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). | |
11 | (D) A deprecation (optional). | |
e476b1b5 | 12 | (S) A severe warning (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 | ||
30 | Default warnings are always enabled unless they are explicitly disabled | |
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 | |
6df41af2 | 92 | =item '|' and '<' may not both be specified on command line |
a0d0e21e | 93 | |
be771a83 GS |
94 | (F) An error peculiar to VMS. Perl does its own command line |
95 | redirection, and found that STDIN was a pipe, and that you also tried to | |
96 | redirect STDIN using '<'. Only one STDIN stream to a customer, please. | |
c9f97d15 | 97 | |
6df41af2 | 98 | =item '|' and '>' may not both be specified on command line |
1028017a | 99 | |
be771a83 GS |
100 | (F) An error peculiar to VMS. Perl does its own command line |
101 | redirection, and thinks you tried to redirect stdout both to a file and | |
102 | into a pipe to another command. You need to choose one or the other, | |
103 | though nothing's stopping you from piping into a program or Perl script | |
104 | which 'splits' output into two streams, such as | |
1028017a | 105 | |
6df41af2 GS |
106 | open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!"; |
107 | while (<STDIN>) { | |
108 | print; | |
109 | print OUT; | |
110 | } | |
111 | close OUT; | |
c9f97d15 | 112 | |
6df41af2 | 113 | =item Applying %s to %s will act on scalar(%s) |
eb6e2d6f | 114 | |
496a33f5 SC |
115 | (W misc) The pattern match (C<//>), substitution (C<s///>), and |
116 | transliteration (C<tr///>) operators work on scalar values. If you apply | |
be771a83 GS |
117 | one of them to an array or a hash, it will convert the array or hash to |
118 | a scalar value -- the length of an array, or the population info of a | |
119 | hash -- and then work on that scalar value. This is probably not what | |
120 | you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for | |
121 | alternatives. | |
eb6e2d6f | 122 | |
6df41af2 | 123 | =item Args must match #! line |
a0d0e21e | 124 | |
6df41af2 GS |
125 | (F) The setuid emulator requires that the arguments Perl was invoked |
126 | with match the arguments specified on the #! line. Since some systems | |
127 | impose a one-argument limit on the #! line, try combining switches; | |
128 | for example, turn C<-w -U> into C<-wU>. | |
a0d0e21e | 129 | |
6df41af2 | 130 | =item Arg too short for msgsnd |
76cd736e | 131 | |
6df41af2 | 132 | (F) msgsnd() requires a string at least as long as sizeof(long). |
76cd736e | 133 | |
8ea97a1e | 134 | =item %s argument is not a HASH or ARRAY element |
a0d0e21e | 135 | |
8ea97a1e | 136 | (F) The argument to exists() must be a hash or array element, such as: |
a0d0e21e LW |
137 | |
138 | $foo{$bar} | |
cb4f522a | 139 | $ref->{"susie"}[12] |
a0d0e21e | 140 | |
8ea97a1e | 141 | =item %s argument is not a HASH or ARRAY element or slice |
5f05dabc | 142 | |
be771a83 GS |
143 | (F) The argument to delete() must be either a hash or array element, |
144 | such as: | |
5f05dabc | 145 | |
146 | $foo{$bar} | |
cb4f522a | 147 | $ref->{"susie"}[12] |
5f05dabc | 148 | |
8ea97a1e | 149 | or a hash or array slice, such as: |
5f05dabc | 150 | |
6df41af2 GS |
151 | @foo[$bar, $baz, $xyzzy] |
152 | @{$ref->[12]}{"susie", "queue"} | |
5315574d | 153 | |
6df41af2 | 154 | =item %s argument is not a subroutine name |
a0d0e21e | 155 | |
6df41af2 | 156 | (F) The argument to exists() for C<exists &sub> must be a subroutine |
be771a83 GS |
157 | name, and not a subroutine call. C<exists &sub()> will generate this |
158 | error. | |
a0d0e21e | 159 | |
f86702cc | 160 | =item Argument "%s" isn't numeric%s |
a0d0e21e | 161 | |
be771a83 GS |
162 | (W numeric) The indicated string was fed as an argument to an operator |
163 | that expected a numeric value instead. If you're fortunate the message | |
164 | will identify which operator was so unfortunate. | |
a0d0e21e | 165 | |
b4581f09 JH |
166 | =item Argument list not closed for PerlIO layer "%s" |
167 | ||
168 | (W layer) When pushing a layer with arguments onto the Perl I/O system you | |
169 | forgot the ) that closes the argument list. (Layers take care of transforming | |
170 | data between external and internal representations.) Perl stopped parsing | |
171 | the layer list at this point and did not attempt to push this layer. | |
172 | If your program didn't explicitly request the failing operation, it may be | |
173 | the result of the value of the environment variable PERLIO. | |
174 | ||
a0d0e21e LW |
175 | =item Array @%s missing the @ in argument %d of %s() |
176 | ||
75b44862 GS |
177 | (D deprecated) Really old Perl let you omit the @ on array names in some |
178 | spots. This is now heavily deprecated. | |
a0d0e21e LW |
179 | |
180 | =item assertion botched: %s | |
181 | ||
182 | (P) The malloc package that comes with Perl had an internal failure. | |
183 | ||
184 | =item Assertion failed: file "%s" | |
185 | ||
186 | (P) A general assertion failed. The file in question must be examined. | |
187 | ||
188 | =item Assignment to both a list and a scalar | |
189 | ||
190 | (F) If you assign to a conditional operator, the 2nd and 3rd arguments | |
191 | must either both be scalars or both be lists. Otherwise Perl won't | |
192 | know which context to supply to the right side. | |
193 | ||
96ebfdd7 RK |
194 | =item A thread exited while %d threads were running |
195 | ||
4447dfc1 | 196 | (W threads)(S) When using threaded Perl, a thread (not necessarily the main |
96ebfdd7 RK |
197 | thread) exited while there were still other threads running. |
198 | Usually it's a good idea to first collect the return values of the | |
199 | created threads by joining them, and only then exit from the main | |
200 | thread. See L<threads>. | |
201 | ||
2393f1b9 | 202 | =item Attempt to access disallowed key '%s' in a restricted hash |
1b1f1335 | 203 | |
49293501 | 204 | (F) The failing code has attempted to get or set a key which is not in |
2393f1b9 | 205 | the current set of allowed keys of a restricted hash. |
49293501 | 206 | |
81689caa HS |
207 | =item Attempt to bless into a reference |
208 | ||
209 | (F) The CLASSNAME argument to the bless() operator is expected to be | |
210 | the name of the package to bless the resulting object into. You've | |
211 | supplied instead a reference to something: perhaps you wrote | |
212 | ||
213 | bless $self, $proto; | |
214 | ||
215 | when you intended | |
216 | ||
217 | bless $self, ref($proto) || $proto; | |
218 | ||
219 | If you actually want to bless into the stringified version | |
220 | of the reference supplied, you need to stringify it yourself, for | |
221 | example by: | |
222 | ||
223 | bless $self, "$proto"; | |
224 | ||
96ebfdd7 RK |
225 | =item Attempt to delete disallowed key '%s' from a restricted hash |
226 | ||
227 | (F) The failing code attempted to delete from a restricted hash a key | |
228 | which is not in its key set. | |
229 | ||
230 | =item Attempt to delete readonly key '%s' from a restricted hash | |
231 | ||
232 | (F) The failing code attempted to delete a key whose value has been | |
233 | declared readonly from a restricted hash. | |
234 | ||
a0d0e21e LW |
235 | =item Attempt to free non-arena SV: 0x%lx |
236 | ||
be771a83 GS |
237 | (P internal) All SV objects are supposed to be allocated from arenas |
238 | that will be garbage collected on exit. An SV was discovered to be | |
239 | outside any of those arenas. | |
a0d0e21e | 240 | |
54310121 | 241 | =item Attempt to free nonexistent shared string |
bbce6d69 | 242 | |
be771a83 GS |
243 | (P internal) Perl maintains a reference counted internal table of |
244 | strings to optimize the storage and access of hash keys and other | |
245 | strings. This indicates someone tried to decrement the reference count | |
246 | of a string that can no longer be found in the table. | |
bbce6d69 | 247 | |
a0d0e21e LW |
248 | =item Attempt to free temp prematurely |
249 | ||
be771a83 GS |
250 | (W debugging) Mortalized values are supposed to be freed by the |
251 | free_tmps() routine. This indicates that something else is freeing the | |
252 | SV before the free_tmps() routine gets a chance, which means that the | |
253 | free_tmps() routine will be freeing an unreferenced scalar when it does | |
254 | try to free it. | |
a0d0e21e LW |
255 | |
256 | =item Attempt to free unreferenced glob pointers | |
257 | ||
e476b1b5 | 258 | (P internal) The reference counts got screwed up on symbol aliases. |
a0d0e21e LW |
259 | |
260 | =item Attempt to free unreferenced scalar | |
261 | ||
be771a83 GS |
262 | (W internal) Perl went to decrement the reference count of a scalar to |
263 | see if it would go to 0, and discovered that it had already gone to 0 | |
264 | earlier, and should have been freed, and in fact, probably was freed. | |
265 | This could indicate that SvREFCNT_dec() was called too many times, or | |
266 | that SvREFCNT_inc() was called too few times, or that the SV was | |
267 | mortalized when it shouldn't have been, or that memory has been | |
268 | corrupted. | |
a0d0e21e | 269 | |
dcdda58d GS |
270 | =item Attempt to join self |
271 | ||
272 | (F) You tried to join a thread from within itself, which is an | |
be771a83 GS |
273 | impossible task. You may be joining the wrong thread, or you may need |
274 | to move the join() to some other thread. | |
dcdda58d | 275 | |
84902520 TB |
276 | =item Attempt to pack pointer to temporary value |
277 | ||
be771a83 GS |
278 | (W pack) You tried to pass a temporary value (like the result of a |
279 | function, or a computed expression) to the "p" pack() template. This | |
280 | means the result contains a pointer to a location that could become | |
281 | invalid anytime, even before the end of the current statement. Use | |
282 | literals or global values as arguments to the "p" pack() template to | |
283 | avoid this warning. | |
84902520 | 284 | |
1b20cd17 NC |
285 | =item Attempt to set length of freed array |
286 | ||
287 | (W) You tried to set the length of an array which has been freed. You | |
288 | can do this by storing a reference to the scalar representing the last index | |
289 | of an array and later assigning through that reference. For example | |
290 | ||
291 | $r = do {my @a; \$#a}; | |
292 | $$r = 503 | |
293 | ||
b7a902f4 | 294 | =item Attempt to use reference as lvalue in substr |
295 | ||
be771a83 GS |
296 | (W substr) You supplied a reference as the first argument to substr() |
297 | used as an lvalue, which is pretty strange. Perhaps you forgot to | |
298 | dereference it first. See L<perlfunc/substr>. | |
b7a902f4 | 299 | |
dc26df50 | 300 | =item Bad arg length for %s, is %d, should be %s |
a0d0e21e | 301 | |
be771a83 GS |
302 | (F) You passed a buffer of the wrong size to one of msgctl(), semctl() |
303 | or shmctl(). In C parlance, the correct sizes are, respectively, | |
5f05dabc | 304 | S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and |
a0d0e21e LW |
305 | S<sizeof(struct shmid_ds *)>. |
306 | ||
7a95317d GS |
307 | =item Bad evalled substitution pattern |
308 | ||
496a33f5 | 309 | (F) You've used the C</e> switch to evaluate the replacement for a |
7a95317d GS |
310 | substitution, but perl found a syntax error in the code to evaluate, |
311 | most likely an unexpected right brace '}'. | |
312 | ||
a0d0e21e LW |
313 | =item Bad filehandle: %s |
314 | ||
be771a83 GS |
315 | (F) A symbol was passed to something wanting a filehandle, but the |
316 | symbol has no filehandle associated with it. Perhaps you didn't do an | |
317 | open(), or did it in another package. | |
a0d0e21e LW |
318 | |
319 | =item Bad free() ignored | |
320 | ||
be771a83 GS |
321 | (S malloc) An internal routine called free() on something that had never |
322 | been malloc()ed in the first place. Mandatory, but can be disabled by | |
9ea8bc6d | 323 | setting environment variable C<PERL_BADFREE> to 0. |
33c8a3fe | 324 | |
9ea8bc6d | 325 | This message can be seen quite often with DB_File on systems with "hard" |
be771a83 GS |
326 | dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB> |
327 | which is left unnoticed if C<DB> uses I<forgiving> system malloc(). | |
a0d0e21e | 328 | |
aa689395 | 329 | =item Bad hash |
330 | ||
331 | (P) One of the internal hash routines was passed a null HV pointer. | |
332 | ||
6df41af2 GS |
333 | =item Badly placed ()'s |
334 | ||
335 | (A) You've accidentally run your script through B<csh> instead | |
336 | of Perl. Check the #! line, or manually feed your script into | |
337 | Perl yourself. | |
338 | ||
a0d0e21e LW |
339 | =item Bad name after %s:: |
340 | ||
be771a83 GS |
341 | (F) You started to name a symbol by using a package prefix, and then |
342 | didn't finish the symbol. In particular, you can't interpolate outside | |
343 | of quotes, so | |
a0d0e21e LW |
344 | |
345 | $var = 'myvar'; | |
346 | $sym = mypack::$var; | |
347 | ||
348 | is not the same as | |
349 | ||
350 | $var = 'myvar'; | |
351 | $sym = "mypack::$var"; | |
352 | ||
4ad56ec9 IZ |
353 | =item Bad realloc() ignored |
354 | ||
be771a83 GS |
355 | (S malloc) An internal routine called realloc() on something that had |
356 | never been malloc()ed in the first place. Mandatory, but can be disabled | |
357 | by setting environment variable C<PERL_BADFREE> to 1. | |
4ad56ec9 | 358 | |
a0d0e21e LW |
359 | =item Bad symbol for array |
360 | ||
361 | (P) An internal request asked to add an array entry to something that | |
362 | wasn't a symbol table entry. | |
363 | ||
364 | =item Bad symbol for filehandle | |
365 | ||
be771a83 GS |
366 | (P) An internal request asked to add a filehandle entry to something |
367 | that wasn't a symbol table entry. | |
a0d0e21e LW |
368 | |
369 | =item Bad symbol for hash | |
370 | ||
371 | (P) An internal request asked to add a hash entry to something that | |
372 | wasn't a symbol table entry. | |
373 | ||
34d09196 GS |
374 | =item Bareword found in conditional |
375 | ||
be771a83 GS |
376 | (W bareword) The compiler found a bareword where it expected a |
377 | conditional, which often indicates that an || or && was parsed as part | |
378 | of the last argument of the previous construct, for example: | |
34d09196 GS |
379 | |
380 | open FOO || die; | |
381 | ||
be771a83 GS |
382 | It may also indicate a misspelled constant that has been interpreted as |
383 | a bareword: | |
34d09196 GS |
384 | |
385 | use constant TYPO => 1; | |
386 | if (TYOP) { print "foo" } | |
387 | ||
388 | The C<strict> pragma is useful in avoiding such errors. | |
389 | ||
6df41af2 GS |
390 | =item Bareword "%s" not allowed while "strict subs" in use |
391 | ||
392 | (F) With "strict subs" in use, a bareword is only allowed as a | |
be771a83 GS |
393 | subroutine identifier, in curly brackets or to the left of the "=>" |
394 | symbol. Perhaps you need to predeclare a subroutine? | |
6df41af2 GS |
395 | |
396 | =item Bareword "%s" refers to nonexistent package | |
397 | ||
be771a83 GS |
398 | (W bareword) You used a qualified bareword of the form C<Foo::>, but the |
399 | compiler saw no other uses of that namespace before that point. Perhaps | |
400 | you need to predeclare a package? | |
6df41af2 | 401 | |
a0d0e21e LW |
402 | =item BEGIN failed--compilation aborted |
403 | ||
be771a83 GS |
404 | (F) An untrapped exception was raised while executing a BEGIN |
405 | subroutine. Compilation stops immediately and the interpreter is | |
406 | exited. | |
a0d0e21e | 407 | |
68dc0745 | 408 | =item BEGIN not safe after errors--compilation aborted |
409 | ||
410 | (F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which | |
be771a83 GS |
411 | implies a C<BEGIN {}>) after one or more compilation errors had already |
412 | occurred. Since the intended environment for the C<BEGIN {}> could not | |
413 | be guaranteed (due to the errors), and since subsequent code likely | |
414 | depends on its correct operation, Perl just gave up. | |
68dc0745 | 415 | |
6df41af2 GS |
416 | =item \1 better written as $1 |
417 | ||
be771a83 GS |
418 | (W syntax) Outside of patterns, backreferences live on as variables. |
419 | The use of backslashes is grandfathered on the right-hand side of a | |
420 | substitution, but stylistically it's better to use the variable form | |
421 | because other Perl programmers will expect it, and it works better if | |
422 | there are more than 9 backreferences. | |
6df41af2 | 423 | |
252aa082 JH |
424 | =item Binary number > 0b11111111111111111111111111111111 non-portable |
425 | ||
e476b1b5 | 426 | (W portable) The binary number you specified is larger than 2**32-1 |
9e24b6e2 JH |
427 | (4294967295) and therefore non-portable between systems. See |
428 | L<perlport> for more on portability concerns. | |
252aa082 | 429 | |
69282e91 | 430 | =item bind() on closed socket %s |
a0d0e21e | 431 | |
be771a83 GS |
432 | (W closed) You tried to do a bind on a closed socket. Did you forget to |
433 | check the return value of your socket() call? See L<perlfunc/bind>. | |
a0d0e21e | 434 | |
c289d2f7 JH |
435 | =item binmode() on closed filehandle %s |
436 | ||
437 | (W unopened) You tried binmode() on a filehandle that was never opened. | |
438 | Check you control flow and number of arguments. | |
439 | ||
c5a0f51a JH |
440 | =item Bit vector size > 32 non-portable |
441 | ||
e476b1b5 | 442 | (W portable) Using bit vector sizes larger than 32 is non-portable. |
c5a0f51a | 443 | |
4633a7c4 LW |
444 | =item Bizarre copy of %s in %s |
445 | ||
be771a83 | 446 | (P) Perl detected an attempt to copy an internal value that is not |
b45f050a | 447 | copyable. |
4633a7c4 | 448 | |
f675dbe5 CB |
449 | =item Buffer overflow in prime_env_iter: %s |
450 | ||
be771a83 GS |
451 | (W internal) A warning peculiar to VMS. While Perl was preparing to |
452 | iterate over %ENV, it encountered a logical name or symbol definition | |
453 | which was too long, so it was truncated to the string shown. | |
f675dbe5 | 454 | |
a0d0e21e LW |
455 | =item Callback called exit |
456 | ||
4929bf7b | 457 | (F) A subroutine invoked from an external package via call_sv() |
a0d0e21e LW |
458 | exited by calling exit. |
459 | ||
6df41af2 | 460 | =item %s() called too early to check prototype |
f675dbe5 | 461 | |
be771a83 GS |
462 | (W prototype) You've called a function that has a prototype before the |
463 | parser saw a definition or declaration for it, and Perl could not check | |
464 | that the call conforms to the prototype. You need to either add an | |
465 | early prototype declaration for the subroutine in question, or move the | |
466 | subroutine definition ahead of the call to get proper prototype | |
467 | checking. Alternatively, if you are certain that you're calling the | |
468 | function correctly, you may put an ampersand before the name to avoid | |
469 | the warning. See L<perlsub>. | |
f675dbe5 | 470 | |
49704364 | 471 | =item Cannot compress integer in pack |
0258719b NC |
472 | |
473 | (F) An argument to pack("w",...) was too large to compress. The BER | |
474 | compressed integer format can only be used with positive integers, and you | |
475 | attempted to compress Infinity or a very large number (> 1e308). | |
476 | See L<perlfunc/pack>. | |
477 | ||
49704364 | 478 | =item Cannot compress negative numbers in pack |
0258719b NC |
479 | |
480 | (F) An argument to pack("w",...) was negative. The BER compressed integer | |
481 | format can only be used with positive integers. See L<perlfunc/pack>. | |
482 | ||
96ebfdd7 RK |
483 | =item Can only compress unsigned integers in pack |
484 | ||
485 | (F) An argument to pack("w",...) was not an integer. The BER compressed | |
486 | integer format can only be used with positive integers, and you attempted | |
487 | to compress something else. See L<perlfunc/pack>. | |
488 | ||
a0d0e21e LW |
489 | =item Can't bless non-reference value |
490 | ||
491 | (F) Only hard references may be blessed. This is how Perl "enforces" | |
492 | encapsulation of objects. See L<perlobj>. | |
493 | ||
a0d0e21e LW |
494 | =item Can't call method "%s" in empty package "%s" |
495 | ||
496 | (F) You called a method correctly, and it correctly indicated a package | |
497 | functioning as a class, but that package doesn't have ANYTHING defined | |
498 | in it, let alone methods. See L<perlobj>. | |
499 | ||
6df41af2 GS |
500 | =item Can't call method "%s" on an undefined value |
501 | ||
502 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
503 | object reference or package name contains an undefined value. Something |
504 | like this will reproduce the error: | |
6df41af2 GS |
505 | |
506 | $BADREF = undef; | |
507 | process $BADREF 1,2,3; | |
508 | $BADREF->process(1,2,3); | |
509 | ||
a0d0e21e LW |
510 | =item Can't call method "%s" on unblessed reference |
511 | ||
54310121 | 512 | (F) A method call must know in what package it's supposed to run. It |
be771a83 GS |
513 | ordinarily finds this out from the object reference you supply, but you |
514 | didn't supply an object reference in this case. A reference isn't an | |
515 | object reference until it has been blessed. See L<perlobj>. | |
a0d0e21e LW |
516 | |
517 | =item Can't call method "%s" without a package or object reference | |
518 | ||
519 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
520 | object reference or package name contains an expression that returns a |
521 | defined value which is neither an object reference nor a package name. | |
72b5445b GS |
522 | Something like this will reproduce the error: |
523 | ||
524 | $BADREF = 42; | |
525 | process $BADREF 1,2,3; | |
526 | $BADREF->process(1,2,3); | |
527 | ||
a0d0e21e LW |
528 | =item Can't chdir to %s |
529 | ||
530 | (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory | |
531 | that you can chdir to, possibly because it doesn't exist. | |
532 | ||
0545a864 | 533 | =item Can't check filesystem of script "%s" for nosuid |
104d25b7 | 534 | |
be771a83 GS |
535 | (P) For some reason you can't check the filesystem of the script for |
536 | nosuid. | |
104d25b7 | 537 | |
6df41af2 GS |
538 | =item Can't coerce array into hash |
539 | ||
540 | (F) You used an array where a hash was expected, but the array has no | |
541 | information on how to map from keys to array indices. You can do that | |
542 | only with arrays that have a hash reference at index 0. | |
543 | ||
a0d0e21e LW |
544 | =item Can't coerce %s to integer in %s |
545 | ||
546 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 547 | (typeglobs), can't be forced to stop being what they are. So you can't |
a0d0e21e LW |
548 | say things like: |
549 | ||
550 | *foo += 1; | |
551 | ||
552 | You CAN say | |
553 | ||
554 | $foo = *foo; | |
555 | $foo += 1; | |
556 | ||
557 | but then $foo no longer contains a glob. | |
558 | ||
559 | =item Can't coerce %s to number in %s | |
560 | ||
561 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 562 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e LW |
563 | |
564 | =item Can't coerce %s to string in %s | |
565 | ||
566 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 567 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e LW |
568 | |
569 | =item Can't create pipe mailbox | |
570 | ||
be771a83 GS |
571 | (P) An error peculiar to VMS. The process is suffering from exhausted |
572 | quotas or other plumbing problems. | |
a0d0e21e | 573 | |
eb64745e | 574 | =item Can't declare class for non-scalar %s in "%s" |
a0d0e21e | 575 | |
2f7e735d AMS |
576 | (F) Currently, only scalar variables can be declared with a specific |
577 | class qualifier in a "my" or "our" declaration. The semantics may be | |
578 | extended for other types of variables in future. | |
eb64745e GS |
579 | |
580 | =item Can't declare %s in "%s" | |
581 | ||
582 | (F) Only scalar, array, and hash variables may be declared as "my" or | |
583 | "our" variables. They must have ordinary identifiers as names. | |
a0d0e21e | 584 | |
6df41af2 GS |
585 | =item Can't do inplace edit: %s is not a regular file |
586 | ||
be771a83 GS |
587 | (S inplace) You tried to use the B<-i> switch on a special file, such as |
588 | a file in /dev, or a FIFO. The file was ignored. | |
6df41af2 | 589 | |
a0d0e21e LW |
590 | =item Can't do inplace edit on %s: %s |
591 | ||
be771a83 GS |
592 | (S inplace) The creation of the new file failed for the indicated |
593 | reason. | |
a0d0e21e | 594 | |
54310121 | 595 | =item Can't do inplace edit without backup |
a0d0e21e | 596 | |
be771a83 GS |
597 | (F) You're on a system such as MS-DOS that gets confused if you try |
598 | reading from a deleted (but still opened) file. You have to say | |
599 | C<-i.bak>, or some such. | |
a0d0e21e | 600 | |
10f9c03d | 601 | =item Can't do inplace edit: %s would not be unique |
a0d0e21e | 602 | |
e476b1b5 | 603 | (S inplace) Your filesystem does not support filenames longer than 14 |
10f9c03d CK |
604 | characters and Perl was unable to create a unique filename during |
605 | inplace editing with the B<-i> switch. The file was ignored. | |
a0d0e21e | 606 | |
7253e4e3 | 607 | =item Can't do {n,m} with n > m in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 608 | |
b45f050a | 609 | (F) Minima must be less than or equal to maxima. If you really want your |
7253e4e3 | 610 | regexp to match something 0 times, just put {0}. The <-- HERE shows in the |
b45f050a | 611 | regular expression about where the problem was discovered. See L<perlre>. |
a0d0e21e LW |
612 | |
613 | =item Can't do setegid! | |
614 | ||
be771a83 GS |
615 | (P) The setegid() call failed for some reason in the setuid emulator of |
616 | suidperl. | |
a0d0e21e LW |
617 | |
618 | =item Can't do seteuid! | |
619 | ||
620 | (P) The setuid emulator of suidperl failed for some reason. | |
621 | ||
622 | =item Can't do setuid | |
623 | ||
be771a83 GS |
624 | (F) This typically means that ordinary perl tried to exec suidperl to do |
625 | setuid emulation, but couldn't exec it. It looks for a name of the form | |
626 | sperl5.000 in the same directory that the perl executable resides under | |
627 | the name perl5.000, typically /usr/local/bin on Unix machines. If the | |
628 | file is there, check the execute permissions. If it isn't, ask your | |
629 | sysadmin why he and/or she removed it. | |
a0d0e21e LW |
630 | |
631 | =item Can't do waitpid with flags | |
632 | ||
be771a83 GS |
633 | (F) This machine doesn't have either waitpid() or wait4(), so only |
634 | waitpid() without flags is emulated. | |
a0d0e21e | 635 | |
a0d0e21e LW |
636 | =item Can't emulate -%s on #! line |
637 | ||
be771a83 GS |
638 | (F) The #! line specifies a switch that doesn't make sense at this |
639 | point. For example, it'd be kind of silly to put a B<-x> on the #! | |
640 | line. | |
a0d0e21e | 641 | |
1109a392 MHM |
642 | =item Can't %s %s-endian %ss on this platform |
643 | ||
644 | (F) Your platform's byte-order is neither big-endian nor little-endian, | |
645 | or it has a very strange pointer size. Packing and unpacking big- or | |
646 | little-endian floating point values and pointers may not be possible. | |
647 | See L<perlfunc/pack>. | |
648 | ||
a0d0e21e LW |
649 | =item Can't exec "%s": %s |
650 | ||
d1be9408 | 651 | (W exec) A system(), exec(), or piped open call could not execute the |
be771a83 GS |
652 | named program for the indicated reason. Typical reasons include: the |
653 | permissions were wrong on the file, the file wasn't found in | |
654 | C<$ENV{PATH}>, the executable in question was compiled for another | |
655 | architecture, or the #! line in a script points to an interpreter that | |
656 | can't be run for similar reasons. (Or maybe your system doesn't support | |
657 | #! at all.) | |
a0d0e21e LW |
658 | |
659 | =item Can't exec %s | |
660 | ||
be771a83 GS |
661 | (F) Perl was trying to execute the indicated program for you because |
662 | that's what the #! line said. If that's not what you wanted, you may | |
663 | need to mention "perl" on the #! line somewhere. | |
a0d0e21e LW |
664 | |
665 | =item Can't execute %s | |
666 | ||
be771a83 GS |
667 | (F) You used the B<-S> switch, but the copies of the script to execute |
668 | found in the PATH did not have correct permissions. | |
2a92aaa0 | 669 | |
6df41af2 | 670 | =item Can't find an opnumber for "%s" |
2a92aaa0 | 671 | |
be771a83 GS |
672 | (F) A string of a form C<CORE::word> was given to prototype(), but there |
673 | is no builtin with the name C<word>. | |
6df41af2 | 674 | |
56ca2fc0 JH |
675 | =item Can't find %s character property "%s" |
676 | ||
677 | (F) You used C<\p{}> or C<\P{}> but the character property by that name | |
89d60977 | 678 | could not be found. Maybe you misspelled the name of the property |
56ca2fc0 JH |
679 | (remember that the names of character properties consist only of |
680 | alphanumeric characters), or maybe you forgot the C<Is> or C<In> prefix? | |
681 | ||
6df41af2 GS |
682 | =item Can't find label %s |
683 | ||
be771a83 GS |
684 | (F) You said to goto a label that isn't mentioned anywhere that it's |
685 | possible for us to go to. See L<perlfunc/goto>. | |
2a92aaa0 GS |
686 | |
687 | =item Can't find %s on PATH | |
688 | ||
be771a83 GS |
689 | (F) You used the B<-S> switch, but the script to execute could not be |
690 | found in the PATH. | |
a0d0e21e | 691 | |
6df41af2 | 692 | =item Can't find %s on PATH, '.' not in PATH |
a0d0e21e | 693 | |
be771a83 GS |
694 | (F) You used the B<-S> switch, but the script to execute could not be |
695 | found in the PATH, or at least not with the correct permissions. The | |
696 | script exists in the current directory, but PATH prohibits running it. | |
a0d0e21e LW |
697 | |
698 | =item Can't find string terminator %s anywhere before EOF | |
699 | ||
be771a83 GS |
700 | (F) Perl strings can stretch over multiple lines. This message means |
701 | that the closing delimiter was omitted. Because bracketed quotes count | |
702 | nesting levels, the following is missing its final parenthesis: | |
a0d0e21e | 703 | |
fb73857a | 704 | print q(The character '(' starts a side comment.); |
705 | ||
be771a83 GS |
706 | If you're getting this error from a here-document, you may have included |
707 | unseen whitespace before or after your closing tag. A good programmer's | |
708 | editor will have a way to help you find these characters. | |
a0d0e21e | 709 | |
660a4616 TS |
710 | =item Can't find Unicode property definition "%s" |
711 | ||
712 | (F) You may have tried to use C<\p> which means a Unicode property (for | |
713 | example C<\p{Lu}> is all uppercase letters). If you did mean to use a | |
714 | Unicode property, see L<perlunicode> for the list of known properties. | |
715 | If you didn't mean to use a Unicode property, escape the C<\p>, either | |
716 | by C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, until | |
717 | possible C<\E>). | |
718 | ||
a0d0e21e LW |
719 | =item Can't fork |
720 | ||
be771a83 GS |
721 | (F) A fatal error occurred while trying to fork while opening a |
722 | pipeline. | |
a0d0e21e | 723 | |
748a9306 LW |
724 | =item Can't get filespec - stale stat buffer? |
725 | ||
be771a83 GS |
726 | (S) A warning peculiar to VMS. This arises because of the difference |
727 | between access checks under VMS and under the Unix model Perl assumes. | |
728 | Under VMS, access checks are done by filename, rather than by bits in | |
729 | the stat buffer, so that ACLs and other protections can be taken into | |
730 | account. Unfortunately, Perl assumes that the stat buffer contains all | |
731 | the necessary information, and passes it, instead of the filespec, to | |
732 | the access checking routine. It will try to retrieve the filespec using | |
733 | the device name and FID present in the stat buffer, but this works only | |
734 | if you haven't made a subsequent call to the CRTL stat() routine, | |
735 | because the device name is overwritten with each call. If this warning | |
736 | appears, the name lookup failed, and the access checking routine gave up | |
737 | and returned FALSE, just to be conservative. (Note: The access checking | |
738 | routine knows about the Perl C<stat> operator and file tests, so you | |
739 | shouldn't ever see this warning in response to a Perl command; it arises | |
740 | only if some internal code takes stat buffers lightly.) | |
748a9306 | 741 | |
a0d0e21e LW |
742 | =item Can't get pipe mailbox device name |
743 | ||
be771a83 GS |
744 | (P) An error peculiar to VMS. After creating a mailbox to act as a |
745 | pipe, Perl can't retrieve its name for later use. | |
a0d0e21e LW |
746 | |
747 | =item Can't get SYSGEN parameter value for MAXBUF | |
748 | ||
748a9306 LW |
749 | (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your |
750 | mailbox buffers to be, and didn't get an answer. | |
a0d0e21e | 751 | |
6df41af2 | 752 | =item Can't "goto" into the middle of a foreach loop |
a0d0e21e | 753 | |
be771a83 GS |
754 | (F) A "goto" statement was executed to jump into the middle of a foreach |
755 | loop. You can't get there from here. See L<perlfunc/goto>. | |
6df41af2 GS |
756 | |
757 | =item Can't "goto" out of a pseudo block | |
758 | ||
be771a83 GS |
759 | (F) A "goto" statement was executed to jump out of what might look like |
760 | a block, except that it isn't a proper block. This usually occurs if | |
761 | you tried to jump out of a sort() block or subroutine, which is a no-no. | |
762 | See L<perlfunc/goto>. | |
a0d0e21e | 763 | |
9850bf21 | 764 | =item Can't goto subroutine from a sort sub (or similar callback) |
cd299c6e | 765 | |
9850bf21 RH |
766 | (F) The "goto subroutine" call can't be used to jump out of the |
767 | comparison sub for a sort(), or from a similar callback (such | |
768 | as the reduce() function in List::Util). | |
769 | ||
c74ace89 | 770 | =item Can't goto subroutine from an eval-%s |
b150fb22 | 771 | |
be771a83 | 772 | (F) The "goto subroutine" call can't be used to jump out of an eval |
c74ace89 | 773 | "string" or block. |
b150fb22 | 774 | |
6df41af2 GS |
775 | =item Can't goto subroutine outside a subroutine |
776 | ||
be771a83 GS |
777 | (F) The deeply magical "goto subroutine" call can only replace one |
778 | subroutine call for another. It can't manufacture one out of whole | |
779 | cloth. In general you should be calling it out of only an AUTOLOAD | |
780 | routine anyway. See L<perlfunc/goto>. | |
6df41af2 | 781 | |
0b5b802d GS |
782 | =item Can't ignore signal CHLD, forcing to default |
783 | ||
be771a83 GS |
784 | (W signal) Perl has detected that it is being run with the SIGCHLD |
785 | signal (sometimes known as SIGCLD) disabled. Since disabling this | |
786 | signal will interfere with proper determination of exit status of child | |
787 | processes, Perl has reset the signal to its default value. This | |
788 | situation typically indicates that the parent program under which Perl | |
789 | may be running (e.g. cron) is being very careless. | |
0b5b802d | 790 | |
6df41af2 | 791 | =item Can't "last" outside a loop block |
4633a7c4 | 792 | |
6df41af2 | 793 | (F) A "last" statement was executed to break out of the current block, |
be771a83 GS |
794 | except that there's this itty bitty problem called there isn't a current |
795 | block. Note that an "if" or "else" block doesn't count as a "loopish" | |
796 | block, as doesn't a block given to sort(), map() or grep(). You can | |
797 | usually double the curlies to get the same effect though, because the | |
798 | inner curlies will be considered a block that loops once. See | |
799 | L<perlfunc/last>. | |
4633a7c4 | 800 | |
b8170e59 JB |
801 | =item Can't load '%s' for module %s |
802 | ||
803 | (F) The module you tried to load failed to load a dynamic extension. This | |
804 | may either mean that you upgraded your version of perl to one that is | |
805 | incompatible with your old dynamic extensions (which is known to happen | |
806 | between major versions of perl), or (more likely) that your dynamic | |
16d98ec5 | 807 | extension was built against an older version of the library that is |
b8170e59 JB |
808 | installed on your system. You may need to rebuild your old dynamic |
809 | extensions. | |
810 | ||
748a9306 LW |
811 | =item Can't localize lexical variable %s |
812 | ||
2ba9eb46 | 813 | (F) You used local on a variable name that was previously declared as a |
748a9306 LW |
814 | lexical variable using "my". This is not allowed. If you want to |
815 | localize a package variable of the same name, qualify it with the | |
816 | package name. | |
817 | ||
6df41af2 | 818 | =item Can't localize through a reference |
4727527e | 819 | |
6df41af2 GS |
820 | (F) You said something like C<local $$ref>, which Perl can't currently |
821 | handle, because when it goes to restore the old value of whatever $ref | |
be771a83 | 822 | pointed to after the scope of the local() is finished, it can't be sure |
64977eb6 | 823 | that $ref will still be a reference. |
4727527e | 824 | |
ea071790 | 825 | =item Can't locate %s |
ec889f3a GS |
826 | |
827 | (F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be | |
828 | found. Perl looks for the file in all the locations mentioned in @INC, | |
be771a83 GS |
829 | unless the file name included the full path to the file. Perhaps you |
830 | need to set the PERL5LIB or PERL5OPT environment variable to say where | |
831 | the extra library is, or maybe the script needs to add the library name | |
832 | to @INC. Or maybe you just misspelled the name of the file. See | |
833 | L<perlfunc/require> and L<lib>. | |
a0d0e21e | 834 | |
6df41af2 GS |
835 | =item Can't locate auto/%s.al in @INC |
836 | ||
be771a83 GS |
837 | (F) A function (or method) was called in a package which allows |
838 | autoload, but there is no function to autoload. Most probable causes | |
839 | are a misprint in a function/method name or a failure to C<AutoSplit> | |
840 | the file, say, by doing C<make install>. | |
6df41af2 | 841 | |
b8170e59 JB |
842 | =item Can't locate loadable object for module %s in @INC |
843 | ||
844 | (F) The module you loaded is trying to load an external library, like | |
845 | for example, C<foo.so> or C<bar.dll>, but the L<DynaLoader> module was | |
846 | unable to locate this library. See L<DynaLoader>. | |
847 | ||
a0d0e21e LW |
848 | =item Can't locate object method "%s" via package "%s" |
849 | ||
850 | (F) You called a method correctly, and it correctly indicated a package | |
851 | functioning as a class, but that package doesn't define that particular | |
2ba9eb46 | 852 | method, nor does any of its base classes. See L<perlobj>. |
a0d0e21e LW |
853 | |
854 | =item Can't locate package %s for @%s::ISA | |
855 | ||
be771a83 GS |
856 | (W syntax) The @ISA array contained the name of another package that |
857 | doesn't seem to exist. | |
a0d0e21e | 858 | |
2f7da168 RK |
859 | =item Can't locate PerlIO%s |
860 | ||
861 | (F) You tried to use in open() a PerlIO layer that does not exist, | |
862 | e.g. open(FH, ">:nosuchlayer", "somefile"). | |
863 | ||
3e3baf6d TB |
864 | =item Can't make list assignment to \%ENV on this system |
865 | ||
be771a83 GS |
866 | (F) List assignment to %ENV is not supported on some systems, notably |
867 | VMS. | |
3e3baf6d | 868 | |
a0d0e21e LW |
869 | =item Can't modify %s in %s |
870 | ||
be771a83 GS |
871 | (F) You aren't allowed to assign to the item indicated, or otherwise try |
872 | to change it, such as with an auto-increment. | |
a0d0e21e | 873 | |
54310121 | 874 | =item Can't modify nonexistent substring |
a0d0e21e LW |
875 | |
876 | (P) The internal routine that does assignment to a substr() was handed | |
877 | a NULL. | |
878 | ||
6df41af2 GS |
879 | =item Can't modify non-lvalue subroutine call |
880 | ||
881 | (F) Subroutines meant to be used in lvalue context should be declared as | |
882 | such, see L<perlsub/"Lvalue subroutines">. | |
883 | ||
5f05dabc | 884 | =item Can't msgrcv to read-only var |
a0d0e21e | 885 | |
5f05dabc | 886 | (F) The target of a msgrcv must be modifiable to be used as a receive |
a0d0e21e LW |
887 | buffer. |
888 | ||
6df41af2 GS |
889 | =item Can't "next" outside a loop block |
890 | ||
891 | (F) A "next" statement was executed to reiterate the current block, but | |
892 | there isn't a current block. Note that an "if" or "else" block doesn't | |
be771a83 GS |
893 | count as a "loopish" block, as doesn't a block given to sort(), map() or |
894 | grep(). You can usually double the curlies to get the same effect | |
895 | though, because the inner curlies will be considered a block that loops | |
896 | once. See L<perlfunc/next>. | |
6df41af2 | 897 | |
a0d0e21e LW |
898 | =item Can't open %s: %s |
899 | ||
c47ff5f1 | 900 | (S inplace) The implicit opening of a file through use of the C<< <> >> |
08e9d68e DD |
901 | filehandle, either implicitly under the C<-n> or C<-p> command-line |
902 | switches, or explicitly, failed for the indicated reason. Usually this | |
be771a83 GS |
903 | is because you don't have read permission for a file which you named on |
904 | the command line. | |
a0d0e21e | 905 | |
9a869a14 RGS |
906 | =item Can't open a reference |
907 | ||
908 | (W io) You tried to open a scalar reference for reading or writing, | |
909 | using the 3-arg open() syntax : | |
910 | ||
911 | open FH, '>', $ref; | |
912 | ||
913 | but your version of perl is compiled without perlio, and this form of | |
914 | open is not supported. | |
915 | ||
a0d0e21e LW |
916 | =item Can't open bidirectional pipe |
917 | ||
be771a83 GS |
918 | (W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported. |
919 | You can try any of several modules in the Perl library to do this, such | |
920 | as IPC::Open2. Alternately, direct the pipe's output to a file using | |
921 | ">", and then read it in under a different file handle. | |
a0d0e21e | 922 | |
748a9306 LW |
923 | =item Can't open error file %s as stderr |
924 | ||
be771a83 GS |
925 | (F) An error peculiar to VMS. Perl does its own command line |
926 | redirection, and couldn't open the file specified after '2>' or '2>>' on | |
927 | the command line for writing. | |
748a9306 LW |
928 | |
929 | =item Can't open input file %s as stdin | |
930 | ||
be771a83 GS |
931 | (F) An error peculiar to VMS. Perl does its own command line |
932 | redirection, and couldn't open the file specified after '<' on the | |
933 | command line for reading. | |
748a9306 LW |
934 | |
935 | =item Can't open output file %s as stdout | |
936 | ||
be771a83 GS |
937 | (F) An error peculiar to VMS. Perl does its own command line |
938 | redirection, and couldn't open the file specified after '>' or '>>' on | |
939 | the command line for writing. | |
748a9306 LW |
940 | |
941 | =item Can't open output pipe (name: %s) | |
942 | ||
be771a83 GS |
943 | (P) An error peculiar to VMS. Perl does its own command line |
944 | redirection, and couldn't open the pipe into which to send data destined | |
945 | for stdout. | |
748a9306 | 946 | |
2b8ca739 | 947 | =item Can't open perl script%s |
a0d0e21e LW |
948 | |
949 | (F) The script you specified can't be opened for the indicated reason. | |
950 | ||
fa3aa65a JC |
951 | If you're debugging a script that uses #!, and normally relies on the |
952 | shell's $PATH search, the -S option causes perl to do that search, so | |
953 | you don't have to type the path or C<`which $scriptname`>. | |
954 | ||
6df41af2 GS |
955 | =item Can't read CRTL environ |
956 | ||
957 | (S) A warning peculiar to VMS. Perl tried to read an element of %ENV | |
958 | from the CRTL's internal environment array and discovered the array was | |
959 | missing. You need to figure out where your CRTL misplaced its environ | |
be771a83 GS |
960 | or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not |
961 | searched. | |
6df41af2 | 962 | |
6df41af2 GS |
963 | =item Can't "redo" outside a loop block |
964 | ||
965 | (F) A "redo" statement was executed to restart the current block, but | |
966 | there isn't a current block. Note that an "if" or "else" block doesn't | |
967 | count as a "loopish" block, as doesn't a block given to sort(), map() | |
968 | or grep(). You can usually double the curlies to get the same effect | |
969 | though, because the inner curlies will be considered a block that | |
970 | loops once. See L<perlfunc/redo>. | |
971 | ||
64977eb6 | 972 | =item Can't remove %s: %s, skipping file |
10f9c03d | 973 | |
be771a83 GS |
974 | (S inplace) You requested an inplace edit without creating a backup |
975 | file. Perl was unable to remove the original file to replace it with | |
976 | the modified file. The file was left unmodified. | |
10f9c03d | 977 | |
a0d0e21e LW |
978 | =item Can't rename %s to %s: %s, skipping file |
979 | ||
e476b1b5 | 980 | (S inplace) The rename done by the B<-i> switch failed for some reason, |
10f9c03d | 981 | probably because you don't have write permission to the directory. |
a0d0e21e | 982 | |
748a9306 LW |
983 | =item Can't reopen input pipe (name: %s) in binary mode |
984 | ||
be771a83 GS |
985 | (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried |
986 | to reopen it to accept binary data. Alas, it failed. | |
748a9306 | 987 | |
6df41af2 GS |
988 | =item Can't resolve method `%s' overloading `%s' in package `%s' |
989 | ||
be771a83 GS |
990 | (F|P) Error resolving overloading specified by a method name (as opposed |
991 | to a subroutine reference): no such method callable via the package. If | |
992 | method name is C<???>, this is an internal error. | |
6df41af2 | 993 | |
a0d0e21e LW |
994 | =item Can't reswap uid and euid |
995 | ||
be771a83 GS |
996 | (P) The setreuid() call failed for some reason in the setuid emulator of |
997 | suidperl. | |
a0d0e21e | 998 | |
cd06dffe GS |
999 | =item Can't return %s from lvalue subroutine |
1000 | ||
be771a83 GS |
1001 | (F) Perl detected an attempt to return illegal lvalues (such as |
1002 | temporary or readonly values) from a subroutine used as an lvalue. This | |
1003 | is not allowed. | |
cd06dffe | 1004 | |
96ebfdd7 RK |
1005 | =item Can't return outside a subroutine |
1006 | ||
1007 | (F) The return statement was executed in mainline code, that is, where | |
1008 | there was no subroutine call to return out of. See L<perlsub>. | |
1009 | ||
78f9721b SM |
1010 | =item Can't return %s to lvalue scalar context |
1011 | ||
1012 | (F) You tried to return a complete array or hash from an lvalue subroutine, | |
1013 | but you called the subroutine in a way that made Perl think you meant | |
1014 | to return only one value. You probably meant to write parentheses around | |
1015 | the call to the subroutine, which tell Perl that the call should be in | |
1016 | list context. | |
1017 | ||
a0d0e21e LW |
1018 | =item Can't stat script "%s" |
1019 | ||
be771a83 GS |
1020 | (P) For some reason you can't fstat() the script even though you have it |
1021 | open already. Bizarre. | |
a0d0e21e LW |
1022 | |
1023 | =item Can't swap uid and euid | |
1024 | ||
be771a83 GS |
1025 | (P) The setreuid() call failed for some reason in the setuid emulator of |
1026 | suidperl. | |
a0d0e21e LW |
1027 | |
1028 | =item Can't take log of %g | |
1029 | ||
fb73857a | 1030 | (F) For ordinary real numbers, you can't take the logarithm of a |
1031 | negative number or zero. There's a Math::Complex package that comes | |
be771a83 GS |
1032 | standard with Perl, though, if you really want to do that for the |
1033 | negative numbers. | |
a0d0e21e LW |
1034 | |
1035 | =item Can't take sqrt of %g | |
1036 | ||
1037 | (F) For ordinary real numbers, you can't take the square root of a | |
fb73857a | 1038 | negative number. There's a Math::Complex package that comes standard |
1039 | with Perl, though, if you really want to do that. | |
a0d0e21e LW |
1040 | |
1041 | =item Can't undef active subroutine | |
1042 | ||
1043 | (F) You can't undefine a routine that's currently running. You can, | |
1044 | however, redefine it while it's running, and you can even undef the | |
1045 | redefined subroutine while the old routine is running. Go figure. | |
1046 | ||
1047 | =item Can't unshift | |
1048 | ||
1049 | (F) You tried to unshift an "unreal" array that can't be unshifted, such | |
1050 | as the main Perl stack. | |
1051 | ||
1052 | =item Can't upgrade that kind of scalar | |
1053 | ||
be771a83 GS |
1054 | (P) The internal sv_upgrade routine adds "members" to an SV, making it |
1055 | into a more specialized kind of SV. The top several SV types are so | |
1056 | specialized, however, that they cannot be interconverted. This message | |
1057 | indicates that such a conversion was attempted. | |
a0d0e21e LW |
1058 | |
1059 | =item Can't upgrade to undef | |
1060 | ||
be771a83 GS |
1061 | (P) The undefined SV is the bottom of the totem pole, in the scheme of |
1062 | upgradability. Upgrading to undef indicates an error in the code | |
1063 | calling sv_upgrade. | |
a0d0e21e | 1064 | |
1db89ea5 BS |
1065 | =item Can't use anonymous symbol table for method lookup |
1066 | ||
e27ad1f2 | 1067 | (F) The internal routine that does method lookup was handed a symbol |
1db89ea5 BS |
1068 | table that doesn't have a name. Symbol tables can become anonymous |
1069 | for example by undefining stashes: C<undef %Some::Package::>. | |
1070 | ||
96ebfdd7 RK |
1071 | =item Can't use an undefined value as %s reference |
1072 | ||
1073 | (F) A value used as either a hard reference or a symbolic reference must | |
1074 | be a defined value. This helps to delurk some insidious errors. | |
1075 | ||
6df41af2 GS |
1076 | =item Can't use bareword ("%s") as %s ref while "strict refs" in use |
1077 | ||
be771a83 GS |
1078 | (F) Only hard references are allowed by "strict refs". Symbolic |
1079 | references are disallowed. See L<perlref>. | |
6df41af2 | 1080 | |
90b75b61 | 1081 | =item Can't use %! because Errno.pm is not available |
1d2dff63 GS |
1082 | |
1083 | (F) The first time the %! hash is used, perl automatically loads the | |
1084 | Errno.pm module. The Errno module is expected to tie the %! hash to | |
1085 | provide symbolic names for C<$!> errno values. | |
1086 | ||
1109a392 MHM |
1087 | =item Can't use both '<' and '>' after type '%c' in %s |
1088 | ||
1089 | (F) A type cannot be forced to have both big-endian and little-endian | |
1090 | byte-order at the same time, so this combination of modifiers is not | |
1091 | allowed. See L<perlfunc/pack>. | |
1092 | ||
6df41af2 GS |
1093 | =item Can't use %s for loop variable |
1094 | ||
be771a83 GS |
1095 | (F) Only a simple scalar variable may be used as a loop variable on a |
1096 | foreach. | |
6df41af2 GS |
1097 | |
1098 | =item Can't use global %s in "my" | |
1099 | ||
be771a83 GS |
1100 | (F) You tried to declare a magical variable as a lexical variable. This |
1101 | is not allowed, because the magic can be tied to only one location | |
1102 | (namely the global variable) and it would be incredibly confusing to | |
1103 | have variables in your program that looked like magical variables but | |
6df41af2 GS |
1104 | weren't. |
1105 | ||
6d3b25aa RGS |
1106 | =item Can't use '%c' in a group with different byte-order in %s |
1107 | ||
1108 | (F) You attempted to force a different byte-order on a type | |
1109 | that is already inside a group with a byte-order modifier. | |
1110 | For example you cannot force little-endianness on a type that | |
1111 | is inside a big-endian group. | |
1112 | ||
c07a80fd | 1113 | =item Can't use "my %s" in sort comparison |
1114 | ||
1115 | (F) The global variables $a and $b are reserved for sort comparisons. | |
c47ff5f1 | 1116 | You mentioned $a or $b in the same line as the <=> or cmp operator, |
c07a80fd | 1117 | and the variable had earlier been declared as a lexical variable. |
1118 | Either qualify the sort variable with the package name, or rename the | |
1119 | lexical variable. | |
1120 | ||
a0d0e21e LW |
1121 | =item Can't use %s ref as %s ref |
1122 | ||
1123 | (F) You've mixed up your reference types. You have to dereference a | |
1124 | reference of the type needed. You can use the ref() function to | |
1125 | test the type of the reference, if need be. | |
1126 | ||
748a9306 | 1127 | =item Can't use string ("%s") as %s ref while "strict refs" in use |
a0d0e21e | 1128 | |
be771a83 GS |
1129 | (F) Only hard references are allowed by "strict refs". Symbolic |
1130 | references are disallowed. See L<perlref>. | |
a0d0e21e | 1131 | |
748a9306 LW |
1132 | =item Can't use subscript on %s |
1133 | ||
1134 | (F) The compiler tried to interpret a bracketed expression as a | |
1135 | subscript. But to the left of the brackets was an expression that | |
209e7cf1 | 1136 | didn't look like a hash or array reference, or anything else subscriptable. |
748a9306 | 1137 | |
6df41af2 GS |
1138 | =item Can't use \%c to mean $%c in expression |
1139 | ||
75b44862 GS |
1140 | (W syntax) In an ordinary expression, backslash is a unary operator that |
1141 | creates a reference to its argument. The use of backslash to indicate a | |
1142 | backreference to a matched substring is valid only as part of a regular | |
be771a83 GS |
1143 | expression pattern. Trying to do this in ordinary Perl code produces a |
1144 | value that prints out looking like SCALAR(0xdecaf). Use the $1 form | |
1145 | instead. | |
6df41af2 | 1146 | |
810b8aa5 GS |
1147 | =item Can't weaken a nonreference |
1148 | ||
1149 | (F) You attempted to weaken something that was not a reference. Only | |
1150 | references can be weakened. | |
1151 | ||
5f05dabc | 1152 | =item Can't x= to read-only value |
a0d0e21e | 1153 | |
be771a83 GS |
1154 | (F) You tried to repeat a constant value (often the undefined value) |
1155 | with an assignment operator, which implies modifying the value itself. | |
a0d0e21e LW |
1156 | Perhaps you need to copy the value to a temporary, and repeat that. |
1157 | ||
f337b084 | 1158 | =item Character in 'C' format wrapped in pack |
ac7cd81a SC |
1159 | |
1160 | (W pack) You said | |
1161 | ||
1162 | pack("C", $x) | |
1163 | ||
1164 | where $x is either less than 0 or more than 255; the C<"C"> format is | |
1165 | only for encoding native operating system characters (ASCII, EBCDIC, | |
1166 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1167 | ||
1168 | pack("C", $x & 255) | |
1169 | ||
1170 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1171 | instead. | |
1172 | ||
f337b084 TH |
1173 | =item Character in 'W' format wrapped in pack |
1174 | ||
1175 | (W pack) You said | |
1176 | ||
1177 | pack("U0W", $x) | |
1178 | ||
1179 | where $x is either less than 0 or more than 255. However, C<U0>-mode expects | |
1180 | all values to fall in the interval [0, 255], so Perl behaved as if you | |
1181 | meant: | |
1182 | ||
1183 | pack("U0W", $x & 255) | |
1184 | ||
1185 | =item Character in 'c' format wrapped in pack | |
ac7cd81a SC |
1186 | |
1187 | (W pack) You said | |
1188 | ||
1189 | pack("c", $x) | |
1190 | ||
1191 | where $x is either less than -128 or more than 127; the C<"c"> format | |
1192 | is only for encoding native operating system characters (ASCII, EBCDIC, | |
1193 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1194 | ||
1195 | pack("c", $x & 255); | |
1196 | ||
1197 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1198 | instead. | |
1199 | ||
f337b084 TH |
1200 | =item Character in '%c' format wrapped in unpack |
1201 | ||
1202 | (W unpack) You tried something like | |
1203 | ||
1204 | unpack("H", "\x{2a1}") | |
1205 | ||
1206 | where the format expects to process a byte (a character with a value | |
1207 | below 256), but a higher value was provided instead. Perl uses the value | |
1208 | modulus 256 instead, as if you had provided: | |
1209 | ||
1210 | unpack("H", "\x{a1}") | |
1211 | ||
1212 | =item Character(s) in '%c' format wrapped in pack | |
1213 | ||
1214 | (W pack) You tried something like | |
1215 | ||
1216 | pack("u", "\x{1f3}b") | |
1217 | ||
1218 | where the format expects to process a sequence of bytes (character with a | |
1219 | value below 256), but some of the characters had a higher value. Perl | |
1220 | uses the character values modulus 256 instead, as if you had provided: | |
1221 | ||
1222 | pack("u", "\x{f3}b") | |
1223 | ||
1224 | =item Character(s) in '%c' format wrapped in unpack | |
1225 | ||
1226 | (W unpack) You tried something like | |
1227 | ||
1228 | unpack("s", "\x{1f3}b") | |
1229 | ||
1230 | where the format expects to process a sequence of bytes (character with a | |
1231 | value below 256), but some of the characters had a higher value. Perl | |
1232 | uses the character values modulus 256 instead, as if you had provided: | |
1233 | ||
1234 | unpack("s", "\x{f3}b") | |
1235 | ||
96ebfdd7 RK |
1236 | =item close() on unopened filehandle %s |
1237 | ||
1238 | (W unopened) You tried to close a filehandle that was never opened. | |
1239 | ||
49704364 WL |
1240 | =item Code missing after '/' |
1241 | ||
1242 | (F) You had a (sub-)template that ends with a '/'. There must be another | |
1243 | template code following the slash. See L<perlfunc/pack>. | |
1244 | ||
6df41af2 GS |
1245 | =item %s: Command not found |
1246 | ||
be771a83 GS |
1247 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1248 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 1249 | |
7a2e2cd6 | 1250 | =item Compilation failed in require |
1251 | ||
1252 | (F) Perl could not compile a file specified in a C<require> statement. | |
be771a83 GS |
1253 | Perl uses this generic message when none of the errors that it |
1254 | encountered were severe enough to halt compilation immediately. | |
7a2e2cd6 | 1255 | |
c3464db5 DD |
1256 | =item Complex regular subexpression recursion limit (%d) exceeded |
1257 | ||
be771a83 GS |
1258 | (W regexp) The regular expression engine uses recursion in complex |
1259 | situations where back-tracking is required. Recursion depth is limited | |
1260 | to 32766, or perhaps less in architectures where the stack cannot grow | |
1261 | arbitrarily. ("Simple" and "medium" situations are handled without | |
1262 | recursion and are not subject to a limit.) Try shortening the string | |
1263 | under examination; looping in Perl code (e.g. with C<while>) rather than | |
1264 | in the regular expression engine; or rewriting the regular expression so | |
c2e66d9e | 1265 | that it is simpler or backtracks less. (See L<perlfaq2> for information |
be771a83 | 1266 | on I<Mastering Regular Expressions>.) |
c3464db5 | 1267 | |
38875929 DM |
1268 | =item cond_broadcast() called on unlocked variable |
1269 | ||
1270 | (W threads) Within a thread-enabled program, you tried to call | |
1271 | cond_broadcast() on a variable which wasn't locked. The cond_broadcast() | |
1272 | function is used to wake up another thread that is waiting in a | |
1273 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1274 | has a chance to enter the wait, it is usual for the signaling thread to | |
1275 | first wait for a lock on variable. This lock attempt will only succeed | |
1276 | after the other thread has entered cond_wait() and thus relinquished the | |
1277 | lock. | |
1278 | ||
38875929 DM |
1279 | =item cond_signal() called on unlocked variable |
1280 | ||
1281 | (W threads) Within a thread-enabled program, you tried to call | |
1282 | cond_signal() on a variable which wasn't locked. The cond_signal() | |
1283 | function is used to wake up another thread that is waiting in a | |
1284 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1285 | has a chance to enter the wait, it is usual for the signaling thread to | |
1286 | first wait for a lock on variable. This lock attempt will only succeed | |
1287 | after the other thread has entered cond_wait() and thus relinquished the | |
1288 | lock. | |
1289 | ||
69282e91 | 1290 | =item connect() on closed socket %s |
a0d0e21e | 1291 | |
be771a83 GS |
1292 | (W closed) You tried to do a connect on a closed socket. Did you forget |
1293 | to check the return value of your socket() call? See | |
1294 | L<perlfunc/connect>. | |
a0d0e21e | 1295 | |
41ab332f | 1296 | =item Constant(%s)%s: %s |
6df41af2 | 1297 | |
be771a83 GS |
1298 | (F) The parser found inconsistencies either while attempting to define |
1299 | an overloaded constant, or when trying to find the character name | |
1300 | specified in the C<\N{...}> escape. Perhaps you forgot to load the | |
1301 | corresponding C<overload> or C<charnames> pragma? See L<charnames> and | |
1302 | L<overload>. | |
6df41af2 | 1303 | |
779c5bc9 GS |
1304 | =item Constant is not %s reference |
1305 | ||
1306 | (F) A constant value (perhaps declared using the C<use constant> pragma) | |
be771a83 GS |
1307 | is being dereferenced, but it amounts to the wrong type of reference. |
1308 | The message indicates the type of reference that was expected. This | |
1309 | usually indicates a syntax error in dereferencing the constant value. | |
779c5bc9 GS |
1310 | See L<perlsub/"Constant Functions"> and L<constant>. |
1311 | ||
4cee8e80 CS |
1312 | =item Constant subroutine %s redefined |
1313 | ||
bb028877 | 1314 | (S) You redefined a subroutine which had previously been |
be771a83 GS |
1315 | eligible for inlining. See L<perlsub/"Constant Functions"> for |
1316 | commentary and workarounds. | |
4cee8e80 | 1317 | |
9607fc9c | 1318 | =item Constant subroutine %s undefined |
1319 | ||
be771a83 GS |
1320 | (W misc) You undefined a subroutine which had previously been eligible |
1321 | for inlining. See L<perlsub/"Constant Functions"> for commentary and | |
1322 | workarounds. | |
9607fc9c | 1323 | |
e7ea3e70 IZ |
1324 | =item Copy method did not return a reference |
1325 | ||
64977eb6 | 1326 | (F) The method which overloads "=" is buggy. See |
13a2d996 | 1327 | L<overload/Copy Constructor>. |
e7ea3e70 | 1328 | |
6798c92b GS |
1329 | =item CORE::%s is not a keyword |
1330 | ||
1331 | (F) The CORE:: namespace is reserved for Perl keywords. | |
1332 | ||
a0d0e21e LW |
1333 | =item corrupted regexp pointers |
1334 | ||
1335 | (P) The regular expression engine got confused by what the regular | |
1336 | expression compiler gave it. | |
1337 | ||
1338 | =item corrupted regexp program | |
1339 | ||
be771a83 GS |
1340 | (P) The regular expression engine got passed a regexp program without a |
1341 | valid magic number. | |
a0d0e21e | 1342 | |
6df41af2 GS |
1343 | =item Corrupt malloc ptr 0x%lx at 0x%lx |
1344 | ||
1345 | (P) The malloc package that comes with Perl had an internal failure. | |
1346 | ||
49704364 WL |
1347 | =item Count after length/code in unpack |
1348 | ||
1349 | (F) You had an unpack template indicating a counted-length string, but | |
1350 | you have also specified an explicit size for the string. See | |
1351 | L<perlfunc/pack>. | |
1352 | ||
a0d0e21e LW |
1353 | =item Deep recursion on subroutine "%s" |
1354 | ||
be771a83 GS |
1355 | (W recursion) This subroutine has called itself (directly or indirectly) |
1356 | 100 times more than it has returned. This probably indicates an | |
1357 | infinite recursion, unless you're writing strange benchmark programs, in | |
1358 | which case it indicates something else. | |
a0d0e21e | 1359 | |
f10b0346 | 1360 | =item defined(@array) is deprecated |
69794302 | 1361 | |
be771a83 GS |
1362 | (D deprecated) defined() is not usually useful on arrays because it |
1363 | checks for an undefined I<scalar> value. If you want to see if the | |
64977eb6 | 1364 | array is empty, just use C<if (@array) { # not empty }> for example. |
69794302 | 1365 | |
f10b0346 | 1366 | =item defined(%hash) is deprecated |
69794302 | 1367 | |
be771a83 GS |
1368 | (D deprecated) defined() is not usually useful on hashes because it |
1369 | checks for an undefined I<scalar> value. If you want to see if the hash | |
64977eb6 | 1370 | is empty, just use C<if (%hash) { # not empty }> for example. |
69794302 | 1371 | |
62658f4d PM |
1372 | =item %s defines neither package nor VERSION--version check failed |
1373 | ||
1374 | (F) You said something like "use Module 42" but in the Module file | |
1375 | there are neither package declarations nor a C<$VERSION>. | |
1376 | ||
fc36a67e | 1377 | =item Delimiter for here document is too long |
1378 | ||
be771a83 GS |
1379 | (F) In a here document construct like C<<<FOO>, the label C<FOO> is too |
1380 | long for Perl to handle. You have to be seriously twisted to write code | |
1381 | that triggers this error. | |
fc36a67e | 1382 | |
6d3b25aa RGS |
1383 | =item Deprecated use of my() in false conditional |
1384 | ||
1385 | (D deprecated) You used a declaration similar to C<my $x if 0>. | |
1386 | There has been a long-standing bug in Perl that causes a lexical variable | |
1387 | not to be cleared at scope exit when its declaration includes a false | |
1388 | conditional. Some people have exploited this bug to achieve a kind of | |
1389 | static variable. Since we intend to fix this bug, we don't want people | |
1390 | relying on this behavior. You can achieve a similar static effect by | |
1391 | declaring the variable in a separate block outside the function, eg | |
1392 | ||
1393 | sub f { my $x if 0; return $x++ } | |
1394 | ||
1395 | becomes | |
1396 | ||
1397 | { my $x; sub f { return $x++ } } | |
1398 | ||
500ab966 RGS |
1399 | =item DESTROY created new reference to dead object '%s' |
1400 | ||
1401 | (F) A DESTROY() method created a new reference to the object which is | |
1402 | just being DESTROYed. Perl is confused, and prefers to abort rather than | |
1403 | to create a dangling reference. | |
1404 | ||
3cdd684c TP |
1405 | =item Did not produce a valid header |
1406 | ||
1407 | See Server error. | |
1408 | ||
6df41af2 GS |
1409 | =item %s did not return a true value |
1410 | ||
1411 | (F) A required (or used) file must return a true value to indicate that | |
1412 | it compiled correctly and ran its initialization code correctly. It's | |
1413 | traditional to end such a file with a "1;", though any true value would | |
1414 | do. See L<perlfunc/require>. | |
1415 | ||
cc507455 | 1416 | =item (Did you mean &%s instead?) |
4633a7c4 | 1417 | |
be771a83 GS |
1418 | (W) You probably referred to an imported subroutine &FOO as $FOO or some |
1419 | such. | |
4633a7c4 | 1420 | |
cc507455 | 1421 | =item (Did you mean "local" instead of "our"?) |
33633739 | 1422 | |
be771a83 GS |
1423 | (W misc) Remember that "our" does not localize the declared global |
1424 | variable. You have declared it again in the same lexical scope, which | |
1425 | seems superfluous. | |
33633739 | 1426 | |
cc507455 | 1427 | =item (Did you mean $ or @ instead of %?) |
a0d0e21e | 1428 | |
be771a83 GS |
1429 | (W) You probably said %hash{$key} when you meant $hash{$key} or |
1430 | @hash{@keys}. On the other hand, maybe you just meant %hash and got | |
1431 | carried away. | |
748a9306 | 1432 | |
7e1af8bc | 1433 | =item Died |
5f05dabc | 1434 | |
1435 | (F) You passed die() an empty string (the equivalent of C<die "">) or | |
1436 | you called it with no args and both C<$@> and C<$_> were empty. | |
1437 | ||
3cdd684c TP |
1438 | =item Document contains no data |
1439 | ||
1440 | See Server error. | |
1441 | ||
62658f4d PM |
1442 | =item %s does not define %s::VERSION--version check failed |
1443 | ||
1444 | (F) You said something like "use Module 42" but the Module did not | |
1445 | define a C<$VERSION.> | |
1446 | ||
49704364 WL |
1447 | =item '/' does not take a repeat count |
1448 | ||
1449 | (F) You cannot put a repeat count of any kind right after the '/' code. | |
1450 | See L<perlfunc/pack>. | |
1451 | ||
a0d0e21e LW |
1452 | =item Don't know how to handle magic of type '%s' |
1453 | ||
1454 | (P) The internal handling of magical variables has been cursed. | |
1455 | ||
1456 | =item do_study: out of memory | |
1457 | ||
1458 | (P) This should have been caught by safemalloc() instead. | |
1459 | ||
6df41af2 GS |
1460 | =item (Do you need to predeclare %s?) |
1461 | ||
56da5a46 RGS |
1462 | (S syntax) This is an educated guess made in conjunction with the message |
1463 | "%s found where operator expected". It often means a subroutine or module | |
6df41af2 GS |
1464 | name is being referenced that hasn't been declared yet. This may be |
1465 | because of ordering problems in your file, or because of a missing | |
be771a83 GS |
1466 | "sub", "package", "require", or "use" statement. If you're referencing |
1467 | something that isn't defined yet, you don't actually have to define the | |
1468 | subroutine or package before the current location. You can use an empty | |
1469 | "sub foo;" or "package FOO;" to enter a "forward" declaration. | |
6df41af2 | 1470 | |
ac206dc8 RGS |
1471 | =item dump() better written as CORE::dump() |
1472 | ||
1473 | (W misc) You used the obsolescent C<dump()> built-in function, without fully | |
1474 | qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>. | |
1475 | ||
a0d0e21e LW |
1476 | =item Duplicate free() ignored |
1477 | ||
be771a83 GS |
1478 | (S malloc) An internal routine called free() on something that had |
1479 | already been freed. | |
a0d0e21e | 1480 | |
1109a392 MHM |
1481 | =item Duplicate modifier '%c' after '%c' in %s |
1482 | ||
1483 | (W) You have applied the same modifier more than once after a type | |
1484 | in a pack template. See L<perlfunc/pack>. | |
1485 | ||
4633a7c4 LW |
1486 | =item elseif should be elsif |
1487 | ||
56da5a46 RGS |
1488 | (S syntax) There is no keyword "elseif" in Perl because Larry thinks it's |
1489 | ugly. Your code will be interpreted as an attempt to call a method named | |
be771a83 | 1490 | "elseif" for the class returned by the following block. This is |
4633a7c4 LW |
1491 | unlikely to be what you want. |
1492 | ||
ab13f0c7 JH |
1493 | =item Empty %s |
1494 | ||
af6f566e HS |
1495 | (F) C<\p> and C<\P> are used to introduce a named Unicode property, as |
1496 | described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in | |
1497 | a regular expression without specifying the property name. | |
ab13f0c7 | 1498 | |
85ab1d1d | 1499 | =item entering effective %s failed |
5ff3f7a4 | 1500 | |
85ab1d1d | 1501 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
1502 | effective uids or gids failed. |
1503 | ||
c038024b RGS |
1504 | =item %ENV is aliased to %s |
1505 | ||
1506 | (F) You're running under taint mode, and the C<%ENV> variable has been | |
1507 | aliased to another hash, so it doesn't reflect anymore the state of the | |
1508 | program's environment. This is potentially insecure. | |
1509 | ||
748a9306 LW |
1510 | =item Error converting file specification %s |
1511 | ||
5f05dabc | 1512 | (F) An error peculiar to VMS. Because Perl may have to deal with file |
748a9306 | 1513 | specifications in either VMS or Unix syntax, it converts them to a |
be771a83 GS |
1514 | single form when it must operate on them directly. Either you've passed |
1515 | an invalid file specification to Perl, or you've found a case the | |
1516 | conversion routines don't handle. Drat. | |
748a9306 | 1517 | |
e4d48cc9 GS |
1518 | =item %s: Eval-group in insecure regular expression |
1519 | ||
be771a83 GS |
1520 | (F) Perl detected tainted data when trying to compile a regular |
1521 | expression that contains the C<(?{ ... })> zero-width assertion, which | |
1522 | is unsafe. See L<perlre/(?{ code })>, and L<perlsec>. | |
e4d48cc9 | 1523 | |
e4d48cc9 GS |
1524 | =item %s: Eval-group not allowed at run time |
1525 | ||
be771a83 GS |
1526 | (F) Perl tried to compile a regular expression containing the |
1527 | C<(?{ ... })> zero-width assertion at run time, as it would when the | |
1528 | pattern contains interpolated values. Since that is a security risk, it | |
1529 | is not allowed. If you insist, you may still do this by explicitly | |
1530 | building the pattern from an interpolated string at run time and using | |
1531 | that in an eval(). See L<perlre/(?{ code })>. | |
e4d48cc9 | 1532 | |
6df41af2 GS |
1533 | =item %s: Eval-group not allowed, use re 'eval' |
1534 | ||
be771a83 GS |
1535 | (F) A regular expression contained the C<(?{ ... })> zero-width |
1536 | assertion, but that construct is only allowed when the C<use re 'eval'> | |
1537 | pragma is in effect. See L<perlre/(?{ code })>. | |
6df41af2 | 1538 | |
fc36a67e | 1539 | =item Excessively long <> operator |
1540 | ||
1541 | (F) The contents of a <> operator may not exceed the maximum size of a | |
1542 | Perl identifier. If you're just trying to glob a long list of | |
1543 | filenames, try using the glob() operator, or put the filenames into a | |
1544 | variable and glob that. | |
1545 | ||
ed9aa3b7 SG |
1546 | =item exec? I'm not *that* kind of operating system |
1547 | ||
1548 | (F) The C<exec> function is not implemented in MacPerl. See L<perlport>. | |
1549 | ||
f86702cc | 1550 | =item Execution of %s aborted due to compilation errors |
a0d0e21e LW |
1551 | |
1552 | (F) The final summary message when a Perl compilation fails. | |
1553 | ||
1554 | =item Exiting eval via %s | |
1555 | ||
be771a83 GS |
1556 | (W exiting) You are exiting an eval by unconventional means, such as a |
1557 | goto, or a loop control statement. | |
e476b1b5 GS |
1558 | |
1559 | =item Exiting format via %s | |
1560 | ||
9a2ff54b | 1561 | (W exiting) You are exiting a format by unconventional means, such as a |
be771a83 | 1562 | goto, or a loop control statement. |
a0d0e21e | 1563 | |
0a753a76 | 1564 | =item Exiting pseudo-block via %s |
1565 | ||
be771a83 GS |
1566 | (W exiting) You are exiting a rather special block construct (like a |
1567 | sort block or subroutine) by unconventional means, such as a goto, or a | |
1568 | loop control statement. See L<perlfunc/sort>. | |
0a753a76 | 1569 | |
a0d0e21e LW |
1570 | =item Exiting subroutine via %s |
1571 | ||
be771a83 GS |
1572 | (W exiting) You are exiting a subroutine by unconventional means, such |
1573 | as a goto, or a loop control statement. | |
a0d0e21e LW |
1574 | |
1575 | =item Exiting substitution via %s | |
1576 | ||
be771a83 GS |
1577 | (W exiting) You are exiting a substitution by unconventional means, such |
1578 | as a return, a goto, or a loop control statement. | |
a0d0e21e | 1579 | |
7b8d334a GS |
1580 | =item Explicit blessing to '' (assuming package main) |
1581 | ||
be771a83 GS |
1582 | (W misc) You are blessing a reference to a zero length string. This has |
1583 | the effect of blessing the reference into the package main. This is | |
1584 | usually not what you want. Consider providing a default target package, | |
1585 | e.g. bless($ref, $p || 'MyPackage'); | |
7b8d334a | 1586 | |
6df41af2 GS |
1587 | =item %s: Expression syntax |
1588 | ||
be771a83 GS |
1589 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1590 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 GS |
1591 | |
1592 | =item %s failed--call queue aborted | |
1593 | ||
1594 | (F) An untrapped exception was raised while executing a CHECK, INIT, or | |
1595 | END subroutine. Processing of the remainder of the queue of such | |
1596 | routines has been prematurely ended. | |
1597 | ||
7253e4e3 | 1598 | =item False [] range "%s" in regex; marked by <-- HERE in m/%s/ |
73b437c8 | 1599 | |
be771a83 | 1600 | (W regexp) A character class range must start and end at a literal |
7253e4e3 RK |
1601 | character, not another character class like C<\d> or C<[:alpha:]>. The "-" |
1602 | in your false range is interpreted as a literal "-". Consider quoting the | |
1603 | "-", "\-". The <-- HERE shows in the regular expression about where the | |
1604 | problem was discovered. See L<perlre>. | |
73b437c8 | 1605 | |
748a9306 | 1606 | =item Fatal VMS error at %s, line %d |
a0d0e21e | 1607 | |
be771a83 GS |
1608 | (P) An error peculiar to VMS. Something untoward happened in a VMS |
1609 | system service or RTL routine; Perl's exit status should provide more | |
1610 | details. The filename in "at %s" and the line number in "line %d" tell | |
1611 | you which section of the Perl source code is distressed. | |
a0d0e21e LW |
1612 | |
1613 | =item fcntl is not implemented | |
1614 | ||
1615 | (F) Your machine apparently doesn't implement fcntl(). What is this, a | |
1616 | PDP-11 or something? | |
1617 | ||
f337b084 TH |
1618 | =item Field too wide in 'u' format in pack |
1619 | ||
1620 | (W pack) Each line in an uuencoded string start with a length indicator | |
1621 | which can't encode values above 63. So there is no point in asking for | |
1622 | a line length bigger than that. Perl will behave as if you specified | |
1623 | C<u63> as format. | |
1624 | ||
af8c498a | 1625 | =item Filehandle %s opened only for input |
a0d0e21e | 1626 | |
6c8d78fb HS |
1627 | (W io) You tried to write on a read-only filehandle. If you intended |
1628 | it to be a read-write filehandle, you needed to open it with "+<" or | |
1629 | "+>" or "+>>" instead of with "<" or nothing. If you intended only to | |
1630 | write the file, use ">" or ">>". See L<perlfunc/open>. | |
a0d0e21e | 1631 | |
af8c498a | 1632 | =item Filehandle %s opened only for output |
a0d0e21e | 1633 | |
6c8d78fb HS |
1634 | (W io) You tried to read from a filehandle opened only for writing, If |
1635 | you intended it to be a read/write filehandle, you needed to open it | |
be771a83 GS |
1636 | with "+<" or "+>" or "+>>" instead of with "<" or nothing. If you |
1637 | intended only to read from the file, use "<". See L<perlfunc/open>. | |
6c8d78fb HS |
1638 | Another possibility is that you attempted to open filedescriptor 0 |
1639 | (also known as STDIN) for output (maybe you closed STDIN earlier?). | |
97828cef RGS |
1640 | |
1641 | =item Filehandle %s reopened as %s only for input | |
1642 | ||
1643 | (W io) You opened for reading a filehandle that got the same filehandle id | |
d7f8936a | 1644 | as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR |
97828cef RGS |
1645 | previously. |
1646 | ||
1647 | =item Filehandle STDIN reopened as %s only for output | |
1648 | ||
1649 | (W io) You opened for writing a filehandle that got the same filehandle id | |
d7f8936a | 1650 | as STDIN. This occurred because you closed STDIN previously. |
a0d0e21e LW |
1651 | |
1652 | =item Final $ should be \$ or $name | |
1653 | ||
1654 | (F) You must now decide whether the final $ in a string was meant to be | |
be771a83 GS |
1655 | a literal dollar sign, or was meant to introduce a variable name that |
1656 | happens to be missing. So you have to put either the backslash or the | |
1657 | name. | |
a0d0e21e | 1658 | |
56e90b21 GS |
1659 | =item flock() on closed filehandle %s |
1660 | ||
be771a83 | 1661 | (W closed) The filehandle you're attempting to flock() got itself closed |
c289d2f7 | 1662 | some time before now. Check your control flow. flock() operates on |
be771a83 GS |
1663 | filehandles. Are you attempting to call flock() on a dirhandle by the |
1664 | same name? | |
56e90b21 | 1665 | |
6df41af2 GS |
1666 | =item Format not terminated |
1667 | ||
1668 | (F) A format must be terminated by a line with a solitary dot. Perl got | |
1669 | to the end of your file without finding such a line. | |
1670 | ||
a0d0e21e LW |
1671 | =item Format %s redefined |
1672 | ||
e476b1b5 | 1673 | (W redefine) You redefined a format. To suppress this warning, say |
a0d0e21e LW |
1674 | |
1675 | { | |
271595cc | 1676 | no warnings 'redefine'; |
a0d0e21e LW |
1677 | eval "format NAME =..."; |
1678 | } | |
1679 | ||
a0d0e21e LW |
1680 | =item Found = in conditional, should be == |
1681 | ||
e476b1b5 | 1682 | (W syntax) You said |
a0d0e21e LW |
1683 | |
1684 | if ($foo = 123) | |
1685 | ||
1686 | when you meant | |
1687 | ||
1688 | if ($foo == 123) | |
1689 | ||
1690 | (or something like that). | |
1691 | ||
6df41af2 GS |
1692 | =item %s found where operator expected |
1693 | ||
56da5a46 RGS |
1694 | (S syntax) The Perl lexer knows whether to expect a term or an operator. |
1695 | If it sees what it knows to be a term when it was expecting to see an | |
be771a83 GS |
1696 | operator, it gives you this warning. Usually it indicates that an |
1697 | operator or delimiter was omitted, such as a semicolon. | |
6df41af2 | 1698 | |
a0d0e21e LW |
1699 | =item gdbm store returned %d, errno %d, key "%s" |
1700 | ||
1701 | (S) A warning from the GDBM_File extension that a store failed. | |
1702 | ||
1703 | =item gethostent not implemented | |
1704 | ||
1705 | (F) Your C library apparently doesn't implement gethostent(), probably | |
1706 | because if it did, it'd feel morally obligated to return every hostname | |
1707 | on the Internet. | |
1708 | ||
69282e91 | 1709 | =item get%sname() on closed socket %s |
a0d0e21e | 1710 | |
be771a83 GS |
1711 | (W closed) You tried to get a socket or peer socket name on a closed |
1712 | socket. Did you forget to check the return value of your socket() call? | |
a0d0e21e | 1713 | |
748a9306 LW |
1714 | =item getpwnam returned invalid UIC %#o for user "%s" |
1715 | ||
1716 | (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the | |
1717 | C<getpwnam> operator returned an invalid UIC. | |
1718 | ||
6df41af2 GS |
1719 | =item getsockopt() on closed socket %s |
1720 | ||
be771a83 GS |
1721 | (W closed) You tried to get a socket option on a closed socket. Did you |
1722 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
1723 | L<perlfunc/getsockopt>. |
1724 | ||
1725 | =item Global symbol "%s" requires explicit package name | |
1726 | ||
1727 | (F) You've said "use strict vars", which indicates that all variables | |
1728 | must either be lexically scoped (using "my"), declared beforehand using | |
1729 | "our", or explicitly qualified to say which package the global variable | |
1730 | is in (using "::"). | |
1731 | ||
e476b1b5 GS |
1732 | =item glob failed (%s) |
1733 | ||
be771a83 GS |
1734 | (W glob) Something went wrong with the external program(s) used for |
1735 | C<glob> and C<< <*.c> >>. Usually, this means that you supplied a | |
1736 | C<glob> pattern that caused the external program to fail and exit with a | |
1737 | nonzero status. If the message indicates that the abnormal exit | |
1738 | resulted in a coredump, this may also mean that your csh (C shell) is | |
1739 | broken. If so, you should change all of the csh-related variables in | |
1740 | config.sh: If you have tcsh, make the variables refer to it as if it | |
1741 | were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all | |
1742 | empty (except that C<d_csh> should be C<'undef'>) so that Perl will | |
1743 | think csh is missing. In either case, after editing config.sh, run | |
75b44862 | 1744 | C<./Configure -S> and rebuild Perl. |
e476b1b5 | 1745 | |
a0d0e21e LW |
1746 | =item Glob not terminated |
1747 | ||
1748 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
be771a83 GS |
1749 | a term, so it's looking for the corresponding right angle bracket, and |
1750 | not finding it. Chances are you left some needed parentheses out | |
1751 | earlier in the line, and you really meant a "less than". | |
a0d0e21e | 1752 | |
6df41af2 | 1753 | =item Got an error from DosAllocMem |
a0d0e21e | 1754 | |
6df41af2 GS |
1755 | (P) An error peculiar to OS/2. Most probably you're using an obsolete |
1756 | version of Perl, and this should not happen anyway. | |
a0d0e21e LW |
1757 | |
1758 | =item goto must have label | |
1759 | ||
1760 | (F) Unlike with "next" or "last", you're not allowed to goto an | |
1761 | unspecified destination. See L<perlfunc/goto>. | |
1762 | ||
49704364 | 1763 | =item ()-group starts with a count |
18529408 | 1764 | |
49704364 | 1765 | (F) A ()-group started with a count. A count is |
18529408 | 1766 | supposed to follow something: a template character or a ()-group. |
49704364 | 1767 | See L<perlfunc/pack>. |
18529408 | 1768 | |
6df41af2 GS |
1769 | =item %s had compilation errors |
1770 | ||
1771 | (F) The final summary message when a C<perl -c> fails. | |
1772 | ||
a0d0e21e LW |
1773 | =item Had to create %s unexpectedly |
1774 | ||
be771a83 GS |
1775 | (S internal) A routine asked for a symbol from a symbol table that ought |
1776 | to have existed already, but for some reason it didn't, and had to be | |
1777 | created on an emergency basis to prevent a core dump. | |
a0d0e21e LW |
1778 | |
1779 | =item Hash %%s missing the % in argument %d of %s() | |
1780 | ||
be771a83 GS |
1781 | (D deprecated) Really old Perl let you omit the % on hash names in some |
1782 | spots. This is now heavily deprecated. | |
a0d0e21e | 1783 | |
6df41af2 GS |
1784 | =item %s has too many errors |
1785 | ||
1786 | (F) The parser has given up trying to parse the program after 10 errors. | |
1787 | Further error messages would likely be uninformative. | |
1788 | ||
252aa082 JH |
1789 | =item Hexadecimal number > 0xffffffff non-portable |
1790 | ||
e476b1b5 | 1791 | (W portable) The hexadecimal number you specified is larger than 2**32-1 |
9e24b6e2 JH |
1792 | (4294967295) and therefore non-portable between systems. See |
1793 | L<perlport> for more on portability concerns. | |
252aa082 | 1794 | |
8903cb82 | 1795 | =item Identifier too long |
1796 | ||
1797 | (F) Perl limits identifiers (names for variables, functions, etc.) to | |
fc36a67e | 1798 | about 250 characters for simple names, and somewhat more for compound |
be771a83 GS |
1799 | names (like C<$A::B>). You've exceeded Perl's limits. Future versions |
1800 | of Perl are likely to eliminate these arbitrary limitations. | |
8903cb82 | 1801 | |
6df41af2 | 1802 | =item Illegal binary digit %s |
f675dbe5 | 1803 | |
6df41af2 | 1804 | (F) You used a digit other than 0 or 1 in a binary number. |
f675dbe5 | 1805 | |
6df41af2 | 1806 | =item Illegal binary digit %s ignored |
a0d0e21e | 1807 | |
be771a83 GS |
1808 | (W digit) You may have tried to use a digit other than 0 or 1 in a |
1809 | binary number. Interpretation of the binary number stopped before the | |
1810 | offending digit. | |
a0d0e21e | 1811 | |
4fdae800 | 1812 | =item Illegal character %s (carriage return) |
1813 | ||
d5898338 | 1814 | (F) Perl normally treats carriage returns in the program text as it |
be771a83 GS |
1815 | would any other whitespace, which means you should never see this error |
1816 | when Perl was built using standard options. For some reason, your | |
1817 | version of Perl appears to have been built without this support. Talk | |
1818 | to your Perl administrator. | |
4fdae800 | 1819 | |
d37a9538 ST |
1820 | =item Illegal character in prototype for %s : %s |
1821 | ||
420cdfc1 | 1822 | (W syntax) An illegal character was found in a prototype declaration. Legal |
d37a9538 ST |
1823 | characters in prototypes are $, @, %, *, ;, [, ], &, and \. |
1824 | ||
904d85c5 RGS |
1825 | =item Illegal declaration of anonymous subroutine |
1826 | ||
1827 | (F) When using the C<sub> keyword to construct an anonymous subroutine, | |
1828 | you must always specify a block of code. See L<perlsub>. | |
1829 | ||
8e742a20 MHM |
1830 | =item Illegal declaration of subroutine %s |
1831 | ||
1832 | (F) A subroutine was not declared correctly. See L<perlsub>. | |
1833 | ||
a0d0e21e LW |
1834 | =item Illegal division by zero |
1835 | ||
be771a83 GS |
1836 | (F) You tried to divide a number by 0. Either something was wrong in |
1837 | your logic, or you need to put a conditional in to guard against | |
1838 | meaningless input. | |
a0d0e21e | 1839 | |
6df41af2 GS |
1840 | =item Illegal hexadecimal digit %s ignored |
1841 | ||
be771a83 GS |
1842 | (W digit) You may have tried to use a character other than 0 - 9 or |
1843 | A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal | |
1844 | number stopped before the illegal character. | |
6df41af2 | 1845 | |
a0d0e21e LW |
1846 | =item Illegal modulus zero |
1847 | ||
be771a83 GS |
1848 | (F) You tried to divide a number by 0 to get the remainder. Most |
1849 | numbers don't take to this kindly. | |
a0d0e21e | 1850 | |
6df41af2 | 1851 | =item Illegal number of bits in vec |
399388f4 | 1852 | |
6df41af2 GS |
1853 | (F) The number of bits in vec() (the third argument) must be a power of |
1854 | two from 1 to 32 (or 64, if your platform supports that). | |
399388f4 GS |
1855 | |
1856 | =item Illegal octal digit %s | |
a0d0e21e | 1857 | |
d1be9408 | 1858 | (F) You used an 8 or 9 in an octal number. |
a0d0e21e | 1859 | |
399388f4 | 1860 | =item Illegal octal digit %s ignored |
748a9306 | 1861 | |
d1be9408 | 1862 | (W digit) You may have tried to use an 8 or 9 in an octal number. |
75b44862 | 1863 | Interpretation of the octal number stopped before the 8 or 9. |
748a9306 | 1864 | |
6df41af2 | 1865 | =item Illegal switch in PERL5OPT: %s |
6ff81951 | 1866 | |
6df41af2 | 1867 | (X) The PERL5OPT environment variable may only be used to set the |
e4af53b0 | 1868 | following switches: B<-[CDIMUdmtwA]>. |
6ff81951 | 1869 | |
6df41af2 | 1870 | =item Ill-formed CRTL environ value "%s" |
81e118e0 | 1871 | |
75b44862 | 1872 | (W internal) A warning peculiar to VMS. Perl tried to read the CRTL's |
be771a83 GS |
1873 | internal environ array, and encountered an element without the C<=> |
1874 | delimiter used to separate keys from values. The element is ignored. | |
09bef843 | 1875 | |
6df41af2 | 1876 | =item Ill-formed message in prime_env_iter: |%s| |
54310121 | 1877 | |
be771a83 GS |
1878 | (W internal) A warning peculiar to VMS. Perl tried to read a logical |
1879 | name or CLI symbol definition when preparing to iterate over %ENV, and | |
1880 | didn't see the expected delimiter between key and value, so the line was | |
1881 | ignored. | |
54310121 | 1882 | |
8fa7688f SF |
1883 | =item Impossible to activate assertion call |
1884 | ||
1885 | (W assertions) You're calling an assertion function in a block that is | |
1886 | not under the control of the C<assertions> pragma. | |
1887 | ||
6df41af2 | 1888 | =item (in cleanup) %s |
9607fc9c | 1889 | |
be771a83 GS |
1890 | (W misc) This prefix usually indicates that a DESTROY() method raised |
1891 | the indicated exception. Since destructors are usually called by the | |
1892 | system at arbitrary points during execution, and often a vast number of | |
1893 | times, the warning is issued only once for any number of failures that | |
1894 | would otherwise result in the same message being repeated. | |
6df41af2 | 1895 | |
be771a83 GS |
1896 | Failure of user callbacks dispatched using the C<G_KEEPERR> flag could |
1897 | also result in this warning. See L<perlcall/G_KEEPERR>. | |
9607fc9c | 1898 | |
979699d9 JH |
1899 | =item In EBCDIC the v-string components cannot exceed 2147483647 |
1900 | ||
1901 | (F) An error peculiar to EBCDIC. Internally, v-strings are stored as | |
1902 | Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC | |
1903 | encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF). | |
1904 | ||
a0d0e21e LW |
1905 | =item Insecure dependency in %s |
1906 | ||
8b1a09fc | 1907 | (F) You tried to do something that the tainting mechanism didn't like. |
be771a83 GS |
1908 | The tainting mechanism is turned on when you're running setuid or |
1909 | setgid, or when you specify B<-T> to turn it on explicitly. The | |
1910 | tainting mechanism labels all data that's derived directly or indirectly | |
1911 | from the user, who is considered to be unworthy of your trust. If any | |
1912 | such data is used in a "dangerous" operation, you get this error. See | |
1913 | L<perlsec> for more information. | |
a0d0e21e LW |
1914 | |
1915 | =item Insecure directory in %s | |
1916 | ||
be771a83 GS |
1917 | (F) You can't use system(), exec(), or a piped open in a setuid or |
1918 | setgid script if C<$ENV{PATH}> contains a directory that is writable by | |
df98f984 RGS |
1919 | the world. Also, the PATH must not contain any relative directory. |
1920 | See L<perlsec>. | |
a0d0e21e | 1921 | |
62f468fc | 1922 | =item Insecure $ENV{%s} while running %s |
a0d0e21e LW |
1923 | |
1924 | (F) You can't use system(), exec(), or a piped open in a setuid or | |
62f468fc | 1925 | setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>, |
332d5f78 SR |
1926 | C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data |
1927 | supplied (or potentially supplied) by the user. The script must set | |
1928 | the path to a known value, using trustworthy data. See L<perlsec>. | |
a0d0e21e | 1929 | |
a7ae9550 GS |
1930 | =item Integer overflow in %s number |
1931 | ||
75b44862 | 1932 | (W overflow) The hexadecimal, octal or binary number you have specified |
be771a83 GS |
1933 | either as a literal or as an argument to hex() or oct() is too big for |
1934 | your architecture, and has been converted to a floating point number. | |
1935 | On a 32-bit architecture the largest hexadecimal, octal or binary number | |
9e24b6e2 JH |
1936 | representable without overflow is 0xFFFFFFFF, 037777777777, or |
1937 | 0b11111111111111111111111111111111 respectively. Note that Perl | |
1938 | transparently promotes all numbers to a floating point representation | |
1939 | internally--subject to loss of precision errors in subsequent | |
1940 | operations. | |
bbce6d69 | 1941 | |
46314c13 JP |
1942 | =item Integer overflow in version |
1943 | ||
1944 | (F) Some portion of a version initialization is too large for the | |
1945 | size of integers for your architecture. This is not a warning | |
1946 | because there is no rational reason for a version to try and use a | |
1947 | element larger than typically 2**32. This is usually caused by | |
1948 | trying to use some odd mathematical operation as a version, like | |
1949 | 100/9. | |
1950 | ||
7253e4e3 | 1951 | =item Internal disaster in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
1952 | |
1953 | (P) Something went badly wrong in the regular expression parser. | |
7253e4e3 | 1954 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a JF |
1955 | discovered. |
1956 | ||
748a9306 LW |
1957 | =item Internal inconsistency in tracking vforks |
1958 | ||
be771a83 GS |
1959 | (S) A warning peculiar to VMS. Perl keeps track of the number of times |
1960 | you've called C<fork> and C<exec>, to determine whether the current call | |
1961 | to C<exec> should affect the current script or a subprocess (see | |
1962 | L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so | |
1963 | Perl is making a guess and treating this C<exec> as a request to | |
1964 | terminate the Perl script and execute the specified command. | |
748a9306 | 1965 | |
7253e4e3 | 1966 | =item Internal urp in regex; marked by <-- HERE in m/%s/ |
b45f050a | 1967 | |
7253e4e3 RK |
1968 | (P) Something went badly awry in the regular expression parser. The |
1969 | <-- HERE shows in the regular expression about where the problem was | |
1970 | discovered. | |
a0d0e21e | 1971 | |
6df41af2 GS |
1972 | =item %s (...) interpreted as function |
1973 | ||
75b44862 | 1974 | (W syntax) You've run afoul of the rule that says that any list operator |
be771a83 | 1975 | followed by parentheses turns into a function, with all the list |
64977eb6 | 1976 | operators arguments found inside the parentheses. See |
13a2d996 | 1977 | L<perlop/Terms and List Operators (Leftward)>. |
6df41af2 | 1978 | |
09bef843 SB |
1979 | =item Invalid %s attribute: %s |
1980 | ||
1981 | The indicated attribute for a subroutine or variable was not recognized | |
1982 | by Perl or by a user-supplied handler. See L<attributes>. | |
1983 | ||
1984 | =item Invalid %s attributes: %s | |
1985 | ||
be771a83 GS |
1986 | The indicated attributes for a subroutine or variable were not |
1987 | recognized by Perl or by a user-supplied handler. See L<attributes>. | |
09bef843 | 1988 | |
c635e13b | 1989 | =item Invalid conversion in %s: "%s" |
1990 | ||
be771a83 GS |
1991 | (W printf) Perl does not understand the given format conversion. See |
1992 | L<perlfunc/sprintf>. | |
c635e13b | 1993 | |
7253e4e3 | 1994 | =item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
1995 | |
1996 | (F) The range specified in a character class had a minimum character | |
7253e4e3 RK |
1997 | greater than the maximum character. One possibility is that you forgot the |
1998 | C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only | |
1999 | up to C<ff>. The <-- HERE shows in the regular expression about where the | |
2000 | problem was discovered. See L<perlre>. | |
6df41af2 | 2001 | |
d1573ac7 | 2002 | =item Invalid range "%s" in transliteration operator |
c2e66d9e GS |
2003 | |
2004 | (F) The range specified in the tr/// or y/// operator had a minimum | |
2005 | character greater than the maximum character. See L<perlop>. | |
2006 | ||
09bef843 SB |
2007 | =item Invalid separator character %s in attribute list |
2008 | ||
0120eecf | 2009 | (F) Something other than a colon or whitespace was seen between the |
be771a83 GS |
2010 | elements of an attribute list. If the previous attribute had a |
2011 | parenthesised parameter list, perhaps that list was terminated too soon. | |
2012 | See L<attributes>. | |
09bef843 | 2013 | |
b4581f09 JH |
2014 | =item Invalid separator character %s in PerlIO layer specification %s |
2015 | ||
2016 | (W layer) When pushing layers onto the Perl I/O system, something other than a | |
2017 | colon or whitespace was seen between the elements of a layer list. | |
2018 | If the previous attribute had a parenthesised parameter list, perhaps that | |
2019 | list was terminated too soon. | |
2020 | ||
49704364 | 2021 | =item Invalid type '%s' in %s |
96e4d5b1 | 2022 | |
49704364 WL |
2023 | (F) The given character is not a valid pack or unpack type. |
2024 | See L<perlfunc/pack>. | |
2025 | (W) The given character is not a valid pack or unpack type but used to be | |
75b44862 | 2026 | silently ignored. |
96e4d5b1 | 2027 | |
46314c13 JP |
2028 | =item Invalid version format (multiple underscores) |
2029 | ||
2030 | (F) Versions may contain at most a single underscore, which signals | |
2031 | that the version is a beta release. See L<version> for the allowed | |
2032 | version formats. | |
2033 | ||
2034 | =item Invalid version format (underscores before decimal) | |
2035 | ||
2036 | (F) Versions may not contain decimals after the optional underscore. | |
2037 | See L<version> for the allowed version formats. | |
2038 | ||
a0d0e21e LW |
2039 | =item ioctl is not implemented |
2040 | ||
2041 | (F) Your machine apparently doesn't implement ioctl(), which is pretty | |
2042 | strange for a machine that supports C. | |
2043 | ||
c289d2f7 JH |
2044 | =item ioctl() on unopened %s |
2045 | ||
2046 | (W unopened) You tried ioctl() on a filehandle that was never opened. | |
2047 | Check you control flow and number of arguments. | |
2048 | ||
363c40c4 SB |
2049 | =item IO layers (like "%s") unavailable |
2050 | ||
2051 | (F) Your Perl has not been configured to have PerlIO, and therefore | |
2052 | you cannot use IO layers. To have PerlIO Perl must be configured | |
2053 | with 'useperlio'. | |
2054 | ||
80cbd5ad JH |
2055 | =item IO::Socket::atmark not implemented on this architecture |
2056 | ||
2057 | (F) Your machine doesn't implement the sockatmark() functionality, | |
2058 | neither as a system call or an ioctl call (SIOCATMARK). | |
2059 | ||
b4581f09 JH |
2060 | =item $* is no longer supported |
2061 | ||
2062 | (D deprecated) The special variable C<$*>, deprecated in older perls, has | |
2063 | been removed as of 5.9.0 and is no longer supported. You should use the | |
2064 | C<//m> and C<//s> regexp modifiers instead. | |
2065 | ||
8ae1fe26 RGS |
2066 | =item $# is no longer supported |
2067 | ||
2068 | (D deprecated) The special variable C<$#>, deprecated in older perls, has | |
2069 | been removed as of 5.9.3 and is no longer supported. You should use the | |
2070 | printf/sprintf functions instead. | |
2071 | ||
6ad11d81 JH |
2072 | =item `%s' is not a code reference |
2073 | ||
04a80ee0 RGS |
2074 | (W overload) The second (fourth, sixth, ...) argument of overload::constant |
2075 | needs to be a code reference. Either an anonymous subroutine, or a reference | |
6ad11d81 JH |
2076 | to a subroutine. |
2077 | ||
2078 | =item `%s' is not an overloadable type | |
2079 | ||
04a80ee0 RGS |
2080 | (W overload) You tried to overload a constant type the overload package is |
2081 | unaware of. | |
6ad11d81 | 2082 | |
a0d0e21e LW |
2083 | =item junk on end of regexp |
2084 | ||
2085 | (P) The regular expression parser is confused. | |
2086 | ||
2087 | =item Label not found for "last %s" | |
2088 | ||
be771a83 GS |
2089 | (F) You named a loop to break out of, but you're not currently in a loop |
2090 | of that name, not even if you count where you were called from. See | |
2091 | L<perlfunc/last>. | |
a0d0e21e LW |
2092 | |
2093 | =item Label not found for "next %s" | |
2094 | ||
2095 | (F) You named a loop to continue, but you're not currently in a loop of | |
2096 | that name, not even if you count where you were called from. See | |
2097 | L<perlfunc/last>. | |
2098 | ||
2099 | =item Label not found for "redo %s" | |
2100 | ||
2101 | (F) You named a loop to restart, but you're not currently in a loop of | |
2102 | that name, not even if you count where you were called from. See | |
2103 | L<perlfunc/last>. | |
2104 | ||
85ab1d1d | 2105 | =item leaving effective %s failed |
5ff3f7a4 | 2106 | |
85ab1d1d | 2107 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
2108 | effective uids or gids failed. |
2109 | ||
49704364 WL |
2110 | =item length/code after end of string in unpack |
2111 | ||
d7f8936a | 2112 | (F) While unpacking, the string buffer was already used up when an unpack |
49704364 WL |
2113 | length/code combination tried to obtain more data. This results in |
2114 | an undefined value for the length. See L<perlfunc/pack>. | |
2115 | ||
69282e91 | 2116 | =item listen() on closed socket %s |
a0d0e21e | 2117 | |
be771a83 GS |
2118 | (W closed) You tried to do a listen on a closed socket. Did you forget |
2119 | to check the return value of your socket() call? See | |
2120 | L<perlfunc/listen>. | |
a0d0e21e | 2121 | |
49704364 | 2122 | =item Lookbehind longer than %d not implemented in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
2123 | |
2124 | (F) There is currently a limit on the length of string which lookbehind can | |
7253e4e3 RK |
2125 | handle. This restriction may be eased in a future release. The <-- HERE |
2126 | shows in the regular expression about where the problem was discovered. | |
2e50fd82 | 2127 | |
2f7da168 RK |
2128 | =item lstat() on filehandle %s |
2129 | ||
2130 | (W io) You tried to do an lstat on a filehandle. What did you mean | |
2131 | by that? lstat() makes sense only on filenames. (Perl did a fstat() | |
2132 | instead on the filehandle.) | |
2133 | ||
96ebfdd7 RK |
2134 | =item Lvalue subs returning %s not implemented yet |
2135 | ||
2136 | (F) Due to limitations in the current implementation, array and hash | |
2137 | values cannot be returned in subroutines used in lvalue context. See | |
2138 | L<perlsub/"Lvalue subroutines">. | |
2139 | ||
49704364 WL |
2140 | =item Malformed integer in [] in pack |
2141 | ||
2142 | (F) Between the brackets enclosing a numeric repeat count only digits | |
2143 | are permitted. See L<perlfunc/pack>. | |
2144 | ||
2145 | =item Malformed integer in [] in unpack | |
2146 | ||
2147 | (F) Between the brackets enclosing a numeric repeat count only digits | |
2148 | are permitted. See L<perlfunc/pack>. | |
2149 | ||
6df41af2 GS |
2150 | =item Malformed PERLLIB_PREFIX |
2151 | ||
2152 | (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form | |
2153 | ||
2154 | prefix1;prefix2 | |
2155 | ||
2156 | or | |
6df41af2 GS |
2157 | prefix1 prefix2 |
2158 | ||
be771a83 GS |
2159 | with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of |
2160 | a builtin library search path, prefix2 is substituted. The error may | |
2161 | appear if components are not found, or are too long. See | |
fecfaeb8 | 2162 | "PERLLIB_PREFIX" in L<perlos2>. |
6df41af2 | 2163 | |
2f758a16 ST |
2164 | =item Malformed prototype for %s: %s |
2165 | ||
d37a9538 ST |
2166 | (F) You tried to use a function with a malformed prototype. The |
2167 | syntax of function prototypes is given a brief compile-time check for | |
2168 | obvious errors like invalid characters. A more rigorous check is run | |
2169 | when the function is called. | |
2f758a16 | 2170 | |
ba210ebe JH |
2171 | =item Malformed UTF-8 character (%s) |
2172 | ||
987b48f0 RGS |
2173 | (S utf8) (F) Perl detected something that didn't comply with UTF-8 |
2174 | encoding rules. | |
ba210ebe | 2175 | |
901b21bf JH |
2176 | One possible cause is that you read in data that you thought to be in |
2177 | UTF-8 but it wasn't (it was for example legacy 8-bit data). Another | |
2178 | possibility is careless use of utf8::upgrade(). | |
2179 | ||
dea0fc0b JH |
2180 | =item Malformed UTF-16 surrogate |
2181 | ||
2182 | Perl thought it was reading UTF-16 encoded character data but while | |
2183 | doing it Perl met a malformed Unicode surrogate. | |
2184 | ||
f337b084 TH |
2185 | =item Malformed UTF-8 string in pack |
2186 | ||
2187 | (F) You tried to pack something that didn't comply with UTF-8 encoding | |
2188 | rules and perl was unable to guess how to make more progress. | |
2189 | ||
2190 | =item Malformed UTF-8 string in unpack | |
2191 | ||
2192 | (F) You tried to unpack something that didn't comply with UTF-8 encoding | |
2193 | rules and perl was unable to guess how to make more progress. | |
2194 | ||
2195 | =item Malformed UTF-8 string in '%c' format in unpack | |
2196 | ||
2197 | (F) You tried to unpack something that didn't comply with UTF-8 encoding | |
2198 | rules and perl was unable to guess how to make more progress. | |
2199 | ||
49704364 | 2200 | =item %s matches null string many times in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
2201 | |
2202 | (W regexp) The pattern you've specified would be an infinite loop if the | |
7253e4e3 RK |
2203 | regular expression engine didn't specifically check for that. The <-- HERE |
2204 | shows in the regular expression about where the problem was discovered. | |
2205 | See L<perlre>. | |
6df41af2 | 2206 | |
25f58aea PN |
2207 | =item "%s" may clash with future reserved word |
2208 | ||
2209 | (W) This warning may be due to running a perl5 script through a perl4 | |
2210 | interpreter, especially if the word that is being warned about is | |
2211 | "use" or "my". | |
2212 | ||
49704364 | 2213 | =item % may not be used in pack |
6df41af2 GS |
2214 | |
2215 | (F) You can't pack a string by supplying a checksum, because the | |
be771a83 GS |
2216 | checksumming process loses information, and you can't go the other way. |
2217 | See L<perlfunc/unpack>. | |
6df41af2 | 2218 | |
a0d0e21e LW |
2219 | =item Method for operation %s not found in package %s during blessing |
2220 | ||
2221 | (F) An attempt was made to specify an entry in an overloading table that | |
e7ea3e70 | 2222 | doesn't resolve to a valid subroutine. See L<overload>. |
a0d0e21e | 2223 | |
3cdd684c TP |
2224 | =item Method %s not permitted |
2225 | ||
2226 | See Server error. | |
2227 | ||
a0d0e21e LW |
2228 | =item Might be a runaway multi-line %s string starting on line %d |
2229 | ||
2230 | (S) An advisory indicating that the previous error may have been caused | |
2231 | by a missing delimiter on a string or pattern, because it eventually | |
2232 | ended earlier on the current line. | |
2233 | ||
2234 | =item Misplaced _ in number | |
2235 | ||
d4ced10d JH |
2236 | (W syntax) An underscore (underbar) in a numeric constant did not |
2237 | separate two digits. | |
a0d0e21e | 2238 | |
9e81e6a1 RGS |
2239 | =item Missing argument to -%c |
2240 | ||
2241 | (F) The argument to the indicated command line switch must follow | |
2242 | immediately after the switch, without intervening spaces. | |
2243 | ||
4a2d328f | 2244 | =item Missing %sbrace%s on \N{} |
423cee85 | 2245 | |
4a2d328f | 2246 | (F) Wrong syntax of character name literal C<\N{charname}> within |
423cee85 JH |
2247 | double-quotish context. |
2248 | ||
a0d0e21e LW |
2249 | =item Missing comma after first argument to %s function |
2250 | ||
2251 | (F) While certain functions allow you to specify a filehandle or an | |
2252 | "indirect object" before the argument list, this ain't one of them. | |
2253 | ||
06eaf0bc GS |
2254 | =item Missing command in piped open |
2255 | ||
be771a83 GS |
2256 | (W pipe) You used the C<open(FH, "| command")> or |
2257 | C<open(FH, "command |")> construction, but the command was missing or | |
2258 | blank. | |
06eaf0bc | 2259 | |
961ce445 RGS |
2260 | =item Missing control char name in \c |
2261 | ||
2262 | (F) A double-quoted string ended with "\c", without the required control | |
2263 | character name. | |
2264 | ||
6df41af2 GS |
2265 | =item Missing name in "my sub" |
2266 | ||
be771a83 GS |
2267 | (F) The reserved syntax for lexically scoped subroutines requires that |
2268 | they have a name with which they can be found. | |
6df41af2 GS |
2269 | |
2270 | =item Missing $ on loop variable | |
2271 | ||
be771a83 GS |
2272 | (F) Apparently you've been programming in B<csh> too much. Variables |
2273 | are always mentioned with the $ in Perl, unlike in the shells, where it | |
2274 | can vary from one line to the next. | |
6df41af2 | 2275 | |
cc507455 | 2276 | =item (Missing operator before %s?) |
748a9306 | 2277 | |
56da5a46 RGS |
2278 | (S syntax) This is an educated guess made in conjunction with the message |
2279 | "%s found where operator expected". Often the missing operator is a comma. | |
748a9306 | 2280 | |
ab13f0c7 JH |
2281 | =item Missing right brace on %s |
2282 | ||
2283 | (F) Missing right brace in C<\p{...}> or C<\P{...}>. | |
2284 | ||
d98d5fff | 2285 | =item Missing right curly or square bracket |
a0d0e21e | 2286 | |
be771a83 GS |
2287 | (F) The lexer counted more opening curly or square brackets than closing |
2288 | ones. As a general rule, you'll find it's missing near the place you | |
2289 | were last editing. | |
a0d0e21e | 2290 | |
6df41af2 GS |
2291 | =item (Missing semicolon on previous line?) |
2292 | ||
56da5a46 RGS |
2293 | (S syntax) This is an educated guess made in conjunction with the message |
2294 | "%s found where operator expected". Don't automatically put a semicolon on | |
6df41af2 GS |
2295 | the previous line just because you saw this message. |
2296 | ||
a0d0e21e LW |
2297 | =item Modification of a read-only value attempted |
2298 | ||
2299 | (F) You tried, directly or indirectly, to change the value of a | |
5f05dabc | 2300 | constant. You didn't, of course, try "2 = 1", because the compiler |
a0d0e21e LW |
2301 | catches that. But an easy way to do the same thing is: |
2302 | ||
2303 | sub mod { $_[0] = 1 } | |
2304 | mod(2); | |
2305 | ||
2306 | Another way is to assign to a substr() that's off the end of the string. | |
2307 | ||
c5674021 |
2308 | Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR> |
2309 | is aliased to a constant in the look I<LIST>: | |
2310 | ||
2311 | $x = 1; | |
2312 | foreach my $n ($x, 2) { | |
2313 | $n *= 2; # modifies the $x, but fails on attempt to modify the 2 | |
64977eb6 | 2314 | } |
c5674021 | 2315 | |
7a4340ed | 2316 | =item Modification of non-creatable array value attempted, %s |
a0d0e21e LW |
2317 | |
2318 | (F) You tried to make an array value spring into existence, and the | |
2319 | subscript was probably negative, even counting from end of the array | |
2320 | backwards. | |
2321 | ||
7a4340ed | 2322 | =item Modification of non-creatable hash value attempted, %s |
a0d0e21e | 2323 | |
be771a83 GS |
2324 | (P) You tried to make a hash value spring into existence, and it |
2325 | couldn't be created for some peculiar reason. | |
a0d0e21e LW |
2326 | |
2327 | =item Module name must be constant | |
2328 | ||
2329 | (F) Only a bare module name is allowed as the first argument to a "use". | |
2330 | ||
be98fb35 | 2331 | =item Module name required with -%c option |
6df41af2 | 2332 | |
be98fb35 GS |
2333 | (F) The C<-M> or C<-m> options say that Perl should load some module, but |
2334 | you omitted the name of the module. Consult L<perlrun> for full details | |
2335 | about C<-M> and C<-m>. | |
6df41af2 | 2336 | |
ed9aa3b7 SG |
2337 | =item More than one argument to open |
2338 | ||
2339 | (F) The C<open> function has been asked to open multiple files. This | |
2340 | can happen if you are trying to open a pipe to a command that takes a | |
2341 | list of arguments, but have forgotten to specify a piped open mode. | |
2342 | See L<perlfunc/open> for details. | |
2343 | ||
a0d0e21e LW |
2344 | =item msg%s not implemented |
2345 | ||
2346 | (F) You don't have System V message IPC on your system. | |
2347 | ||
2348 | =item Multidimensional syntax %s not supported | |
2349 | ||
75b44862 GS |
2350 | (W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>. |
2351 | They're written like C<$foo[1][2][3]>, as in C. | |
8b1a09fc | 2352 | |
49704364 | 2353 | =item '/' must follow a numeric type in unpack |
6df41af2 | 2354 | |
49704364 WL |
2355 | (F) You had an unpack template that contained a '/', but this did not |
2356 | follow some unpack specification producing a numeric value. | |
2357 | See L<perlfunc/pack>. | |
6df41af2 GS |
2358 | |
2359 | =item "my sub" not yet implemented | |
2360 | ||
be771a83 GS |
2361 | (F) Lexically scoped subroutines are not yet implemented. Don't try |
2362 | that yet. | |
6df41af2 GS |
2363 | |
2364 | =item "my" variable %s can't be in a package | |
2365 | ||
be771a83 GS |
2366 | (F) Lexically scoped variables aren't in a package, so it doesn't make |
2367 | sense to try to declare one with a package qualifier on the front. Use | |
2368 | local() if you want to localize a package variable. | |
09bef843 | 2369 | |
8b1a09fc | 2370 | =item Name "%s::%s" used only once: possible typo |
2371 | ||
e476b1b5 | 2372 | (W once) Typographical errors often show up as unique variable names. |
be771a83 GS |
2373 | If you had a good reason for having a unique name, then just mention it |
2374 | again somehow to suppress the message. The C<our> declaration is | |
77ca0c92 | 2375 | provided for this purpose. |
a0d0e21e | 2376 | |
64b374f4 FD |
2377 | NOTE: This warning detects symbols that have been used only once so $c, @c, |
2378 | %c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered | |
2379 | the same; if a program uses $c only once but also uses any of the others it | |
2380 | will not trigger this warning. | |
2381 | ||
49704364 WL |
2382 | =item Negative '/' count in unpack |
2383 | ||
2384 | (F) The length count obtained from a length/code unpack operation was | |
2385 | negative. See L<perlfunc/pack>. | |
2386 | ||
a0d0e21e LW |
2387 | =item Negative length |
2388 | ||
be771a83 GS |
2389 | (F) You tried to do a read/write/send/recv operation with a buffer |
2390 | length that is less than 0. This is difficult to imagine. | |
a0d0e21e | 2391 | |
ed9aa3b7 SG |
2392 | =item Negative offset to vec in lvalue context |
2393 | ||
2394 | (F) When C<vec> is called in an lvalue context, the second argument must be | |
2395 | greater than or equal to zero. | |
2396 | ||
7253e4e3 | 2397 | =item Nested quantifiers in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 2398 | |
b45f050a | 2399 | (F) You can't quantify a quantifier without intervening parentheses. So |
7253e4e3 | 2400 | things like ** or +* or ?* are illegal. The <-- HERE shows in the regular |
b45f050a | 2401 | expression about where the problem was discovered. |
a0d0e21e | 2402 | |
7253e4e3 | 2403 | Note that the minimal matching quantifiers, C<*?>, C<+?>, and |
be771a83 | 2404 | C<??> appear to be nested quantifiers, but aren't. See L<perlre>. |
a0d0e21e | 2405 | |
6df41af2 | 2406 | =item %s never introduced |
a0d0e21e | 2407 | |
be771a83 GS |
2408 | (S internal) The symbol in question was declared but somehow went out of |
2409 | scope before it could possibly have been used. | |
a0d0e21e LW |
2410 | |
2411 | =item No %s allowed while running setuid | |
2412 | ||
be771a83 GS |
2413 | (F) Certain operations are deemed to be too insecure for a setuid or |
2414 | setgid script to even be allowed to attempt. Generally speaking there | |
2415 | will be another way to do what you want that is, if not secure, at least | |
2416 | securable. See L<perlsec>. | |
a0d0e21e | 2417 | |
a0d0e21e LW |
2418 | =item No comma allowed after %s |
2419 | ||
2420 | (F) A list operator that has a filehandle or "indirect object" is not | |
2421 | allowed to have a comma between that and the following arguments. | |
2422 | Otherwise it'd be just another one of the arguments. | |
2423 | ||
0a753a76 | 2424 | One possible cause for this is that you expected to have imported a |
2425 | constant to your name space with B<use> or B<import> while no such | |
2426 | importing took place, it may for example be that your operating system | |
2427 | does not support that particular constant. Hopefully you did use an | |
2428 | explicit import list for the constants you expect to see, please see | |
2429 | L<perlfunc/use> and L<perlfunc/import>. While an explicit import list | |
2430 | would probably have caught this error earlier it naturally does not | |
2431 | remedy the fact that your operating system still does not support that | |
2432 | constant. Maybe you have a typo in the constants of the symbol import | |
2433 | list of B<use> or B<import> or in the constant name at the line where | |
2434 | this error was triggered? | |
2435 | ||
748a9306 LW |
2436 | =item No command into which to pipe on command line |
2437 | ||
be771a83 GS |
2438 | (F) An error peculiar to VMS. Perl handles its own command line |
2439 | redirection, and found a '|' at the end of the command line, so it | |
2440 | doesn't know where you want to pipe the output from this command. | |
748a9306 | 2441 | |
a0d0e21e LW |
2442 | =item No DB::DB routine defined |
2443 | ||
be771a83 | 2444 | (F) The currently executing code was compiled with the B<-d> switch, but |
ccafdc96 RGS |
2445 | for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::> |
2446 | module) didn't define a routine to be called at the beginning of each | |
2447 | statement. | |
a0d0e21e LW |
2448 | |
2449 | =item No dbm on this machine | |
2450 | ||
2451 | (P) This is counted as an internal error, because every machine should | |
5f05dabc | 2452 | supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>. |
a0d0e21e | 2453 | |
ccafdc96 | 2454 | =item No DB::sub routine defined |
a0d0e21e | 2455 | |
ccafdc96 RGS |
2456 | (F) The currently executing code was compiled with the B<-d> switch, but |
2457 | for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::> | |
2458 | module) didn't define a C<DB::sub> routine to be called at the beginning | |
2459 | of each ordinary subroutine call. | |
a0d0e21e | 2460 | |
96ebfdd7 RK |
2461 | =item No B<-e> allowed in setuid scripts |
2462 | ||
2463 | (F) A setuid script can't be specified by the user. | |
2464 | ||
c47ff5f1 | 2465 | =item No error file after 2> or 2>> on command line |
748a9306 | 2466 | |
be771a83 GS |
2467 | (F) An error peculiar to VMS. Perl handles its own command line |
2468 | redirection, and found a '2>' or a '2>>' on the command line, but can't | |
2469 | find the name of the file to which to write data destined for stderr. | |
748a9306 | 2470 | |
49704364 WL |
2471 | =item No group ending character '%c' found in template |
2472 | ||
2473 | (F) A pack or unpack template has an opening '(' or '[' without its | |
2474 | matching counterpart. See L<perlfunc/pack>. | |
2475 | ||
c47ff5f1 | 2476 | =item No input file after < on command line |
748a9306 | 2477 | |
be771a83 GS |
2478 | (F) An error peculiar to VMS. Perl handles its own command line |
2479 | redirection, and found a '<' on the command line, but can't find the | |
2480 | name of the file from which to read data for stdin. | |
748a9306 | 2481 | |
6df41af2 GS |
2482 | =item No #! line |
2483 | ||
2484 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2485 | even on machines that don't support the #! construct. | |
2486 | ||
2487 | =item "no" not allowed in expression | |
2488 | ||
be771a83 GS |
2489 | (F) The "no" keyword is recognized and executed at compile time, and |
2490 | returns no useful value. See L<perlmod>. | |
6df41af2 | 2491 | |
c47ff5f1 | 2492 | =item No output file after > on command line |
748a9306 | 2493 | |
be771a83 GS |
2494 | (F) An error peculiar to VMS. Perl handles its own command line |
2495 | redirection, and found a lone '>' at the end of the command line, so it | |
2496 | doesn't know where you wanted to redirect stdout. | |
748a9306 | 2497 | |
c47ff5f1 | 2498 | =item No output file after > or >> on command line |
748a9306 | 2499 | |
be771a83 GS |
2500 | (F) An error peculiar to VMS. Perl handles its own command line |
2501 | redirection, and found a '>' or a '>>' on the command line, but can't | |
2502 | find the name of the file to which to write data destined for stdout. | |
748a9306 | 2503 | |
1ec3e8de GS |
2504 | =item No package name allowed for variable %s in "our" |
2505 | ||
be771a83 GS |
2506 | (F) Fully qualified variable names are not allowed in "our" |
2507 | declarations, because that doesn't make much sense under existing | |
2508 | semantics. Such syntax is reserved for future extensions. | |
1ec3e8de | 2509 | |
a0d0e21e LW |
2510 | =item No Perl script found in input |
2511 | ||
2512 | (F) You called C<perl -x>, but no line was found in the file beginning | |
2513 | with #! and containing the word "perl". | |
2514 | ||
2515 | =item No setregid available | |
2516 | ||
2517 | (F) Configure didn't find anything resembling the setregid() call for | |
2518 | your system. | |
2519 | ||
2520 | =item No setreuid available | |
2521 | ||
2522 | (F) Configure didn't find anything resembling the setreuid() call for | |
2523 | your system. | |
2524 | ||
6df41af2 GS |
2525 | =item No %s specified for -%c |
2526 | ||
2527 | (F) The indicated command line switch needs a mandatory argument, but | |
2528 | you haven't specified one. | |
2529 | ||
e75d1f10 RD |
2530 | =item No such class field "%s" in variable %s of type %s |
2531 | ||
2532 | (F) You tried to access a key from a hash through the indicated typed variable | |
2533 | but that key is not allowed by the package of the same type. The indicated | |
2534 | package has restricted the set of allowed keys using the L<fields> pragma. | |
2535 | ||
2c692339 RGS |
2536 | =item No such class %s |
2537 | ||
2538 | (F) You provided a class qualifier in a "my" or "our" declaration, but | |
2539 | this class doesn't exist at this point in your program. | |
2540 | ||
6df41af2 GS |
2541 | =item No such pipe open |
2542 | ||
2543 | (P) An error peculiar to VMS. The internal routine my_pclose() tried to | |
be771a83 GS |
2544 | close a pipe which hadn't been opened. This should have been caught |
2545 | earlier as an attempt to close an unopened filehandle. | |
6df41af2 | 2546 | |
a0d0e21e LW |
2547 | =item No such signal: SIG%s |
2548 | ||
be771a83 GS |
2549 | (W signal) You specified a signal name as a subscript to %SIG that was |
2550 | not recognized. Say C<kill -l> in your shell to see the valid signal | |
2551 | names on your system. | |
a0d0e21e LW |
2552 | |
2553 | =item Not a CODE reference | |
2554 | ||
2555 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2556 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
2557 | use the ref() function to find out what kind of ref it really was. See |
2558 | also L<perlref>. | |
a0d0e21e LW |
2559 | |
2560 | =item Not a format reference | |
2561 | ||
2562 | (F) I'm not sure how you managed to generate a reference to an anonymous | |
2563 | format, but this indicates you did, and that it didn't exist. | |
2564 | ||
2565 | =item Not a GLOB reference | |
2566 | ||
be771a83 GS |
2567 | (F) Perl was trying to evaluate a reference to a "typeglob" (that is, a |
2568 | symbol table entry that looks like C<*foo>), but found a reference to | |
2569 | something else instead. You can use the ref() function to find out what | |
2570 | kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
2571 | |
2572 | =item Not a HASH reference | |
2573 | ||
be771a83 GS |
2574 | (F) Perl was trying to evaluate a reference to a hash value, but found a |
2575 | reference to something else instead. You can use the ref() function to | |
2576 | find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e | 2577 | |
6df41af2 GS |
2578 | =item Not an ARRAY reference |
2579 | ||
be771a83 GS |
2580 | (F) Perl was trying to evaluate a reference to an array value, but found |
2581 | a reference to something else instead. You can use the ref() function | |
2582 | to find out what kind of ref it really was. See L<perlref>. | |
6df41af2 | 2583 | |
a0d0e21e LW |
2584 | =item Not a perl script |
2585 | ||
2586 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2587 | even on machines that don't support the #! construct. The line must | |
2588 | mention perl. | |
2589 | ||
2590 | =item Not a SCALAR reference | |
2591 | ||
be771a83 GS |
2592 | (F) Perl was trying to evaluate a reference to a scalar value, but found |
2593 | a reference to something else instead. You can use the ref() function | |
2594 | to find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
2595 | |
2596 | =item Not a subroutine reference | |
2597 | ||
2598 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2599 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
2600 | use the ref() function to find out what kind of ref it really was. See |
2601 | also L<perlref>. | |
a0d0e21e | 2602 | |
e7ea3e70 | 2603 | =item Not a subroutine reference in overload table |
a0d0e21e LW |
2604 | |
2605 | (F) An attempt was made to specify an entry in an overloading table that | |
8b1a09fc | 2606 | doesn't somehow point to a valid subroutine. See L<overload>. |
a0d0e21e | 2607 | |
a0d0e21e LW |
2608 | =item Not enough arguments for %s |
2609 | ||
2610 | (F) The function requires more arguments than you specified. | |
2611 | ||
6df41af2 GS |
2612 | =item Not enough format arguments |
2613 | ||
be771a83 GS |
2614 | (W syntax) A format specified more picture fields than the next line |
2615 | supplied. See L<perlform>. | |
6df41af2 GS |
2616 | |
2617 | =item %s: not found | |
2618 | ||
be771a83 GS |
2619 | (A) You've accidentally run your script through the Bourne shell instead |
2620 | of Perl. Check the #! line, or manually feed your script into Perl | |
2621 | yourself. | |
6df41af2 GS |
2622 | |
2623 | =item no UTC offset information; assuming local time is UTC | |
a0d0e21e | 2624 | |
6df41af2 GS |
2625 | (S) A warning peculiar to VMS. Perl was unable to find the local |
2626 | timezone offset, so it's assuming that local system time is equivalent | |
be771a83 GS |
2627 | to UTC. If it's not, define the logical name |
2628 | F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which | |
2629 | need to be added to UTC to get local time. | |
a0d0e21e | 2630 | |
4ef2275c GA |
2631 | =item Non-string passed as bitmask |
2632 | ||
2633 | (W misc) A number has been passed as a bitmask argument to select(). | |
2634 | Use the vec() function to construct the file descriptor bitmasks for | |
2635 | select. See L<perlfunc/select> | |
2636 | ||
a0d0e21e LW |
2637 | =item Null filename used |
2638 | ||
be771a83 GS |
2639 | (F) You can't require the null filename, especially because on many |
2640 | machines that means the current directory! See L<perlfunc/require>. | |
a0d0e21e | 2641 | |
6df41af2 GS |
2642 | =item NULL OP IN RUN |
2643 | ||
be771a83 GS |
2644 | (P debugging) Some internal routine called run() with a null opcode |
2645 | pointer. | |
6df41af2 | 2646 | |
55497cff | 2647 | =item Null picture in formline |
2648 | ||
2649 | (F) The first argument to formline must be a valid format picture | |
2650 | specification. It was found to be empty, which probably means you | |
2651 | supplied it an uninitialized value. See L<perlform>. | |
2652 | ||
a0d0e21e LW |
2653 | =item Null realloc |
2654 | ||
2655 | (P) An attempt was made to realloc NULL. | |
2656 | ||
2657 | =item NULL regexp argument | |
2658 | ||
5f05dabc | 2659 | (P) The internal pattern matching routines blew it big time. |
a0d0e21e LW |
2660 | |
2661 | =item NULL regexp parameter | |
2662 | ||
2663 | (P) The internal pattern matching routines are out of their gourd. | |
2664 | ||
fc36a67e | 2665 | =item Number too long |
2666 | ||
be771a83 | 2667 | (F) Perl limits the representation of decimal numbers in programs to |
da75cd15 | 2668 | about 250 characters. You've exceeded that length. Future |
be771a83 GS |
2669 | versions of Perl are likely to eliminate this arbitrary limitation. In |
2670 | the meantime, try using scientific notation (e.g. "1e6" instead of | |
2671 | "1_000_000"). | |
fc36a67e | 2672 | |
6df41af2 GS |
2673 | =item Octal number in vector unsupported |
2674 | ||
be771a83 GS |
2675 | (F) Numbers with a leading C<0> are not currently allowed in vectors. |
2676 | The octal number interpretation of such numbers may be supported in a | |
2677 | future version. | |
6df41af2 | 2678 | |
252aa082 JH |
2679 | =item Octal number > 037777777777 non-portable |
2680 | ||
75b44862 | 2681 | (W portable) The octal number you specified is larger than 2**32-1 |
be771a83 GS |
2682 | (4294967295) and therefore non-portable between systems. See |
2683 | L<perlport> for more on portability concerns. | |
252aa082 JH |
2684 | |
2685 | See also L<perlport> for writing portable code. | |
2686 | ||
6ad11d81 JH |
2687 | =item Odd number of arguments for overload::constant |
2688 | ||
04a80ee0 RGS |
2689 | (W overload) The call to overload::constant contained an odd number of |
2690 | arguments. The arguments should come in pairs. | |
6ad11d81 | 2691 | |
b21befc1 MG |
2692 | =item Odd number of elements in anonymous hash |
2693 | ||
2694 | (W misc) You specified an odd number of elements to initialize a hash, | |
2695 | which is odd, because hashes come in key/value pairs. | |
2696 | ||
1930e939 | 2697 | =item Odd number of elements in hash assignment |
a0d0e21e | 2698 | |
be771a83 GS |
2699 | (W misc) You specified an odd number of elements to initialize a hash, |
2700 | which is odd, because hashes come in key/value pairs. | |
a0d0e21e | 2701 | |
bbce6d69 | 2702 | =item Offset outside string |
2703 | ||
2704 | (F) You tried to do a read/write/send/recv operation with an offset | |
be771a83 GS |
2705 | pointing outside the buffer. This is difficult to imagine. The sole |
2706 | exception to this is that C<sysread()>ing past the buffer will extend | |
2707 | the buffer and zero pad the new area. | |
bbce6d69 | 2708 | |
c289d2f7 | 2709 | =item %s() on unopened %s |
2dd78f96 JH |
2710 | |
2711 | (W unopened) An I/O operation was attempted on a filehandle that was | |
2712 | never initialized. You need to do an open(), a sysopen(), or a socket() | |
2713 | call, or call a constructor from the FileHandle package. | |
2714 | ||
96ebfdd7 RK |
2715 | =item -%s on unopened filehandle %s |
2716 | ||
2717 | (W unopened) You tried to invoke a file test operator on a filehandle | |
2718 | that isn't open. Check your control flow. See also L<perlfunc/-X>. | |
2719 | ||
a0d0e21e LW |
2720 | =item oops: oopsAV |
2721 | ||
e476b1b5 | 2722 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e LW |
2723 | |
2724 | =item oops: oopsHV | |
2725 | ||
e476b1b5 | 2726 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e | 2727 | |
a0288114 | 2728 | =item Operation "%s": no method found, %s |
44a8e56a | 2729 | |
be771a83 GS |
2730 | (F) An attempt was made to perform an overloaded operation for which no |
2731 | handler was defined. While some handlers can be autogenerated in terms | |
2732 | of other handlers, there is no default handler for any operation, unless | |
2733 | C<fallback> overloading key is specified to be true. See L<overload>. | |
44a8e56a | 2734 | |
748a9306 LW |
2735 | =item Operator or semicolon missing before %s |
2736 | ||
be771a83 GS |
2737 | (S ambiguous) You used a variable or subroutine call where the parser |
2738 | was expecting an operator. The parser has assumed you really meant to | |
2739 | use an operator, but this is highly likely to be incorrect. For | |
2740 | example, if you say "*foo *foo" it will be interpreted as if you said | |
2741 | "*foo * 'foo'". | |
748a9306 | 2742 | |
6df41af2 GS |
2743 | =item "our" variable %s redeclared |
2744 | ||
be771a83 GS |
2745 | (W misc) You seem to have already declared the same global once before |
2746 | in the current lexical scope. | |
6df41af2 | 2747 | |
a80b8354 GS |
2748 | =item Out of memory! |
2749 | ||
2750 | (X) The malloc() function returned 0, indicating there was insufficient | |
be771a83 GS |
2751 | remaining memory (or virtual memory) to satisfy the request. Perl has |
2752 | no option but to exit immediately. | |
a80b8354 | 2753 | |
19a52907 JH |
2754 | At least in Unix you may be able to get past this by increasing your |
2755 | process datasize limits: in csh/tcsh use C<limit> and | |
2756 | C<limit datasize n> (where C<n> is the number of kilobytes) to check | |
2757 | the current limits and change them, and in ksh/bash/zsh use C<ulimit -a> | |
2758 | and C<ulimit -d n>, respectively. | |
2759 | ||
6d3b25aa RGS |
2760 | =item Out of memory during %s extend |
2761 | ||
2762 | (X) An attempt was made to extend an array, a list, or a string beyond | |
2763 | the largest possible memory allocation. | |
2764 | ||
6df41af2 | 2765 | =item Out of memory during "large" request for %s |
a0d0e21e | 2766 | |
6df41af2 GS |
2767 | (F) The malloc() function returned 0, indicating there was insufficient |
2768 | remaining memory (or virtual memory) to satisfy the request. However, | |
be771a83 GS |
2769 | the request was judged large enough (compile-time default is 64K), so a |
2770 | possibility to shut down by trapping this error is granted. | |
a0d0e21e | 2771 | |
1b979e0a | 2772 | =item Out of memory during request for %s |
a0d0e21e | 2773 | |
be771a83 GS |
2774 | (X|F) The malloc() function returned 0, indicating there was |
2775 | insufficient remaining memory (or virtual memory) to satisfy the | |
2776 | request. | |
eff9c6e2 CS |
2777 | |
2778 | The request was judged to be small, so the possibility to trap it | |
2779 | depends on the way perl was compiled. By default it is not trappable. | |
be771a83 GS |
2780 | However, if compiled for this, Perl may use the contents of C<$^M> as an |
2781 | emergency pool after die()ing with this message. In this case the error | |
b022d2d2 IZ |
2782 | is trappable I<once>, and the error message will include the line and file |
2783 | where the failed request happened. | |
55497cff | 2784 | |
1b979e0a IZ |
2785 | =item Out of memory during ridiculously large request |
2786 | ||
2787 | (F) You can't allocate more than 2^31+"small amount" bytes. This error | |
be771a83 GS |
2788 | is most likely to be caused by a typo in the Perl program. e.g., |
2789 | C<$arr[time]> instead of C<$arr[$time]>. | |
1b979e0a | 2790 | |
6df41af2 GS |
2791 | =item Out of memory for yacc stack |
2792 | ||
be771a83 GS |
2793 | (F) The yacc parser wanted to grow its stack so it could continue |
2794 | parsing, but realloc() wouldn't give it more memory, virtual or | |
2795 | otherwise. | |
6df41af2 | 2796 | |
28be1210 TH |
2797 | =item '.' outside of string in pack |
2798 | ||
2799 | (F) The argument to a '.' in your template tried to move the working | |
2800 | position to before the start of the packed string being built. | |
2801 | ||
49704364 | 2802 | =item '@' outside of string in unpack |
6df41af2 | 2803 | |
49704364 | 2804 | (F) You had a template that specified an absolute position outside |
6df41af2 GS |
2805 | the string being unpacked. See L<perlfunc/pack>. |
2806 | ||
f337b084 TH |
2807 | =item '@' outside of string with malformed UTF-8 in unpack |
2808 | ||
2809 | (F) You had a template that specified an absolute position outside | |
2810 | the string being unpacked. The string being unpacked was also invalid | |
2811 | UTF-8. See L<perlfunc/pack>. | |
2812 | ||
6df41af2 GS |
2813 | =item %s package attribute may clash with future reserved word: %s |
2814 | ||
be771a83 GS |
2815 | (W reserved) A lowercase attribute name was used that had a |
2816 | package-specific handler. That name might have a meaning to Perl itself | |
2817 | some day, even though it doesn't yet. Perhaps you should use a | |
2818 | mixed-case attribute name, instead. See L<attributes>. | |
6df41af2 | 2819 | |
96ebfdd7 RK |
2820 | =item pack/unpack repeat count overflow |
2821 | ||
2822 | (F) You can't specify a repeat count so large that it overflows your | |
2823 | signed integers. See L<perlfunc/pack>. | |
2824 | ||
a0d0e21e LW |
2825 | =item page overflow |
2826 | ||
be771a83 GS |
2827 | (W io) A single call to write() produced more lines than can fit on a |
2828 | page. See L<perlform>. | |
a0d0e21e | 2829 | |
6df41af2 GS |
2830 | =item panic: %s |
2831 | ||
2832 | (P) An internal error. | |
2833 | ||
c99a1475 NC |
2834 | =item panic: attempt to call %s in %s |
2835 | ||
2836 | (P) One of the file test operators entered a code branch that calls | |
2837 | an ACL related-function, but that function is not available on this | |
2838 | platform. Earlier checks mean that it should not be possible to | |
2839 | enter this branch on this platform. | |
2840 | ||
a0d0e21e LW |
2841 | =item panic: ck_grep |
2842 | ||
2843 | (P) Failed an internal consistency check trying to compile a grep. | |
2844 | ||
2845 | =item panic: ck_split | |
2846 | ||
2847 | (P) Failed an internal consistency check trying to compile a split. | |
2848 | ||
2849 | =item panic: corrupt saved stack index | |
2850 | ||
be771a83 GS |
2851 | (P) The savestack was requested to restore more localized values than |
2852 | there are in the savestack. | |
a0d0e21e | 2853 | |
810b8aa5 GS |
2854 | =item panic: del_backref |
2855 | ||
2856 | (P) Failed an internal consistency check while trying to reset a weak | |
2857 | reference. | |
2858 | ||
7619c85e RG |
2859 | =item panic: Devel::DProf inconsistent subroutine return |
2860 | ||
2861 | (P) Devel::DProf called a subroutine that exited using goto(LABEL), | |
2862 | last(LABEL) or next(LABEL). Leaving that way a subroutine called from | |
2863 | an XSUB will lead very probably to a crash of the interpreter. This is | |
2864 | a bug that will hopefully one day get fixed. | |
2865 | ||
a0d0e21e LW |
2866 | =item panic: die %s |
2867 | ||
2868 | (P) We popped the context stack to an eval context, and then discovered | |
2869 | it wasn't an eval context. | |
2870 | ||
a0d0e21e LW |
2871 | =item panic: do_subst |
2872 | ||
be771a83 GS |
2873 | (P) The internal pp_subst() routine was called with invalid operational |
2874 | data. | |
a0d0e21e | 2875 | |
2269b42e | 2876 | =item panic: do_trans_%s |
a0d0e21e | 2877 | |
2269b42e | 2878 | (P) The internal do_trans routines were called with invalid operational |
be771a83 | 2879 | data. |
a0d0e21e | 2880 | |
c635e13b | 2881 | =item panic: frexp |
2882 | ||
2883 | (P) The library function frexp() failed, making printf("%f") impossible. | |
2884 | ||
a0d0e21e LW |
2885 | =item panic: goto |
2886 | ||
2887 | (P) We popped the context stack to a context with the specified label, | |
2888 | and then discovered it wasn't a context we know how to do a goto in. | |
2889 | ||
2890 | =item panic: INTERPCASEMOD | |
2891 | ||
2892 | (P) The lexer got into a bad state at a case modifier. | |
2893 | ||
2894 | =item panic: INTERPCONCAT | |
2895 | ||
2896 | (P) The lexer got into a bad state parsing a string with brackets. | |
2897 | ||
e446cec8 IZ |
2898 | =item panic: kid popen errno read |
2899 | ||
2900 | (F) forked child returned an incomprehensible message about its errno. | |
2901 | ||
a0d0e21e LW |
2902 | =item panic: last |
2903 | ||
2904 | (P) We popped the context stack to a block context, and then discovered | |
2905 | it wasn't a block context. | |
2906 | ||
2907 | =item panic: leave_scope clearsv | |
2908 | ||
be771a83 GS |
2909 | (P) A writable lexical variable became read-only somehow within the |
2910 | scope. | |
a0d0e21e LW |
2911 | |
2912 | =item panic: leave_scope inconsistency | |
2913 | ||
2914 | (P) The savestack probably got out of sync. At least, there was an | |
2915 | invalid enum on the top of it. | |
2916 | ||
810b8aa5 GS |
2917 | =item panic: magic_killbackrefs |
2918 | ||
2919 | (P) Failed an internal consistency check while trying to reset all weak | |
2920 | references to an object. | |
2921 | ||
6df41af2 GS |
2922 | =item panic: malloc |
2923 | ||
2924 | (P) Something requested a negative number of bytes of malloc. | |
2925 | ||
27d5b266 JH |
2926 | =item panic: memory wrap |
2927 | ||
2928 | (P) Something tried to allocate more memory than possible. | |
2929 | ||
a0d0e21e LW |
2930 | =item panic: null array |
2931 | ||
2932 | (P) One of the internal array routines was passed a null AV pointer. | |
2933 | ||
2934 | =item panic: pad_alloc | |
2935 | ||
2936 | (P) The compiler got confused about which scratch pad it was allocating | |
2937 | and freeing temporaries and lexicals from. | |
2938 | ||
2939 | =item panic: pad_free curpad | |
2940 | ||
2941 | (P) The compiler got confused about which scratch pad it was allocating | |
2942 | and freeing temporaries and lexicals from. | |
2943 | ||
2944 | =item panic: pad_free po | |
2945 | ||
2946 | (P) An invalid scratch pad offset was detected internally. | |
2947 | ||
2948 | =item panic: pad_reset curpad | |
2949 | ||
2950 | (P) The compiler got confused about which scratch pad it was allocating | |
2951 | and freeing temporaries and lexicals from. | |
2952 | ||
2953 | =item panic: pad_sv po | |
2954 | ||
2955 | (P) An invalid scratch pad offset was detected internally. | |
2956 | ||
2957 | =item panic: pad_swipe curpad | |
2958 | ||
2959 | (P) The compiler got confused about which scratch pad it was allocating | |
2960 | and freeing temporaries and lexicals from. | |
2961 | ||
2962 | =item panic: pad_swipe po | |
2963 | ||
2964 | (P) An invalid scratch pad offset was detected internally. | |
2965 | ||
2966 | =item panic: pp_iter | |
2967 | ||
2968 | (P) The foreach iterator got called in a non-loop context frame. | |
2969 | ||
96ebfdd7 RK |
2970 | =item panic: pp_match%s |
2971 | ||
2972 | (P) The internal pp_match() routine was called with invalid operational | |
2973 | data. | |
2974 | ||
2269b42e JH |
2975 | =item panic: pp_split |
2976 | ||
2977 | (P) Something terrible went wrong in setting up for the split. | |
2978 | ||
a0d0e21e LW |
2979 | =item panic: realloc |
2980 | ||
2981 | (P) Something requested a negative number of bytes of realloc. | |
2982 | ||
2983 | =item panic: restartop | |
2984 | ||
2985 | (P) Some internal routine requested a goto (or something like it), and | |
2986 | didn't supply the destination. | |
2987 | ||
2988 | =item panic: return | |
2989 | ||
2990 | (P) We popped the context stack to a subroutine or eval context, and | |
2991 | then discovered it wasn't a subroutine or eval context. | |
2992 | ||
2993 | =item panic: scan_num | |
2994 | ||
2995 | (P) scan_num() got called on something that wasn't a number. | |
2996 | ||
2997 | =item panic: sv_insert | |
2998 | ||
2999 | (P) The sv_insert() routine was told to remove more string than there | |
3000 | was string. | |
3001 | ||
3002 | =item panic: top_env | |
3003 | ||
6224f72b | 3004 | (P) The compiler attempted to do a goto, or something weird like that. |
a0d0e21e | 3005 | |
65bca31a NC |
3006 | =item panic: unimplemented op %s (#%d) called |
3007 | ||
3008 | (P) The compiler is screwed up and attempted to use an op that isn't permitted | |
3009 | at run time. | |
3010 | ||
dea0fc0b JH |
3011 | =item panic: utf16_to_utf8: odd bytelen |
3012 | ||
3013 | (P) Something tried to call utf16_to_utf8 with an odd (as opposed | |
64977eb6 | 3014 | to even) byte length. |
dea0fc0b | 3015 | |
2f7da168 RK |
3016 | =item panic: yylex |
3017 | ||
3018 | (P) The lexer got into a bad state while processing a case modifier. | |
3019 | ||
7b8d334a | 3020 | =item Parentheses missing around "%s" list |
a0d0e21e | 3021 | |
e476b1b5 | 3022 | (W parenthesis) You said something like |
a0d0e21e LW |
3023 | |
3024 | my $foo, $bar = @_; | |
3025 | ||
3026 | when you meant | |
3027 | ||
3028 | my ($foo, $bar) = @_; | |
3029 | ||
54884818 | 3030 | Remember that "my", "our", and "local" bind tighter than comma. |
a0d0e21e | 3031 | |
96ebfdd7 RK |
3032 | =item C<-p> destination: %s |
3033 | ||
3034 | (F) An error occurred during the implicit output invoked by the C<-p> | |
3035 | command-line switch. (This output goes to STDOUT unless you've | |
3036 | redirected it with select().) | |
3037 | ||
3038 | =item (perhaps you forgot to load "%s"?) | |
3039 | ||
3040 | (F) This is an educated guess made in conjunction with the message | |
3041 | "Can't locate object method \"%s\" via package \"%s\"". It often means | |
3042 | that a method requires a package that has not been loaded. | |
3043 | ||
1109a392 MHM |
3044 | =item Perl_my_%s() not available |
3045 | ||
3046 | (F) Your platform has very uncommon byte-order and integer size, | |
3047 | so it was not possible to set up some or all fixed-width byte-order | |
3048 | conversion functions. This is only a problem when you're using the | |
3049 | '<' or '>' modifiers in (un)pack templates. See L<perlfunc/pack>. | |
3050 | ||
6d3b25aa RGS |
3051 | =item Perl %s required--this is only version %s, stopped |
3052 | ||
3053 | (F) The module in question uses features of a version of Perl more | |
3054 | recent than the currently running version. How long has it been since | |
3055 | you upgraded, anyway? See L<perlfunc/require>. | |
3056 | ||
6df41af2 GS |
3057 | =item PERL_SH_DIR too long |
3058 | ||
3059 | (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the | |
fecfaeb8 | 3060 | C<sh>-shell in. See "PERL_SH_DIR" in L<perlos2>. |
6df41af2 | 3061 | |
96ebfdd7 RK |
3062 | =item PERL_SIGNALS illegal: "%s" |
3063 | ||
3064 | See L<perlrun/PERL_SIGNALS> for legal values. | |
3065 | ||
6df41af2 GS |
3066 | =item perl: warning: Setting locale failed. |
3067 | ||
3068 | (S) The whole warning message will look something like: | |
3069 | ||
3070 | perl: warning: Setting locale failed. | |
3071 | perl: warning: Please check that your locale settings: | |
3072 | LC_ALL = "En_US", | |
3073 | LANG = (unset) | |
3074 | are supported and installed on your system. | |
3075 | perl: warning: Falling back to the standard locale ("C"). | |
3076 | ||
3077 | Exactly what were the failed locale settings varies. In the above the | |
3078 | settings were that the LC_ALL was "En_US" and the LANG had no value. | |
0ea6b70f JH |
3079 | This error means that Perl detected that you and/or your operating |
3080 | system supplier and/or system administrator have set up the so-called | |
3081 | locale system but Perl could not use those settings. This was not | |
3082 | dead serious, fortunately: there is a "default locale" called "C" that | |
3083 | Perl can and will use, the script will be run. Before you really fix | |
3084 | the problem, however, you will get the same error message each time | |
3085 | you run Perl. How to really fix the problem can be found in | |
3086 | L<perllocale> section B<LOCALE PROBLEMS>. | |
6df41af2 | 3087 | |
a0d0e21e LW |
3088 | =item Permission denied |
3089 | ||
3090 | (F) The setuid emulator in suidperl decided you were up to no good. | |
3091 | ||
bd3fa61c | 3092 | =item pid %x not a child |
748a9306 | 3093 | |
be771a83 GS |
3094 | (W exec) A warning peculiar to VMS. Waitpid() was asked to wait for a |
3095 | process which isn't a subprocess of the current process. While this is | |
3096 | fine from VMS' perspective, it's probably not what you intended. | |
748a9306 | 3097 | |
49704364 | 3098 | =item 'P' must have an explicit size in unpack |
3bf38418 WL |
3099 | |
3100 | (F) The unpack format P must have an explicit size, not "*". | |
3101 | ||
96ebfdd7 RK |
3102 | =item B<-P> not allowed for setuid/setgid script |
3103 | ||
3104 | (F) The script would have to be opened by the C preprocessor by name, | |
3105 | which provides a race condition that breaks security. | |
3106 | ||
3107 | =item POSIX class [:%s:] unknown in regex; marked by <-- HERE in m/%s/ | |
3108 | ||
3109 | (F) The class in the character class [: :] syntax is unknown. The <-- HERE | |
3110 | shows in the regular expression about where the problem was discovered. | |
3111 | Note that the POSIX character classes do B<not> have the C<is> prefix | |
3112 | the corresponding C interfaces have: in other words, it's C<[[:print:]]>, | |
3113 | not C<isprint>. See L<perlre>. | |
3114 | ||
3115 | =item POSIX getpgrp can't take an argument | |
3116 | ||
3117 | (F) Your system has POSIX getpgrp(), which takes no argument, unlike | |
3118 | the BSD version, which takes a pid. | |
3119 | ||
49704364 | 3120 | =item POSIX syntax [%s] belongs inside character classes in regex; marked by <-- HERE in m/%s/ |
b45f050a | 3121 | |
9a0b3859 | 3122 | (W regexp) The character class constructs [: :], [= =], and [. .] go |
7253e4e3 RK |
3123 | I<inside> character classes, the [] are part of the construct, for example: |
3124 | /[012[:alpha:]345]/. Note that [= =] and [. .] are not currently | |
3125 | implemented; they are simply placeholders for future extensions and will | |
3126 | cause fatal errors. The <-- HERE shows in the regular expression about | |
3127 | where the problem was discovered. See L<perlre>. | |
b45f050a | 3128 | |
49704364 | 3129 | =item POSIX syntax [. .] is reserved for future extensions in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
3130 | |
3131 | (F regexp) Within regular expression character classes ([]) the syntax | |
7253e4e3 RK |
3132 | beginning with "[." and ending with ".]" is reserved for future extensions. |
3133 | If you need to represent those character sequences inside a regular | |
3134 | expression character class, just quote the square brackets with the | |
3135 | backslash: "\[." and ".\]". The <-- HERE shows in the regular expression | |
3136 | about where the problem was discovered. See L<perlre>. | |
b45f050a | 3137 | |
49704364 | 3138 | =item POSIX syntax [= =] is reserved for future extensions in regex; marked by <-- HERE in m/%s/ |
b45f050a | 3139 | |
7253e4e3 RK |
3140 | (F) Within regular expression character classes ([]) the syntax beginning |
3141 | with "[=" and ending with "=]" is reserved for future extensions. If you | |
3142 | need to represent those character sequences inside a regular expression | |
3143 | character class, just quote the square brackets with the backslash: "\[=" | |
3144 | and "=\]". The <-- HERE shows in the regular expression about where the | |
3145 | problem was discovered. See L<perlre>. | |
b45f050a | 3146 | |
bbce6d69 | 3147 | =item Possible attempt to put comments in qw() list |
3148 | ||
e476b1b5 | 3149 | (W qw) qw() lists contain items separated by whitespace; as with literal |
75b44862 | 3150 | strings, comment characters are not ignored, but are instead treated as |
be771a83 GS |
3151 | literal data. (You may have used different delimiters than the |
3152 | parentheses shown here; braces are also frequently used.) | |
bbce6d69 | 3153 | |
774d564b | 3154 | You probably wrote something like this: |
3155 | ||
54310121 | 3156 | @list = qw( |
774d564b | 3157 | a # a comment |
bbce6d69 | 3158 | b # another comment |
774d564b | 3159 | ); |
bbce6d69 | 3160 | |
3161 | when you should have written this: | |
3162 | ||
774d564b | 3163 | @list = qw( |
54310121 | 3164 | a |
3165 | b | |
774d564b | 3166 | ); |
3167 | ||
3168 | If you really want comments, build your list the | |
3169 | old-fashioned way, with quotes and commas: | |
3170 | ||
3171 | @list = ( | |
3172 | 'a', # a comment | |
3173 | 'b', # another comment | |
3174 | ); | |
bbce6d69 | 3175 | |
3176 | =item Possible attempt to separate words with commas | |
3177 | ||
be771a83 GS |
3178 | (W qw) qw() lists contain items separated by whitespace; therefore |
3179 | commas aren't needed to separate the items. (You may have used | |
3180 | different delimiters than the parentheses shown here; braces are also | |
3181 | frequently used.) | |
bbce6d69 | 3182 | |
54310121 | 3183 | You probably wrote something like this: |
bbce6d69 | 3184 | |
774d564b | 3185 | qw! a, b, c !; |
3186 | ||
3187 | which puts literal commas into some of the list items. Write it without | |
3188 | commas if you don't want them to appear in your data: | |
bbce6d69 | 3189 | |
774d564b | 3190 | qw! a b c !; |
bbce6d69 | 3191 | |
a0d0e21e LW |
3192 | =item Possible memory corruption: %s overflowed 3rd argument |
3193 | ||
3194 | (F) An ioctl() or fcntl() returned more than Perl was bargaining for. | |
3195 | Perl guesses a reasonable buffer size, but puts a sentinel byte at the | |
3196 | end of the buffer just in case. This sentinel byte got clobbered, and | |
3197 | Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>. | |
3198 | ||
276b2a0c RGS |
3199 | =item Possible precedence problem on bitwise %c operator |
3200 | ||
3201 | (W precedence) Your program uses a bitwise logical operator in conjunction | |
3202 | with a numeric comparison operator, like this : | |
3203 | ||
3204 | if ($x & $y == 0) { ... } | |
3205 | ||
3206 | This expression is actually equivalent to C<$x & ($y == 0)>, due to the | |
3207 | higher precedence of C<==>. This is probably not what you want. (If you | |
96a925ab YST |
3208 | really meant to write this, disable the warning, or, better, put the |
3209 | parentheses explicitly and write C<$x & ($y == 0)>). | |
276b2a0c | 3210 | |
18623440 PS |
3211 | =item Possible unintended interpolation of %s in string |
3212 | ||
3213 | (W ambiguous) You said something like `@foo' in a double-quoted string | |
32b0a12e AMS |
3214 | but there was no array C<@foo> in scope at the time. If you wanted a |
3215 | literal @foo, then write it as \@foo; otherwise find out what happened | |
3216 | to the array you apparently lost track of. | |
18623440 | 3217 | |
8cd79558 GS |
3218 | =item pragma "attrs" is deprecated, use "sub NAME : ATTRS" instead |
3219 | ||
a1063b2d | 3220 | (D deprecated) You have written something like this: |
8cd79558 GS |
3221 | |
3222 | sub doit | |
3223 | { | |
3224 | use attrs qw(locked); | |
3225 | } | |
3226 | ||
3227 | You should use the new declaration syntax instead. | |
3228 | ||
3229 | sub doit : locked | |
3230 | { | |
3231 | ... | |
3232 | ||
3233 | The C<use attrs> pragma is now obsolete, and is only provided for | |
3234 | backward-compatibility. See L<perlsub/"Subroutine Attributes">. | |
3235 | ||
a0d0e21e LW |
3236 | =item Precedence problem: open %s should be open(%s) |
3237 | ||
e476b1b5 | 3238 | (S precedence) The old irregular construct |
cb1a09d0 | 3239 | |
a0d0e21e LW |
3240 | open FOO || die; |
3241 | ||
3242 | is now misinterpreted as | |
3243 | ||
3244 | open(FOO || die); | |
3245 | ||
be771a83 GS |
3246 | because of the strict regularization of Perl 5's grammar into unary and |
3247 | list operators. (The old open was a little of both.) You must put | |
3248 | parentheses around the filehandle, or use the new "or" operator instead | |
3249 | of "||". | |
a0d0e21e | 3250 | |
3cdd684c TP |
3251 | =item Premature end of script headers |
3252 | ||
3253 | See Server error. | |
3254 | ||
6df41af2 GS |
3255 | =item printf() on closed filehandle %s |
3256 | ||
be771a83 | 3257 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 3258 | before now. Check your control flow. |
6df41af2 | 3259 | |
9a7dcd9c | 3260 | =item print() on closed filehandle %s |
a0d0e21e | 3261 | |
be771a83 | 3262 | (W closed) The filehandle you're printing on got itself closed sometime |
c289d2f7 | 3263 | before now. Check your control flow. |
a0d0e21e | 3264 | |
6df41af2 | 3265 | =item Process terminated by SIG%s |
a0d0e21e | 3266 | |
6df41af2 GS |
3267 | (W) This is a standard message issued by OS/2 applications, while *nix |
3268 | applications die in silence. It is considered a feature of the OS/2 | |
3269 | port. One can easily disable this by appropriate sighandlers, see | |
3270 | L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT" | |
fecfaeb8 | 3271 | in L<perlos2>. |
a0d0e21e | 3272 | |
3fe9a6f1 | 3273 | =item Prototype mismatch: %s vs %s |
4633a7c4 | 3274 | |
9a0b3859 | 3275 | (S prototype) The subroutine being declared or defined had previously been |
be771a83 | 3276 | declared or defined with a different function prototype. |
4633a7c4 | 3277 | |
ed9aa3b7 SG |
3278 | =item Prototype not terminated |
3279 | ||
2a6fd447 | 3280 | (F) You've omitted the closing parenthesis in a function prototype |
ed9aa3b7 SG |
3281 | definition. |
3282 | ||
96ebfdd7 RK |
3283 | =item Quantifier follows nothing in regex; marked by <-- HERE in m/%s/ |
3284 | ||
3285 | (F) You started a regular expression with a quantifier. Backslash it if you | |
3286 | meant it literally. The <-- HERE shows in the regular expression about | |
3287 | where the problem was discovered. See L<perlre>. | |
3288 | ||
49704364 | 3289 | =item Quantifier in {,} bigger than %d in regex; marked by <-- HERE in m/%s/ |
9baa0206 | 3290 | |
b45f050a | 3291 | (F) There is currently a limit to the size of the min and max values of the |
7253e4e3 | 3292 | {min,max} construct. The <-- HERE shows in the regular expression about where |
b45f050a | 3293 | the problem was discovered. See L<perlre>. |
9baa0206 | 3294 | |
49704364 | 3295 | =item Quantifier unexpected on zero-length expression; marked by <-- HERE in m/%s/ |
9baa0206 | 3296 | |
b45f050a JF |
3297 | (W regexp) You applied a regular expression quantifier in a place where |
3298 | it makes no sense, such as on a zero-width assertion. Try putting the | |
3299 | quantifier inside the assertion instead. For example, the way to match | |
3300 | "abc" provided that it is followed by three repetitions of "xyz" is | |
3301 | C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>. | |
9baa0206 | 3302 | |
7253e4e3 RK |
3303 | The <-- HERE shows in the regular expression about where the problem was |
3304 | discovered. | |
3305 | ||
89ea2908 GA |
3306 | =item Range iterator outside integer range |
3307 | ||
3308 | (F) One (or both) of the numeric arguments to the range operator ".." | |
3309 | are outside the range which can be represented by integers internally. | |
be771a83 GS |
3310 | One possible workaround is to force Perl to use magical string increment |
3311 | by prepending "0" to your numbers. | |
89ea2908 | 3312 | |
96ebfdd7 RK |
3313 | =item readline() on closed filehandle %s |
3314 | ||
3315 | (W closed) The filehandle you're reading from got itself closed sometime | |
3316 | before now. Check your control flow. | |
3317 | ||
b5fe5ca2 SR |
3318 | =item read() on closed filehandle %s |
3319 | ||
3320 | (W closed) You tried to read from a closed filehandle. | |
3321 | ||
3322 | =item read() on unopened filehandle %s | |
3323 | ||
3324 | (W unopened) You tried to read from a filehandle that was never opened. | |
3325 | ||
6df41af2 GS |
3326 | =item Reallocation too large: %lx |
3327 | ||
3328 | (F) You can't allocate more than 64K on an MS-DOS machine. | |
3329 | ||
4ad56ec9 IZ |
3330 | =item realloc() of freed memory ignored |
3331 | ||
be771a83 GS |
3332 | (S malloc) An internal routine called realloc() on something that had |
3333 | already been freed. | |
4ad56ec9 | 3334 | |
a0d0e21e LW |
3335 | =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch |
3336 | ||
be771a83 GS |
3337 | (F debugging) You can't use the B<-D> option unless the code to produce |
3338 | the desired output is compiled into Perl, which entails some overhead, | |
a0d0e21e LW |
3339 | which is why it's currently left out of your copy. |
3340 | ||
3e0ccd42 | 3341 | =item Recursive inheritance detected in package '%s' |
a0d0e21e LW |
3342 | |
3343 | (F) More than 100 levels of inheritance were used. Probably indicates | |
3344 | an unintended loop in your inheritance hierarchy. | |
3345 | ||
7a4340ed | 3346 | =item Recursive inheritance detected while looking for method %s |
3e0ccd42 | 3347 | |
be771a83 GS |
3348 | (F) More than 100 levels of inheritance were encountered while invoking |
3349 | a method. Probably indicates an unintended loop in your inheritance | |
3350 | hierarchy. | |
3e0ccd42 | 3351 | |
1930e939 TP |
3352 | =item Reference found where even-sized list expected |
3353 | ||
be771a83 GS |
3354 | (W misc) You gave a single reference where Perl was expecting a list |
3355 | with an even number of elements (for assignment to a hash). This usually | |
3356 | means that you used the anon hash constructor when you meant to use | |
3357 | parens. In any case, a hash requires key/value B<pairs>. | |
7b8d334a GS |
3358 | |
3359 | %hash = { one => 1, two => 2, }; # WRONG | |
3360 | %hash = [ qw/ an anon array / ]; # WRONG | |
3361 | %hash = ( one => 1, two => 2, ); # right | |
3362 | %hash = qw( one 1 two 2 ); # also fine | |
3363 | ||
810b8aa5 GS |
3364 | =item Reference is already weak |
3365 | ||
e476b1b5 | 3366 | (W misc) You have attempted to weaken a reference that is already weak. |
810b8aa5 GS |
3367 | Doing so has no effect. |
3368 | ||
a0d0e21e LW |
3369 | =item Reference miscount in sv_replace() |
3370 | ||
be771a83 GS |
3371 | (W internal) The internal sv_replace() function was handed a new SV with |
3372 | a reference count of other than 1. | |
a0d0e21e | 3373 | |
49704364 | 3374 | =item Reference to nonexistent group in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
3375 | |
3376 | (F) You used something like C<\7> in your regular expression, but there are | |
3377 | not at least seven sets of capturing parentheses in the expression. If you | |
3378 | wanted to have the character with value 7 inserted into the regular expression, | |
3379 | prepend a zero to make the number at least two digits: C<\07> | |
9baa0206 | 3380 | |
7253e4e3 | 3381 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a | 3382 | discovered. |
9baa0206 | 3383 | |
a0d0e21e LW |
3384 | =item regexp memory corruption |
3385 | ||
3386 | (P) The regular expression engine got confused by what the regular | |
3387 | expression compiler gave it. | |
3388 | ||
b45f050a | 3389 | =item Regexp out of space |
a0d0e21e | 3390 | |
be771a83 GS |
3391 | (P) A "can't happen" error, because safemalloc() should have caught it |
3392 | earlier. | |
a0d0e21e | 3393 | |
a1b95068 WL |
3394 | =item Repeated format line will never terminate (~~ and @# incompatible) |
3395 | ||
d7f8936a | 3396 | (F) Your format contains the ~~ repeat-until-blank sequence and a |
a1b95068 WL |
3397 | numeric field that will never go blank so that the repetition never |
3398 | terminates. You might use ^# instead. See L<perlform>. | |
3399 | ||
a0d0e21e LW |
3400 | =item Reversed %s= operator |
3401 | ||
be771a83 GS |
3402 | (W syntax) You wrote your assignment operator backwards. The = must |
3403 | always comes last, to avoid ambiguity with subsequent unary operators. | |
a0d0e21e LW |
3404 | |
3405 | =item Runaway format | |
3406 | ||
3407 | (F) Your format contained the ~~ repeat-until-blank sequence, but it | |
3408 | produced 200 lines at once, and the 200th line looked exactly like the | |
3409 | 199th line. Apparently you didn't arrange for the arguments to exhaust | |
3410 | themselves, either by using ^ instead of @ (for scalar variables), or by | |
3411 | shifting or popping (for array variables). See L<perlform>. | |
3412 | ||
96ebfdd7 RK |
3413 | =item Scalars leaked: %d |
3414 | ||
3415 | (P) Something went wrong in Perl's internal bookkeeping of scalars: | |
3416 | not all scalar variables were deallocated by the time Perl exited. | |
3417 | What this usually indicates is a memory leak, which is of course bad, | |
3418 | especially if the Perl program is intended to be long-running. | |
3419 | ||
a0d0e21e LW |
3420 | =item Scalar value @%s[%s] better written as $%s[%s] |
3421 | ||
be771a83 GS |
3422 | (W syntax) You've used an array slice (indicated by @) to select a |
3423 | single element of an array. Generally it's better to ask for a scalar | |
3424 | value (indicated by $). The difference is that C<$foo[&bar]> always | |
3425 | behaves like a scalar, both when assigning to it and when evaluating its | |
3426 | argument, while C<@foo[&bar]> behaves like a list when you assign to it, | |
3427 | and provides a list context to its subscript, which can do weird things | |
3428 | if you're expecting only one subscript. | |
a0d0e21e | 3429 | |
748a9306 | 3430 | On the other hand, if you were actually hoping to treat the array |
5f05dabc | 3431 | element as a list, you need to look into how references work, because |
748a9306 LW |
3432 | Perl will not magically convert between scalars and lists for you. See |
3433 | L<perlref>. | |
3434 | ||
a6006777 | 3435 | =item Scalar value @%s{%s} better written as $%s{%s} |
3436 | ||
75b44862 | 3437 | (W syntax) You've used a hash slice (indicated by @) to select a single |
be771a83 GS |
3438 | element of a hash. Generally it's better to ask for a scalar value |
3439 | (indicated by $). The difference is that C<$foo{&bar}> always behaves | |
3440 | like a scalar, both when assigning to it and when evaluating its | |
3441 | argument, while C<@foo{&bar}> behaves like a list when you assign to it, | |
3442 | and provides a list context to its subscript, which can do weird things | |
3443 | if you're expecting only one subscript. | |
3444 | ||
3445 | On the other hand, if you were actually hoping to treat the hash element | |
3446 | as a list, you need to look into how references work, because Perl will | |
3447 | not magically convert between scalars and lists for you. See | |
a6006777 | 3448 | L<perlref>. |
3449 | ||
a0d0e21e LW |
3450 | =item Script is not setuid/setgid in suidperl |
3451 | ||
54310121 | 3452 | (F) Oddly, the suidperl program was invoked on a script without a setuid |
3453 | or setgid bit set. This doesn't make much sense. | |
a0d0e21e LW |
3454 | |
3455 | =item Search pattern not terminated | |
3456 | ||
3457 | (F) The lexer couldn't find the final delimiter of a // or m{} | |
3458 | construct. Remember that bracketing delimiters count nesting level. | |
fb73857a | 3459 | Missing the leading C<$> from a variable C<$m> may cause this error. |
a0d0e21e | 3460 | |
0cb1bcd7 | 3461 | Note that since Perl 5.9.0 a // can also be the I<defined-or> |
5d9c98cd JH |
3462 | construct, not just the empty search pattern. Therefore code written |
3463 | in Perl 5.9.0 or later that uses the // as the I<defined-or> can be | |
3464 | misparsed by pre-5.9.0 Perls as a non-terminated search pattern. | |
3465 | ||
25c09cbf SF |
3466 | =item Search pattern not terminated or ternary operator parsed as search pattern |
3467 | ||
3468 | (F) The lexer couldn't find the final delimiter of a C<?PATTERN?> | |
3469 | construct. | |
3470 | ||
3471 | The question mark is also used as part of the ternary operator (as in | |
3472 | C<foo ? 0 : 1>) leading to some ambiguous constructions being wrongly | |
3473 | parsed. One way to disambiguate the parsing is to put parentheses around | |
3474 | the conditional expression, i.e. C<(foo) ? 0 : 1>. | |
3475 | ||
9ddeeac9 | 3476 | =item %sseek() on unopened filehandle |
a0d0e21e | 3477 | |
be771a83 GS |
3478 | (W unopened) You tried to use the seek() or sysseek() function on a |
3479 | filehandle that was either never opened or has since been closed. | |
a0d0e21e LW |
3480 | |
3481 | =item select not implemented | |
3482 | ||
3483 | (F) This machine doesn't implement the select() system call. | |
3484 | ||
ae21d580 | 3485 | =item Self-ties of arrays and hashes are not supported |
68a4a7e4 | 3486 | |
ae21d580 JH |
3487 | (F) Self-ties are of arrays and hashes are not supported in |
3488 | the current implementation. | |
68a4a7e4 | 3489 | |
6df41af2 | 3490 | =item Semicolon seems to be missing |
a0d0e21e | 3491 | |
75b44862 GS |
3492 | (W semicolon) A nearby syntax error was probably caused by a missing |
3493 | semicolon, or possibly some other missing operator, such as a comma. | |
a0d0e21e LW |
3494 | |
3495 | =item semi-panic: attempt to dup freed string | |
3496 | ||
be771a83 GS |
3497 | (S internal) The internal newSVsv() routine was called to duplicate a |
3498 | scalar that had previously been marked as free. | |
a0d0e21e | 3499 | |
6df41af2 | 3500 | =item sem%s not implemented |
a0d0e21e | 3501 | |
6df41af2 | 3502 | (F) You don't have System V semaphore IPC on your system. |
a0d0e21e | 3503 | |
69282e91 | 3504 | =item send() on closed socket %s |
a0d0e21e | 3505 | |
be771a83 | 3506 | (W closed) The socket you're sending to got itself closed sometime |
c289d2f7 | 3507 | before now. Check your control flow. |
a0d0e21e | 3508 | |
7253e4e3 | 3509 | =item Sequence (? incomplete in regex; marked by <-- HERE in m/%s/ |
7b8d334a | 3510 | |
7253e4e3 | 3511 | (F) A regular expression ended with an incomplete extension (?. The <-- HERE |
b45f050a | 3512 | shows in the regular expression about where the problem was discovered. See |
be771a83 | 3513 | L<perlre>. |
1b1626e4 | 3514 | |
49704364 | 3515 | =item Sequence (?%s...) not implemented in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 3516 | |
b45f050a | 3517 | (F) A proposed regular expression extension has the character reserved but |
7253e4e3 | 3518 | has not yet been written. The <-- HERE shows in the regular expression about |
b45f050a JF |
3519 | where the problem was discovered. See L<perlre>. |
3520 | ||
49704364 | 3521 | =item Sequence (?%s...) not recognized in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 3522 | |
7253e4e3 RK |
3523 | (F) You used a regular expression extension that doesn't make sense. The |
3524 | <-- HERE shows in the regular expression about where the problem was | |
3525 | discovered. See L<perlre>. | |
a0d0e21e | 3526 | |
49704364 | 3527 | =item Sequence (?#... not terminated in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
3528 | |
3529 | (F) A regular expression comment must be terminated by a closing | |
7253e4e3 RK |
3530 | parenthesis. Embedded parentheses aren't allowed. The <-- HERE shows in |
3531 | the regular expression about where the problem was discovered. See | |
3532 | L<perlre>. | |
6df41af2 | 3533 | |
96ebfdd7 RK |
3534 | =item Sequence (?{...}) not terminated or not {}-balanced in regex; marked by <-- HERE in m/%s/ |
3535 | ||
3536 | (F) If the contents of a (?{...}) clause contains braces, they must balance | |
3537 | for Perl to properly detect the end of the clause. The <-- HERE shows in | |
3538 | the regular expression about where the problem was discovered. See | |
3539 | L<perlre>. | |
3540 | ||
6df41af2 GS |
3541 | =item 500 Server error |
3542 | ||
3543 | See Server error. | |
3544 | ||
a5f75d66 AD |
3545 | =item Server error |
3546 | ||
3cdd684c | 3547 | This is the error message generally seen in a browser window when trying |
be771a83 GS |
3548 | to run a CGI program (including SSI) over the web. The actual error text |
3549 | varies widely from server to server. The most frequently-seen variants | |
3550 | are "500 Server error", "Method (something) not permitted", "Document | |
3551 | contains no data", "Premature end of script headers", and "Did not | |
3552 | produce a valid header". | |
9607fc9c | 3553 | |
3554 | B<This is a CGI error, not a Perl error>. | |
3555 | ||
be771a83 GS |
3556 | You need to make sure your script is executable, is accessible by the |
3557 | user CGI is running the script under (which is probably not the user | |
3558 | account you tested it under), does not rely on any environment variables | |
3559 | (like PATH) from the user it isn't running under, and isn't in a | |
3560 | location where the CGI server can't find it, basically, more or less. | |
3561 | Please see the following for more information: | |
9607fc9c | 3562 | |
06a5f41f JH |
3563 | http://www.perl.org/CGI_MetaFAQ.html |
3564 | http://www.htmlhelp.org/faq/cgifaq.html | |
3565 | http://www.w3.org/Security/Faq/ | |
a5f75d66 | 3566 | |
be94a901 GS |
3567 | You should also look at L<perlfaq9>. |
3568 | ||
a0d0e21e LW |
3569 | =item setegid() not implemented |
3570 | ||
be771a83 GS |
3571 | (F) You tried to assign to C<$)>, and your operating system doesn't |
3572 | support the setegid() system call (or equivalent), or at least Configure | |
3573 | didn't think so. | |
a0d0e21e LW |
3574 | |
3575 | =item seteuid() not implemented | |
3576 | ||
be771a83 GS |
3577 | (F) You tried to assign to C<< $> >>, and your operating system doesn't |
3578 | support the seteuid() system call (or equivalent), or at least Configure | |
3579 | didn't think so. | |
a0d0e21e | 3580 | |
81777298 GS |
3581 | =item setpgrp can't take arguments |
3582 | ||
be771a83 GS |
3583 | (F) Your system has the setpgrp() from BSD 4.2, which takes no |
3584 | arguments, unlike POSIX setpgid(), which takes a process ID and process | |
3585 | group ID. | |
81777298 | 3586 | |
a0d0e21e LW |
3587 | =item setrgid() not implemented |
3588 | ||
be771a83 GS |
3589 | (F) You tried to assign to C<$(>, and your operating system doesn't |
3590 | support the setrgid() system call (or equivalent), or at least Configure | |
3591 | didn't think so. | |
a0d0e21e LW |
3592 | |
3593 | =item setruid() not implemented | |
3594 | ||
be771a83 GS |
3595 | (F) You tried to assign to C<$<>, and your operating system doesn't |
3596 | support the setruid() system call (or equivalent), or at least Configure | |
3597 | didn't think so. | |
a0d0e21e | 3598 | |
6df41af2 GS |
3599 | =item setsockopt() on closed socket %s |
3600 | ||
be771a83 GS |
3601 | (W closed) You tried to set a socket option on a closed socket. Did you |
3602 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
3603 | L<perlfunc/setsockopt>. |
3604 | ||
a0d0e21e LW |
3605 | =item Setuid/gid script is writable by world |
3606 | ||
be771a83 GS |
3607 | (F) The setuid emulator won't run a script that is writable by the |
3608 | world, because the world might have written on it already. | |
a0d0e21e | 3609 | |
d504a7a1 RGS |
3610 | =item Setuid script not plain file |
3611 | ||
3612 | (F) The setuid emulator won't run a script that isn't read from a file, | |
3613 | but from a socket, a pipe or another device. | |
3614 | ||
a0d0e21e LW |
3615 | =item shm%s not implemented |
3616 | ||
3617 | (F) You don't have System V shared memory IPC on your system. | |
3618 | ||
984200d0 YST |
3619 | =item !=~ should be !~ |
3620 | ||
3621 | (W syntax) The non-matching operator is !~, not !=~. !=~ will be | |
3622 | interpreted as the != (numeric not equal) and ~ (1's complement) | |
3623 | operators: probably not what you intended. | |
3624 | ||
6df41af2 GS |
3625 | =item <> should be quotes |
3626 | ||
3627 | (F) You wrote C<< require <file> >> when you should have written | |
3628 | C<require 'file'>. | |
3629 | ||
3630 | =item /%s/ should probably be written as "%s" | |
3631 | ||
3632 | (W syntax) You have used a pattern where Perl expected to find a string, | |
be771a83 GS |
3633 | as in the first argument to C<join>. Perl will treat the true or false |
3634 | result of matching the pattern against $_ as the string, which is | |
3635 | probably not what you had in mind. | |
6df41af2 | 3636 | |
69282e91 | 3637 | =item shutdown() on closed socket %s |
a0d0e21e | 3638 | |
75b44862 GS |
3639 | (W closed) You tried to do a shutdown on a closed socket. Seems a bit |
3640 | superfluous. | |
a0d0e21e | 3641 | |
f86702cc | 3642 | =item SIG%s handler "%s" not defined |
a0d0e21e | 3643 | |
be771a83 GS |
3644 | (W signal) The signal handler named in %SIG doesn't, in fact, exist. |
3645 | Perhaps you put it into the wrong package? | |
a0d0e21e LW |
3646 | |
3647 | =item sort is now a reserved word | |
3648 | ||
3649 | (F) An ancient error message that almost nobody ever runs into anymore. | |
3650 | But before sort was a keyword, people sometimes used it as a filehandle. | |
3651 | ||
3652 | =item Sort subroutine didn't return a numeric value | |
3653 | ||
3654 | (F) A sort comparison routine must return a number. You probably blew | |
c47ff5f1 | 3655 | it by not using C<< <=> >> or C<cmp>, or by not using them correctly. |
a0d0e21e LW |
3656 | See L<perlfunc/sort>. |
3657 | ||
3658 | =item Sort subroutine didn't return single value | |
3659 | ||
3660 | (F) A sort comparison subroutine may not return a list value with more | |
3661 | or less than one element. See L<perlfunc/sort>. | |
3662 | ||
8cbc2e3b JH |
3663 | =item splice() offset past end of array |
3664 | ||
3665 | (W misc) You attempted to specify an offset that was past the end of | |
3666 | the array passed to splice(). Splicing will instead commence at the end | |
3667 | of the array, rather than past it. If this isn't what you want, try | |
3668 | explicitly pre-extending the array by assigning $#array = $offset. See | |
3669 | L<perlfunc/splice>. | |
3670 | ||
a0d0e21e LW |
3671 | =item Split loop |
3672 | ||
be771a83 GS |
3673 | (P) The split was looping infinitely. (Obviously, a split shouldn't |
3674 | iterate more times than there are characters of input, which is what | |
3675 | happened.) See L<perlfunc/split>. | |
a0d0e21e | 3676 | |
a0d0e21e LW |
3677 | =item Statement unlikely to be reached |
3678 | ||
be771a83 GS |
3679 | (W exec) You did an exec() with some statement after it other than a |
3680 | die(). This is almost always an error, because exec() never returns | |
3681 | unless there was a failure. You probably wanted to use system() | |
3682 | instead, which does return. To suppress this warning, put the exec() in | |
3683 | a block by itself. | |
a0d0e21e | 3684 | |
9ddeeac9 | 3685 | =item stat() on unopened filehandle %s |
6df41af2 | 3686 | |
355b1299 JH |
3687 | (W unopened) You tried to use the stat() function on a filehandle that |
3688 | was either never opened or has since been closed. | |
6df41af2 | 3689 | |
f46d83d8 | 3690 | =item Stub found while resolving method "%s" overloading "%s" |
e7ea3e70 | 3691 | |
be771a83 GS |
3692 | (P) Overloading resolution over @ISA tree may be broken by importation |
3693 | stubs. Stubs should never be implicitly created, but explicit calls to | |
3694 | C<can> may break this. | |
e7ea3e70 | 3695 | |
a0d0e21e LW |
3696 | =item Subroutine %s redefined |
3697 | ||
e476b1b5 | 3698 | (W redefine) You redefined a subroutine. To suppress this warning, say |
a0d0e21e LW |
3699 | |
3700 | { | |
271595cc | 3701 | no warnings 'redefine'; |
a0d0e21e LW |
3702 | eval "sub name { ... }"; |
3703 | } | |
3704 | ||
3705 | =item Substitution loop | |
3706 | ||
be771a83 GS |
3707 | (P) The substitution was looping infinitely. (Obviously, a substitution |
3708 | shouldn't iterate more times than there are characters of input, which | |
3709 | is what happened.) See the discussion of substitution in | |
5f05dabc | 3710 | L<perlop/"Quote and Quote-like Operators">. |
a0d0e21e LW |
3711 | |
3712 | =item Substitution pattern not terminated | |
3713 | ||
d1be9408 | 3714 | (F) The lexer couldn't find the interior delimiter of an s/// or s{}{} |
a0d0e21e | 3715 | construct. Remember that bracketing delimiters count nesting level. |
fb73857a | 3716 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
3717 | |
3718 | =item Substitution replacement not terminated | |
3719 | ||
d1be9408 | 3720 | (F) The lexer couldn't find the final delimiter of an s/// or s{}{} |
a0d0e21e | 3721 | construct. Remember that bracketing delimiters count nesting level. |
fb73857a | 3722 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
3723 | |
3724 | =item substr outside of string | |
3725 | ||
be771a83 GS |
3726 | (W substr),(F) You tried to reference a substr() that pointed outside of |
3727 | a string. That is, the absolute value of the offset was larger than the | |
3728 | length of the string. See L<perlfunc/substr>. This warning is fatal if | |
3729 | substr is used in an lvalue context (as the left hand side of an | |
3730 | assignment or as a subroutine argument for example). | |
a0d0e21e | 3731 | |
f86702cc | 3732 | =item suidperl is no longer needed since %s |
a0d0e21e | 3733 | |
be771a83 GS |
3734 | (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but |
3735 | a version of the setuid emulator somehow got run anyway. | |
a0d0e21e | 3736 | |
bf1320bf RGS |
3737 | =item sv_upgrade from type %d down to type %d |
3738 | ||
3739 | (P) Perl tried to force the upgrade an SV to a type which was actually | |
3740 | inferior to its current type. | |
3741 | ||
49704364 | 3742 | =item Switch (?(condition)... contains too many branches in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
3743 | |
3744 | (F) A (?(condition)if-clause|else-clause) construct can have at most two | |
3745 | branches (the if-clause and the else-clause). If you want one or both to | |
3746 | contain alternation, such as using C<this|that|other>, enclose it in | |
3747 | clustering parentheses: | |
3748 | ||
3749 | (?(condition)(?:this|that|other)|else-clause) | |
3750 | ||
7253e4e3 | 3751 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a JF |
3752 | discovered. See L<perlre>. |
3753 | ||
49704364 | 3754 | =item Switch condition not recognized in regex; marked by <-- HERE in m/%s/ |
b45f050a JF |
3755 | |
3756 | (F) If the argument to the (?(...)if-clause|else-clause) construct is a | |
7253e4e3 | 3757 | number, it can be only a number. The <-- HERE shows in the regular expression |
b45f050a JF |
3758 | about where the problem was discovered. See L<perlre>. |
3759 | ||
85ab1d1d JH |
3760 | =item switching effective %s is not implemented |
3761 | ||
be771a83 GS |
3762 | (F) While under the C<use filetest> pragma, we cannot switch the real |
3763 | and effective uids or gids. | |
85ab1d1d | 3764 | |
2f7da168 RK |
3765 | =item %s syntax |
3766 | ||
3767 | (F) The final summary message when a C<perl -c> succeeds. | |
3768 | ||
a0d0e21e LW |
3769 | =item syntax error |
3770 | ||
3771 | (F) Probably means you had a syntax error. Common reasons include: | |
3772 | ||
3773 | A keyword is misspelled. | |
3774 | A semicolon is missing. | |
3775 | A comma is missing. | |
3776 | An opening or closing parenthesis is missing. | |
3777 | An opening or closing brace is missing. | |
3778 | A closing quote is missing. | |
3779 | ||
3780 | Often there will be another error message associated with the syntax | |
3781 | error giving more information. (Sometimes it helps to turn on B<-w>.) | |
3782 | The error message itself often tells you where it was in the line when | |
3783 | it decided to give up. Sometimes the actual error is several tokens | |
5f05dabc | 3784 | before this, because Perl is good at understanding random input. |
a0d0e21e LW |
3785 | Occasionally the line number may be misleading, and once in a blue moon |
3786 | the only way to figure out what's triggering the error is to call | |
3787 | C<perl -c> repeatedly, chopping away half the program each time to see | |
be771a83 GS |
3788 | if the error went away. Sort of the cybernetic version of S<20 |
3789 | questions>. | |
a0d0e21e | 3790 | |
cb1a09d0 AD |
3791 | =item syntax error at line %d: `%s' unexpected |
3792 | ||
be771a83 GS |
3793 | (A) You've accidentally run your script through the Bourne shell instead |
3794 | of Perl. Check the #! line, or manually feed your script into Perl | |
3795 | yourself. | |
cb1a09d0 | 3796 | |
25f58aea PN |
3797 | =item syntax error in file %s at line %d, next 2 tokens "%s" |
3798 | ||
3799 | (F) This error is likely to occur if you run a perl5 script through | |
3800 | a perl4 interpreter, especially if the next 2 tokens are "use strict" | |
3801 | or "my $var" or "our $var". | |
3802 | ||
b5fe5ca2 SR |
3803 | =item sysread() on closed filehandle %s |
3804 | ||
3805 | (W closed) You tried to read from a closed filehandle. | |
3806 | ||
3807 | =item sysread() on unopened filehandle %s | |
3808 | ||
3809 | (W unopened) You tried to read from a filehandle that was never opened. | |
3810 | ||
6087ac44 | 3811 | =item System V %s is not implemented on this machine |
a0d0e21e | 3812 | |
6087ac44 JH |
3813 | (F) You tried to do something with a function beginning with "sem", |
3814 | "shm", or "msg" but that System V IPC is not implemented in your | |
3815 | machine. In some machines the functionality can exist but be | |
3816 | unconfigured. Consult your system support. | |
a0d0e21e | 3817 | |
69282e91 | 3818 | =item syswrite() on closed filehandle %s |
a0d0e21e | 3819 | |
be771a83 | 3820 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 3821 | before now. Check your control flow. |
a0d0e21e | 3822 | |
96ebfdd7 RK |
3823 | =item C<-T> and C<-B> not implemented on filehandles |
3824 | ||
3825 | (F) Perl can't peek at the stdio buffer of filehandles when it doesn't | |
3826 | know about your kind of stdio. You'll have to use a filename instead. | |
3827 | ||
fc36a67e | 3828 | =item Target of goto is too deeply nested |
3829 | ||
be771a83 GS |
3830 | (F) You tried to use C<goto> to reach a label that was too deeply nested |
3831 | for Perl to reach. Perl is doing you a favor by refusing. | |
fc36a67e | 3832 | |
9ddeeac9 | 3833 | =item tell() on unopened filehandle |
a0d0e21e | 3834 | |
be771a83 GS |
3835 | (W unopened) You tried to use the tell() function on a filehandle that |
3836 | was either never opened or has since been closed. | |
a0d0e21e | 3837 | |
a0d0e21e LW |
3838 | =item That use of $[ is unsupported |
3839 | ||
be771a83 GS |
3840 | (F) Assignment to C<$[> is now strictly circumscribed, and interpreted |
3841 | as a compiler directive. You may say only one of | |
a0d0e21e LW |
3842 | |
3843 | $[ = 0; | |
3844 | $[ = 1; | |
3845 | ... | |
3846 | local $[ = 0; | |
3847 | local $[ = 1; | |
3848 | ... | |
3849 | ||
be771a83 GS |
3850 | This is to prevent the problem of one module changing the array base out |
3851 | from under another module inadvertently. See L<perlvar/$[>. | |
a0d0e21e | 3852 | |
f86702cc | 3853 | =item The crypt() function is unimplemented due to excessive paranoia |
a0d0e21e LW |
3854 | |
3855 | (F) Configure couldn't find the crypt() function on your machine, | |
3856 | probably because your vendor didn't supply it, probably because they | |
8b1a09fc | 3857 | think the U.S. Government thinks it's a secret, or at least that they |
a0d0e21e LW |
3858 | will continue to pretend that it is. And if you quote me on that, I |
3859 | will deny it. | |
3860 | ||
6df41af2 GS |
3861 | =item The %s function is unimplemented |
3862 | ||
3863 | The function indicated isn't implemented on this architecture, according | |
3864 | to the probings of Configure. | |
3865 | ||
5e1c7ca2 | 3866 | =item The stat preceding %s wasn't an lstat |
a0d0e21e | 3867 | |
be771a83 GS |
3868 | (F) It makes no sense to test the current stat buffer for symbolic |
3869 | linkhood if the last stat that wrote to the stat buffer already went | |
3870 | past the symlink to get to the real file. Use an actual filename | |
3871 | instead. | |
a0d0e21e | 3872 | |
371fce9b DM |
3873 | =item The 'unique' attribute may only be applied to 'our' variables |
3874 | ||
3875 | (F) Currently this attribute is not supported on C<my> or C<sub> | |
3876 | declarations. See L<perlfunc/our>. | |
3877 | ||
437784d6 | 3878 | =item This Perl can't reset CRTL environ elements (%s) |
f675dbe5 CB |
3879 | |
3880 | =item This Perl can't set CRTL environ elements (%s=%s) | |
3881 | ||
75b44862 | 3882 | (W internal) Warnings peculiar to VMS. You tried to change or delete an |
be771a83 GS |
3883 | element of the CRTL's internal environ array, but your copy of Perl |
3884 | wasn't built with a CRTL that contained the setenv() function. You'll | |
3885 | need to rebuild Perl with a CRTL that does, or redefine | |
3886 | F<PERL_ENV_TABLES> (see L<perlvms>) so that the environ array isn't the | |
3887 | target of the change to | |
f675dbe5 CB |
3888 | %ENV which produced the warning. |
3889 | ||
6b3c7930 JH |
3890 | =item thread failed to start: %s |
3891 | ||
4447dfc1 | 3892 | (W threads)(S) The entry point function of threads->create() failed for some reason. |
6b3c7930 | 3893 | |
a0d0e21e LW |
3894 | =item times not implemented |
3895 | ||
be771a83 GS |
3896 | (F) Your version of the C library apparently doesn't do times(). I |
3897 | suspect you're not running on Unix. | |
a0d0e21e | 3898 | |
6d3b25aa RGS |
3899 | =item "-T" is on the #! line, it must also be used on the command line |
3900 | ||
3901 | (X) The #! line (or local equivalent) in a Perl script contains the | |
3902 | B<-T> option, but Perl was not invoked with B<-T> in its command line. | |
3903 | This is an error because, by the time Perl discovers a B<-T> in a | |
3904 | script, it's too late to properly taint everything from the environment. | |
3905 | So Perl gives up. | |
3906 | ||
3907 | If the Perl script is being executed as a command using the #! | |
3908 | mechanism (or its local equivalent), this error can usually be fixed by | |
3909 | editing the #! line so that the B<-T> option is a part of Perl's first | |
3910 | argument: e.g. change C<perl -n -T> to C<perl -T -n>. | |
3911 | ||
3912 | If the Perl script is being executed as C<perl scriptname>, then the | |
3913 | B<-T> option must appear on the command line: C<perl -T scriptname>. | |
3914 | ||
3a2263fe RGS |
3915 | =item To%s: illegal mapping '%s' |
3916 | ||
3917 | (F) You tried to define a customized To-mapping for lc(), lcfirst, | |
3918 | uc(), or ucfirst() (or their string-inlined versions), but you | |
3919 | specified an illegal mapping. | |
3920 | See L<perlunicode/"User-Defined Character Properties">. | |
3921 | ||
49704364 WL |
3922 | =item Too deeply nested ()-groups |
3923 | ||
3924 | (F) Your template contains ()-groups with a ridiculously deep nesting level. | |
3925 | ||
a0d0e21e LW |
3926 | =item Too few args to syscall |
3927 | ||
3928 | (F) There has to be at least one argument to syscall() to specify the | |
3929 | system call to call, silly dilly. | |
3930 | ||
96ebfdd7 RK |
3931 | =item Too late for "-%s" option |
3932 | ||
3933 | (X) The #! line (or local equivalent) in a Perl script contains the | |
3ffe3ee4 | 3934 | B<-M>, B<-m> or B<-C> option. This is an error because those options |
96ebfdd7 RK |
3935 | are not intended for use inside scripts. Use the C<use> pragma instead. |
3936 | ||
ddda08b7 GS |
3937 | =item Too late to run %s block |
3938 | ||
3939 | (W void) A CHECK or INIT block is being defined during run time proper, | |
3940 | when the opportunity to run them has already passed. Perhaps you are | |
be771a83 GS |
3941 | loading a file with C<require> or C<do> when you should be using C<use> |
3942 | instead. Or perhaps you should put the C<require> or C<do> inside a | |
3943 | BEGIN block. | |
ddda08b7 | 3944 | |
a0d0e21e LW |
3945 | =item Too many args to syscall |
3946 | ||
5f05dabc | 3947 | (F) Perl supports a maximum of only 14 args to syscall(). |
a0d0e21e LW |
3948 | |
3949 | =item Too many arguments for %s | |
3950 | ||
3951 | (F) The function requires fewer arguments than you specified. | |
3952 | ||
6df41af2 GS |
3953 | =item Too many )'s |
3954 | ||
49704364 WL |
3955 | (A) You've accidentally run your script through B<csh> instead of Perl. |
3956 | Check the #! line, or manually feed your script into Perl yourself. | |
3957 | ||
8c40cb74 NC |
3958 | =item Too many ('s |
3959 | ||
be771a83 GS |
3960 | (A) You've accidentally run your script through B<csh> instead of Perl. |
3961 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 3962 | |
7253e4e3 | 3963 | =item Trailing \ in regex m/%s/ |
a0d0e21e | 3964 | |
be771a83 GS |
3965 | (F) The regular expression ends with an unbackslashed backslash. |
3966 | Backslash it. See L<perlre>. | |
a0d0e21e | 3967 | |
2c268ad5 | 3968 | =item Transliteration pattern not terminated |
a0d0e21e LW |
3969 | |
3970 | (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] | |
fb73857a | 3971 | or y/// or y[][] construct. Missing the leading C<$> from variables |
3972 | C<$tr> or C<$y> may cause this error. | |
a0d0e21e | 3973 | |
2c268ad5 | 3974 | =item Transliteration replacement not terminated |
a0d0e21e | 3975 | |
6a36df5d YST |
3976 | (F) The lexer couldn't find the final delimiter of a tr///, tr[][], |
3977 | y/// or y[][] construct. | |
a0d0e21e | 3978 | |
96ebfdd7 RK |
3979 | =item '%s' trapped by operation mask |
3980 | ||
3981 | (F) You tried to use an operator from a Safe compartment in which it's | |
3982 | disallowed. See L<Safe>. | |
3983 | ||
a0d0e21e LW |
3984 | =item truncate not implemented |
3985 | ||
3986 | (F) Your machine doesn't implement a file truncation mechanism that | |
3987 | Configure knows about. | |
3988 | ||
3989 | =item Type of arg %d to %s must be %s (not %s) | |
3990 | ||
3991 | (F) This function requires the argument in that position to be of a | |
8b1a09fc | 3992 | certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be |
3993 | %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the | |
a0d0e21e LW |
3994 | {EXPR} forms as an explicit dereference. See L<perlref>. |
3995 | ||
eec2d3df GS |
3996 | =item umask not implemented |
3997 | ||
be771a83 GS |
3998 | (F) Your machine doesn't implement the umask function and you tried to |
3999 | use it to restrict permissions for yourself (EXPR & 0700). | |
a0d0e21e | 4000 | |
4633a7c4 LW |
4001 | =item Unable to create sub named "%s" |
4002 | ||
4003 | (F) You attempted to create or access a subroutine with an illegal name. | |
4004 | ||
a0d0e21e LW |
4005 | =item Unbalanced context: %d more PUSHes than POPs |
4006 | ||
be771a83 GS |
4007 | (W internal) The exit code detected an internal inconsistency in how |
4008 | many execution contexts were entered and left. | |
a0d0e21e LW |
4009 | |
4010 | =item Unbalanced saves: %d more saves than restores | |
4011 | ||
be771a83 GS |
4012 | (W internal) The exit code detected an internal inconsistency in how |
4013 | many values were temporarily localized. | |
a0d0e21e LW |
4014 | |
4015 | =item Unbalanced scopes: %d more ENTERs than LEAVEs | |
4016 | ||
be771a83 GS |
4017 | (W internal) The exit code detected an internal inconsistency in how |
4018 | many blocks were entered and left. | |
a0d0e21e LW |
4019 | |
4020 | =item Unbalanced tmps: %d more allocs than frees | |
4021 | ||
be771a83 GS |
4022 | (W internal) The exit code detected an internal inconsistency in how |
4023 | many mortal scalars were allocated and freed. | |
a0d0e21e LW |
4024 | |
4025 | =item Undefined format "%s" called | |
4026 | ||
4027 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
4028 | another package? See L<perlform>. | |
4029 | ||
4030 | =item Undefined sort subroutine "%s" called | |
4031 | ||
be771a83 GS |
4032 | (F) The sort comparison routine specified doesn't seem to exist. |
4033 | Perhaps it's in a different package? See L<perlfunc/sort>. | |
a0d0e21e LW |
4034 | |
4035 | =item Undefined subroutine &%s called | |
4036 | ||
be771a83 GS |
4037 | (F) The subroutine indicated hasn't been defined, or if it was, it has |
4038 | since been undefined. | |
a0d0e21e LW |
4039 | |
4040 | =item Undefined subroutine called | |
4041 | ||
4042 | (F) The anonymous subroutine you're trying to call hasn't been defined, | |
4043 | or if it was, it has since been undefined. | |
4044 | ||
4045 | =item Undefined subroutine in sort | |
4046 | ||
be771a83 GS |
4047 | (F) The sort comparison routine specified is declared but doesn't seem |
4048 | to have been defined yet. See L<perlfunc/sort>. | |
a0d0e21e | 4049 | |
4633a7c4 LW |
4050 | =item Undefined top format "%s" called |
4051 | ||
4052 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
4053 | another package? See L<perlform>. | |
4054 | ||
20408e3c GS |
4055 | =item Undefined value assigned to typeglob |
4056 | ||
be771a83 GS |
4057 | (W misc) An undefined value was assigned to a typeglob, a la |
4058 | C<*foo = undef>. This does nothing. It's possible that you really mean | |
4059 | C<undef *foo>. | |
20408e3c | 4060 | |
6df41af2 GS |
4061 | =item %s: Undefined variable |
4062 | ||
be771a83 GS |
4063 | (A) You've accidentally run your script through B<csh> instead of Perl. |
4064 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 4065 | |
a0d0e21e LW |
4066 | =item unexec of %s into %s failed! |
4067 | ||
4068 | (F) The unexec() routine failed for some reason. See your local FSF | |
4069 | representative, who probably put it there in the first place. | |
4070 | ||
3d401ffb JH |
4071 | =item Unicode character %s is illegal |
4072 | ||
507b9800 JH |
4073 | (W utf8) Certain Unicode characters have been designated off-limits by |
4074 | the Unicode standard and should not be generated. If you really know | |
4075 | what you are doing you can turn off this warning by C<no warnings 'utf8';>. | |
b45f050a | 4076 | |
a0d0e21e LW |
4077 | =item Unknown BYTEORDER |
4078 | ||
be771a83 GS |
4079 | (F) There are no byte-swapping functions for a machine with this byte |
4080 | order. | |
a0d0e21e | 4081 | |
6170680b IZ |
4082 | =item Unknown open() mode '%s' |
4083 | ||
437784d6 | 4084 | (F) The second argument of 3-argument open() is not among the list |
c47ff5f1 | 4085 | of valid modes: C<< < >>, C<< > >>, C<<< >> >>>, C<< +< >>, |
488dad83 | 4086 | C<< +> >>, C<<< +>> >>>, C<-|>, C<|->, C<< <& >>, C<< >& >>. |
6170680b | 4087 | |
b4581f09 JH |
4088 | =item Unknown PerlIO layer "%s" |
4089 | ||
4090 | (W layer) An attempt was made to push an unknown layer onto the Perl I/O | |
4091 | system. (Layers take care of transforming data between external and | |
4092 | internal representations.) Note that some layers, such as C<mmap>, | |
4093 | are not supported in all environments. If your program didn't | |
4094 | explicitly request the failing operation, it may be the result of the | |
4095 | value of the environment variable PERLIO. | |
4096 | ||
f675dbe5 CB |
4097 | =item Unknown process %x sent message to prime_env_iter: %s |
4098 | ||
4099 | (P) An error peculiar to VMS. Perl was reading values for %ENV before | |
4100 | iterating over it, and someone else stuck a message in the stream of | |
4101 | data Perl expected. Someone's very confused, or perhaps trying to | |
4102 | subvert Perl's population of %ENV for nefarious purposes. | |
a05d7ebb | 4103 | |
2f7da168 RK |
4104 | =item Unknown "re" subpragma '%s' (known ones are: %s) |
4105 | ||
4106 | You tried to use an unknown subpragma of the "re" pragma. | |
4107 | ||
96ebfdd7 RK |
4108 | =item Unknown switch condition (?(%.2s in regex; marked by <-- HERE in m/%s/ |
4109 | ||
4110 | (F) The condition part of a (?(condition)if-clause|else-clause) construct | |
4111 | is not known. The condition may be lookahead or lookbehind (the condition | |
4112 | is true if the lookahead or lookbehind is true), a (?{...}) construct (the | |
4113 | condition is true if the code evaluates to a true value), or a number (the | |
4114 | condition is true if the set of capturing parentheses named by the number | |
4115 | matched). | |
4116 | ||
4117 | The <-- HERE shows in the regular expression about where the problem was | |
4118 | discovered. See L<perlre>. | |
4119 | ||
a05d7ebb JH |
4120 | =item Unknown Unicode option letter '%c' |
4121 | ||
4122 | You specified an unknown Unicode option. See L<perlrun> documentation | |
4123 | of the C<-C> switch for the list of known options. | |
4124 | ||
4125 | =item Unknown Unicode option value %x | |
4126 | ||
4127 | You specified an unknown Unicode option. See L<perlrun> documentation | |
4128 | of the C<-C> switch for the list of known options. | |
f675dbe5 | 4129 | |
3d1a39c8 RGS |
4130 | =item Unknown warnings category '%s' |
4131 | ||
4132 | (F) An error issued by the C<warnings> pragma. You specified a warnings | |
4133 | category that is unknown to perl at this point. | |
4134 | ||
4135 | Note that if you want to enable a warnings category registered by a module | |
4136 | (e.g. C<use warnings 'File::Find'>), you must have imported this module | |
4137 | first. | |
4138 | ||
7253e4e3 | 4139 | =item unmatched [ in regex; marked by <-- HERE in m/%s/ |
6df41af2 | 4140 | |
380a0633 | 4141 | (F) The brackets around a character class must match. If you wish to |
be771a83 | 4142 | include a closing bracket in a character class, backslash it or put it |
7253e4e3 RK |
4143 | first. The <-- HERE shows in the regular expression about where the problem |
4144 | was discovered. See L<perlre>. | |
6df41af2 | 4145 | |
7253e4e3 | 4146 | =item unmatched ( in regex; marked by <-- HERE in m/%s/ |
a0d0e21e LW |
4147 | |
4148 | (F) Unbackslashed parentheses must always be balanced in regular | |
7253e4e3 RK |
4149 | expressions. If you're a vi user, the % key is valuable for finding the |
4150 | matching parenthesis. The <-- HERE shows in the regular expression about | |
4151 | where the problem was discovered. See L<perlre>. | |
a0d0e21e | 4152 | |
d98d5fff | 4153 | =item Unmatched right %s bracket |
a0d0e21e | 4154 | |
be771a83 GS |
4155 | (F) The lexer counted more closing curly or square brackets than opening |
4156 | ones, so you're probably missing a matching opening bracket. As a | |
4157 | general rule, you'll find the missing one (so to speak) near the place | |
4158 | you were last editing. | |
a0d0e21e | 4159 | |
a0d0e21e LW |
4160 | =item Unquoted string "%s" may clash with future reserved word |
4161 | ||
be771a83 GS |
4162 | (W reserved) You used a bareword that might someday be claimed as a |
4163 | reserved word. It's best to put such a word in quotes, or capitalize it | |
4164 | somehow, or insert an underbar into it. You might also declare it as a | |
4165 | subroutine. | |
a0d0e21e | 4166 | |
54310121 | 4167 | =item Unrecognized character %s |
a0d0e21e | 4168 | |
54310121 | 4169 | (F) The Perl parser has no idea what to do with the specified character |
4170 | in your Perl script (or eval). Perhaps you tried to run a compressed | |
4171 | script, a binary program, or a directory as a Perl program. | |
a0d0e21e | 4172 | |
6df41af2 GS |
4173 | =item /%s/: Unrecognized escape \\%c in character class passed through |
4174 | ||
be771a83 GS |
4175 | (W regexp) You used a backslash-character combination which is not |
4176 | recognized by Perl inside character classes. The character was | |
4177 | understood literally. | |
6df41af2 | 4178 | |
2f7da168 RK |
4179 | =item Unrecognized escape \\%c passed through |
4180 | ||
4181 | (W misc) You used a backslash-character combination which is not | |
4182 | recognized by Perl. | |
4183 | ||
49704364 | 4184 | =item Unrecognized escape \\%c passed through in regex; marked by <-- HERE in m/%s/ |
6df41af2 | 4185 | |
be771a83 | 4186 | (W regexp) You used a backslash-character combination which is not |
b45f050a JF |
4187 | recognized by Perl. This combination appears in an interpolated variable or |
4188 | a C<'>-delimited regular expression. The character was understood | |
7253e4e3 RK |
4189 | literally. The <-- HERE shows in the regular expression about where the |
4190 | escape was discovered. | |
6df41af2 | 4191 | |
a0d0e21e LW |
4192 | =item Unrecognized signal name "%s" |
4193 | ||
be771a83 GS |
4194 | (F) You specified a signal name to the kill() function that was not |
4195 | recognized. Say C<kill -l> in your shell to see the valid signal names | |
4196 | on your system. | |
a0d0e21e | 4197 | |
90248788 | 4198 | =item Unrecognized switch: -%s (-h will show valid options) |
a0d0e21e | 4199 | |
be771a83 GS |
4200 | (F) You specified an illegal option to Perl. Don't do that. (If you |
4201 | think you didn't do that, check the #! line to see if it's supplying the | |
4202 | bad switch on your behalf.) | |
a0d0e21e LW |
4203 | |
4204 | =item Unsuccessful %s on filename containing newline | |
4205 | ||
be771a83 GS |
4206 | (W newline) A file operation was attempted on a filename, and that |
4207 | operation failed, PROBABLY because the filename contained a newline, | |
5b3eff12 | 4208 | PROBABLY because you forgot to chomp() it off. See L<perlfunc/chomp>. |
a0d0e21e LW |
4209 | |
4210 | =item Unsupported directory function "%s" called | |
4211 | ||
4212 | (F) Your machine doesn't support opendir() and readdir(). | |
4213 | ||
6df41af2 GS |
4214 | =item Unsupported function %s |
4215 | ||
4216 | (F) This machine doesn't implement the indicated function, apparently. | |
4217 | At least, Configure doesn't think so. | |
4218 | ||
54310121 | 4219 | =item Unsupported function fork |
4220 | ||
4221 | (F) Your version of executable does not support forking. | |
4222 | ||
be771a83 GS |
4223 | Note that under some systems, like OS/2, there may be different flavors |
4224 | of Perl executables, some of which may support fork, some not. Try | |
4225 | changing the name you call Perl by to C<perl_>, C<perl__>, and so on. | |
54310121 | 4226 | |
7aa207d6 | 4227 | =item Unsupported script encoding %s |
b250498f GS |
4228 | |
4229 | (F) Your program file begins with a Unicode Byte Order Mark (BOM) which | |
7aa207d6 | 4230 | declares it to be in a Unicode encoding that Perl cannot read. |
b250498f | 4231 | |
a0d0e21e LW |
4232 | =item Unsupported socket function "%s" called |
4233 | ||
4234 | (F) Your machine doesn't support the Berkeley socket mechanism, or at | |
4235 | least that's what Configure thought. | |
4236 | ||
6df41af2 | 4237 | =item Unterminated attribute list |
a0d0e21e | 4238 | |
be771a83 GS |
4239 | (F) The lexer found something other than a simple identifier at the |
4240 | start of an attribute, and it wasn't a semicolon or the start of a | |
4241 | block. Perhaps you terminated the parameter list of the previous | |
4242 | attribute too soon. See L<attributes>. | |
a0d0e21e | 4243 | |
09bef843 SB |
4244 | =item Unterminated attribute parameter in attribute list |
4245 | ||
be771a83 GS |
4246 | (F) The lexer saw an opening (left) parenthesis character while parsing |
4247 | an attribute list, but the matching closing (right) parenthesis | |
09bef843 SB |
4248 | character was not found. You may need to add (or remove) a backslash |
4249 | character to get your parentheses to balance. See L<attributes>. | |
4250 | ||
f1991046 GS |
4251 | =item Unterminated compressed integer |
4252 | ||
4253 | (F) An argument to unpack("w",...) was incompatible with the BER | |
4254 | compressed integer format and could not be converted to an integer. | |
4255 | See L<perlfunc/pack>. | |
4256 | ||
6df41af2 | 4257 | =item Unterminated <> operator |
09bef843 | 4258 | |
6df41af2 | 4259 | (F) The lexer saw a left angle bracket in a place where it was expecting |
be771a83 GS |
4260 | a term, so it's looking for the corresponding right angle bracket, and |
4261 | not finding it. Chances are you left some needed parentheses out | |
4262 | earlier in the line, and you really meant a "less than". | |
09bef843 | 4263 | |
6df41af2 | 4264 | =item untie attempted while %d inner references still exist |
a0d0e21e | 4265 | |
be771a83 GS |
4266 | (W untie) A copy of the object returned from C<tie> (or C<tied>) was |
4267 | still valid when C<untie> was called. | |
a0d0e21e | 4268 | |
8e11cd2b JC |
4269 | =item Usage: POSIX::%s(%s) |
4270 | ||
4271 | (F) You called a POSIX function with incorrect arguments. | |
4272 | See L<POSIX/FUNCTIONS> for more information. | |
4273 | ||
4274 | =item Usage: Win32::%s(%s) | |
4275 | ||
4276 | (F) You called a Win32 function with incorrect arguments. | |
4277 | See L<Win32> for more information. | |
4278 | ||
96ebfdd7 | 4279 | =item Useless (?-%s) - don't use /%s modifier in regex; marked by <-- HERE in m/%s/ |
9d1d55b5 | 4280 | |
96ebfdd7 RK |
4281 | (W regexp) You have used an internal modifier such as (?-o) that has no |
4282 | meaning unless removed from the entire regexp: | |
9d1d55b5 | 4283 | |
96ebfdd7 | 4284 | if ($string =~ /(?-o)$pattern/o) { ... } |
9d1d55b5 JP |
4285 | |
4286 | must be written as | |
4287 | ||
96ebfdd7 | 4288 | if ($string =~ /$pattern/) { ... } |
9d1d55b5 JP |
4289 | |
4290 | The <-- HERE shows in the regular expression about | |
4291 | where the problem was discovered. See L<perlre>. | |
4292 | ||
b4581f09 JH |
4293 | =item Useless localization of %s |
4294 | ||
4295 | (W syntax) The localization of lvalues such as C<local($x=10)> is | |
4296 | legal, but in fact the local() currently has no effect. This may change at | |
4297 | some point in the future, but in the meantime such code is discouraged. | |
4298 | ||
96ebfdd7 | 4299 | =item Useless (?%s) - use /%s modifier in regex; marked by <-- HERE in m/%s/ |
9d1d55b5 | 4300 | |
96ebfdd7 RK |
4301 | (W regexp) You have used an internal modifier such as (?o) that has no |
4302 | meaning unless applied to the entire regexp: | |
9d1d55b5 | 4303 | |
96ebfdd7 | 4304 | if ($string =~ /(?o)$pattern/) { ... } |
9d1d55b5 JP |
4305 | |
4306 | must be written as | |
4307 | ||
96ebfdd7 | 4308 | if ($string =~ /$pattern/o) { ... } |
9d1d55b5 JP |
4309 | |
4310 | The <-- HERE shows in the regular expression about | |
4311 | where the problem was discovered. See L<perlre>. | |
4312 | ||
6df41af2 | 4313 | =item Useless use of %s in void context |
a0d0e21e | 4314 | |
75b44862 | 4315 | (W void) You did something without a side effect in a context that does |
be771a83 GS |
4316 | nothing with the return value, such as a statement that doesn't return a |
4317 | value from a block, or the left side of a scalar comma operator. Very | |
4318 | often this points not to stupidity on your part, but a failure of Perl | |
4319 | to parse your program the way you thought it would. For example, you'd | |
4320 | get this if you mixed up your C precedence with Python precedence and | |
4321 | said | |
a0d0e21e | 4322 | |
6df41af2 | 4323 | $one, $two = 1, 2; |
748a9306 | 4324 | |
6df41af2 GS |
4325 | when you meant to say |
4326 | ||
4327 | ($one, $two) = (1, 2); | |
4328 | ||
4329 | Another common error is to use ordinary parentheses to construct a list | |
4330 | reference when you should be using square or curly brackets, for | |
4331 | example, if you say | |
4332 | ||
4333 | $array = (1,2); | |
4334 | ||
4335 | when you should have said | |
4336 | ||
4337 | $array = [1,2]; | |
4338 | ||
4339 | The square brackets explicitly turn a list value into a scalar value, | |
4340 | while parentheses do not. So when a parenthesized list is evaluated in | |
4341 | a scalar context, the comma is treated like C's comma operator, which | |
4342 | throws away the left argument, which is not what you want. See | |
4343 | L<perlref> for more on this. | |
4344 | ||
65191a1e BS |
4345 | This warning will not be issued for numerical constants equal to 0 or 1 |
4346 | since they are often used in statements like | |
4347 | ||
4358a253 | 4348 | 1 while sub_with_side_effects(); |
65191a1e BS |
4349 | |
4350 | String constants that would normally evaluate to 0 or 1 are warned | |
4351 | about. | |
4352 | ||
6df41af2 GS |
4353 | =item Useless use of "re" pragma |
4354 | ||
4355 | (W) You did C<use re;> without any arguments. That isn't very useful. | |
4356 | ||
a801c63c RGS |
4357 | =item Useless use of sort in scalar context |
4358 | ||
4359 | (W void) You used sort in scalar context, as in : | |
4360 | ||
4361 | my $x = sort @y; | |
4362 | ||
4363 | This is not very useful, and perl currently optimizes this away. | |
4364 | ||
de4864e4 JH |
4365 | =item Useless use of %s with no values |
4366 | ||
f87c3213 | 4367 | (W syntax) You used the push() or unshift() function with no arguments |
de4864e4 JH |
4368 | apart from the array, like C<push(@x)> or C<unshift(@foo)>. That won't |
4369 | usually have any effect on the array, so is completely useless. It's | |
4370 | possible in principle that push(@tied_array) could have some effect | |
4371 | if the array is tied to a class which implements a PUSH method. If so, | |
4372 | you can write it as C<push(@tied_array,())> to avoid this warning. | |
4373 | ||
6df41af2 GS |
4374 | =item "use" not allowed in expression |
4375 | ||
be771a83 GS |
4376 | (F) The "use" keyword is recognized and executed at compile time, and |
4377 | returns no useful value. See L<perlmod>. | |
748a9306 | 4378 | |
c47ff5f1 | 4379 | =item Use of bare << to mean <<"" is deprecated |
4633a7c4 | 4380 | |
be771a83 GS |
4381 | (D deprecated) You are now encouraged to use the explicitly quoted form |
4382 | if you wish to use an empty line as the terminator of the here-document. | |
4633a7c4 | 4383 | |
96ebfdd7 RK |
4384 | =item Use of chdir('') or chdir(undef) as chdir() deprecated |
4385 | ||
4386 | (D deprecated) chdir() with no arguments is documented to change to | |
4387 | $ENV{HOME} or $ENV{LOGDIR}. chdir(undef) and chdir('') share this | |
4388 | behavior, but that has been deprecated. In future versions they | |
4389 | will simply fail. | |
4390 | ||
4391 | Be careful to check that what you pass to chdir() is defined and not | |
4392 | blank, else you might find yourself in your home directory. | |
4393 | ||
64e578a2 MJD |
4394 | =item Use of /c modifier is meaningless in s/// |
4395 | ||
4396 | (W regexp) You used the /c modifier in a substitution. The /c | |
4397 | modifier is not presently meaningful in substitutions. | |
4398 | ||
4ac733c9 MJD |
4399 | =item Use of /c modifier is meaningless without /g |
4400 | ||
4401 | (W regexp) You used the /c modifier with a regex operand, but didn't | |
4402 | use the /g modifier. Currently, /c is meaningful only when /g is | |
4403 | used. (This may change in the future.) | |
4404 | ||
b6c83531 | 4405 | =item Use of freed value in iteration |
2f7da168 | 4406 | |
b6c83531 JH |
4407 | (F) Perhaps you modified the iterated array within the loop? |
4408 | This error is typically caused by code like the following: | |
2f7da168 RK |
4409 | |
4410 | @a = (3,4); | |
4411 | @a = () for (1,2,@a); | |
4412 | ||
4413 | You are not supposed to modify arrays while they are being iterated over. | |
4414 | For speed and efficiency reasons, Perl internally does not do full | |
4415 | reference-counting of iterated items, hence deleting such an item in the | |
4416 | middle of an iteration causes Perl to see a freed value. | |
4417 | ||
39b99f21 | 4418 | =item Use of *glob{FILEHANDLE} is deprecated |
4419 | ||
4420 | (D deprecated) You are now encouraged to use the shorter *glob{IO} form | |
4421 | to access the filehandle slot within a typeglob. | |
4422 | ||
96ebfdd7 | 4423 | =item Use of /g modifier is meaningless in split |
35ae6b54 | 4424 | |
96ebfdd7 RK |
4425 | (W regexp) You used the /g modifier on the pattern for a C<split> |
4426 | operator. Since C<split> always tries to match the pattern | |
4427 | repeatedly, the C</g> has no effect. | |
35ae6b54 | 4428 | |
a0d0e21e LW |
4429 | =item Use of implicit split to @_ is deprecated |
4430 | ||
be771a83 GS |
4431 | (D deprecated) It makes a lot of work for the compiler when you clobber |
4432 | a subroutine's argument list, so it's better if you assign the results | |
4433 | of a split() explicitly to an array (or list). | |
a0d0e21e | 4434 | |
dc848c6f | 4435 | =item Use of inherited AUTOLOAD for non-method %s() is deprecated |
4436 | ||
be771a83 GS |
4437 | (D deprecated) As an (ahem) accidental feature, C<AUTOLOAD> subroutines |
4438 | are looked up as methods (using the C<@ISA> hierarchy) even when the | |
4439 | subroutines to be autoloaded were called as plain functions (e.g. | |
4440 | C<Foo::bar()>), not as methods (e.g. C<< Foo->bar() >> or C<< | |
4441 | $obj->bar() >>). | |
dc848c6f | 4442 | |
be771a83 GS |
4443 | This bug will be rectified in future by using method lookup only for |
4444 | methods' C<AUTOLOAD>s. However, there is a significant base of existing | |
4445 | code that may be using the old behavior. So, as an interim step, Perl | |
4446 | currently issues an optional warning when non-methods use inherited | |
4447 | C<AUTOLOAD>s. | |
dc848c6f | 4448 | |
4449 | The simple rule is: Inheritance will not work when autoloading | |
be771a83 GS |
4450 | non-methods. The simple fix for old code is: In any module that used |
4451 | to depend on inheriting C<AUTOLOAD> for non-methods from a base class | |
4452 | named C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during | |
4453 | startup. | |
dc848c6f | 4454 | |
be771a83 GS |
4455 | In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> |
4456 | you should remove AutoLoader from @ISA and change C<use AutoLoader;> to | |
7b8d334a | 4457 | C<use AutoLoader 'AUTOLOAD';>. |
fb73857a | 4458 | |
6df41af2 GS |
4459 | =item Use of %s in printf format not supported |
4460 | ||
4461 | (F) You attempted to use a feature of printf that is accessible from | |
4462 | only C. This usually means there's a better way to do it in Perl. | |
4463 | ||
6df41af2 GS |
4464 | =item Use of %s is deprecated |
4465 | ||
75b44862 | 4466 | (D deprecated) The construct indicated is no longer recommended for use, |
be771a83 GS |
4467 | generally because there's a better way to do it, and also because the |
4468 | old way has bad side effects. | |
6df41af2 | 4469 | |
96ebfdd7 RK |
4470 | =item Use of -l on filehandle %s |
4471 | ||
4472 | (W io) A filehandle represents an opened file, and when you opened the file | |
4473 | it already went past any symlink you are presumably trying to look for. | |
4474 | The operation returned C<undef>. Use a filename instead. | |
4475 | ||
4476 | =item Use of "package" with no arguments is deprecated | |
4477 | ||
4478 | (D deprecated) You used the C<package> keyword without specifying a package | |
4479 | name. So no namespace is current at all. Using this can cause many | |
4480 | otherwise reasonable constructs to fail in baffling ways. C<use strict;> | |
4481 | instead. | |
4482 | ||
1f1cc344 | 4483 | =item Use of reference "%s" as array index |
d804643f | 4484 | |
77b96956 | 4485 | (W misc) You tried to use a reference as an array index; this probably |
1f1cc344 JH |
4486 | isn't what you mean, because references in numerical context tend |
4487 | to be huge numbers, and so usually indicates programmer error. | |
d804643f | 4488 | |
64977eb6 | 4489 | If you really do mean it, explicitly numify your reference, like so: |
1f1cc344 JH |
4490 | C<$array[0+$ref]>. This warning is not given for overloaded objects, |
4491 | either, because you can overload the numification and stringification | |
4492 | operators and then you assumedly know what you are doing. | |
d804643f | 4493 | |
85b81015 LW |
4494 | =item Use of reserved word "%s" is deprecated |
4495 | ||
be771a83 GS |
4496 | (D deprecated) The indicated bareword is a reserved word. Future |
4497 | versions of perl may use it as a keyword, so you're better off either | |
4498 | explicitly quoting the word in a manner appropriate for its context of | |
4499 | use, or using a different name altogether. The warning can be | |
4500 | suppressed for subroutine names by either adding a C<&> prefix, or using | |
4501 | a package qualifier, e.g. C<&our()>, or C<Foo::our()>. | |
85b81015 | 4502 | |
bbd7eb8a RD |
4503 | =item Use of tainted arguments in %s is deprecated |
4504 | ||
159f47d9 | 4505 | (W taint, deprecated) You have supplied C<system()> or C<exec()> with multiple |
bbd7eb8a RD |
4506 | arguments and at least one of them is tainted. This used to be allowed |
4507 | but will become a fatal error in a future version of perl. Untaint your | |
4508 | arguments. See L<perlsec>. | |
4509 | ||
cc95b072 | 4510 | =item Use of uninitialized value%s |
a0d0e21e | 4511 | |
be771a83 GS |
4512 | (W uninitialized) An undefined value was used as if it were already |
4513 | defined. It was interpreted as a "" or a 0, but maybe it was a mistake. | |
4514 | To suppress this warning assign a defined value to your variables. | |
a0d0e21e | 4515 | |
29489e7c DM |
4516 | To help you figure out what was undefined, perl will try to tell you the |
4517 | name of the variable (if any) that was undefined. In some cases it cannot | |
4518 | do this, so it also tells you what operation you used the undefined value | |
4519 | in. Note, however, that perl optimizes your program and the operation | |
4520 | displayed in the warning may not necessarily appear literally in your | |
4521 | program. For example, C<"that $foo"> is usually optimized into C<"that " | |
4522 | . $foo>, and the warning will refer to the C<concatenation (.)> operator, | |
4523 | even though there is no C<.> in your program. | |
e5be4a53 | 4524 | |
a1063b2d RH |
4525 | =item Using a hash as a reference is deprecated |
4526 | ||
496a33f5 | 4527 | (D deprecated) You tried to use a hash as a reference, as in |
1b1f1335 NIS |
4528 | C<< %foo->{"bar"} >> or C<< %$ref->{"hello"} >>. Versions of perl <= 5.6.1 |
4529 | used to allow this syntax, but shouldn't have. It is now deprecated, and will | |
496a33f5 | 4530 | be removed in a future version. |
a1063b2d RH |
4531 | |
4532 | =item Using an array as a reference is deprecated | |
4533 | ||
496a33f5 | 4534 | (D deprecated) You tried to use an array as a reference, as in |
1b1f1335 NIS |
4535 | C<< @foo->[23] >> or C<< @$ref->[99] >>. Versions of perl <= 5.6.1 used to |
4536 | allow this syntax, but shouldn't have. It is now deprecated, and will be | |
496a33f5 | 4537 | removed in a future version. |
a1063b2d | 4538 | |
9466bab6 JH |
4539 | =item UTF-16 surrogate %s |
4540 | ||
507b9800 JH |
4541 | (W utf8) You tried to generate half of an UTF-16 surrogate by |
4542 | requesting a Unicode character between the code points 0xD800 and | |
4543 | 0xDFFF (inclusive). That range is reserved exclusively for the use of | |
4544 | UTF-16 encoding (by having two 16-bit UCS-2 characters); but Perl | |
4545 | encodes its characters in UTF-8, so what you got is a very illegal | |
4546 | character. If you really know what you are doing you can turn off | |
4547 | this warning by C<no warnings 'utf8';>. | |
9466bab6 | 4548 | |
68dc0745 | 4549 | =item Value of %s can be "0"; test with defined() |
a6006777 | 4550 | |
75b44862 | 4551 | (W misc) In a conditional expression, you used <HANDLE>, <*> (glob), |
be771a83 GS |
4552 | C<each()>, or C<readdir()> as a boolean value. Each of these constructs |
4553 | can return a value of "0"; that would make the conditional expression | |
4554 | false, which is probably not what you intended. When using these | |
4555 | constructs in conditional expressions, test their values with the | |
4556 | C<defined> operator. | |
a6006777 | 4557 | |
f675dbe5 CB |
4558 | =item Value of CLI symbol "%s" too long |
4559 | ||
be771a83 GS |
4560 | (W misc) A warning peculiar to VMS. Perl tried to read the value of an |
4561 | %ENV element from a CLI symbol table, and found a resultant string | |
4562 | longer than 1024 characters. The return value has been truncated to | |
4563 | 1024 characters. | |
f675dbe5 | 4564 | |
b5c19bd7 | 4565 | =item Variable "%s" is not available |
44a8e56a | 4566 | |
b5c19bd7 DM |
4567 | (W closure) During compilation, an inner named subroutine or eval is |
4568 | attempting to capture an outer lexical that is not currently available. | |
42c13b56 | 4569 | This can happen for one of two reasons. First, the outer lexical may be |
b5c19bd7 DM |
4570 | declared in an outer anonymous subroutine that has not yet been created. |
4571 | (Remember that named subs are created at compile time, while anonymous | |
42c13b56 | 4572 | subs are created at run-time.) For example, |
44a8e56a | 4573 | |
b5c19bd7 | 4574 | sub { my $a; sub f { $a } } |
44a8e56a | 4575 | |
b5c19bd7 DM |
4576 | At the time that f is created, it can't capture the current value of $a, |
4577 | since the anonymous subroutine hasn't been created yet. Conversely, | |
4578 | the following won't give a warning since the anonymous subroutine has by | |
4579 | now been created and is live: | |
be771a83 | 4580 | |
b5c19bd7 DM |
4581 | sub { my $a; eval 'sub f { $a }' }->(); |
4582 | ||
4583 | The second situation is caused by an eval accessing a variable that has | |
4584 | gone out of scope, for example, | |
4585 | ||
4586 | sub f { | |
4587 | my $a; | |
4588 | sub { eval '$a' } | |
4589 | } | |
4590 | f()->(); | |
4591 | ||
4592 | Here, when the '$a' in the eval is being compiled, f() is not currently being | |
4593 | executed, so its $a is not available for capture. | |
44a8e56a | 4594 | |
b4581f09 JH |
4595 | =item Variable "%s" is not imported%s |
4596 | ||
4597 | (F) While "use strict" in effect, you referred to a global variable that | |
4598 | you apparently thought was imported from another module, because | |
4599 | something else of the same name (usually a subroutine) is exported by | |
4600 | that module. It usually means you put the wrong funny character on the | |
4601 | front of your variable. | |
4602 | ||
4603 | =item Variable length lookbehind not implemented in regex; marked by <-- HERE in m/%s/ | |
4604 | ||
4605 | (F) Lookbehind is allowed only for subexpressions whose length is fixed and | |
4606 | known at compile time. The <-- HERE shows in the regular expression about | |
4607 | where the problem was discovered. See L<perlre>. | |
4608 | ||
4609 | =item "%s" variable %s masks earlier declaration in same %s | |
4610 | ||
4611 | (W misc) A "my" or "our" variable has been redeclared in the current | |
4612 | scope or statement, effectively eliminating all access to the previous | |
4613 | instance. This is almost always a typographical error. Note that the | |
4614 | earlier variable will still exist until the end of the scope or until | |
4615 | all closure referents to it are destroyed. | |
4616 | ||
6df41af2 GS |
4617 | =item Variable syntax |
4618 | ||
4619 | (A) You've accidentally run your script through B<csh> instead | |
4620 | of Perl. Check the #! line, or manually feed your script into | |
4621 | Perl yourself. | |
4622 | ||
44a8e56a | 4623 | =item Variable "%s" will not stay shared |
4624 | ||
be771a83 | 4625 | (W closure) An inner (nested) I<named> subroutine is referencing a |
b5c19bd7 | 4626 | lexical variable defined in an outer named subroutine. |
44a8e56a | 4627 | |
b5c19bd7 | 4628 | When the inner subroutine is called, it will see the value of |
be771a83 GS |
4629 | the outer subroutine's variable as it was before and during the *first* |
4630 | call to the outer subroutine; in this case, after the first call to the | |
4631 | outer subroutine is complete, the inner and outer subroutines will no | |
4632 | longer share a common value for the variable. In other words, the | |
4633 | variable will no longer be shared. | |
44a8e56a | 4634 | |
44a8e56a | 4635 | This problem can usually be solved by making the inner subroutine |
4636 | anonymous, using the C<sub {}> syntax. When inner anonymous subs that | |
b5c19bd7 | 4637 | reference variables in outer subroutines are created, they |
be771a83 | 4638 | are automatically rebound to the current values of such variables. |
44a8e56a | 4639 | |
084610c0 GS |
4640 | =item Version number must be a constant number |
4641 | ||
4642 | (P) The attempt to translate a C<use Module n.n LIST> statement into | |
4643 | its equivalent C<BEGIN> block found an internal inconsistency with | |
4644 | the version number. | |
4645 | ||
68d932c8 JH |
4646 | =item v-string in use/require is non-portable |
4647 | ||
77b96956 | 4648 | (W portable) The use of v-strings is non-portable to older, pre-5.6, Perls. |
68d932c8 JH |
4649 | If you want your scripts to be backward portable, use the floating |
4650 | point version number: for example, instead of C<use 5.6.1> say | |
4651 | C<use 5.006_001>. This of course won't help: the older Perls | |
4652 | won't suddenly start understanding newer features, but at least | |
4653 | they will show a sensible error message indicating the required | |
4654 | minimum version. | |
4655 | ||
7e1af8bc | 4656 | =item Warning: something's wrong |
5f05dabc | 4657 | |
4658 | (W) You passed warn() an empty string (the equivalent of C<warn "">) or | |
4659 | you called it with no args and C<$_> was empty. | |
4660 | ||
f86702cc | 4661 | =item Warning: unable to close filehandle %s properly |
a0d0e21e | 4662 | |
be771a83 GS |
4663 | (S) The implicit close() done by an open() got an error indication on |
4664 | the close(). This usually indicates your file system ran out of disk | |
4665 | space. | |
a0d0e21e | 4666 | |
5f05dabc | 4667 | =item Warning: Use of "%s" without parentheses is ambiguous |
a0d0e21e | 4668 | |
be771a83 GS |
4669 | (S ambiguous) You wrote a unary operator followed by something that |
4670 | looks like a binary operator that could also have been interpreted as a | |
4671 | term or unary operator. For instance, if you know that the rand | |
4672 | function has a default argument of 1.0, and you write | |
a0d0e21e LW |
4673 | |
4674 | rand + 5; | |
4675 | ||
4676 | you may THINK you wrote the same thing as | |
4677 | ||
4678 | rand() + 5; | |
4679 | ||
4680 | but in actual fact, you got | |
4681 | ||
4682 | rand(+5); | |
4683 | ||
5f05dabc | 4684 | So put in parentheses to say what you really mean. |
a0d0e21e | 4685 | |
4b3603a4 JH |
4686 | =item Wide character in %s |
4687 | ||
62961d2e | 4688 | (W utf8) Perl met a wide character (>255) when it wasn't expecting |
cd28123a JH |
4689 | one. This warning is by default on for I/O (like print). The easiest |
4690 | way to quiet this warning is simply to add the C<:utf8> layer to the | |
4691 | output, e.g. C<binmode STDOUT, ':utf8'>. Another way to turn off the | |
4692 | warning is to add C<no warnings 'utf8';> but that is often closer to | |
4693 | cheating. In general, you are supposed to explicitly mark the | |
4694 | filehandle with an encoding, see L<open> and L<perlfunc/binmode>. | |
4b3603a4 | 4695 | |
49704364 WL |
4696 | =item Within []-length '%c' not allowed |
4697 | ||
4698 | (F) The count in the (un)pack template may be replaced by C<[TEMPLATE]> only if | |
4699 | C<TEMPLATE> always matches the same amount of packed bytes that can be | |
4700 | determined from the template alone. This is not possible if it contains an | |
4701 | of the codes @, /, U, u, w or a *-length. Redesign the template. | |
4702 | ||
9a7dcd9c | 4703 | =item write() on closed filehandle %s |
a0d0e21e | 4704 | |
be771a83 | 4705 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 4706 | before now. Check your control flow. |
a0d0e21e | 4707 | |
b4581f09 JH |
4708 | =item %s "\x%s" does not map to Unicode |
4709 | ||
4710 | When reading in different encodings Perl tries to map everything | |
4711 | into Unicode characters. The bytes you read in are not legal in | |
4712 | this encoding, for example | |
4713 | ||
4714 | utf8 "\xE4" does not map to Unicode | |
4715 | ||
4716 | if you try to read in the a-diaereses Latin-1 as UTF-8. | |
4717 | ||
49704364 | 4718 | =item 'X' outside of string |
a0d0e21e | 4719 | |
49704364 WL |
4720 | (F) You had a (un)pack template that specified a relative position before |
4721 | the beginning of the string being (un)packed. See L<perlfunc/pack>. | |
a0d0e21e | 4722 | |
49704364 | 4723 | =item 'x' outside of string in unpack |
a0d0e21e LW |
4724 | |
4725 | (F) You had a pack template that specified a relative position after | |
4726 | the end of the string being unpacked. See L<perlfunc/pack>. | |
4727 | ||
a0d0e21e LW |
4728 | =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! |
4729 | ||
5f05dabc | 4730 | (F) And you probably never will, because you probably don't have the |
a0d0e21e | 4731 | sources to your kernel, and your vendor probably doesn't give a rip |
1b1f1335 | 4732 | about what you want. Your best bet is to put a setuid C wrapper around |
496a33f5 | 4733 | your script. |
a0d0e21e LW |
4734 | |
4735 | =item You need to quote "%s" | |
4736 | ||
be771a83 GS |
4737 | (W syntax) You assigned a bareword as a signal handler name. |
4738 | Unfortunately, you already have a subroutine of that name declared, | |
4739 | which means that Perl 5 will try to call the subroutine when the | |
4740 | assignment is executed, which is probably not what you want. (If it IS | |
4741 | what you want, put an & in front.) | |
a0d0e21e | 4742 | |
6cfd5ea7 JH |
4743 | =item Your random numbers are not that random |
4744 | ||
4745 | (F) When trying to initialise the random seed for hashes, Perl could | |
4746 | not get any randomness out of your system. This usually indicates | |
4747 | Something Very Wrong. | |
4748 | ||
a0d0e21e LW |
4749 | =back |
4750 | ||
56e90b21 | 4751 | =cut |