byte at the | |
3662 | end of the buffer just in case. This sentinel byte got clobbered, and | |
3663 | Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>. | |
3664 | ||
276b2a0c RGS |
3665 | =item Possible precedence problem on bitwise %c operator |
3666 | ||
3667 | (W precedence) Your program uses a bitwise logical operator in conjunction | |
3668 | with a numeric comparison operator, like this : | |
3669 | ||
3670 | if ($x & $y == 0) { ... } | |
3671 | ||
3672 | This expression is actually equivalent to C<$x & ($y == 0)>, due to the | |
3673 | higher precedence of C<==>. This is probably not what you want. (If you | |
96a925ab YST |
3674 | really meant to write this, disable the warning, or, better, put the |
3675 | parentheses explicitly and write C<$x & ($y == 0)>). | |
276b2a0c | 3676 | |
18623440 PS |
3677 | =item Possible unintended interpolation of %s in string |
3678 | ||
3679 | (W ambiguous) You said something like `@foo' in a double-quoted string | |
32b0a12e AMS |
3680 | but there was no array C<@foo> in scope at the time. If you wanted a |
3681 | literal @foo, then write it as \@foo; otherwise find out what happened | |
3682 | to the array you apparently lost track of. | |
18623440 | 3683 | |
77772344 B |
3684 | =item Possible unintended interpolation of $\ in regex |
3685 | ||
3686 | (W ambiguous) You said something like C<m/$\/> in a regex. | |
3687 | The regex C<m/foo$\s+bar/m> translates to: match the word 'foo', the output | |
8ddb446c | 3688 | record separator (see L<perlvar/$\>) and the letter 's' (one time or more) |
77772344 B |
3689 | followed by the word 'bar'. |
3690 | ||
3691 | If this is what you intended then you can silence the warning by using | |
3692 | C<m/${\}/> (for example: C<m/foo${\}s+bar/>). | |
3693 | ||
3694 | If instead you intended to match the word 'foo' at the end of the line | |
3695 | followed by whitespace and the word 'bar' on the next line then you can use | |
3696 | C<m/$(?)\/> (for example: C<m/foo$(?)\s+bar/>). | |
3697 | ||
a0d0e21e LW |
3698 | =item Precedence problem: open %s should be open(%s) |
3699 | ||
e476b1b5 | 3700 | (S precedence) The old irregular construct |
cb1a09d0 | 3701 | |
a0d0e21e LW |
3702 | open FOO || die; |
3703 | ||
3704 | is now misinterpreted as | |
3705 | ||
3706 | open(FOO || die); | |
3707 | ||
be771a83 GS |
3708 | because of the strict regularization of Perl 5's grammar into unary and |
3709 | list operators. (The old open was a little of both.) You must put | |
3710 | parentheses around the filehandle, or use the new "or" operator instead | |
3711 | of "||". | |
a0d0e21e | 3712 | |
3cdd684c TP |
3713 | =item Premature end of script headers |
3714 | ||
3715 | See Server error. | |
3716 | ||
6df41af2 GS |
3717 | =item printf() on closed filehandle %s |
3718 | ||
be771a83 | 3719 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 3720 | before now. Check your control flow. |
6df41af2 | 3721 | |
9a7dcd9c | 3722 | =item print() on closed filehandle %s |
a0d0e21e | 3723 | |
be771a83 | 3724 | (W closed) The filehandle you're printing on got itself closed sometime |
c289d2f7 | 3725 | before now. Check your control flow. |
a0d0e21e | 3726 | |
6df41af2 | 3727 | =item Process terminated by SIG%s |
a0d0e21e | 3728 | |
6df41af2 GS |
3729 | (W) This is a standard message issued by OS/2 applications, while *nix |
3730 | applications die in silence. It is considered a feature of the OS/2 | |
3731 | port. One can easily disable this by appropriate sighandlers, see | |
3732 | L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT" | |
fecfaeb8 | 3733 | in L<perlos2>. |
a0d0e21e | 3734 | |
327323c1 RGS |
3735 | =item Prototype after '%c' for %s : %s |
3736 | ||
197afce1 | 3737 | (W illegalproto) A character follows % or @ in a prototype. This is useless, |
327323c1 RGS |
3738 | since % and @ gobble the rest of the subroutine arguments. |
3739 | ||
3fe9a6f1 | 3740 | =item Prototype mismatch: %s vs %s |
4633a7c4 | 3741 | |
9a0b3859 | 3742 | (S prototype) The subroutine being declared or defined had previously been |
be771a83 | 3743 | declared or defined with a different function prototype. |
4633a7c4 | 3744 | |
ed9aa3b7 SG |
3745 | =item Prototype not terminated |
3746 | ||
2a6fd447 | 3747 | (F) You've omitted the closing parenthesis in a function prototype |
ed9aa3b7 SG |
3748 | definition. |
3749 | ||
96ebfdd7 RK |
3750 | =item Quantifier follows nothing in regex; marked by <-- HERE in m/%s/ |
3751 | ||
3752 | (F) You started a regular expression with a quantifier. Backslash it if you | |
3753 | meant it literally. The <-- HERE shows in the regular expression about | |
3754 | where the problem was discovered. See L<perlre>. | |
3755 | ||
49704364 | 3756 | =item Quantifier in {,} bigger than %d in regex; marked by <-- HERE in m/%s/ |
9baa0206 | 3757 | |
b45f050a | 3758 | (F) There is currently a limit to the size of the min and max values of the |
7253e4e3 | 3759 | {min,max} construct. The <-- HERE shows in the regular expression about where |
b45f050a | 3760 | the problem was discovered. See L<perlre>. |
9baa0206 | 3761 | |
49704364 | 3762 | =item Quantifier unexpected on zero-length expression; marked by <-- HERE in m/%s/ |
9baa0206 | 3763 | |
b45f050a JF |
3764 | (W regexp) You applied a regular expression quantifier in a place where |
3765 | it makes no sense, such as on a zero-width assertion. Try putting the | |
3766 | quantifier inside the assertion instead. For example, the way to match | |
3767 | "abc" provided that it is followed by three repetitions of "xyz" is | |
3768 | C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>. | |
9baa0206 | 3769 | |
7253e4e3 RK |
3770 | The <-- HERE shows in the regular expression about where the problem was |
3771 | discovered. | |
3772 | ||
89ea2908 GA |
3773 | =item Range iterator outside integer range |
3774 | ||
3775 | (F) One (or both) of the numeric arguments to the range operator ".." | |
3776 | are outside the range which can be represented by integers internally. | |
be771a83 GS |
3777 | One possible workaround is to force Perl to use magical string increment |
3778 | by prepending "0" to your numbers. | |
89ea2908 | 3779 | |
3b7fbd4a SP |
3780 | =item readdir() attempted on invalid dirhandle %s |
3781 | ||
1a147d38 | 3782 | (W io) The dirhandle you're reading from is either closed or not really |
3b7fbd4a SP |
3783 | a dirhandle. Check your control flow. |
3784 | ||
96ebfdd7 RK |
3785 | =item readline() on closed filehandle %s |
3786 | ||
3787 | (W closed) The filehandle you're reading from got itself closed sometime | |
3788 | before now. Check your control flow. | |
3789 | ||
b5fe5ca2 SR |
3790 | =item read() on closed filehandle %s |
3791 | ||
3792 | (W closed) You tried to read from a closed filehandle. | |
3793 | ||
3794 | =item read() on unopened filehandle %s | |
3795 | ||
3796 | (W unopened) You tried to read from a filehandle that was never opened. | |
3797 | ||
6df41af2 GS |
3798 | =item Reallocation too large: %lx |
3799 | ||
3800 | (F) You can't allocate more than 64K on an MS-DOS machine. | |
3801 | ||
4ad56ec9 IZ |
3802 | =item realloc() of freed memory ignored |
3803 | ||
be771a83 GS |
3804 | (S malloc) An internal routine called realloc() on something that had |
3805 | already been freed. | |
4ad56ec9 | 3806 | |
a0d0e21e LW |
3807 | =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch |
3808 | ||
be771a83 GS |
3809 | (F debugging) You can't use the B<-D> option unless the code to produce |
3810 | the desired output is compiled into Perl, which entails some overhead, | |
a0d0e21e LW |
3811 | which is why it's currently left out of your copy. |
3812 | ||
3e0ccd42 | 3813 | =item Recursive inheritance detected in package '%s' |
a0d0e21e | 3814 | |
2c7d6b9c RGS |
3815 | (F) While calculating the method resolution order (MRO) of a package, Perl |
3816 | believes it found an infinite loop in the C<@ISA> hierarchy. This is a | |
3817 | crude check that bails out after 100 levels of C<@ISA> depth. | |
a0d0e21e | 3818 | |
7a4340ed | 3819 | =item Recursive inheritance detected while looking for method %s |
3e0ccd42 | 3820 | |
be771a83 GS |
3821 | (F) More than 100 levels of inheritance were encountered while invoking |
3822 | a method. Probably indicates an unintended loop in your inheritance | |
3823 | hierarchy. | |
3e0ccd42 | 3824 | |
1930e939 TP |
3825 | =item Reference found where even-sized list expected |
3826 | ||
be771a83 GS |
3827 | (W misc) You gave a single reference where Perl was expecting a list |
3828 | with an even number of elements (for assignment to a hash). This usually | |
3829 | means that you used the anon hash constructor when you meant to use | |
3830 | parens. In any case, a hash requires key/value B<pairs>. | |
7b8d334a GS |
3831 | |
3832 | %hash = { one => 1, two => 2, }; # WRONG | |
3833 | %hash = [ qw/ an anon array / ]; # WRONG | |
3834 | %hash = ( one => 1, two => 2, ); # right | |
3835 | %hash = qw( one 1 two 2 ); # also fine | |
3836 | ||
810b8aa5 GS |
3837 | =item Reference is already weak |
3838 | ||
e476b1b5 | 3839 | (W misc) You have attempted to weaken a reference that is already weak. |
810b8aa5 GS |
3840 | Doing so has no effect. |
3841 | ||
a0d0e21e LW |
3842 | =item Reference miscount in sv_replace() |
3843 | ||
be771a83 GS |
3844 | (W internal) The internal sv_replace() function was handed a new SV with |
3845 | a reference count of other than 1. | |
a0d0e21e | 3846 | |
b72d83b2 RGS |
3847 | =item Reference to invalid group 0 |
3848 | ||
3849 | (F) You used C<\g0> or similar in a regular expression. You may refer to | |
3850 | capturing parentheses only with strictly positive integers (normal | |
353c6505 | 3851 | backreferences) or with strictly negative integers (relative |
b72d83b2 RGS |
3852 | backreferences), but using 0 does not make sense. |
3853 | ||
49704364 | 3854 | =item Reference to nonexistent group in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
3855 | |
3856 | (F) You used something like C<\7> in your regular expression, but there are | |
3857 | not at least seven sets of capturing parentheses in the expression. If you | |
e1f120a9 KW |
3858 | wanted to have the character with ordinal 7 inserted into the regular expression, |
3859 | prepend zeroes to make it three digits long: C<\007> | |
9baa0206 | 3860 | |
7253e4e3 | 3861 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a | 3862 | discovered. |
9baa0206 | 3863 | |
c74340f9 YO |
3864 | =item Reference to nonexistent or unclosed group in regex; marked by <-- HERE in m/%s/ |
3865 | ||
2bf803e2 | 3866 | (F) You used something like C<\g{-7}> in your regular expression, but there are |
c74340f9 | 3867 | not at least seven sets of closed capturing parentheses in the expression before |
2bf803e2 | 3868 | where the C<\g{-7}> was located. |
c74340f9 YO |
3869 | |
3870 | The <-- HERE shows in the regular expression about where the problem was | |
3871 | discovered. | |
3872 | ||
1a147d38 YO |
3873 | =item Reference to nonexistent named group in regex; marked by <-- HERE in m/%s/ |
3874 | ||
3875 | (F) You used something like C<\k'NAME'> or C<< \k<NAME> >> in your regular | |
3876 | expression, but there is no corresponding named capturing parentheses such | |
3877 | as C<(?'NAME'...)> or C<(?<NAME>...). Check if the name has been spelled | |
3878 | correctly both in the backreference and the declaration. | |
3879 | ||
3880 | The <-- HERE shows in the regular expression about where the problem was | |
3881 | discovered. | |
3882 | ||
3883 | =item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in m/%s/ | |
3884 | ||
3885 | (F) You used something like C<(?(DEFINE)...|..)> which is illegal. The | |
3886 | most likely cause of this error is that you left out a parenthesis inside | |
3887 | of the C<....> part. | |
3888 | ||
3889 | The <-- HERE shows in the regular expression about where the problem was | |
3890 | discovered. | |
3891 | ||
a0d0e21e LW |
3892 | =item regexp memory corruption |
3893 | ||
3894 | (P) The regular expression engine got confused by what the regular | |
3895 | expression compiler gave it. | |
3896 | ||
b45f050a | 3897 | =item Regexp out of space |
a0d0e21e | 3898 | |
be771a83 GS |
3899 | (P) A "can't happen" error, because safemalloc() should have caught it |
3900 | earlier. | |
a0d0e21e | 3901 | |
a1b95068 WL |
3902 | =item Repeated format line will never terminate (~~ and @# incompatible) |
3903 | ||
d7f8936a | 3904 | (F) Your format contains the ~~ repeat-until-blank sequence and a |
a1b95068 WL |
3905 | numeric field that will never go blank so that the repetition never |
3906 | terminates. You might use ^# instead. See L<perlform>. | |
3907 | ||
b08e453b RB |
3908 | =item Replacement list is longer than search list |
3909 | ||
3910 | (W misc) You have used a replacement list that is longer than the | |
3911 | search list. So the additional elements in the replacement list | |
3912 | are meaningless. | |
3913 | ||
a0d0e21e LW |
3914 | =item Reversed %s= operator |
3915 | ||
be771a83 GS |
3916 | (W syntax) You wrote your assignment operator backwards. The = must |
3917 | always comes last, to avoid ambiguity with subsequent unary operators. | |
a0d0e21e | 3918 | |
abc7ecad SP |
3919 | =item rewinddir() attempted on invalid dirhandle %s |
3920 | ||
3921 | (W io) The dirhandle you tried to do a rewinddir() on is either closed or not | |
3922 | really a dirhandle. Check your control flow. | |
3923 | ||
96ebfdd7 RK |
3924 | =item Scalars leaked: %d |
3925 | ||
3926 | (P) Something went wrong in Perl's internal bookkeeping of scalars: | |
3927 | not all scalar variables were deallocated by the time Perl exited. | |
3928 | What this usually indicates is a memory leak, which is of course bad, | |
3929 | especially if the Perl program is intended to be long-running. | |
3930 | ||
a0d0e21e LW |
3931 | =item Scalar value @%s[%s] better written as $%s[%s] |
3932 | ||
be771a83 GS |
3933 | (W syntax) You've used an array slice (indicated by @) to select a |
3934 | single element of an array. Generally it's better to ask for a scalar | |
3935 | value (indicated by $). The difference is that C<$foo[&bar]> always | |
3936 | behaves like a scalar, both when assigning to it and when evaluating its | |
3937 | argument, while C<@foo[&bar]> behaves like a list when you assign to it, | |
3938 | and provides a list context to its subscript, which can do weird things | |
3939 | if you're expecting only one subscript. | |
a0d0e21e | 3940 | |
748a9306 | 3941 | On the other hand, if you were actually hoping to treat the array |
5f05dabc | 3942 | element as a list, you need to look into how references work, because |
748a9306 LW |
3943 | Perl will not magically convert between scalars and lists for you. See |
3944 | L<perlref>. | |
3945 | ||
a6006777 | 3946 | =item Scalar value @%s{%s} better written as $%s{%s} |
3947 | ||
75b44862 | 3948 | (W syntax) You've used a hash slice (indicated by @) to select a single |
be771a83 GS |
3949 | element of a hash. Generally it's better to ask for a scalar value |
3950 | (indicated by $). The difference is that C<$foo{&bar}> always behaves | |
3951 | like a scalar, both when assigning to it and when evaluating its | |
3952 | argument, while C<@foo{&bar}> behaves like a list when you assign to it, | |
3953 | and provides a list context to its subscript, which can do weird things | |
3954 | if you're expecting only one subscript. | |
3955 | ||
3956 | On the other hand, if you were actually hoping to treat the hash element | |
3957 | as a list, you need to look into how references work, because Perl will | |
3958 | not magically convert between scalars and lists for you. See | |
a6006777 | 3959 | L<perlref>. |
3960 | ||
a0d0e21e LW |
3961 | =item Search pattern not terminated |
3962 | ||
3963 | (F) The lexer couldn't find the final delimiter of a // or m{} | |
3964 | construct. Remember that bracketing delimiters count nesting level. | |
fb73857a | 3965 | Missing the leading C<$> from a variable C<$m> may cause this error. |
a0d0e21e | 3966 | |
0cb1bcd7 | 3967 | Note that since Perl 5.9.0 a // can also be the I<defined-or> |
5d9c98cd JH |
3968 | construct, not just the empty search pattern. Therefore code written |
3969 | in Perl 5.9.0 or later that uses the // as the I<defined-or> can be | |
3970 | misparsed by pre-5.9.0 Perls as a non-terminated search pattern. | |
3971 | ||
25c09cbf SF |
3972 | =item Search pattern not terminated or ternary operator parsed as search pattern |
3973 | ||
3974 | (F) The lexer couldn't find the final delimiter of a C<?PATTERN?> | |
3975 | construct. | |
3976 | ||
3977 | The question mark is also used as part of the ternary operator (as in | |
3978 | C<foo ? 0 : 1>) leading to some ambiguous constructions being wrongly | |
3979 | parsed. One way to disambiguate the parsing is to put parentheses around | |
3980 | the conditional expression, i.e. C<(foo) ? 0 : 1>. | |
3981 | ||
9ddeeac9 | 3982 | =item %sseek() on unopened filehandle |
a0d0e21e | 3983 | |
be771a83 GS |
3984 | (W unopened) You tried to use the seek() or sysseek() function on a |
3985 | filehandle that was either never opened or has since been closed. | |
a0d0e21e | 3986 | |
abc7ecad SP |
3987 | =item seekdir() attempted on invalid dirhandle %s |
3988 | ||
3989 | (W io) The dirhandle you are doing a seekdir() on is either closed or not | |
3990 | really a dirhandle. Check your control flow. | |
3991 | ||
a0d0e21e LW |
3992 | =item select not implemented |
3993 | ||
3994 | (F) This machine doesn't implement the select() system call. | |
3995 | ||
ae21d580 | 3996 | =item Self-ties of arrays and hashes are not supported |
68a4a7e4 | 3997 | |
ae21d580 JH |
3998 | (F) Self-ties are of arrays and hashes are not supported in |
3999 | the current implementation. | |
68a4a7e4 | 4000 | |
6df41af2 | 4001 | =item Semicolon seems to be missing |
a0d0e21e | 4002 | |
75b44862 GS |
4003 | (W semicolon) A nearby syntax error was probably caused by a missing |
4004 | semicolon, or possibly some other missing operator, such as a comma. | |
a0d0e21e LW |
4005 | |
4006 | =item semi-panic: attempt to dup freed string | |
4007 | ||
be771a83 GS |
4008 | (S internal) The internal newSVsv() routine was called to duplicate a |
4009 | scalar that had previously been marked as free. | |
a0d0e21e | 4010 | |
6df41af2 | 4011 | =item sem%s not implemented |
a0d0e21e | 4012 | |
6df41af2 | 4013 | (F) You don't have System V semaphore IPC on your system. |
a0d0e21e | 4014 | |
69282e91 | 4015 | =item send() on closed socket %s |
a0d0e21e | 4016 | |
be771a83 | 4017 | (W closed) The socket you're sending to got itself closed sometime |
c289d2f7 | 4018 | before now. Check your control flow. |
a0d0e21e | 4019 | |
7253e4e3 | 4020 | =item Sequence (? incomplete in regex; marked by <-- HERE in m/%s/ |
7b8d334a | 4021 | |
7253e4e3 | 4022 | (F) A regular expression ended with an incomplete extension (?. The <-- HERE |
b45f050a | 4023 | shows in the regular expression about where the problem was discovered. See |
be771a83 | 4024 | L<perlre>. |
1b1626e4 | 4025 | |
49704364 | 4026 | =item Sequence (?%s...) not implemented in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 4027 | |
b45f050a | 4028 | (F) A proposed regular expression extension has the character reserved but |
7253e4e3 | 4029 | has not yet been written. The <-- HERE shows in the regular expression about |
b45f050a JF |
4030 | where the problem was discovered. See L<perlre>. |
4031 | ||
49704364 | 4032 | =item Sequence (?%s...) not recognized in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 4033 | |
7253e4e3 RK |
4034 | (F) You used a regular expression extension that doesn't make sense. The |
4035 | <-- HERE shows in the regular expression about where the problem was | |
4036 | discovered. See L<perlre>. | |
a0d0e21e | 4037 | |
4a68bf9d | 4038 | =item Sequence \%s... not terminated in regex; marked by <-- HERE in m/%s/ |
1f1031fe YO |
4039 | |
4040 | (F) The regular expression expects a mandatory argument following the escape | |
4041 | sequence and this has been omitted or incorrectly written. | |
4042 | ||
49704364 | 4043 | =item Sequence (?#... not terminated in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
4044 | |
4045 | (F) A regular expression comment must be terminated by a closing | |
7253e4e3 RK |
4046 | parenthesis. Embedded parentheses aren't allowed. The <-- HERE shows in |
4047 | the regular expression about where the problem was discovered. See | |
4048 | L<perlre>. | |
6df41af2 | 4049 | |
96ebfdd7 RK |
4050 | =item Sequence (?{...}) not terminated or not {}-balanced in regex; marked by <-- HERE in m/%s/ |
4051 | ||
4052 | (F) If the contents of a (?{...}) clause contains braces, they must balance | |
4053 | for Perl to properly detect the end of the clause. The <-- HERE shows in | |
4054 | the regular expression about where the problem was discovered. See | |
4055 | L<perlre>. | |
4056 | ||
6df41af2 GS |
4057 | =item 500 Server error |
4058 | ||
4059 | See Server error. | |
4060 | ||
a5f75d66 AD |
4061 | =item Server error |
4062 | ||
3cdd684c | 4063 | This is the error message generally seen in a browser window when trying |
be771a83 GS |
4064 | to run a CGI program (including SSI) over the web. The actual error text |
4065 | varies widely from server to server. The most frequently-seen variants | |
4066 | are "500 Server error", "Method (something) not permitted", "Document | |
4067 | contains no data", "Premature end of script headers", and "Did not | |
4068 | produce a valid header". | |
9607fc9c | 4069 | |
4070 | B<This is a CGI error, not a Perl error>. | |
4071 | ||
be771a83 GS |
4072 | You need to make sure your script is executable, is accessible by the |
4073 | user CGI is running the script under (which is probably not the user | |
4074 | account you tested it under), does not rely on any environment variables | |
4075 | (like PATH) from the user it isn't running under, and isn't in a | |
4076 | location where the CGI server can't find it, basically, more or less. | |
4077 | Please see the following for more information: | |
9607fc9c | 4078 | |
06a5f41f JH |
4079 | http://www.perl.org/CGI_MetaFAQ.html |
4080 | http://www.htmlhelp.org/faq/cgifaq.html | |
4081 | http://www.w3.org/Security/Faq/ | |
a5f75d66 | 4082 | |
be94a901 GS |
4083 | You should also look at L<perlfaq9>. |
4084 | ||
a0d0e21e LW |
4085 | =item setegid() not implemented |
4086 | ||
be771a83 GS |
4087 | (F) You tried to assign to C<$)>, and your operating system doesn't |
4088 | support the setegid() system call (or equivalent), or at least Configure | |
4089 | didn't think so. | |
a0d0e21e LW |
4090 | |
4091 | =item seteuid() not implemented | |
4092 | ||
be771a83 GS |
4093 | (F) You tried to assign to C<< $> >>, and your operating system doesn't |
4094 | support the seteuid() system call (or equivalent), or at least Configure | |
4095 | didn't think so. | |
a0d0e21e | 4096 | |
81777298 GS |
4097 | =item setpgrp can't take arguments |
4098 | ||
be771a83 GS |
4099 | (F) Your system has the setpgrp() from BSD 4.2, which takes no |
4100 | arguments, unlike POSIX setpgid(), which takes a process ID and process | |
4101 | group ID. | |
81777298 | 4102 | |
a0d0e21e LW |
4103 | =item setrgid() not implemented |
4104 | ||
be771a83 GS |
4105 | (F) You tried to assign to C<$(>, and your operating system doesn't |
4106 | support the setrgid() system call (or equivalent), or at least Configure | |
4107 | didn't think so. | |
a0d0e21e LW |
4108 | |
4109 | =item setruid() not implemented | |
4110 | ||
be771a83 GS |
4111 | (F) You tried to assign to C<$<>, and your operating system doesn't |
4112 | support the setruid() system call (or equivalent), or at least Configure | |
4113 | didn't think so. | |
a0d0e21e | 4114 | |
6df41af2 GS |
4115 | =item setsockopt() on closed socket %s |
4116 | ||
be771a83 GS |
4117 | (W closed) You tried to set a socket option on a closed socket. Did you |
4118 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
4119 | L<perlfunc/setsockopt>. |
4120 | ||
a0d0e21e LW |
4121 | =item Setuid/gid script is writable by world |
4122 | ||
be771a83 GS |
4123 | (F) The setuid emulator won't run a script that is writable by the |
4124 | world, because the world might have written on it already. | |
a0d0e21e | 4125 | |
d504a7a1 RGS |
4126 | =item Setuid script not plain file |
4127 | ||
4128 | (F) The setuid emulator won't run a script that isn't read from a file, | |
4129 | but from a socket, a pipe or another device. | |
4130 | ||
a0d0e21e LW |
4131 | =item shm%s not implemented |
4132 | ||
4133 | (F) You don't have System V shared memory IPC on your system. | |
4134 | ||
984200d0 YST |
4135 | =item !=~ should be !~ |
4136 | ||
4137 | (W syntax) The non-matching operator is !~, not !=~. !=~ will be | |
4138 | interpreted as the != (numeric not equal) and ~ (1's complement) | |
4139 | operators: probably not what you intended. | |
4140 | ||
6df41af2 GS |
4141 | =item <> should be quotes |
4142 | ||
4143 | (F) You wrote C<< require <file> >> when you should have written | |
4144 | C<require 'file'>. | |
4145 | ||
4146 | =item /%s/ should probably be written as "%s" | |
4147 | ||
4148 | (W syntax) You have used a pattern where Perl expected to find a string, | |
be771a83 GS |
4149 | as in the first argument to C<join>. Perl will treat the true or false |
4150 | result of matching the pattern against $_ as the string, which is | |
4151 | probably not what you had in mind. | |
6df41af2 | 4152 | |
69282e91 | 4153 | =item shutdown() on closed socket %s |
a0d0e21e | 4154 | |
75b44862 GS |
4155 | (W closed) You tried to do a shutdown on a closed socket. Seems a bit |
4156 | superfluous. | |
a0d0e21e | 4157 | |
f86702cc | 4158 | =item SIG%s handler "%s" not defined |
a0d0e21e | 4159 | |
be771a83 GS |
4160 | (W signal) The signal handler named in %SIG doesn't, in fact, exist. |
4161 | Perhaps you put it into the wrong package? | |
a0d0e21e | 4162 | |
229c18ce RGS |
4163 | =item Smart matching a non-overloaded object breaks encapsulation |
4164 | ||
4165 | (F) You should not use the C<~~> operator on an object that does not | |
4166 | overload it: Perl refuses to use the object's underlying structure for | |
4167 | the smart match. | |
4168 | ||
a0d0e21e LW |
4169 | =item sort is now a reserved word |
4170 | ||
4171 | (F) An ancient error message that almost nobody ever runs into anymore. | |
4172 | But before sort was a keyword, people sometimes used it as a filehandle. | |
4173 | ||
a0d0e21e LW |
4174 | =item Sort subroutine didn't return single value |
4175 | ||
4176 | (F) A sort comparison subroutine may not return a list value with more | |
4177 | or less than one element. See L<perlfunc/sort>. | |
4178 | ||
8cbc2e3b JH |
4179 | =item splice() offset past end of array |
4180 | ||
4181 | (W misc) You attempted to specify an offset that was past the end of | |
4182 | the array passed to splice(). Splicing will instead commence at the end | |
4183 | of the array, rather than past it. If this isn't what you want, try | |
4184 | explicitly pre-extending the array by assigning $#array = $offset. See | |
4185 | L<perlfunc/splice>. | |
4186 | ||
a0d0e21e LW |
4187 | =item Split loop |
4188 | ||
be771a83 GS |
4189 | (P) The split was looping infinitely. (Obviously, a split shouldn't |
4190 | iterate more times than there are characters of input, which is what | |
4191 | happened.) See L<perlfunc/split>. | |
a0d0e21e | 4192 | |
a0d0e21e LW |
4193 | =item Statement unlikely to be reached |
4194 | ||
be771a83 GS |
4195 | (W exec) You did an exec() with some statement after it other than a |
4196 | die(). This is almost always an error, because exec() never returns | |
4197 | unless there was a failure. You probably wanted to use system() | |
4198 | instead, which does return. To suppress this warning, put the exec() in | |
4199 | a block by itself. | |
a0d0e21e | 4200 | |
9ddeeac9 | 4201 | =item stat() on unopened filehandle %s |
6df41af2 | 4202 | |
355b1299 JH |
4203 | (W unopened) You tried to use the stat() function on a filehandle that |
4204 | was either never opened or has since been closed. | |
6df41af2 | 4205 | |
fe13d51d | 4206 | =item Stub found while resolving method "%s" overloading "%s" in package "%s" |
e7ea3e70 | 4207 | |
be771a83 GS |
4208 | (P) Overloading resolution over @ISA tree may be broken by importation |
4209 | stubs. Stubs should never be implicitly created, but explicit calls to | |
4210 | C<can> may break this. | |
e7ea3e70 | 4211 | |
a0d0e21e LW |
4212 | =item Subroutine %s redefined |
4213 | ||
e476b1b5 | 4214 | (W redefine) You redefined a subroutine. To suppress this warning, say |
a0d0e21e LW |
4215 | |
4216 | { | |
271595cc | 4217 | no warnings 'redefine'; |
a0d0e21e LW |
4218 | eval "sub name { ... }"; |
4219 | } | |
4220 | ||
4221 | =item Substitution loop | |
4222 | ||
be771a83 GS |
4223 | (P) The substitution was looping infinitely. (Obviously, a substitution |
4224 | shouldn't iterate more times than there are characters of input, which | |
4225 | is what happened.) See the discussion of substitution in | |
5d44bfff | 4226 | L<perlop/"Regexp Quote-Like Operators">. |
a0d0e21e LW |
4227 | |
4228 | =item Substitution pattern not terminated | |
4229 | ||
d1be9408 | 4230 | (F) The lexer couldn't find the interior delimiter of an s/// or s{}{} |
a0d0e21e | 4231 | construct. Remember that bracketing delimiters count nesting level. |
fb73857a | 4232 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
4233 | |
4234 | =item Substitution replacement not terminated | |
4235 | ||
d1be9408 | 4236 | (F) The lexer couldn't find the final delimiter of an s/// or s{}{} |
a0d0e21e | 4237 | construct. Remember that bracketing delimiters count nesting level. |
fb73857a | 4238 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
4239 | |
4240 | =item substr outside of string | |
4241 | ||
be771a83 GS |
4242 | (W substr),(F) You tried to reference a substr() that pointed outside of |
4243 | a string. That is, the absolute value of the offset was larger than the | |
4244 | length of the string. See L<perlfunc/substr>. This warning is fatal if | |
4245 | substr is used in an lvalue context (as the left hand side of an | |
4246 | assignment or as a subroutine argument for example). | |
a0d0e21e | 4247 | |
bf1320bf RGS |
4248 | =item sv_upgrade from type %d down to type %d |
4249 | ||
4250 | (P) Perl tried to force the upgrade an SV to a type which was actually | |
4251 | inferior to its current type. | |
4252 | ||
49704364 | 4253 | =item Switch (?(condition)... contains too many branches in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
4254 | |
4255 | (F) A (?(condition)if-clause|else-clause) construct can have at most two | |
4256 | branches (the if-clause and the else-clause). If you want one or both to | |
4257 | contain alternation, such as using C<this|that|other>, enclose it in | |
4258 | clustering parentheses: | |
4259 | ||
4260 | (?(condition)(?:this|that|other)|else-clause) | |
4261 | ||
7253e4e3 | 4262 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a JF |
4263 | discovered. See L<perlre>. |
4264 | ||
49704364 | 4265 | =item Switch condition not recognized in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
4266 | |
4267 | (F) If the argument to the (?(...)if-clause|else-clause) construct is a | |
7253e4e3 | 4268 | number, it can be only a number. The <-- HERE shows in the regular expression |
b45f050a JF |
4269 | about where the problem was discovered. See L<perlre>. |
4270 | ||
85ab1d1d JH |
4271 | =item switching effective %s is not implemented |
4272 | ||
be771a83 GS |
4273 | (F) While under the C<use filetest> pragma, we cannot switch the real |
4274 | and effective uids or gids. | |
85ab1d1d | 4275 | |
2f7da168 RK |
4276 | =item %s syntax |
4277 | ||
4278 | (F) The final summary message when a C<perl -c> succeeds. | |
4279 | ||
a0d0e21e LW |
4280 | =item syntax error |
4281 | ||
4282 | (F) Probably means you had a syntax error. Common reasons include: | |
4283 | ||
4284 | A keyword is misspelled. | |
4285 | A semicolon is missing. | |
4286 | A comma is missing. | |
4287 | An opening or closing parenthesis is missing. | |
4288 | An opening or closing brace is missing. | |
4289 | A closing quote is missing. | |
4290 | ||
4291 | Often there will be another error message associated with the syntax | |
4292 | error giving more information. (Sometimes it helps to turn on B<-w>.) | |
4293 | The error message itself often tells you where it was in the line when | |
4294 | it decided to give up. Sometimes the actual error is several tokens | |
5f05dabc | 4295 | before this, because Perl is good at understanding random input. |
a0d0e21e LW |
4296 | Occasionally the line number may be misleading, and once in a blue moon |
4297 | the only way to figure out what's triggering the error is to call | |
4298 | C<perl -c> repeatedly, chopping away half the program each time to see | |
be771a83 GS |
4299 | if the error went away. Sort of the cybernetic version of S<20 |
4300 | questions>. | |
a0d0e21e | 4301 | |
cb1a09d0 AD |
4302 | =item syntax error at line %d: `%s' unexpected |
4303 | ||
be771a83 GS |
4304 | (A) You've accidentally run your script through the Bourne shell instead |
4305 | of Perl. Check the #! line, or manually feed your script into Perl | |
4306 | yourself. | |
cb1a09d0 | 4307 | |
25f58aea PN |
4308 | =item syntax error in file %s at line %d, next 2 tokens "%s" |
4309 | ||
4310 | (F) This error is likely to occur if you run a perl5 script through | |
4311 | a perl4 interpreter, especially if the next 2 tokens are "use strict" | |
4312 | or "my $var" or "our $var". | |
4313 | ||
b5fe5ca2 SR |
4314 | =item sysread() on closed filehandle %s |
4315 | ||
4316 | (W closed) You tried to read from a closed filehandle. | |
4317 | ||
4318 | =item sysread() on unopened filehandle %s | |
4319 | ||
4320 | (W unopened) You tried to read from a filehandle that was never opened. | |
4321 | ||
6087ac44 | 4322 | =item System V %s is not implemented on this machine |
a0d0e21e | 4323 | |
6087ac44 JH |
4324 | (F) You tried to do something with a function beginning with "sem", |
4325 | "shm", or "msg" but that System V IPC is not implemented in your | |
4326 | machine. In some machines the functionality can exist but be | |
4327 | unconfigured. Consult your system support. | |
a0d0e21e | 4328 | |
69282e91 | 4329 | =item syswrite() on closed filehandle %s |
a0d0e21e | 4330 | |
be771a83 | 4331 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 4332 | before now. Check your control flow. |
a0d0e21e | 4333 | |
96ebfdd7 RK |
4334 | =item C<-T> and C<-B> not implemented on filehandles |
4335 | ||
4336 | (F) Perl can't peek at the stdio buffer of filehandles when it doesn't | |
4337 | know about your kind of stdio. You'll have to use a filename instead. | |
4338 | ||
fc36a67e | 4339 | =item Target of goto is too deeply nested |
4340 | ||
be771a83 GS |
4341 | (F) You tried to use C<goto> to reach a label that was too deeply nested |
4342 | for Perl to reach. Perl is doing you a favor by refusing. | |
fc36a67e | 4343 | |
9ddeeac9 | 4344 | =item tell() on unopened filehandle |
a0d0e21e | 4345 | |
be771a83 GS |
4346 | (W unopened) You tried to use the tell() function on a filehandle that |
4347 | was either never opened or has since been closed. | |
a0d0e21e | 4348 | |
abc7ecad SP |
4349 | =item telldir() attempted on invalid dirhandle %s |
4350 | ||
4351 | (W io) The dirhandle you tried to telldir() is either closed or not really | |
4352 | a dirhandle. Check your control flow. | |
4353 | ||
a0d0e21e LW |
4354 | =item That use of $[ is unsupported |
4355 | ||
be771a83 GS |
4356 | (F) Assignment to C<$[> is now strictly circumscribed, and interpreted |
4357 | as a compiler directive. You may say only one of | |
a0d0e21e LW |
4358 | |
4359 | $[ = 0; | |
4360 | $[ = 1; | |
4361 | ... | |
4362 | local $[ = 0; | |
4363 | local $[ = 1; | |
4364 | ... | |
4365 | ||
be771a83 GS |
4366 | This is to prevent the problem of one module changing the array base out |
4367 | from under another module inadvertently. See L<perlvar/$[>. | |
a0d0e21e | 4368 | |
f86702cc | 4369 | =item The crypt() function is unimplemented due to excessive paranoia |
a0d0e21e LW |
4370 | |
4371 | (F) Configure couldn't find the crypt() function on your machine, | |
4372 | probably because your vendor didn't supply it, probably because they | |
8b1a09fc | 4373 | think the U.S. Government thinks it's a secret, or at least that they |
a0d0e21e LW |
4374 | will continue to pretend that it is. And if you quote me on that, I |
4375 | will deny it. | |
4376 | ||
6df41af2 GS |
4377 | =item The %s function is unimplemented |
4378 | ||
4379 | The function indicated isn't implemented on this architecture, according | |
4380 | to the probings of Configure. | |
4381 | ||
5e1c7ca2 | 4382 | =item The stat preceding %s wasn't an lstat |
a0d0e21e | 4383 | |
be771a83 GS |
4384 | (F) It makes no sense to test the current stat buffer for symbolic |
4385 | linkhood if the last stat that wrote to the stat buffer already went | |
4386 | past the symlink to get to the real file. Use an actual filename | |
4387 | instead. | |
a0d0e21e | 4388 | |
371fce9b DM |
4389 | =item The 'unique' attribute may only be applied to 'our' variables |
4390 | ||
1108974d | 4391 | (F) This attribute was never supported on C<my> or C<sub> declarations. |
371fce9b | 4392 | |
437784d6 | 4393 | =item This Perl can't reset CRTL environ elements (%s) |
f675dbe5 CB |
4394 | |
4395 | =item This Perl can't set CRTL environ elements (%s=%s) | |
4396 | ||
75b44862 | 4397 | (W internal) Warnings peculiar to VMS. You tried to change or delete an |
be771a83 GS |
4398 | element of the CRTL's internal environ array, but your copy of Perl |
4399 | wasn't built with a CRTL that contained the setenv() function. You'll | |
4400 | need to rebuild Perl with a CRTL that does, or redefine | |
4401 | F<PERL_ENV_TABLES> (see L<perlvms>) so that the environ array isn't the | |
4402 | target of the change to | |
f675dbe5 CB |
4403 | %ENV which produced the warning. |
4404 | ||
6b3c7930 JH |
4405 | =item thread failed to start: %s |
4406 | ||
4447dfc1 | 4407 | (W threads)(S) The entry point function of threads->create() failed for some reason. |
6b3c7930 | 4408 | |
a0d0e21e LW |
4409 | =item times not implemented |
4410 | ||
be771a83 GS |
4411 | (F) Your version of the C library apparently doesn't do times(). I |
4412 | suspect you're not running on Unix. | |
a0d0e21e | 4413 | |
6d3b25aa RGS |
4414 | =item "-T" is on the #! line, it must also be used on the command line |
4415 | ||
4416 | (X) The #! line (or local equivalent) in a Perl script contains the | |
fe13d51d | 4417 | B<-T> option (or the B<-t> option), but Perl was not invoked with B<-T> in its command line. |
6d3b25aa RGS |
4418 | This is an error because, by the time Perl discovers a B<-T> in a |
4419 | script, it's too late to properly taint everything from the environment. | |
4420 | So Perl gives up. | |
4421 | ||
4422 | If the Perl script is being executed as a command using the #! | |
4423 | mechanism (or its local equivalent), this error can usually be fixed by | |
fe13d51d JM |
4424 | editing the #! line so that the B<-%c> option is a part of Perl's first |
4425 | argument: e.g. change C<perl -n -%c> to C<perl -%c -n>. | |
6d3b25aa RGS |
4426 | |
4427 | If the Perl script is being executed as C<perl scriptname>, then the | |
fe13d51d | 4428 | B<-%c> option must appear on the command line: C<perl -%c scriptname>. |
6d3b25aa | 4429 | |
3a2263fe RGS |
4430 | =item To%s: illegal mapping '%s' |
4431 | ||
4432 | (F) You tried to define a customized To-mapping for lc(), lcfirst, | |
4433 | uc(), or ucfirst() (or their string-inlined versions), but you | |
4434 | specified an illegal mapping. | |
4435 | See L<perlunicode/"User-Defined Character Properties">. | |
4436 | ||
49704364 WL |
4437 | =item Too deeply nested ()-groups |
4438 | ||
1a147d38 | 4439 | (F) Your template contains ()-groups with a ridiculously deep nesting level. |
49704364 | 4440 | |
a0d0e21e LW |
4441 | =item Too few args to syscall |
4442 | ||
4443 | (F) There has to be at least one argument to syscall() to specify the | |
4444 | system call to call, silly dilly. | |
4445 | ||
96ebfdd7 RK |
4446 | =item Too late for "-%s" option |
4447 | ||
4448 | (X) The #! line (or local equivalent) in a Perl script contains the | |
4ba71d51 FC |
4449 | B<-M>, B<-m> or B<-C> option. |
4450 | ||
4451 | In the case of B<-M> and B<-m>, this is an error because those options are | |
4452 | not intended for use inside scripts. Use the C<use> pragma instead. | |
4453 | ||
4454 | The B<-C> option only works if it is specified on the command line as well | |
4455 | (with the same sequence of letters or numbers following). Either specify | |
4456 | this option on the command line, or, if your system supports it, make your | |
4457 | script executable and run it directly instead of passing it to perl. | |
96ebfdd7 | 4458 | |
ddda08b7 GS |
4459 | =item Too late to run %s block |
4460 | ||
4461 | (W void) A CHECK or INIT block is being defined during run time proper, | |
4462 | when the opportunity to run them has already passed. Perhaps you are | |
be771a83 GS |
4463 | loading a file with C<require> or C<do> when you should be using C<use> |
4464 | instead. Or perhaps you should put the C<require> or C<do> inside a | |
4465 | BEGIN block. | |
ddda08b7 | 4466 | |
a0d0e21e LW |
4467 | =item Too many args to syscall |
4468 | ||
5f05dabc | 4469 | (F) Perl supports a maximum of only 14 args to syscall(). |
a0d0e21e LW |
4470 | |
4471 | =item Too many arguments for %s | |
4472 | ||
4473 | (F) The function requires fewer arguments than you specified. | |
4474 | ||
6df41af2 GS |
4475 | =item Too many )'s |
4476 | ||
49704364 WL |
4477 | (A) You've accidentally run your script through B<csh> instead of Perl. |
4478 | Check the #! line, or manually feed your script into Perl yourself. | |
4479 | ||
8c40cb74 NC |
4480 | =item Too many ('s |
4481 | ||
be771a83 GS |
4482 | (A) You've accidentally run your script through B<csh> instead of Perl. |
4483 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 4484 | |
7253e4e3 | 4485 | =item Trailing \ in regex m/%s/ |
a0d0e21e | 4486 | |
be771a83 GS |
4487 | (F) The regular expression ends with an unbackslashed backslash. |
4488 | Backslash it. See L<perlre>. | |
a0d0e21e | 4489 | |
2c268ad5 | 4490 | =item Transliteration pattern not terminated |
a0d0e21e LW |
4491 | |
4492 | (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] | |
fb73857a | 4493 | or y/// or y[][] construct. Missing the leading C<$> from variables |
4494 | C<$tr> or C<$y> may cause this error. | |
a0d0e21e | 4495 | |
2c268ad5 | 4496 | =item Transliteration replacement not terminated |
a0d0e21e | 4497 | |
6a36df5d YST |
4498 | (F) The lexer couldn't find the final delimiter of a tr///, tr[][], |
4499 | y/// or y[][] construct. | |
a0d0e21e | 4500 | |
96ebfdd7 RK |
4501 | =item '%s' trapped by operation mask |
4502 | ||
4503 | (F) You tried to use an operator from a Safe compartment in which it's | |
4504 | disallowed. See L<Safe>. | |
4505 | ||
a0d0e21e LW |
4506 | =item truncate not implemented |
4507 | ||
4508 | (F) Your machine doesn't implement a file truncation mechanism that | |
4509 | Configure knows about. | |
4510 | ||
4511 | =item Type of arg %d to %s must be %s (not %s) | |
4512 | ||
4513 | (F) This function requires the argument in that position to be of a | |
8b1a09fc | 4514 | certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be |
4515 | %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the | |
a0d0e21e LW |
4516 | {EXPR} forms as an explicit dereference. See L<perlref>. |
4517 | ||
eec2d3df GS |
4518 | =item umask not implemented |
4519 | ||
be771a83 GS |
4520 | (F) Your machine doesn't implement the umask function and you tried to |
4521 | use it to restrict permissions for yourself (EXPR & 0700). | |
a0d0e21e | 4522 | |
4633a7c4 LW |
4523 | =item Unable to create sub named "%s" |
4524 | ||
4525 | (F) You attempted to create or access a subroutine with an illegal name. | |
4526 | ||
a0d0e21e LW |
4527 | =item Unbalanced context: %d more PUSHes than POPs |
4528 | ||
be771a83 GS |
4529 | (W internal) The exit code detected an internal inconsistency in how |
4530 | many execution contexts were entered and left. | |
a0d0e21e LW |
4531 | |
4532 | =item Unbalanced saves: %d more saves than restores | |
4533 | ||
be771a83 GS |
4534 | (W internal) The exit code detected an internal inconsistency in how |
4535 | many values were temporarily localized. | |
a0d0e21e LW |
4536 | |
4537 | =item Unbalanced scopes: %d more ENTERs than LEAVEs | |
4538 | ||
be771a83 GS |
4539 | (W internal) The exit code detected an internal inconsistency in how |
4540 | many blocks were entered and left. | |
a0d0e21e LW |
4541 | |
4542 | =item Unbalanced tmps: %d more allocs than frees | |
4543 | ||
be771a83 GS |
4544 | (W internal) The exit code detected an internal inconsistency in how |
4545 | many mortal scalars were allocated and freed. | |
a0d0e21e LW |
4546 | |
4547 | =item Undefined format "%s" called | |
4548 | ||
4549 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
4550 | another package? See L<perlform>. | |
4551 | ||
4552 | =item Undefined sort subroutine "%s" called | |
4553 | ||
be771a83 GS |
4554 | (F) The sort comparison routine specified doesn't seem to exist. |
4555 | Perhaps it's in a different package? See L<perlfunc/sort>. | |
a0d0e21e LW |
4556 | |
4557 | =item Undefined subroutine &%s called | |
4558 | ||
be771a83 GS |
4559 | (F) The subroutine indicated hasn't been defined, or if it was, it has |
4560 | since been undefined. | |
a0d0e21e LW |
4561 | |
4562 | =item Undefined subroutine called | |
4563 | ||
4564 | (F) The anonymous subroutine you're trying to call hasn't been defined, | |
4565 | or if it was, it has since been undefined. | |
4566 | ||
4567 | =item Undefined subroutine in sort | |
4568 | ||
be771a83 GS |
4569 | (F) The sort comparison routine specified is declared but doesn't seem |
4570 | to have been defined yet. See L<perlfunc/sort>. | |
a0d0e21e | 4571 | |
4633a7c4 LW |
4572 | =item Undefined top format "%s" called |
4573 | ||
4574 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
4575 | another package? See L<perlform>. | |
4576 | ||
20408e3c GS |
4577 | =item Undefined value assigned to typeglob |
4578 | ||
be771a83 GS |
4579 | (W misc) An undefined value was assigned to a typeglob, a la |
4580 | C<*foo = undef>. This does nothing. It's possible that you really mean | |
4581 | C<undef *foo>. | |
20408e3c | 4582 | |
6df41af2 GS |
4583 | =item %s: Undefined variable |
4584 | ||
be771a83 GS |
4585 | (A) You've accidentally run your script through B<csh> instead of Perl. |
4586 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 4587 | |
a0d0e21e LW |
4588 | =item unexec of %s into %s failed! |
4589 | ||
4590 | (F) The unexec() routine failed for some reason. See your local FSF | |
4591 | representative, who probably put it there in the first place. | |
4592 | ||
6f6ac1de | 4593 | =item Unicode non-character %s is illegal for interchange |
3d401ffb | 4594 | |
6f6ac1de RGS |
4595 | (W utf8) Certain codepoints, such as U+FFFE and U+FFFF, are defined by the |
4596 | Unicode standard to be non-characters. Those are legal codepoints, but are | |
4597 | reserved for internal use; so, applications shouldn't attempt to exchange | |
5b311467 KW |
4598 | them. In some cases, this message is also given if you use a codepoint that |
4599 | isn't in Unicode--that is it is above the legal maximum of U+10FFFF. These | |
4600 | aren't legal at all in Unicode, so they are illegal for interchange, but can be | |
4601 | used internally in a Perl program. If you know what you are doing you can turn | |
4602 | off this warning by C<no warnings 'utf8';>. | |
b45f050a | 4603 | |
a0d0e21e LW |
4604 | =item Unknown BYTEORDER |
4605 | ||
be771a83 GS |
4606 | (F) There are no byte-swapping functions for a machine with this byte |
4607 | order. | |
a0d0e21e | 4608 | |
6170680b IZ |
4609 | =item Unknown open() mode '%s' |
4610 | ||
437784d6 | 4611 | (F) The second argument of 3-argument open() is not among the list |
c47ff5f1 | 4612 | of valid modes: C<< < >>, C<< > >>, C<<< >> >>>, C<< +< >>, |
488dad83 | 4613 | C<< +> >>, C<<< +>> >>>, C<-|>, C<|->, C<< <& >>, C<< >& >>. |
6170680b | 4614 | |
b4581f09 JH |
4615 | =item Unknown PerlIO layer "%s" |
4616 | ||
4617 | (W layer) An attempt was made to push an unknown layer onto the Perl I/O | |
4618 | system. (Layers take care of transforming data between external and | |
4619 | internal representations.) Note that some layers, such as C<mmap>, | |
4620 | are not supported in all environments. If your program didn't | |
4621 | explicitly request the failing operation, it may be the result of the | |
4622 | value of the environment variable PERLIO. | |
4623 | ||
f675dbe5 CB |
4624 | =item Unknown process %x sent message to prime_env_iter: %s |
4625 | ||
4626 | (P) An error peculiar to VMS. Perl was reading values for %ENV before | |
4627 | iterating over it, and someone else stuck a message in the stream of | |
4628 | data Perl expected. Someone's very confused, or perhaps trying to | |
4629 | subvert Perl's population of %ENV for nefarious purposes. | |
a05d7ebb | 4630 | |
2f7da168 RK |
4631 | =item Unknown "re" subpragma '%s' (known ones are: %s) |
4632 | ||
4633 | You tried to use an unknown subpragma of the "re" pragma. | |
4634 | ||
96ebfdd7 RK |
4635 | =item Unknown switch condition (?(%.2s in regex; marked by <-- HERE in m/%s/ |
4636 | ||
4637 | (F) The condition part of a (?(condition)if-clause|else-clause) construct | |
4638 | is not known. The condition may be lookahead or lookbehind (the condition | |
4639 | is true if the lookahead or lookbehind is true), a (?{...}) construct (the | |
4640 | condition is true if the code evaluates to a true value), or a number (the | |
4641 | condition is true if the set of capturing parentheses named by the number | |
4642 | matched). | |
4643 | ||
4644 | The <-- HERE shows in the regular expression about where the problem was | |
4645 | discovered. See L<perlre>. | |
4646 | ||
a05d7ebb JH |
4647 | =item Unknown Unicode option letter '%c' |
4648 | ||
4649 | You specified an unknown Unicode option. See L<perlrun> documentation | |
4650 | of the C<-C> switch for the list of known options. | |
4651 | ||
4652 | =item Unknown Unicode option value %x | |
4653 | ||
4654 | You specified an unknown Unicode option. See L<perlrun> documentation | |
4655 | of the C<-C> switch for the list of known options. | |
f675dbe5 | 4656 | |
3d1a39c8 RGS |
4657 | =item Unknown warnings category '%s' |
4658 | ||
4659 | (F) An error issued by the C<warnings> pragma. You specified a warnings | |
4660 | category that is unknown to perl at this point. | |
4661 | ||
4662 | Note that if you want to enable a warnings category registered by a module | |
4663 | (e.g. C<use warnings 'File::Find'>), you must have imported this module | |
e2e6a0f1 YO |
4664 | |
4665 | =item Unknown verb pattern '%s' in regex; marked by <-- HERE in m/%s/ | |
4666 | ||
4667 | (F) You either made a typo or have incorrectly put a C<*> quantifier | |
4668 | after an open brace in your pattern. Check the pattern and review | |
4669 | L<perlre> for details on legal verb patterns. | |
4670 | ||
3d1a39c8 RGS |
4671 | first. |
4672 | ||
7253e4e3 | 4673 | =item unmatched [ in regex; marked by <-- HERE in m/%s/ |
6df41af2 | 4674 | |
380a0633 | 4675 | (F) The brackets around a character class must match. If you wish to |
be771a83 | 4676 | include a closing bracket in a character class, backslash it or put it |
7253e4e3 RK |
4677 | first. The <-- HERE shows in the regular expression about where the problem |
4678 | was discovered. See L<perlre>. | |
6df41af2 | 4679 | |
7253e4e3 | 4680 | =item unmatched ( in regex; marked by <-- HERE in m/%s/ |
a0d0e21e LW |
4681 | |
4682 | (F) Unbackslashed parentheses must always be balanced in regular | |
7253e4e3 RK |
4683 | expressions. If you're a vi user, the % key is valuable for finding the |
4684 | matching parenthesis. The <-- HERE shows in the regular expression about | |
4685 | where the problem was discovered. See L<perlre>. | |
a0d0e21e | 4686 | |
d98d5fff | 4687 | =item Unmatched right %s bracket |
a0d0e21e | 4688 | |
be771a83 GS |
4689 | (F) The lexer counted more closing curly or square brackets than opening |
4690 | ones, so you're probably missing a matching opening bracket. As a | |
4691 | general rule, you'll find the missing one (so to speak) near the place | |
4692 | you were last editing. | |
a0d0e21e | 4693 | |
a0d0e21e LW |
4694 | =item Unquoted string "%s" may clash with future reserved word |
4695 | ||
be771a83 GS |
4696 | (W reserved) You used a bareword that might someday be claimed as a |
4697 | reserved word. It's best to put such a word in quotes, or capitalize it | |
4698 | somehow, or insert an underbar into it. You might also declare it as a | |
4699 | subroutine. | |
a0d0e21e | 4700 | |
b1fc3636 | 4701 | =item Unrecognized character %s; marked by <-- HERE after %s near column %d |
a0d0e21e | 4702 | |
54310121 | 4703 | (F) The Perl parser has no idea what to do with the specified character |
b1fc3636 | 4704 | in your Perl script (or eval) near the specified column. Perhaps you tried |
356c7adf | 4705 | to run a compressed script, a binary program, or a directory as a Perl program. |
a0d0e21e | 4706 | |
4a68bf9d | 4707 | =item Unrecognized escape \%c in character class passed through in regex; marked by <-- HERE in m/%s/ |
6df41af2 | 4708 | |
be771a83 GS |
4709 | (W regexp) You used a backslash-character combination which is not |
4710 | recognized by Perl inside character classes. The character was | |
b224edc1 | 4711 | understood literally, but this may change in a future version of Perl. |
2628b4e0 TS |
4712 | The <-- HERE shows in the regular expression about where the |
4713 | escape was discovered. | |
6df41af2 | 4714 | |
4a68bf9d | 4715 | =item Unrecognized escape \%c passed through |
2f7da168 | 4716 | |
2628b4e0 | 4717 | (W misc) You used a backslash-character combination which is not |
b224edc1 KW |
4718 | recognized by Perl. The character was understood literally, but this may |
4719 | change in a future version of Perl. | |
2f7da168 | 4720 | |
4a68bf9d | 4721 | =item Unrecognized escape \%c passed through in regex; marked by <-- HERE in m/%s/ |
6df41af2 | 4722 | |
be771a83 | 4723 | (W regexp) You used a backslash-character combination which is not |
b224edc1 KW |
4724 | recognized by Perl. The character was understood literally, but this may |
4725 | change in a future version of Perl. | |
2628b4e0 | 4726 | The <-- HERE shows in the regular expression about where the |
7253e4e3 | 4727 | escape was discovered. |
6df41af2 | 4728 | |
a0d0e21e LW |
4729 | =item Unrecognized signal name "%s" |
4730 | ||
be771a83 GS |
4731 | (F) You specified a signal name to the kill() function that was not |
4732 | recognized. Say C<kill -l> in your shell to see the valid signal names | |
4733 | on your system. | |
a0d0e21e | 4734 | |
90248788 | 4735 | =item Unrecognized switch: -%s (-h will show valid options) |
a0d0e21e | 4736 | |
be771a83 GS |
4737 | (F) You specified an illegal option to Perl. Don't do that. (If you |
4738 | think you didn't do that, check the #! line to see if it's supplying the | |
4739 | bad switch on your behalf.) | |
a0d0e21e LW |
4740 | |
4741 | =item Unsuccessful %s on filename containing newline | |
4742 | ||
be771a83 GS |
4743 | (W newline) A file operation was attempted on a filename, and that |
4744 | operation failed, PROBABLY because the filename contained a newline, | |
5b3eff12 | 4745 | PROBABLY because you forgot to chomp() it off. See L<perlfunc/chomp>. |
a0d0e21e LW |
4746 | |
4747 | =item Unsupported directory function "%s" called | |
4748 | ||
4749 | (F) Your machine doesn't support opendir() and readdir(). | |
4750 | ||
6df41af2 GS |
4751 | =item Unsupported function %s |
4752 | ||
4753 | (F) This machine doesn't implement the indicated function, apparently. | |
4754 | At least, Configure doesn't think so. | |
4755 | ||
54310121 | 4756 | =item Unsupported function fork |
4757 | ||
4758 | (F) Your version of executable does not support forking. | |
4759 | ||
be771a83 GS |
4760 | Note that under some systems, like OS/2, there may be different flavors |
4761 | of Perl executables, some of which may support fork, some not. Try | |
4762 | changing the name you call Perl by to C<perl_>, C<perl__>, and so on. | |
54310121 | 4763 | |
7aa207d6 | 4764 | =item Unsupported script encoding %s |
b250498f GS |
4765 | |
4766 | (F) Your program file begins with a Unicode Byte Order Mark (BOM) which | |
7aa207d6 | 4767 | declares it to be in a Unicode encoding that Perl cannot read. |
b250498f | 4768 | |
a0d0e21e LW |
4769 | =item Unsupported socket function "%s" called |
4770 | ||
4771 | (F) Your machine doesn't support the Berkeley socket mechanism, or at | |
4772 | least that's what Configure thought. | |
4773 | ||
6df41af2 | 4774 | =item Unterminated attribute list |
a0d0e21e | 4775 | |
be771a83 GS |
4776 | (F) The lexer found something other than a simple identifier at the |
4777 | start of an attribute, and it wasn't a semicolon or the start of a | |
4778 | block. Perhaps you terminated the parameter list of the previous | |
4779 | attribute too soon. See L<attributes>. | |
a0d0e21e | 4780 | |
09bef843 SB |
4781 | =item Unterminated attribute parameter in attribute list |
4782 | ||
be771a83 GS |
4783 | (F) The lexer saw an opening (left) parenthesis character while parsing |
4784 | an attribute list, but the matching closing (right) parenthesis | |
09bef843 SB |
4785 | character was not found. You may need to add (or remove) a backslash |
4786 | character to get your parentheses to balance. See L<attributes>. | |
4787 | ||
f1991046 GS |
4788 | =item Unterminated compressed integer |
4789 | ||
4790 | (F) An argument to unpack("w",...) was incompatible with the BER | |
4791 | compressed integer format and could not be converted to an integer. | |
4792 | See L<perlfunc/pack>. | |
4793 | ||
e2e6a0f1 YO |
4794 | =item Unterminated verb pattern in regex; marked by <-- HERE in m/%s/ |
4795 | ||
4796 | (F) You used a pattern of the form C<(*VERB)> but did not terminate | |
4797 | the pattern with a C<)>. Fix the pattern and retry. | |
4798 | ||
4799 | =item Unterminated verb pattern argument in regex; marked by <-- HERE in m/%s/ | |
4800 | ||
4801 | (F) You used a pattern of the form C<(*VERB:ARG)> but did not terminate | |
4802 | the pattern with a C<)>. Fix the pattern and retry. | |
4803 | ||
2bf803e2 YO |
4804 | =item Unterminated \g{...} pattern in regex; marked by <-- HERE in m/%s/ |
4805 | ||
4806 | (F) You missed a close brace on a \g{..} pattern (group reference) in | |
4807 | a regular expression. Fix the pattern and retry. | |
e2e6a0f1 | 4808 | |
6df41af2 | 4809 | =item Unterminated <> operator |
09bef843 | 4810 | |
6df41af2 | 4811 | (F) The lexer saw a left angle bracket in a place where it was expecting |
be771a83 GS |
4812 | a term, so it's looking for the corresponding right angle bracket, and |
4813 | not finding it. Chances are you left some needed parentheses out | |
4814 | earlier in the line, and you really meant a "less than". | |
09bef843 | 4815 | |
6df41af2 | 4816 | =item untie attempted while %d inner references still exist |
a0d0e21e | 4817 | |
be771a83 GS |
4818 | (W untie) A copy of the object returned from C<tie> (or C<tied>) was |
4819 | still valid when C<untie> was called. | |
a0d0e21e | 4820 | |
8e11cd2b JC |
4821 | =item Usage: POSIX::%s(%s) |
4822 | ||
4823 | (F) You called a POSIX function with incorrect arguments. | |
4824 | See L<POSIX/FUNCTIONS> for more information. | |
4825 | ||
4826 | =item Usage: Win32::%s(%s) | |
4827 | ||
4828 | (F) You called a Win32 function with incorrect arguments. | |
4829 | See L<Win32> for more information. | |
4830 | ||
96ebfdd7 | 4831 | =item Useless (?-%s) - don't use /%s modifier in regex; marked by <-- HERE in m/%s/ |
9d1d55b5 | 4832 | |
96ebfdd7 RK |
4833 | (W regexp) You have used an internal modifier such as (?-o) that has no |
4834 | meaning unless removed from the entire regexp: | |
9d1d55b5 | 4835 | |
96ebfdd7 | 4836 | if ($string =~ /(?-o)$pattern/o) { ... } |
9d1d55b5 JP |
4837 | |
4838 | must be written as | |
4839 | ||
96ebfdd7 | 4840 | if ($string =~ /$pattern/) { ... } |
9d1d55b5 JP |
4841 | |
4842 | The <-- HERE shows in the regular expression about | |
4843 | where the problem was discovered. See L<perlre>. | |
4844 | ||
b4581f09 JH |
4845 | =item Useless localization of %s |
4846 | ||
4847 | (W syntax) The localization of lvalues such as C<local($x=10)> is | |
4848 | legal, but in fact the local() currently has no effect. This may change at | |
4849 | some point in the future, but in the meantime such code is discouraged. | |
4850 | ||
96ebfdd7 | 4851 | =item Useless (?%s) - use /%s modifier in regex; marked by <-- HERE in m/%s/ |
9d1d55b5 | 4852 | |
96ebfdd7 RK |
4853 | (W regexp) You have used an internal modifier such as (?o) that has no |
4854 | meaning unless applied to the entire regexp: | |
9d1d55b5 | 4855 | |
96ebfdd7 | 4856 | if ($string =~ /(?o)$pattern/) { ... } |
9d1d55b5 JP |
4857 | |
4858 | must be written as | |
4859 | ||
96ebfdd7 | 4860 | if ($string =~ /$pattern/o) { ... } |
9d1d55b5 JP |
4861 | |
4862 | The <-- HERE shows in the regular expression about | |
4863 | where the problem was discovered. See L<perlre>. | |
4864 | ||
b08e453b RB |
4865 | =item Useless use of /d modifier in transliteration operator |
4866 | ||
4867 | (W misc) You have used the /d modifier where the searchlist has the | |
4868 | same length as the replacelist. See L<perlop> for more information | |
4869 | about the /d modifier. | |
4870 | ||
6df41af2 | 4871 | =item Useless use of %s in void context |
a0d0e21e | 4872 | |
75b44862 | 4873 | (W void) You did something without a side effect in a context that does |
be771a83 GS |
4874 | nothing with the return value, such as a statement that doesn't return a |
4875 | value from a block, or the left side of a scalar comma operator. Very | |
4876 | often this points not to stupidity on your part, but a failure of Perl | |
4877 | to parse your program the way you thought it would. For example, you'd | |
4878 | get this if you mixed up your C precedence with Python precedence and | |
4879 | said | |
a0d0e21e | 4880 | |
6df41af2 | 4881 | $one, $two = 1, 2; |
748a9306 | 4882 | |
6df41af2 GS |
4883 | when you meant to say |
4884 | ||
4885 | ($one, $two) = (1, 2); | |
4886 | ||
4887 | Another common error is to use ordinary parentheses to construct a list | |
4888 | reference when you should be using square or curly brackets, for | |
4889 | example, if you say | |
4890 | ||
4891 | $array = (1,2); | |
4892 | ||
4893 | when you should have said | |
4894 | ||
4895 | $array = [1,2]; | |
4896 | ||
4897 | The square brackets explicitly turn a list value into a scalar value, | |
4898 | while parentheses do not. So when a parenthesized list is evaluated in | |
4899 | a scalar context, the comma is treated like C's comma operator, which | |
4900 | throws away the left argument, which is not what you want. See | |
4901 | L<perlref> for more on this. | |
4902 | ||
65191a1e BS |
4903 | This warning will not be issued for numerical constants equal to 0 or 1 |
4904 | since they are often used in statements like | |
4905 | ||
4358a253 | 4906 | 1 while sub_with_side_effects(); |
65191a1e BS |
4907 | |
4908 | String constants that would normally evaluate to 0 or 1 are warned | |
4909 | about. | |
4910 | ||
6df41af2 GS |
4911 | =item Useless use of "re" pragma |
4912 | ||
4913 | (W) You did C<use re;> without any arguments. That isn't very useful. | |
4914 | ||
a801c63c RGS |
4915 | =item Useless use of sort in scalar context |
4916 | ||
4917 | (W void) You used sort in scalar context, as in : | |
4918 | ||
4919 | my $x = sort @y; | |
4920 | ||
4921 | This is not very useful, and perl currently optimizes this away. | |
4922 | ||
de4864e4 JH |
4923 | =item Useless use of %s with no values |
4924 | ||
f87c3213 | 4925 | (W syntax) You used the push() or unshift() function with no arguments |
de4864e4 JH |
4926 | apart from the array, like C<push(@x)> or C<unshift(@foo)>. That won't |
4927 | usually have any effect on the array, so is completely useless. It's | |
4928 | possible in principle that push(@tied_array) could have some effect | |
4929 | if the array is tied to a class which implements a PUSH method. If so, | |
4930 | you can write it as C<push(@tied_array,())> to avoid this warning. | |
4931 | ||
6df41af2 GS |
4932 | =item "use" not allowed in expression |
4933 | ||
be771a83 GS |
4934 | (F) The "use" keyword is recognized and executed at compile time, and |
4935 | returns no useful value. See L<perlmod>. | |
748a9306 | 4936 | |
55b67815 RGS |
4937 | =item Use of assignment to $[ is deprecated |
4938 | ||
4939 | (D deprecated) The C<$[> variable (index of the first element in an array) | |
4940 | is deprecated. See L<perlvar/"$[">. | |
4941 | ||
c47ff5f1 | 4942 | =item Use of bare << to mean <<"" is deprecated |
4633a7c4 | 4943 | |
8ab8f082 | 4944 | (D deprecated) You are now encouraged to use the explicitly quoted |
83ce3e12 RGS |
4945 | form if you wish to use an empty line as the terminator of the here-document. |
4946 | ||
4947 | =item Use of comma-less variable list is deprecated | |
4948 | ||
8ab8f082 | 4949 | (D deprecated) The values you give to a format should be |
83ce3e12 | 4950 | separated by commas, not just aligned on a line. |
4633a7c4 | 4951 | |
96ebfdd7 RK |
4952 | =item Use of chdir('') or chdir(undef) as chdir() deprecated |
4953 | ||
4954 | (D deprecated) chdir() with no arguments is documented to change to | |
4955 | $ENV{HOME} or $ENV{LOGDIR}. chdir(undef) and chdir('') share this | |
4956 | behavior, but that has been deprecated. In future versions they | |
4957 | will simply fail. | |
4958 | ||
4959 | Be careful to check that what you pass to chdir() is defined and not | |
4960 | blank, else you might find yourself in your home directory. | |
4961 | ||
64e578a2 MJD |
4962 | =item Use of /c modifier is meaningless in s/// |
4963 | ||
4964 | (W regexp) You used the /c modifier in a substitution. The /c | |
4965 | modifier is not presently meaningful in substitutions. | |
4966 | ||
4ac733c9 MJD |
4967 | =item Use of /c modifier is meaningless without /g |
4968 | ||
4969 | (W regexp) You used the /c modifier with a regex operand, but didn't | |
4970 | use the /g modifier. Currently, /c is meaningful only when /g is | |
4971 | used. (This may change in the future.) | |
4972 | ||
036e1e65 RGS |
4973 | =item Use of := for an empty attribute list is deprecated |
4974 | ||
4975 | (D deprecated) The construction C<my $x := 42> currently | |
4976 | parses correctly in perl, being equivalent to C<my $x : = 42> | |
4977 | (applying an empty attribute list to C<$x>). This useless | |
4978 | construct is now deprecated, so C<:=> can be reclaimed as a new | |
4979 | operator in the future. | |
4980 | ||
b6c83531 | 4981 | =item Use of freed value in iteration |
2f7da168 | 4982 | |
b6c83531 JH |
4983 | (F) Perhaps you modified the iterated array within the loop? |
4984 | This error is typically caused by code like the following: | |
2f7da168 RK |
4985 | |
4986 | @a = (3,4); | |
4987 | @a = () for (1,2,@a); | |
4988 | ||
4989 | You are not supposed to modify arrays while they are being iterated over. | |
4990 | For speed and efficiency reasons, Perl internally does not do full | |
4991 | reference-counting of iterated items, hence deleting such an item in the | |
4992 | middle of an iteration causes Perl to see a freed value. | |
4993 | ||
39b99f21 | 4994 | =item Use of *glob{FILEHANDLE} is deprecated |
4995 | ||
4996 | (D deprecated) You are now encouraged to use the shorter *glob{IO} form | |
4997 | to access the filehandle slot within a typeglob. | |
4998 | ||
96ebfdd7 | 4999 | =item Use of /g modifier is meaningless in split |
35ae6b54 | 5000 | |
96ebfdd7 RK |
5001 | (W regexp) You used the /g modifier on the pattern for a C<split> |
5002 | operator. Since C<split> always tries to match the pattern | |
5003 | repeatedly, the C</g> has no effect. | |
35ae6b54 | 5004 | |
0b98bec9 RGS |
5005 | =item Use of "goto" to jump into a construct is deprecated |
5006 | ||
5007 | (D deprecated) Using C<goto> to jump from an outer scope into an inner | |
5008 | scope is deprecated and should be avoided. | |
5009 | ||
dc848c6f | 5010 | =item Use of inherited AUTOLOAD for non-method %s() is deprecated |
5011 | ||
be771a83 GS |
5012 | (D deprecated) As an (ahem) accidental feature, C<AUTOLOAD> subroutines |
5013 | are looked up as methods (using the C<@ISA> hierarchy) even when the | |
5014 | subroutines to be autoloaded were called as plain functions (e.g. | |
5015 | C<Foo::bar()>), not as methods (e.g. C<< Foo->bar() >> or C<< | |
5016 | $obj->bar() >>). | |
dc848c6f | 5017 | |
be771a83 GS |
5018 | This bug will be rectified in future by using method lookup only for |
5019 | methods' C<AUTOLOAD>s. However, there is a significant base of existing | |
5020 | code that may be using the old behavior. So, as an interim step, Perl | |
5021 | currently issues an optional warning when non-methods use inherited | |
5022 | C<AUTOLOAD>s. | |
dc848c6f | 5023 | |
5024 | The simple rule is: Inheritance will not work when autoloading | |
be771a83 GS |
5025 | non-methods. The simple fix for old code is: In any module that used |
5026 | to depend on inheriting C<AUTOLOAD> for non-methods from a base class | |
5027 | named C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during | |
5028 | startup. | |
dc848c6f | 5029 | |
be771a83 GS |
5030 | In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> |
5031 | you should remove AutoLoader from @ISA and change C<use AutoLoader;> to | |
7b8d334a | 5032 | C<use AutoLoader 'AUTOLOAD';>. |
fb73857a | 5033 | |
6df41af2 GS |
5034 | =item Use of %s in printf format not supported |
5035 | ||
5036 | (F) You attempted to use a feature of printf that is accessible from | |
5037 | only C. This usually means there's a better way to do it in Perl. | |
5038 | ||
6df41af2 GS |
5039 | =item Use of %s is deprecated |
5040 | ||
75b44862 | 5041 | (D deprecated) The construct indicated is no longer recommended for use, |
be771a83 GS |
5042 | generally because there's a better way to do it, and also because the |
5043 | old way has bad side effects. | |
6df41af2 | 5044 | |
96ebfdd7 RK |
5045 | =item Use of -l on filehandle %s |
5046 | ||
5047 | (W io) A filehandle represents an opened file, and when you opened the file | |
5048 | it already went past any symlink you are presumably trying to look for. | |
5049 | The operation returned C<undef>. Use a filename instead. | |
5050 | ||
5051 | =item Use of "package" with no arguments is deprecated | |
5052 | ||
5053 | (D deprecated) You used the C<package> keyword without specifying a package | |
5054 | name. So no namespace is current at all. Using this can cause many | |
5055 | otherwise reasonable constructs to fail in baffling ways. C<use strict;> | |
5056 | instead. | |
5057 | ||
ea25a9b2 Z |
5058 | =item Use of qw(...) as parentheses is deprecated |
5059 | ||
5060 | (D deprecated) You have something like C<foreach $x qw(a b c) {...}>, | |
5061 | using a C<qw(...)> list literal where a parenthesised expression is | |
5062 | expected. Historically the parser fooled itself into thinking that | |
5063 | C<qw(...)> literals were always enclosed in parentheses, and as a result | |
5064 | you could sometimes omit parentheses around them. (You could never do | |
5065 | the C<foreach qw(a b c) {...}> that you might have expected, though.) | |
5066 | The parser no longer lies to itself in this way. Wrap the list literal | |
5067 | in parentheses, like C<foreach $x (qw(a b c)) {...}>. | |
5068 | ||
1f1cc344 | 5069 | =item Use of reference "%s" as array index |
d804643f | 5070 | |
77b96956 | 5071 | (W misc) You tried to use a reference as an array index; this probably |
1f1cc344 JH |
5072 | isn't what you mean, because references in numerical context tend |
5073 | to be huge numbers, and so usually indicates programmer error. | |
d804643f | 5074 | |
64977eb6 | 5075 | If you really do mean it, explicitly numify your reference, like so: |
1f1cc344 JH |
5076 | C<$array[0+$ref]>. This warning is not given for overloaded objects, |
5077 | either, because you can overload the numification and stringification | |
353c6505 | 5078 | operators and then you assumably know what you are doing. |
d804643f | 5079 | |
85b81015 LW |
5080 | =item Use of reserved word "%s" is deprecated |
5081 | ||
be771a83 GS |
5082 | (D deprecated) The indicated bareword is a reserved word. Future |
5083 | versions of perl may use it as a keyword, so you're better off either | |
5084 | explicitly quoting the word in a manner appropriate for its context of | |
5085 | use, or using a different name altogether. The warning can be | |
5086 | suppressed for subroutine names by either adding a C<&> prefix, or using | |
5087 | a package qualifier, e.g. C<&our()>, or C<Foo::our()>. | |
85b81015 | 5088 | |
bbd7eb8a RD |
5089 | =item Use of tainted arguments in %s is deprecated |
5090 | ||
159f47d9 | 5091 | (W taint, deprecated) You have supplied C<system()> or C<exec()> with multiple |
bbd7eb8a RD |
5092 | arguments and at least one of them is tainted. This used to be allowed |
5093 | but will become a fatal error in a future version of perl. Untaint your | |
5094 | arguments. See L<perlsec>. | |
5095 | ||
cc95b072 | 5096 | =item Use of uninitialized value%s |
a0d0e21e | 5097 | |
be771a83 GS |
5098 | (W uninitialized) An undefined value was used as if it were already |
5099 | defined. It was interpreted as a "" or a 0, but maybe it was a mistake. | |
5100 | To suppress this warning assign a defined value to your variables. | |
a0d0e21e | 5101 | |
29489e7c DM |
5102 | To help you figure out what was undefined, perl will try to tell you the |
5103 | name of the variable (if any) that was undefined. In some cases it cannot | |
5104 | do this, so it also tells you what operation you used the undefined value | |
5105 | in. Note, however, that perl optimizes your program and the operation | |
5106 | displayed in the warning may not necessarily appear literally in your | |
5107 | program. For example, C<"that $foo"> is usually optimized into C<"that " | |
5108 | . $foo>, and the warning will refer to the C<concatenation (.)> operator, | |
5109 | even though there is no C<.> in your program. | |
e5be4a53 | 5110 | |
a1063b2d RH |
5111 | =item Using a hash as a reference is deprecated |
5112 | ||
496a33f5 | 5113 | (D deprecated) You tried to use a hash as a reference, as in |
1b1f1335 NIS |
5114 | C<< %foo->{"bar"} >> or C<< %$ref->{"hello"} >>. Versions of perl <= 5.6.1 |
5115 | used to allow this syntax, but shouldn't have. It is now deprecated, and will | |
496a33f5 | 5116 | be removed in a future version. |
a1063b2d RH |
5117 | |
5118 | =item Using an array as a reference is deprecated | |
5119 | ||
496a33f5 | 5120 | (D deprecated) You tried to use an array as a reference, as in |
1b1f1335 NIS |
5121 | C<< @foo->[23] >> or C<< @$ref->[99] >>. Versions of perl <= 5.6.1 used to |
5122 | allow this syntax, but shouldn't have. It is now deprecated, and will be | |
496a33f5 | 5123 | removed in a future version. |
a1063b2d | 5124 | |
ff3f963a KW |
5125 | =item Using just the first character returned by \N{} in character class |
5126 | ||
5127 | (W) A charnames handler may return a sequence of more than one character. | |
5128 | Currently all but the first one are discarded when used in a regular | |
5129 | expression pattern bracketed character class. | |
5130 | ||
5131 | =item Using just the first characters returned by \N{} | |
5132 | ||
5133 | (W) A charnames handler may return a sequence of characters. There is a finite | |
5134 | limit as to the number of characters that can be used, which this sequence | |
5135 | exceeded. In the message, the characters in the sequence are separated by | |
5136 | dots, and each is shown by its ordinal in hex. Anything to the left of the | |
5137 | C<HERE> was retained; anything to the right was discarded. | |
5138 | ||
9466bab6 JH |
5139 | =item UTF-16 surrogate %s |
5140 | ||
a69635b7 | 5141 | (W utf8) You tried to generate half of a UTF-16 surrogate by |
507b9800 JH |
5142 | requesting a Unicode character between the code points 0xD800 and |
5143 | 0xDFFF (inclusive). That range is reserved exclusively for the use of | |
5144 | UTF-16 encoding (by having two 16-bit UCS-2 characters); but Perl | |
5145 | encodes its characters in UTF-8, so what you got is a very illegal | |
e1b711da | 5146 | character. If you really really know what you are doing you can turn off |
507b9800 | 5147 | this warning by C<no warnings 'utf8';>. |
9466bab6 | 5148 | |
68dc0745 | 5149 | =item Value of %s can be "0"; test with defined() |
a6006777 | 5150 | |
75b44862 | 5151 | (W misc) In a conditional expression, you used <HANDLE>, <*> (glob), |
be771a83 GS |
5152 | C<each()>, or C<readdir()> as a boolean value. Each of these constructs |
5153 | can return a value of "0"; that would make the conditional expression | |
5154 | false, which is probably not what you intended. When using these | |
5155 | constructs in conditional expressions, test their values with the | |
5156 | C<defined> operator. | |
a6006777 | 5157 | |
f675dbe5 CB |
5158 | =item Value of CLI symbol "%s" too long |
5159 | ||
be771a83 GS |
5160 | (W misc) A warning peculiar to VMS. Perl tried to read the value of an |
5161 | %ENV element from a CLI symbol table, and found a resultant string | |
5162 | longer than 1024 characters. The return value has been truncated to | |
5163 | 1024 characters. | |
f675dbe5 | 5164 | |
b5c19bd7 | 5165 | =item Variable "%s" is not available |
44a8e56a | 5166 | |
b5c19bd7 DM |
5167 | (W closure) During compilation, an inner named subroutine or eval is |
5168 | attempting to capture an outer lexical that is not currently available. | |
42c13b56 | 5169 | This can happen for one of two reasons. First, the outer lexical may be |
b5c19bd7 DM |
5170 | declared in an outer anonymous subroutine that has not yet been created. |
5171 | (Remember that named subs are created at compile time, while anonymous | |
42c13b56 | 5172 | subs are created at run-time.) For example, |
44a8e56a | 5173 | |
b5c19bd7 | 5174 | sub { my $a; sub f { $a } } |
44a8e56a | 5175 | |
b5c19bd7 DM |
5176 | At the time that f is created, it can't capture the current value of $a, |
5177 | since the anonymous subroutine hasn't been created yet. Conversely, | |
5178 | the following won't give a warning since the anonymous subroutine has by | |
5179 | now been created and is live: | |
be771a83 | 5180 | |
b5c19bd7 DM |
5181 | sub { my $a; eval 'sub f { $a }' }->(); |
5182 | ||
5183 | The second situation is caused by an eval accessing a variable that has | |
5184 | gone out of scope, for example, | |
5185 | ||
5186 | sub f { | |
5187 | my $a; | |
5188 | sub { eval '$a' } | |
5189 | } | |
5190 | f()->(); | |
5191 | ||
5192 | Here, when the '$a' in the eval is being compiled, f() is not currently being | |
5193 | executed, so its $a is not available for capture. | |
44a8e56a | 5194 | |
b4581f09 JH |
5195 | =item Variable "%s" is not imported%s |
5196 | ||
413ff9f6 FC |
5197 | (W misc) With "use strict" in effect, you referred to a global variable |
5198 | that you apparently thought was imported from another module, because | |
b4581f09 JH |
5199 | something else of the same name (usually a subroutine) is exported by |
5200 | that module. It usually means you put the wrong funny character on the | |
5201 | front of your variable. | |
5202 | ||
58e23c8d | 5203 | =item Variable length lookbehind not implemented in m/%s/ |
b4581f09 JH |
5204 | |
5205 | (F) Lookbehind is allowed only for subexpressions whose length is fixed and | |
58e23c8d | 5206 | known at compile time. See L<perlre>. |
b4581f09 JH |
5207 | |
5208 | =item "%s" variable %s masks earlier declaration in same %s | |
5209 | ||
30c282f6 | 5210 | (W misc) A "my", "our" or "state" variable has been redeclared in the current |
b4581f09 JH |
5211 | scope or statement, effectively eliminating all access to the previous |
5212 | instance. This is almost always a typographical error. Note that the | |
5213 | earlier variable will still exist until the end of the scope or until | |
5214 | all closure referents to it are destroyed. | |
5215 | ||
6df41af2 GS |
5216 | =item Variable syntax |
5217 | ||
5218 | (A) You've accidentally run your script through B<csh> instead | |
5219 | of Perl. Check the #! line, or manually feed your script into | |
5220 | Perl yourself. | |
5221 | ||
44a8e56a | 5222 | =item Variable "%s" will not stay shared |
5223 | ||
be771a83 | 5224 | (W closure) An inner (nested) I<named> subroutine is referencing a |
b5c19bd7 | 5225 | lexical variable defined in an outer named subroutine. |
44a8e56a | 5226 | |
b5c19bd7 | 5227 | When the inner subroutine is called, it will see the value of |
be771a83 GS |
5228 | the outer subroutine's variable as it was before and during the *first* |
5229 | call to the outer subroutine; in this case, after the first call to the | |
5230 | outer subroutine is complete, the inner and outer subroutines will no | |
5231 | longer share a common value for the variable. In other words, the | |
5232 | variable will no longer be shared. | |
44a8e56a | 5233 | |
44a8e56a | 5234 | This problem can usually be solved by making the inner subroutine |
5235 | anonymous, using the C<sub {}> syntax. When inner anonymous subs that | |
b5c19bd7 | 5236 | reference variables in outer subroutines are created, they |
be771a83 | 5237 | are automatically rebound to the current values of such variables. |
44a8e56a | 5238 | |
e2e6a0f1 YO |
5239 | =item Verb pattern '%s' has a mandatory argument in regex; marked by <-- HERE in m/%s/ |
5240 | ||
5241 | (F) You used a verb pattern that requires an argument. Supply an argument | |
5242 | or check that you are using the right verb. | |
5243 | ||
5244 | =item Verb pattern '%s' may not have an argument in regex; marked by <-- HERE in m/%s/ | |
5245 | ||
5246 | (F) You used a verb pattern that is not allowed an argument. Remove the | |
5247 | argument or check that you are using the right verb. | |
5248 | ||
084610c0 GS |
5249 | =item Version number must be a constant number |
5250 | ||
5251 | (P) The attempt to translate a C<use Module n.n LIST> statement into | |
5252 | its equivalent C<BEGIN> block found an internal inconsistency with | |
5253 | the version number. | |
5254 | ||
808ee47e SP |
5255 | =item Version string '%s' contains invalid data; ignoring: '%s' |
5256 | ||
32e998fd RGS |
5257 | (W misc) The version string contains invalid characters at the end, which |
5258 | are being ignored. | |
808ee47e | 5259 | |
7e1af8bc | 5260 | =item Warning: something's wrong |
5f05dabc | 5261 | |
5262 | (W) You passed warn() an empty string (the equivalent of C<warn "">) or | |
ec8bb14c | 5263 | you called it with no args and C<$@> was empty. |
5f05dabc | 5264 | |
f86702cc | 5265 | =item Warning: unable to close filehandle %s properly |
a0d0e21e | 5266 | |
be771a83 GS |
5267 | (S) The implicit close() done by an open() got an error indication on |
5268 | the close(). This usually indicates your file system ran out of disk | |
5269 | space. | |
a0d0e21e | 5270 | |
5f05dabc | 5271 | =item Warning: Use of "%s" without parentheses is ambiguous |
a0d0e21e | 5272 | |
be771a83 GS |
5273 | (S ambiguous) You wrote a unary operator followed by something that |
5274 | looks like a binary operator that could also have been interpreted as a | |
5275 | term or unary operator. For instance, if you know that the rand | |
5276 | function has a default argument of 1.0, and you write | |
a0d0e21e LW |
5277 | |
5278 | rand + 5; | |
5279 | ||
5280 | you may THINK you wrote the same thing as | |
5281 | ||
5282 | rand() + 5; | |
5283 | ||
5284 | but in actual fact, you got | |
5285 | ||
5286 | rand(+5); | |
5287 | ||
5f05dabc | 5288 | So put in parentheses to say what you really mean. |
a0d0e21e | 5289 | |
4b3603a4 JH |
5290 | =item Wide character in %s |
5291 | ||
c8f79457 | 5292 | (S utf8) Perl met a wide character (>255) when it wasn't expecting |
cd28123a JH |
5293 | one. This warning is by default on for I/O (like print). The easiest |
5294 | way to quiet this warning is simply to add the C<:utf8> layer to the | |
5295 | output, e.g. C<binmode STDOUT, ':utf8'>. Another way to turn off the | |
5296 | warning is to add C<no warnings 'utf8';> but that is often closer to | |
5297 | cheating. In general, you are supposed to explicitly mark the | |
5298 | filehandle with an encoding, see L<open> and L<perlfunc/binmode>. | |
4b3603a4 | 5299 | |
49704364 WL |
5300 | =item Within []-length '%c' not allowed |
5301 | ||
5302 | (F) The count in the (un)pack template may be replaced by C<[TEMPLATE]> only if | |
5303 | C<TEMPLATE> always matches the same amount of packed bytes that can be | |
5304 | determined from the template alone. This is not possible if it contains an | |
5305 | of the codes @, /, U, u, w or a *-length. Redesign the template. | |
5306 | ||
9a7dcd9c | 5307 | =item write() on closed filehandle %s |
a0d0e21e | 5308 | |
be771a83 | 5309 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 5310 | before now. Check your control flow. |
a0d0e21e | 5311 | |
b4581f09 JH |
5312 | =item %s "\x%s" does not map to Unicode |
5313 | ||
5314 | When reading in different encodings Perl tries to map everything | |
5315 | into Unicode characters. The bytes you read in are not legal in | |
5316 | this encoding, for example | |
5317 | ||
5318 | utf8 "\xE4" does not map to Unicode | |
5319 | ||
5320 | if you try to read in the a-diaereses Latin-1 as UTF-8. | |
5321 | ||
49704364 | 5322 | =item 'X' outside of string |
a0d0e21e | 5323 | |
49704364 WL |
5324 | (F) You had a (un)pack template that specified a relative position before |
5325 | the beginning of the string being (un)packed. See L<perlfunc/pack>. | |
a0d0e21e | 5326 | |
49704364 | 5327 | =item 'x' outside of string in unpack |
a0d0e21e LW |
5328 | |
5329 | (F) You had a pack template that specified a relative position after | |
5330 | the end of the string being unpacked. See L<perlfunc/pack>. | |
5331 | ||
a0d0e21e LW |
5332 | =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! |
5333 | ||
5f05dabc | 5334 | (F) And you probably never will, because you probably don't have the |
a0d0e21e | 5335 | sources to your kernel, and your vendor probably doesn't give a rip |
1b1f1335 | 5336 | about what you want. Your best bet is to put a setuid C wrapper around |
496a33f5 | 5337 | your script. |
a0d0e21e LW |
5338 | |
5339 | =item You need to quote "%s" | |
5340 | ||
be771a83 GS |
5341 | (W syntax) You assigned a bareword as a signal handler name. |
5342 | Unfortunately, you already have a subroutine of that name declared, | |
5343 | which means that Perl 5 will try to call the subroutine when the | |
5344 | assignment is executed, which is probably not what you want. (If it IS | |
5345 | what you want, put an & in front.) | |
a0d0e21e | 5346 | |
6cfd5ea7 JH |
5347 | =item Your random numbers are not that random |
5348 | ||
5349 | (F) When trying to initialise the random seed for hashes, Perl could | |
5350 | not get any randomness out of your system. This usually indicates | |
5351 | Something Very Wrong. | |
5352 | ||
a0d0e21e LW |
5353 | =back |
5354 | ||
00eb3f2b RGS |
5355 | =head1 SEE ALSO |
5356 | ||
5357 | L<warnings>, L<perllexwarn>. | |
5358 | ||
56e90b21 | 5359 | =cut |