Commit | Line | Data |
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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 | ||
c133c03f JH |
47 | =item A thread exited while %d other threads were still running |
48 | ||
49 | (W) When using threaded Perl, a thread (not necessarily the main | |
50 | thread) exited while there were still other threads running. | |
51 | Usually it's a good idea to first collect the return values of the | |
32419a4c | 52 | created threads by joining them, and only then exit from the main |
c133c03f JH |
53 | thread. See L<threads>. |
54 | ||
6df41af2 | 55 | =item accept() on closed socket %s |
33633739 | 56 | |
be771a83 GS |
57 | (W closed) You tried to do an accept on a closed socket. Did you forget |
58 | to check the return value of your socket() call? See | |
59 | L<perlfunc/accept>. | |
33633739 | 60 | |
6df41af2 | 61 | =item Allocation too large: %lx |
a0d0e21e | 62 | |
6df41af2 | 63 | (X) You can't allocate more than 64K on an MS-DOS machine. |
a0d0e21e | 64 | |
f61d411c | 65 | =item '!' allowed only after types %s |
ef54e1a4 | 66 | |
f61d411c JH |
67 | (F) The '!' is allowed in pack() and unpack() only after certain types. |
68 | See L<perlfunc/pack>. | |
ef54e1a4 | 69 | |
6df41af2 | 70 | =item Ambiguous call resolved as CORE::%s(), qualify as such or use & |
43192e07 | 71 | |
75b44862 | 72 | (W ambiguous) A subroutine you have declared has the same name as a Perl |
be771a83 GS |
73 | keyword, and you have used the name without qualification for calling |
74 | one or the other. Perl decided to call the builtin because the | |
75 | subroutine is not imported. | |
43192e07 | 76 | |
6df41af2 GS |
77 | To force interpretation as a subroutine call, either put an ampersand |
78 | before the subroutine name, or qualify the name with its package. | |
79 | Alternatively, you can import the subroutine (or pretend that it's | |
80 | imported with the C<use subs> pragma). | |
43192e07 | 81 | |
6df41af2 | 82 | To silently interpret it as the Perl operator, use the C<CORE::> prefix |
496a33f5 | 83 | on the operator (e.g. C<CORE::log($x)>) or declare the subroutine |
be771a83 GS |
84 | to be an object method (see L<perlsub/"Subroutine Attributes"> or |
85 | L<attributes>). | |
43192e07 | 86 | |
c2e66d9e GS |
87 | =item Ambiguous range in transliteration operator |
88 | ||
89 | (F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at | |
90 | all. To include a C<-> character in a transliteration, put it either | |
91 | first or last. (In the past, C<tr/a-z-0//> was synonymous with | |
92 | C<tr/a-y//>, which was probably not what you would have expected.) | |
93 | ||
6df41af2 | 94 | =item Ambiguous use of %s resolved as %s |
43192e07 | 95 | |
6df41af2 GS |
96 | (W ambiguous)(S) You said something that may not be interpreted the way |
97 | you thought. Normally it's pretty easy to disambiguate it by supplying | |
98 | a missing quote, operator, parenthesis pair or declaration. | |
a0d0e21e | 99 | |
6df41af2 | 100 | =item '|' and '<' may not both be specified on command line |
a0d0e21e | 101 | |
be771a83 GS |
102 | (F) An error peculiar to VMS. Perl does its own command line |
103 | redirection, and found that STDIN was a pipe, and that you also tried to | |
104 | redirect STDIN using '<'. Only one STDIN stream to a customer, please. | |
c9f97d15 | 105 | |
6df41af2 | 106 | =item '|' and '>' may not both be specified on command line |
1028017a | 107 | |
be771a83 GS |
108 | (F) An error peculiar to VMS. Perl does its own command line |
109 | redirection, and thinks you tried to redirect stdout both to a file and | |
110 | into a pipe to another command. You need to choose one or the other, | |
111 | though nothing's stopping you from piping into a program or Perl script | |
112 | which 'splits' output into two streams, such as | |
1028017a | 113 | |
6df41af2 GS |
114 | open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!"; |
115 | while (<STDIN>) { | |
116 | print; | |
117 | print OUT; | |
118 | } | |
119 | close OUT; | |
c9f97d15 | 120 | |
6df41af2 | 121 | =item Applying %s to %s will act on scalar(%s) |
eb6e2d6f | 122 | |
496a33f5 SC |
123 | (W misc) The pattern match (C<//>), substitution (C<s///>), and |
124 | transliteration (C<tr///>) operators work on scalar values. If you apply | |
be771a83 GS |
125 | one of them to an array or a hash, it will convert the array or hash to |
126 | a scalar value -- the length of an array, or the population info of a | |
127 | hash -- and then work on that scalar value. This is probably not what | |
128 | you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for | |
129 | alternatives. | |
eb6e2d6f | 130 | |
6df41af2 | 131 | =item Args must match #! line |
a0d0e21e | 132 | |
6df41af2 GS |
133 | (F) The setuid emulator requires that the arguments Perl was invoked |
134 | with match the arguments specified on the #! line. Since some systems | |
135 | impose a one-argument limit on the #! line, try combining switches; | |
136 | for example, turn C<-w -U> into C<-wU>. | |
a0d0e21e | 137 | |
6df41af2 | 138 | =item Arg too short for msgsnd |
76cd736e | 139 | |
6df41af2 | 140 | (F) msgsnd() requires a string at least as long as sizeof(long). |
76cd736e | 141 | |
8ea97a1e | 142 | =item %s argument is not a HASH or ARRAY element |
a0d0e21e | 143 | |
8ea97a1e | 144 | (F) The argument to exists() must be a hash or array element, such as: |
a0d0e21e LW |
145 | |
146 | $foo{$bar} | |
cb4f522a | 147 | $ref->{"susie"}[12] |
a0d0e21e | 148 | |
8ea97a1e | 149 | =item %s argument is not a HASH or ARRAY element or slice |
5f05dabc | 150 | |
be771a83 GS |
151 | (F) The argument to delete() must be either a hash or array element, |
152 | such as: | |
5f05dabc | 153 | |
154 | $foo{$bar} | |
cb4f522a | 155 | $ref->{"susie"}[12] |
5f05dabc | 156 | |
8ea97a1e | 157 | or a hash or array slice, such as: |
5f05dabc | 158 | |
6df41af2 GS |
159 | @foo[$bar, $baz, $xyzzy] |
160 | @{$ref->[12]}{"susie", "queue"} | |
5315574d | 161 | |
6df41af2 | 162 | =item %s argument is not a subroutine name |
a0d0e21e | 163 | |
6df41af2 | 164 | (F) The argument to exists() for C<exists &sub> must be a subroutine |
be771a83 GS |
165 | name, and not a subroutine call. C<exists &sub()> will generate this |
166 | error. | |
a0d0e21e | 167 | |
f86702cc | 168 | =item Argument "%s" isn't numeric%s |
a0d0e21e | 169 | |
be771a83 GS |
170 | (W numeric) The indicated string was fed as an argument to an operator |
171 | that expected a numeric value instead. If you're fortunate the message | |
172 | will identify which operator was so unfortunate. | |
a0d0e21e LW |
173 | |
174 | =item Array @%s missing the @ in argument %d of %s() | |
175 | ||
75b44862 GS |
176 | (D deprecated) Really old Perl let you omit the @ on array names in some |
177 | spots. This is now heavily deprecated. | |
a0d0e21e LW |
178 | |
179 | =item assertion botched: %s | |
180 | ||
181 | (P) The malloc package that comes with Perl had an internal failure. | |
182 | ||
183 | =item Assertion failed: file "%s" | |
184 | ||
185 | (P) A general assertion failed. The file in question must be examined. | |
186 | ||
187 | =item Assignment to both a list and a scalar | |
188 | ||
189 | (F) If you assign to a conditional operator, the 2nd and 3rd arguments | |
190 | must either both be scalars or both be lists. Otherwise Perl won't | |
191 | know which context to supply to the right side. | |
192 | ||
2393f1b9 | 193 | =item Attempt to access disallowed key '%s' in a restricted hash |
1b1f1335 | 194 | |
49293501 | 195 | (F) The failing code has attempted to get or set a key which is not in |
2393f1b9 | 196 | the current set of allowed keys of a restricted hash. |
49293501 | 197 | |
2393f1b9 | 198 | =item Attempt to clear a restricted hash |
49293501 | 199 | |
2393f1b9 | 200 | (F) It is currently not allowed to clear a restricted hash, even if the |
49293501 MS |
201 | new hash would contain the same keys as before. This may change in |
202 | the future. | |
203 | ||
2393f1b9 | 204 | =item Attempt to delete readonly key '%s' from a restricted hash |
49293501 MS |
205 | |
206 | (F) The failing code attempted to delete a key whose value has been | |
2393f1b9 | 207 | declared readonly from a restricted hash. |
49293501 | 208 | |
2393f1b9 | 209 | =item Attempt to delete disallowed key '%s' from a restricted hash |
49293501 | 210 | |
2393f1b9 JH |
211 | (F) The failing code attempted to delete from a restricted hash a key |
212 | which is not in its key set. | |
1b1f1335 | 213 | |
81689caa HS |
214 | =item Attempt to bless into a reference |
215 | ||
216 | (F) The CLASSNAME argument to the bless() operator is expected to be | |
217 | the name of the package to bless the resulting object into. You've | |
218 | supplied instead a reference to something: perhaps you wrote | |
219 | ||
220 | bless $self, $proto; | |
221 | ||
222 | when you intended | |
223 | ||
224 | bless $self, ref($proto) || $proto; | |
225 | ||
226 | If you actually want to bless into the stringified version | |
227 | of the reference supplied, you need to stringify it yourself, for | |
228 | example by: | |
229 | ||
230 | bless $self, "$proto"; | |
231 | ||
a0d0e21e LW |
232 | =item Attempt to free non-arena SV: 0x%lx |
233 | ||
be771a83 GS |
234 | (P internal) All SV objects are supposed to be allocated from arenas |
235 | that will be garbage collected on exit. An SV was discovered to be | |
236 | outside any of those arenas. | |
a0d0e21e | 237 | |
54310121 | 238 | =item Attempt to free nonexistent shared string |
bbce6d69 | 239 | |
be771a83 GS |
240 | (P internal) Perl maintains a reference counted internal table of |
241 | strings to optimize the storage and access of hash keys and other | |
242 | strings. This indicates someone tried to decrement the reference count | |
243 | of a string that can no longer be found in the table. | |
bbce6d69 | 244 | |
a0d0e21e LW |
245 | =item Attempt to free temp prematurely |
246 | ||
be771a83 GS |
247 | (W debugging) Mortalized values are supposed to be freed by the |
248 | free_tmps() routine. This indicates that something else is freeing the | |
249 | SV before the free_tmps() routine gets a chance, which means that the | |
250 | free_tmps() routine will be freeing an unreferenced scalar when it does | |
251 | try to free it. | |
a0d0e21e LW |
252 | |
253 | =item Attempt to free unreferenced glob pointers | |
254 | ||
e476b1b5 | 255 | (P internal) The reference counts got screwed up on symbol aliases. |
a0d0e21e LW |
256 | |
257 | =item Attempt to free unreferenced scalar | |
258 | ||
be771a83 GS |
259 | (W internal) Perl went to decrement the reference count of a scalar to |
260 | see if it would go to 0, and discovered that it had already gone to 0 | |
261 | earlier, and should have been freed, and in fact, probably was freed. | |
262 | This could indicate that SvREFCNT_dec() was called too many times, or | |
263 | that SvREFCNT_inc() was called too few times, or that the SV was | |
264 | mortalized when it shouldn't have been, or that memory has been | |
265 | corrupted. | |
a0d0e21e | 266 | |
dcdda58d GS |
267 | =item Attempt to join self |
268 | ||
269 | (F) You tried to join a thread from within itself, which is an | |
be771a83 GS |
270 | impossible task. You may be joining the wrong thread, or you may need |
271 | to move the join() to some other thread. | |
dcdda58d | 272 | |
84902520 TB |
273 | =item Attempt to pack pointer to temporary value |
274 | ||
be771a83 GS |
275 | (W pack) You tried to pass a temporary value (like the result of a |
276 | function, or a computed expression) to the "p" pack() template. This | |
277 | means the result contains a pointer to a location that could become | |
278 | invalid anytime, even before the end of the current statement. Use | |
279 | literals or global values as arguments to the "p" pack() template to | |
280 | avoid this warning. | |
84902520 | 281 | |
b7a902f4 | 282 | =item Attempt to use reference as lvalue in substr |
283 | ||
be771a83 GS |
284 | (W substr) You supplied a reference as the first argument to substr() |
285 | used as an lvalue, which is pretty strange. Perhaps you forgot to | |
286 | dereference it first. See L<perlfunc/substr>. | |
b7a902f4 | 287 | |
dc26df50 | 288 | =item Bad arg length for %s, is %d, should be %s |
a0d0e21e | 289 | |
be771a83 GS |
290 | (F) You passed a buffer of the wrong size to one of msgctl(), semctl() |
291 | or shmctl(). In C parlance, the correct sizes are, respectively, | |
5f05dabc | 292 | S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and |
a0d0e21e LW |
293 | S<sizeof(struct shmid_ds *)>. |
294 | ||
7a95317d GS |
295 | =item Bad evalled substitution pattern |
296 | ||
496a33f5 | 297 | (F) You've used the C</e> switch to evaluate the replacement for a |
7a95317d GS |
298 | substitution, but perl found a syntax error in the code to evaluate, |
299 | most likely an unexpected right brace '}'. | |
300 | ||
a0d0e21e LW |
301 | =item Bad filehandle: %s |
302 | ||
be771a83 GS |
303 | (F) A symbol was passed to something wanting a filehandle, but the |
304 | symbol has no filehandle associated with it. Perhaps you didn't do an | |
305 | open(), or did it in another package. | |
a0d0e21e LW |
306 | |
307 | =item Bad free() ignored | |
308 | ||
be771a83 GS |
309 | (S malloc) An internal routine called free() on something that had never |
310 | been malloc()ed in the first place. Mandatory, but can be disabled by | |
9ea8bc6d | 311 | setting environment variable C<PERL_BADFREE> to 0. |
33c8a3fe | 312 | |
9ea8bc6d | 313 | This message can be seen quite often with DB_File on systems with "hard" |
be771a83 GS |
314 | dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB> |
315 | which is left unnoticed if C<DB> uses I<forgiving> system malloc(). | |
a0d0e21e | 316 | |
aa689395 | 317 | =item Bad hash |
318 | ||
319 | (P) One of the internal hash routines was passed a null HV pointer. | |
320 | ||
6df41af2 GS |
321 | =item Badly placed ()'s |
322 | ||
323 | (A) You've accidentally run your script through B<csh> instead | |
324 | of Perl. Check the #! line, or manually feed your script into | |
325 | Perl yourself. | |
326 | ||
a0d0e21e LW |
327 | =item Bad name after %s:: |
328 | ||
be771a83 GS |
329 | (F) You started to name a symbol by using a package prefix, and then |
330 | didn't finish the symbol. In particular, you can't interpolate outside | |
331 | of quotes, so | |
a0d0e21e LW |
332 | |
333 | $var = 'myvar'; | |
334 | $sym = mypack::$var; | |
335 | ||
336 | is not the same as | |
337 | ||
338 | $var = 'myvar'; | |
339 | $sym = "mypack::$var"; | |
340 | ||
4ad56ec9 IZ |
341 | =item Bad realloc() ignored |
342 | ||
be771a83 GS |
343 | (S malloc) An internal routine called realloc() on something that had |
344 | never been malloc()ed in the first place. Mandatory, but can be disabled | |
345 | by setting environment variable C<PERL_BADFREE> to 1. | |
4ad56ec9 | 346 | |
a0d0e21e LW |
347 | =item Bad symbol for array |
348 | ||
349 | (P) An internal request asked to add an array entry to something that | |
350 | wasn't a symbol table entry. | |
351 | ||
352 | =item Bad symbol for filehandle | |
353 | ||
be771a83 GS |
354 | (P) An internal request asked to add a filehandle entry to something |
355 | that wasn't a symbol table entry. | |
a0d0e21e LW |
356 | |
357 | =item Bad symbol for hash | |
358 | ||
359 | (P) An internal request asked to add a hash entry to something that | |
360 | wasn't a symbol table entry. | |
361 | ||
34d09196 GS |
362 | =item Bareword found in conditional |
363 | ||
be771a83 GS |
364 | (W bareword) The compiler found a bareword where it expected a |
365 | conditional, which often indicates that an || or && was parsed as part | |
366 | of the last argument of the previous construct, for example: | |
34d09196 GS |
367 | |
368 | open FOO || die; | |
369 | ||
be771a83 GS |
370 | It may also indicate a misspelled constant that has been interpreted as |
371 | a bareword: | |
34d09196 GS |
372 | |
373 | use constant TYPO => 1; | |
374 | if (TYOP) { print "foo" } | |
375 | ||
376 | The C<strict> pragma is useful in avoiding such errors. | |
377 | ||
6df41af2 GS |
378 | =item Bareword "%s" not allowed while "strict subs" in use |
379 | ||
380 | (F) With "strict subs" in use, a bareword is only allowed as a | |
be771a83 GS |
381 | subroutine identifier, in curly brackets or to the left of the "=>" |
382 | symbol. Perhaps you need to predeclare a subroutine? | |
6df41af2 GS |
383 | |
384 | =item Bareword "%s" refers to nonexistent package | |
385 | ||
be771a83 GS |
386 | (W bareword) You used a qualified bareword of the form C<Foo::>, but the |
387 | compiler saw no other uses of that namespace before that point. Perhaps | |
388 | you need to predeclare a package? | |
6df41af2 | 389 | |
a0d0e21e LW |
390 | =item BEGIN failed--compilation aborted |
391 | ||
be771a83 GS |
392 | (F) An untrapped exception was raised while executing a BEGIN |
393 | subroutine. Compilation stops immediately and the interpreter is | |
394 | exited. | |
a0d0e21e | 395 | |
68dc0745 | 396 | =item BEGIN not safe after errors--compilation aborted |
397 | ||
398 | (F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which | |
be771a83 GS |
399 | implies a C<BEGIN {}>) after one or more compilation errors had already |
400 | occurred. Since the intended environment for the C<BEGIN {}> could not | |
401 | be guaranteed (due to the errors), and since subsequent code likely | |
402 | depends on its correct operation, Perl just gave up. | |
68dc0745 | 403 | |
6df41af2 GS |
404 | =item \1 better written as $1 |
405 | ||
be771a83 GS |
406 | (W syntax) Outside of patterns, backreferences live on as variables. |
407 | The use of backslashes is grandfathered on the right-hand side of a | |
408 | substitution, but stylistically it's better to use the variable form | |
409 | because other Perl programmers will expect it, and it works better if | |
410 | there are more than 9 backreferences. | |
6df41af2 | 411 | |
252aa082 JH |
412 | =item Binary number > 0b11111111111111111111111111111111 non-portable |
413 | ||
e476b1b5 | 414 | (W portable) The binary number you specified is larger than 2**32-1 |
9e24b6e2 JH |
415 | (4294967295) and therefore non-portable between systems. See |
416 | L<perlport> for more on portability concerns. | |
252aa082 | 417 | |
69282e91 | 418 | =item bind() on closed socket %s |
a0d0e21e | 419 | |
be771a83 GS |
420 | (W closed) You tried to do a bind on a closed socket. Did you forget to |
421 | check the return value of your socket() call? See L<perlfunc/bind>. | |
a0d0e21e | 422 | |
c289d2f7 JH |
423 | =item binmode() on closed filehandle %s |
424 | ||
425 | (W unopened) You tried binmode() on a filehandle that was never opened. | |
426 | Check you control flow and number of arguments. | |
427 | ||
c5a0f51a JH |
428 | =item Bit vector size > 32 non-portable |
429 | ||
e476b1b5 | 430 | (W portable) Using bit vector sizes larger than 32 is non-portable. |
c5a0f51a | 431 | |
4633a7c4 LW |
432 | =item Bizarre copy of %s in %s |
433 | ||
be771a83 | 434 | (P) Perl detected an attempt to copy an internal value that is not |
b45f050a | 435 | copyable. |
4633a7c4 | 436 | |
6df41af2 GS |
437 | =item B<-P> not allowed for setuid/setgid script |
438 | ||
439 | (F) The script would have to be opened by the C preprocessor by name, | |
440 | which provides a race condition that breaks security. | |
441 | ||
f675dbe5 CB |
442 | =item Buffer overflow in prime_env_iter: %s |
443 | ||
be771a83 GS |
444 | (W internal) A warning peculiar to VMS. While Perl was preparing to |
445 | iterate over %ENV, it encountered a logical name or symbol definition | |
446 | which was too long, so it was truncated to the string shown. | |
f675dbe5 | 447 | |
a0d0e21e LW |
448 | =item Callback called exit |
449 | ||
4929bf7b | 450 | (F) A subroutine invoked from an external package via call_sv() |
a0d0e21e LW |
451 | exited by calling exit. |
452 | ||
6df41af2 | 453 | =item %s() called too early to check prototype |
f675dbe5 | 454 | |
be771a83 GS |
455 | (W prototype) You've called a function that has a prototype before the |
456 | parser saw a definition or declaration for it, and Perl could not check | |
457 | that the call conforms to the prototype. You need to either add an | |
458 | early prototype declaration for the subroutine in question, or move the | |
459 | subroutine definition ahead of the call to get proper prototype | |
460 | checking. Alternatively, if you are certain that you're calling the | |
461 | function correctly, you may put an ampersand before the name to avoid | |
462 | the warning. See L<perlsub>. | |
f675dbe5 | 463 | |
6df41af2 | 464 | =item / cannot take a count |
a0d0e21e | 465 | |
be771a83 GS |
466 | (F) You had an unpack template indicating a counted-length string, but |
467 | you have also specified an explicit size for the string. See | |
468 | L<perlfunc/pack>. | |
a0d0e21e LW |
469 | |
470 | =item Can't bless non-reference value | |
471 | ||
472 | (F) Only hard references may be blessed. This is how Perl "enforces" | |
473 | encapsulation of objects. See L<perlobj>. | |
474 | ||
a0d0e21e LW |
475 | =item Can't call method "%s" in empty package "%s" |
476 | ||
477 | (F) You called a method correctly, and it correctly indicated a package | |
478 | functioning as a class, but that package doesn't have ANYTHING defined | |
479 | in it, let alone methods. See L<perlobj>. | |
480 | ||
6df41af2 GS |
481 | =item Can't call method "%s" on an undefined value |
482 | ||
483 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
484 | object reference or package name contains an undefined value. Something |
485 | like this will reproduce the error: | |
6df41af2 GS |
486 | |
487 | $BADREF = undef; | |
488 | process $BADREF 1,2,3; | |
489 | $BADREF->process(1,2,3); | |
490 | ||
a0d0e21e LW |
491 | =item Can't call method "%s" on unblessed reference |
492 | ||
54310121 | 493 | (F) A method call must know in what package it's supposed to run. It |
be771a83 GS |
494 | ordinarily finds this out from the object reference you supply, but you |
495 | didn't supply an object reference in this case. A reference isn't an | |
496 | object reference until it has been blessed. See L<perlobj>. | |
a0d0e21e LW |
497 | |
498 | =item Can't call method "%s" without a package or object reference | |
499 | ||
500 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
501 | object reference or package name contains an expression that returns a |
502 | defined value which is neither an object reference nor a package name. | |
72b5445b GS |
503 | Something like this will reproduce the error: |
504 | ||
505 | $BADREF = 42; | |
506 | process $BADREF 1,2,3; | |
507 | $BADREF->process(1,2,3); | |
508 | ||
a0d0e21e LW |
509 | =item Can't chdir to %s |
510 | ||
511 | (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory | |
512 | that you can chdir to, possibly because it doesn't exist. | |
513 | ||
0545a864 | 514 | =item Can't check filesystem of script "%s" for nosuid |
104d25b7 | 515 | |
be771a83 GS |
516 | (P) For some reason you can't check the filesystem of the script for |
517 | nosuid. | |
104d25b7 | 518 | |
6df41af2 GS |
519 | =item Can't coerce array into hash |
520 | ||
521 | (F) You used an array where a hash was expected, but the array has no | |
522 | information on how to map from keys to array indices. You can do that | |
523 | only with arrays that have a hash reference at index 0. | |
524 | ||
a0d0e21e LW |
525 | =item Can't coerce %s to integer in %s |
526 | ||
527 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 528 | (typeglobs), can't be forced to stop being what they are. So you can't |
a0d0e21e LW |
529 | say things like: |
530 | ||
531 | *foo += 1; | |
532 | ||
533 | You CAN say | |
534 | ||
535 | $foo = *foo; | |
536 | $foo += 1; | |
537 | ||
538 | but then $foo no longer contains a glob. | |
539 | ||
540 | =item Can't coerce %s to number in %s | |
541 | ||
542 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 543 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e LW |
544 | |
545 | =item Can't coerce %s to string in %s | |
546 | ||
547 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 548 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e LW |
549 | |
550 | =item Can't create pipe mailbox | |
551 | ||
be771a83 GS |
552 | (P) An error peculiar to VMS. The process is suffering from exhausted |
553 | quotas or other plumbing problems. | |
a0d0e21e | 554 | |
eb64745e | 555 | =item Can't declare class for non-scalar %s in "%s" |
a0d0e21e | 556 | |
2f7e735d AMS |
557 | (F) Currently, only scalar variables can be declared with a specific |
558 | class qualifier in a "my" or "our" declaration. The semantics may be | |
559 | extended for other types of variables in future. | |
eb64745e GS |
560 | |
561 | =item Can't declare %s in "%s" | |
562 | ||
563 | (F) Only scalar, array, and hash variables may be declared as "my" or | |
564 | "our" variables. They must have ordinary identifiers as names. | |
a0d0e21e | 565 | |
6df41af2 GS |
566 | =item Can't do inplace edit: %s is not a regular file |
567 | ||
be771a83 GS |
568 | (S inplace) You tried to use the B<-i> switch on a special file, such as |
569 | a file in /dev, or a FIFO. The file was ignored. | |
6df41af2 | 570 | |
a0d0e21e LW |
571 | =item Can't do inplace edit on %s: %s |
572 | ||
be771a83 GS |
573 | (S inplace) The creation of the new file failed for the indicated |
574 | reason. | |
a0d0e21e | 575 | |
54310121 | 576 | =item Can't do inplace edit without backup |
a0d0e21e | 577 | |
be771a83 GS |
578 | (F) You're on a system such as MS-DOS that gets confused if you try |
579 | reading from a deleted (but still opened) file. You have to say | |
580 | C<-i.bak>, or some such. | |
a0d0e21e | 581 | |
10f9c03d | 582 | =item Can't do inplace edit: %s would not be unique |
a0d0e21e | 583 | |
e476b1b5 | 584 | (S inplace) Your filesystem does not support filenames longer than 14 |
10f9c03d CK |
585 | characters and Perl was unable to create a unique filename during |
586 | inplace editing with the B<-i> switch. The file was ignored. | |
a0d0e21e | 587 | |
7253e4e3 | 588 | =item Can't do {n,m} with n > m in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 589 | |
b45f050a | 590 | (F) Minima must be less than or equal to maxima. If you really want your |
7253e4e3 | 591 | regexp to match something 0 times, just put {0}. The <-- HERE shows in the |
b45f050a | 592 | regular expression about where the problem was discovered. See L<perlre>. |
a0d0e21e LW |
593 | |
594 | =item Can't do setegid! | |
595 | ||
be771a83 GS |
596 | (P) The setegid() call failed for some reason in the setuid emulator of |
597 | suidperl. | |
a0d0e21e LW |
598 | |
599 | =item Can't do seteuid! | |
600 | ||
601 | (P) The setuid emulator of suidperl failed for some reason. | |
602 | ||
603 | =item Can't do setuid | |
604 | ||
be771a83 GS |
605 | (F) This typically means that ordinary perl tried to exec suidperl to do |
606 | setuid emulation, but couldn't exec it. It looks for a name of the form | |
607 | sperl5.000 in the same directory that the perl executable resides under | |
608 | the name perl5.000, typically /usr/local/bin on Unix machines. If the | |
609 | file is there, check the execute permissions. If it isn't, ask your | |
610 | sysadmin why he and/or she removed it. | |
a0d0e21e LW |
611 | |
612 | =item Can't do waitpid with flags | |
613 | ||
be771a83 GS |
614 | (F) This machine doesn't have either waitpid() or wait4(), so only |
615 | waitpid() without flags is emulated. | |
a0d0e21e | 616 | |
a0d0e21e LW |
617 | =item Can't emulate -%s on #! line |
618 | ||
be771a83 GS |
619 | (F) The #! line specifies a switch that doesn't make sense at this |
620 | point. For example, it'd be kind of silly to put a B<-x> on the #! | |
621 | line. | |
a0d0e21e LW |
622 | |
623 | =item Can't exec "%s": %s | |
624 | ||
d1be9408 | 625 | (W exec) A system(), exec(), or piped open call could not execute the |
be771a83 GS |
626 | named program for the indicated reason. Typical reasons include: the |
627 | permissions were wrong on the file, the file wasn't found in | |
628 | C<$ENV{PATH}>, the executable in question was compiled for another | |
629 | architecture, or the #! line in a script points to an interpreter that | |
630 | can't be run for similar reasons. (Or maybe your system doesn't support | |
631 | #! at all.) | |
a0d0e21e LW |
632 | |
633 | =item Can't exec %s | |
634 | ||
be771a83 GS |
635 | (F) Perl was trying to execute the indicated program for you because |
636 | that's what the #! line said. If that's not what you wanted, you may | |
637 | need to mention "perl" on the #! line somewhere. | |
a0d0e21e LW |
638 | |
639 | =item Can't execute %s | |
640 | ||
be771a83 GS |
641 | (F) You used the B<-S> switch, but the copies of the script to execute |
642 | found in the PATH did not have correct permissions. | |
2a92aaa0 | 643 | |
6df41af2 | 644 | =item Can't find an opnumber for "%s" |
2a92aaa0 | 645 | |
be771a83 GS |
646 | (F) A string of a form C<CORE::word> was given to prototype(), but there |
647 | is no builtin with the name C<word>. | |
6df41af2 | 648 | |
56ca2fc0 JH |
649 | =item Can't find %s character property "%s" |
650 | ||
651 | (F) You used C<\p{}> or C<\P{}> but the character property by that name | |
89d60977 | 652 | could not be found. Maybe you misspelled the name of the property |
56ca2fc0 JH |
653 | (remember that the names of character properties consist only of |
654 | alphanumeric characters), or maybe you forgot the C<Is> or C<In> prefix? | |
655 | ||
6df41af2 GS |
656 | =item Can't find label %s |
657 | ||
be771a83 GS |
658 | (F) You said to goto a label that isn't mentioned anywhere that it's |
659 | possible for us to go to. See L<perlfunc/goto>. | |
2a92aaa0 GS |
660 | |
661 | =item Can't find %s on PATH | |
662 | ||
be771a83 GS |
663 | (F) You used the B<-S> switch, but the script to execute could not be |
664 | found in the PATH. | |
a0d0e21e | 665 | |
6df41af2 | 666 | =item Can't find %s on PATH, '.' not in PATH |
a0d0e21e | 667 | |
be771a83 GS |
668 | (F) You used the B<-S> switch, but the script to execute could not be |
669 | found in the PATH, or at least not with the correct permissions. The | |
670 | script exists in the current directory, but PATH prohibits running it. | |
a0d0e21e LW |
671 | |
672 | =item Can't find string terminator %s anywhere before EOF | |
673 | ||
be771a83 GS |
674 | (F) Perl strings can stretch over multiple lines. This message means |
675 | that the closing delimiter was omitted. Because bracketed quotes count | |
676 | nesting levels, the following is missing its final parenthesis: | |
a0d0e21e | 677 | |
fb73857a | 678 | print q(The character '(' starts a side comment.); |
679 | ||
be771a83 GS |
680 | If you're getting this error from a here-document, you may have included |
681 | unseen whitespace before or after your closing tag. A good programmer's | |
682 | editor will have a way to help you find these characters. | |
a0d0e21e | 683 | |
64977eb6 | 684 | =item Can't find %s property definition %s |
0103b764 | 685 | |
77b96956 RGS |
686 | (F) You may have tried to use C<\p> which means a Unicode property (for |
687 | example C<\p{Lu}> is all uppercase letters). If you did mean to use a | |
bc45ce41 JH |
688 | Unicode property, see L<perlunicode> for the list of known properties. |
689 | If you didn't mean to use a Unicode property, escape the C<\p>, either | |
77b96956 | 690 | by C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, until |
f91328b7 | 691 | possible C<\E>). |
0103b764 | 692 | |
a0d0e21e LW |
693 | =item Can't fork |
694 | ||
be771a83 GS |
695 | (F) A fatal error occurred while trying to fork while opening a |
696 | pipeline. | |
a0d0e21e | 697 | |
748a9306 LW |
698 | =item Can't get filespec - stale stat buffer? |
699 | ||
be771a83 GS |
700 | (S) A warning peculiar to VMS. This arises because of the difference |
701 | between access checks under VMS and under the Unix model Perl assumes. | |
702 | Under VMS, access checks are done by filename, rather than by bits in | |
703 | the stat buffer, so that ACLs and other protections can be taken into | |
704 | account. Unfortunately, Perl assumes that the stat buffer contains all | |
705 | the necessary information, and passes it, instead of the filespec, to | |
706 | the access checking routine. It will try to retrieve the filespec using | |
707 | the device name and FID present in the stat buffer, but this works only | |
708 | if you haven't made a subsequent call to the CRTL stat() routine, | |
709 | because the device name is overwritten with each call. If this warning | |
710 | appears, the name lookup failed, and the access checking routine gave up | |
711 | and returned FALSE, just to be conservative. (Note: The access checking | |
712 | routine knows about the Perl C<stat> operator and file tests, so you | |
713 | shouldn't ever see this warning in response to a Perl command; it arises | |
714 | only if some internal code takes stat buffers lightly.) | |
748a9306 | 715 | |
a0d0e21e LW |
716 | =item Can't get pipe mailbox device name |
717 | ||
be771a83 GS |
718 | (P) An error peculiar to VMS. After creating a mailbox to act as a |
719 | pipe, Perl can't retrieve its name for later use. | |
a0d0e21e LW |
720 | |
721 | =item Can't get SYSGEN parameter value for MAXBUF | |
722 | ||
748a9306 LW |
723 | (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your |
724 | mailbox buffers to be, and didn't get an answer. | |
a0d0e21e | 725 | |
6df41af2 | 726 | =item Can't "goto" into the middle of a foreach loop |
a0d0e21e | 727 | |
be771a83 GS |
728 | (F) A "goto" statement was executed to jump into the middle of a foreach |
729 | loop. You can't get there from here. See L<perlfunc/goto>. | |
6df41af2 GS |
730 | |
731 | =item Can't "goto" out of a pseudo block | |
732 | ||
be771a83 GS |
733 | (F) A "goto" statement was executed to jump out of what might look like |
734 | a block, except that it isn't a proper block. This usually occurs if | |
735 | you tried to jump out of a sort() block or subroutine, which is a no-no. | |
736 | See L<perlfunc/goto>. | |
a0d0e21e | 737 | |
b150fb22 RH |
738 | =item Can't goto subroutine from an eval-string |
739 | ||
be771a83 GS |
740 | (F) The "goto subroutine" call can't be used to jump out of an eval |
741 | "string". (You can use it to jump out of an eval {BLOCK}, but you | |
742 | probably don't want to.) | |
b150fb22 | 743 | |
6df41af2 GS |
744 | =item Can't goto subroutine outside a subroutine |
745 | ||
be771a83 GS |
746 | (F) The deeply magical "goto subroutine" call can only replace one |
747 | subroutine call for another. It can't manufacture one out of whole | |
748 | cloth. In general you should be calling it out of only an AUTOLOAD | |
749 | routine anyway. See L<perlfunc/goto>. | |
6df41af2 | 750 | |
0b5b802d GS |
751 | =item Can't ignore signal CHLD, forcing to default |
752 | ||
be771a83 GS |
753 | (W signal) Perl has detected that it is being run with the SIGCHLD |
754 | signal (sometimes known as SIGCLD) disabled. Since disabling this | |
755 | signal will interfere with proper determination of exit status of child | |
756 | processes, Perl has reset the signal to its default value. This | |
757 | situation typically indicates that the parent program under which Perl | |
758 | may be running (e.g. cron) is being very careless. | |
0b5b802d | 759 | |
6df41af2 | 760 | =item Can't "last" outside a loop block |
4633a7c4 | 761 | |
6df41af2 | 762 | (F) A "last" statement was executed to break out of the current block, |
be771a83 GS |
763 | except that there's this itty bitty problem called there isn't a current |
764 | block. Note that an "if" or "else" block doesn't count as a "loopish" | |
765 | block, as doesn't a block given to sort(), map() or grep(). You can | |
766 | usually double the curlies to get the same effect though, because the | |
767 | inner curlies will be considered a block that loops once. See | |
768 | L<perlfunc/last>. | |
4633a7c4 | 769 | |
748a9306 LW |
770 | =item Can't localize lexical variable %s |
771 | ||
2ba9eb46 | 772 | (F) You used local on a variable name that was previously declared as a |
748a9306 LW |
773 | lexical variable using "my". This is not allowed. If you want to |
774 | localize a package variable of the same name, qualify it with the | |
775 | package name. | |
776 | ||
6df41af2 | 777 | =item Can't localize through a reference |
4727527e | 778 | |
6df41af2 GS |
779 | (F) You said something like C<local $$ref>, which Perl can't currently |
780 | handle, because when it goes to restore the old value of whatever $ref | |
be771a83 | 781 | pointed to after the scope of the local() is finished, it can't be sure |
64977eb6 | 782 | that $ref will still be a reference. |
4727527e | 783 | |
ea071790 | 784 | =item Can't locate %s |
ec889f3a GS |
785 | |
786 | (F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be | |
787 | found. Perl looks for the file in all the locations mentioned in @INC, | |
be771a83 GS |
788 | unless the file name included the full path to the file. Perhaps you |
789 | need to set the PERL5LIB or PERL5OPT environment variable to say where | |
790 | the extra library is, or maybe the script needs to add the library name | |
791 | to @INC. Or maybe you just misspelled the name of the file. See | |
792 | L<perlfunc/require> and L<lib>. | |
a0d0e21e | 793 | |
6df41af2 GS |
794 | =item Can't locate auto/%s.al in @INC |
795 | ||
be771a83 GS |
796 | (F) A function (or method) was called in a package which allows |
797 | autoload, but there is no function to autoload. Most probable causes | |
798 | are a misprint in a function/method name or a failure to C<AutoSplit> | |
799 | the file, say, by doing C<make install>. | |
6df41af2 | 800 | |
a0d0e21e LW |
801 | =item Can't locate object method "%s" via package "%s" |
802 | ||
803 | (F) You called a method correctly, and it correctly indicated a package | |
804 | functioning as a class, but that package doesn't define that particular | |
2ba9eb46 | 805 | method, nor does any of its base classes. See L<perlobj>. |
a0d0e21e | 806 | |
d28b25d0 JH |
807 | =item Can't locate PerlIO%s |
808 | ||
809 | (F) You tried to use in open() a PerlIO layer that does not exist, | |
3ad17c7e | 810 | e.g. open(FH, ">:nosuchlayer", "somefile"). |
d28b25d0 | 811 | |
c1899e02 GS |
812 | =item (perhaps you forgot to load "%s"?) |
813 | ||
814 | (F) This is an educated guess made in conjunction with the message | |
815 | "Can't locate object method \"%s\" via package \"%s\"". It often means | |
816 | that a method requires a package that has not been loaded. | |
817 | ||
a0d0e21e LW |
818 | =item Can't locate package %s for @%s::ISA |
819 | ||
be771a83 GS |
820 | (W syntax) The @ISA array contained the name of another package that |
821 | doesn't seem to exist. | |
a0d0e21e | 822 | |
3e3baf6d TB |
823 | =item Can't make list assignment to \%ENV on this system |
824 | ||
be771a83 GS |
825 | (F) List assignment to %ENV is not supported on some systems, notably |
826 | VMS. | |
3e3baf6d | 827 | |
a0d0e21e LW |
828 | =item Can't modify %s in %s |
829 | ||
be771a83 GS |
830 | (F) You aren't allowed to assign to the item indicated, or otherwise try |
831 | to change it, such as with an auto-increment. | |
a0d0e21e | 832 | |
54310121 | 833 | =item Can't modify nonexistent substring |
a0d0e21e LW |
834 | |
835 | (P) The internal routine that does assignment to a substr() was handed | |
836 | a NULL. | |
837 | ||
6df41af2 GS |
838 | =item Can't modify non-lvalue subroutine call |
839 | ||
840 | (F) Subroutines meant to be used in lvalue context should be declared as | |
841 | such, see L<perlsub/"Lvalue subroutines">. | |
842 | ||
5f05dabc | 843 | =item Can't msgrcv to read-only var |
a0d0e21e | 844 | |
5f05dabc | 845 | (F) The target of a msgrcv must be modifiable to be used as a receive |
a0d0e21e LW |
846 | buffer. |
847 | ||
6df41af2 GS |
848 | =item Can't "next" outside a loop block |
849 | ||
850 | (F) A "next" statement was executed to reiterate the current block, but | |
851 | there isn't a current block. Note that an "if" or "else" block doesn't | |
be771a83 GS |
852 | count as a "loopish" block, as doesn't a block given to sort(), map() or |
853 | grep(). You can usually double the curlies to get the same effect | |
854 | though, because the inner curlies will be considered a block that loops | |
855 | once. See L<perlfunc/next>. | |
6df41af2 | 856 | |
a0d0e21e LW |
857 | =item Can't open %s: %s |
858 | ||
c47ff5f1 | 859 | (S inplace) The implicit opening of a file through use of the C<< <> >> |
08e9d68e DD |
860 | filehandle, either implicitly under the C<-n> or C<-p> command-line |
861 | switches, or explicitly, failed for the indicated reason. Usually this | |
be771a83 GS |
862 | is because you don't have read permission for a file which you named on |
863 | the command line. | |
a0d0e21e | 864 | |
9a869a14 RGS |
865 | =item Can't open a reference |
866 | ||
867 | (W io) You tried to open a scalar reference for reading or writing, | |
868 | using the 3-arg open() syntax : | |
869 | ||
870 | open FH, '>', $ref; | |
871 | ||
872 | but your version of perl is compiled without perlio, and this form of | |
873 | open is not supported. | |
874 | ||
a0d0e21e LW |
875 | =item Can't open bidirectional pipe |
876 | ||
be771a83 GS |
877 | (W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported. |
878 | You can try any of several modules in the Perl library to do this, such | |
879 | as IPC::Open2. Alternately, direct the pipe's output to a file using | |
880 | ">", and then read it in under a different file handle. | |
a0d0e21e | 881 | |
748a9306 LW |
882 | =item Can't open error file %s as stderr |
883 | ||
be771a83 GS |
884 | (F) An error peculiar to VMS. Perl does its own command line |
885 | redirection, and couldn't open the file specified after '2>' or '2>>' on | |
886 | the command line for writing. | |
748a9306 LW |
887 | |
888 | =item Can't open input file %s as stdin | |
889 | ||
be771a83 GS |
890 | (F) An error peculiar to VMS. Perl does its own command line |
891 | redirection, and couldn't open the file specified after '<' on the | |
892 | command line for reading. | |
748a9306 LW |
893 | |
894 | =item Can't open output file %s as stdout | |
895 | ||
be771a83 GS |
896 | (F) An error peculiar to VMS. Perl does its own command line |
897 | redirection, and couldn't open the file specified after '>' or '>>' on | |
898 | the command line for writing. | |
748a9306 LW |
899 | |
900 | =item Can't open output pipe (name: %s) | |
901 | ||
be771a83 GS |
902 | (P) An error peculiar to VMS. Perl does its own command line |
903 | redirection, and couldn't open the pipe into which to send data destined | |
904 | for stdout. | |
748a9306 | 905 | |
584d69ec | 906 | =item Can't open perl script%s: %s |
a0d0e21e LW |
907 | |
908 | (F) The script you specified can't be opened for the indicated reason. | |
909 | ||
6df41af2 GS |
910 | =item Can't read CRTL environ |
911 | ||
912 | (S) A warning peculiar to VMS. Perl tried to read an element of %ENV | |
913 | from the CRTL's internal environment array and discovered the array was | |
914 | missing. You need to figure out where your CRTL misplaced its environ | |
be771a83 GS |
915 | or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not |
916 | searched. | |
6df41af2 | 917 | |
7bac28a0 | 918 | =item Can't redefine active sort subroutine %s |
919 | ||
920 | (F) Perl optimizes the internal handling of sort subroutines and keeps | |
be771a83 GS |
921 | pointers into them. You tried to redefine one such sort subroutine when |
922 | it was currently active, which is not allowed. If you really want to do | |
7bac28a0 | 923 | this, you should write C<sort { &func } @x> instead of C<sort func @x>. |
924 | ||
6df41af2 GS |
925 | =item Can't "redo" outside a loop block |
926 | ||
927 | (F) A "redo" statement was executed to restart the current block, but | |
928 | there isn't a current block. Note that an "if" or "else" block doesn't | |
929 | count as a "loopish" block, as doesn't a block given to sort(), map() | |
930 | or grep(). You can usually double the curlies to get the same effect | |
931 | though, because the inner curlies will be considered a block that | |
932 | loops once. See L<perlfunc/redo>. | |
933 | ||
64977eb6 | 934 | =item Can't remove %s: %s, skipping file |
10f9c03d | 935 | |
be771a83 GS |
936 | (S inplace) You requested an inplace edit without creating a backup |
937 | file. Perl was unable to remove the original file to replace it with | |
938 | the modified file. The file was left unmodified. | |
10f9c03d | 939 | |
a0d0e21e LW |
940 | =item Can't rename %s to %s: %s, skipping file |
941 | ||
e476b1b5 | 942 | (S inplace) The rename done by the B<-i> switch failed for some reason, |
10f9c03d | 943 | probably because you don't have write permission to the directory. |
a0d0e21e | 944 | |
748a9306 LW |
945 | =item Can't reopen input pipe (name: %s) in binary mode |
946 | ||
be771a83 GS |
947 | (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried |
948 | to reopen it to accept binary data. Alas, it failed. | |
748a9306 | 949 | |
6df41af2 GS |
950 | =item Can't resolve method `%s' overloading `%s' in package `%s' |
951 | ||
be771a83 GS |
952 | (F|P) Error resolving overloading specified by a method name (as opposed |
953 | to a subroutine reference): no such method callable via the package. If | |
954 | method name is C<???>, this is an internal error. | |
6df41af2 | 955 | |
a0d0e21e LW |
956 | =item Can't reswap uid and euid |
957 | ||
be771a83 GS |
958 | (P) The setreuid() call failed for some reason in the setuid emulator of |
959 | suidperl. | |
a0d0e21e | 960 | |
cd06dffe GS |
961 | =item Can't return %s from lvalue subroutine |
962 | ||
be771a83 GS |
963 | (F) Perl detected an attempt to return illegal lvalues (such as |
964 | temporary or readonly values) from a subroutine used as an lvalue. This | |
965 | is not allowed. | |
cd06dffe | 966 | |
78f9721b SM |
967 | =item Can't return %s to lvalue scalar context |
968 | ||
969 | (F) You tried to return a complete array or hash from an lvalue subroutine, | |
970 | but you called the subroutine in a way that made Perl think you meant | |
971 | to return only one value. You probably meant to write parentheses around | |
972 | the call to the subroutine, which tell Perl that the call should be in | |
973 | list context. | |
974 | ||
6df41af2 GS |
975 | =item Can't return outside a subroutine |
976 | ||
977 | (F) The return statement was executed in mainline code, that is, where | |
978 | there was no subroutine call to return out of. See L<perlsub>. | |
979 | ||
a0d0e21e LW |
980 | =item Can't stat script "%s" |
981 | ||
be771a83 GS |
982 | (P) For some reason you can't fstat() the script even though you have it |
983 | open already. Bizarre. | |
a0d0e21e LW |
984 | |
985 | =item Can't swap uid and euid | |
986 | ||
be771a83 GS |
987 | (P) The setreuid() call failed for some reason in the setuid emulator of |
988 | suidperl. | |
a0d0e21e LW |
989 | |
990 | =item Can't take log of %g | |
991 | ||
fb73857a | 992 | (F) For ordinary real numbers, you can't take the logarithm of a |
993 | negative number or zero. There's a Math::Complex package that comes | |
be771a83 GS |
994 | standard with Perl, though, if you really want to do that for the |
995 | negative numbers. | |
a0d0e21e LW |
996 | |
997 | =item Can't take sqrt of %g | |
998 | ||
999 | (F) For ordinary real numbers, you can't take the square root of a | |
fb73857a | 1000 | negative number. There's a Math::Complex package that comes standard |
1001 | with Perl, though, if you really want to do that. | |
a0d0e21e LW |
1002 | |
1003 | =item Can't undef active subroutine | |
1004 | ||
1005 | (F) You can't undefine a routine that's currently running. You can, | |
1006 | however, redefine it while it's running, and you can even undef the | |
1007 | redefined subroutine while the old routine is running. Go figure. | |
1008 | ||
1009 | =item Can't unshift | |
1010 | ||
1011 | (F) You tried to unshift an "unreal" array that can't be unshifted, such | |
1012 | as the main Perl stack. | |
1013 | ||
1014 | =item Can't upgrade that kind of scalar | |
1015 | ||
be771a83 GS |
1016 | (P) The internal sv_upgrade routine adds "members" to an SV, making it |
1017 | into a more specialized kind of SV. The top several SV types are so | |
1018 | specialized, however, that they cannot be interconverted. This message | |
1019 | indicates that such a conversion was attempted. | |
a0d0e21e LW |
1020 | |
1021 | =item Can't upgrade to undef | |
1022 | ||
be771a83 GS |
1023 | (P) The undefined SV is the bottom of the totem pole, in the scheme of |
1024 | upgradability. Upgrading to undef indicates an error in the code | |
1025 | calling sv_upgrade. | |
a0d0e21e | 1026 | |
6df41af2 GS |
1027 | =item Can't use an undefined value as %s reference |
1028 | ||
1029 | (F) A value used as either a hard reference or a symbolic reference must | |
1030 | be a defined value. This helps to delurk some insidious errors. | |
1031 | ||
1db89ea5 BS |
1032 | =item Can't use anonymous symbol table for method lookup |
1033 | ||
1034 | (P) The internal routine that does method lookup was handed a symbol | |
1035 | table that doesn't have a name. Symbol tables can become anonymous | |
1036 | for example by undefining stashes: C<undef %Some::Package::>. | |
1037 | ||
6df41af2 GS |
1038 | =item Can't use bareword ("%s") as %s ref while "strict refs" in use |
1039 | ||
be771a83 GS |
1040 | (F) Only hard references are allowed by "strict refs". Symbolic |
1041 | references are disallowed. See L<perlref>. | |
6df41af2 | 1042 | |
90b75b61 | 1043 | =item Can't use %! because Errno.pm is not available |
1d2dff63 GS |
1044 | |
1045 | (F) The first time the %! hash is used, perl automatically loads the | |
1046 | Errno.pm module. The Errno module is expected to tie the %! hash to | |
1047 | provide symbolic names for C<$!> errno values. | |
1048 | ||
6df41af2 GS |
1049 | =item Can't use %s for loop variable |
1050 | ||
be771a83 GS |
1051 | (F) Only a simple scalar variable may be used as a loop variable on a |
1052 | foreach. | |
6df41af2 GS |
1053 | |
1054 | =item Can't use global %s in "my" | |
1055 | ||
be771a83 GS |
1056 | (F) You tried to declare a magical variable as a lexical variable. This |
1057 | is not allowed, because the magic can be tied to only one location | |
1058 | (namely the global variable) and it would be incredibly confusing to | |
1059 | have variables in your program that looked like magical variables but | |
6df41af2 GS |
1060 | weren't. |
1061 | ||
c07a80fd | 1062 | =item Can't use "my %s" in sort comparison |
1063 | ||
1064 | (F) The global variables $a and $b are reserved for sort comparisons. | |
c47ff5f1 | 1065 | You mentioned $a or $b in the same line as the <=> or cmp operator, |
c07a80fd | 1066 | and the variable had earlier been declared as a lexical variable. |
1067 | Either qualify the sort variable with the package name, or rename the | |
1068 | lexical variable. | |
1069 | ||
a0d0e21e LW |
1070 | =item Can't use %s ref as %s ref |
1071 | ||
1072 | (F) You've mixed up your reference types. You have to dereference a | |
1073 | reference of the type needed. You can use the ref() function to | |
1074 | test the type of the reference, if need be. | |
1075 | ||
748a9306 | 1076 | =item Can't use string ("%s") as %s ref while "strict refs" in use |
a0d0e21e | 1077 | |
be771a83 GS |
1078 | (F) Only hard references are allowed by "strict refs". Symbolic |
1079 | references are disallowed. See L<perlref>. | |
a0d0e21e | 1080 | |
748a9306 LW |
1081 | =item Can't use subscript on %s |
1082 | ||
1083 | (F) The compiler tried to interpret a bracketed expression as a | |
1084 | subscript. But to the left of the brackets was an expression that | |
1085 | didn't look like an array reference, or anything else subscriptable. | |
1086 | ||
6df41af2 GS |
1087 | =item Can't use \%c to mean $%c in expression |
1088 | ||
75b44862 GS |
1089 | (W syntax) In an ordinary expression, backslash is a unary operator that |
1090 | creates a reference to its argument. The use of backslash to indicate a | |
1091 | backreference to a matched substring is valid only as part of a regular | |
be771a83 GS |
1092 | expression pattern. Trying to do this in ordinary Perl code produces a |
1093 | value that prints out looking like SCALAR(0xdecaf). Use the $1 form | |
1094 | instead. | |
6df41af2 | 1095 | |
810b8aa5 GS |
1096 | =item Can't weaken a nonreference |
1097 | ||
1098 | (F) You attempted to weaken something that was not a reference. Only | |
1099 | references can be weakened. | |
1100 | ||
5f05dabc | 1101 | =item Can't x= to read-only value |
a0d0e21e | 1102 | |
be771a83 GS |
1103 | (F) You tried to repeat a constant value (often the undefined value) |
1104 | with an assignment operator, which implies modifying the value itself. | |
a0d0e21e LW |
1105 | Perhaps you need to copy the value to a temporary, and repeat that. |
1106 | ||
ac7cd81a SC |
1107 | =item Character in "C" format wrapped |
1108 | ||
1109 | (W pack) You said | |
1110 | ||
1111 | pack("C", $x) | |
1112 | ||
1113 | where $x is either less than 0 or more than 255; the C<"C"> format is | |
1114 | only for encoding native operating system characters (ASCII, EBCDIC, | |
1115 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1116 | ||
1117 | pack("C", $x & 255) | |
1118 | ||
1119 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1120 | instead. | |
1121 | ||
1122 | =item Character in "c" format wrapped | |
1123 | ||
1124 | (W pack) You said | |
1125 | ||
1126 | pack("c", $x) | |
1127 | ||
1128 | where $x is either less than -128 or more than 127; the C<"c"> format | |
1129 | is only for encoding native operating system characters (ASCII, EBCDIC, | |
1130 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1131 | ||
1132 | pack("c", $x & 255); | |
1133 | ||
1134 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1135 | instead. | |
1136 | ||
9ddeeac9 | 1137 | =item close() on unopened filehandle %s |
a0d0e21e | 1138 | |
e476b1b5 | 1139 | (W unopened) You tried to close a filehandle that was never opened. |
a0d0e21e | 1140 | |
6df41af2 GS |
1141 | =item %s: Command not found |
1142 | ||
be771a83 GS |
1143 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1144 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 1145 | |
7a2e2cd6 | 1146 | =item Compilation failed in require |
1147 | ||
1148 | (F) Perl could not compile a file specified in a C<require> statement. | |
be771a83 GS |
1149 | Perl uses this generic message when none of the errors that it |
1150 | encountered were severe enough to halt compilation immediately. | |
7a2e2cd6 | 1151 | |
c3464db5 DD |
1152 | =item Complex regular subexpression recursion limit (%d) exceeded |
1153 | ||
be771a83 GS |
1154 | (W regexp) The regular expression engine uses recursion in complex |
1155 | situations where back-tracking is required. Recursion depth is limited | |
1156 | to 32766, or perhaps less in architectures where the stack cannot grow | |
1157 | arbitrarily. ("Simple" and "medium" situations are handled without | |
1158 | recursion and are not subject to a limit.) Try shortening the string | |
1159 | under examination; looping in Perl code (e.g. with C<while>) rather than | |
1160 | in the regular expression engine; or rewriting the regular expression so | |
c2e66d9e | 1161 | that it is simpler or backtracks less. (See L<perlfaq2> for information |
be771a83 | 1162 | on I<Mastering Regular Expressions>.) |
c3464db5 | 1163 | |
38875929 DM |
1164 | =item cond_broadcast() called on unlocked variable |
1165 | ||
1166 | (W threads) Within a thread-enabled program, you tried to call | |
1167 | cond_broadcast() on a variable which wasn't locked. The cond_broadcast() | |
1168 | function is used to wake up another thread that is waiting in a | |
1169 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1170 | has a chance to enter the wait, it is usual for the signaling thread to | |
1171 | first wait for a lock on variable. This lock attempt will only succeed | |
1172 | after the other thread has entered cond_wait() and thus relinquished the | |
1173 | lock. | |
1174 | ||
1175 | ||
1176 | =item cond_signal() called on unlocked variable | |
1177 | ||
1178 | (W threads) Within a thread-enabled program, you tried to call | |
1179 | cond_signal() on a variable which wasn't locked. The cond_signal() | |
1180 | function is used to wake up another thread that is waiting in a | |
1181 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1182 | has a chance to enter the wait, it is usual for the signaling thread to | |
1183 | first wait for a lock on variable. This lock attempt will only succeed | |
1184 | after the other thread has entered cond_wait() and thus relinquished the | |
1185 | lock. | |
1186 | ||
69282e91 | 1187 | =item connect() on closed socket %s |
a0d0e21e | 1188 | |
be771a83 GS |
1189 | (W closed) You tried to do a connect on a closed socket. Did you forget |
1190 | to check the return value of your socket() call? See | |
1191 | L<perlfunc/connect>. | |
a0d0e21e | 1192 | |
41ab332f | 1193 | =item Constant(%s)%s: %s |
6df41af2 | 1194 | |
be771a83 GS |
1195 | (F) The parser found inconsistencies either while attempting to define |
1196 | an overloaded constant, or when trying to find the character name | |
1197 | specified in the C<\N{...}> escape. Perhaps you forgot to load the | |
1198 | corresponding C<overload> or C<charnames> pragma? See L<charnames> and | |
1199 | L<overload>. | |
6df41af2 | 1200 | |
779c5bc9 GS |
1201 | =item Constant is not %s reference |
1202 | ||
1203 | (F) A constant value (perhaps declared using the C<use constant> pragma) | |
be771a83 GS |
1204 | is being dereferenced, but it amounts to the wrong type of reference. |
1205 | The message indicates the type of reference that was expected. This | |
1206 | usually indicates a syntax error in dereferencing the constant value. | |
779c5bc9 GS |
1207 | See L<perlsub/"Constant Functions"> and L<constant>. |
1208 | ||
4cee8e80 CS |
1209 | =item Constant subroutine %s redefined |
1210 | ||
bb028877 | 1211 | (S) You redefined a subroutine which had previously been |
be771a83 GS |
1212 | eligible for inlining. See L<perlsub/"Constant Functions"> for |
1213 | commentary and workarounds. | |
4cee8e80 | 1214 | |
9607fc9c | 1215 | =item Constant subroutine %s undefined |
1216 | ||
be771a83 GS |
1217 | (W misc) You undefined a subroutine which had previously been eligible |
1218 | for inlining. See L<perlsub/"Constant Functions"> for commentary and | |
1219 | workarounds. | |
9607fc9c | 1220 | |
e7ea3e70 IZ |
1221 | =item Copy method did not return a reference |
1222 | ||
64977eb6 | 1223 | (F) The method which overloads "=" is buggy. See |
13a2d996 | 1224 | L<overload/Copy Constructor>. |
e7ea3e70 | 1225 | |
6798c92b GS |
1226 | =item CORE::%s is not a keyword |
1227 | ||
1228 | (F) The CORE:: namespace is reserved for Perl keywords. | |
1229 | ||
a0d0e21e LW |
1230 | =item corrupted regexp pointers |
1231 | ||
1232 | (P) The regular expression engine got confused by what the regular | |
1233 | expression compiler gave it. | |
1234 | ||
1235 | =item corrupted regexp program | |
1236 | ||
be771a83 GS |
1237 | (P) The regular expression engine got passed a regexp program without a |
1238 | valid magic number. | |
a0d0e21e | 1239 | |
6df41af2 GS |
1240 | =item Corrupt malloc ptr 0x%lx at 0x%lx |
1241 | ||
1242 | (P) The malloc package that comes with Perl had an internal failure. | |
1243 | ||
1244 | =item C<-p> destination: %s | |
1245 | ||
1246 | (F) An error occurred during the implicit output invoked by the C<-p> | |
1247 | command-line switch. (This output goes to STDOUT unless you've | |
1248 | redirected it with select().) | |
1249 | ||
1250 | =item C<-T> and C<-B> not implemented on filehandles | |
1251 | ||
1252 | (F) Perl can't peek at the stdio buffer of filehandles when it doesn't | |
1253 | know about your kind of stdio. You'll have to use a filename instead. | |
1254 | ||
a0d0e21e LW |
1255 | =item Deep recursion on subroutine "%s" |
1256 | ||
be771a83 GS |
1257 | (W recursion) This subroutine has called itself (directly or indirectly) |
1258 | 100 times more than it has returned. This probably indicates an | |
1259 | infinite recursion, unless you're writing strange benchmark programs, in | |
1260 | which case it indicates something else. | |
a0d0e21e | 1261 | |
f10b0346 | 1262 | =item defined(@array) is deprecated |
69794302 | 1263 | |
be771a83 GS |
1264 | (D deprecated) defined() is not usually useful on arrays because it |
1265 | checks for an undefined I<scalar> value. If you want to see if the | |
64977eb6 | 1266 | array is empty, just use C<if (@array) { # not empty }> for example. |
69794302 | 1267 | |
f10b0346 | 1268 | =item defined(%hash) is deprecated |
69794302 | 1269 | |
be771a83 GS |
1270 | (D deprecated) defined() is not usually useful on hashes because it |
1271 | checks for an undefined I<scalar> value. If you want to see if the hash | |
64977eb6 | 1272 | is empty, just use C<if (%hash) { # not empty }> for example. |
69794302 | 1273 | |
62658f4d PM |
1274 | =item %s defines neither package nor VERSION--version check failed |
1275 | ||
1276 | (F) You said something like "use Module 42" but in the Module file | |
1277 | there are neither package declarations nor a C<$VERSION>. | |
1278 | ||
fc36a67e | 1279 | =item Delimiter for here document is too long |
1280 | ||
be771a83 GS |
1281 | (F) In a here document construct like C<<<FOO>, the label C<FOO> is too |
1282 | long for Perl to handle. You have to be seriously twisted to write code | |
1283 | that triggers this error. | |
fc36a67e | 1284 | |
3cdd684c TP |
1285 | =item Did not produce a valid header |
1286 | ||
1287 | See Server error. | |
1288 | ||
6df41af2 GS |
1289 | =item %s did not return a true value |
1290 | ||
1291 | (F) A required (or used) file must return a true value to indicate that | |
1292 | it compiled correctly and ran its initialization code correctly. It's | |
1293 | traditional to end such a file with a "1;", though any true value would | |
1294 | do. See L<perlfunc/require>. | |
1295 | ||
cc507455 | 1296 | =item (Did you mean &%s instead?) |
4633a7c4 | 1297 | |
be771a83 GS |
1298 | (W) You probably referred to an imported subroutine &FOO as $FOO or some |
1299 | such. | |
4633a7c4 | 1300 | |
cc507455 | 1301 | =item (Did you mean "local" instead of "our"?) |
33633739 | 1302 | |
be771a83 GS |
1303 | (W misc) Remember that "our" does not localize the declared global |
1304 | variable. You have declared it again in the same lexical scope, which | |
1305 | seems superfluous. | |
33633739 | 1306 | |
cc507455 | 1307 | =item (Did you mean $ or @ instead of %?) |
a0d0e21e | 1308 | |
be771a83 GS |
1309 | (W) You probably said %hash{$key} when you meant $hash{$key} or |
1310 | @hash{@keys}. On the other hand, maybe you just meant %hash and got | |
1311 | carried away. | |
748a9306 | 1312 | |
7e1af8bc | 1313 | =item Died |
5f05dabc | 1314 | |
1315 | (F) You passed die() an empty string (the equivalent of C<die "">) or | |
1316 | you called it with no args and both C<$@> and C<$_> were empty. | |
1317 | ||
3cdd684c TP |
1318 | =item Document contains no data |
1319 | ||
1320 | See Server error. | |
1321 | ||
62658f4d PM |
1322 | =item %s does not define %s::VERSION--version check failed |
1323 | ||
1324 | (F) You said something like "use Module 42" but the Module did not | |
1325 | define a C<$VERSION.> | |
1326 | ||
a0d0e21e LW |
1327 | =item Don't know how to handle magic of type '%s' |
1328 | ||
1329 | (P) The internal handling of magical variables has been cursed. | |
1330 | ||
1331 | =item do_study: out of memory | |
1332 | ||
1333 | (P) This should have been caught by safemalloc() instead. | |
1334 | ||
6df41af2 GS |
1335 | =item (Do you need to predeclare %s?) |
1336 | ||
1337 | (S) This is an educated guess made in conjunction with the message "%s | |
1338 | found where operator expected". It often means a subroutine or module | |
1339 | name is being referenced that hasn't been declared yet. This may be | |
1340 | because of ordering problems in your file, or because of a missing | |
be771a83 GS |
1341 | "sub", "package", "require", or "use" statement. If you're referencing |
1342 | something that isn't defined yet, you don't actually have to define the | |
1343 | subroutine or package before the current location. You can use an empty | |
1344 | "sub foo;" or "package FOO;" to enter a "forward" declaration. | |
6df41af2 | 1345 | |
ac206dc8 RGS |
1346 | =item dump() better written as CORE::dump() |
1347 | ||
1348 | (W misc) You used the obsolescent C<dump()> built-in function, without fully | |
1349 | qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>. | |
1350 | ||
a0d0e21e LW |
1351 | =item Duplicate free() ignored |
1352 | ||
be771a83 GS |
1353 | (S malloc) An internal routine called free() on something that had |
1354 | already been freed. | |
a0d0e21e | 1355 | |
4633a7c4 LW |
1356 | =item elseif should be elsif |
1357 | ||
be771a83 GS |
1358 | (S) There is no keyword "elseif" in Perl because Larry thinks it's ugly. |
1359 | Your code will be interpreted as an attempt to call a method named | |
1360 | "elseif" for the class returned by the following block. This is | |
4633a7c4 LW |
1361 | unlikely to be what you want. |
1362 | ||
ab13f0c7 JH |
1363 | =item Empty %s |
1364 | ||
af6f566e HS |
1365 | (F) C<\p> and C<\P> are used to introduce a named Unicode property, as |
1366 | described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in | |
1367 | a regular expression without specifying the property name. | |
ab13f0c7 | 1368 | |
85ab1d1d | 1369 | =item entering effective %s failed |
5ff3f7a4 | 1370 | |
85ab1d1d | 1371 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
1372 | effective uids or gids failed. |
1373 | ||
748a9306 LW |
1374 | =item Error converting file specification %s |
1375 | ||
5f05dabc | 1376 | (F) An error peculiar to VMS. Because Perl may have to deal with file |
748a9306 | 1377 | specifications in either VMS or Unix syntax, it converts them to a |
be771a83 GS |
1378 | single form when it must operate on them directly. Either you've passed |
1379 | an invalid file specification to Perl, or you've found a case the | |
1380 | conversion routines don't handle. Drat. | |
748a9306 | 1381 | |
e4d48cc9 GS |
1382 | =item %s: Eval-group in insecure regular expression |
1383 | ||
be771a83 GS |
1384 | (F) Perl detected tainted data when trying to compile a regular |
1385 | expression that contains the C<(?{ ... })> zero-width assertion, which | |
1386 | is unsafe. See L<perlre/(?{ code })>, and L<perlsec>. | |
e4d48cc9 | 1387 | |
e4d48cc9 GS |
1388 | =item %s: Eval-group not allowed at run time |
1389 | ||
be771a83 GS |
1390 | (F) Perl tried to compile a regular expression containing the |
1391 | C<(?{ ... })> zero-width assertion at run time, as it would when the | |
1392 | pattern contains interpolated values. Since that is a security risk, it | |
1393 | is not allowed. If you insist, you may still do this by explicitly | |
1394 | building the pattern from an interpolated string at run time and using | |
1395 | that in an eval(). See L<perlre/(?{ code })>. | |
e4d48cc9 | 1396 | |
6df41af2 GS |
1397 | =item %s: Eval-group not allowed, use re 'eval' |
1398 | ||
be771a83 GS |
1399 | (F) A regular expression contained the C<(?{ ... })> zero-width |
1400 | assertion, but that construct is only allowed when the C<use re 'eval'> | |
1401 | pragma is in effect. See L<perlre/(?{ code })>. | |
6df41af2 | 1402 | |
fc36a67e | 1403 | =item Excessively long <> operator |
1404 | ||
1405 | (F) The contents of a <> operator may not exceed the maximum size of a | |
1406 | Perl identifier. If you're just trying to glob a long list of | |
1407 | filenames, try using the glob() operator, or put the filenames into a | |
1408 | variable and glob that. | |
1409 | ||
ed9aa3b7 SG |
1410 | =item exec? I'm not *that* kind of operating system |
1411 | ||
1412 | (F) The C<exec> function is not implemented in MacPerl. See L<perlport>. | |
1413 | ||
f86702cc | 1414 | =item Execution of %s aborted due to compilation errors |
a0d0e21e LW |
1415 | |
1416 | (F) The final summary message when a Perl compilation fails. | |
1417 | ||
1418 | =item Exiting eval via %s | |
1419 | ||
be771a83 GS |
1420 | (W exiting) You are exiting an eval by unconventional means, such as a |
1421 | goto, or a loop control statement. | |
e476b1b5 GS |
1422 | |
1423 | =item Exiting format via %s | |
1424 | ||
9a2ff54b | 1425 | (W exiting) You are exiting a format by unconventional means, such as a |
be771a83 | 1426 | goto, or a loop control statement. |
a0d0e21e | 1427 | |
0a753a76 | 1428 | =item Exiting pseudo-block via %s |
1429 | ||
be771a83 GS |
1430 | (W exiting) You are exiting a rather special block construct (like a |
1431 | sort block or subroutine) by unconventional means, such as a goto, or a | |
1432 | loop control statement. See L<perlfunc/sort>. | |
0a753a76 | 1433 | |
a0d0e21e LW |
1434 | =item Exiting subroutine via %s |
1435 | ||
be771a83 GS |
1436 | (W exiting) You are exiting a subroutine by unconventional means, such |
1437 | as a goto, or a loop control statement. | |
a0d0e21e LW |
1438 | |
1439 | =item Exiting substitution via %s | |
1440 | ||
be771a83 GS |
1441 | (W exiting) You are exiting a substitution by unconventional means, such |
1442 | as a return, a goto, or a loop control statement. | |
a0d0e21e | 1443 | |
7b8d334a GS |
1444 | =item Explicit blessing to '' (assuming package main) |
1445 | ||
be771a83 GS |
1446 | (W misc) You are blessing a reference to a zero length string. This has |
1447 | the effect of blessing the reference into the package main. This is | |
1448 | usually not what you want. Consider providing a default target package, | |
1449 | e.g. bless($ref, $p || 'MyPackage'); | |
7b8d334a | 1450 | |
6df41af2 GS |
1451 | =item %s: Expression syntax |
1452 | ||
be771a83 GS |
1453 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1454 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 GS |
1455 | |
1456 | =item %s failed--call queue aborted | |
1457 | ||
1458 | (F) An untrapped exception was raised while executing a CHECK, INIT, or | |
1459 | END subroutine. Processing of the remainder of the queue of such | |
1460 | routines has been prematurely ended. | |
1461 | ||
7253e4e3 | 1462 | =item False [] range "%s" in regex; marked by <-- HERE in m/%s/ |
73b437c8 | 1463 | |
be771a83 | 1464 | (W regexp) A character class range must start and end at a literal |
7253e4e3 RK |
1465 | character, not another character class like C<\d> or C<[:alpha:]>. The "-" |
1466 | in your false range is interpreted as a literal "-". Consider quoting the | |
1467 | "-", "\-". The <-- HERE shows in the regular expression about where the | |
1468 | problem was discovered. See L<perlre>. | |
73b437c8 | 1469 | |
748a9306 | 1470 | =item Fatal VMS error at %s, line %d |
a0d0e21e | 1471 | |
be771a83 GS |
1472 | (P) An error peculiar to VMS. Something untoward happened in a VMS |
1473 | system service or RTL routine; Perl's exit status should provide more | |
1474 | details. The filename in "at %s" and the line number in "line %d" tell | |
1475 | you which section of the Perl source code is distressed. | |
a0d0e21e LW |
1476 | |
1477 | =item fcntl is not implemented | |
1478 | ||
1479 | (F) Your machine apparently doesn't implement fcntl(). What is this, a | |
1480 | PDP-11 or something? | |
1481 | ||
af8c498a | 1482 | =item Filehandle %s opened only for input |
a0d0e21e | 1483 | |
be771a83 GS |
1484 | (W io) You tried to write on a read-only filehandle. If you intended it |
1485 | to be a read-write filehandle, you needed to open it with "+<" or "+>" | |
1486 | or "+>>" instead of with "<" or nothing. If you intended only to write | |
1487 | the file, use ">" or ">>". See L<perlfunc/open>. | |
a0d0e21e | 1488 | |
af8c498a | 1489 | =item Filehandle %s opened only for output |
a0d0e21e | 1490 | |
2a6fd447 NIS |
1491 | (W io) You tried to read from a filehandle opened only for writing. |
1492 | If you intended it to be a read/write filehandle, you needed to open it | |
be771a83 GS |
1493 | with "+<" or "+>" or "+>>" instead of with "<" or nothing. If you |
1494 | intended only to read from the file, use "<". See L<perlfunc/open>. | |
97828cef RGS |
1495 | |
1496 | =item Filehandle %s reopened as %s only for input | |
1497 | ||
1498 | (W io) You opened for reading a filehandle that got the same filehandle id | |
1499 | as STDOUT or STDERR. This occured because you closed STDOUT or STDERR | |
1500 | previously. | |
1501 | ||
1502 | =item Filehandle STDIN reopened as %s only for output | |
1503 | ||
1504 | (W io) You opened for writing a filehandle that got the same filehandle id | |
1505 | as STDIN. This occured because you closed STDIN previously. | |
a0d0e21e LW |
1506 | |
1507 | =item Final $ should be \$ or $name | |
1508 | ||
1509 | (F) You must now decide whether the final $ in a string was meant to be | |
be771a83 GS |
1510 | a literal dollar sign, or was meant to introduce a variable name that |
1511 | happens to be missing. So you have to put either the backslash or the | |
1512 | name. | |
a0d0e21e LW |
1513 | |
1514 | =item Final @ should be \@ or @name | |
1515 | ||
1516 | (F) You must now decide whether the final @ in a string was meant to be | |
be771a83 GS |
1517 | a literal "at" sign, or was meant to introduce a variable name that |
1518 | happens to be missing. So you have to put either the backslash or the | |
1519 | name. | |
a0d0e21e | 1520 | |
56e90b21 GS |
1521 | =item flock() on closed filehandle %s |
1522 | ||
be771a83 | 1523 | (W closed) The filehandle you're attempting to flock() got itself closed |
c289d2f7 | 1524 | some time before now. Check your control flow. flock() operates on |
be771a83 GS |
1525 | filehandles. Are you attempting to call flock() on a dirhandle by the |
1526 | same name? | |
56e90b21 | 1527 | |
5cd5c422 RB |
1528 | =item Quantifier follows nothing in regex; |
1529 | ||
1530 | marked by <-- HERE in m/%s/ | |
6df41af2 | 1531 | |
b45f050a | 1532 | (F) You started a regular expression with a quantifier. Backslash it if you |
7253e4e3 RK |
1533 | meant it literally. The <-- HERE shows in the regular expression about |
1534 | where the problem was discovered. See L<perlre>. | |
6df41af2 GS |
1535 | |
1536 | =item Format not terminated | |
1537 | ||
1538 | (F) A format must be terminated by a line with a solitary dot. Perl got | |
1539 | to the end of your file without finding such a line. | |
1540 | ||
a0d0e21e LW |
1541 | =item Format %s redefined |
1542 | ||
e476b1b5 | 1543 | (W redefine) You redefined a format. To suppress this warning, say |
a0d0e21e LW |
1544 | |
1545 | { | |
271595cc | 1546 | no warnings 'redefine'; |
a0d0e21e LW |
1547 | eval "format NAME =..."; |
1548 | } | |
1549 | ||
a0d0e21e LW |
1550 | =item Found = in conditional, should be == |
1551 | ||
e476b1b5 | 1552 | (W syntax) You said |
a0d0e21e LW |
1553 | |
1554 | if ($foo = 123) | |
1555 | ||
1556 | when you meant | |
1557 | ||
1558 | if ($foo == 123) | |
1559 | ||
1560 | (or something like that). | |
1561 | ||
6df41af2 GS |
1562 | =item %s found where operator expected |
1563 | ||
1564 | (S) The Perl lexer knows whether to expect a term or an operator. If it | |
be771a83 GS |
1565 | sees what it knows to be a term when it was expecting to see an |
1566 | operator, it gives you this warning. Usually it indicates that an | |
1567 | operator or delimiter was omitted, such as a semicolon. | |
6df41af2 | 1568 | |
a0d0e21e LW |
1569 | =item gdbm store returned %d, errno %d, key "%s" |
1570 | ||
1571 | (S) A warning from the GDBM_File extension that a store failed. | |
1572 | ||
1573 | =item gethostent not implemented | |
1574 | ||
1575 | (F) Your C library apparently doesn't implement gethostent(), probably | |
1576 | because if it did, it'd feel morally obligated to return every hostname | |
1577 | on the Internet. | |
1578 | ||
69282e91 | 1579 | =item get%sname() on closed socket %s |
a0d0e21e | 1580 | |
be771a83 GS |
1581 | (W closed) You tried to get a socket or peer socket name on a closed |
1582 | socket. Did you forget to check the return value of your socket() call? | |
a0d0e21e | 1583 | |
748a9306 LW |
1584 | =item getpwnam returned invalid UIC %#o for user "%s" |
1585 | ||
1586 | (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the | |
1587 | C<getpwnam> operator returned an invalid UIC. | |
1588 | ||
6df41af2 GS |
1589 | =item getsockopt() on closed socket %s |
1590 | ||
be771a83 GS |
1591 | (W closed) You tried to get a socket option on a closed socket. Did you |
1592 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
1593 | L<perlfunc/getsockopt>. |
1594 | ||
1595 | =item Global symbol "%s" requires explicit package name | |
1596 | ||
1597 | (F) You've said "use strict vars", which indicates that all variables | |
1598 | must either be lexically scoped (using "my"), declared beforehand using | |
1599 | "our", or explicitly qualified to say which package the global variable | |
1600 | is in (using "::"). | |
1601 | ||
e476b1b5 GS |
1602 | =item glob failed (%s) |
1603 | ||
be771a83 GS |
1604 | (W glob) Something went wrong with the external program(s) used for |
1605 | C<glob> and C<< <*.c> >>. Usually, this means that you supplied a | |
1606 | C<glob> pattern that caused the external program to fail and exit with a | |
1607 | nonzero status. If the message indicates that the abnormal exit | |
1608 | resulted in a coredump, this may also mean that your csh (C shell) is | |
1609 | broken. If so, you should change all of the csh-related variables in | |
1610 | config.sh: If you have tcsh, make the variables refer to it as if it | |
1611 | were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all | |
1612 | empty (except that C<d_csh> should be C<'undef'>) so that Perl will | |
1613 | think csh is missing. In either case, after editing config.sh, run | |
75b44862 | 1614 | C<./Configure -S> and rebuild Perl. |
e476b1b5 | 1615 | |
a0d0e21e LW |
1616 | =item Glob not terminated |
1617 | ||
1618 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
be771a83 GS |
1619 | a term, so it's looking for the corresponding right angle bracket, and |
1620 | not finding it. Chances are you left some needed parentheses out | |
1621 | earlier in the line, and you really meant a "less than". | |
a0d0e21e | 1622 | |
6df41af2 | 1623 | =item Got an error from DosAllocMem |
a0d0e21e | 1624 | |
6df41af2 GS |
1625 | (P) An error peculiar to OS/2. Most probably you're using an obsolete |
1626 | version of Perl, and this should not happen anyway. | |
a0d0e21e LW |
1627 | |
1628 | =item goto must have label | |
1629 | ||
1630 | (F) Unlike with "next" or "last", you're not allowed to goto an | |
1631 | unspecified destination. See L<perlfunc/goto>. | |
1632 | ||
18529408 IZ |
1633 | =item %s-group starts with a count |
1634 | ||
1635 | (F) In pack/unpack a ()-group started with a count. A count is | |
1636 | supposed to follow something: a template character or a ()-group. | |
1637 | ||
6df41af2 GS |
1638 | =item %s had compilation errors |
1639 | ||
1640 | (F) The final summary message when a C<perl -c> fails. | |
1641 | ||
a0d0e21e LW |
1642 | =item Had to create %s unexpectedly |
1643 | ||
be771a83 GS |
1644 | (S internal) A routine asked for a symbol from a symbol table that ought |
1645 | to have existed already, but for some reason it didn't, and had to be | |
1646 | created on an emergency basis to prevent a core dump. | |
a0d0e21e LW |
1647 | |
1648 | =item Hash %%s missing the % in argument %d of %s() | |
1649 | ||
be771a83 GS |
1650 | (D deprecated) Really old Perl let you omit the % on hash names in some |
1651 | spots. This is now heavily deprecated. | |
a0d0e21e | 1652 | |
6df41af2 GS |
1653 | =item %s has too many errors |
1654 | ||
1655 | (F) The parser has given up trying to parse the program after 10 errors. | |
1656 | Further error messages would likely be uninformative. | |
1657 | ||
252aa082 JH |
1658 | =item Hexadecimal number > 0xffffffff non-portable |
1659 | ||
e476b1b5 | 1660 | (W portable) The hexadecimal number you specified is larger than 2**32-1 |
9e24b6e2 JH |
1661 | (4294967295) and therefore non-portable between systems. See |
1662 | L<perlport> for more on portability concerns. | |
252aa082 | 1663 | |
8903cb82 | 1664 | =item Identifier too long |
1665 | ||
1666 | (F) Perl limits identifiers (names for variables, functions, etc.) to | |
fc36a67e | 1667 | about 250 characters for simple names, and somewhat more for compound |
be771a83 GS |
1668 | names (like C<$A::B>). You've exceeded Perl's limits. Future versions |
1669 | of Perl are likely to eliminate these arbitrary limitations. | |
8903cb82 | 1670 | |
6df41af2 | 1671 | =item Illegal binary digit %s |
f675dbe5 | 1672 | |
6df41af2 | 1673 | (F) You used a digit other than 0 or 1 in a binary number. |
f675dbe5 | 1674 | |
6df41af2 | 1675 | =item Illegal binary digit %s ignored |
a0d0e21e | 1676 | |
be771a83 GS |
1677 | (W digit) You may have tried to use a digit other than 0 or 1 in a |
1678 | binary number. Interpretation of the binary number stopped before the | |
1679 | offending digit. | |
a0d0e21e | 1680 | |
4fdae800 | 1681 | =item Illegal character %s (carriage return) |
1682 | ||
d5898338 | 1683 | (F) Perl normally treats carriage returns in the program text as it |
be771a83 GS |
1684 | would any other whitespace, which means you should never see this error |
1685 | when Perl was built using standard options. For some reason, your | |
1686 | version of Perl appears to have been built without this support. Talk | |
1687 | to your Perl administrator. | |
4fdae800 | 1688 | |
d37a9538 ST |
1689 | =item Illegal character in prototype for %s : %s |
1690 | ||
420cdfc1 | 1691 | (W syntax) An illegal character was found in a prototype declaration. Legal |
d37a9538 ST |
1692 | characters in prototypes are $, @, %, *, ;, [, ], &, and \. |
1693 | ||
a0d0e21e LW |
1694 | =item Illegal division by zero |
1695 | ||
be771a83 GS |
1696 | (F) You tried to divide a number by 0. Either something was wrong in |
1697 | your logic, or you need to put a conditional in to guard against | |
1698 | meaningless input. | |
a0d0e21e | 1699 | |
6df41af2 GS |
1700 | =item Illegal hexadecimal digit %s ignored |
1701 | ||
be771a83 GS |
1702 | (W digit) You may have tried to use a character other than 0 - 9 or |
1703 | A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal | |
1704 | number stopped before the illegal character. | |
6df41af2 | 1705 | |
a0d0e21e LW |
1706 | =item Illegal modulus zero |
1707 | ||
be771a83 GS |
1708 | (F) You tried to divide a number by 0 to get the remainder. Most |
1709 | numbers don't take to this kindly. | |
a0d0e21e | 1710 | |
6df41af2 | 1711 | =item Illegal number of bits in vec |
399388f4 | 1712 | |
6df41af2 GS |
1713 | (F) The number of bits in vec() (the third argument) must be a power of |
1714 | two from 1 to 32 (or 64, if your platform supports that). | |
399388f4 GS |
1715 | |
1716 | =item Illegal octal digit %s | |
a0d0e21e | 1717 | |
d1be9408 | 1718 | (F) You used an 8 or 9 in an octal number. |
a0d0e21e | 1719 | |
399388f4 | 1720 | =item Illegal octal digit %s ignored |
748a9306 | 1721 | |
d1be9408 | 1722 | (W digit) You may have tried to use an 8 or 9 in an octal number. |
75b44862 | 1723 | Interpretation of the octal number stopped before the 8 or 9. |
748a9306 | 1724 | |
6df41af2 | 1725 | =item Illegal switch in PERL5OPT: %s |
6ff81951 | 1726 | |
6df41af2 | 1727 | (X) The PERL5OPT environment variable may only be used to set the |
1c4db469 | 1728 | following switches: B<-[DIMUdmtw]>. |
6ff81951 | 1729 | |
6df41af2 | 1730 | =item Ill-formed CRTL environ value "%s" |
81e118e0 | 1731 | |
75b44862 | 1732 | (W internal) A warning peculiar to VMS. Perl tried to read the CRTL's |
be771a83 GS |
1733 | internal environ array, and encountered an element without the C<=> |
1734 | delimiter used to separate keys from values. The element is ignored. | |
09bef843 | 1735 | |
6df41af2 | 1736 | =item Ill-formed message in prime_env_iter: |%s| |
54310121 | 1737 | |
be771a83 GS |
1738 | (W internal) A warning peculiar to VMS. Perl tried to read a logical |
1739 | name or CLI symbol definition when preparing to iterate over %ENV, and | |
1740 | didn't see the expected delimiter between key and value, so the line was | |
1741 | ignored. | |
54310121 | 1742 | |
6df41af2 | 1743 | =item (in cleanup) %s |
9607fc9c | 1744 | |
be771a83 GS |
1745 | (W misc) This prefix usually indicates that a DESTROY() method raised |
1746 | the indicated exception. Since destructors are usually called by the | |
1747 | system at arbitrary points during execution, and often a vast number of | |
1748 | times, the warning is issued only once for any number of failures that | |
1749 | would otherwise result in the same message being repeated. | |
6df41af2 | 1750 | |
be771a83 GS |
1751 | Failure of user callbacks dispatched using the C<G_KEEPERR> flag could |
1752 | also result in this warning. See L<perlcall/G_KEEPERR>. | |
9607fc9c | 1753 | |
979699d9 JH |
1754 | =item In EBCDIC the v-string components cannot exceed 2147483647 |
1755 | ||
1756 | (F) An error peculiar to EBCDIC. Internally, v-strings are stored as | |
1757 | Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC | |
1758 | encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF). | |
1759 | ||
a0d0e21e LW |
1760 | =item Insecure dependency in %s |
1761 | ||
8b1a09fc | 1762 | (F) You tried to do something that the tainting mechanism didn't like. |
be771a83 GS |
1763 | The tainting mechanism is turned on when you're running setuid or |
1764 | setgid, or when you specify B<-T> to turn it on explicitly. The | |
1765 | tainting mechanism labels all data that's derived directly or indirectly | |
1766 | from the user, who is considered to be unworthy of your trust. If any | |
1767 | such data is used in a "dangerous" operation, you get this error. See | |
1768 | L<perlsec> for more information. | |
a0d0e21e LW |
1769 | |
1770 | =item Insecure directory in %s | |
1771 | ||
be771a83 GS |
1772 | (F) You can't use system(), exec(), or a piped open in a setuid or |
1773 | setgid script if C<$ENV{PATH}> contains a directory that is writable by | |
1774 | the world. See L<perlsec>. | |
a0d0e21e | 1775 | |
62f468fc | 1776 | =item Insecure $ENV{%s} while running %s |
a0d0e21e LW |
1777 | |
1778 | (F) You can't use system(), exec(), or a piped open in a setuid or | |
62f468fc MG |
1779 | setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>, |
1780 | C<$ENV{ENV}> or C<$ENV{BASH_ENV}> are derived from data supplied (or | |
a0d0e21e LW |
1781 | potentially supplied) by the user. The script must set the path to a |
1782 | known value, using trustworthy data. See L<perlsec>. | |
1783 | ||
a7ae9550 GS |
1784 | =item Integer overflow in %s number |
1785 | ||
75b44862 | 1786 | (W overflow) The hexadecimal, octal or binary number you have specified |
be771a83 GS |
1787 | either as a literal or as an argument to hex() or oct() is too big for |
1788 | your architecture, and has been converted to a floating point number. | |
1789 | On a 32-bit architecture the largest hexadecimal, octal or binary number | |
9e24b6e2 JH |
1790 | representable without overflow is 0xFFFFFFFF, 037777777777, or |
1791 | 0b11111111111111111111111111111111 respectively. Note that Perl | |
1792 | transparently promotes all numbers to a floating point representation | |
1793 | internally--subject to loss of precision errors in subsequent | |
1794 | operations. | |
bbce6d69 | 1795 | |
7253e4e3 | 1796 | =item Internal disaster in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
1797 | |
1798 | (P) Something went badly wrong in the regular expression parser. | |
7253e4e3 | 1799 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a JF |
1800 | discovered. |
1801 | ||
748a9306 LW |
1802 | =item Internal inconsistency in tracking vforks |
1803 | ||
be771a83 GS |
1804 | (S) A warning peculiar to VMS. Perl keeps track of the number of times |
1805 | you've called C<fork> and C<exec>, to determine whether the current call | |
1806 | to C<exec> should affect the current script or a subprocess (see | |
1807 | L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so | |
1808 | Perl is making a guess and treating this C<exec> as a request to | |
1809 | terminate the Perl script and execute the specified command. | |
748a9306 | 1810 | |
7253e4e3 | 1811 | =item Internal urp in regex; marked by <-- HERE in m/%s/ |
b45f050a | 1812 | |
7253e4e3 RK |
1813 | (P) Something went badly awry in the regular expression parser. The |
1814 | <-- HERE shows in the regular expression about where the problem was | |
1815 | discovered. | |
a0d0e21e | 1816 | |
6df41af2 GS |
1817 | =item %s (...) interpreted as function |
1818 | ||
75b44862 | 1819 | (W syntax) You've run afoul of the rule that says that any list operator |
be771a83 | 1820 | followed by parentheses turns into a function, with all the list |
64977eb6 | 1821 | operators arguments found inside the parentheses. See |
13a2d996 | 1822 | L<perlop/Terms and List Operators (Leftward)>. |
6df41af2 | 1823 | |
09bef843 SB |
1824 | =item Invalid %s attribute: %s |
1825 | ||
1826 | The indicated attribute for a subroutine or variable was not recognized | |
1827 | by Perl or by a user-supplied handler. See L<attributes>. | |
1828 | ||
1829 | =item Invalid %s attributes: %s | |
1830 | ||
be771a83 GS |
1831 | The indicated attributes for a subroutine or variable were not |
1832 | recognized by Perl or by a user-supplied handler. See L<attributes>. | |
09bef843 | 1833 | |
c635e13b | 1834 | =item Invalid conversion in %s: "%s" |
1835 | ||
be771a83 GS |
1836 | (W printf) Perl does not understand the given format conversion. See |
1837 | L<perlfunc/sprintf>. | |
c635e13b | 1838 | |
7253e4e3 | 1839 | =item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/ |
6df41af2 GS |
1840 | |
1841 | (F) The range specified in a character class had a minimum character | |
7253e4e3 RK |
1842 | greater than the maximum character. One possibility is that you forgot the |
1843 | C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only | |
1844 | up to C<ff>. The <-- HERE shows in the regular expression about where the | |
1845 | problem was discovered. See L<perlre>. | |
6df41af2 | 1846 | |
d1573ac7 | 1847 | =item Invalid range "%s" in transliteration operator |
c2e66d9e GS |
1848 | |
1849 | (F) The range specified in the tr/// or y/// operator had a minimum | |
1850 | character greater than the maximum character. See L<perlop>. | |
1851 | ||
09bef843 SB |
1852 | =item Invalid separator character %s in attribute list |
1853 | ||
0120eecf | 1854 | (F) Something other than a colon or whitespace was seen between the |
be771a83 GS |
1855 | elements of an attribute list. If the previous attribute had a |
1856 | parenthesised parameter list, perhaps that list was terminated too soon. | |
1857 | See L<attributes>. | |
09bef843 | 1858 | |
96e4d5b1 | 1859 | =item Invalid type in pack: '%s' |
1860 | ||
8903cb82 | 1861 | (F) The given character is not a valid pack type. See L<perlfunc/pack>. |
be771a83 GS |
1862 | (W pack) The given character is not a valid pack type but used to be |
1863 | silently ignored. | |
96e4d5b1 | 1864 | |
1865 | =item Invalid type in unpack: '%s' | |
1866 | ||
be771a83 GS |
1867 | (F) The given character is not a valid unpack type. See |
1868 | L<perlfunc/unpack>. | |
75b44862 GS |
1869 | (W unpack) The given character is not a valid unpack type but used to be |
1870 | silently ignored. | |
96e4d5b1 | 1871 | |
a0d0e21e LW |
1872 | =item ioctl is not implemented |
1873 | ||
1874 | (F) Your machine apparently doesn't implement ioctl(), which is pretty | |
1875 | strange for a machine that supports C. | |
1876 | ||
c289d2f7 JH |
1877 | =item ioctl() on unopened %s |
1878 | ||
1879 | (W unopened) You tried ioctl() on a filehandle that was never opened. | |
1880 | Check you control flow and number of arguments. | |
1881 | ||
80cbd5ad JH |
1882 | =item IO::Socket::atmark not implemented on this architecture |
1883 | ||
1884 | (F) Your machine doesn't implement the sockatmark() functionality, | |
1885 | neither as a system call or an ioctl call (SIOCATMARK). | |
1886 | ||
6ad11d81 JH |
1887 | =item `%s' is not a code reference |
1888 | ||
04a80ee0 RGS |
1889 | (W overload) The second (fourth, sixth, ...) argument of overload::constant |
1890 | needs to be a code reference. Either an anonymous subroutine, or a reference | |
6ad11d81 JH |
1891 | to a subroutine. |
1892 | ||
1893 | =item `%s' is not an overloadable type | |
1894 | ||
04a80ee0 RGS |
1895 | (W overload) You tried to overload a constant type the overload package is |
1896 | unaware of. | |
6ad11d81 | 1897 | |
a0d0e21e LW |
1898 | =item junk on end of regexp |
1899 | ||
1900 | (P) The regular expression parser is confused. | |
1901 | ||
1902 | =item Label not found for "last %s" | |
1903 | ||
be771a83 GS |
1904 | (F) You named a loop to break out of, but you're not currently in a loop |
1905 | of that name, not even if you count where you were called from. See | |
1906 | L<perlfunc/last>. | |
a0d0e21e LW |
1907 | |
1908 | =item Label not found for "next %s" | |
1909 | ||
1910 | (F) You named a loop to continue, but you're not currently in a loop of | |
1911 | that name, not even if you count where you were called from. See | |
1912 | L<perlfunc/last>. | |
1913 | ||
1914 | =item Label not found for "redo %s" | |
1915 | ||
1916 | (F) You named a loop to restart, but you're not currently in a loop of | |
1917 | that name, not even if you count where you were called from. See | |
1918 | L<perlfunc/last>. | |
1919 | ||
85ab1d1d | 1920 | =item leaving effective %s failed |
5ff3f7a4 | 1921 | |
85ab1d1d | 1922 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
1923 | effective uids or gids failed. |
1924 | ||
69282e91 | 1925 | =item listen() on closed socket %s |
a0d0e21e | 1926 | |
be771a83 GS |
1927 | (W closed) You tried to do a listen on a closed socket. Did you forget |
1928 | to check the return value of your socket() call? See | |
1929 | L<perlfunc/listen>. | |
a0d0e21e | 1930 | |
5d3e98de RGS |
1931 | =item lstat() on filehandle %s |
1932 | ||
1933 | (W io) You tried to do an lstat on a filehandle. What did you mean | |
1934 | by that? lstat() makes sense only on filenames. (Perl did a fstat() | |
1935 | instead on the filehandle.) | |
1936 | ||
cd06dffe GS |
1937 | =item Lvalue subs returning %s not implemented yet |
1938 | ||
1939 | (F) Due to limitations in the current implementation, array and hash | |
be771a83 GS |
1940 | values cannot be returned in subroutines used in lvalue context. See |
1941 | L<perlsub/"Lvalue subroutines">. | |
cd06dffe | 1942 | |
5cd5c422 RB |
1943 | =item Lookbehind longer than %d not implemented in regex; |
1944 | ||
1945 | marked by <-- HERE in m/%s/ | |
b45f050a JF |
1946 | |
1947 | (F) There is currently a limit on the length of string which lookbehind can | |
7253e4e3 RK |
1948 | handle. This restriction may be eased in a future release. The <-- HERE |
1949 | shows in the regular expression about where the problem was discovered. | |
2e50fd82 | 1950 | |
6df41af2 GS |
1951 | =item Malformed PERLLIB_PREFIX |
1952 | ||
1953 | (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form | |
1954 | ||
1955 | prefix1;prefix2 | |
1956 | ||
1957 | or | |
6df41af2 GS |
1958 | prefix1 prefix2 |
1959 | ||
be771a83 GS |
1960 | with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of |
1961 | a builtin library search path, prefix2 is substituted. The error may | |
1962 | appear if components are not found, or are too long. See | |
fecfaeb8 | 1963 | "PERLLIB_PREFIX" in L<perlos2>. |
6df41af2 | 1964 | |
2f758a16 ST |
1965 | =item Malformed prototype for %s: %s |
1966 | ||
d37a9538 ST |
1967 | (F) You tried to use a function with a malformed prototype. The |
1968 | syntax of function prototypes is given a brief compile-time check for | |
1969 | obvious errors like invalid characters. A more rigorous check is run | |
1970 | when the function is called. | |
2f758a16 | 1971 | |
ba210ebe JH |
1972 | =item Malformed UTF-8 character (%s) |
1973 | ||
1974 | Perl detected something that didn't comply with UTF-8 encoding rules. | |
1975 | ||
901b21bf JH |
1976 | One possible cause is that you read in data that you thought to be in |
1977 | UTF-8 but it wasn't (it was for example legacy 8-bit data). Another | |
1978 | possibility is careless use of utf8::upgrade(). | |
1979 | ||
dea0fc0b JH |
1980 | =item Malformed UTF-16 surrogate |
1981 | ||
1982 | Perl thought it was reading UTF-16 encoded character data but while | |
1983 | doing it Perl met a malformed Unicode surrogate. | |
1984 | ||
5cd5c422 RB |
1985 | =item %s matches null string many times in regex; |
1986 | ||
1987 | marked by <-- HERE in m/%s/ | |
6df41af2 GS |
1988 | |
1989 | (W regexp) The pattern you've specified would be an infinite loop if the | |
7253e4e3 RK |
1990 | regular expression engine didn't specifically check for that. The <-- HERE |
1991 | shows in the regular expression about where the problem was discovered. | |
1992 | See L<perlre>. | |
6df41af2 | 1993 | |
25f58aea PN |
1994 | =item "%s" may clash with future reserved word |
1995 | ||
1996 | (W) This warning may be due to running a perl5 script through a perl4 | |
1997 | interpreter, especially if the word that is being warned about is | |
1998 | "use" or "my". | |
1999 | ||
6df41af2 GS |
2000 | =item % may only be used in unpack |
2001 | ||
2002 | (F) You can't pack a string by supplying a checksum, because the | |
be771a83 GS |
2003 | checksumming process loses information, and you can't go the other way. |
2004 | See L<perlfunc/unpack>. | |
6df41af2 | 2005 | |
a0d0e21e LW |
2006 | =item Method for operation %s not found in package %s during blessing |
2007 | ||
2008 | (F) An attempt was made to specify an entry in an overloading table that | |
e7ea3e70 | 2009 | doesn't resolve to a valid subroutine. See L<overload>. |
a0d0e21e | 2010 | |
3cdd684c TP |
2011 | =item Method %s not permitted |
2012 | ||
2013 | See Server error. | |
2014 | ||
a0d0e21e LW |
2015 | =item Might be a runaway multi-line %s string starting on line %d |
2016 | ||
2017 | (S) An advisory indicating that the previous error may have been caused | |
2018 | by a missing delimiter on a string or pattern, because it eventually | |
2019 | ended earlier on the current line. | |
2020 | ||
2021 | =item Misplaced _ in number | |
2022 | ||
d4ced10d JH |
2023 | (W syntax) An underscore (underbar) in a numeric constant did not |
2024 | separate two digits. | |
a0d0e21e | 2025 | |
4a2d328f | 2026 | =item Missing %sbrace%s on \N{} |
423cee85 | 2027 | |
4a2d328f | 2028 | (F) Wrong syntax of character name literal C<\N{charname}> within |
423cee85 JH |
2029 | double-quotish context. |
2030 | ||
a0d0e21e LW |
2031 | =item Missing comma after first argument to %s function |
2032 | ||
2033 | (F) While certain functions allow you to specify a filehandle or an | |
2034 | "indirect object" before the argument list, this ain't one of them. | |
2035 | ||
06eaf0bc GS |
2036 | =item Missing command in piped open |
2037 | ||
be771a83 GS |
2038 | (W pipe) You used the C<open(FH, "| command")> or |
2039 | C<open(FH, "command |")> construction, but the command was missing or | |
2040 | blank. | |
06eaf0bc | 2041 | |
6df41af2 GS |
2042 | =item Missing name in "my sub" |
2043 | ||
be771a83 GS |
2044 | (F) The reserved syntax for lexically scoped subroutines requires that |
2045 | they have a name with which they can be found. | |
6df41af2 GS |
2046 | |
2047 | =item Missing $ on loop variable | |
2048 | ||
be771a83 GS |
2049 | (F) Apparently you've been programming in B<csh> too much. Variables |
2050 | are always mentioned with the $ in Perl, unlike in the shells, where it | |
2051 | can vary from one line to the next. | |
6df41af2 | 2052 | |
cc507455 | 2053 | =item (Missing operator before %s?) |
748a9306 LW |
2054 | |
2055 | (S) This is an educated guess made in conjunction with the message "%s | |
2056 | found where operator expected". Often the missing operator is a comma. | |
2057 | ||
ab13f0c7 JH |
2058 | =item Missing right brace on %s |
2059 | ||
2060 | (F) Missing right brace in C<\p{...}> or C<\P{...}>. | |
2061 | ||
d98d5fff | 2062 | =item Missing right curly or square bracket |
a0d0e21e | 2063 | |
be771a83 GS |
2064 | (F) The lexer counted more opening curly or square brackets than closing |
2065 | ones. As a general rule, you'll find it's missing near the place you | |
2066 | were last editing. | |
a0d0e21e | 2067 | |
6df41af2 GS |
2068 | =item (Missing semicolon on previous line?) |
2069 | ||
2070 | (S) This is an educated guess made in conjunction with the message "%s | |
2071 | found where operator expected". Don't automatically put a semicolon on | |
2072 | the previous line just because you saw this message. | |
2073 | ||
a0d0e21e LW |
2074 | =item Modification of a read-only value attempted |
2075 | ||
2076 | (F) You tried, directly or indirectly, to change the value of a | |
5f05dabc | 2077 | constant. You didn't, of course, try "2 = 1", because the compiler |
a0d0e21e LW |
2078 | catches that. But an easy way to do the same thing is: |
2079 | ||
2080 | sub mod { $_[0] = 1 } | |
2081 | mod(2); | |
2082 | ||
2083 | Another way is to assign to a substr() that's off the end of the string. | |
2084 | ||
c5674021 |
2085 | Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR> |
2086 | is aliased to a constant in the look I<LIST>: | |
2087 | ||
2088 | $x = 1; | |
2089 | foreach my $n ($x, 2) { | |
2090 | $n *= 2; # modifies the $x, but fails on attempt to modify the 2 | |
64977eb6 | 2091 | } |
c5674021 | 2092 | |
7a4340ed | 2093 | =item Modification of non-creatable array value attempted, %s |
a0d0e21e LW |
2094 | |
2095 | (F) You tried to make an array value spring into existence, and the | |
2096 | subscript was probably negative, even counting from end of the array | |
2097 | backwards. | |
2098 | ||
7a4340ed | 2099 | =item Modification of non-creatable hash value attempted, %s |
a0d0e21e | 2100 | |
be771a83 GS |
2101 | (P) You tried to make a hash value spring into existence, and it |
2102 | couldn't be created for some peculiar reason. | |
a0d0e21e LW |
2103 | |
2104 | =item Module name must be constant | |
2105 | ||
2106 | (F) Only a bare module name is allowed as the first argument to a "use". | |
2107 | ||
be98fb35 | 2108 | =item Module name required with -%c option |
6df41af2 | 2109 | |
be98fb35 GS |
2110 | (F) The C<-M> or C<-m> options say that Perl should load some module, but |
2111 | you omitted the name of the module. Consult L<perlrun> for full details | |
2112 | about C<-M> and C<-m>. | |
6df41af2 | 2113 | |
ed9aa3b7 SG |
2114 | =item More than one argument to open |
2115 | ||
2116 | (F) The C<open> function has been asked to open multiple files. This | |
2117 | can happen if you are trying to open a pipe to a command that takes a | |
2118 | list of arguments, but have forgotten to specify a piped open mode. | |
2119 | See L<perlfunc/open> for details. | |
2120 | ||
a0d0e21e LW |
2121 | =item msg%s not implemented |
2122 | ||
2123 | (F) You don't have System V message IPC on your system. | |
2124 | ||
2125 | =item Multidimensional syntax %s not supported | |
2126 | ||
75b44862 GS |
2127 | (W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>. |
2128 | They're written like C<$foo[1][2][3]>, as in C. | |
8b1a09fc | 2129 | |
6df41af2 | 2130 | =item / must be followed by a*, A* or Z* |
09bef843 | 2131 | |
6df41af2 | 2132 | (F) You had a pack template indicating a counted-length string, |
be771a83 GS |
2133 | Currently the only things that can have their length counted are a*, A* |
2134 | or Z*. See L<perlfunc/pack>. | |
6df41af2 GS |
2135 | |
2136 | =item / must be followed by a, A or Z | |
2137 | ||
be771a83 GS |
2138 | (F) You had an unpack template indicating a counted-length string, which |
2139 | must be followed by one of the letters a, A or Z to indicate what sort | |
2140 | of string is to be unpacked. See L<perlfunc/pack>. | |
6df41af2 GS |
2141 | |
2142 | =item / must follow a numeric type | |
2143 | ||
be771a83 GS |
2144 | (F) You had an unpack template that contained a '#', but this did not |
2145 | follow some numeric unpack specification. See L<perlfunc/pack>. | |
6df41af2 GS |
2146 | |
2147 | =item "my sub" not yet implemented | |
2148 | ||
be771a83 GS |
2149 | (F) Lexically scoped subroutines are not yet implemented. Don't try |
2150 | that yet. | |
6df41af2 GS |
2151 | |
2152 | =item "my" variable %s can't be in a package | |
2153 | ||
be771a83 GS |
2154 | (F) Lexically scoped variables aren't in a package, so it doesn't make |
2155 | sense to try to declare one with a package qualifier on the front. Use | |
2156 | local() if you want to localize a package variable. | |
09bef843 | 2157 | |
8b1a09fc | 2158 | =item Name "%s::%s" used only once: possible typo |
2159 | ||
e476b1b5 | 2160 | (W once) Typographical errors often show up as unique variable names. |
be771a83 GS |
2161 | If you had a good reason for having a unique name, then just mention it |
2162 | again somehow to suppress the message. The C<our> declaration is | |
77ca0c92 | 2163 | provided for this purpose. |
a0d0e21e LW |
2164 | |
2165 | =item Negative length | |
2166 | ||
be771a83 GS |
2167 | (F) You tried to do a read/write/send/recv operation with a buffer |
2168 | length that is less than 0. This is difficult to imagine. | |
a0d0e21e | 2169 | |
ed9aa3b7 SG |
2170 | =item Negative offset to vec in lvalue context |
2171 | ||
2172 | (F) When C<vec> is called in an lvalue context, the second argument must be | |
2173 | greater than or equal to zero. | |
2174 | ||
7253e4e3 | 2175 | =item Nested quantifiers in regex; marked by <-- HERE in m/%s/ |
a0d0e21e | 2176 | |
b45f050a | 2177 | (F) You can't quantify a quantifier without intervening parentheses. So |
7253e4e3 | 2178 | things like ** or +* or ?* are illegal. The <-- HERE shows in the regular |
b45f050a | 2179 | expression about where the problem was discovered. |
a0d0e21e | 2180 | |
7253e4e3 | 2181 | Note that the minimal matching quantifiers, C<*?>, C<+?>, and |
be771a83 | 2182 | C<??> appear to be nested quantifiers, but aren't. See L<perlre>. |
a0d0e21e | 2183 | |
6df41af2 | 2184 | =item %s never introduced |
a0d0e21e | 2185 | |
be771a83 GS |
2186 | (S internal) The symbol in question was declared but somehow went out of |
2187 | scope before it could possibly have been used. | |
a0d0e21e LW |
2188 | |
2189 | =item No %s allowed while running setuid | |
2190 | ||
be771a83 GS |
2191 | (F) Certain operations are deemed to be too insecure for a setuid or |
2192 | setgid script to even be allowed to attempt. Generally speaking there | |
2193 | will be another way to do what you want that is, if not secure, at least | |
2194 | securable. See L<perlsec>. | |
a0d0e21e LW |
2195 | |
2196 | =item No B<-e> allowed in setuid scripts | |
2197 | ||
2198 | (F) A setuid script can't be specified by the user. | |
2199 | ||
2200 | =item No comma allowed after %s | |
2201 | ||
2202 | (F) A list operator that has a filehandle or "indirect object" is not | |
2203 | allowed to have a comma between that and the following arguments. | |
2204 | Otherwise it'd be just another one of the arguments. | |
2205 | ||
0a753a76 | 2206 | One possible cause for this is that you expected to have imported a |
2207 | constant to your name space with B<use> or B<import> while no such | |
2208 | importing took place, it may for example be that your operating system | |
2209 | does not support that particular constant. Hopefully you did use an | |
2210 | explicit import list for the constants you expect to see, please see | |
2211 | L<perlfunc/use> and L<perlfunc/import>. While an explicit import list | |
2212 | would probably have caught this error earlier it naturally does not | |
2213 | remedy the fact that your operating system still does not support that | |
2214 | constant. Maybe you have a typo in the constants of the symbol import | |
2215 | list of B<use> or B<import> or in the constant name at the line where | |
2216 | this error was triggered? | |
2217 | ||
748a9306 LW |
2218 | =item No command into which to pipe on command line |
2219 | ||
be771a83 GS |
2220 | (F) An error peculiar to VMS. Perl handles its own command line |
2221 | redirection, and found a '|' at the end of the command line, so it | |
2222 | doesn't know where you want to pipe the output from this command. | |
748a9306 | 2223 | |
a0d0e21e LW |
2224 | =item No DB::DB routine defined |
2225 | ||
be771a83 GS |
2226 | (F) The currently executing code was compiled with the B<-d> switch, but |
2227 | for some reason the perl5db.pl file (or some facsimile thereof) didn't | |
2228 | define a routine to be called at the beginning of each statement. Which | |
2229 | is odd, because the file should have been required automatically, and | |
2230 | should have blown up the require if it didn't parse right. | |
a0d0e21e LW |
2231 | |
2232 | =item No dbm on this machine | |
2233 | ||
2234 | (P) This is counted as an internal error, because every machine should | |
5f05dabc | 2235 | supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>. |
a0d0e21e LW |
2236 | |
2237 | =item No DBsub routine | |
2238 | ||
2239 | (F) The currently executing code was compiled with the B<-d> switch, | |
2240 | but for some reason the perl5db.pl file (or some facsimile thereof) | |
2241 | didn't define a DB::sub routine to be called at the beginning of each | |
2242 | ordinary subroutine call. | |
2243 | ||
c47ff5f1 | 2244 | =item No error file after 2> or 2>> on command line |
748a9306 | 2245 | |
be771a83 GS |
2246 | (F) An error peculiar to VMS. Perl handles its own command line |
2247 | redirection, and found a '2>' or a '2>>' on the command line, but can't | |
2248 | find the name of the file to which to write data destined for stderr. | |
748a9306 | 2249 | |
c47ff5f1 | 2250 | =item No input file after < on command line |
748a9306 | 2251 | |
be771a83 GS |
2252 | (F) An error peculiar to VMS. Perl handles its own command line |
2253 | redirection, and found a '<' on the command line, but can't find the | |
2254 | name of the file from which to read data for stdin. | |
748a9306 | 2255 | |
6df41af2 GS |
2256 | =item No #! line |
2257 | ||
2258 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2259 | even on machines that don't support the #! construct. | |
2260 | ||
2261 | =item "no" not allowed in expression | |
2262 | ||
be771a83 GS |
2263 | (F) The "no" keyword is recognized and executed at compile time, and |
2264 | returns no useful value. See L<perlmod>. | |
6df41af2 | 2265 | |
c47ff5f1 | 2266 | =item No output file after > on command line |
748a9306 | 2267 | |
be771a83 GS |
2268 | (F) An error peculiar to VMS. Perl handles its own command line |
2269 | redirection, and found a lone '>' at the end of the command line, so it | |
2270 | doesn't know where you wanted to redirect stdout. | |
748a9306 | 2271 | |
c47ff5f1 | 2272 | =item No output file after > or >> on command line |
748a9306 | 2273 | |
be771a83 GS |
2274 | (F) An error peculiar to VMS. Perl handles its own command line |
2275 | redirection, and found a '>' or a '>>' on the command line, but can't | |
2276 | find the name of the file to which to write data destined for stdout. | |
748a9306 | 2277 | |
1ec3e8de GS |
2278 | =item No package name allowed for variable %s in "our" |
2279 | ||
be771a83 GS |
2280 | (F) Fully qualified variable names are not allowed in "our" |
2281 | declarations, because that doesn't make much sense under existing | |
2282 | semantics. Such syntax is reserved for future extensions. | |
1ec3e8de | 2283 | |
a0d0e21e LW |
2284 | =item No Perl script found in input |
2285 | ||
2286 | (F) You called C<perl -x>, but no line was found in the file beginning | |
2287 | with #! and containing the word "perl". | |
2288 | ||
2289 | =item No setregid available | |
2290 | ||
2291 | (F) Configure didn't find anything resembling the setregid() call for | |
2292 | your system. | |
2293 | ||
2294 | =item No setreuid available | |
2295 | ||
2296 | (F) Configure didn't find anything resembling the setreuid() call for | |
2297 | your system. | |
2298 | ||
a67e862a | 2299 | =item No space allowed after -%c |
a0d0e21e | 2300 | |
be771a83 GS |
2301 | (F) The argument to the indicated command line switch must follow |
2302 | immediately after the switch, without intervening spaces. | |
a0d0e21e | 2303 | |
6df41af2 GS |
2304 | =item No %s specified for -%c |
2305 | ||
2306 | (F) The indicated command line switch needs a mandatory argument, but | |
2307 | you haven't specified one. | |
2308 | ||
2c692339 RGS |
2309 | =item No such class %s |
2310 | ||
2311 | (F) You provided a class qualifier in a "my" or "our" declaration, but | |
2312 | this class doesn't exist at this point in your program. | |
2313 | ||
6df41af2 GS |
2314 | =item No such pipe open |
2315 | ||
2316 | (P) An error peculiar to VMS. The internal routine my_pclose() tried to | |
be771a83 GS |
2317 | close a pipe which hadn't been opened. This should have been caught |
2318 | earlier as an attempt to close an unopened filehandle. | |
6df41af2 | 2319 | |
a0d0e21e LW |
2320 | =item No such signal: SIG%s |
2321 | ||
be771a83 GS |
2322 | (W signal) You specified a signal name as a subscript to %SIG that was |
2323 | not recognized. Say C<kill -l> in your shell to see the valid signal | |
2324 | names on your system. | |
a0d0e21e LW |
2325 | |
2326 | =item Not a CODE reference | |
2327 | ||
2328 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2329 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
2330 | use the ref() function to find out what kind of ref it really was. See |
2331 | also L<perlref>. | |
a0d0e21e LW |
2332 | |
2333 | =item Not a format reference | |
2334 | ||
2335 | (F) I'm not sure how you managed to generate a reference to an anonymous | |
2336 | format, but this indicates you did, and that it didn't exist. | |
2337 | ||
2338 | =item Not a GLOB reference | |
2339 | ||
be771a83 GS |
2340 | (F) Perl was trying to evaluate a reference to a "typeglob" (that is, a |
2341 | symbol table entry that looks like C<*foo>), but found a reference to | |
2342 | something else instead. You can use the ref() function to find out what | |
2343 | kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
2344 | |
2345 | =item Not a HASH reference | |
2346 | ||
be771a83 GS |
2347 | (F) Perl was trying to evaluate a reference to a hash value, but found a |
2348 | reference to something else instead. You can use the ref() function to | |
2349 | find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e | 2350 | |
6df41af2 GS |
2351 | =item Not an ARRAY reference |
2352 | ||
be771a83 GS |
2353 | (F) Perl was trying to evaluate a reference to an array value, but found |
2354 | a reference to something else instead. You can use the ref() function | |
2355 | to find out what kind of ref it really was. See L<perlref>. | |
6df41af2 | 2356 | |
a0d0e21e LW |
2357 | =item Not a perl script |
2358 | ||
2359 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2360 | even on machines that don't support the #! construct. The line must | |
2361 | mention perl. | |
2362 | ||
2363 | =item Not a SCALAR reference | |
2364 | ||
be771a83 GS |
2365 | (F) Perl was trying to evaluate a reference to a scalar value, but found |
2366 | a reference to something else instead. You can use the ref() function | |
2367 | to find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
2368 | |
2369 | =item Not a subroutine reference | |
2370 | ||
2371 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2372 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
2373 | use the ref() function to find out what kind of ref it really was. See |
2374 | also L<perlref>. | |
a0d0e21e | 2375 | |
e7ea3e70 | 2376 | =item Not a subroutine reference in overload table |
a0d0e21e LW |
2377 | |
2378 | (F) An attempt was made to specify an entry in an overloading table that | |
8b1a09fc | 2379 | doesn't somehow point to a valid subroutine. See L<overload>. |
a0d0e21e | 2380 | |
a0d0e21e LW |
2381 | =item Not enough arguments for %s |
2382 | ||
2383 | (F) The function requires more arguments than you specified. | |
2384 | ||
6df41af2 GS |
2385 | =item Not enough format arguments |
2386 | ||
be771a83 GS |
2387 | (W syntax) A format specified more picture fields than the next line |
2388 | supplied. See L<perlform>. | |
6df41af2 GS |
2389 | |
2390 | =item %s: not found | |
2391 | ||
be771a83 GS |
2392 | (A) You've accidentally run your script through the Bourne shell instead |
2393 | of Perl. Check the #! line, or manually feed your script into Perl | |
2394 | yourself. | |
6df41af2 | 2395 | |
206947d2 IZ |
2396 | =item %s not allowed in length fields |
2397 | ||
2398 | (F) The count in the (un)pack template may be replaced by C<[TEMPLATE]> only if | |
2399 | C<TEMPLATE> always matches the same amount of packed bytes. Redesign | |
2400 | the template. | |
2401 | ||
6df41af2 | 2402 | =item no UTC offset information; assuming local time is UTC |
a0d0e21e | 2403 | |
6df41af2 GS |
2404 | (S) A warning peculiar to VMS. Perl was unable to find the local |
2405 | timezone offset, so it's assuming that local system time is equivalent | |
be771a83 GS |
2406 | to UTC. If it's not, define the logical name |
2407 | F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which | |
2408 | need to be added to UTC to get local time. | |
a0d0e21e LW |
2409 | |
2410 | =item Null filename used | |
2411 | ||
be771a83 GS |
2412 | (F) You can't require the null filename, especially because on many |
2413 | machines that means the current directory! See L<perlfunc/require>. | |
a0d0e21e | 2414 | |
6df41af2 GS |
2415 | =item NULL OP IN RUN |
2416 | ||
be771a83 GS |
2417 | (P debugging) Some internal routine called run() with a null opcode |
2418 | pointer. | |
6df41af2 | 2419 | |
55497cff | 2420 | =item Null picture in formline |
2421 | ||
2422 | (F) The first argument to formline must be a valid format picture | |
2423 | specification. It was found to be empty, which probably means you | |
2424 | supplied it an uninitialized value. See L<perlform>. | |
2425 | ||
a0d0e21e LW |
2426 | =item Null realloc |
2427 | ||
2428 | (P) An attempt was made to realloc NULL. | |
2429 | ||
2430 | =item NULL regexp argument | |
2431 | ||
5f05dabc | 2432 | (P) The internal pattern matching routines blew it big time. |
a0d0e21e LW |
2433 | |
2434 | =item NULL regexp parameter | |
2435 | ||
2436 | (P) The internal pattern matching routines are out of their gourd. | |
2437 | ||
fc36a67e | 2438 | =item Number too long |
2439 | ||
be771a83 | 2440 | (F) Perl limits the representation of decimal numbers in programs to |
da75cd15 | 2441 | about 250 characters. You've exceeded that length. Future |
be771a83 GS |
2442 | versions of Perl are likely to eliminate this arbitrary limitation. In |
2443 | the meantime, try using scientific notation (e.g. "1e6" instead of | |
2444 | "1_000_000"). | |
fc36a67e | 2445 | |
6df41af2 GS |
2446 | =item Octal number in vector unsupported |
2447 | ||
be771a83 GS |
2448 | (F) Numbers with a leading C<0> are not currently allowed in vectors. |
2449 | The octal number interpretation of such numbers may be supported in a | |
2450 | future version. | |
6df41af2 | 2451 | |
252aa082 JH |
2452 | =item Octal number > 037777777777 non-portable |
2453 | ||
75b44862 | 2454 | (W portable) The octal number you specified is larger than 2**32-1 |
be771a83 GS |
2455 | (4294967295) and therefore non-portable between systems. See |
2456 | L<perlport> for more on portability concerns. | |
252aa082 JH |
2457 | |
2458 | See also L<perlport> for writing portable code. | |
2459 | ||
6ad11d81 JH |
2460 | =item Odd number of arguments for overload::constant |
2461 | ||
04a80ee0 RGS |
2462 | (W overload) The call to overload::constant contained an odd number of |
2463 | arguments. The arguments should come in pairs. | |
6ad11d81 | 2464 | |
b21befc1 MG |
2465 | =item Odd number of elements in anonymous hash |
2466 | ||
2467 | (W misc) You specified an odd number of elements to initialize a hash, | |
2468 | which is odd, because hashes come in key/value pairs. | |
2469 | ||
1930e939 | 2470 | =item Odd number of elements in hash assignment |
a0d0e21e | 2471 | |
be771a83 GS |
2472 | (W misc) You specified an odd number of elements to initialize a hash, |
2473 | which is odd, because hashes come in key/value pairs. | |
a0d0e21e | 2474 | |
bbce6d69 | 2475 | =item Offset outside string |
2476 | ||
2477 | (F) You tried to do a read/write/send/recv operation with an offset | |
be771a83 GS |
2478 | pointing outside the buffer. This is difficult to imagine. The sole |
2479 | exception to this is that C<sysread()>ing past the buffer will extend | |
2480 | the buffer and zero pad the new area. | |
bbce6d69 | 2481 | |
9ddeeac9 JH |
2482 | =item -%s on unopened filehandle %s |
2483 | ||
2484 | (W unopened) You tried to invoke a file test operator on a filehandle | |
c289d2f7 | 2485 | that isn't open. Check your control flow. See also L<perlfunc/-X>. |
9ddeeac9 | 2486 | |
c289d2f7 | 2487 | =item %s() on unopened %s |
2dd78f96 JH |
2488 | |
2489 | (W unopened) An I/O operation was attempted on a filehandle that was | |
2490 | never initialized. You need to do an open(), a sysopen(), or a socket() | |
2491 | call, or call a constructor from the FileHandle package. | |
2492 | ||
a0d0e21e LW |
2493 | =item oops: oopsAV |
2494 | ||
e476b1b5 | 2495 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e LW |
2496 | |
2497 | =item oops: oopsHV | |
2498 | ||
e476b1b5 | 2499 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e | 2500 | |
56f7f34b | 2501 | =item Operation `%s': no method found, %s |
44a8e56a | 2502 | |
be771a83 GS |
2503 | (F) An attempt was made to perform an overloaded operation for which no |
2504 | handler was defined. While some handlers can be autogenerated in terms | |
2505 | of other handlers, there is no default handler for any operation, unless | |
2506 | C<fallback> overloading key is specified to be true. See L<overload>. | |
44a8e56a | 2507 | |
748a9306 LW |
2508 | =item Operator or semicolon missing before %s |
2509 | ||
be771a83 GS |
2510 | (S ambiguous) You used a variable or subroutine call where the parser |
2511 | was expecting an operator. The parser has assumed you really meant to | |
2512 | use an operator, but this is highly likely to be incorrect. For | |
2513 | example, if you say "*foo *foo" it will be interpreted as if you said | |
2514 | "*foo * 'foo'". | |
748a9306 | 2515 | |
6df41af2 GS |
2516 | =item "our" variable %s redeclared |
2517 | ||
be771a83 GS |
2518 | (W misc) You seem to have already declared the same global once before |
2519 | in the current lexical scope. | |
6df41af2 | 2520 | |
a80b8354 GS |
2521 | =item Out of memory! |
2522 | ||
2523 | (X) The malloc() function returned 0, indicating there was insufficient | |
be771a83 GS |
2524 | remaining memory (or virtual memory) to satisfy the request. Perl has |
2525 | no option but to exit immediately. | |
a80b8354 | 2526 | |
6df41af2 | 2527 | =item Out of memory during "large" request for %s |
a0d0e21e | 2528 | |
6df41af2 GS |
2529 | (F) The malloc() function returned 0, indicating there was insufficient |
2530 | remaining memory (or virtual memory) to satisfy the request. However, | |
be771a83 GS |
2531 | the request was judged large enough (compile-time default is 64K), so a |
2532 | possibility to shut down by trapping this error is granted. | |
a0d0e21e | 2533 | |
1b979e0a | 2534 | =item Out of memory during request for %s |
a0d0e21e | 2535 | |
be771a83 GS |
2536 | (X|F) The malloc() function returned 0, indicating there was |
2537 | insufficient remaining memory (or virtual memory) to satisfy the | |
2538 | request. | |
eff9c6e2 CS |
2539 | |
2540 | The request was judged to be small, so the possibility to trap it | |
2541 | depends on the way perl was compiled. By default it is not trappable. | |
be771a83 GS |
2542 | However, if compiled for this, Perl may use the contents of C<$^M> as an |
2543 | emergency pool after die()ing with this message. In this case the error | |
b022d2d2 IZ |
2544 | is trappable I<once>, and the error message will include the line and file |
2545 | where the failed request happened. | |
55497cff | 2546 | |
1b979e0a IZ |
2547 | =item Out of memory during ridiculously large request |
2548 | ||
2549 | (F) You can't allocate more than 2^31+"small amount" bytes. This error | |
be771a83 GS |
2550 | is most likely to be caused by a typo in the Perl program. e.g., |
2551 | C<$arr[time]> instead of C<$arr[$time]>. | |
1b979e0a | 2552 | |
6df41af2 GS |
2553 | =item Out of memory for yacc stack |
2554 | ||
be771a83 GS |
2555 | (F) The yacc parser wanted to grow its stack so it could continue |
2556 | parsing, but realloc() wouldn't give it more memory, virtual or | |
2557 | otherwise. | |
6df41af2 GS |
2558 | |
2559 | =item @ outside of string | |
2560 | ||
2561 | (F) You had a pack template that specified an absolute position outside | |
2562 | the string being unpacked. See L<perlfunc/pack>. | |
2563 | ||
2564 | =item %s package attribute may clash with future reserved word: %s | |
2565 | ||
be771a83 GS |
2566 | (W reserved) A lowercase attribute name was used that had a |
2567 | package-specific handler. That name might have a meaning to Perl itself | |
2568 | some day, even though it doesn't yet. Perhaps you should use a | |
2569 | mixed-case attribute name, instead. See L<attributes>. | |
6df41af2 | 2570 | |
a0d0e21e LW |
2571 | =item page overflow |
2572 | ||
be771a83 GS |
2573 | (W io) A single call to write() produced more lines than can fit on a |
2574 | page. See L<perlform>. | |
a0d0e21e | 2575 | |
6df41af2 GS |
2576 | =item panic: %s |
2577 | ||
2578 | (P) An internal error. | |
2579 | ||
a0d0e21e LW |
2580 | =item panic: ck_grep |
2581 | ||
2582 | (P) Failed an internal consistency check trying to compile a grep. | |
2583 | ||
2584 | =item panic: ck_split | |
2585 | ||
2586 | (P) Failed an internal consistency check trying to compile a split. | |
2587 | ||
2588 | =item panic: corrupt saved stack index | |
2589 | ||
be771a83 GS |
2590 | (P) The savestack was requested to restore more localized values than |
2591 | there are in the savestack. | |
a0d0e21e | 2592 | |
810b8aa5 GS |
2593 | =item panic: del_backref |
2594 | ||
2595 | (P) Failed an internal consistency check while trying to reset a weak | |
2596 | reference. | |
2597 | ||
a0d0e21e LW |
2598 | =item panic: die %s |
2599 | ||
2600 | (P) We popped the context stack to an eval context, and then discovered | |
2601 | it wasn't an eval context. | |
2602 | ||
290deeac | 2603 | =item panic: pp_match%s |
a0d0e21e | 2604 | |
be771a83 GS |
2605 | (P) The internal pp_match() routine was called with invalid operational |
2606 | data. | |
a0d0e21e | 2607 | |
a0d0e21e LW |
2608 | =item panic: do_subst |
2609 | ||
be771a83 GS |
2610 | (P) The internal pp_subst() routine was called with invalid operational |
2611 | data. | |
a0d0e21e | 2612 | |
2269b42e | 2613 | =item panic: do_trans_%s |
a0d0e21e | 2614 | |
2269b42e | 2615 | (P) The internal do_trans routines were called with invalid operational |
be771a83 | 2616 | data. |
a0d0e21e | 2617 | |
c635e13b | 2618 | =item panic: frexp |
2619 | ||
2620 | (P) The library function frexp() failed, making printf("%f") impossible. | |
2621 | ||
a0d0e21e LW |
2622 | =item panic: goto |
2623 | ||
2624 | (P) We popped the context stack to a context with the specified label, | |
2625 | and then discovered it wasn't a context we know how to do a goto in. | |
2626 | ||
2627 | =item panic: INTERPCASEMOD | |
2628 | ||
2629 | (P) The lexer got into a bad state at a case modifier. | |
2630 | ||
2631 | =item panic: INTERPCONCAT | |
2632 | ||
2633 | (P) The lexer got into a bad state parsing a string with brackets. | |
2634 | ||
e446cec8 IZ |
2635 | =item panic: kid popen errno read |
2636 | ||
2637 | (F) forked child returned an incomprehensible message about its errno. | |
2638 | ||
a0d0e21e LW |
2639 | =item panic: last |
2640 | ||
2641 | (P) We popped the context stack to a block context, and then discovered | |
2642 | it wasn't a block context. | |
2643 | ||
2644 | =item panic: leave_scope clearsv | |
2645 | ||
be771a83 GS |
2646 | (P) A writable lexical variable became read-only somehow within the |
2647 | scope. | |
a0d0e21e LW |
2648 | |
2649 | =item panic: leave_scope inconsistency | |
2650 | ||
2651 | (P) The savestack probably got out of sync. At least, there was an | |
2652 | invalid enum on the top of it. | |
2653 | ||
810b8aa5 GS |
2654 | =item panic: magic_killbackrefs |
2655 | ||
2656 | (P) Failed an internal consistency check while trying to reset all weak | |
2657 | references to an object. | |
2658 | ||
6df41af2 GS |
2659 | =item panic: malloc |
2660 | ||
2661 | (P) Something requested a negative number of bytes of malloc. | |
2662 | ||
a0d0e21e LW |
2663 | =item panic: mapstart |
2664 | ||
2665 | (P) The compiler is screwed up with respect to the map() function. | |
2666 | ||
2667 | =item panic: null array | |
2668 | ||
2669 | (P) One of the internal array routines was passed a null AV pointer. | |
2670 | ||
2671 | =item panic: pad_alloc | |
2672 | ||
2673 | (P) The compiler got confused about which scratch pad it was allocating | |
2674 | and freeing temporaries and lexicals from. | |
2675 | ||
2676 | =item panic: pad_free curpad | |
2677 | ||
2678 | (P) The compiler got confused about which scratch pad it was allocating | |
2679 | and freeing temporaries and lexicals from. | |
2680 | ||
2681 | =item panic: pad_free po | |
2682 | ||
2683 | (P) An invalid scratch pad offset was detected internally. | |
2684 | ||
2685 | =item panic: pad_reset curpad | |
2686 | ||
2687 | (P) The compiler got confused about which scratch pad it was allocating | |
2688 | and freeing temporaries and lexicals from. | |
2689 | ||
2690 | =item panic: pad_sv po | |
2691 | ||
2692 | (P) An invalid scratch pad offset was detected internally. | |
2693 | ||
2694 | =item panic: pad_swipe curpad | |
2695 | ||
2696 | (P) The compiler got confused about which scratch pad it was allocating | |
2697 | and freeing temporaries and lexicals from. | |
2698 | ||
2699 | =item panic: pad_swipe po | |
2700 | ||
2701 | (P) An invalid scratch pad offset was detected internally. | |
2702 | ||
2703 | =item panic: pp_iter | |
2704 | ||
2705 | (P) The foreach iterator got called in a non-loop context frame. | |
2706 | ||
2269b42e JH |
2707 | =item panic: pp_split |
2708 | ||
2709 | (P) Something terrible went wrong in setting up for the split. | |
2710 | ||
a0d0e21e LW |
2711 | =item panic: realloc |
2712 | ||
2713 | (P) Something requested a negative number of bytes of realloc. | |
2714 | ||
2715 | =item panic: restartop | |
2716 | ||
2717 | (P) Some internal routine requested a goto (or something like it), and | |
2718 | didn't supply the destination. | |
2719 | ||
2720 | =item panic: return | |
2721 | ||
2722 | (P) We popped the context stack to a subroutine or eval context, and | |
2723 | then discovered it wasn't a subroutine or eval context. | |
2724 | ||
2725 | =item panic: scan_num | |
2726 | ||
2727 | (P) scan_num() got called on something that wasn't a number. | |
2728 | ||
2729 | =item panic: sv_insert | |
2730 | ||
2731 | (P) The sv_insert() routine was told to remove more string than there | |
2732 | was string. | |
2733 | ||
2734 | =item panic: top_env | |
2735 | ||
6224f72b | 2736 | (P) The compiler attempted to do a goto, or something weird like that. |
a0d0e21e LW |
2737 | |
2738 | =item panic: yylex | |
2739 | ||
2740 | (P) The lexer got into a bad state while processing a case modifier. | |
2741 | ||
dea0fc0b JH |
2742 | =item panic: utf16_to_utf8: odd bytelen |
2743 | ||
2744 | (P) Something tried to call utf16_to_utf8 with an odd (as opposed | |
64977eb6 | 2745 | to even) byte length. |
dea0fc0b | 2746 | |
7b8d334a | 2747 | =item Parentheses missing around "%s" list |
a0d0e21e | 2748 | |
e476b1b5 | 2749 | (W parenthesis) You said something like |
a0d0e21e LW |
2750 | |
2751 | my $foo, $bar = @_; | |
2752 | ||
2753 | when you meant | |
2754 | ||
2755 | my ($foo, $bar) = @_; | |
2756 | ||
54884818 | 2757 | Remember that "my", "our", and "local" bind tighter than comma. |
a0d0e21e | 2758 | |
75b44862 | 2759 | =item Perl %s required--this is only version %s, stopped |
a0d0e21e | 2760 | |
be771a83 GS |
2761 | (F) The module in question uses features of a version of Perl more |
2762 | recent than the currently running version. How long has it been since | |
2763 | you upgraded, anyway? See L<perlfunc/require>. | |
a0d0e21e | 2764 | |
6df41af2 GS |
2765 | =item PERL_SH_DIR too long |
2766 | ||
2767 | (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the | |
fecfaeb8 | 2768 | C<sh>-shell in. See "PERL_SH_DIR" in L<perlos2>. |
6df41af2 GS |
2769 | |
2770 | =item perl: warning: Setting locale failed. | |
2771 | ||
2772 | (S) The whole warning message will look something like: | |
2773 | ||
2774 | perl: warning: Setting locale failed. | |
2775 | perl: warning: Please check that your locale settings: | |
2776 | LC_ALL = "En_US", | |
2777 | LANG = (unset) | |
2778 | are supported and installed on your system. | |
2779 | perl: warning: Falling back to the standard locale ("C"). | |
2780 | ||
2781 | Exactly what were the failed locale settings varies. In the above the | |
2782 | settings were that the LC_ALL was "En_US" and the LANG had no value. | |
0ea6b70f JH |
2783 | This error means that Perl detected that you and/or your operating |
2784 | system supplier and/or system administrator have set up the so-called | |
2785 | locale system but Perl could not use those settings. This was not | |
2786 | dead serious, fortunately: there is a "default locale" called "C" that | |
2787 | Perl can and will use, the script will be run. Before you really fix | |
2788 | the problem, however, you will get the same error message each time | |
2789 | you run Perl. How to really fix the problem can be found in | |
2790 | L<perllocale> section B<LOCALE PROBLEMS>. | |
6df41af2 | 2791 | |
bccbfa77 NC |
2792 | =item perlio: argument list not closed for layer "%s" |
2793 | ||
d7133549 RGS |
2794 | (W layer) When pushing a layer with arguments onto the Perl I/O system you |
2795 | forgot the ) that closes the argument list. (Layers take care of transforming | |
64977eb6 NC |
2796 | data between external and internal representations.) Perl stopped parsing |
2797 | the layer list at this point and did not attempt to push this layer. | |
2798 | If your program didn't explicitly request the failing operation, it may be | |
2799 | the result of the value of the environment variable PERLIO. | |
2800 | ||
d7133549 | 2801 | =item perlio: invalid separator character %s in layer specification list %s |
64977eb6 | 2802 | |
d7133549 | 2803 | (W layer) When pushing layers onto the Perl I/O system, something other than a |
d1be9408 | 2804 | colon or whitespace was seen between the elements of a layer list. |
64977eb6 NC |
2805 | If the previous attribute had a parenthesised parameter list, perhaps that |
2806 | list was terminated too soon. | |
bccbfa77 | 2807 | |
ef0f9817 DD |
2808 | =item perlio: unknown layer "%s" |
2809 | ||
d7133549 | 2810 | (W layer) An attempt was made to push an unknown layer onto the Perl I/O |
ef0f9817 DD |
2811 | system. (Layers take care of transforming data between external and |
2812 | internal representations.) Note that some layers, such as C<mmap>, | |
2813 | are not supported in all environments. If your program didn't | |
2814 | explicitly request the failing operation, it may be the result of the | |
2815 | value of the environment variable PERLIO. | |
2816 | ||
a0d0e21e LW |
2817 | =item Permission denied |
2818 | ||
2819 | (F) The setuid emulator in suidperl decided you were up to no good. | |
2820 | ||
bd3fa61c | 2821 | =item pid %x not a child |
748a9306 | 2822 | |
be771a83 GS |
2823 | (W exec) A warning peculiar to VMS. Waitpid() was asked to wait for a |
2824 | process which isn't a subprocess of the current process. While this is | |
2825 | fine from VMS' perspective, it's probably not what you intended. | |
748a9306 | 2826 | |
3bf38418 WL |
2827 | =item P must have an explicit size |
2828 | ||
2829 | (F) The unpack format P must have an explicit size, not "*". | |
2830 | ||
5cd5c422 RB |
2831 | =item POSIX syntax [%s] belongs inside character classes in regex; |
2832 | ||
2833 | marked by <-- HERE in m/%s/ | |
b45f050a | 2834 | |
9a0b3859 | 2835 | (W regexp) The character class constructs [: :], [= =], and [. .] go |
7253e4e3 RK |
2836 | I<inside> character classes, the [] are part of the construct, for example: |
2837 | /[012[:alpha:]345]/. Note that [= =] and [. .] are not currently | |
2838 | implemented; they are simply placeholders for future extensions and will | |
2839 | cause fatal errors. The <-- HERE shows in the regular expression about | |
2840 | where the problem was discovered. See L<perlre>. | |
b45f050a | 2841 | |
5cd5c422 RB |
2842 | =item POSIX syntax [. .] is reserved for future extensions in regex; |
2843 | ||
2844 | marked by <-- HERE in m/%s/ | |
b45f050a JF |
2845 | |
2846 | (F regexp) Within regular expression character classes ([]) the syntax | |
7253e4e3 RK |
2847 | beginning with "[." and ending with ".]" is reserved for future extensions. |
2848 | If you need to represent those character sequences inside a regular | |
2849 | expression character class, just quote the square brackets with the | |
2850 | backslash: "\[." and ".\]". The <-- HERE shows in the regular expression | |
2851 | about where the problem was discovered. See L<perlre>. | |
b45f050a | 2852 | |
5cd5c422 RB |
2853 | =item POSIX syntax [= =] is reserved for future extensions in regex; |
2854 | ||
2855 | marked by <-- HERE in m/%s/ | |
b45f050a | 2856 | |
7253e4e3 RK |
2857 | (F) Within regular expression character classes ([]) the syntax beginning |
2858 | with "[=" and ending with "=]" is reserved for future extensions. If you | |
2859 | need to represent those character sequences inside a regular expression | |
2860 | character class, just quote the square brackets with the backslash: "\[=" | |
2861 | and "=\]". The <-- HERE shows in the regular expression about where the | |
2862 | problem was discovered. See L<perlre>. | |
b45f050a | 2863 | |
5cd5c422 RB |
2864 | =item POSIX class [:%s:] unknown in regex; |
2865 | ||
2866 | marked by <-- HERE in m/%s/ | |
b45f050a | 2867 | |
7253e4e3 RK |
2868 | (F) The class in the character class [: :] syntax is unknown. The <-- HERE |
2869 | shows in the regular expression about where the problem was discovered. | |
80feea45 JH |
2870 | Note that the POSIX character classes do B<not> have the C<is> prefix |
2871 | the corresponding C interfaces have: in other words, it's C<[[:print:]]>, | |
2872 | not C<isprint>. See L<perlre>. | |
b45f050a | 2873 | |
a0d0e21e LW |
2874 | =item POSIX getpgrp can't take an argument |
2875 | ||
81777298 | 2876 | (F) Your system has POSIX getpgrp(), which takes no argument, unlike |
a0d0e21e LW |
2877 | the BSD version, which takes a pid. |
2878 | ||
bbce6d69 | 2879 | =item Possible attempt to put comments in qw() list |
2880 | ||
e476b1b5 | 2881 | (W qw) qw() lists contain items separated by whitespace; as with literal |
75b44862 | 2882 | strings, comment characters are not ignored, but are instead treated as |
be771a83 GS |
2883 | literal data. (You may have used different delimiters than the |
2884 | parentheses shown here; braces are also frequently used.) | |
bbce6d69 | 2885 | |
774d564b | 2886 | You probably wrote something like this: |
2887 | ||
54310121 | 2888 | @list = qw( |
774d564b | 2889 | a # a comment |
bbce6d69 | 2890 | b # another comment |
774d564b | 2891 | ); |
bbce6d69 | 2892 | |
2893 | when you should have written this: | |
2894 | ||
774d564b | 2895 | @list = qw( |
54310121 | 2896 | a |
2897 | b | |
774d564b | 2898 | ); |
2899 | ||
2900 | If you really want comments, build your list the | |
2901 | old-fashioned way, with quotes and commas: | |
2902 | ||
2903 | @list = ( | |
2904 | 'a', # a comment | |
2905 | 'b', # another comment | |
2906 | ); | |
bbce6d69 | 2907 | |
2908 | =item Possible attempt to separate words with commas | |
2909 | ||
be771a83 GS |
2910 | (W qw) qw() lists contain items separated by whitespace; therefore |
2911 | commas aren't needed to separate the items. (You may have used | |
2912 | different delimiters than the parentheses shown here; braces are also | |
2913 | frequently used.) | |
bbce6d69 | 2914 | |
54310121 | 2915 | You probably wrote something like this: |
bbce6d69 | 2916 | |
774d564b | 2917 | qw! a, b, c !; |
2918 | ||
2919 | which puts literal commas into some of the list items. Write it without | |
2920 | commas if you don't want them to appear in your data: | |
bbce6d69 | 2921 | |
774d564b | 2922 | qw! a b c !; |
bbce6d69 | 2923 | |
a0d0e21e LW |
2924 | =item Possible memory corruption: %s overflowed 3rd argument |
2925 | ||
2926 | (F) An ioctl() or fcntl() returned more than Perl was bargaining for. | |
2927 | Perl guesses a reasonable buffer size, but puts a sentinel byte at the | |
2928 | end of the buffer just in case. This sentinel byte got clobbered, and | |
2929 | Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>. | |
2930 | ||
18623440 PS |
2931 | =item Possible unintended interpolation of %s in string |
2932 | ||
2933 | (W ambiguous) You said something like `@foo' in a double-quoted string | |
32b0a12e AMS |
2934 | but there was no array C<@foo> in scope at the time. If you wanted a |
2935 | literal @foo, then write it as \@foo; otherwise find out what happened | |
2936 | to the array you apparently lost track of. | |
18623440 | 2937 | |
6df41af2 GS |
2938 | =item Possible Y2K bug: %s |
2939 | ||
2940 | (W y2k) You are concatenating the number 19 with another number, which | |
2941 | could be a potential Year 2000 problem. | |
2942 | ||
8cd79558 GS |
2943 | =item pragma "attrs" is deprecated, use "sub NAME : ATTRS" instead |
2944 | ||
a1063b2d | 2945 | (D deprecated) You have written something like this: |
8cd79558 GS |
2946 | |
2947 | sub doit | |
2948 | { | |
2949 | use attrs qw(locked); | |
2950 | } | |
2951 | ||
2952 | You should use the new declaration syntax instead. | |
2953 | ||
2954 | sub doit : locked | |
2955 | { | |
2956 | ... | |
2957 | ||
2958 | The C<use attrs> pragma is now obsolete, and is only provided for | |
2959 | backward-compatibility. See L<perlsub/"Subroutine Attributes">. | |
2960 | ||
a0d0e21e LW |
2961 | =item Precedence problem: open %s should be open(%s) |
2962 | ||
e476b1b5 | 2963 | (S precedence) The old irregular construct |
cb1a09d0 | 2964 | |
a0d0e21e LW |
2965 | open FOO || die; |
2966 | ||
2967 | is now misinterpreted as | |
2968 | ||
2969 | open(FOO || die); | |
2970 | ||
be771a83 GS |
2971 | because of the strict regularization of Perl 5's grammar into unary and |
2972 | list operators. (The old open was a little of both.) You must put | |
2973 | parentheses around the filehandle, or use the new "or" operator instead | |
2974 | of "||". | |
a0d0e21e | 2975 | |
3cdd684c TP |
2976 | =item Premature end of script headers |
2977 | ||
2978 | See Server error. | |
2979 | ||
6df41af2 GS |
2980 | =item printf() on closed filehandle %s |
2981 | ||
be771a83 | 2982 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 2983 | before now. Check your control flow. |
6df41af2 | 2984 | |
9a7dcd9c | 2985 | =item print() on closed filehandle %s |
a0d0e21e | 2986 | |
be771a83 | 2987 | (W closed) The filehandle you're printing on got itself closed sometime |
c289d2f7 | 2988 | before now. Check your control flow. |
a0d0e21e | 2989 | |
6df41af2 | 2990 | =item Process terminated by SIG%s |
a0d0e21e | 2991 | |
6df41af2 GS |
2992 | (W) This is a standard message issued by OS/2 applications, while *nix |
2993 | applications die in silence. It is considered a feature of the OS/2 | |
2994 | port. One can easily disable this by appropriate sighandlers, see | |
2995 | L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT" | |
fecfaeb8 | 2996 | in L<perlos2>. |
a0d0e21e | 2997 | |
3fe9a6f1 | 2998 | =item Prototype mismatch: %s vs %s |
4633a7c4 | 2999 | |
9a0b3859 | 3000 | (S prototype) The subroutine being declared or defined had previously been |
be771a83 | 3001 | declared or defined with a different function prototype. |
4633a7c4 | 3002 | |
ed9aa3b7 SG |
3003 | =item Prototype not terminated |
3004 | ||
2a6fd447 | 3005 | (F) You've omitted the closing parenthesis in a function prototype |
ed9aa3b7 SG |
3006 | definition. |
3007 | ||
5cd5c422 RB |
3008 | =item Quantifier in {,} bigger than %d in regex; |
3009 | ||
3010 | marked by <-- HERE in m/%s/ | |
9baa0206 | 3011 | |
b45f050a | 3012 | (F) There is currently a limit to the size of the min and max values of the |
7253e4e3 | 3013 | {min,max} construct. The <-- HERE shows in the regular expression about where |
b45f050a | 3014 | the problem was discovered. See L<perlre>. |
9baa0206 | 3015 | |
5cd5c422 RB |
3016 | =item Quantifier unexpected on zero-length expression; |
3017 | ||
3018 | marked by <-- HERE in m/%s/ | |
9baa0206 | 3019 | |
b45f050a JF |
3020 | (W regexp) You applied a regular expression quantifier in a place where |
3021 | it makes no sense, such as on a zero-width assertion. Try putting the | |
3022 | quantifier inside the assertion instead. For example, the way to match | |
3023 | "abc" provided that it is followed by three repetitions of "xyz" is | |
3024 | C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>. | |
9baa0206 | 3025 | |
7253e4e3 RK |
3026 | The <-- HERE shows in the regular expression about where the problem was |
3027 | discovered. | |
3028 | ||
89ea2908 GA |
3029 | =item Range iterator outside integer range |
3030 | ||
3031 | (F) One (or both) of the numeric arguments to the range operator ".." | |
3032 | are outside the range which can be represented by integers internally. | |
be771a83 GS |
3033 | One possible workaround is to force Perl to use magical string increment |
3034 | by prepending "0" to your numbers. | |
89ea2908 | 3035 | |
9a7dcd9c | 3036 | =item readline() on closed filehandle %s |
a0d0e21e | 3037 | |
75b44862 | 3038 | (W closed) The filehandle you're reading from got itself closed sometime |
c289d2f7 | 3039 | before now. Check your control flow. |
a0d0e21e | 3040 | |
6df41af2 GS |
3041 | =item Reallocation too large: %lx |
3042 | ||
3043 | (F) You can't allocate more than 64K on an MS-DOS machine. | |
3044 | ||
4ad56ec9 IZ |
3045 | =item realloc() of freed memory ignored |
3046 | ||
be771a83 GS |
3047 | (S malloc) An internal routine called realloc() on something that had |
3048 | already been freed. | |
4ad56ec9 | 3049 | |
a0d0e21e LW |
3050 | =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch |
3051 | ||
be771a83 GS |
3052 | (F debugging) You can't use the B<-D> option unless the code to produce |
3053 | the desired output is compiled into Perl, which entails some overhead, | |
a0d0e21e LW |
3054 | which is why it's currently left out of your copy. |
3055 | ||
3e0ccd42 | 3056 | =item Recursive inheritance detected in package '%s' |
a0d0e21e LW |
3057 | |
3058 | (F) More than 100 levels of inheritance were used. Probably indicates | |
3059 | an unintended loop in your inheritance hierarchy. | |
3060 | ||
7a4340ed | 3061 | =item Recursive inheritance detected while looking for method %s |
3e0ccd42 | 3062 | |
be771a83 GS |
3063 | (F) More than 100 levels of inheritance were encountered while invoking |
3064 | a method. Probably indicates an unintended loop in your inheritance | |
3065 | hierarchy. | |
3e0ccd42 | 3066 | |
1930e939 TP |
3067 | =item Reference found where even-sized list expected |
3068 | ||
be771a83 GS |
3069 | (W misc) You gave a single reference where Perl was expecting a list |
3070 | with an even number of elements (for assignment to a hash). This usually | |
3071 | means that you used the anon hash constructor when you meant to use | |
3072 | parens. In any case, a hash requires key/value B<pairs>. | |
7b8d334a GS |
3073 | |
3074 | %hash = { one => 1, two => 2, }; # WRONG | |
3075 | %hash = [ qw/ an anon array / ]; # WRONG | |
3076 | %hash = ( one => 1, two => 2, ); # right | |
3077 | %hash = qw( one 1 two 2 ); # also fine | |
3078 | ||
810b8aa5 GS |
3079 | =item Reference is already weak |
3080 | ||
e476b1b5 | 3081 | (W misc) You have attempted to weaken a reference that is already weak. |
810b8aa5 GS |
3082 | Doing so has no effect. |
3083 | ||
a0d0e21e LW |
3084 | =item Reference miscount in sv_replace() |
3085 | ||
be771a83 GS |
3086 | (W internal) The internal sv_replace() function was handed a new SV with |
3087 | a reference count of other than 1. | |
a0d0e21e | 3088 | |
5cd5c422 RB |
3089 | =item Reference to nonexistent group in regex; |
3090 | ||
3091 | marked by <-- HERE in m/%s/ | |
b45f050a JF |
3092 | |
3093 | (F) You used something like C<\7> in your regular expression, but there are | |
3094 | not at least seven sets of capturing parentheses in the expression. If you | |
3095 | wanted to have the character with value 7 inserted into the regular expression, | |
3096 | prepend a zero to make the number at least two digits: C<\07> | |
9baa0206 | 3097 | |
7253e4e3 | 3098 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a | 3099 | discovered. |
9baa0206 | 3100 | |
a0d0e21e LW |
3101 | =item regexp memory corruption |
3102 | ||
3103 | (P) The regular expression engine got confused by what the regular | |
3104 | expression compiler gave it. | |
3105 | ||
b45f050a | 3106 | =item Regexp out of space |
a0d0e21e | 3107 | |
be771a83 GS |
3108 | (P) A "can't happen" error, because safemalloc() should have caught it |
3109 | earlier. | |
a0d0e21e | 3110 | |
7a95317d GS |
3111 | =item Repeat count in pack overflows |
3112 | ||
be771a83 GS |
3113 | (F) You can't specify a repeat count so large that it overflows your |
3114 | signed integers. See L<perlfunc/pack>. | |
7a95317d GS |
3115 | |
3116 | =item Repeat count in unpack overflows | |
3117 | ||
be771a83 GS |
3118 | (F) You can't specify a repeat count so large that it overflows your |
3119 | signed integers. See L<perlfunc/unpack>. | |
7a95317d | 3120 | |
af685957 JH |
3121 | =item Result from %s larger than %d bytes |
3122 | ||
3123 | (W misc) A library call like getgrent() tried to return more results | |
3124 | than Perl was willing to accept. This happens only when Perl has been | |
3125 | compiled to have threads and to have an upper limit on such calls | |
3126 | (the default is to keep regrowing the result buffer until the result fits). | |
3127 | However, now the results were truncated. | |
3128 | ||
a0d0e21e LW |
3129 | =item Reversed %s= operator |
3130 | ||
be771a83 GS |
3131 | (W syntax) You wrote your assignment operator backwards. The = must |
3132 | always comes last, to avoid ambiguity with subsequent unary operators. | |
a0d0e21e LW |
3133 | |
3134 | =item Runaway format | |
3135 | ||
3136 | (F) Your format contained the ~~ repeat-until-blank sequence, but it | |
3137 | produced 200 lines at once, and the 200th line looked exactly like the | |
3138 | 199th line. Apparently you didn't arrange for the arguments to exhaust | |
3139 | themselves, either by using ^ instead of @ (for scalar variables), or by | |
3140 | shifting or popping (for array variables). See L<perlform>. | |
3141 | ||
3142 | =item Scalar value @%s[%s] better written as $%s[%s] | |
3143 | ||
be771a83 GS |
3144 | (W syntax) You've used an array slice (indicated by @) to select a |
3145 | single element of an array. Generally it's better to ask for a scalar | |
3146 | value (indicated by $). The difference is that C<$foo[&bar]> always | |
3147 | behaves like a scalar, both when assigning to it and when evaluating its | |
3148 | argument, while C<@foo[&bar]> behaves like a list when you assign to it, | |
3149 | and provides a list context to its subscript, which can do weird things | |
3150 | if you're expecting only one subscript. | |
a0d0e21e | 3151 | |
748a9306 | 3152 | On the other hand, if you were actually hoping to treat the array |
5f05dabc | 3153 | element as a list, you need to look into how references work, because |
748a9306 LW |
3154 | Perl will not magically convert between scalars and lists for you. See |
3155 | L<perlref>. | |
3156 | ||
a6006777 | 3157 | =item Scalar value @%s{%s} better written as $%s{%s} |
3158 | ||
75b44862 | 3159 | (W syntax) You've used a hash slice (indicated by @) to select a single |
be771a83 GS |
3160 | element of a hash. Generally it's better to ask for a scalar value |
3161 | (indicated by $). The difference is that C<$foo{&bar}> always behaves | |
3162 | like a scalar, both when assigning to it and when evaluating its | |
3163 | argument, while C<@foo{&bar}> behaves like a list when you assign to it, | |
3164 | and provides a list context to its subscript, which can do weird things | |
3165 | if you're expecting only one subscript. | |
3166 | ||
3167 | On the other hand, if you were actually hoping to treat the hash element | |
3168 | as a list, you need to look into how references work, because Perl will | |
3169 | not magically convert between scalars and lists for you. See | |
a6006777 | 3170 | L<perlref>. |
3171 | ||
3e2f796a NIS |
3172 | =item Scalars leaked: %d |
3173 | ||
3174 | (P) Something went wrong in Perl's internal bookkeeping of scalars: | |
3175 | not all scalar variables were deallocated by the time Perl exited. | |
3176 | What this usually indicates is a memory leak, which is of course bad, | |
3177 | especially if the Perl program is intended to be long-running. | |
3178 | ||
a0d0e21e LW |
3179 | =item Script is not setuid/setgid in suidperl |
3180 | ||
54310121 | 3181 | (F) Oddly, the suidperl program was invoked on a script without a setuid |
3182 | or setgid bit set. This doesn't make much sense. | |
a0d0e21e LW |
3183 | |
3184 | =item Search pattern not terminated | |
3185 | ||
3186 | (F) The lexer couldn't find the final delimiter of a // or m{} | |
3187 | construct. Remember that bracketing delimiters count nesting level. | |
fb73857a | 3188 | Missing the leading C<$> from a variable C<$m> may cause this error. |
a0d0e21e | 3189 | |
9ddeeac9 | 3190 | =item %sseek() on unopened filehandle |
a0d0e21e | 3191 | |
be771a83 GS |
3192 | (W unopened) You tried to use the seek() or sysseek() function on a |
3193 | filehandle that was either never opened or has since been closed. | |
a0d0e21e LW |
3194 | |
3195 | =item select not implemented | |
3196 | ||
3197 | (F) This machine doesn't implement the select() system call. | |
3198 | ||
ae21d580 | 3199 | =item Self-ties of arrays and hashes are not supported |
68a4a7e4 | 3200 | |
ae21d580 JH |
3201 | (F) Self-ties are of arrays and hashes are not supported in |
3202 | the current implementation. | |
68a4a7e4 | 3203 | |
6df41af2 | 3204 | =item Semicolon seems to be missing |
a0d0e21e | 3205 | |
75b44862 GS |
3206 | (W semicolon) A nearby syntax error was probably caused by a missing |
3207 | semicolon, or possibly some other missing operator, such as a comma. | |
a0d0e21e LW |
3208 | |
3209 | =item semi-panic: attempt to dup freed string | |
3210 | ||
be771a83 GS |
3211 | (S internal) The internal newSVsv() routine was called to duplicate a |
3212 | scalar that had previously been marked as free. | |
a0d0e21e | 3213 | |
6df41af2 | 3214 | =item sem%s not implemented |
a0d0e21e | 3215 | |
6df41af2 | 3216 | (F) You don't have System V semaphore IPC on your system. |
a0d0e21e | 3217 | |
69282e91 | 3218 | =item send() on closed socket %s |
a0d0e21e | 3219 | |
be771a83 | 3220 | (W closed) The socket you're sending to got itself closed sometime |
c289d2f7 | 3221 | before now. Check your control flow. |
a0d0e21e | 3222 | |
7253e4e3 | 3223 | =item Sequence (? incomplete in regex; marked by <-- HERE in m/%s/ |
7b8d334a | 3224 | |
7253e4e3 | 3225 | (F) A regular expression ended with an incomplete extension (?. The <-- HERE |
b45f050a | 3226 | shows in the regular expression about where the problem was discovered. See |
be771a83 | 3227 | L<perlre>. |
1b1626e4 | 3228 | |
5cd5c422 RB |
3229 | =item Sequence (?{...}) not terminated or not {}-balanced in regex; |
3230 | ||
3231 | marked by <-- HERE in m/%s/ | |
b45f050a JF |
3232 | |
3233 | (F) If the contents of a (?{...}) clause contains braces, they must balance | |
7253e4e3 RK |
3234 | for Perl to properly detect the end of the clause. The <-- HERE shows in |
3235 | the regular expression about where the problem was discovered. See | |
3236 | L<perlre>. | |
a0d0e21e | 3237 | |
5cd5c422 RB |
3238 | =item Sequence (?%s...) not implemented in regex; |
3239 | ||
3240 | marked by <-- HERE in m/%s/ | |
a0d0e21e | 3241 | |
b45f050a | 3242 | (F) A proposed regular expression extension has the character reserved but |
7253e4e3 | 3243 | has not yet been written. The <-- HERE shows in the regular expression about |
b45f050a JF |
3244 | where the problem was discovered. See L<perlre>. |
3245 | ||
5cd5c422 RB |
3246 | =item Sequence (?%s...) not recognized in regex; |
3247 | ||
3248 | marked by <-- HERE in m/%s/ | |
a0d0e21e | 3249 | |
7253e4e3 RK |
3250 | (F) You used a regular expression extension that doesn't make sense. The |
3251 | <-- HERE shows in the regular expression about where the problem was | |
3252 | discovered. See L<perlre>. | |
a0d0e21e | 3253 | |
5cd5c422 RB |
3254 | =item Sequence (?#... not terminated in regex; |
3255 | ||
3256 | marked by <-- HERE in m/%s/ | |
6df41af2 GS |
3257 | |
3258 | (F) A regular expression comment must be terminated by a closing | |
7253e4e3 RK |
3259 | parenthesis. Embedded parentheses aren't allowed. The <-- HERE shows in |
3260 | the regular expression about where the problem was discovered. See | |
3261 | L<perlre>. | |
6df41af2 GS |
3262 | |
3263 | =item 500 Server error | |
3264 | ||
3265 | See Server error. | |
3266 | ||
a5f75d66 AD |
3267 | =item Server error |
3268 | ||
3cdd684c | 3269 | This is the error message generally seen in a browser window when trying |
be771a83 GS |
3270 | to run a CGI program (including SSI) over the web. The actual error text |
3271 | varies widely from server to server. The most frequently-seen variants | |
3272 | are "500 Server error", "Method (something) not permitted", "Document | |
3273 | contains no data", "Premature end of script headers", and "Did not | |
3274 | produce a valid header". | |
9607fc9c | 3275 | |
3276 | B<This is a CGI error, not a Perl error>. | |
3277 | ||
be771a83 GS |
3278 | You need to make sure your script is executable, is accessible by the |
3279 | user CGI is running the script under (which is probably not the user | |
3280 | account you tested it under), does not rely on any environment variables | |
3281 | (like PATH) from the user it isn't running under, and isn't in a | |
3282 | location where the CGI server can't find it, basically, more or less. | |
3283 | Please see the following for more information: | |
9607fc9c | 3284 | |
06a5f41f JH |
3285 | http://www.perl.org/CGI_MetaFAQ.html |
3286 | http://www.htmlhelp.org/faq/cgifaq.html | |
3287 | http://www.w3.org/Security/Faq/ | |
a5f75d66 | 3288 | |
be94a901 GS |
3289 | You should also look at L<perlfaq9>. |
3290 | ||
a0d0e21e LW |
3291 | =item setegid() not implemented |
3292 | ||
be771a83 GS |
3293 | (F) You tried to assign to C<$)>, and your operating system doesn't |
3294 | support the setegid() system call (or equivalent), or at least Configure | |
3295 | didn't think so. | |
a0d0e21e LW |
3296 | |
3297 | =item seteuid() not implemented | |
3298 | ||
be771a83 GS |
3299 | (F) You tried to assign to C<< $> >>, and your operating system doesn't |
3300 | support the seteuid() system call (or equivalent), or at least Configure | |
3301 | didn't think so. | |
a0d0e21e | 3302 | |
81777298 GS |
3303 | =item setpgrp can't take arguments |
3304 | ||
be771a83 GS |
3305 | (F) Your system has the setpgrp() from BSD 4.2, which takes no |
3306 | arguments, unlike POSIX setpgid(), which takes a process ID and process | |
3307 | group ID. | |
81777298 | 3308 | |
a0d0e21e LW |
3309 | =item setrgid() not implemented |
3310 | ||
be771a83 GS |
3311 | (F) You tried to assign to C<$(>, and your operating system doesn't |
3312 | support the setrgid() system call (or equivalent), or at least Configure | |
3313 | didn't think so. | |
a0d0e21e LW |
3314 | |
3315 | =item setruid() not implemented | |
3316 | ||
be771a83 GS |
3317 | (F) You tried to assign to C<$<>, and your operating system doesn't |
3318 | support the setruid() system call (or equivalent), or at least Configure | |
3319 | didn't think so. | |
a0d0e21e | 3320 | |
6df41af2 GS |
3321 | =item setsockopt() on closed socket %s |
3322 | ||
be771a83 GS |
3323 | (W closed) You tried to set a socket option on a closed socket. Did you |
3324 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
3325 | L<perlfunc/setsockopt>. |
3326 | ||
a0d0e21e LW |
3327 | =item Setuid/gid script is writable by world |
3328 | ||
be771a83 GS |
3329 | (F) The setuid emulator won't run a script that is writable by the |
3330 | world, because the world might have written on it already. | |
a0d0e21e LW |
3331 | |
3332 | =item shm%s not implemented | |
3333 | ||
3334 | (F) You don't have System V shared memory IPC on your system. | |
3335 | ||
6df41af2 GS |
3336 | =item <> should be quotes |
3337 | ||
3338 | (F) You wrote C<< require <file> >> when you should have written | |
3339 | C<require 'file'>. | |
3340 | ||
3341 | =item /%s/ should probably be written as "%s" | |
3342 | ||
3343 | (W syntax) You have used a pattern where Perl expected to find a string, | |
be771a83 GS |
3344 | as in the first argument to C<join>. Perl will treat the true or false |
3345 | result of matching the pattern against $_ as the string, which is | |
3346 | probably not what you had in mind. | |
6df41af2 | 3347 | |
69282e91 | 3348 | =item shutdown() on closed socket %s |
a0d0e21e | 3349 | |
75b44862 GS |
3350 | (W closed) You tried to do a shutdown on a closed socket. Seems a bit |
3351 | superfluous. | |
a0d0e21e | 3352 | |
f86702cc | 3353 | =item SIG%s handler "%s" not defined |
a0d0e21e | 3354 | |
be771a83 GS |
3355 | (W signal) The signal handler named in %SIG doesn't, in fact, exist. |
3356 | Perhaps you put it into the wrong package? | |
a0d0e21e LW |
3357 | |
3358 | =item sort is now a reserved word | |
3359 | ||
3360 | (F) An ancient error message that almost nobody ever runs into anymore. | |
3361 | But before sort was a keyword, people sometimes used it as a filehandle. | |
3362 | ||
3363 | =item Sort subroutine didn't return a numeric value | |
3364 | ||
3365 | (F) A sort comparison routine must return a number. You probably blew | |
c47ff5f1 | 3366 | it by not using C<< <=> >> or C<cmp>, or by not using them correctly. |
a0d0e21e LW |
3367 | See L<perlfunc/sort>. |
3368 | ||
3369 | =item Sort subroutine didn't return single value | |
3370 | ||
3371 | (F) A sort comparison subroutine may not return a list value with more | |
3372 | or less than one element. See L<perlfunc/sort>. | |
3373 | ||
8cbc2e3b JH |
3374 | =item splice() offset past end of array |
3375 | ||
3376 | (W misc) You attempted to specify an offset that was past the end of | |
3377 | the array passed to splice(). Splicing will instead commence at the end | |
3378 | of the array, rather than past it. If this isn't what you want, try | |
3379 | explicitly pre-extending the array by assigning $#array = $offset. See | |
3380 | L<perlfunc/splice>. | |
3381 | ||
a0d0e21e LW |
3382 | =item Split loop |
3383 | ||
be771a83 GS |
3384 | (P) The split was looping infinitely. (Obviously, a split shouldn't |
3385 | iterate more times than there are characters of input, which is what | |
3386 | happened.) See L<perlfunc/split>. | |
a0d0e21e | 3387 | |
a0d0e21e LW |
3388 | =item Statement unlikely to be reached |
3389 | ||
be771a83 GS |
3390 | (W exec) You did an exec() with some statement after it other than a |
3391 | die(). This is almost always an error, because exec() never returns | |
3392 | unless there was a failure. You probably wanted to use system() | |
3393 | instead, which does return. To suppress this warning, put the exec() in | |
3394 | a block by itself. | |
a0d0e21e | 3395 | |
9ddeeac9 | 3396 | =item stat() on unopened filehandle %s |
6df41af2 | 3397 | |
355b1299 JH |
3398 | (W unopened) You tried to use the stat() function on a filehandle that |
3399 | was either never opened or has since been closed. | |
6df41af2 | 3400 | |
7a4340ed | 3401 | =item Stub found while resolving method `%s' overloading %s |
e7ea3e70 | 3402 | |
be771a83 GS |
3403 | (P) Overloading resolution over @ISA tree may be broken by importation |
3404 | stubs. Stubs should never be implicitly created, but explicit calls to | |
3405 | C<can> may break this. | |
e7ea3e70 | 3406 | |
a0d0e21e LW |
3407 | =item Subroutine %s redefined |
3408 | ||
e476b1b5 | 3409 | (W redefine) You redefined a subroutine. To suppress this warning, say |
a0d0e21e LW |
3410 | |
3411 | { | |
271595cc | 3412 | no warnings 'redefine'; |
a0d0e21e LW |
3413 | eval "sub name { ... }"; |
3414 | } | |
3415 | ||
3416 | =item Substitution loop | |
3417 | ||
be771a83 GS |
3418 | (P) The substitution was looping infinitely. (Obviously, a substitution |
3419 | shouldn't iterate more times than there are characters of input, which | |
3420 | is what happened.) See the discussion of substitution in | |
5f05dabc | 3421 | L<perlop/"Quote and Quote-like Operators">. |
a0d0e21e LW |
3422 | |
3423 | =item Substitution pattern not terminated | |
3424 | ||
d1be9408 | 3425 | (F) The lexer couldn't find the interior delimiter of an s/// or s{}{} |
a0d0e21e | 3426 | construct. Remember that bracketing delimiters count nesting level. |
fb73857a | 3427 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
3428 | |
3429 | =item Substitution replacement not terminated | |
3430 | ||
d1be9408 | 3431 | (F) The lexer couldn't find the final delimiter of an s/// or s{}{} |
a0d0e21e | 3432 | construct. Remember that bracketing delimiters count nesting level. |
fb73857a | 3433 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
3434 | |
3435 | =item substr outside of string | |
3436 | ||
be771a83 GS |
3437 | (W substr),(F) You tried to reference a substr() that pointed outside of |
3438 | a string. That is, the absolute value of the offset was larger than the | |
3439 | length of the string. See L<perlfunc/substr>. This warning is fatal if | |
3440 | substr is used in an lvalue context (as the left hand side of an | |
3441 | assignment or as a subroutine argument for example). | |
a0d0e21e | 3442 | |
f86702cc | 3443 | =item suidperl is no longer needed since %s |
a0d0e21e | 3444 | |
be771a83 GS |
3445 | (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but |
3446 | a version of the setuid emulator somehow got run anyway. | |
a0d0e21e | 3447 | |
5cd5c422 RB |
3448 | =item Switch (?(condition)... contains too many branches in regex; |
3449 | ||
3450 | marked by <-- HERE in m/%s/ | |
b45f050a JF |
3451 | |
3452 | (F) A (?(condition)if-clause|else-clause) construct can have at most two | |
3453 | branches (the if-clause and the else-clause). If you want one or both to | |
3454 | contain alternation, such as using C<this|that|other>, enclose it in | |
3455 | clustering parentheses: | |
3456 | ||
3457 | (?(condition)(?:this|that|other)|else-clause) | |
3458 | ||
7253e4e3 | 3459 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a JF |
3460 | discovered. See L<perlre>. |
3461 | ||
5cd5c422 RB |
3462 | =item Switch condition not recognized in regex; |
3463 | ||
3464 | marked by <-- HERE in m/%s/ | |
b45f050a JF |
3465 | |
3466 | (F) If the argument to the (?(...)if-clause|else-clause) construct is a | |
7253e4e3 | 3467 | number, it can be only a number. The <-- HERE shows in the regular expression |
b45f050a JF |
3468 | about where the problem was discovered. See L<perlre>. |
3469 | ||
85ab1d1d JH |
3470 | =item switching effective %s is not implemented |
3471 | ||
be771a83 GS |
3472 | (F) While under the C<use filetest> pragma, we cannot switch the real |
3473 | and effective uids or gids. | |
85ab1d1d | 3474 | |
a0d0e21e LW |
3475 | =item syntax error |
3476 | ||
3477 | (F) Probably means you had a syntax error. Common reasons include: | |
3478 | ||
3479 | A keyword is misspelled. | |
3480 | A semicolon is missing. | |
3481 | A comma is missing. | |
3482 | An opening or closing parenthesis is missing. | |
3483 | An opening or closing brace is missing. | |
3484 | A closing quote is missing. | |
3485 | ||
3486 | Often there will be another error message associated with the syntax | |
3487 | error giving more information. (Sometimes it helps to turn on B<-w>.) | |
3488 | The error message itself often tells you where it was in the line when | |
3489 | it decided to give up. Sometimes the actual error is several tokens | |
5f05dabc | 3490 | before this, because Perl is good at understanding random input. |
a0d0e21e LW |
3491 | Occasionally the line number may be misleading, and once in a blue moon |
3492 | the only way to figure out what's triggering the error is to call | |
3493 | C<perl -c> repeatedly, chopping away half the program each time to see | |
be771a83 GS |
3494 | if the error went away. Sort of the cybernetic version of S<20 |
3495 | questions>. | |
a0d0e21e | 3496 | |
cb1a09d0 AD |
3497 | =item syntax error at line %d: `%s' unexpected |
3498 | ||
be771a83 GS |
3499 | (A) You've accidentally run your script through the Bourne shell instead |
3500 | of Perl. Check the #! line, or manually feed your script into Perl | |
3501 | yourself. | |
cb1a09d0 | 3502 | |
25f58aea PN |
3503 | =item syntax error in file %s at line %d, next 2 tokens "%s" |
3504 | ||
3505 | (F) This error is likely to occur if you run a perl5 script through | |
3506 | a perl4 interpreter, especially if the next 2 tokens are "use strict" | |
3507 | or "my $var" or "our $var". | |
3508 | ||
6df41af2 GS |
3509 | =item %s syntax OK |
3510 | ||
3511 | (F) The final summary message when a C<perl -c> succeeds. | |
3512 | ||
6087ac44 | 3513 | =item System V %s is not implemented on this machine |
a0d0e21e | 3514 | |
6087ac44 JH |
3515 | (F) You tried to do something with a function beginning with "sem", |
3516 | "shm", or "msg" but that System V IPC is not implemented in your | |
3517 | machine. In some machines the functionality can exist but be | |
3518 | unconfigured. Consult your system support. | |
a0d0e21e | 3519 | |
69282e91 | 3520 | =item syswrite() on closed filehandle %s |
a0d0e21e | 3521 | |
be771a83 | 3522 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 3523 | before now. Check your control flow. |
a0d0e21e | 3524 | |
fc36a67e | 3525 | =item Target of goto is too deeply nested |
3526 | ||
be771a83 GS |
3527 | (F) You tried to use C<goto> to reach a label that was too deeply nested |
3528 | for Perl to reach. Perl is doing you a favor by refusing. | |
fc36a67e | 3529 | |
9ddeeac9 | 3530 | =item tell() on unopened filehandle |
a0d0e21e | 3531 | |
be771a83 GS |
3532 | (W unopened) You tried to use the tell() function on a filehandle that |
3533 | was either never opened or has since been closed. | |
a0d0e21e | 3534 | |
a0d0e21e LW |
3535 | =item That use of $[ is unsupported |
3536 | ||
be771a83 GS |
3537 | (F) Assignment to C<$[> is now strictly circumscribed, and interpreted |
3538 | as a compiler directive. You may say only one of | |
a0d0e21e LW |
3539 | |
3540 | $[ = 0; | |
3541 | $[ = 1; | |
3542 | ... | |
3543 | local $[ = 0; | |
3544 | local $[ = 1; | |
3545 | ... | |
3546 | ||
be771a83 GS |
3547 | This is to prevent the problem of one module changing the array base out |
3548 | from under another module inadvertently. See L<perlvar/$[>. | |
a0d0e21e | 3549 | |
f86702cc | 3550 | =item The crypt() function is unimplemented due to excessive paranoia |
a0d0e21e LW |
3551 | |
3552 | (F) Configure couldn't find the crypt() function on your machine, | |
3553 | probably because your vendor didn't supply it, probably because they | |
8b1a09fc | 3554 | think the U.S. Government thinks it's a secret, or at least that they |
a0d0e21e LW |
3555 | will continue to pretend that it is. And if you quote me on that, I |
3556 | will deny it. | |
3557 | ||
6df41af2 GS |
3558 | =item The %s function is unimplemented |
3559 | ||
3560 | The function indicated isn't implemented on this architecture, according | |
3561 | to the probings of Configure. | |
3562 | ||
5e1c7ca2 | 3563 | =item The stat preceding %s wasn't an lstat |
a0d0e21e | 3564 | |
be771a83 GS |
3565 | (F) It makes no sense to test the current stat buffer for symbolic |
3566 | linkhood if the last stat that wrote to the stat buffer already went | |
3567 | past the symlink to get to the real file. Use an actual filename | |
3568 | instead. | |
a0d0e21e | 3569 | |
437784d6 | 3570 | =item This Perl can't reset CRTL environ elements (%s) |
f675dbe5 CB |
3571 | |
3572 | =item This Perl can't set CRTL environ elements (%s=%s) | |
3573 | ||
75b44862 | 3574 | (W internal) Warnings peculiar to VMS. You tried to change or delete an |
be771a83 GS |
3575 | element of the CRTL's internal environ array, but your copy of Perl |
3576 | wasn't built with a CRTL that contained the setenv() function. You'll | |
3577 | need to rebuild Perl with a CRTL that does, or redefine | |
3578 | F<PERL_ENV_TABLES> (see L<perlvms>) so that the environ array isn't the | |
3579 | target of the change to | |
f675dbe5 CB |
3580 | %ENV which produced the warning. |
3581 | ||
6b3c7930 JH |
3582 | =item thread failed to start: %s |
3583 | ||
3584 | (F) The entry point function of threads->create() failed for some reason. | |
3585 | ||
a0d0e21e LW |
3586 | =item times not implemented |
3587 | ||
be771a83 GS |
3588 | (F) Your version of the C library apparently doesn't do times(). I |
3589 | suspect you're not running on Unix. | |
a0d0e21e LW |
3590 | |
3591 | =item Too few args to syscall | |
3592 | ||
3593 | (F) There has to be at least one argument to syscall() to specify the | |
3594 | system call to call, silly dilly. | |
3595 | ||
9607fc9c | 3596 | =item Too late for "B<-T>" option |
3597 | ||
3598 | (X) The #! line (or local equivalent) in a Perl script contains the | |
8cc95fdb | 3599 | B<-T> option, but Perl was not invoked with B<-T> in its command line. |
3600 | This is an error because, by the time Perl discovers a B<-T> in a | |
3601 | script, it's too late to properly taint everything from the environment. | |
3602 | So Perl gives up. | |
f86702cc | 3603 | |
9607fc9c | 3604 | If the Perl script is being executed as a command using the #! |
be771a83 GS |
3605 | mechanism (or its local equivalent), this error can usually be fixed by |
3606 | editing the #! line so that the B<-T> option is a part of Perl's first | |
3607 | argument: e.g. change C<perl -n -T> to C<perl -T -n>. | |
f86702cc | 3608 | |
9607fc9c | 3609 | If the Perl script is being executed as C<perl scriptname>, then the |
3610 | B<-T> option must appear on the command line: C<perl -T scriptname>. | |
f86702cc | 3611 | |
8cc95fdb | 3612 | =item Too late for "-%s" option |
3613 | ||
3614 | (X) The #! line (or local equivalent) in a Perl script contains the | |
3615 | B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options | |
3616 | are not intended for use inside scripts. Use the C<use> pragma instead. | |
3617 | ||
ddda08b7 GS |
3618 | =item Too late to run %s block |
3619 | ||
3620 | (W void) A CHECK or INIT block is being defined during run time proper, | |
3621 | when the opportunity to run them has already passed. Perhaps you are | |
be771a83 GS |
3622 | loading a file with C<require> or C<do> when you should be using C<use> |
3623 | instead. Or perhaps you should put the C<require> or C<do> inside a | |
3624 | BEGIN block. | |
ddda08b7 | 3625 | |
a0d0e21e LW |
3626 | =item Too many args to syscall |
3627 | ||
5f05dabc | 3628 | (F) Perl supports a maximum of only 14 args to syscall(). |
a0d0e21e LW |
3629 | |
3630 | =item Too many arguments for %s | |
3631 | ||
3632 | (F) The function requires fewer arguments than you specified. | |
3633 | ||
6df41af2 GS |
3634 | =item Too many )'s |
3635 | ||
8c40cb74 NC |
3636 | =item Too many ('s |
3637 | ||
be771a83 GS |
3638 | (A) You've accidentally run your script through B<csh> instead of Perl. |
3639 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 3640 | |
7253e4e3 | 3641 | =item Trailing \ in regex m/%s/ |
a0d0e21e | 3642 | |
be771a83 GS |
3643 | (F) The regular expression ends with an unbackslashed backslash. |
3644 | Backslash it. See L<perlre>. | |
a0d0e21e | 3645 | |
2c268ad5 | 3646 | =item Transliteration pattern not terminated |
a0d0e21e LW |
3647 | |
3648 | (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] | |
fb73857a | 3649 | or y/// or y[][] construct. Missing the leading C<$> from variables |
3650 | C<$tr> or C<$y> may cause this error. | |
a0d0e21e | 3651 | |
2c268ad5 | 3652 | =item Transliteration replacement not terminated |
a0d0e21e LW |
3653 | |
3654 | (F) The lexer couldn't find the final delimiter of a tr/// or tr[][] | |
3655 | construct. | |
3656 | ||
3657 | =item truncate not implemented | |
3658 | ||
3659 | (F) Your machine doesn't implement a file truncation mechanism that | |
3660 | Configure knows about. | |
3661 | ||
3662 | =item Type of arg %d to %s must be %s (not %s) | |
3663 | ||
3664 | (F) This function requires the argument in that position to be of a | |
8b1a09fc | 3665 | certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be |
3666 | %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the | |
a0d0e21e LW |
3667 | {EXPR} forms as an explicit dereference. See L<perlref>. |
3668 | ||
eec2d3df GS |
3669 | =item umask not implemented |
3670 | ||
be771a83 GS |
3671 | (F) Your machine doesn't implement the umask function and you tried to |
3672 | use it to restrict permissions for yourself (EXPR & 0700). | |
a0d0e21e | 3673 | |
4633a7c4 LW |
3674 | =item Unable to create sub named "%s" |
3675 | ||
3676 | (F) You attempted to create or access a subroutine with an illegal name. | |
3677 | ||
a0d0e21e LW |
3678 | =item Unbalanced context: %d more PUSHes than POPs |
3679 | ||
be771a83 GS |
3680 | (W internal) The exit code detected an internal inconsistency in how |
3681 | many execution contexts were entered and left. | |
a0d0e21e LW |
3682 | |
3683 | =item Unbalanced saves: %d more saves than restores | |
3684 | ||
be771a83 GS |
3685 | (W internal) The exit code detected an internal inconsistency in how |
3686 | many values were temporarily localized. | |
a0d0e21e LW |
3687 | |
3688 | =item Unbalanced scopes: %d more ENTERs than LEAVEs | |
3689 | ||
be771a83 GS |
3690 | (W internal) The exit code detected an internal inconsistency in how |
3691 | many blocks were entered and left. | |
a0d0e21e LW |
3692 | |
3693 | =item Unbalanced tmps: %d more allocs than frees | |
3694 | ||
be771a83 GS |
3695 | (W internal) The exit code detected an internal inconsistency in how |
3696 | many mortal scalars were allocated and freed. | |
a0d0e21e LW |
3697 | |
3698 | =item Undefined format "%s" called | |
3699 | ||
3700 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
3701 | another package? See L<perlform>. | |
3702 | ||
3703 | =item Undefined sort subroutine "%s" called | |
3704 | ||
be771a83 GS |
3705 | (F) The sort comparison routine specified doesn't seem to exist. |
3706 | Perhaps it's in a different package? See L<perlfunc/sort>. | |
a0d0e21e LW |
3707 | |
3708 | =item Undefined subroutine &%s called | |
3709 | ||
be771a83 GS |
3710 | (F) The subroutine indicated hasn't been defined, or if it was, it has |
3711 | since been undefined. | |
a0d0e21e LW |
3712 | |
3713 | =item Undefined subroutine called | |
3714 | ||
3715 | (F) The anonymous subroutine you're trying to call hasn't been defined, | |
3716 | or if it was, it has since been undefined. | |
3717 | ||
3718 | =item Undefined subroutine in sort | |
3719 | ||
be771a83 GS |
3720 | (F) The sort comparison routine specified is declared but doesn't seem |
3721 | to have been defined yet. See L<perlfunc/sort>. | |
a0d0e21e | 3722 | |
4633a7c4 LW |
3723 | =item Undefined top format "%s" called |
3724 | ||
3725 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
3726 | another package? See L<perlform>. | |
3727 | ||
20408e3c GS |
3728 | =item Undefined value assigned to typeglob |
3729 | ||
be771a83 GS |
3730 | (W misc) An undefined value was assigned to a typeglob, a la |
3731 | C<*foo = undef>. This does nothing. It's possible that you really mean | |
3732 | C<undef *foo>. | |
20408e3c | 3733 | |
6df41af2 GS |
3734 | =item %s: Undefined variable |
3735 | ||
be771a83 GS |
3736 | (A) You've accidentally run your script through B<csh> instead of Perl. |
3737 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 3738 | |
a0d0e21e LW |
3739 | =item unexec of %s into %s failed! |
3740 | ||
3741 | (F) The unexec() routine failed for some reason. See your local FSF | |
3742 | representative, who probably put it there in the first place. | |
3743 | ||
3d401ffb JH |
3744 | =item Unicode character %s is illegal |
3745 | ||
507b9800 JH |
3746 | (W utf8) Certain Unicode characters have been designated off-limits by |
3747 | the Unicode standard and should not be generated. If you really know | |
3748 | what you are doing you can turn off this warning by C<no warnings 'utf8';>. | |
b45f050a | 3749 | |
a0d0e21e LW |
3750 | =item Unknown BYTEORDER |
3751 | ||
be771a83 GS |
3752 | (F) There are no byte-swapping functions for a machine with this byte |
3753 | order. | |
a0d0e21e | 3754 | |
2570cdf1 JH |
3755 | =item Unknown "re" subpragma '%s' (known ones are: %s) |
3756 | ||
3757 | You tried to use an unknown subpragma of the "re" pragma. | |
3758 | ||
5cd5c422 RB |
3759 | =item Unknown switch condition (?(%.2s in regex; |
3760 | ||
3761 | marked by <-- HERE in m/%s/ | |
b45f050a | 3762 | |
7253e4e3 RK |
3763 | (F) The condition part of a (?(condition)if-clause|else-clause) construct |
3764 | is not known. The condition may be lookahead or lookbehind (the condition | |
3765 | is true if the lookahead or lookbehind is true), a (?{...}) construct (the | |
3766 | condition is true if the code evaluates to a true value), or a number (the | |
3767 | condition is true if the set of capturing parentheses named by the number | |
3768 | matched). | |
b45f050a | 3769 | |
7253e4e3 | 3770 | The <-- HERE shows in the regular expression about where the problem was |
b45f050a JF |
3771 | discovered. See L<perlre>. |
3772 | ||
6170680b IZ |
3773 | =item Unknown open() mode '%s' |
3774 | ||
437784d6 | 3775 | (F) The second argument of 3-argument open() is not among the list |
c47ff5f1 | 3776 | of valid modes: C<< < >>, C<< > >>, C<<< >> >>>, C<< +< >>, |
488dad83 | 3777 | C<< +> >>, C<<< +>> >>>, C<-|>, C<|->, C<< <& >>, C<< >& >>. |
6170680b | 3778 | |
f675dbe5 CB |
3779 | =item Unknown process %x sent message to prime_env_iter: %s |
3780 | ||
3781 | (P) An error peculiar to VMS. Perl was reading values for %ENV before | |
3782 | iterating over it, and someone else stuck a message in the stream of | |
3783 | data Perl expected. Someone's very confused, or perhaps trying to | |
3784 | subvert Perl's population of %ENV for nefarious purposes. | |
3785 | ||
3d1a39c8 RGS |
3786 | =item Unknown warnings category '%s' |
3787 | ||
3788 | (F) An error issued by the C<warnings> pragma. You specified a warnings | |
3789 | category that is unknown to perl at this point. | |
3790 | ||
3791 | Note that if you want to enable a warnings category registered by a module | |
3792 | (e.g. C<use warnings 'File::Find'>), you must have imported this module | |
3793 | first. | |
3794 | ||
7253e4e3 | 3795 | =item unmatched [ in regex; marked by <-- HERE in m/%s/ |
6df41af2 | 3796 | |
380a0633 | 3797 | (F) The brackets around a character class must match. If you wish to |
be771a83 | 3798 | include a closing bracket in a character class, backslash it or put it |
7253e4e3 RK |
3799 | first. The <-- HERE shows in the regular expression about where the problem |
3800 | was discovered. See L<perlre>. | |
6df41af2 | 3801 | |
7253e4e3 | 3802 | =item unmatched ( in regex; marked by <-- HERE in m/%s/ |
a0d0e21e LW |
3803 | |
3804 | (F) Unbackslashed parentheses must always be balanced in regular | |
7253e4e3 RK |
3805 | expressions. If you're a vi user, the % key is valuable for finding the |
3806 | matching parenthesis. The <-- HERE shows in the regular expression about | |
3807 | where the problem was discovered. See L<perlre>. | |
a0d0e21e | 3808 | |
d98d5fff | 3809 | =item Unmatched right %s bracket |
a0d0e21e | 3810 | |
be771a83 GS |
3811 | (F) The lexer counted more closing curly or square brackets than opening |
3812 | ones, so you're probably missing a matching opening bracket. As a | |
3813 | general rule, you'll find the missing one (so to speak) near the place | |
3814 | you were last editing. | |
a0d0e21e | 3815 | |
a0d0e21e LW |
3816 | =item Unquoted string "%s" may clash with future reserved word |
3817 | ||
be771a83 GS |
3818 | (W reserved) You used a bareword that might someday be claimed as a |
3819 | reserved word. It's best to put such a word in quotes, or capitalize it | |
3820 | somehow, or insert an underbar into it. You might also declare it as a | |
3821 | subroutine. | |
a0d0e21e | 3822 | |
54310121 | 3823 | =item Unrecognized character %s |
a0d0e21e | 3824 | |
54310121 | 3825 | (F) The Perl parser has no idea what to do with the specified character |
3826 | in your Perl script (or eval). Perhaps you tried to run a compressed | |
3827 | script, a binary program, or a directory as a Perl program. | |
a0d0e21e | 3828 | |
6df41af2 GS |
3829 | =item /%s/: Unrecognized escape \\%c in character class passed through |
3830 | ||
be771a83 GS |
3831 | (W regexp) You used a backslash-character combination which is not |
3832 | recognized by Perl inside character classes. The character was | |
3833 | understood literally. | |
6df41af2 | 3834 | |
5cd5c422 RB |
3835 | =item Unrecognized escape \\%c passed through in regex; |
3836 | ||
3837 | marked by <-- HERE in m/%s/ | |
6df41af2 | 3838 | |
be771a83 | 3839 | (W regexp) You used a backslash-character combination which is not |
b45f050a JF |
3840 | recognized by Perl. This combination appears in an interpolated variable or |
3841 | a C<'>-delimited regular expression. The character was understood | |
7253e4e3 RK |
3842 | literally. The <-- HERE shows in the regular expression about where the |
3843 | escape was discovered. | |
6df41af2 | 3844 | |
c9f97d15 IZ |
3845 | =item Unrecognized escape \\%c passed through |
3846 | ||
be771a83 GS |
3847 | (W misc) You used a backslash-character combination which is not |
3848 | recognized by Perl. | |
c9f97d15 | 3849 | |
a0d0e21e LW |
3850 | =item Unrecognized signal name "%s" |
3851 | ||
be771a83 GS |
3852 | (F) You specified a signal name to the kill() function that was not |
3853 | recognized. Say C<kill -l> in your shell to see the valid signal names | |
3854 | on your system. | |
a0d0e21e | 3855 | |
90248788 | 3856 | =item Unrecognized switch: -%s (-h will show valid options) |
a0d0e21e | 3857 | |
be771a83 GS |
3858 | (F) You specified an illegal option to Perl. Don't do that. (If you |
3859 | think you didn't do that, check the #! line to see if it's supplying the | |
3860 | bad switch on your behalf.) | |
a0d0e21e LW |
3861 | |
3862 | =item Unsuccessful %s on filename containing newline | |
3863 | ||
be771a83 GS |
3864 | (W newline) A file operation was attempted on a filename, and that |
3865 | operation failed, PROBABLY because the filename contained a newline, | |
5b3eff12 | 3866 | PROBABLY because you forgot to chomp() it off. See L<perlfunc/chomp>. |
a0d0e21e LW |
3867 | |
3868 | =item Unsupported directory function "%s" called | |
3869 | ||
3870 | (F) Your machine doesn't support opendir() and readdir(). | |
3871 | ||
6df41af2 GS |
3872 | =item Unsupported function %s |
3873 | ||
3874 | (F) This machine doesn't implement the indicated function, apparently. | |
3875 | At least, Configure doesn't think so. | |
3876 | ||
54310121 | 3877 | =item Unsupported function fork |
3878 | ||
3879 | (F) Your version of executable does not support forking. | |
3880 | ||
be771a83 GS |
3881 | Note that under some systems, like OS/2, there may be different flavors |
3882 | of Perl executables, some of which may support fork, some not. Try | |
3883 | changing the name you call Perl by to C<perl_>, C<perl__>, and so on. | |
54310121 | 3884 | |
b250498f GS |
3885 | =item Unsupported script encoding |
3886 | ||
3887 | (F) Your program file begins with a Unicode Byte Order Mark (BOM) which | |
3888 | declares it to be in a Unicode encoding that Perl cannot yet read. | |
3889 | ||
a0d0e21e LW |
3890 | =item Unsupported socket function "%s" called |
3891 | ||
3892 | (F) Your machine doesn't support the Berkeley socket mechanism, or at | |
3893 | least that's what Configure thought. | |
3894 | ||
6df41af2 | 3895 | =item Unterminated attribute list |
a0d0e21e | 3896 | |
be771a83 GS |
3897 | (F) The lexer found something other than a simple identifier at the |
3898 | start of an attribute, and it wasn't a semicolon or the start of a | |
3899 | block. Perhaps you terminated the parameter list of the previous | |
3900 | attribute too soon. See L<attributes>. | |
a0d0e21e | 3901 | |
09bef843 SB |
3902 | =item Unterminated attribute parameter in attribute list |
3903 | ||
be771a83 GS |
3904 | (F) The lexer saw an opening (left) parenthesis character while parsing |
3905 | an attribute list, but the matching closing (right) parenthesis | |
09bef843 SB |
3906 | character was not found. You may need to add (or remove) a backslash |
3907 | character to get your parentheses to balance. See L<attributes>. | |
3908 | ||
f1991046 GS |
3909 | =item Unterminated compressed integer |
3910 | ||
3911 | (F) An argument to unpack("w",...) was incompatible with the BER | |
3912 | compressed integer format and could not be converted to an integer. | |
3913 | See L<perlfunc/pack>. | |
3914 | ||
6df41af2 | 3915 | =item Unterminated <> operator |
09bef843 | 3916 | |
6df41af2 | 3917 | (F) The lexer saw a left angle bracket in a place where it was expecting |
be771a83 GS |
3918 | a term, so it's looking for the corresponding right angle bracket, and |
3919 | not finding it. Chances are you left some needed parentheses out | |
3920 | earlier in the line, and you really meant a "less than". | |
09bef843 | 3921 | |
6df41af2 | 3922 | =item untie attempted while %d inner references still exist |
a0d0e21e | 3923 | |
be771a83 GS |
3924 | (W untie) A copy of the object returned from C<tie> (or C<tied>) was |
3925 | still valid when C<untie> was called. | |
a0d0e21e | 3926 | |
5cd5c422 RB |
3927 | =item Useless (?%s) - use /%s modifier in regex; |
3928 | ||
3929 | marked by <-- HERE in m/%s/ | |
9d1d55b5 JP |
3930 | |
3931 | (W regexp) You have used an internal modifier such as (?o) that has no | |
3932 | meaning unless applied to the entire regexp: | |
3933 | ||
3934 | if ($string =~ /(?o)$pattern/) { ... } | |
3935 | ||
3936 | must be written as | |
3937 | ||
3938 | if ($string =~ /$pattern/o) { ... } | |
3939 | ||
3940 | The <-- HERE shows in the regular expression about | |
3941 | where the problem was discovered. See L<perlre>. | |
3942 | ||
5cd5c422 RB |
3943 | =item Useless (?-%s) - don't use /%s modifier in regex; |
3944 | ||
3945 | marked by <-- HERE in m/%s/ | |
9d1d55b5 JP |
3946 | |
3947 | (W regexp) You have used an internal modifier such as (?-o) that has no | |
3948 | meaning unless removed from the entire regexp: | |
3949 | ||
3950 | if ($string =~ /(?-o)$pattern/o) { ... } | |
3951 | ||
3952 | must be written as | |
3953 | ||
3954 | if ($string =~ /$pattern/) { ... } | |
3955 | ||
3956 | The <-- HERE shows in the regular expression about | |
3957 | where the problem was discovered. See L<perlre>. | |
3958 | ||
6df41af2 | 3959 | =item Useless use of %s in void context |
a0d0e21e | 3960 | |
75b44862 | 3961 | (W void) You did something without a side effect in a context that does |
be771a83 GS |
3962 | nothing with the return value, such as a statement that doesn't return a |
3963 | value from a block, or the left side of a scalar comma operator. Very | |
3964 | often this points not to stupidity on your part, but a failure of Perl | |
3965 | to parse your program the way you thought it would. For example, you'd | |
3966 | get this if you mixed up your C precedence with Python precedence and | |
3967 | said | |
a0d0e21e | 3968 | |
6df41af2 | 3969 | $one, $two = 1, 2; |
748a9306 | 3970 | |
6df41af2 GS |
3971 | when you meant to say |
3972 | ||
3973 | ($one, $two) = (1, 2); | |
3974 | ||
3975 | Another common error is to use ordinary parentheses to construct a list | |
3976 | reference when you should be using square or curly brackets, for | |
3977 | example, if you say | |
3978 | ||
3979 | $array = (1,2); | |
3980 | ||
3981 | when you should have said | |
3982 | ||
3983 | $array = [1,2]; | |
3984 | ||
3985 | The square brackets explicitly turn a list value into a scalar value, | |
3986 | while parentheses do not. So when a parenthesized list is evaluated in | |
3987 | a scalar context, the comma is treated like C's comma operator, which | |
3988 | throws away the left argument, which is not what you want. See | |
3989 | L<perlref> for more on this. | |
3990 | ||
65191a1e BS |
3991 | This warning will not be issued for numerical constants equal to 0 or 1 |
3992 | since they are often used in statements like | |
3993 | ||
3994 | 1 while sub_with_side_effects() ; | |
3995 | ||
3996 | String constants that would normally evaluate to 0 or 1 are warned | |
3997 | about. | |
3998 | ||
6df41af2 GS |
3999 | =item Useless use of "re" pragma |
4000 | ||
4001 | (W) You did C<use re;> without any arguments. That isn't very useful. | |
4002 | ||
a801c63c RGS |
4003 | =item Useless use of sort in scalar context |
4004 | ||
4005 | (W void) You used sort in scalar context, as in : | |
4006 | ||
4007 | my $x = sort @y; | |
4008 | ||
4009 | This is not very useful, and perl currently optimizes this away. | |
4010 | ||
de4864e4 JH |
4011 | =item Useless use of %s with no values |
4012 | ||
f87c3213 | 4013 | (W syntax) You used the push() or unshift() function with no arguments |
de4864e4 JH |
4014 | apart from the array, like C<push(@x)> or C<unshift(@foo)>. That won't |
4015 | usually have any effect on the array, so is completely useless. It's | |
4016 | possible in principle that push(@tied_array) could have some effect | |
4017 | if the array is tied to a class which implements a PUSH method. If so, | |
4018 | you can write it as C<push(@tied_array,())> to avoid this warning. | |
4019 | ||
6df41af2 GS |
4020 | =item "use" not allowed in expression |
4021 | ||
be771a83 GS |
4022 | (F) The "use" keyword is recognized and executed at compile time, and |
4023 | returns no useful value. See L<perlmod>. | |
748a9306 | 4024 | |
c47ff5f1 | 4025 | =item Use of bare << to mean <<"" is deprecated |
4633a7c4 | 4026 | |
be771a83 GS |
4027 | (D deprecated) You are now encouraged to use the explicitly quoted form |
4028 | if you wish to use an empty line as the terminator of the here-document. | |
4633a7c4 | 4029 | |
64e578a2 MJD |
4030 | =item Use of /c modifier is meaningless in s/// |
4031 | ||
4032 | (W regexp) You used the /c modifier in a substitution. The /c | |
4033 | modifier is not presently meaningful in substitutions. | |
4034 | ||
4ac733c9 MJD |
4035 | =item Use of /c modifier is meaningless without /g |
4036 | ||
4037 | (W regexp) You used the /c modifier with a regex operand, but didn't | |
4038 | use the /g modifier. Currently, /c is meaningful only when /g is | |
4039 | used. (This may change in the future.) | |
4040 | ||
f34840d8 MJD |
4041 | =item Use of /g modifier is meaningless in split |
4042 | ||
4043 | (W regexp) You used the /g modifier on the pattern for a C<split> | |
4044 | operator. Since C<split> always tries to match the pattern | |
4045 | repeatedly, the C</g> has no effect. | |
4046 | ||
39b99f21 | 4047 | =item Use of *glob{FILEHANDLE} is deprecated |
4048 | ||
4049 | (D deprecated) You are now encouraged to use the shorter *glob{IO} form | |
4050 | to access the filehandle slot within a typeglob. | |
4051 | ||
35ae6b54 MS |
4052 | =item Use of chdir('') or chdir(undef) as chdir() deprecated |
4053 | ||
4054 | (D deprecated) chdir() with no arguments is documented to change to | |
4055 | $ENV{HOME} or $ENV{LOGDIR}. chdir(undef) and chdir('') share this | |
4056 | behavior, but that has been deprecated. In future versions they | |
4057 | will simply fail. | |
4058 | ||
4059 | Be careful to check that what you pass to chdir() is defined and not | |
4060 | blank, else you might find yourself in your home directory. | |
4061 | ||
a0d0e21e LW |
4062 | =item Use of implicit split to @_ is deprecated |
4063 | ||
be771a83 GS |
4064 | (D deprecated) It makes a lot of work for the compiler when you clobber |
4065 | a subroutine's argument list, so it's better if you assign the results | |
4066 | of a split() explicitly to an array (or list). | |
a0d0e21e | 4067 | |
dc848c6f | 4068 | =item Use of inherited AUTOLOAD for non-method %s() is deprecated |
4069 | ||
be771a83 GS |
4070 | (D deprecated) As an (ahem) accidental feature, C<AUTOLOAD> subroutines |
4071 | are looked up as methods (using the C<@ISA> hierarchy) even when the | |
4072 | subroutines to be autoloaded were called as plain functions (e.g. | |
4073 | C<Foo::bar()>), not as methods (e.g. C<< Foo->bar() >> or C<< | |
4074 | $obj->bar() >>). | |
dc848c6f | 4075 | |
be771a83 GS |
4076 | This bug will be rectified in future by using method lookup only for |
4077 | methods' C<AUTOLOAD>s. However, there is a significant base of existing | |
4078 | code that may be using the old behavior. So, as an interim step, Perl | |
4079 | currently issues an optional warning when non-methods use inherited | |
4080 | C<AUTOLOAD>s. | |
dc848c6f | 4081 | |
4082 | The simple rule is: Inheritance will not work when autoloading | |
be771a83 GS |
4083 | non-methods. The simple fix for old code is: In any module that used |
4084 | to depend on inheriting C<AUTOLOAD> for non-methods from a base class | |
4085 | named C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during | |
4086 | startup. | |
dc848c6f | 4087 | |
be771a83 GS |
4088 | In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> |
4089 | you should remove AutoLoader from @ISA and change C<use AutoLoader;> to | |
7b8d334a | 4090 | C<use AutoLoader 'AUTOLOAD';>. |
fb73857a | 4091 | |
5d3e98de RGS |
4092 | =item Use of -l on filehandle %s |
4093 | ||
4094 | (W io) A filehandle represents an opened file, and when you opened the file | |
4095 | it already went past any symlink you are presumably trying to look for. | |
4096 | The operation returned C<undef>. Use a filename instead. | |
4097 | ||
f2c0fa37 RH |
4098 | =item Use of "package" with no arguments is deprecated |
4099 | ||
4100 | (D deprecated) You used the C<package> keyword without specifying a package | |
4101 | name. So no namespace is current at all. Using this can cause many | |
4102 | otherwise reasonable constructs to fail in baffling ways. C<use strict;> | |
4103 | instead. | |
4104 | ||
6df41af2 GS |
4105 | =item Use of %s in printf format not supported |
4106 | ||
4107 | (F) You attempted to use a feature of printf that is accessible from | |
4108 | only C. This usually means there's a better way to do it in Perl. | |
4109 | ||
4110 | =item Use of $* is deprecated | |
4111 | ||
be771a83 GS |
4112 | (D deprecated) This variable magically turned on multi-line pattern |
4113 | matching, both for you and for any luckless subroutine that you happen | |
4114 | to call. You should use the new C<//m> and C<//s> modifiers now to do | |
4115 | that without the dangerous action-at-a-distance effects of C<$*>. | |
6df41af2 GS |
4116 | |
4117 | =item Use of %s is deprecated | |
4118 | ||
75b44862 | 4119 | (D deprecated) The construct indicated is no longer recommended for use, |
be771a83 GS |
4120 | generally because there's a better way to do it, and also because the |
4121 | old way has bad side effects. | |
6df41af2 GS |
4122 | |
4123 | =item Use of $# is deprecated | |
4124 | ||
be771a83 GS |
4125 | (D deprecated) This was an ill-advised attempt to emulate a poorly |
4126 | defined B<awk> feature. Use an explicit printf() or sprintf() instead. | |
6df41af2 | 4127 | |
1f1cc344 | 4128 | =item Use of reference "%s" as array index |
d804643f | 4129 | |
77b96956 | 4130 | (W misc) You tried to use a reference as an array index; this probably |
1f1cc344 JH |
4131 | isn't what you mean, because references in numerical context tend |
4132 | to be huge numbers, and so usually indicates programmer error. | |
d804643f | 4133 | |
64977eb6 | 4134 | If you really do mean it, explicitly numify your reference, like so: |
1f1cc344 JH |
4135 | C<$array[0+$ref]>. This warning is not given for overloaded objects, |
4136 | either, because you can overload the numification and stringification | |
4137 | operators and then you assumedly know what you are doing. | |
d804643f | 4138 | |
85b81015 LW |
4139 | =item Use of reserved word "%s" is deprecated |
4140 | ||
be771a83 GS |
4141 | (D deprecated) The indicated bareword is a reserved word. Future |
4142 | versions of perl may use it as a keyword, so you're better off either | |
4143 | explicitly quoting the word in a manner appropriate for its context of | |
4144 | use, or using a different name altogether. The warning can be | |
4145 | suppressed for subroutine names by either adding a C<&> prefix, or using | |
4146 | a package qualifier, e.g. C<&our()>, or C<Foo::our()>. | |
85b81015 | 4147 | |
bbd7eb8a RD |
4148 | =item Use of tainted arguments in %s is deprecated |
4149 | ||
159f47d9 | 4150 | (W taint, deprecated) You have supplied C<system()> or C<exec()> with multiple |
bbd7eb8a RD |
4151 | arguments and at least one of them is tainted. This used to be allowed |
4152 | but will become a fatal error in a future version of perl. Untaint your | |
4153 | arguments. See L<perlsec>. | |
4154 | ||
cc95b072 | 4155 | =item Use of uninitialized value%s |
a0d0e21e | 4156 | |
be771a83 GS |
4157 | (W uninitialized) An undefined value was used as if it were already |
4158 | defined. It was interpreted as a "" or a 0, but maybe it was a mistake. | |
4159 | To suppress this warning assign a defined value to your variables. | |
a0d0e21e | 4160 | |
e5be4a53 GS |
4161 | To help you figure out what was undefined, perl tells you what operation |
4162 | you used the undefined value in. Note, however, that perl optimizes your | |
4163 | program and the operation displayed in the warning may not necessarily | |
4164 | appear literally in your program. For example, C<"that $foo"> is | |
4165 | usually optimized into C<"that " . $foo>, and the warning will refer to | |
4166 | the C<concatenation (.)> operator, even though there is no C<.> in your | |
4167 | program. | |
4168 | ||
a1063b2d RH |
4169 | =item Using a hash as a reference is deprecated |
4170 | ||
496a33f5 | 4171 | (D deprecated) You tried to use a hash as a reference, as in |
1b1f1335 NIS |
4172 | C<< %foo->{"bar"} >> or C<< %$ref->{"hello"} >>. Versions of perl <= 5.6.1 |
4173 | used to allow this syntax, but shouldn't have. It is now deprecated, and will | |
496a33f5 | 4174 | be removed in a future version. |
a1063b2d RH |
4175 | |
4176 | =item Using an array as a reference is deprecated | |
4177 | ||
496a33f5 | 4178 | (D deprecated) You tried to use an array as a reference, as in |
1b1f1335 NIS |
4179 | C<< @foo->[23] >> or C<< @$ref->[99] >>. Versions of perl <= 5.6.1 used to |
4180 | allow this syntax, but shouldn't have. It is now deprecated, and will be | |
496a33f5 | 4181 | removed in a future version. |
a1063b2d | 4182 | |
9466bab6 JH |
4183 | =item UTF-16 surrogate %s |
4184 | ||
507b9800 JH |
4185 | (W utf8) You tried to generate half of an UTF-16 surrogate by |
4186 | requesting a Unicode character between the code points 0xD800 and | |
4187 | 0xDFFF (inclusive). That range is reserved exclusively for the use of | |
4188 | UTF-16 encoding (by having two 16-bit UCS-2 characters); but Perl | |
4189 | encodes its characters in UTF-8, so what you got is a very illegal | |
4190 | character. If you really know what you are doing you can turn off | |
4191 | this warning by C<no warnings 'utf8';>. | |
9466bab6 | 4192 | |
68dc0745 | 4193 | =item Value of %s can be "0"; test with defined() |
a6006777 | 4194 | |
75b44862 | 4195 | (W misc) In a conditional expression, you used <HANDLE>, <*> (glob), |
be771a83 GS |
4196 | C<each()>, or C<readdir()> as a boolean value. Each of these constructs |
4197 | can return a value of "0"; that would make the conditional expression | |
4198 | false, which is probably not what you intended. When using these | |
4199 | constructs in conditional expressions, test their values with the | |
4200 | C<defined> operator. | |
a6006777 | 4201 | |
f675dbe5 CB |
4202 | =item Value of CLI symbol "%s" too long |
4203 | ||
be771a83 GS |
4204 | (W misc) A warning peculiar to VMS. Perl tried to read the value of an |
4205 | %ENV element from a CLI symbol table, and found a resultant string | |
4206 | longer than 1024 characters. The return value has been truncated to | |
4207 | 1024 characters. | |
f675dbe5 | 4208 | |
9607fc9c | 4209 | =item Variable "%s" is not imported%s |
4633a7c4 | 4210 | |
be771a83 GS |
4211 | (F) While "use strict" in effect, you referred to a global variable that |
4212 | you apparently thought was imported from another module, because | |
4213 | something else of the same name (usually a subroutine) is exported by | |
4214 | that module. It usually means you put the wrong funny character on the | |
4215 | front of your variable. | |
4633a7c4 | 4216 | |
6df41af2 GS |
4217 | =item "%s" variable %s masks earlier declaration in same %s |
4218 | ||
be771a83 GS |
4219 | (W misc) A "my" or "our" variable has been redeclared in the current |
4220 | scope or statement, effectively eliminating all access to the previous | |
4221 | instance. This is almost always a typographical error. Note that the | |
4222 | earlier variable will still exist until the end of the scope or until | |
4223 | all closure referents to it are destroyed. | |
6df41af2 | 4224 | |
44a8e56a | 4225 | =item Variable "%s" may be unavailable |
4226 | ||
be771a83 GS |
4227 | (W closure) An inner (nested) I<anonymous> subroutine is inside a |
4228 | I<named> subroutine, and outside that is another subroutine; and the | |
4229 | anonymous (innermost) subroutine is referencing a lexical variable | |
4230 | defined in the outermost subroutine. For example: | |
44a8e56a | 4231 | |
4232 | sub outermost { my $a; sub middle { sub { $a } } } | |
4233 | ||
4234 | If the anonymous subroutine is called or referenced (directly or | |
be771a83 GS |
4235 | indirectly) from the outermost subroutine, it will share the variable as |
4236 | you would expect. But if the anonymous subroutine is called or | |
4237 | referenced when the outermost subroutine is not active, it will see the | |
4238 | value of the shared variable as it was before and during the *first* | |
4239 | call to the outermost subroutine, which is probably not what you want. | |
4240 | ||
4241 | In these circumstances, it is usually best to make the middle subroutine | |
4242 | anonymous, using the C<sub {}> syntax. Perl has specific support for | |
4243 | shared variables in nested anonymous subroutines; a named subroutine in | |
4244 | between interferes with this feature. | |
44a8e56a | 4245 | |
6df41af2 GS |
4246 | =item Variable syntax |
4247 | ||
4248 | (A) You've accidentally run your script through B<csh> instead | |
4249 | of Perl. Check the #! line, or manually feed your script into | |
4250 | Perl yourself. | |
4251 | ||
44a8e56a | 4252 | =item Variable "%s" will not stay shared |
4253 | ||
be771a83 GS |
4254 | (W closure) An inner (nested) I<named> subroutine is referencing a |
4255 | lexical variable defined in an outer subroutine. | |
44a8e56a | 4256 | |
4257 | When the inner subroutine is called, it will probably see the value of | |
be771a83 GS |
4258 | the outer subroutine's variable as it was before and during the *first* |
4259 | call to the outer subroutine; in this case, after the first call to the | |
4260 | outer subroutine is complete, the inner and outer subroutines will no | |
4261 | longer share a common value for the variable. In other words, the | |
4262 | variable will no longer be shared. | |
44a8e56a | 4263 | |
4264 | Furthermore, if the outer subroutine is anonymous and references a | |
4265 | lexical variable outside itself, then the outer and inner subroutines | |
4266 | will I<never> share the given variable. | |
4267 | ||
4268 | This problem can usually be solved by making the inner subroutine | |
4269 | anonymous, using the C<sub {}> syntax. When inner anonymous subs that | |
be771a83 GS |
4270 | reference variables in outer subroutines are called or referenced, they |
4271 | are automatically rebound to the current values of such variables. | |
44a8e56a | 4272 | |
5cd5c422 RB |
4273 | =item Variable length lookbehind not implemented in regex; |
4274 | ||
4275 | marked by <-- HERE in m/%s/ | |
b45f050a JF |
4276 | |
4277 | (F) Lookbehind is allowed only for subexpressions whose length is fixed and | |
7253e4e3 RK |
4278 | known at compile time. The <-- HERE shows in the regular expression about |
4279 | where the problem was discovered. See L<perlre>. | |
b45f050a | 4280 | |
084610c0 GS |
4281 | =item Version number must be a constant number |
4282 | ||
4283 | (P) The attempt to translate a C<use Module n.n LIST> statement into | |
4284 | its equivalent C<BEGIN> block found an internal inconsistency with | |
4285 | the version number. | |
4286 | ||
68d932c8 JH |
4287 | =item v-string in use/require is non-portable |
4288 | ||
77b96956 | 4289 | (W portable) The use of v-strings is non-portable to older, pre-5.6, Perls. |
68d932c8 JH |
4290 | If you want your scripts to be backward portable, use the floating |
4291 | point version number: for example, instead of C<use 5.6.1> say | |
4292 | C<use 5.006_001>. This of course won't help: the older Perls | |
4293 | won't suddenly start understanding newer features, but at least | |
4294 | they will show a sensible error message indicating the required | |
4295 | minimum version. | |
4296 | ||
7e1af8bc | 4297 | =item Warning: something's wrong |
5f05dabc | 4298 | |
4299 | (W) You passed warn() an empty string (the equivalent of C<warn "">) or | |
4300 | you called it with no args and C<$_> was empty. | |
4301 | ||
f86702cc | 4302 | =item Warning: unable to close filehandle %s properly |
a0d0e21e | 4303 | |
be771a83 GS |
4304 | (S) The implicit close() done by an open() got an error indication on |
4305 | the close(). This usually indicates your file system ran out of disk | |
4306 | space. | |
a0d0e21e | 4307 | |
5f05dabc | 4308 | =item Warning: Use of "%s" without parentheses is ambiguous |
a0d0e21e | 4309 | |
be771a83 GS |
4310 | (S ambiguous) You wrote a unary operator followed by something that |
4311 | looks like a binary operator that could also have been interpreted as a | |
4312 | term or unary operator. For instance, if you know that the rand | |
4313 | function has a default argument of 1.0, and you write | |
a0d0e21e LW |
4314 | |
4315 | rand + 5; | |
4316 | ||
4317 | you may THINK you wrote the same thing as | |
4318 | ||
4319 | rand() + 5; | |
4320 | ||
4321 | but in actual fact, you got | |
4322 | ||
4323 | rand(+5); | |
4324 | ||
5f05dabc | 4325 | So put in parentheses to say what you really mean. |
a0d0e21e | 4326 | |
4b3603a4 JH |
4327 | =item Wide character in %s |
4328 | ||
62961d2e JH |
4329 | (W utf8) Perl met a wide character (>255) when it wasn't expecting |
4330 | one. This warning is by default on for I/O (like print) but can be | |
4331 | turned off by C<no warnings 'utf8';>. You are supposed to explicitly | |
4332 | mark the filehandle with an encoding, see L<open> and L<perlfunc/binmode>. | |
4b3603a4 | 4333 | |
9a7dcd9c | 4334 | =item write() on closed filehandle %s |
a0d0e21e | 4335 | |
be771a83 | 4336 | (W closed) The filehandle you're writing to got itself closed sometime |
c289d2f7 | 4337 | before now. Check your control flow. |
a0d0e21e LW |
4338 | |
4339 | =item X outside of string | |
4340 | ||
4341 | (F) You had a pack template that specified a relative position before | |
4342 | the beginning of the string being unpacked. See L<perlfunc/pack>. | |
4343 | ||
4344 | =item x outside of string | |
4345 | ||
4346 | (F) You had a pack template that specified a relative position after | |
4347 | the end of the string being unpacked. See L<perlfunc/pack>. | |
4348 | ||
4349 | =item Xsub "%s" called in sort | |
4350 | ||
be771a83 GS |
4351 | (F) The use of an external subroutine as a sort comparison is not yet |
4352 | supported. | |
a0d0e21e LW |
4353 | |
4354 | =item Xsub called in sort | |
4355 | ||
be771a83 GS |
4356 | (F) The use of an external subroutine as a sort comparison is not yet |
4357 | supported. | |
a0d0e21e | 4358 | |
a0d0e21e LW |
4359 | =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! |
4360 | ||
5f05dabc | 4361 | (F) And you probably never will, because you probably don't have the |
a0d0e21e | 4362 | sources to your kernel, and your vendor probably doesn't give a rip |
1b1f1335 | 4363 | about what you want. Your best bet is to put a setuid C wrapper around |
496a33f5 | 4364 | your script. |
a0d0e21e LW |
4365 | |
4366 | =item You need to quote "%s" | |
4367 | ||
be771a83 GS |
4368 | (W syntax) You assigned a bareword as a signal handler name. |
4369 | Unfortunately, you already have a subroutine of that name declared, | |
4370 | which means that Perl 5 will try to call the subroutine when the | |
4371 | assignment is executed, which is probably not what you want. (If it IS | |
4372 | what you want, put an & in front.) | |
a0d0e21e | 4373 | |
a0d0e21e LW |
4374 | =back |
4375 | ||
56e90b21 | 4376 | =cut |