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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). | |
12 | (S) A severe warning (default). | |
13 | (F) A fatal error (trappable). | |
14 | (P) An internal error you should never see (trappable). | |
15 | (X) A very fatal error (nontrappable). | |
16 | (A) An alien error message (not generated by Perl). | |
17 | ||
18 | The majority of messages from the first three classifications above | |
19 | (W, D & S) can be controlled using the C<warnings> pragma. | |
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. | |
32 | ||
33 | Trappable errors may be trapped using the eval operator. See | |
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>. | |
37 | ||
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. | |
44 | ||
45 | =over 4 | |
46 | ||
47 | =item accept() on closed socket %s | |
48 | ||
49 | (W closed) You tried to do an accept on a closed socket. Did you forget | |
50 | to check the return value of your socket() call? See | |
51 | L<perlfunc/accept>. | |
52 | ||
53 | =item Allocation too large: %lx | |
54 | ||
55 | (X) You can't allocate more than 64K on an MS-DOS machine. | |
56 | ||
57 | =item '!' allowed only after types %s | |
58 | ||
59 | (F) The '!' is allowed in pack() or unpack() only after certain types. | |
60 | See L<perlfunc/pack>. | |
61 | ||
62 | =item Ambiguous call resolved as CORE::%s(), qualify as such or use & | |
63 | ||
64 | (W ambiguous) A subroutine you have declared has the same name as a Perl | |
65 | keyword, and you have used the name without qualification for calling | |
66 | one or the other. Perl decided to call the builtin because the | |
67 | subroutine is not imported. | |
68 | ||
69 | To force interpretation as a subroutine call, either put an ampersand | |
70 | before the subroutine name, or qualify the name with its package. | |
71 | Alternatively, you can import the subroutine (or pretend that it's | |
72 | imported with the C<use subs> pragma). | |
73 | ||
74 | To silently interpret it as the Perl operator, use the C<CORE::> prefix | |
75 | on the operator (e.g. C<CORE::log($x)>) or declare the subroutine | |
76 | to be an object method (see L<perlsub/"Subroutine Attributes"> or | |
77 | L<attributes>). | |
78 | ||
79 | =item Ambiguous range in transliteration operator | |
80 | ||
81 | (F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at | |
82 | all. To include a C<-> character in a transliteration, put it either | |
83 | first or last. (In the past, C<tr/a-z-0//> was synonymous with | |
84 | C<tr/a-y//>, which was probably not what you would have expected.) | |
85 | ||
86 | =item Ambiguous use of %s resolved as %s | |
87 | ||
88 | (W ambiguous)(S) You said something that may not be interpreted the way | |
89 | you thought. Normally it's pretty easy to disambiguate it by supplying | |
90 | a missing quote, operator, parenthesis pair or declaration. | |
91 | ||
92 | =item '|' and '<' may not both be specified on command line | |
93 | ||
94 | (F) An error peculiar to VMS. Perl does its own command line | |
95 | redirection, and found that STDIN was a pipe, and that you also tried to | |
96 | redirect STDIN using '<'. Only one STDIN stream to a customer, please. | |
97 | ||
98 | =item '|' and '>' may not both be specified on command line | |
99 | ||
100 | (F) An error peculiar to VMS. Perl does its own command line | |
101 | redirection, and thinks you tried to redirect stdout both to a file and | |
102 | into a pipe to another command. You need to choose one or the other, | |
103 | though nothing's stopping you from piping into a program or Perl script | |
104 | which 'splits' output into two streams, such as | |
105 | ||
106 | open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!"; | |
107 | while (<STDIN>) { | |
108 | print; | |
109 | print OUT; | |
110 | } | |
111 | close OUT; | |
112 | ||
113 | =item Applying %s to %s will act on scalar(%s) | |
114 | ||
115 | (W misc) The pattern match (C<//>), substitution (C<s///>), and | |
116 | transliteration (C<tr///>) operators work on scalar values. If you apply | |
117 | one of them to an array or a hash, it will convert the array or hash to | |
118 | a scalar value -- the length of an array, or the population info of a | |
119 | hash -- and then work on that scalar value. This is probably not what | |
120 | you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for | |
121 | alternatives. | |
122 | ||
123 | =item Args must match #! line | |
124 | ||
125 | (F) The setuid emulator requires that the arguments Perl was invoked | |
126 | with match the arguments specified on the #! line. Since some systems | |
127 | impose a one-argument limit on the #! line, try combining switches; | |
128 | for example, turn C<-w -U> into C<-wU>. | |
129 | ||
130 | =item Arg too short for msgsnd | |
131 | ||
132 | (F) msgsnd() requires a string at least as long as sizeof(long). | |
133 | ||
134 | =item %s argument is not a HASH or ARRAY element | |
135 | ||
136 | (F) The argument to exists() must be a hash or array element, such as: | |
137 | ||
138 | $foo{$bar} | |
139 | $ref->{"susie"}[12] | |
140 | ||
141 | =item %s argument is not a HASH or ARRAY element or slice | |
142 | ||
143 | (F) The argument to delete() must be either a hash or array element, | |
144 | such as: | |
145 | ||
146 | $foo{$bar} | |
147 | $ref->{"susie"}[12] | |
148 | ||
149 | or a hash or array slice, such as: | |
150 | ||
151 | @foo[$bar, $baz, $xyzzy] | |
152 | @{$ref->[12]}{"susie", "queue"} | |
153 | ||
154 | =item %s argument is not a subroutine name | |
155 | ||
156 | (F) The argument to exists() for C<exists &sub> must be a subroutine | |
157 | name, and not a subroutine call. C<exists &sub()> will generate this | |
158 | error. | |
159 | ||
160 | =item Argument "%s" isn't numeric%s | |
161 | ||
162 | (W numeric) The indicated string was fed as an argument to an operator | |
163 | that expected a numeric value instead. If you're fortunate the message | |
164 | will identify which operator was so unfortunate. | |
165 | ||
166 | =item Argument list not closed for PerlIO layer "%s" | |
167 | ||
168 | (W layer) When pushing a layer with arguments onto the Perl I/O system you | |
169 | forgot the ) that closes the argument list. (Layers take care of transforming | |
170 | data between external and internal representations.) Perl stopped parsing | |
171 | the layer list at this point and did not attempt to push this layer. | |
172 | If your program didn't explicitly request the failing operation, it may be | |
173 | the result of the value of the environment variable PERLIO. | |
174 | ||
175 | =item Array @%s missing the @ in argument %d of %s() | |
176 | ||
177 | (D deprecated) Really old Perl let you omit the @ on array names in some | |
178 | spots. This is now heavily deprecated. | |
179 | ||
180 | =item assertion botched: %s | |
181 | ||
182 | (P) The malloc package that comes with Perl had an internal failure. | |
183 | ||
184 | =item Assertion failed: file "%s" | |
185 | ||
186 | (P) A general assertion failed. The file in question must be examined. | |
187 | ||
188 | =item Assignment to both a list and a scalar | |
189 | ||
190 | (F) If you assign to a conditional operator, the 2nd and 3rd arguments | |
191 | must either both be scalars or both be lists. Otherwise Perl won't | |
192 | know which context to supply to the right side. | |
193 | ||
194 | =item A thread exited while %d threads were running | |
195 | ||
196 | (W threads)(S) When using threaded Perl, a thread (not necessarily the main | |
197 | thread) exited while there were still other threads running. | |
198 | Usually it's a good idea to first collect the return values of the | |
199 | created threads by joining them, and only then exit from the main | |
200 | thread. See L<threads>. | |
201 | ||
202 | =item Attempt to access disallowed key '%s' in a restricted hash | |
203 | ||
204 | (F) The failing code has attempted to get or set a key which is not in | |
205 | the current set of allowed keys of a restricted hash. | |
206 | ||
207 | =item Attempt to bless into a reference | |
208 | ||
209 | (F) The CLASSNAME argument to the bless() operator is expected to be | |
210 | the name of the package to bless the resulting object into. You've | |
211 | supplied instead a reference to something: perhaps you wrote | |
212 | ||
213 | bless $self, $proto; | |
214 | ||
215 | when you intended | |
216 | ||
217 | bless $self, ref($proto) || $proto; | |
218 | ||
219 | If you actually want to bless into the stringified version | |
220 | of the reference supplied, you need to stringify it yourself, for | |
221 | example by: | |
222 | ||
223 | bless $self, "$proto"; | |
224 | ||
225 | =item Attempt to delete disallowed key '%s' from a restricted hash | |
226 | ||
227 | (F) The failing code attempted to delete from a restricted hash a key | |
228 | which is not in its key set. | |
229 | ||
230 | =item Attempt to delete readonly key '%s' from a restricted hash | |
231 | ||
232 | (F) The failing code attempted to delete a key whose value has been | |
233 | declared readonly from a restricted hash. | |
234 | ||
235 | =item Attempt to free non-arena SV: 0x%lx | |
236 | ||
237 | (P internal) All SV objects are supposed to be allocated from arenas | |
238 | that will be garbage collected on exit. An SV was discovered to be | |
239 | outside any of those arenas. | |
240 | ||
241 | =item Attempt to free nonexistent shared string | |
242 | ||
243 | (P internal) Perl maintains a reference counted internal table of | |
244 | strings to optimize the storage and access of hash keys and other | |
245 | strings. This indicates someone tried to decrement the reference count | |
246 | of a string that can no longer be found in the table. | |
247 | ||
248 | =item Attempt to free temp prematurely | |
249 | ||
250 | (W debugging) Mortalized values are supposed to be freed by the | |
251 | free_tmps() routine. This indicates that something else is freeing the | |
252 | SV before the free_tmps() routine gets a chance, which means that the | |
253 | free_tmps() routine will be freeing an unreferenced scalar when it does | |
254 | try to free it. | |
255 | ||
256 | =item Attempt to free unreferenced glob pointers | |
257 | ||
258 | (P internal) The reference counts got screwed up on symbol aliases. | |
259 | ||
260 | =item Attempt to free unreferenced scalar | |
261 | ||
262 | (W internal) Perl went to decrement the reference count of a scalar to | |
263 | see if it would go to 0, and discovered that it had already gone to 0 | |
264 | earlier, and should have been freed, and in fact, probably was freed. | |
265 | This could indicate that SvREFCNT_dec() was called too many times, or | |
266 | that SvREFCNT_inc() was called too few times, or that the SV was | |
267 | mortalized when it shouldn't have been, or that memory has been | |
268 | corrupted. | |
269 | ||
270 | =item Attempt to join self | |
271 | ||
272 | (F) You tried to join a thread from within itself, which is an | |
273 | impossible task. You may be joining the wrong thread, or you may need | |
274 | to move the join() to some other thread. | |
275 | ||
276 | =item Attempt to pack pointer to temporary value | |
277 | ||
278 | (W pack) You tried to pass a temporary value (like the result of a | |
279 | function, or a computed expression) to the "p" pack() template. This | |
280 | means the result contains a pointer to a location that could become | |
281 | invalid anytime, even before the end of the current statement. Use | |
282 | literals or global values as arguments to the "p" pack() template to | |
283 | avoid this warning. | |
284 | ||
285 | =item Attempt to set length of freed array | |
286 | ||
287 | (W) You tried to set the length of an array which has been freed. You | |
288 | can do this by storing a reference to the scalar representing the last index | |
289 | of an array and later assigning through that reference. For example | |
290 | ||
291 | $r = do {my @a; \$#a}; | |
292 | $$r = 503 | |
293 | ||
294 | =item Attempt to use reference as lvalue in substr | |
295 | ||
296 | (W substr) You supplied a reference as the first argument to substr() | |
297 | used as an lvalue, which is pretty strange. Perhaps you forgot to | |
298 | dereference it first. See L<perlfunc/substr>. | |
299 | ||
300 | =item Bad arg length for %s, is %d, should be %s | |
301 | ||
302 | (F) You passed a buffer of the wrong size to one of msgctl(), semctl() | |
303 | or shmctl(). In C parlance, the correct sizes are, respectively, | |
304 | S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and | |
305 | S<sizeof(struct shmid_ds *)>. | |
306 | ||
307 | =item Bad evalled substitution pattern | |
308 | ||
309 | (F) You've used the C</e> switch to evaluate the replacement for a | |
310 | substitution, but perl found a syntax error in the code to evaluate, | |
311 | most likely an unexpected right brace '}'. | |
312 | ||
313 | =item Bad filehandle: %s | |
314 | ||
315 | (F) A symbol was passed to something wanting a filehandle, but the | |
316 | symbol has no filehandle associated with it. Perhaps you didn't do an | |
317 | open(), or did it in another package. | |
318 | ||
319 | =item Bad free() ignored | |
320 | ||
321 | (S malloc) An internal routine called free() on something that had never | |
322 | been malloc()ed in the first place. Mandatory, but can be disabled by | |
323 | setting environment variable C<PERL_BADFREE> to 0. | |
324 | ||
325 | This message can be seen quite often with DB_File on systems with "hard" | |
326 | dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB> | |
327 | which is left unnoticed if C<DB> uses I<forgiving> system malloc(). | |
328 | ||
329 | =item Bad hash | |
330 | ||
331 | (P) One of the internal hash routines was passed a null HV pointer. | |
332 | ||
333 | =item Bad index while coercing array into hash | |
334 | ||
335 | (F) The index looked up in the hash found as the 0'th element of a | |
336 | pseudo-hash is not legal. Index values must be at 1 or greater. | |
337 | See L<perlref>. | |
338 | ||
339 | =item Badly placed ()'s | |
340 | ||
341 | (A) You've accidentally run your script through B<csh> instead | |
342 | of Perl. Check the #! line, or manually feed your script into | |
343 | Perl yourself. | |
344 | ||
345 | =item Bad name after %s:: | |
346 | ||
347 | (F) You started to name a symbol by using a package prefix, and then | |
348 | didn't finish the symbol. In particular, you can't interpolate outside | |
349 | of quotes, so | |
350 | ||
351 | $var = 'myvar'; | |
352 | $sym = mypack::$var; | |
353 | ||
354 | is not the same as | |
355 | ||
356 | $var = 'myvar'; | |
357 | $sym = "mypack::$var"; | |
358 | ||
359 | =item Bad realloc() ignored | |
360 | ||
361 | (S malloc) An internal routine called realloc() on something that had | |
362 | never been malloc()ed in the first place. Mandatory, but can be disabled | |
363 | by setting environment variable C<PERL_BADFREE> to 1. | |
364 | ||
365 | =item Bad symbol for array | |
366 | ||
367 | (P) An internal request asked to add an array entry to something that | |
368 | wasn't a symbol table entry. | |
369 | ||
370 | =item Bad symbol for filehandle | |
371 | ||
372 | (P) An internal request asked to add a filehandle entry to something | |
373 | that wasn't a symbol table entry. | |
374 | ||
375 | =item Bad symbol for hash | |
376 | ||
377 | (P) An internal request asked to add a hash entry to something that | |
378 | wasn't a symbol table entry. | |
379 | ||
380 | =item Bareword found in conditional | |
381 | ||
382 | (W bareword) The compiler found a bareword where it expected a | |
383 | conditional, which often indicates that an || or && was parsed as part | |
384 | of the last argument of the previous construct, for example: | |
385 | ||
386 | open FOO || die; | |
387 | ||
388 | It may also indicate a misspelled constant that has been interpreted as | |
389 | a bareword: | |
390 | ||
391 | use constant TYPO => 1; | |
392 | if (TYOP) { print "foo" } | |
393 | ||
394 | The C<strict> pragma is useful in avoiding such errors. | |
395 | ||
396 | =item Bareword "%s" not allowed while "strict subs" in use | |
397 | ||
398 | (F) With "strict subs" in use, a bareword is only allowed as a | |
399 | subroutine identifier, in curly brackets or to the left of the "=>" | |
400 | symbol. Perhaps you need to predeclare a subroutine? | |
401 | ||
402 | =item Bareword "%s" refers to nonexistent package | |
403 | ||
404 | (W bareword) You used a qualified bareword of the form C<Foo::>, but the | |
405 | compiler saw no other uses of that namespace before that point. Perhaps | |
406 | you need to predeclare a package? | |
407 | ||
408 | =item BEGIN failed--compilation aborted | |
409 | ||
410 | (F) An untrapped exception was raised while executing a BEGIN | |
411 | subroutine. Compilation stops immediately and the interpreter is | |
412 | exited. | |
413 | ||
414 | =item BEGIN not safe after errors--compilation aborted | |
415 | ||
416 | (F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which | |
417 | implies a C<BEGIN {}>) after one or more compilation errors had already | |
418 | occurred. Since the intended environment for the C<BEGIN {}> could not | |
419 | be guaranteed (due to the errors), and since subsequent code likely | |
420 | depends on its correct operation, Perl just gave up. | |
421 | ||
422 | =item \1 better written as $1 | |
423 | ||
424 | (W syntax) Outside of patterns, backreferences live on as variables. | |
425 | The use of backslashes is grandfathered on the right-hand side of a | |
426 | substitution, but stylistically it's better to use the variable form | |
427 | because other Perl programmers will expect it, and it works better if | |
428 | there are more than 9 backreferences. | |
429 | ||
430 | =item Binary number > 0b11111111111111111111111111111111 non-portable | |
431 | ||
432 | (W portable) The binary number you specified is larger than 2**32-1 | |
433 | (4294967295) and therefore non-portable between systems. See | |
434 | L<perlport> for more on portability concerns. | |
435 | ||
436 | =item bind() on closed socket %s | |
437 | ||
438 | (W closed) You tried to do a bind on a closed socket. Did you forget to | |
439 | check the return value of your socket() call? See L<perlfunc/bind>. | |
440 | ||
441 | =item binmode() on closed filehandle %s | |
442 | ||
443 | (W unopened) You tried binmode() on a filehandle that was never opened. | |
444 | Check you control flow and number of arguments. | |
445 | ||
446 | =item Bit vector size > 32 non-portable | |
447 | ||
448 | (W portable) Using bit vector sizes larger than 32 is non-portable. | |
449 | ||
450 | =item Bizarre copy of %s in %s | |
451 | ||
452 | (P) Perl detected an attempt to copy an internal value that is not | |
453 | copyable. | |
454 | ||
455 | =item Buffer overflow in prime_env_iter: %s | |
456 | ||
457 | (W internal) A warning peculiar to VMS. While Perl was preparing to | |
458 | iterate over %ENV, it encountered a logical name or symbol definition | |
459 | which was too long, so it was truncated to the string shown. | |
460 | ||
461 | =item Callback called exit | |
462 | ||
463 | (F) A subroutine invoked from an external package via call_sv() | |
464 | exited by calling exit. | |
465 | ||
466 | =item %s() called too early to check prototype | |
467 | ||
468 | (W prototype) You've called a function that has a prototype before the | |
469 | parser saw a definition or declaration for it, and Perl could not check | |
470 | that the call conforms to the prototype. You need to either add an | |
471 | early prototype declaration for the subroutine in question, or move the | |
472 | subroutine definition ahead of the call to get proper prototype | |
473 | checking. Alternatively, if you are certain that you're calling the | |
474 | function correctly, you may put an ampersand before the name to avoid | |
475 | the warning. See L<perlsub>. | |
476 | ||
477 | =item Cannot compress integer in pack | |
478 | ||
479 | (F) An argument to pack("w",...) was too large to compress. The BER | |
480 | compressed integer format can only be used with positive integers, and you | |
481 | attempted to compress Infinity or a very large number (> 1e308). | |
482 | See L<perlfunc/pack>. | |
483 | ||
484 | =item Cannot compress negative numbers in pack | |
485 | ||
486 | (F) An argument to pack("w",...) was negative. The BER compressed integer | |
487 | format can only be used with positive integers. See L<perlfunc/pack>. | |
488 | ||
489 | =item Can only compress unsigned integers in pack | |
490 | ||
491 | (F) An argument to pack("w",...) was not an integer. The BER compressed | |
492 | integer format can only be used with positive integers, and you attempted | |
493 | to compress something else. See L<perlfunc/pack>. | |
494 | ||
495 | =item Can't bless non-reference value | |
496 | ||
497 | (F) Only hard references may be blessed. This is how Perl "enforces" | |
498 | encapsulation of objects. See L<perlobj>. | |
499 | ||
500 | =item Can't call method "%s" in empty package "%s" | |
501 | ||
502 | (F) You called a method correctly, and it correctly indicated a package | |
503 | functioning as a class, but that package doesn't have ANYTHING defined | |
504 | in it, let alone methods. See L<perlobj>. | |
505 | ||
506 | =item Can't call method "%s" on an undefined value | |
507 | ||
508 | (F) You used the syntax of a method call, but the slot filled by the | |
509 | object reference or package name contains an undefined value. Something | |
510 | like this will reproduce the error: | |
511 | ||
512 | $BADREF = undef; | |
513 | process $BADREF 1,2,3; | |
514 | $BADREF->process(1,2,3); | |
515 | ||
516 | =item Can't call method "%s" on unblessed reference | |
517 | ||
518 | (F) A method call must know in what package it's supposed to run. It | |
519 | ordinarily finds this out from the object reference you supply, but you | |
520 | didn't supply an object reference in this case. A reference isn't an | |
521 | object reference until it has been blessed. See L<perlobj>. | |
522 | ||
523 | =item Can't call method "%s" without a package or object reference | |
524 | ||
525 | (F) You used the syntax of a method call, but the slot filled by the | |
526 | object reference or package name contains an expression that returns a | |
527 | defined value which is neither an object reference nor a package name. | |
528 | Something like this will reproduce the error: | |
529 | ||
530 | $BADREF = 42; | |
531 | process $BADREF 1,2,3; | |
532 | $BADREF->process(1,2,3); | |
533 | ||
534 | =item Can't chdir to %s | |
535 | ||
536 | (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory | |
537 | that you can chdir to, possibly because it doesn't exist. | |
538 | ||
539 | =item Can't check filesystem of script "%s" for nosuid | |
540 | ||
541 | (P) For some reason you can't check the filesystem of the script for | |
542 | nosuid. | |
543 | ||
544 | =item Can't coerce array into hash | |
545 | ||
546 | (F) You used an array where a hash was expected, but the array has no | |
547 | information on how to map from keys to array indices. You can do that | |
548 | only with arrays that have a hash reference at index 0. | |
549 | ||
550 | =item Can't coerce %s to integer in %s | |
551 | ||
552 | (F) Certain types of SVs, in particular real symbol table entries | |
553 | (typeglobs), can't be forced to stop being what they are. So you can't | |
554 | say things like: | |
555 | ||
556 | *foo += 1; | |
557 | ||
558 | You CAN say | |
559 | ||
560 | $foo = *foo; | |
561 | $foo += 1; | |
562 | ||
563 | but then $foo no longer contains a glob. | |
564 | ||
565 | =item Can't coerce %s to number in %s | |
566 | ||
567 | (F) Certain types of SVs, in particular real symbol table entries | |
568 | (typeglobs), can't be forced to stop being what they are. | |
569 | ||
570 | =item Can't coerce %s to string in %s | |
571 | ||
572 | (F) Certain types of SVs, in particular real symbol table entries | |
573 | (typeglobs), can't be forced to stop being what they are. | |
574 | ||
575 | =item Can't create pipe mailbox | |
576 | ||
577 | (P) An error peculiar to VMS. The process is suffering from exhausted | |
578 | quotas or other plumbing problems. | |
579 | ||
580 | =item Can't declare class for non-scalar %s in "%s" | |
581 | ||
582 | (F) Currently, only scalar variables can be declared with a specific | |
583 | class qualifier in a "my" or "our" declaration. The semantics may be | |
584 | extended for other types of variables in future. | |
585 | ||
586 | =item Can't declare %s in "%s" | |
587 | ||
588 | (F) Only scalar, array, and hash variables may be declared as "my" or | |
589 | "our" variables. They must have ordinary identifiers as names. | |
590 | ||
591 | =item Can't do inplace edit: %s is not a regular file | |
592 | ||
593 | (S inplace) You tried to use the B<-i> switch on a special file, such as | |
594 | a file in /dev, or a FIFO. The file was ignored. | |
595 | ||
596 | =item Can't do inplace edit on %s: %s | |
597 | ||
598 | (S inplace) The creation of the new file failed for the indicated | |
599 | reason. | |
600 | ||
601 | =item Can't do inplace edit without backup | |
602 | ||
603 | (F) You're on a system such as MS-DOS that gets confused if you try | |
604 | reading from a deleted (but still opened) file. You have to say | |
605 | C<-i.bak>, or some such. | |
606 | ||
607 | =item Can't do inplace edit: %s would not be unique | |
608 | ||
609 | (S inplace) Your filesystem does not support filenames longer than 14 | |
610 | characters and Perl was unable to create a unique filename during | |
611 | inplace editing with the B<-i> switch. The file was ignored. | |
612 | ||
613 | =item Can't do {n,m} with n > m in regex; marked by <-- HERE in m/%s/ | |
614 | ||
615 | (F) Minima must be less than or equal to maxima. If you really want your | |
616 | regexp to match something 0 times, just put {0}. The <-- HERE shows in the | |
617 | regular expression about where the problem was discovered. See L<perlre>. | |
618 | ||
619 | =item Can't do setegid! | |
620 | ||
621 | (P) The setegid() call failed for some reason in the setuid emulator of | |
622 | suidperl. | |
623 | ||
624 | =item Can't do seteuid! | |
625 | ||
626 | (P) The setuid emulator of suidperl failed for some reason. | |
627 | ||
628 | =item Can't do setuid | |
629 | ||
630 | (F) This typically means that ordinary perl tried to exec suidperl to do | |
631 | setuid emulation, but couldn't exec it. It looks for a name of the form | |
632 | sperl5.000 in the same directory that the perl executable resides under | |
633 | the name perl5.000, typically /usr/local/bin on Unix machines. If the | |
634 | file is there, check the execute permissions. If it isn't, ask your | |
635 | sysadmin why he and/or she removed it. | |
636 | ||
637 | =item Can't do waitpid with flags | |
638 | ||
639 | (F) This machine doesn't have either waitpid() or wait4(), so only | |
640 | waitpid() without flags is emulated. | |
641 | ||
642 | =item Can't emulate -%s on #! line | |
643 | ||
644 | (F) The #! line specifies a switch that doesn't make sense at this | |
645 | point. For example, it'd be kind of silly to put a B<-x> on the #! | |
646 | line. | |
647 | ||
648 | =item Can't exec "%s": %s | |
649 | ||
650 | (W exec) A system(), exec(), or piped open call could not execute the | |
651 | named program for the indicated reason. Typical reasons include: the | |
652 | permissions were wrong on the file, the file wasn't found in | |
653 | C<$ENV{PATH}>, the executable in question was compiled for another | |
654 | architecture, or the #! line in a script points to an interpreter that | |
655 | can't be run for similar reasons. (Or maybe your system doesn't support | |
656 | #! at all.) | |
657 | ||
658 | =item Can't exec %s | |
659 | ||
660 | (F) Perl was trying to execute the indicated program for you because | |
661 | that's what the #! line said. If that's not what you wanted, you may | |
662 | need to mention "perl" on the #! line somewhere. | |
663 | ||
664 | =item Can't execute %s | |
665 | ||
666 | (F) You used the B<-S> switch, but the copies of the script to execute | |
667 | found in the PATH did not have correct permissions. | |
668 | ||
669 | =item Can't find an opnumber for "%s" | |
670 | ||
671 | (F) A string of a form C<CORE::word> was given to prototype(), but there | |
672 | is no builtin with the name C<word>. | |
673 | ||
674 | =item Can't find %s character property "%s" | |
675 | ||
676 | (F) You used C<\p{}> or C<\P{}> but the character property by that name | |
677 | could not be found. Maybe you misspelled the name of the property | |
678 | (remember that the names of character properties consist only of | |
679 | alphanumeric characters), or maybe you forgot the C<Is> or C<In> prefix? | |
680 | ||
681 | =item Can't find label %s | |
682 | ||
683 | (F) You said to goto a label that isn't mentioned anywhere that it's | |
684 | possible for us to go to. See L<perlfunc/goto>. | |
685 | ||
686 | =item Can't find %s on PATH | |
687 | ||
688 | (F) You used the B<-S> switch, but the script to execute could not be | |
689 | found in the PATH. | |
690 | ||
691 | =item Can't find %s on PATH, '.' not in PATH | |
692 | ||
693 | (F) You used the B<-S> switch, but the script to execute could not be | |
694 | found in the PATH, or at least not with the correct permissions. The | |
695 | script exists in the current directory, but PATH prohibits running it. | |
696 | ||
697 | =item Can't find %s property definition %s | |
698 | ||
699 | (F) You may have tried to use C<\p> which means a Unicode property (for | |
700 | example C<\p{Lu}> is all uppercase letters). If you did mean to use a | |
701 | Unicode property, see L<perlunicode> for the list of known properties. | |
702 | If you didn't mean to use a Unicode property, escape the C<\p>, either | |
703 | by C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, until | |
704 | possible C<\E>). | |
705 | ||
706 | =item Can't find string terminator %s anywhere before EOF | |
707 | ||
708 | (F) Perl strings can stretch over multiple lines. This message means | |
709 | that the closing delimiter was omitted. Because bracketed quotes count | |
710 | nesting levels, the following is missing its final parenthesis: | |
711 | ||
712 | print q(The character '(' starts a side comment.); | |
713 | ||
714 | If you're getting this error from a here-document, you may have included | |
715 | unseen whitespace before or after your closing tag. A good programmer's | |
716 | editor will have a way to help you find these characters. | |
717 | ||
718 | =item Can't fork | |
719 | ||
720 | (F) A fatal error occurred while trying to fork while opening a | |
721 | pipeline. | |
722 | ||
723 | =item Can't get filespec - stale stat buffer? | |
724 | ||
725 | (S) A warning peculiar to VMS. This arises because of the difference | |
726 | between access checks under VMS and under the Unix model Perl assumes. | |
727 | Under VMS, access checks are done by filename, rather than by bits in | |
728 | the stat buffer, so that ACLs and other protections can be taken into | |
729 | account. Unfortunately, Perl assumes that the stat buffer contains all | |
730 | the necessary information, and passes it, instead of the filespec, to | |
731 | the access checking routine. It will try to retrieve the filespec using | |
732 | the device name and FID present in the stat buffer, but this works only | |
733 | if you haven't made a subsequent call to the CRTL stat() routine, | |
734 | because the device name is overwritten with each call. If this warning | |
735 | appears, the name lookup failed, and the access checking routine gave up | |
736 | and returned FALSE, just to be conservative. (Note: The access checking | |
737 | routine knows about the Perl C<stat> operator and file tests, so you | |
738 | shouldn't ever see this warning in response to a Perl command; it arises | |
739 | only if some internal code takes stat buffers lightly.) | |
740 | ||
741 | =item Can't get pipe mailbox device name | |
742 | ||
743 | (P) An error peculiar to VMS. After creating a mailbox to act as a | |
744 | pipe, Perl can't retrieve its name for later use. | |
745 | ||
746 | =item Can't get SYSGEN parameter value for MAXBUF | |
747 | ||
748 | (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your | |
749 | mailbox buffers to be, and didn't get an answer. | |
750 | ||
751 | =item Can't "goto" into the middle of a foreach loop | |
752 | ||
753 | (F) A "goto" statement was executed to jump into the middle of a foreach | |
754 | loop. You can't get there from here. See L<perlfunc/goto>. | |
755 | ||
756 | =item Can't "goto" out of a pseudo block | |
757 | ||
758 | (F) A "goto" statement was executed to jump out of what might look like | |
759 | a block, except that it isn't a proper block. This usually occurs if | |
760 | you tried to jump out of a sort() block or subroutine, which is a no-no. | |
761 | See L<perlfunc/goto>. | |
762 | ||
763 | =item Can't goto subroutine from an eval-%s | |
764 | ||
765 | (F) The "goto subroutine" call can't be used to jump out of an eval | |
766 | "string" or block. | |
767 | ||
768 | =item Can't goto subroutine outside a subroutine | |
769 | ||
770 | (F) The deeply magical "goto subroutine" call can only replace one | |
771 | subroutine call for another. It can't manufacture one out of whole | |
772 | cloth. In general you should be calling it out of only an AUTOLOAD | |
773 | routine anyway. See L<perlfunc/goto>. | |
774 | ||
775 | =item Can't ignore signal CHLD, forcing to default | |
776 | ||
777 | (W signal) Perl has detected that it is being run with the SIGCHLD | |
778 | signal (sometimes known as SIGCLD) disabled. Since disabling this | |
779 | signal will interfere with proper determination of exit status of child | |
780 | processes, Perl has reset the signal to its default value. This | |
781 | situation typically indicates that the parent program under which Perl | |
782 | may be running (e.g. cron) is being very careless. | |
783 | ||
784 | =item Can't "last" outside a loop block | |
785 | ||
786 | (F) A "last" statement was executed to break out of the current block, | |
787 | except that there's this itty bitty problem called there isn't a current | |
788 | block. Note that an "if" or "else" block doesn't count as a "loopish" | |
789 | block, as doesn't a block given to sort(), map() or grep(). You can | |
790 | usually double the curlies to get the same effect though, because the | |
791 | inner curlies will be considered a block that loops once. See | |
792 | L<perlfunc/last>. | |
793 | ||
794 | =item Can't load '%s' for module %s | |
795 | ||
796 | (F) The module you tried to load failed to load a dynamic extension. This | |
797 | may either mean that you upgraded your version of perl to one that is | |
798 | incompatible with your old dynamic extensions (which is known to happen | |
799 | between major versions of perl), or (more likely) that your dynamic | |
800 | extension was built against an older version of the library that is | |
801 | installed on your system. You may need to rebuild your old dynamic | |
802 | extensions. | |
803 | ||
804 | =item Can't localize lexical variable %s | |
805 | ||
806 | (F) You used local on a variable name that was previously declared as a | |
807 | lexical variable using "my". This is not allowed. If you want to | |
808 | localize a package variable of the same name, qualify it with the | |
809 | package name. | |
810 | ||
811 | =item Can't localize pseudo-hash element | |
812 | ||
813 | (F) You said something like C<< local $ar->{'key'} >>, where $ar is a | |
814 | reference to a pseudo-hash. That hasn't been implemented yet, but you | |
815 | can get a similar effect by localizing the corresponding array element | |
816 | directly -- C<< local $ar->[$ar->[0]{'key'}] >>. | |
817 | ||
818 | =item Can't localize through a reference | |
819 | ||
820 | (F) You said something like C<local $$ref>, which Perl can't currently | |
821 | handle, because when it goes to restore the old value of whatever $ref | |
822 | pointed to after the scope of the local() is finished, it can't be sure | |
823 | that $ref will still be a reference. | |
824 | ||
825 | =item Can't locate %s | |
826 | ||
827 | (F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be | |
828 | found. Perl looks for the file in all the locations mentioned in @INC, | |
829 | unless the file name included the full path to the file. Perhaps you | |
830 | need to set the PERL5LIB or PERL5OPT environment variable to say where | |
831 | the extra library is, or maybe the script needs to add the library name | |
832 | to @INC. Or maybe you just misspelled the name of the file. See | |
833 | L<perlfunc/require> and L<lib>. | |
834 | ||
835 | =item Can't locate auto/%s.al in @INC | |
836 | ||
837 | (F) A function (or method) was called in a package which allows | |
838 | autoload, but there is no function to autoload. Most probable causes | |
839 | are a misprint in a function/method name or a failure to C<AutoSplit> | |
840 | the file, say, by doing C<make install>. | |
841 | ||
842 | =item Can't locate loadable object for module %s in @INC | |
843 | ||
844 | (F) The module you loaded is trying to load an external library, like | |
845 | for example, C<foo.so> or C<bar.dll>, but the L<DynaLoader> module was | |
846 | unable to locate this library. See L<DynaLoader>. | |
847 | ||
848 | =item Can't locate object method "%s" via package "%s" | |
849 | ||
850 | (F) You called a method correctly, and it correctly indicated a package | |
851 | functioning as a class, but that package doesn't define that particular | |
852 | method, nor does any of its base classes. See L<perlobj>. | |
853 | ||
854 | =item Can't locate package %s for @%s::ISA | |
855 | ||
856 | (W syntax) The @ISA array contained the name of another package that | |
857 | doesn't seem to exist. | |
858 | ||
859 | =item Can't locate PerlIO%s | |
860 | ||
861 | (F) You tried to use in open() a PerlIO layer that does not exist, | |
862 | e.g. open(FH, ">:nosuchlayer", "somefile"). | |
863 | ||
864 | =item Can't make list assignment to \%ENV on this system | |
865 | ||
866 | (F) List assignment to %ENV is not supported on some systems, notably | |
867 | VMS. | |
868 | ||
869 | =item Can't modify %s in %s | |
870 | ||
871 | (F) You aren't allowed to assign to the item indicated, or otherwise try | |
872 | to change it, such as with an auto-increment. | |
873 | ||
874 | =item Can't modify nonexistent substring | |
875 | ||
876 | (P) The internal routine that does assignment to a substr() was handed | |
877 | a NULL. | |
878 | ||
879 | =item Can't modify non-lvalue subroutine call | |
880 | ||
881 | (F) Subroutines meant to be used in lvalue context should be declared as | |
882 | such, see L<perlsub/"Lvalue subroutines">. | |
883 | ||
884 | =item Can't msgrcv to read-only var | |
885 | ||
886 | (F) The target of a msgrcv must be modifiable to be used as a receive | |
887 | buffer. | |
888 | ||
889 | =item Can't "next" outside a loop block | |
890 | ||
891 | (F) A "next" statement was executed to reiterate the current block, but | |
892 | there isn't a current block. Note that an "if" or "else" block doesn't | |
893 | count as a "loopish" block, as doesn't a block given to sort(), map() or | |
894 | grep(). You can usually double the curlies to get the same effect | |
895 | though, because the inner curlies will be considered a block that loops | |
896 | once. See L<perlfunc/next>. | |
897 | ||
898 | =item Can't open %s: %s | |
899 | ||
900 | (S inplace) The implicit opening of a file through use of the C<< <> >> | |
901 | filehandle, either implicitly under the C<-n> or C<-p> command-line | |
902 | switches, or explicitly, failed for the indicated reason. Usually this | |
903 | is because you don't have read permission for a file which you named on | |
904 | the command line. | |
905 | ||
906 | =item Can't open a reference | |
907 | ||
908 | (W io) You tried to open a scalar reference for reading or writing, | |
909 | using the 3-arg open() syntax : | |
910 | ||
911 | open FH, '>', $ref; | |
912 | ||
913 | but your version of perl is compiled without perlio, and this form of | |
914 | open is not supported. | |
915 | ||
916 | =item Can't open bidirectional pipe | |
917 | ||
918 | (W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported. | |
919 | You can try any of several modules in the Perl library to do this, such | |
920 | as IPC::Open2. Alternately, direct the pipe's output to a file using | |
921 | ">", and then read it in under a different file handle. | |
922 | ||
923 | =item Can't open error file %s as stderr | |
924 | ||
925 | (F) An error peculiar to VMS. Perl does its own command line | |
926 | redirection, and couldn't open the file specified after '2>' or '2>>' on | |
927 | the command line for writing. | |
928 | ||
929 | =item Can't open input file %s as stdin | |
930 | ||
931 | (F) An error peculiar to VMS. Perl does its own command line | |
932 | redirection, and couldn't open the file specified after '<' on the | |
933 | command line for reading. | |
934 | ||
935 | =item Can't open output file %s as stdout | |
936 | ||
937 | (F) An error peculiar to VMS. Perl does its own command line | |
938 | redirection, and couldn't open the file specified after '>' or '>>' on | |
939 | the command line for writing. | |
940 | ||
941 | =item Can't open output pipe (name: %s) | |
942 | ||
943 | (P) An error peculiar to VMS. Perl does its own command line | |
944 | redirection, and couldn't open the pipe into which to send data destined | |
945 | for stdout. | |
946 | ||
947 | =item Can't open perl script%s | |
948 | ||
949 | (F) The script you specified can't be opened for the indicated reason. | |
950 | ||
951 | If you're debugging a script that uses #!, and normally relies on the | |
952 | shell's $PATH search, the -S option causes perl to do that search, so | |
953 | you don't have to type the path or C<`which $scriptname`>. | |
954 | ||
955 | =item Can't read CRTL environ | |
956 | ||
957 | (S) A warning peculiar to VMS. Perl tried to read an element of %ENV | |
958 | from the CRTL's internal environment array and discovered the array was | |
959 | missing. You need to figure out where your CRTL misplaced its environ | |
960 | or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not | |
961 | searched. | |
962 | ||
963 | =item Can't redefine active sort subroutine %s | |
964 | ||
965 | (F) Perl optimizes the internal handling of sort subroutines and keeps | |
966 | pointers into them. You tried to redefine one such sort subroutine when | |
967 | it was currently active, which is not allowed. If you really want to do | |
968 | this, you should write C<sort { &func } @x> instead of C<sort func @x>. | |
969 | ||
970 | =item Can't "redo" outside a loop block | |
971 | ||
972 | (F) A "redo" statement was executed to restart the current block, but | |
973 | there isn't a current block. Note that an "if" or "else" block doesn't | |
974 | count as a "loopish" block, as doesn't a block given to sort(), map() | |
975 | or grep(). You can usually double the curlies to get the same effect | |
976 | though, because the inner curlies will be considered a block that | |
977 | loops once. See L<perlfunc/redo>. | |
978 | ||
979 | =item Can't remove %s: %s, skipping file | |
980 | ||
981 | (S inplace) You requested an inplace edit without creating a backup | |
982 | file. Perl was unable to remove the original file to replace it with | |
983 | the modified file. The file was left unmodified. | |
984 | ||
985 | =item Can't rename %s to %s: %s, skipping file | |
986 | ||
987 | (S inplace) The rename done by the B<-i> switch failed for some reason, | |
988 | probably because you don't have write permission to the directory. | |
989 | ||
990 | =item Can't reopen input pipe (name: %s) in binary mode | |
991 | ||
992 | (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried | |
993 | to reopen it to accept binary data. Alas, it failed. | |
994 | ||
995 | =item Can't resolve method `%s' overloading `%s' in package `%s' | |
996 | ||
997 | (F|P) Error resolving overloading specified by a method name (as opposed | |
998 | to a subroutine reference): no such method callable via the package. If | |
999 | method name is C<???>, this is an internal error. | |
1000 | ||
1001 | =item Can't reswap uid and euid | |
1002 | ||
1003 | (P) The setreuid() call failed for some reason in the setuid emulator of | |
1004 | suidperl. | |
1005 | ||
1006 | =item Can't return %s from lvalue subroutine | |
1007 | ||
1008 | (F) Perl detected an attempt to return illegal lvalues (such as | |
1009 | temporary or readonly values) from a subroutine used as an lvalue. This | |
1010 | is not allowed. | |
1011 | ||
1012 | =item Can't return outside a subroutine | |
1013 | ||
1014 | (F) The return statement was executed in mainline code, that is, where | |
1015 | there was no subroutine call to return out of. See L<perlsub>. | |
1016 | ||
1017 | =item Can't return %s to lvalue scalar context | |
1018 | ||
1019 | (F) You tried to return a complete array or hash from an lvalue subroutine, | |
1020 | but you called the subroutine in a way that made Perl think you meant | |
1021 | to return only one value. You probably meant to write parentheses around | |
1022 | the call to the subroutine, which tell Perl that the call should be in | |
1023 | list context. | |
1024 | ||
1025 | =item Can't stat script "%s" | |
1026 | ||
1027 | (P) For some reason you can't fstat() the script even though you have it | |
1028 | open already. Bizarre. | |
1029 | ||
1030 | =item Can't swap uid and euid | |
1031 | ||
1032 | (P) The setreuid() call failed for some reason in the setuid emulator of | |
1033 | suidperl. | |
1034 | ||
1035 | =item Can't take log of %g | |
1036 | ||
1037 | (F) For ordinary real numbers, you can't take the logarithm of a | |
1038 | negative number or zero. There's a Math::Complex package that comes | |
1039 | standard with Perl, though, if you really want to do that for the | |
1040 | negative numbers. | |
1041 | ||
1042 | =item Can't take sqrt of %g | |
1043 | ||
1044 | (F) For ordinary real numbers, you can't take the square root of a | |
1045 | negative number. There's a Math::Complex package that comes standard | |
1046 | with Perl, though, if you really want to do that. | |
1047 | ||
1048 | =item Can't undef active subroutine | |
1049 | ||
1050 | (F) You can't undefine a routine that's currently running. You can, | |
1051 | however, redefine it while it's running, and you can even undef the | |
1052 | redefined subroutine while the old routine is running. Go figure. | |
1053 | ||
1054 | =item Can't unshift | |
1055 | ||
1056 | (F) You tried to unshift an "unreal" array that can't be unshifted, such | |
1057 | as the main Perl stack. | |
1058 | ||
1059 | =item Can't upgrade that kind of scalar | |
1060 | ||
1061 | (P) The internal sv_upgrade routine adds "members" to an SV, making it | |
1062 | into a more specialized kind of SV. The top several SV types are so | |
1063 | specialized, however, that they cannot be interconverted. This message | |
1064 | indicates that such a conversion was attempted. | |
1065 | ||
1066 | =item Can't upgrade to undef | |
1067 | ||
1068 | (P) The undefined SV is the bottom of the totem pole, in the scheme of | |
1069 | upgradability. Upgrading to undef indicates an error in the code | |
1070 | calling sv_upgrade. | |
1071 | ||
1072 | =item Can't use anonymous symbol table for method lookup | |
1073 | ||
1074 | (F) The internal routine that does method lookup was handed a symbol | |
1075 | table that doesn't have a name. Symbol tables can become anonymous | |
1076 | for example by undefining stashes: C<undef %Some::Package::>. | |
1077 | ||
1078 | =item Can't use an undefined value as %s reference | |
1079 | ||
1080 | (F) A value used as either a hard reference or a symbolic reference must | |
1081 | be a defined value. This helps to delurk some insidious errors. | |
1082 | ||
1083 | =item Can't use bareword ("%s") as %s ref while "strict refs" in use | |
1084 | ||
1085 | (F) Only hard references are allowed by "strict refs". Symbolic | |
1086 | references are disallowed. See L<perlref>. | |
1087 | ||
1088 | =item Can't use %! because Errno.pm is not available | |
1089 | ||
1090 | (F) The first time the %! hash is used, perl automatically loads the | |
1091 | Errno.pm module. The Errno module is expected to tie the %! hash to | |
1092 | provide symbolic names for C<$!> errno values. | |
1093 | ||
1094 | =item Can't use %s for loop variable | |
1095 | ||
1096 | (F) Only a simple scalar variable may be used as a loop variable on a | |
1097 | foreach. | |
1098 | ||
1099 | =item Can't use global %s in "my" | |
1100 | ||
1101 | (F) You tried to declare a magical variable as a lexical variable. This | |
1102 | is not allowed, because the magic can be tied to only one location | |
1103 | (namely the global variable) and it would be incredibly confusing to | |
1104 | have variables in your program that looked like magical variables but | |
1105 | weren't. | |
1106 | ||
1107 | =item Can't use "my %s" in sort comparison | |
1108 | ||
1109 | (F) The global variables $a and $b are reserved for sort comparisons. | |
1110 | You mentioned $a or $b in the same line as the <=> or cmp operator, | |
1111 | and the variable had earlier been declared as a lexical variable. | |
1112 | Either qualify the sort variable with the package name, or rename the | |
1113 | lexical variable. | |
1114 | ||
1115 | =item Can't use %s ref as %s ref | |
1116 | ||
1117 | (F) You've mixed up your reference types. You have to dereference a | |
1118 | reference of the type needed. You can use the ref() function to | |
1119 | test the type of the reference, if need be. | |
1120 | ||
1121 | =item Can't use string ("%s") as %s ref while "strict refs" in use | |
1122 | ||
1123 | (F) Only hard references are allowed by "strict refs". Symbolic | |
1124 | references are disallowed. See L<perlref>. | |
1125 | ||
1126 | =item Can't use subscript on %s | |
1127 | ||
1128 | (F) The compiler tried to interpret a bracketed expression as a | |
1129 | subscript. But to the left of the brackets was an expression that | |
1130 | didn't look like a hash or array reference, or anything else subscriptable. | |
1131 | ||
1132 | =item Can't use \%c to mean $%c in expression | |
1133 | ||
1134 | (W syntax) In an ordinary expression, backslash is a unary operator that | |
1135 | creates a reference to its argument. The use of backslash to indicate a | |
1136 | backreference to a matched substring is valid only as part of a regular | |
1137 | expression pattern. Trying to do this in ordinary Perl code produces a | |
1138 | value that prints out looking like SCALAR(0xdecaf). Use the $1 form | |
1139 | instead. | |
1140 | ||
1141 | =item Can't weaken a nonreference | |
1142 | ||
1143 | (F) You attempted to weaken something that was not a reference. Only | |
1144 | references can be weakened. | |
1145 | ||
1146 | =item Can't x= to read-only value | |
1147 | ||
1148 | (F) You tried to repeat a constant value (often the undefined value) | |
1149 | with an assignment operator, which implies modifying the value itself. | |
1150 | Perhaps you need to copy the value to a temporary, and repeat that. | |
1151 | ||
1152 | =item Character in "C" format wrapped in pack | |
1153 | ||
1154 | (W pack) You said | |
1155 | ||
1156 | pack("C", $x) | |
1157 | ||
1158 | where $x is either less than 0 or more than 255; the C<"C"> format is | |
1159 | only for encoding native operating system characters (ASCII, EBCDIC, | |
1160 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1161 | ||
1162 | pack("C", $x & 255) | |
1163 | ||
1164 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1165 | instead. | |
1166 | ||
1167 | =item Character in "c" format wrapped in pack | |
1168 | ||
1169 | (W pack) You said | |
1170 | ||
1171 | pack("c", $x) | |
1172 | ||
1173 | where $x is either less than -128 or more than 127; the C<"c"> format | |
1174 | is only for encoding native operating system characters (ASCII, EBCDIC, | |
1175 | and so on) and not for Unicode characters, so Perl behaved as if you meant | |
1176 | ||
1177 | pack("c", $x & 255); | |
1178 | ||
1179 | If you actually want to pack Unicode codepoints, use the C<"U"> format | |
1180 | instead. | |
1181 | ||
1182 | =item close() on unopened filehandle %s | |
1183 | ||
1184 | (W unopened) You tried to close a filehandle that was never opened. | |
1185 | ||
1186 | =item Code missing after '/' | |
1187 | ||
1188 | (F) You had a (sub-)template that ends with a '/'. There must be another | |
1189 | template code following the slash. See L<perlfunc/pack>. | |
1190 | ||
1191 | =item %s: Command not found | |
1192 | ||
1193 | (A) You've accidentally run your script through B<csh> instead of Perl. | |
1194 | Check the #! line, or manually feed your script into Perl yourself. | |
1195 | ||
1196 | =item Compilation failed in require | |
1197 | ||
1198 | (F) Perl could not compile a file specified in a C<require> statement. | |
1199 | Perl uses this generic message when none of the errors that it | |
1200 | encountered were severe enough to halt compilation immediately. | |
1201 | ||
1202 | =item Complex regular subexpression recursion limit (%d) exceeded | |
1203 | ||
1204 | (W regexp) The regular expression engine uses recursion in complex | |
1205 | situations where back-tracking is required. Recursion depth is limited | |
1206 | to 32766, or perhaps less in architectures where the stack cannot grow | |
1207 | arbitrarily. ("Simple" and "medium" situations are handled without | |
1208 | recursion and are not subject to a limit.) Try shortening the string | |
1209 | under examination; looping in Perl code (e.g. with C<while>) rather than | |
1210 | in the regular expression engine; or rewriting the regular expression so | |
1211 | that it is simpler or backtracks less. (See L<perlfaq2> for information | |
1212 | on I<Mastering Regular Expressions>.) | |
1213 | ||
1214 | =item cond_broadcast() called on unlocked variable | |
1215 | ||
1216 | (W threads) Within a thread-enabled program, you tried to call | |
1217 | cond_broadcast() on a variable which wasn't locked. The cond_broadcast() | |
1218 | function is used to wake up another thread that is waiting in a | |
1219 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1220 | has a chance to enter the wait, it is usual for the signaling thread to | |
1221 | first wait for a lock on variable. This lock attempt will only succeed | |
1222 | after the other thread has entered cond_wait() and thus relinquished the | |
1223 | lock. | |
1224 | ||
1225 | =item cond_signal() called on unlocked variable | |
1226 | ||
1227 | (W threads) Within a thread-enabled program, you tried to call | |
1228 | cond_signal() on a variable which wasn't locked. The cond_signal() | |
1229 | function is used to wake up another thread that is waiting in a | |
1230 | cond_wait(). To ensure that the signal isn't sent before the other thread | |
1231 | has a chance to enter the wait, it is usual for the signaling thread to | |
1232 | first wait for a lock on variable. This lock attempt will only succeed | |
1233 | after the other thread has entered cond_wait() and thus relinquished the | |
1234 | lock. | |
1235 | ||
1236 | =item connect() on closed socket %s | |
1237 | ||
1238 | (W closed) You tried to do a connect on a closed socket. Did you forget | |
1239 | to check the return value of your socket() call? See | |
1240 | L<perlfunc/connect>. | |
1241 | ||
1242 | =item Constant(%s)%s: %s | |
1243 | ||
1244 | (F) The parser found inconsistencies either while attempting to define | |
1245 | an overloaded constant, or when trying to find the character name | |
1246 | specified in the C<\N{...}> escape. Perhaps you forgot to load the | |
1247 | corresponding C<overload> or C<charnames> pragma? See L<charnames> and | |
1248 | L<overload>. | |
1249 | ||
1250 | =item Constant is not %s reference | |
1251 | ||
1252 | (F) A constant value (perhaps declared using the C<use constant> pragma) | |
1253 | is being dereferenced, but it amounts to the wrong type of reference. | |
1254 | The message indicates the type of reference that was expected. This | |
1255 | usually indicates a syntax error in dereferencing the constant value. | |
1256 | See L<perlsub/"Constant Functions"> and L<constant>. | |
1257 | ||
1258 | =item Constant subroutine %s redefined | |
1259 | ||
1260 | (S) You redefined a subroutine which had previously been | |
1261 | eligible for inlining. See L<perlsub/"Constant Functions"> for | |
1262 | commentary and workarounds. | |
1263 | ||
1264 | =item Constant subroutine %s undefined | |
1265 | ||
1266 | (W misc) You undefined a subroutine which had previously been eligible | |
1267 | for inlining. See L<perlsub/"Constant Functions"> for commentary and | |
1268 | workarounds. | |
1269 | ||
1270 | =item Copy method did not return a reference | |
1271 | ||
1272 | (F) The method which overloads "=" is buggy. See | |
1273 | L<overload/Copy Constructor>. | |
1274 | ||
1275 | =item CORE::%s is not a keyword | |
1276 | ||
1277 | (F) The CORE:: namespace is reserved for Perl keywords. | |
1278 | ||
1279 | =item corrupted regexp pointers | |
1280 | ||
1281 | (P) The regular expression engine got confused by what the regular | |
1282 | expression compiler gave it. | |
1283 | ||
1284 | =item corrupted regexp program | |
1285 | ||
1286 | (P) The regular expression engine got passed a regexp program without a | |
1287 | valid magic number. | |
1288 | ||
1289 | =item Corrupt malloc ptr 0x%lx at 0x%lx | |
1290 | ||
1291 | (P) The malloc package that comes with Perl had an internal failure. | |
1292 | ||
1293 | =item Count after length/code in unpack | |
1294 | ||
1295 | (F) You had an unpack template indicating a counted-length string, but | |
1296 | you have also specified an explicit size for the string. See | |
1297 | L<perlfunc/pack>. | |
1298 | ||
1299 | =item Deep recursion on subroutine "%s" | |
1300 | ||
1301 | (W recursion) This subroutine has called itself (directly or indirectly) | |
1302 | 100 times more than it has returned. This probably indicates an | |
1303 | infinite recursion, unless you're writing strange benchmark programs, in | |
1304 | which case it indicates something else. | |
1305 | ||
1306 | =item defined(@array) is deprecated | |
1307 | ||
1308 | (D deprecated) defined() is not usually useful on arrays because it | |
1309 | checks for an undefined I<scalar> value. If you want to see if the | |
1310 | array is empty, just use C<if (@array) { # not empty }> for example. | |
1311 | ||
1312 | =item defined(%hash) is deprecated | |
1313 | ||
1314 | (D deprecated) defined() is not usually useful on hashes because it | |
1315 | checks for an undefined I<scalar> value. If you want to see if the hash | |
1316 | is empty, just use C<if (%hash) { # not empty }> for example. | |
1317 | ||
1318 | =item %s defines neither package nor VERSION--version check failed | |
1319 | ||
1320 | (F) You said something like "use Module 42" but in the Module file | |
1321 | there are neither package declarations nor a C<$VERSION>. | |
1322 | ||
1323 | =item Delimiter for here document is too long | |
1324 | ||
1325 | (F) In a here document construct like C<<<FOO>, the label C<FOO> is too | |
1326 | long for Perl to handle. You have to be seriously twisted to write code | |
1327 | that triggers this error. | |
1328 | ||
1329 | =item DESTROY created new reference to dead object '%s' | |
1330 | ||
1331 | (F) A DESTROY() method created a new reference to the object which is | |
1332 | just being DESTROYed. Perl is confused, and prefers to abort rather than | |
1333 | to create a dangling reference. | |
1334 | ||
1335 | =item Did not produce a valid header | |
1336 | ||
1337 | See Server error. | |
1338 | ||
1339 | =item %s did not return a true value | |
1340 | ||
1341 | (F) A required (or used) file must return a true value to indicate that | |
1342 | it compiled correctly and ran its initialization code correctly. It's | |
1343 | traditional to end such a file with a "1;", though any true value would | |
1344 | do. See L<perlfunc/require>. | |
1345 | ||
1346 | =item (Did you mean &%s instead?) | |
1347 | ||
1348 | (W) You probably referred to an imported subroutine &FOO as $FOO or some | |
1349 | such. | |
1350 | ||
1351 | =item (Did you mean "local" instead of "our"?) | |
1352 | ||
1353 | (W misc) Remember that "our" does not localize the declared global | |
1354 | variable. You have declared it again in the same lexical scope, which | |
1355 | seems superfluous. | |
1356 | ||
1357 | =item (Did you mean $ or @ instead of %?) | |
1358 | ||
1359 | (W) You probably said %hash{$key} when you meant $hash{$key} or | |
1360 | @hash{@keys}. On the other hand, maybe you just meant %hash and got | |
1361 | carried away. | |
1362 | ||
1363 | =item Died | |
1364 | ||
1365 | (F) You passed die() an empty string (the equivalent of C<die "">) or | |
1366 | you called it with no args and both C<$@> and C<$_> were empty. | |
1367 | ||
1368 | =item Document contains no data | |
1369 | ||
1370 | See Server error. | |
1371 | ||
1372 | =item %s does not define %s::VERSION--version check failed | |
1373 | ||
1374 | (F) You said something like "use Module 42" but the Module did not | |
1375 | define a C<$VERSION.> | |
1376 | ||
1377 | =item '/' does not take a repeat count | |
1378 | ||
1379 | (F) You cannot put a repeat count of any kind right after the '/' code. | |
1380 | See L<perlfunc/pack>. | |
1381 | ||
1382 | =item Don't know how to handle magic of type '%s' | |
1383 | ||
1384 | (P) The internal handling of magical variables has been cursed. | |
1385 | ||
1386 | =item do_study: out of memory | |
1387 | ||
1388 | (P) This should have been caught by safemalloc() instead. | |
1389 | ||
1390 | =item (Do you need to predeclare %s?) | |
1391 | ||
1392 | (S syntax) This is an educated guess made in conjunction with the message | |
1393 | "%s found where operator expected". It often means a subroutine or module | |
1394 | name is being referenced that hasn't been declared yet. This may be | |
1395 | because of ordering problems in your file, or because of a missing | |
1396 | "sub", "package", "require", or "use" statement. If you're referencing | |
1397 | something that isn't defined yet, you don't actually have to define the | |
1398 | subroutine or package before the current location. You can use an empty | |
1399 | "sub foo;" or "package FOO;" to enter a "forward" declaration. | |
1400 | ||
1401 | =item dump() better written as CORE::dump() | |
1402 | ||
1403 | (W misc) You used the obsolescent C<dump()> built-in function, without fully | |
1404 | qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>. | |
1405 | ||
1406 | =item Duplicate free() ignored | |
1407 | ||
1408 | (S malloc) An internal routine called free() on something that had | |
1409 | already been freed. | |
1410 | ||
1411 | =item Duplicate modifier '%c' after '%c' in %s | |
1412 | ||
1413 | (W) You have applied the same modifier more than once after a type | |
1414 | in a pack template. See L<perlfunc/pack>. | |
1415 | ||
1416 | =item elseif should be elsif | |
1417 | ||
1418 | (S syntax) There is no keyword "elseif" in Perl because Larry thinks it's | |
1419 | ugly. Your code will be interpreted as an attempt to call a method named | |
1420 | "elseif" for the class returned by the following block. This is | |
1421 | unlikely to be what you want. | |
1422 | ||
1423 | =item Empty %s | |
1424 | ||
1425 | (F) C<\p> and C<\P> are used to introduce a named Unicode property, as | |
1426 | described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in | |
1427 | a regular expression without specifying the property name. | |
1428 | ||
1429 | =item entering effective %s failed | |
1430 | ||
1431 | (F) While under the C<use filetest> pragma, switching the real and | |
1432 | effective uids or gids failed. | |
1433 | ||
1434 | =item %ENV is aliased to %s | |
1435 | ||
1436 | (F) You're running under taint mode, and the C<%ENV> variable has been | |
1437 | aliased to another hash, so it doesn't reflect anymore the state of the | |
1438 | program's environment. This is potentially insecure. | |
1439 | ||
1440 | =item Error converting file specification %s | |
1441 | ||
1442 | (F) An error peculiar to VMS. Because Perl may have to deal with file | |
1443 | specifications in either VMS or Unix syntax, it converts them to a | |
1444 | single form when it must operate on them directly. Either you've passed | |
1445 | an invalid file specification to Perl, or you've found a case the | |
1446 | conversion routines don't handle. Drat. | |
1447 | ||
1448 | =item %s: Eval-group in insecure regular expression | |
1449 | ||
1450 | (F) Perl detected tainted data when trying to compile a regular | |
1451 | expression that contains the C<(?{ ... })> zero-width assertion, which | |
1452 | is unsafe. See L<perlre/(?{ code })>, and L<perlsec>. | |
1453 | ||
1454 | =item %s: Eval-group not allowed at run time | |
1455 | ||
1456 | (F) Perl tried to compile a regular expression containing the | |
1457 | C<(?{ ... })> zero-width assertion at run time, as it would when the | |
1458 | pattern contains interpolated values. Since that is a security risk, it | |
1459 | is not allowed. If you insist, you may still do this by explicitly | |
1460 | building the pattern from an interpolated string at run time and using | |
1461 | that in an eval(). See L<perlre/(?{ code })>. | |
1462 | ||
1463 | =item %s: Eval-group not allowed, use re 'eval' | |
1464 | ||
1465 | (F) A regular expression contained the C<(?{ ... })> zero-width | |
1466 | assertion, but that construct is only allowed when the C<use re 'eval'> | |
1467 | pragma is in effect. See L<perlre/(?{ code })>. | |
1468 | ||
1469 | =item Excessively long <> operator | |
1470 | ||
1471 | (F) The contents of a <> operator may not exceed the maximum size of a | |
1472 | Perl identifier. If you're just trying to glob a long list of | |
1473 | filenames, try using the glob() operator, or put the filenames into a | |
1474 | variable and glob that. | |
1475 | ||
1476 | =item exec? I'm not *that* kind of operating system | |
1477 | ||
1478 | (F) The C<exec> function is not implemented in MacPerl. See L<perlport>. | |
1479 | ||
1480 | =item Execution of %s aborted due to compilation errors | |
1481 | ||
1482 | (F) The final summary message when a Perl compilation fails. | |
1483 | ||
1484 | =item Exiting eval via %s | |
1485 | ||
1486 | (W exiting) You are exiting an eval by unconventional means, such as a | |
1487 | goto, or a loop control statement. | |
1488 | ||
1489 | =item Exiting format via %s | |
1490 | ||
1491 | (W exiting) You are exiting a format by unconventional means, such as a | |
1492 | goto, or a loop control statement. | |
1493 | ||
1494 | =item Exiting pseudo-block via %s | |
1495 | ||
1496 | (W exiting) You are exiting a rather special block construct (like a | |
1497 | sort block or subroutine) by unconventional means, such as a goto, or a | |
1498 | loop control statement. See L<perlfunc/sort>. | |
1499 | ||
1500 | =item Exiting subroutine via %s | |
1501 | ||
1502 | (W exiting) You are exiting a subroutine by unconventional means, such | |
1503 | as a goto, or a loop control statement. | |
1504 | ||
1505 | =item Exiting substitution via %s | |
1506 | ||
1507 | (W exiting) You are exiting a substitution by unconventional means, such | |
1508 | as a return, a goto, or a loop control statement. | |
1509 | ||
1510 | =item Explicit blessing to '' (assuming package main) | |
1511 | ||
1512 | (W misc) You are blessing a reference to a zero length string. This has | |
1513 | the effect of blessing the reference into the package main. This is | |
1514 | usually not what you want. Consider providing a default target package, | |
1515 | e.g. bless($ref, $p || 'MyPackage'); | |
1516 | ||
1517 | =item %s: Expression syntax | |
1518 | ||
1519 | (A) You've accidentally run your script through B<csh> instead of Perl. | |
1520 | Check the #! line, or manually feed your script into Perl yourself. | |
1521 | ||
1522 | =item %s failed--call queue aborted | |
1523 | ||
1524 | (F) An untrapped exception was raised while executing a CHECK, INIT, or | |
1525 | END subroutine. Processing of the remainder of the queue of such | |
1526 | routines has been prematurely ended. | |
1527 | ||
1528 | =item False [] range "%s" in regex; marked by <-- HERE in m/%s/ | |
1529 | ||
1530 | (W regexp) A character class range must start and end at a literal | |
1531 | character, not another character class like C<\d> or C<[:alpha:]>. The "-" | |
1532 | in your false range is interpreted as a literal "-". Consider quoting the | |
1533 | "-", "\-". The <-- HERE shows in the regular expression about where the | |
1534 | problem was discovered. See L<perlre>. | |
1535 | ||
1536 | =item Fatal VMS error at %s, line %d | |
1537 | ||
1538 | (P) An error peculiar to VMS. Something untoward happened in a VMS | |
1539 | system service or RTL routine; Perl's exit status should provide more | |
1540 | details. The filename in "at %s" and the line number in "line %d" tell | |
1541 | you which section of the Perl source code is distressed. | |
1542 | ||
1543 | =item fcntl is not implemented | |
1544 | ||
1545 | (F) Your machine apparently doesn't implement fcntl(). What is this, a | |
1546 | PDP-11 or something? | |
1547 | ||
1548 | =item Filehandle %s opened only for input | |
1549 | ||
1550 | (W io) You tried to write on a read-only filehandle. If you intended | |
1551 | it to be a read-write filehandle, you needed to open it with "+<" or | |
1552 | "+>" or "+>>" instead of with "<" or nothing. If you intended only to | |
1553 | write the file, use ">" or ">>". See L<perlfunc/open>. | |
1554 | ||
1555 | =item Filehandle %s opened only for output | |
1556 | ||
1557 | (W io) You tried to read from a filehandle opened only for writing, If | |
1558 | you intended it to be a read/write filehandle, you needed to open it | |
1559 | with "+<" or "+>" or "+>>" instead of with "<" or nothing. If you | |
1560 | intended only to read from the file, use "<". See L<perlfunc/open>. | |
1561 | Another possibility is that you attempted to open filedescriptor 0 | |
1562 | (also known as STDIN) for output (maybe you closed STDIN earlier?). | |
1563 | ||
1564 | =item Filehandle %s reopened as %s only for input | |
1565 | ||
1566 | (W io) You opened for reading a filehandle that got the same filehandle id | |
1567 | as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR | |
1568 | previously. | |
1569 | ||
1570 | =item Filehandle STDIN reopened as %s only for output | |
1571 | ||
1572 | (W io) You opened for writing a filehandle that got the same filehandle id | |
1573 | as STDIN. This occurred because you closed STDIN previously. | |
1574 | ||
1575 | =item Final $ should be \$ or $name | |
1576 | ||
1577 | (F) You must now decide whether the final $ in a string was meant to be | |
1578 | a literal dollar sign, or was meant to introduce a variable name that | |
1579 | happens to be missing. So you have to put either the backslash or the | |
1580 | name. | |
1581 | ||
1582 | =item flock() on closed filehandle %s | |
1583 | ||
1584 | (W closed) The filehandle you're attempting to flock() got itself closed | |
1585 | some time before now. Check your control flow. flock() operates on | |
1586 | filehandles. Are you attempting to call flock() on a dirhandle by the | |
1587 | same name? | |
1588 | ||
1589 | =item Format not terminated | |
1590 | ||
1591 | (F) A format must be terminated by a line with a solitary dot. Perl got | |
1592 | to the end of your file without finding such a line. | |
1593 | ||
1594 | =item Format %s redefined | |
1595 | ||
1596 | (W redefine) You redefined a format. To suppress this warning, say | |
1597 | ||
1598 | { | |
1599 | no warnings 'redefine'; | |
1600 | eval "format NAME =..."; | |
1601 | } | |
1602 | ||
1603 | =item Found = in conditional, should be == | |
1604 | ||
1605 | (W syntax) You said | |
1606 | ||
1607 | if ($foo = 123) | |
1608 | ||
1609 | when you meant | |
1610 | ||
1611 | if ($foo == 123) | |
1612 | ||
1613 | (or something like that). | |
1614 | ||
1615 | =item %s found where operator expected | |
1616 | ||
1617 | (S syntax) The Perl lexer knows whether to expect a term or an operator. | |
1618 | If it sees what it knows to be a term when it was expecting to see an | |
1619 | operator, it gives you this warning. Usually it indicates that an | |
1620 | operator or delimiter was omitted, such as a semicolon. | |
1621 | ||
1622 | =item gdbm store returned %d, errno %d, key "%s" | |
1623 | ||
1624 | (S) A warning from the GDBM_File extension that a store failed. | |
1625 | ||
1626 | =item gethostent not implemented | |
1627 | ||
1628 | (F) Your C library apparently doesn't implement gethostent(), probably | |
1629 | because if it did, it'd feel morally obligated to return every hostname | |
1630 | on the Internet. | |
1631 | ||
1632 | =item get%sname() on closed socket %s | |
1633 | ||
1634 | (W closed) You tried to get a socket or peer socket name on a closed | |
1635 | socket. Did you forget to check the return value of your socket() call? | |
1636 | ||
1637 | =item getpwnam returned invalid UIC %#o for user "%s" | |
1638 | ||
1639 | (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the | |
1640 | C<getpwnam> operator returned an invalid UIC. | |
1641 | ||
1642 | =item getsockopt() on closed socket %s | |
1643 | ||
1644 | (W closed) You tried to get a socket option on a closed socket. Did you | |
1645 | forget to check the return value of your socket() call? See | |
1646 | L<perlfunc/getsockopt>. | |
1647 | ||
1648 | =item Global symbol "%s" requires explicit package name | |
1649 | ||
1650 | (F) You've said "use strict vars", which indicates that all variables | |
1651 | must either be lexically scoped (using "my"), declared beforehand using | |
1652 | "our", or explicitly qualified to say which package the global variable | |
1653 | is in (using "::"). | |
1654 | ||
1655 | =item glob failed (%s) | |
1656 | ||
1657 | (W glob) Something went wrong with the external program(s) used for | |
1658 | C<glob> and C<< <*.c> >>. Usually, this means that you supplied a | |
1659 | C<glob> pattern that caused the external program to fail and exit with a | |
1660 | nonzero status. If the message indicates that the abnormal exit | |
1661 | resulted in a coredump, this may also mean that your csh (C shell) is | |
1662 | broken. If so, you should change all of the csh-related variables in | |
1663 | config.sh: If you have tcsh, make the variables refer to it as if it | |
1664 | were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all | |
1665 | empty (except that C<d_csh> should be C<'undef'>) so that Perl will | |
1666 | think csh is missing. In either case, after editing config.sh, run | |
1667 | C<./Configure -S> and rebuild Perl. | |
1668 | ||
1669 | =item Glob not terminated | |
1670 | ||
1671 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
1672 | a term, so it's looking for the corresponding right angle bracket, and | |
1673 | not finding it. Chances are you left some needed parentheses out | |
1674 | earlier in the line, and you really meant a "less than". | |
1675 | ||
1676 | =item Got an error from DosAllocMem | |
1677 | ||
1678 | (P) An error peculiar to OS/2. Most probably you're using an obsolete | |
1679 | version of Perl, and this should not happen anyway. | |
1680 | ||
1681 | =item goto must have label | |
1682 | ||
1683 | (F) Unlike with "next" or "last", you're not allowed to goto an | |
1684 | unspecified destination. See L<perlfunc/goto>. | |
1685 | ||
1686 | =item ()-group starts with a count | |
1687 | ||
1688 | (F) A ()-group started with a count. A count is | |
1689 | supposed to follow something: a template character or a ()-group. | |
1690 | See L<perlfunc/pack>. | |
1691 | ||
1692 | =item %s had compilation errors | |
1693 | ||
1694 | (F) The final summary message when a C<perl -c> fails. | |
1695 | ||
1696 | =item Had to create %s unexpectedly | |
1697 | ||
1698 | (S internal) A routine asked for a symbol from a symbol table that ought | |
1699 | to have existed already, but for some reason it didn't, and had to be | |
1700 | created on an emergency basis to prevent a core dump. | |
1701 | ||
1702 | =item Hash %%s missing the % in argument %d of %s() | |
1703 | ||
1704 | (D deprecated) Really old Perl let you omit the % on hash names in some | |
1705 | spots. This is now heavily deprecated. | |
1706 | ||
1707 | =item %s has too many errors | |
1708 | ||
1709 | (F) The parser has given up trying to parse the program after 10 errors. | |
1710 | Further error messages would likely be uninformative. | |
1711 | ||
1712 | =item Hexadecimal number > 0xffffffff non-portable | |
1713 | ||
1714 | (W portable) The hexadecimal number you specified is larger than 2**32-1 | |
1715 | (4294967295) and therefore non-portable between systems. See | |
1716 | L<perlport> for more on portability concerns. | |
1717 | ||
1718 | =item Identifier too long | |
1719 | ||
1720 | (F) Perl limits identifiers (names for variables, functions, etc.) to | |
1721 | about 250 characters for simple names, and somewhat more for compound | |
1722 | names (like C<$A::B>). You've exceeded Perl's limits. Future versions | |
1723 | of Perl are likely to eliminate these arbitrary limitations. | |
1724 | ||
1725 | =item Illegal binary digit %s | |
1726 | ||
1727 | (F) You used a digit other than 0 or 1 in a binary number. | |
1728 | ||
1729 | =item Illegal binary digit %s ignored | |
1730 | ||
1731 | (W digit) You may have tried to use a digit other than 0 or 1 in a | |
1732 | binary number. Interpretation of the binary number stopped before the | |
1733 | offending digit. | |
1734 | ||
1735 | =item Illegal character %s (carriage return) | |
1736 | ||
1737 | (F) Perl normally treats carriage returns in the program text as it | |
1738 | would any other whitespace, which means you should never see this error | |
1739 | when Perl was built using standard options. For some reason, your | |
1740 | version of Perl appears to have been built without this support. Talk | |
1741 | to your Perl administrator. | |
1742 | ||
1743 | =item Illegal character in prototype for %s : %s | |
1744 | ||
1745 | (W syntax) An illegal character was found in a prototype declaration. Legal | |
1746 | characters in prototypes are $, @, %, *, ;, [, ], &, and \. | |
1747 | ||
1748 | =item Illegal declaration of anonymous subroutine | |
1749 | ||
1750 | (F) When using the C<sub> keyword to construct an anonymous subroutine, | |
1751 | you must always specify a block of code. See L<perlsub>. | |
1752 | ||
1753 | =item Illegal declaration of subroutine %s | |
1754 | ||
1755 | (F) A subroutine was not declared correctly. See L<perlsub>. | |
1756 | ||
1757 | =item Illegal division by zero | |
1758 | ||
1759 | (F) You tried to divide a number by 0. Either something was wrong in | |
1760 | your logic, or you need to put a conditional in to guard against | |
1761 | meaningless input. | |
1762 | ||
1763 | =item Illegal hexadecimal digit %s ignored | |
1764 | ||
1765 | (W digit) You may have tried to use a character other than 0 - 9 or | |
1766 | A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal | |
1767 | number stopped before the illegal character. | |
1768 | ||
1769 | =item Illegal modulus zero | |
1770 | ||
1771 | (F) You tried to divide a number by 0 to get the remainder. Most | |
1772 | numbers don't take to this kindly. | |
1773 | ||
1774 | =item Illegal number of bits in vec | |
1775 | ||
1776 | (F) The number of bits in vec() (the third argument) must be a power of | |
1777 | two from 1 to 32 (or 64, if your platform supports that). | |
1778 | ||
1779 | =item Illegal octal digit %s | |
1780 | ||
1781 | (F) You used an 8 or 9 in an octal number. | |
1782 | ||
1783 | =item Illegal octal digit %s ignored | |
1784 | ||
1785 | (W digit) You may have tried to use an 8 or 9 in an octal number. | |
1786 | Interpretation of the octal number stopped before the 8 or 9. | |
1787 | ||
1788 | =item Illegal switch in PERL5OPT: %s | |
1789 | ||
1790 | (X) The PERL5OPT environment variable may only be used to set the | |
1791 | following switches: B<-[DIMUdmtw]>. | |
1792 | ||
1793 | =item Ill-formed CRTL environ value "%s" | |
1794 | ||
1795 | (W internal) A warning peculiar to VMS. Perl tried to read the CRTL's | |
1796 | internal environ array, and encountered an element without the C<=> | |
1797 | delimiter used to separate keys from values. The element is ignored. | |
1798 | ||
1799 | =item Ill-formed message in prime_env_iter: |%s| | |
1800 | ||
1801 | (W internal) A warning peculiar to VMS. Perl tried to read a logical | |
1802 | name or CLI symbol definition when preparing to iterate over %ENV, and | |
1803 | didn't see the expected delimiter between key and value, so the line was | |
1804 | ignored. | |
1805 | ||
1806 | =item (in cleanup) %s | |
1807 | ||
1808 | (W misc) This prefix usually indicates that a DESTROY() method raised | |
1809 | the indicated exception. Since destructors are usually called by the | |
1810 | system at arbitrary points during execution, and often a vast number of | |
1811 | times, the warning is issued only once for any number of failures that | |
1812 | would otherwise result in the same message being repeated. | |
1813 | ||
1814 | Failure of user callbacks dispatched using the C<G_KEEPERR> flag could | |
1815 | also result in this warning. See L<perlcall/G_KEEPERR>. | |
1816 | ||
1817 | =item In EBCDIC the v-string components cannot exceed 2147483647 | |
1818 | ||
1819 | (F) An error peculiar to EBCDIC. Internally, v-strings are stored as | |
1820 | Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC | |
1821 | encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF). | |
1822 | ||
1823 | =item Insecure dependency in %s | |
1824 | ||
1825 | (F) You tried to do something that the tainting mechanism didn't like. | |
1826 | The tainting mechanism is turned on when you're running setuid or | |
1827 | setgid, or when you specify B<-T> to turn it on explicitly. The | |
1828 | tainting mechanism labels all data that's derived directly or indirectly | |
1829 | from the user, who is considered to be unworthy of your trust. If any | |
1830 | such data is used in a "dangerous" operation, you get this error. See | |
1831 | L<perlsec> for more information. | |
1832 | ||
1833 | =item Insecure directory in %s | |
1834 | ||
1835 | (F) You can't use system(), exec(), or a piped open in a setuid or | |
1836 | setgid script if C<$ENV{PATH}> contains a directory that is writable by | |
1837 | the world. Also, the PATH must not contain any relative directory. | |
1838 | See L<perlsec>. | |
1839 | ||
1840 | =item Insecure $ENV{%s} while running %s | |
1841 | ||
1842 | (F) You can't use system(), exec(), or a piped open in a setuid or | |
1843 | setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>, | |
1844 | C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data | |
1845 | supplied (or potentially supplied) by the user. The script must set | |
1846 | the path to a known value, using trustworthy data. See L<perlsec>. | |
1847 | ||
1848 | =item Integer overflow in %s number | |
1849 | ||
1850 | (W overflow) The hexadecimal, octal or binary number you have specified | |
1851 | either as a literal or as an argument to hex() or oct() is too big for | |
1852 | your architecture, and has been converted to a floating point number. | |
1853 | On a 32-bit architecture the largest hexadecimal, octal or binary number | |
1854 | representable without overflow is 0xFFFFFFFF, 037777777777, or | |
1855 | 0b11111111111111111111111111111111 respectively. Note that Perl | |
1856 | transparently promotes all numbers to a floating point representation | |
1857 | internally--subject to loss of precision errors in subsequent | |
1858 | operations. | |
1859 | ||
1860 | =item Internal disaster in regex; marked by <-- HERE in m/%s/ | |
1861 | ||
1862 | (P) Something went badly wrong in the regular expression parser. | |
1863 | The <-- HERE shows in the regular expression about where the problem was | |
1864 | discovered. | |
1865 | ||
1866 | =item Internal inconsistency in tracking vforks | |
1867 | ||
1868 | (S) A warning peculiar to VMS. Perl keeps track of the number of times | |
1869 | you've called C<fork> and C<exec>, to determine whether the current call | |
1870 | to C<exec> should affect the current script or a subprocess (see | |
1871 | L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so | |
1872 | Perl is making a guess and treating this C<exec> as a request to | |
1873 | terminate the Perl script and execute the specified command. | |
1874 | ||
1875 | =item Internal urp in regex; marked by <-- HERE in m/%s/ | |
1876 | ||
1877 | (P) Something went badly awry in the regular expression parser. The | |
1878 | <-- HERE shows in the regular expression about where the problem was | |
1879 | discovered. | |
1880 | ||
1881 | =item %s (...) interpreted as function | |
1882 | ||
1883 | (W syntax) You've run afoul of the rule that says that any list operator | |
1884 | followed by parentheses turns into a function, with all the list | |
1885 | operators arguments found inside the parentheses. See | |
1886 | L<perlop/Terms and List Operators (Leftward)>. | |
1887 | ||
1888 | =item Invalid %s attribute: %s | |
1889 | ||
1890 | The indicated attribute for a subroutine or variable was not recognized | |
1891 | by Perl or by a user-supplied handler. See L<attributes>. | |
1892 | ||
1893 | =item Invalid %s attributes: %s | |
1894 | ||
1895 | The indicated attributes for a subroutine or variable were not | |
1896 | recognized by Perl or by a user-supplied handler. See L<attributes>. | |
1897 | ||
1898 | =item Invalid conversion in %s: "%s" | |
1899 | ||
1900 | (W printf) Perl does not understand the given format conversion. See | |
1901 | L<perlfunc/sprintf>. | |
1902 | ||
1903 | =item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/ | |
1904 | ||
1905 | (F) The range specified in a character class had a minimum character | |
1906 | greater than the maximum character. One possibility is that you forgot the | |
1907 | C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only | |
1908 | up to C<ff>. The <-- HERE shows in the regular expression about where the | |
1909 | problem was discovered. See L<perlre>. | |
1910 | ||
1911 | =item Invalid range "%s" in transliteration operator | |
1912 | ||
1913 | (F) The range specified in the tr/// or y/// operator had a minimum | |
1914 | character greater than the maximum character. See L<perlop>. | |
1915 | ||
1916 | =item Invalid separator character %s in attribute list | |
1917 | ||
1918 | (F) Something other than a colon or whitespace was seen between the | |
1919 | elements of an attribute list. If the previous attribute had a | |
1920 | parenthesised parameter list, perhaps that list was terminated too soon. | |
1921 | See L<attributes>. | |
1922 | ||
1923 | =item Invalid separator character %s in PerlIO layer specification %s | |
1924 | ||
1925 | (W layer) When pushing layers onto the Perl I/O system, something other than a | |
1926 | colon or whitespace was seen between the elements of a layer list. | |
1927 | If the previous attribute had a parenthesised parameter list, perhaps that | |
1928 | list was terminated too soon. | |
1929 | ||
1930 | =item Invalid type '%s' in %s | |
1931 | ||
1932 | (F) The given character is not a valid pack or unpack type. | |
1933 | See L<perlfunc/pack>. | |
1934 | (W) The given character is not a valid pack or unpack type but used to be | |
1935 | silently ignored. | |
1936 | ||
1937 | =item ioctl is not implemented | |
1938 | ||
1939 | (F) Your machine apparently doesn't implement ioctl(), which is pretty | |
1940 | strange for a machine that supports C. | |
1941 | ||
1942 | =item ioctl() on unopened %s | |
1943 | ||
1944 | (W unopened) You tried ioctl() on a filehandle that was never opened. | |
1945 | Check you control flow and number of arguments. | |
1946 | ||
1947 | =item IO layers (like "%s") unavailable | |
1948 | ||
1949 | (F) Your Perl has not been configured to have PerlIO, and therefore | |
1950 | you cannot use IO layers. To have PerlIO Perl must be configured | |
1951 | with 'useperlio'. | |
1952 | ||
1953 | =item IO::Socket::atmark not implemented on this architecture | |
1954 | ||
1955 | (F) Your machine doesn't implement the sockatmark() functionality, | |
1956 | neither as a system call or an ioctl call (SIOCATMARK). | |
1957 | ||
1958 | =item `%s' is not a code reference | |
1959 | ||
1960 | (W overload) The second (fourth, sixth, ...) argument of overload::constant | |
1961 | needs to be a code reference. Either an anonymous subroutine, or a reference | |
1962 | to a subroutine. | |
1963 | ||
1964 | =item `%s' is not an overloadable type | |
1965 | ||
1966 | (W overload) You tried to overload a constant type the overload package is | |
1967 | unaware of. | |
1968 | ||
1969 | =item junk on end of regexp | |
1970 | ||
1971 | (P) The regular expression parser is confused. | |
1972 | ||
1973 | =item Label not found for "last %s" | |
1974 | ||
1975 | (F) You named a loop to break out of, but you're not currently in a loop | |
1976 | of that name, not even if you count where you were called from. See | |
1977 | L<perlfunc/last>. | |
1978 | ||
1979 | =item Label not found for "next %s" | |
1980 | ||
1981 | (F) You named a loop to continue, but you're not currently in a loop of | |
1982 | that name, not even if you count where you were called from. See | |
1983 | L<perlfunc/last>. | |
1984 | ||
1985 | =item Label not found for "redo %s" | |
1986 | ||
1987 | (F) You named a loop to restart, but you're not currently in a loop of | |
1988 | that name, not even if you count where you were called from. See | |
1989 | L<perlfunc/last>. | |
1990 | ||
1991 | =item leaving effective %s failed | |
1992 | ||
1993 | (F) While under the C<use filetest> pragma, switching the real and | |
1994 | effective uids or gids failed. | |
1995 | ||
1996 | =item length/code after end of string in unpack | |
1997 | ||
1998 | (F) While unpacking, the string buffer was already used up when an unpack | |
1999 | length/code combination tried to obtain more data. This results in | |
2000 | an undefined value for the length. See L<perlfunc/pack>. | |
2001 | ||
2002 | =item listen() on closed socket %s | |
2003 | ||
2004 | (W closed) You tried to do a listen on a closed socket. Did you forget | |
2005 | to check the return value of your socket() call? See | |
2006 | L<perlfunc/listen>. | |
2007 | ||
2008 | =item Lookbehind longer than %d not implemented in regex; marked by <-- HERE in m/%s/ | |
2009 | ||
2010 | (F) There is currently a limit on the length of string which lookbehind can | |
2011 | handle. This restriction may be eased in a future release. The <-- HERE | |
2012 | shows in the regular expression about where the problem was discovered. | |
2013 | ||
2014 | =item lstat() on filehandle %s | |
2015 | ||
2016 | (W io) You tried to do an lstat on a filehandle. What did you mean | |
2017 | by that? lstat() makes sense only on filenames. (Perl did a fstat() | |
2018 | instead on the filehandle.) | |
2019 | ||
2020 | =item Lvalue subs returning %s not implemented yet | |
2021 | ||
2022 | (F) Due to limitations in the current implementation, array and hash | |
2023 | values cannot be returned in subroutines used in lvalue context. See | |
2024 | L<perlsub/"Lvalue subroutines">. | |
2025 | ||
2026 | =item Malformed integer in [] in pack | |
2027 | ||
2028 | (F) Between the brackets enclosing a numeric repeat count only digits | |
2029 | are permitted. See L<perlfunc/pack>. | |
2030 | ||
2031 | =item Malformed integer in [] in unpack | |
2032 | ||
2033 | (F) Between the brackets enclosing a numeric repeat count only digits | |
2034 | are permitted. See L<perlfunc/pack>. | |
2035 | ||
2036 | =item Malformed PERLLIB_PREFIX | |
2037 | ||
2038 | (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form | |
2039 | ||
2040 | prefix1;prefix2 | |
2041 | ||
2042 | or | |
2043 | prefix1 prefix2 | |
2044 | ||
2045 | with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of | |
2046 | a builtin library search path, prefix2 is substituted. The error may | |
2047 | appear if components are not found, or are too long. See | |
2048 | "PERLLIB_PREFIX" in L<perlos2>. | |
2049 | ||
2050 | =item Malformed prototype for %s: %s | |
2051 | ||
2052 | (F) You tried to use a function with a malformed prototype. The | |
2053 | syntax of function prototypes is given a brief compile-time check for | |
2054 | obvious errors like invalid characters. A more rigorous check is run | |
2055 | when the function is called. | |
2056 | ||
2057 | =item Malformed UTF-8 character (%s) | |
2058 | ||
2059 | (S utf8) (F) Perl detected something that didn't comply with UTF-8 | |
2060 | encoding rules. | |
2061 | ||
2062 | One possible cause is that you read in data that you thought to be in | |
2063 | UTF-8 but it wasn't (it was for example legacy 8-bit data). Another | |
2064 | possibility is careless use of utf8::upgrade(). | |
2065 | ||
2066 | =item Malformed UTF-16 surrogate | |
2067 | ||
2068 | Perl thought it was reading UTF-16 encoded character data but while | |
2069 | doing it Perl met a malformed Unicode surrogate. | |
2070 | ||
2071 | =item %s matches null string many times in regex; marked by <-- HERE in m/%s/ | |
2072 | ||
2073 | (W regexp) The pattern you've specified would be an infinite loop if the | |
2074 | regular expression engine didn't specifically check for that. The <-- HERE | |
2075 | shows in the regular expression about where the problem was discovered. | |
2076 | See L<perlre>. | |
2077 | ||
2078 | =item "%s" may clash with future reserved word | |
2079 | ||
2080 | (W) This warning may be due to running a perl5 script through a perl4 | |
2081 | interpreter, especially if the word that is being warned about is | |
2082 | "use" or "my". | |
2083 | ||
2084 | =item % may not be used in pack | |
2085 | ||
2086 | (F) You can't pack a string by supplying a checksum, because the | |
2087 | checksumming process loses information, and you can't go the other way. | |
2088 | See L<perlfunc/unpack>. | |
2089 | ||
2090 | =item Method for operation %s not found in package %s during blessing | |
2091 | ||
2092 | (F) An attempt was made to specify an entry in an overloading table that | |
2093 | doesn't resolve to a valid subroutine. See L<overload>. | |
2094 | ||
2095 | =item Method %s not permitted | |
2096 | ||
2097 | See Server error. | |
2098 | ||
2099 | =item Might be a runaway multi-line %s string starting on line %d | |
2100 | ||
2101 | (S) An advisory indicating that the previous error may have been caused | |
2102 | by a missing delimiter on a string or pattern, because it eventually | |
2103 | ended earlier on the current line. | |
2104 | ||
2105 | =item Misplaced _ in number | |
2106 | ||
2107 | (W syntax) An underscore (underbar) in a numeric constant did not | |
2108 | separate two digits. | |
2109 | ||
2110 | =item Missing argument to -%c | |
2111 | ||
2112 | (F) The argument to the indicated command line switch must follow | |
2113 | immediately after the switch, without intervening spaces. | |
2114 | ||
2115 | =item Missing %sbrace%s on \N{} | |
2116 | ||
2117 | (F) Wrong syntax of character name literal C<\N{charname}> within | |
2118 | double-quotish context. | |
2119 | ||
2120 | =item Missing comma after first argument to %s function | |
2121 | ||
2122 | (F) While certain functions allow you to specify a filehandle or an | |
2123 | "indirect object" before the argument list, this ain't one of them. | |
2124 | ||
2125 | =item Missing command in piped open | |
2126 | ||
2127 | (W pipe) You used the C<open(FH, "| command")> or | |
2128 | C<open(FH, "command |")> construction, but the command was missing or | |
2129 | blank. | |
2130 | ||
2131 | =item Missing control char name in \c | |
2132 | ||
2133 | (F) A double-quoted string ended with "\c", without the required control | |
2134 | character name. | |
2135 | ||
2136 | =item Missing name in "my sub" | |
2137 | ||
2138 | (F) The reserved syntax for lexically scoped subroutines requires that | |
2139 | they have a name with which they can be found. | |
2140 | ||
2141 | =item Missing $ on loop variable | |
2142 | ||
2143 | (F) Apparently you've been programming in B<csh> too much. Variables | |
2144 | are always mentioned with the $ in Perl, unlike in the shells, where it | |
2145 | can vary from one line to the next. | |
2146 | ||
2147 | =item (Missing operator before %s?) | |
2148 | ||
2149 | (S syntax) This is an educated guess made in conjunction with the message | |
2150 | "%s found where operator expected". Often the missing operator is a comma. | |
2151 | ||
2152 | =item Missing right brace on %s | |
2153 | ||
2154 | (F) Missing right brace in C<\p{...}> or C<\P{...}>. | |
2155 | ||
2156 | =item Missing right curly or square bracket | |
2157 | ||
2158 | (F) The lexer counted more opening curly or square brackets than closing | |
2159 | ones. As a general rule, you'll find it's missing near the place you | |
2160 | were last editing. | |
2161 | ||
2162 | =item (Missing semicolon on previous line?) | |
2163 | ||
2164 | (S syntax) This is an educated guess made in conjunction with the message | |
2165 | "%s found where operator expected". Don't automatically put a semicolon on | |
2166 | the previous line just because you saw this message. | |
2167 | ||
2168 | =item Modification of a read-only value attempted | |
2169 | ||
2170 | (F) You tried, directly or indirectly, to change the value of a | |
2171 | constant. You didn't, of course, try "2 = 1", because the compiler | |
2172 | catches that. But an easy way to do the same thing is: | |
2173 | ||
2174 | sub mod { $_[0] = 1 } | |
2175 | mod(2); | |
2176 | ||
2177 | Another way is to assign to a substr() that's off the end of the string. | |
2178 | ||
2179 | Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR> | |
2180 | is aliased to a constant in the look I<LIST>: | |
2181 | ||
2182 | $x = 1; | |
2183 | foreach my $n ($x, 2) { | |
2184 | $n *= 2; # modifies the $x, but fails on attempt to modify the 2 | |
2185 | } | |
2186 | ||
2187 | =item Modification of non-creatable array value attempted, %s | |
2188 | ||
2189 | (F) You tried to make an array value spring into existence, and the | |
2190 | subscript was probably negative, even counting from end of the array | |
2191 | backwards. | |
2192 | ||
2193 | =item Modification of non-creatable hash value attempted, %s | |
2194 | ||
2195 | (P) You tried to make a hash value spring into existence, and it | |
2196 | couldn't be created for some peculiar reason. | |
2197 | ||
2198 | =item Module name must be constant | |
2199 | ||
2200 | (F) Only a bare module name is allowed as the first argument to a "use". | |
2201 | ||
2202 | =item Module name required with -%c option | |
2203 | ||
2204 | (F) The C<-M> or C<-m> options say that Perl should load some module, but | |
2205 | you omitted the name of the module. Consult L<perlrun> for full details | |
2206 | about C<-M> and C<-m>. | |
2207 | ||
2208 | =item More than one argument to open | |
2209 | ||
2210 | (F) The C<open> function has been asked to open multiple files. This | |
2211 | can happen if you are trying to open a pipe to a command that takes a | |
2212 | list of arguments, but have forgotten to specify a piped open mode. | |
2213 | See L<perlfunc/open> for details. | |
2214 | ||
2215 | =item msg%s not implemented | |
2216 | ||
2217 | (F) You don't have System V message IPC on your system. | |
2218 | ||
2219 | =item Multidimensional syntax %s not supported | |
2220 | ||
2221 | (W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>. | |
2222 | They're written like C<$foo[1][2][3]>, as in C. | |
2223 | ||
2224 | =item '/' must be followed by 'a*', 'A*' or 'Z*' | |
2225 | ||
2226 | (F) You had a pack template indicating a counted-length string, | |
2227 | Currently the only things that can have their length counted are a*, A* | |
2228 | or Z*. See L<perlfunc/pack>. | |
2229 | ||
2230 | =item '/' must follow a numeric type in unpack | |
2231 | ||
2232 | (F) You had an unpack template that contained a '/', but this did not | |
2233 | follow some unpack specification producing a numeric value. | |
2234 | See L<perlfunc/pack>. | |
2235 | ||
2236 | =item "my sub" not yet implemented | |
2237 | ||
2238 | (F) Lexically scoped subroutines are not yet implemented. Don't try | |
2239 | that yet. | |
2240 | ||
2241 | =item "my" variable %s can't be in a package | |
2242 | ||
2243 | (F) Lexically scoped variables aren't in a package, so it doesn't make | |
2244 | sense to try to declare one with a package qualifier on the front. Use | |
2245 | local() if you want to localize a package variable. | |
2246 | ||
2247 | =item Name "%s::%s" used only once: possible typo | |
2248 | ||
2249 | (W once) Typographical errors often show up as unique variable names. | |
2250 | If you had a good reason for having a unique name, then just mention it | |
2251 | again somehow to suppress the message. The C<our> declaration is | |
2252 | provided for this purpose. | |
2253 | ||
2254 | NOTE: This warning detects symbols that have been used only once so $c, @c, | |
2255 | %c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered | |
2256 | the same; if a program uses $c only once but also uses any of the others it | |
2257 | will not trigger this warning. | |
2258 | ||
2259 | =item Negative '/' count in unpack | |
2260 | ||
2261 | (F) The length count obtained from a length/code unpack operation was | |
2262 | negative. See L<perlfunc/pack>. | |
2263 | ||
2264 | =item Negative length | |
2265 | ||
2266 | (F) You tried to do a read/write/send/recv operation with a buffer | |
2267 | length that is less than 0. This is difficult to imagine. | |
2268 | ||
2269 | =item Negative offset to vec in lvalue context | |
2270 | ||
2271 | (F) When C<vec> is called in an lvalue context, the second argument must be | |
2272 | greater than or equal to zero. | |
2273 | ||
2274 | =item Nested quantifiers in regex; marked by <-- HERE in m/%s/ | |
2275 | ||
2276 | (F) You can't quantify a quantifier without intervening parentheses. So | |
2277 | things like ** or +* or ?* are illegal. The <-- HERE shows in the regular | |
2278 | expression about where the problem was discovered. | |
2279 | ||
2280 | Note that the minimal matching quantifiers, C<*?>, C<+?>, and | |
2281 | C<??> appear to be nested quantifiers, but aren't. See L<perlre>. | |
2282 | ||
2283 | =item %s never introduced | |
2284 | ||
2285 | (S internal) The symbol in question was declared but somehow went out of | |
2286 | scope before it could possibly have been used. | |
2287 | ||
2288 | =item Newline in left-justified string for %s | |
2289 | ||
2290 | (W printf) There is a newline in a string to be left justified by | |
2291 | C<printf> or C<sprintf>. | |
2292 | ||
2293 | The padding spaces will appear after the newline, which is probably not | |
2294 | what you wanted. Usually you should remove the newline from the string | |
2295 | and put formatting characters in the C<sprintf> format. | |
2296 | ||
2297 | =item No %s allowed while running setuid | |
2298 | ||
2299 | (F) Certain operations are deemed to be too insecure for a setuid or | |
2300 | setgid script to even be allowed to attempt. Generally speaking there | |
2301 | will be another way to do what you want that is, if not secure, at least | |
2302 | securable. See L<perlsec>. | |
2303 | ||
2304 | =item No comma allowed after %s | |
2305 | ||
2306 | (F) A list operator that has a filehandle or "indirect object" is not | |
2307 | allowed to have a comma between that and the following arguments. | |
2308 | Otherwise it'd be just another one of the arguments. | |
2309 | ||
2310 | One possible cause for this is that you expected to have imported a | |
2311 | constant to your name space with B<use> or B<import> while no such | |
2312 | importing took place, it may for example be that your operating system | |
2313 | does not support that particular constant. Hopefully you did use an | |
2314 | explicit import list for the constants you expect to see, please see | |
2315 | L<perlfunc/use> and L<perlfunc/import>. While an explicit import list | |
2316 | would probably have caught this error earlier it naturally does not | |
2317 | remedy the fact that your operating system still does not support that | |
2318 | constant. Maybe you have a typo in the constants of the symbol import | |
2319 | list of B<use> or B<import> or in the constant name at the line where | |
2320 | this error was triggered? | |
2321 | ||
2322 | =item No command into which to pipe on command line | |
2323 | ||
2324 | (F) An error peculiar to VMS. Perl handles its own command line | |
2325 | redirection, and found a '|' at the end of the command line, so it | |
2326 | doesn't know where you want to pipe the output from this command. | |
2327 | ||
2328 | =item No DB::DB routine defined | |
2329 | ||
2330 | (F) The currently executing code was compiled with the B<-d> switch, but | |
2331 | for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::> | |
2332 | module) didn't define a routine to be called at the beginning of each | |
2333 | statement. | |
2334 | ||
2335 | =item No dbm on this machine | |
2336 | ||
2337 | (P) This is counted as an internal error, because every machine should | |
2338 | supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>. | |
2339 | ||
2340 | =item No DB::sub routine defined | |
2341 | ||
2342 | (F) The currently executing code was compiled with the B<-d> switch, but | |
2343 | for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::> | |
2344 | module) didn't define a C<DB::sub> routine to be called at the beginning | |
2345 | of each ordinary subroutine call. | |
2346 | ||
2347 | =item No B<-e> allowed in setuid scripts | |
2348 | ||
2349 | (F) A setuid script can't be specified by the user. | |
2350 | ||
2351 | =item No error file after 2> or 2>> on command line | |
2352 | ||
2353 | (F) An error peculiar to VMS. Perl handles its own command line | |
2354 | redirection, and found a '2>' or a '2>>' on the command line, but can't | |
2355 | find the name of the file to which to write data destined for stderr. | |
2356 | ||
2357 | =item No group ending character '%c' found in template | |
2358 | ||
2359 | (F) A pack or unpack template has an opening '(' or '[' without its | |
2360 | matching counterpart. See L<perlfunc/pack>. | |
2361 | ||
2362 | =item No input file after < on command line | |
2363 | ||
2364 | (F) An error peculiar to VMS. Perl handles its own command line | |
2365 | redirection, and found a '<' on the command line, but can't find the | |
2366 | name of the file from which to read data for stdin. | |
2367 | ||
2368 | =item No #! line | |
2369 | ||
2370 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2371 | even on machines that don't support the #! construct. | |
2372 | ||
2373 | =item "no" not allowed in expression | |
2374 | ||
2375 | (F) The "no" keyword is recognized and executed at compile time, and | |
2376 | returns no useful value. See L<perlmod>. | |
2377 | ||
2378 | =item No output file after > on command line | |
2379 | ||
2380 | (F) An error peculiar to VMS. Perl handles its own command line | |
2381 | redirection, and found a lone '>' at the end of the command line, so it | |
2382 | doesn't know where you wanted to redirect stdout. | |
2383 | ||
2384 | =item No output file after > or >> on command line | |
2385 | ||
2386 | (F) An error peculiar to VMS. Perl handles its own command line | |
2387 | redirection, and found a '>' or a '>>' on the command line, but can't | |
2388 | find the name of the file to which to write data destined for stdout. | |
2389 | ||
2390 | =item No package name allowed for variable %s in "our" | |
2391 | ||
2392 | (F) Fully qualified variable names are not allowed in "our" | |
2393 | declarations, because that doesn't make much sense under existing | |
2394 | semantics. Such syntax is reserved for future extensions. | |
2395 | ||
2396 | =item No Perl script found in input | |
2397 | ||
2398 | (F) You called C<perl -x>, but no line was found in the file beginning | |
2399 | with #! and containing the word "perl". | |
2400 | ||
2401 | =item No setregid available | |
2402 | ||
2403 | (F) Configure didn't find anything resembling the setregid() call for | |
2404 | your system. | |
2405 | ||
2406 | =item No setreuid available | |
2407 | ||
2408 | (F) Configure didn't find anything resembling the setreuid() call for | |
2409 | your system. | |
2410 | ||
2411 | =item No %s specified for -%c | |
2412 | ||
2413 | (F) The indicated command line switch needs a mandatory argument, but | |
2414 | you haven't specified one. | |
2415 | ||
2416 | =item No such class %s | |
2417 | ||
2418 | (F) You provided a class qualifier in a "my" or "our" declaration, but | |
2419 | this class doesn't exist at this point in your program. | |
2420 | ||
2421 | =item No such pipe open | |
2422 | ||
2423 | (P) An error peculiar to VMS. The internal routine my_pclose() tried to | |
2424 | close a pipe which hadn't been opened. This should have been caught | |
2425 | earlier as an attempt to close an unopened filehandle. | |
2426 | ||
2427 | =item No such pseudo-hash field "%s" | |
2428 | ||
2429 | (F) You tried to access an array as a hash, but the field name used is | |
2430 | not defined. The hash at index 0 should map all valid field names to | |
2431 | array indices for that to work. | |
2432 | ||
2433 | =item No such pseudo-hash field "%s" in variable %s of type %s | |
2434 | ||
2435 | (F) You tried to access a field of a typed variable where the type does | |
2436 | not know about the field name. The field names are looked up in the | |
2437 | %FIELDS hash in the type package at compile time. The %FIELDS hash is | |
2438 | %usually set up with the 'fields' pragma. | |
2439 | ||
2440 | =item No such signal: SIG%s | |
2441 | ||
2442 | (W signal) You specified a signal name as a subscript to %SIG that was | |
2443 | not recognized. Say C<kill -l> in your shell to see the valid signal | |
2444 | names on your system. | |
2445 | ||
2446 | =item Not a CODE reference | |
2447 | ||
2448 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2449 | subroutine), but found a reference to something else instead. You can | |
2450 | use the ref() function to find out what kind of ref it really was. See | |
2451 | also L<perlref>. | |
2452 | ||
2453 | =item Not a format reference | |
2454 | ||
2455 | (F) I'm not sure how you managed to generate a reference to an anonymous | |
2456 | format, but this indicates you did, and that it didn't exist. | |
2457 | ||
2458 | =item Not a GLOB reference | |
2459 | ||
2460 | (F) Perl was trying to evaluate a reference to a "typeglob" (that is, a | |
2461 | symbol table entry that looks like C<*foo>), but found a reference to | |
2462 | something else instead. You can use the ref() function to find out what | |
2463 | kind of ref it really was. See L<perlref>. | |
2464 | ||
2465 | =item Not a HASH reference | |
2466 | ||
2467 | (F) Perl was trying to evaluate a reference to a hash value, but found a | |
2468 | reference to something else instead. You can use the ref() function to | |
2469 | find out what kind of ref it really was. See L<perlref>. | |
2470 | ||
2471 | =item Not an ARRAY reference | |
2472 | ||
2473 | (F) Perl was trying to evaluate a reference to an array value, but found | |
2474 | a reference to something else instead. You can use the ref() function | |
2475 | to find out what kind of ref it really was. See L<perlref>. | |
2476 | ||
2477 | =item Not a perl script | |
2478 | ||
2479 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2480 | even on machines that don't support the #! construct. The line must | |
2481 | mention perl. | |
2482 | ||
2483 | =item Not a SCALAR reference | |
2484 | ||
2485 | (F) Perl was trying to evaluate a reference to a scalar value, but found | |
2486 | a reference to something else instead. You can use the ref() function | |
2487 | to find out what kind of ref it really was. See L<perlref>. | |
2488 | ||
2489 | =item Not a subroutine reference | |
2490 | ||
2491 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2492 | subroutine), but found a reference to something else instead. You can | |
2493 | use the ref() function to find out what kind of ref it really was. See | |
2494 | also L<perlref>. | |
2495 | ||
2496 | =item Not a subroutine reference in overload table | |
2497 | ||
2498 | (F) An attempt was made to specify an entry in an overloading table that | |
2499 | doesn't somehow point to a valid subroutine. See L<overload>. | |
2500 | ||
2501 | =item Not enough arguments for %s | |
2502 | ||
2503 | (F) The function requires more arguments than you specified. | |
2504 | ||
2505 | =item Not enough format arguments | |
2506 | ||
2507 | (W syntax) A format specified more picture fields than the next line | |
2508 | supplied. See L<perlform>. | |
2509 | ||
2510 | =item %s: not found | |
2511 | ||
2512 | (A) You've accidentally run your script through the Bourne shell instead | |
2513 | of Perl. Check the #! line, or manually feed your script into Perl | |
2514 | yourself. | |
2515 | ||
2516 | =item no UTC offset information; assuming local time is UTC | |
2517 | ||
2518 | (S) A warning peculiar to VMS. Perl was unable to find the local | |
2519 | timezone offset, so it's assuming that local system time is equivalent | |
2520 | to UTC. If it's not, define the logical name | |
2521 | F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which | |
2522 | need to be added to UTC to get local time. | |
2523 | ||
2524 | =item Non-string passed as bitmask | |
2525 | ||
2526 | (W misc) A number has been passed as a bitmask argument to select(). | |
2527 | Use the vec() function to construct the file descriptor bitmasks for | |
2528 | select. See L<perlfunc/select> | |
2529 | ||
2530 | =item Null filename used | |
2531 | ||
2532 | (F) You can't require the null filename, especially because on many | |
2533 | machines that means the current directory! See L<perlfunc/require>. | |
2534 | ||
2535 | =item NULL OP IN RUN | |
2536 | ||
2537 | (P debugging) Some internal routine called run() with a null opcode | |
2538 | pointer. | |
2539 | ||
2540 | =item Null picture in formline | |
2541 | ||
2542 | (F) The first argument to formline must be a valid format picture | |
2543 | specification. It was found to be empty, which probably means you | |
2544 | supplied it an uninitialized value. See L<perlform>. | |
2545 | ||
2546 | =item Null realloc | |
2547 | ||
2548 | (P) An attempt was made to realloc NULL. | |
2549 | ||
2550 | =item NULL regexp argument | |
2551 | ||
2552 | (P) The internal pattern matching routines blew it big time. | |
2553 | ||
2554 | =item NULL regexp parameter | |
2555 | ||
2556 | (P) The internal pattern matching routines are out of their gourd. | |
2557 | ||
2558 | =item Number too long | |
2559 | ||
2560 | (F) Perl limits the representation of decimal numbers in programs to | |
2561 | about 250 characters. You've exceeded that length. Future | |
2562 | versions of Perl are likely to eliminate this arbitrary limitation. In | |
2563 | the meantime, try using scientific notation (e.g. "1e6" instead of | |
2564 | "1_000_000"). | |
2565 | ||
2566 | =item Octal number in vector unsupported | |
2567 | ||
2568 | (F) Numbers with a leading C<0> are not currently allowed in vectors. | |
2569 | The octal number interpretation of such numbers may be supported in a | |
2570 | future version. | |
2571 | ||
2572 | =item Octal number > 037777777777 non-portable | |
2573 | ||
2574 | (W portable) The octal number you specified is larger than 2**32-1 | |
2575 | (4294967295) and therefore non-portable between systems. See | |
2576 | L<perlport> for more on portability concerns. | |
2577 | ||
2578 | See also L<perlport> for writing portable code. | |
2579 | ||
2580 | =item Odd number of arguments for overload::constant | |
2581 | ||
2582 | (W overload) The call to overload::constant contained an odd number of | |
2583 | arguments. The arguments should come in pairs. | |
2584 | ||
2585 | =item Odd number of elements in anonymous hash | |
2586 | ||
2587 | (W misc) You specified an odd number of elements to initialize a hash, | |
2588 | which is odd, because hashes come in key/value pairs. | |
2589 | ||
2590 | =item Odd number of elements in hash assignment | |
2591 | ||
2592 | (W misc) You specified an odd number of elements to initialize a hash, | |
2593 | which is odd, because hashes come in key/value pairs. | |
2594 | ||
2595 | =item Offset outside string | |
2596 | ||
2597 | (F) You tried to do a read/write/send/recv operation with an offset | |
2598 | pointing outside the buffer. This is difficult to imagine. The sole | |
2599 | exception to this is that C<sysread()>ing past the buffer will extend | |
2600 | the buffer and zero pad the new area. | |
2601 | ||
2602 | =item %s() on unopened %s | |
2603 | ||
2604 | (W unopened) An I/O operation was attempted on a filehandle that was | |
2605 | never initialized. You need to do an open(), a sysopen(), or a socket() | |
2606 | call, or call a constructor from the FileHandle package. | |
2607 | ||
2608 | =item -%s on unopened filehandle %s | |
2609 | ||
2610 | (W unopened) You tried to invoke a file test operator on a filehandle | |
2611 | that isn't open. Check your control flow. See also L<perlfunc/-X>. | |
2612 | ||
2613 | =item oops: oopsAV | |
2614 | ||
2615 | (S internal) An internal warning that the grammar is screwed up. | |
2616 | ||
2617 | =item oops: oopsHV | |
2618 | ||
2619 | (S internal) An internal warning that the grammar is screwed up. | |
2620 | ||
2621 | =item Operation "%s": no method found, %s | |
2622 | ||
2623 | (F) An attempt was made to perform an overloaded operation for which no | |
2624 | handler was defined. While some handlers can be autogenerated in terms | |
2625 | of other handlers, there is no default handler for any operation, unless | |
2626 | C<fallback> overloading key is specified to be true. See L<overload>. | |
2627 | ||
2628 | =item Operator or semicolon missing before %s | |
2629 | ||
2630 | (S ambiguous) You used a variable or subroutine call where the parser | |
2631 | was expecting an operator. The parser has assumed you really meant to | |
2632 | use an operator, but this is highly likely to be incorrect. For | |
2633 | example, if you say "*foo *foo" it will be interpreted as if you said | |
2634 | "*foo * 'foo'". | |
2635 | ||
2636 | =item "our" variable %s redeclared | |
2637 | ||
2638 | (W misc) You seem to have already declared the same global once before | |
2639 | in the current lexical scope. | |
2640 | ||
2641 | =item Out of memory! | |
2642 | ||
2643 | (X) The malloc() function returned 0, indicating there was insufficient | |
2644 | remaining memory (or virtual memory) to satisfy the request. Perl has | |
2645 | no option but to exit immediately. | |
2646 | ||
2647 | At least in Unix you may be able to get past this by increasing your | |
2648 | process datasize limits: in csh/tcsh use C<limit> and | |
2649 | C<limit datasize n> (where C<n> is the number of kilobytes) to check | |
2650 | the current limits and change them, and in ksh/bash/zsh use C<ulimit -a> | |
2651 | and C<ulimit -d n>, respectively. | |
2652 | ||
2653 | =item Out of memory during %s extend | |
2654 | ||
2655 | (X) An attempt was made to extend an array, a list, or a string beyond | |
2656 | the largest possible memory allocation. | |
2657 | ||
2658 | =item Out of memory during "large" request for %s | |
2659 | ||
2660 | (F) The malloc() function returned 0, indicating there was insufficient | |
2661 | remaining memory (or virtual memory) to satisfy the request. However, | |
2662 | the request was judged large enough (compile-time default is 64K), so a | |
2663 | possibility to shut down by trapping this error is granted. | |
2664 | ||
2665 | =item Out of memory during request for %s | |
2666 | ||
2667 | (X|F) The malloc() function returned 0, indicating there was | |
2668 | insufficient remaining memory (or virtual memory) to satisfy the | |
2669 | request. | |
2670 | ||
2671 | The request was judged to be small, so the possibility to trap it | |
2672 | depends on the way perl was compiled. By default it is not trappable. | |
2673 | However, if compiled for this, Perl may use the contents of C<$^M> as an | |
2674 | emergency pool after die()ing with this message. In this case the error | |
2675 | is trappable I<once>, and the error message will include the line and file | |
2676 | where the failed request happened. | |
2677 | ||
2678 | =item Out of memory during ridiculously large request | |
2679 | ||
2680 | (F) You can't allocate more than 2^31+"small amount" bytes. This error | |
2681 | is most likely to be caused by a typo in the Perl program. e.g., | |
2682 | C<$arr[time]> instead of C<$arr[$time]>. | |
2683 | ||
2684 | =item Out of memory for yacc stack | |
2685 | ||
2686 | (F) The yacc parser wanted to grow its stack so it could continue | |
2687 | parsing, but realloc() wouldn't give it more memory, virtual or | |
2688 | otherwise. | |
2689 | ||
2690 | =item '@' outside of string in unpack | |
2691 | ||
2692 | (F) You had a template that specified an absolute position outside | |
2693 | the string being unpacked. See L<perlfunc/pack>. | |
2694 | ||
2695 | =item %s package attribute may clash with future reserved word: %s | |
2696 | ||
2697 | (W reserved) A lowercase attribute name was used that had a | |
2698 | package-specific handler. That name might have a meaning to Perl itself | |
2699 | some day, even though it doesn't yet. Perhaps you should use a | |
2700 | mixed-case attribute name, instead. See L<attributes>. | |
2701 | ||
2702 | =item pack/unpack repeat count overflow | |
2703 | ||
2704 | (F) You can't specify a repeat count so large that it overflows your | |
2705 | signed integers. See L<perlfunc/pack>. | |
2706 | ||
2707 | =item page overflow | |
2708 | ||
2709 | (W io) A single call to write() produced more lines than can fit on a | |
2710 | page. See L<perlform>. | |
2711 | ||
2712 | =item panic: %s | |
2713 | ||
2714 | (P) An internal error. | |
2715 | ||
2716 | =item panic: ck_grep | |
2717 | ||
2718 | (P) Failed an internal consistency check trying to compile a grep. | |
2719 | ||
2720 | =item panic: ck_split | |
2721 | ||
2722 | (P) Failed an internal consistency check trying to compile a split. | |
2723 | ||
2724 | =item panic: corrupt saved stack index | |
2725 | ||
2726 | (P) The savestack was requested to restore more localized values than | |
2727 | there are in the savestack. | |
2728 | ||
2729 | =item panic: del_backref | |
2730 | ||
2731 | (P) Failed an internal consistency check while trying to reset a weak | |
2732 | reference. | |
2733 | ||
2734 | =item panic: Devel::DProf inconsistent subroutine return | |
2735 | ||
2736 | (P) Devel::DProf called a subroutine that exited using goto(LABEL), | |
2737 | last(LABEL) or next(LABEL). Leaving that way a subroutine called from | |
2738 | an XSUB will lead very probably to a crash of the interpreter. This is | |
2739 | a bug that will hopefully one day get fixed. | |
2740 | ||
2741 | =item panic: die %s | |
2742 | ||
2743 | (P) We popped the context stack to an eval context, and then discovered | |
2744 | it wasn't an eval context. | |
2745 | ||
2746 | =item panic: do_subst | |
2747 | ||
2748 | (P) The internal pp_subst() routine was called with invalid operational | |
2749 | data. | |
2750 | ||
2751 | =item panic: do_trans_%s | |
2752 | ||
2753 | (P) The internal do_trans routines were called with invalid operational | |
2754 | data. | |
2755 | ||
2756 | =item panic: frexp | |
2757 | ||
2758 | (P) The library function frexp() failed, making printf("%f") impossible. | |
2759 | ||
2760 | =item panic: goto | |
2761 | ||
2762 | (P) We popped the context stack to a context with the specified label, | |
2763 | and then discovered it wasn't a context we know how to do a goto in. | |
2764 | ||
2765 | =item panic: INTERPCASEMOD | |
2766 | ||
2767 | (P) The lexer got into a bad state at a case modifier. | |
2768 | ||
2769 | =item panic: INTERPCONCAT | |
2770 | ||
2771 | (P) The lexer got into a bad state parsing a string with brackets. | |
2772 | ||
2773 | =item panic: kid popen errno read | |
2774 | ||
2775 | (F) forked child returned an incomprehensible message about its errno. | |
2776 | ||
2777 | =item panic: last | |
2778 | ||
2779 | (P) We popped the context stack to a block context, and then discovered | |
2780 | it wasn't a block context. | |
2781 | ||
2782 | =item panic: leave_scope clearsv | |
2783 | ||
2784 | (P) A writable lexical variable became read-only somehow within the | |
2785 | scope. | |
2786 | ||
2787 | =item panic: leave_scope inconsistency | |
2788 | ||
2789 | (P) The savestack probably got out of sync. At least, there was an | |
2790 | invalid enum on the top of it. | |
2791 | ||
2792 | =item panic: magic_killbackrefs | |
2793 | ||
2794 | (P) Failed an internal consistency check while trying to reset all weak | |
2795 | references to an object. | |
2796 | ||
2797 | =item panic: malloc | |
2798 | ||
2799 | (P) Something requested a negative number of bytes of malloc. | |
2800 | ||
2801 | =item panic: mapstart | |
2802 | ||
2803 | (P) The compiler is screwed up with respect to the map() function. | |
2804 | ||
2805 | =item panic: memory wrap | |
2806 | ||
2807 | (P) Something tried to allocate more memory than possible. | |
2808 | ||
2809 | =item panic: null array | |
2810 | ||
2811 | (P) One of the internal array routines was passed a null AV pointer. | |
2812 | ||
2813 | =item panic: pad_alloc | |
2814 | ||
2815 | (P) The compiler got confused about which scratch pad it was allocating | |
2816 | and freeing temporaries and lexicals from. | |
2817 | ||
2818 | =item panic: pad_free curpad | |
2819 | ||
2820 | (P) The compiler got confused about which scratch pad it was allocating | |
2821 | and freeing temporaries and lexicals from. | |
2822 | ||
2823 | =item panic: pad_free po | |
2824 | ||
2825 | (P) An invalid scratch pad offset was detected internally. | |
2826 | ||
2827 | =item panic: pad_reset curpad | |
2828 | ||
2829 | (P) The compiler got confused about which scratch pad it was allocating | |
2830 | and freeing temporaries and lexicals from. | |
2831 | ||
2832 | =item panic: pad_sv po | |
2833 | ||
2834 | (P) An invalid scratch pad offset was detected internally. | |
2835 | ||
2836 | =item panic: pad_swipe curpad | |
2837 | ||
2838 | (P) The compiler got confused about which scratch pad it was allocating | |
2839 | and freeing temporaries and lexicals from. | |
2840 | ||
2841 | =item panic: pad_swipe po | |
2842 | ||
2843 | (P) An invalid scratch pad offset was detected internally. | |
2844 | ||
2845 | =item panic: pp_iter | |
2846 | ||
2847 | (P) The foreach iterator got called in a non-loop context frame. | |
2848 | ||
2849 | =item panic: pp_match%s | |
2850 | ||
2851 | (P) The internal pp_match() routine was called with invalid operational | |
2852 | data. | |
2853 | ||
2854 | =item panic: pp_split | |
2855 | ||
2856 | (P) Something terrible went wrong in setting up for the split. | |
2857 | ||
2858 | =item panic: realloc | |
2859 | ||
2860 | (P) Something requested a negative number of bytes of realloc. | |
2861 | ||
2862 | =item panic: restartop | |
2863 | ||
2864 | (P) Some internal routine requested a goto (or something like it), and | |
2865 | didn't supply the destination. | |
2866 | ||
2867 | =item panic: return | |
2868 | ||
2869 | (P) We popped the context stack to a subroutine or eval context, and | |
2870 | then discovered it wasn't a subroutine or eval context. | |
2871 | ||
2872 | =item panic: scan_num | |
2873 | ||
2874 | (P) scan_num() got called on something that wasn't a number. | |
2875 | ||
2876 | =item panic: sv_insert | |
2877 | ||
2878 | (P) The sv_insert() routine was told to remove more string than there | |
2879 | was string. | |
2880 | ||
2881 | =item panic: top_env | |
2882 | ||
2883 | (P) The compiler attempted to do a goto, or something weird like that. | |
2884 | ||
2885 | =item panic: utf16_to_utf8: odd bytelen | |
2886 | ||
2887 | (P) Something tried to call utf16_to_utf8 with an odd (as opposed | |
2888 | to even) byte length. | |
2889 | ||
2890 | =item panic: yylex | |
2891 | ||
2892 | (P) The lexer got into a bad state while processing a case modifier. | |
2893 | ||
2894 | =item Parentheses missing around "%s" list | |
2895 | ||
2896 | (W parenthesis) You said something like | |
2897 | ||
2898 | my $foo, $bar = @_; | |
2899 | ||
2900 | when you meant | |
2901 | ||
2902 | my ($foo, $bar) = @_; | |
2903 | ||
2904 | Remember that "my", "our", and "local" bind tighter than comma. | |
2905 | ||
2906 | =item C<-p> destination: %s | |
2907 | ||
2908 | (F) An error occurred during the implicit output invoked by the C<-p> | |
2909 | command-line switch. (This output goes to STDOUT unless you've | |
2910 | redirected it with select().) | |
2911 | ||
2912 | =item (perhaps you forgot to load "%s"?) | |
2913 | ||
2914 | (F) This is an educated guess made in conjunction with the message | |
2915 | "Can't locate object method \"%s\" via package \"%s\"". It often means | |
2916 | that a method requires a package that has not been loaded. | |
2917 | ||
2918 | =item Perl %s required--this is only version %s, stopped | |
2919 | ||
2920 | (F) The module in question uses features of a version of Perl more | |
2921 | recent than the currently running version. How long has it been since | |
2922 | you upgraded, anyway? See L<perlfunc/require>. | |
2923 | ||
2924 | =item PERL_SH_DIR too long | |
2925 | ||
2926 | (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the | |
2927 | C<sh>-shell in. See "PERL_SH_DIR" in L<perlos2>. | |
2928 | ||
2929 | =item PERL_SIGNALS illegal: "%s" | |
2930 | ||
2931 | See L<perlrun/PERL_SIGNALS> for legal values. | |
2932 | ||
2933 | =item perl: warning: Setting locale failed. | |
2934 | ||
2935 | (S) The whole warning message will look something like: | |
2936 | ||
2937 | perl: warning: Setting locale failed. | |
2938 | perl: warning: Please check that your locale settings: | |
2939 | LC_ALL = "En_US", | |
2940 | LANG = (unset) | |
2941 | are supported and installed on your system. | |
2942 | perl: warning: Falling back to the standard locale ("C"). | |
2943 | ||
2944 | Exactly what were the failed locale settings varies. In the above the | |
2945 | settings were that the LC_ALL was "En_US" and the LANG had no value. | |
2946 | This error means that Perl detected that you and/or your operating | |
2947 | system supplier and/or system administrator have set up the so-called | |
2948 | locale system but Perl could not use those settings. This was not | |
2949 | dead serious, fortunately: there is a "default locale" called "C" that | |
2950 | Perl can and will use, the script will be run. Before you really fix | |
2951 | the problem, however, you will get the same error message each time | |
2952 | you run Perl. How to really fix the problem can be found in | |
2953 | L<perllocale> section B<LOCALE PROBLEMS>. | |
2954 | ||
2955 | =item Permission denied | |
2956 | ||
2957 | (F) The setuid emulator in suidperl decided you were up to no good. | |
2958 | ||
2959 | =item pid %x not a child | |
2960 | ||
2961 | (W exec) A warning peculiar to VMS. Waitpid() was asked to wait for a | |
2962 | process which isn't a subprocess of the current process. While this is | |
2963 | fine from VMS' perspective, it's probably not what you intended. | |
2964 | ||
2965 | =item 'P' must have an explicit size in unpack | |
2966 | ||
2967 | (F) The unpack format P must have an explicit size, not "*". | |
2968 | ||
2969 | =item B<-P> not allowed for setuid/setgid script | |
2970 | ||
2971 | (F) The script would have to be opened by the C preprocessor by name, | |
2972 | which provides a race condition that breaks security. | |
2973 | ||
2974 | =item POSIX class [:%s:] unknown in regex; marked by <-- HERE in m/%s/ | |
2975 | ||
2976 | (F) The class in the character class [: :] syntax is unknown. The <-- HERE | |
2977 | shows in the regular expression about where the problem was discovered. | |
2978 | Note that the POSIX character classes do B<not> have the C<is> prefix | |
2979 | the corresponding C interfaces have: in other words, it's C<[[:print:]]>, | |
2980 | not C<isprint>. See L<perlre>. | |
2981 | ||
2982 | =item POSIX getpgrp can't take an argument | |
2983 | ||
2984 | (F) Your system has POSIX getpgrp(), which takes no argument, unlike | |
2985 | the BSD version, which takes a pid. | |
2986 | ||
2987 | =item POSIX syntax [%s] belongs inside character classes in regex; marked by <-- HERE in m/%s/ | |
2988 | ||
2989 | (W regexp) The character class constructs [: :], [= =], and [. .] go | |
2990 | I<inside> character classes, the [] are part of the construct, for example: | |
2991 | /[012[:alpha:]345]/. Note that [= =] and [. .] are not currently | |
2992 | implemented; they are simply placeholders for future extensions and will | |
2993 | cause fatal errors. The <-- HERE shows in the regular expression about | |
2994 | where the problem was discovered. See L<perlre>. | |
2995 | ||
2996 | =item POSIX syntax [. .] is reserved for future extensions in regex; marked by <-- HERE in m/%s/ | |
2997 | ||
2998 | (F regexp) Within regular expression character classes ([]) the syntax | |
2999 | beginning with "[." and ending with ".]" is reserved for future extensions. | |
3000 | If you need to represent those character sequences inside a regular | |
3001 | expression character class, just quote the square brackets with the | |
3002 | backslash: "\[." and ".\]". The <-- HERE shows in the regular expression | |
3003 | about where the problem was discovered. See L<perlre>. | |
3004 | ||
3005 | =item POSIX syntax [= =] is reserved for future extensions in regex; marked by <-- HERE in m/%s/ | |
3006 | ||
3007 | (F) Within regular expression character classes ([]) the syntax beginning | |
3008 | with "[=" and ending with "=]" is reserved for future extensions. If you | |
3009 | need to represent those character sequences inside a regular expression | |
3010 | character class, just quote the square brackets with the backslash: "\[=" | |
3011 | and "=\]". The <-- HERE shows in the regular expression about where the | |
3012 | problem was discovered. See L<perlre>. | |
3013 | ||
3014 | =item Possible attempt to put comments in qw() list | |
3015 | ||
3016 | (W qw) qw() lists contain items separated by whitespace; as with literal | |
3017 | strings, comment characters are not ignored, but are instead treated as | |
3018 | literal data. (You may have used different delimiters than the | |
3019 | parentheses shown here; braces are also frequently used.) | |
3020 | ||
3021 | You probably wrote something like this: | |
3022 | ||
3023 | @list = qw( | |
3024 | a # a comment | |
3025 | b # another comment | |
3026 | ); | |
3027 | ||
3028 | when you should have written this: | |
3029 | ||
3030 | @list = qw( | |
3031 | a | |
3032 | b | |
3033 | ); | |
3034 | ||
3035 | If you really want comments, build your list the | |
3036 | old-fashioned way, with quotes and commas: | |
3037 | ||
3038 | @list = ( | |
3039 | 'a', # a comment | |
3040 | 'b', # another comment | |
3041 | ); | |
3042 | ||
3043 | =item Possible attempt to separate words with commas | |
3044 | ||
3045 | (W qw) qw() lists contain items separated by whitespace; therefore | |
3046 | commas aren't needed to separate the items. (You may have used | |
3047 | different delimiters than the parentheses shown here; braces are also | |
3048 | frequently used.) | |
3049 | ||
3050 | You probably wrote something like this: | |
3051 | ||
3052 | qw! a, b, c !; | |
3053 | ||
3054 | which puts literal commas into some of the list items. Write it without | |
3055 | commas if you don't want them to appear in your data: | |
3056 | ||
3057 | qw! a b c !; | |
3058 | ||
3059 | =item Possible memory corruption: %s overflowed 3rd argument | |
3060 | ||
3061 | (F) An ioctl() or fcntl() returned more than Perl was bargaining for. | |
3062 | Perl guesses a reasonable buffer size, but puts a sentinel byte at the | |
3063 | end of the buffer just in case. This sentinel byte got clobbered, and | |
3064 | Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>. | |
3065 | ||
3066 | =item Possible precedence problem on bitwise %c operator | |
3067 | ||
3068 | (W precedence) Your program uses a bitwise logical operator in conjunction | |
3069 | with a numeric comparison operator, like this : | |
3070 | ||
3071 | if ($x & $y == 0) { ... } | |
3072 | ||
3073 | This expression is actually equivalent to C<$x & ($y == 0)>, due to the | |
3074 | higher precedence of C<==>. This is probably not what you want. (If you | |
3075 | really meant to write this, disable the warning, or, better, put the | |
3076 | parentheses explicitly and write C<$x & ($y == 0)>). | |
3077 | ||
3078 | =item Possible unintended interpolation of %s in string | |
3079 | ||
3080 | (W ambiguous) You said something like `@foo' in a double-quoted string | |
3081 | but there was no array C<@foo> in scope at the time. If you wanted a | |
3082 | literal @foo, then write it as \@foo; otherwise find out what happened | |
3083 | to the array you apparently lost track of. | |
3084 | ||
3085 | =item Possible Y2K bug: %s | |
3086 | ||
3087 | (W y2k) You are concatenating the number 19 with another number, which | |
3088 | could be a potential Year 2000 problem. | |
3089 | ||
3090 | =item pragma "attrs" is deprecated, use "sub NAME : ATTRS" instead | |
3091 | ||
3092 | (D deprecated) You have written something like this: | |
3093 | ||
3094 | sub doit | |
3095 | { | |
3096 | use attrs qw(locked); | |
3097 | } | |
3098 | ||
3099 | You should use the new declaration syntax instead. | |
3100 | ||
3101 | sub doit : locked | |
3102 | { | |
3103 | ... | |
3104 | ||
3105 | The C<use attrs> pragma is now obsolete, and is only provided for | |
3106 | backward-compatibility. See L<perlsub/"Subroutine Attributes">. | |
3107 | ||
3108 | =item Precedence problem: open %s should be open(%s) | |
3109 | ||
3110 | (S precedence) The old irregular construct | |
3111 | ||
3112 | open FOO || die; | |
3113 | ||
3114 | is now misinterpreted as | |
3115 | ||
3116 | open(FOO || die); | |
3117 | ||
3118 | because of the strict regularization of Perl 5's grammar into unary and | |
3119 | list operators. (The old open was a little of both.) You must put | |
3120 | parentheses around the filehandle, or use the new "or" operator instead | |
3121 | of "||". | |
3122 | ||
3123 | =item Premature end of script headers | |
3124 | ||
3125 | See Server error. | |
3126 | ||
3127 | =item printf() on closed filehandle %s | |
3128 | ||
3129 | (W closed) The filehandle you're writing to got itself closed sometime | |
3130 | before now. Check your control flow. | |
3131 | ||
3132 | =item print() on closed filehandle %s | |
3133 | ||
3134 | (W closed) The filehandle you're printing on got itself closed sometime | |
3135 | before now. Check your control flow. | |
3136 | ||
3137 | =item Process terminated by SIG%s | |
3138 | ||
3139 | (W) This is a standard message issued by OS/2 applications, while *nix | |
3140 | applications die in silence. It is considered a feature of the OS/2 | |
3141 | port. One can easily disable this by appropriate sighandlers, see | |
3142 | L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT" | |
3143 | in L<perlos2>. | |
3144 | ||
3145 | =item Prototype mismatch: %s vs %s | |
3146 | ||
3147 | (S prototype) The subroutine being declared or defined had previously been | |
3148 | declared or defined with a different function prototype. | |
3149 | ||
3150 | =item Prototype not terminated | |
3151 | ||
3152 | (F) You've omitted the closing parenthesis in a function prototype | |
3153 | definition. | |
3154 | ||
3155 | =item Pseudo-hashes are deprecated | |
3156 | ||
3157 | (D deprecated) Pseudo-hashes were deprecated in Perl 5.8.0 and they | |
3158 | will be removed in Perl 5.10.0, see L<perl58delta> for more details. | |
3159 | You can continue to use the C<fields> pragma. | |
3160 | ||
3161 | =item Quantifier follows nothing in regex; marked by <-- HERE in m/%s/ | |
3162 | ||
3163 | (F) You started a regular expression with a quantifier. Backslash it if you | |
3164 | meant it literally. The <-- HERE shows in the regular expression about | |
3165 | where the problem was discovered. See L<perlre>. | |
3166 | ||
3167 | =item Quantifier in {,} bigger than %d in regex; marked by <-- HERE in m/%s/ | |
3168 | ||
3169 | (F) There is currently a limit to the size of the min and max values of the | |
3170 | {min,max} construct. The <-- HERE shows in the regular expression about where | |
3171 | the problem was discovered. See L<perlre>. | |
3172 | ||
3173 | =item Quantifier unexpected on zero-length expression; marked by <-- HERE in m/%s/ | |
3174 | ||
3175 | (W regexp) You applied a regular expression quantifier in a place where | |
3176 | it makes no sense, such as on a zero-width assertion. Try putting the | |
3177 | quantifier inside the assertion instead. For example, the way to match | |
3178 | "abc" provided that it is followed by three repetitions of "xyz" is | |
3179 | C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>. | |
3180 | ||
3181 | The <-- HERE shows in the regular expression about where the problem was | |
3182 | discovered. | |
3183 | ||
3184 | =item Range iterator outside integer range | |
3185 | ||
3186 | (F) One (or both) of the numeric arguments to the range operator ".." | |
3187 | are outside the range which can be represented by integers internally. | |
3188 | One possible workaround is to force Perl to use magical string increment | |
3189 | by prepending "0" to your numbers. | |
3190 | ||
3191 | =item readline() on closed filehandle %s | |
3192 | ||
3193 | (W closed) The filehandle you're reading from got itself closed sometime | |
3194 | before now. Check your control flow. | |
3195 | ||
3196 | =item read() on closed filehandle %s | |
3197 | ||
3198 | (W closed) You tried to read from a closed filehandle. | |
3199 | ||
3200 | =item read() on unopened filehandle %s | |
3201 | ||
3202 | (W unopened) You tried to read from a filehandle that was never opened. | |
3203 | ||
3204 | =item Reallocation too large: %lx | |
3205 | ||
3206 | (F) You can't allocate more than 64K on an MS-DOS machine. | |
3207 | ||
3208 | =item realloc() of freed memory ignored | |
3209 | ||
3210 | (S malloc) An internal routine called realloc() on something that had | |
3211 | already been freed. | |
3212 | ||
3213 | =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch | |
3214 | ||
3215 | (F debugging) You can't use the B<-D> option unless the code to produce | |
3216 | the desired output is compiled into Perl, which entails some overhead, | |
3217 | which is why it's currently left out of your copy. | |
3218 | ||
3219 | =item Recursive inheritance detected in package '%s' | |
3220 | ||
3221 | (F) More than 100 levels of inheritance were used. Probably indicates | |
3222 | an unintended loop in your inheritance hierarchy. | |
3223 | ||
3224 | =item Recursive inheritance detected while looking for method %s | |
3225 | ||
3226 | (F) More than 100 levels of inheritance were encountered while invoking | |
3227 | a method. Probably indicates an unintended loop in your inheritance | |
3228 | hierarchy. | |
3229 | ||
3230 | =item Reference found where even-sized list expected | |
3231 | ||
3232 | (W misc) You gave a single reference where Perl was expecting a list | |
3233 | with an even number of elements (for assignment to a hash). This usually | |
3234 | means that you used the anon hash constructor when you meant to use | |
3235 | parens. In any case, a hash requires key/value B<pairs>. | |
3236 | ||
3237 | %hash = { one => 1, two => 2, }; # WRONG | |
3238 | %hash = [ qw/ an anon array / ]; # WRONG | |
3239 | %hash = ( one => 1, two => 2, ); # right | |
3240 | %hash = qw( one 1 two 2 ); # also fine | |
3241 | ||
3242 | =item Reference is already weak | |
3243 | ||
3244 | (W misc) You have attempted to weaken a reference that is already weak. | |
3245 | Doing so has no effect. | |
3246 | ||
3247 | =item Reference miscount in sv_replace() | |
3248 | ||
3249 | (W internal) The internal sv_replace() function was handed a new SV with | |
3250 | a reference count of other than 1. | |
3251 | ||
3252 | =item Reference to nonexistent group in regex; marked by <-- HERE in m/%s/ | |
3253 | ||
3254 | (F) You used something like C<\7> in your regular expression, but there are | |
3255 | not at least seven sets of capturing parentheses in the expression. If you | |
3256 | wanted to have the character with value 7 inserted into the regular expression, | |
3257 | prepend a zero to make the number at least two digits: C<\07> | |
3258 | ||
3259 | The <-- HERE shows in the regular expression about where the problem was | |
3260 | discovered. | |
3261 | ||
3262 | =item regexp memory corruption | |
3263 | ||
3264 | (P) The regular expression engine got confused by what the regular | |
3265 | expression compiler gave it. | |
3266 | ||
3267 | =item Regexp out of space | |
3268 | ||
3269 | (P) A "can't happen" error, because safemalloc() should have caught it | |
3270 | earlier. | |
3271 | ||
3272 | =item Repeated format line will never terminate (~~ and @# incompatible) | |
3273 | ||
3274 | (F) Your format contains the ~~ repeat-until-blank sequence and a | |
3275 | numeric field that will never go blank so that the repetition never | |
3276 | terminates. You might use ^# instead. See L<perlform>. | |
3277 | ||
3278 | =item Reversed %s= operator | |
3279 | ||
3280 | (W syntax) You wrote your assignment operator backwards. The = must | |
3281 | always comes last, to avoid ambiguity with subsequent unary operators. | |
3282 | ||
3283 | =item Runaway format | |
3284 | ||
3285 | (F) Your format contained the ~~ repeat-until-blank sequence, but it | |
3286 | produced 200 lines at once, and the 200th line looked exactly like the | |
3287 | 199th line. Apparently you didn't arrange for the arguments to exhaust | |
3288 | themselves, either by using ^ instead of @ (for scalar variables), or by | |
3289 | shifting or popping (for array variables). See L<perlform>. | |
3290 | ||
3291 | =item Scalars leaked: %d | |
3292 | ||
3293 | (P) Something went wrong in Perl's internal bookkeeping of scalars: | |
3294 | not all scalar variables were deallocated by the time Perl exited. | |
3295 | What this usually indicates is a memory leak, which is of course bad, | |
3296 | especially if the Perl program is intended to be long-running. | |
3297 | ||
3298 | =item Scalar value @%s[%s] better written as $%s[%s] | |
3299 | ||
3300 | (W syntax) You've used an array slice (indicated by @) to select a | |
3301 | single element of an array. Generally it's better to ask for a scalar | |
3302 | value (indicated by $). The difference is that C<$foo[&bar]> always | |
3303 | behaves like a scalar, both when assigning to it and when evaluating its | |
3304 | argument, while C<@foo[&bar]> behaves like a list when you assign to it, | |
3305 | and provides a list context to its subscript, which can do weird things | |
3306 | if you're expecting only one subscript. | |
3307 | ||
3308 | On the other hand, if you were actually hoping to treat the array | |
3309 | element as a list, you need to look into how references work, because | |
3310 | Perl will not magically convert between scalars and lists for you. See | |
3311 | L<perlref>. | |
3312 | ||
3313 | =item Scalar value @%s{%s} better written as $%s{%s} | |
3314 | ||
3315 | (W syntax) You've used a hash slice (indicated by @) to select a single | |
3316 | element of a hash. Generally it's better to ask for a scalar value | |
3317 | (indicated by $). The difference is that C<$foo{&bar}> always behaves | |
3318 | like a scalar, both when assigning to it and when evaluating its | |
3319 | argument, while C<@foo{&bar}> behaves like a list when you assign to it, | |
3320 | and provides a list context to its subscript, which can do weird things | |
3321 | if you're expecting only one subscript. | |
3322 | ||
3323 | On the other hand, if you were actually hoping to treat the hash element | |
3324 | as a list, you need to look into how references work, because Perl will | |
3325 | not magically convert between scalars and lists for you. See | |
3326 | L<perlref>. | |
3327 | ||
3328 | =item Script is not setuid/setgid in suidperl | |
3329 | ||
3330 | (F) Oddly, the suidperl program was invoked on a script without a setuid | |
3331 | or setgid bit set. This doesn't make much sense. | |
3332 | ||
3333 | =item Search pattern not terminated | |
3334 | ||
3335 | (F) The lexer couldn't find the final delimiter of a // or m{} | |
3336 | construct. Remember that bracketing delimiters count nesting level. | |
3337 | Missing the leading C<$> from a variable C<$m> may cause this error. | |
3338 | ||
3339 | Note that since Perl 5.9.0 a // can also be the I<defined-or> | |
3340 | construct, not just the empty search pattern. Therefore code written | |
3341 | in Perl 5.9.0 or later that uses the // as the I<defined-or> can be | |
3342 | misparsed by pre-5.9.0 Perls as a non-terminated search pattern. | |
3343 | ||
3344 | =item Search pattern not terminated or ternary operator parsed as search pattern | |
3345 | ||
3346 | (F) The lexer couldn't find the final delimiter of a C<?PATTERN?> | |
3347 | construct. | |
3348 | ||
3349 | The question mark is also used as part of the ternary operator (as in | |
3350 | C<foo ? 0 : 1>) leading to some ambiguous constructions being wrongly | |
3351 | parsed. One way to disambiguate the parsing is to put parentheses around | |
3352 | the conditional expression, i.e. C<(foo) ? 0 : 1>. | |
3353 | ||
3354 | =item %sseek() on unopened filehandle | |
3355 | ||
3356 | (W unopened) You tried to use the seek() or sysseek() function on a | |
3357 | filehandle that was either never opened or has since been closed. | |
3358 | ||
3359 | =item select not implemented | |
3360 | ||
3361 | (F) This machine doesn't implement the select() system call. | |
3362 | ||
3363 | =item Self-ties of arrays and hashes are not supported | |
3364 | ||
3365 | (F) Self-ties are of arrays and hashes are not supported in | |
3366 | the current implementation. | |
3367 | ||
3368 | =item Semicolon seems to be missing | |
3369 | ||
3370 | (W semicolon) A nearby syntax error was probably caused by a missing | |
3371 | semicolon, or possibly some other missing operator, such as a comma. | |
3372 | ||
3373 | =item semi-panic: attempt to dup freed string | |
3374 | ||
3375 | (S internal) The internal newSVsv() routine was called to duplicate a | |
3376 | scalar that had previously been marked as free. | |
3377 | ||
3378 | =item sem%s not implemented | |
3379 | ||
3380 | (F) You don't have System V semaphore IPC on your system. | |
3381 | ||
3382 | =item send() on closed socket %s | |
3383 | ||
3384 | (W closed) The socket you're sending to got itself closed sometime | |
3385 | before now. Check your control flow. | |
3386 | ||
3387 | =item Sequence (? incomplete in regex; marked by <-- HERE in m/%s/ | |
3388 | ||
3389 | (F) A regular expression ended with an incomplete extension (?. The <-- HERE | |
3390 | shows in the regular expression about where the problem was discovered. See | |
3391 | L<perlre>. | |
3392 | ||
3393 | =item Sequence (?%s...) not implemented in regex; marked by <-- HERE in m/%s/ | |
3394 | ||
3395 | (F) A proposed regular expression extension has the character reserved but | |
3396 | has not yet been written. The <-- HERE shows in the regular expression about | |
3397 | where the problem was discovered. See L<perlre>. | |
3398 | ||
3399 | =item Sequence (?%s...) not recognized in regex; marked by <-- HERE in m/%s/ | |
3400 | ||
3401 | (F) You used a regular expression extension that doesn't make sense. The | |
3402 | <-- HERE shows in the regular expression about where the problem was | |
3403 | discovered. See L<perlre>. | |
3404 | ||
3405 | =item Sequence (?#... not terminated in regex; marked by <-- HERE in m/%s/ | |
3406 | ||
3407 | (F) A regular expression comment must be terminated by a closing | |
3408 | parenthesis. Embedded parentheses aren't allowed. The <-- HERE shows in | |
3409 | the regular expression about where the problem was discovered. See | |
3410 | L<perlre>. | |
3411 | ||
3412 | =item Sequence (?{...}) not terminated or not {}-balanced in regex; marked by <-- HERE in m/%s/ | |
3413 | ||
3414 | (F) If the contents of a (?{...}) clause contains braces, they must balance | |
3415 | for Perl to properly detect the end of the clause. The <-- HERE shows in | |
3416 | the regular expression about where the problem was discovered. See | |
3417 | L<perlre>. | |
3418 | ||
3419 | =item 500 Server error | |
3420 | ||
3421 | See Server error. | |
3422 | ||
3423 | =item Server error | |
3424 | ||
3425 | This is the error message generally seen in a browser window when trying | |
3426 | to run a CGI program (including SSI) over the web. The actual error text | |
3427 | varies widely from server to server. The most frequently-seen variants | |
3428 | are "500 Server error", "Method (something) not permitted", "Document | |
3429 | contains no data", "Premature end of script headers", and "Did not | |
3430 | produce a valid header". | |
3431 | ||
3432 | B<This is a CGI error, not a Perl error>. | |
3433 | ||
3434 | You need to make sure your script is executable, is accessible by the | |
3435 | user CGI is running the script under (which is probably not the user | |
3436 | account you tested it under), does not rely on any environment variables | |
3437 | (like PATH) from the user it isn't running under, and isn't in a | |
3438 | location where the CGI server can't find it, basically, more or less. | |
3439 | Please see the following for more information: | |
3440 | ||
3441 | http://www.perl.org/CGI_MetaFAQ.html | |
3442 | http://www.htmlhelp.org/faq/cgifaq.html | |
3443 | http://www.w3.org/Security/Faq/ | |
3444 | ||
3445 | You should also look at L<perlfaq9>. | |
3446 | ||
3447 | =item setegid() not implemented | |
3448 | ||
3449 | (F) You tried to assign to C<$)>, and your operating system doesn't | |
3450 | support the setegid() system call (or equivalent), or at least Configure | |
3451 | didn't think so. | |
3452 | ||
3453 | =item seteuid() not implemented | |
3454 | ||
3455 | (F) You tried to assign to C<< $> >>, and your operating system doesn't | |
3456 | support the seteuid() system call (or equivalent), or at least Configure | |
3457 | didn't think so. | |
3458 | ||
3459 | =item setpgrp can't take arguments | |
3460 | ||
3461 | (F) Your system has the setpgrp() from BSD 4.2, which takes no | |
3462 | arguments, unlike POSIX setpgid(), which takes a process ID and process | |
3463 | group ID. | |
3464 | ||
3465 | =item setrgid() not implemented | |
3466 | ||
3467 | (F) You tried to assign to C<$(>, and your operating system doesn't | |
3468 | support the setrgid() system call (or equivalent), or at least Configure | |
3469 | didn't think so. | |
3470 | ||
3471 | =item setruid() not implemented | |
3472 | ||
3473 | (F) You tried to assign to C<$<>, and your operating system doesn't | |
3474 | support the setruid() system call (or equivalent), or at least Configure | |
3475 | didn't think so. | |
3476 | ||
3477 | =item setsockopt() on closed socket %s | |
3478 | ||
3479 | (W closed) You tried to set a socket option on a closed socket. Did you | |
3480 | forget to check the return value of your socket() call? See | |
3481 | L<perlfunc/setsockopt>. | |
3482 | ||
3483 | =item Setuid/gid script is writable by world | |
3484 | ||
3485 | (F) The setuid emulator won't run a script that is writable by the | |
3486 | world, because the world might have written on it already. | |
3487 | ||
3488 | =item Setuid script not plain file | |
3489 | ||
3490 | (F) The setuid emulator won't run a script that isn't read from a file, | |
3491 | but from a socket, a pipe or another device. | |
3492 | ||
3493 | =item shm%s not implemented | |
3494 | ||
3495 | (F) You don't have System V shared memory IPC on your system. | |
3496 | ||
3497 | =item <> should be quotes | |
3498 | ||
3499 | (F) You wrote C<< require <file> >> when you should have written | |
3500 | C<require 'file'>. | |
3501 | ||
3502 | =item /%s/ should probably be written as "%s" | |
3503 | ||
3504 | (W syntax) You have used a pattern where Perl expected to find a string, | |
3505 | as in the first argument to C<join>. Perl will treat the true or false | |
3506 | result of matching the pattern against $_ as the string, which is | |
3507 | probably not what you had in mind. | |
3508 | ||
3509 | =item shutdown() on closed socket %s | |
3510 | ||
3511 | (W closed) You tried to do a shutdown on a closed socket. Seems a bit | |
3512 | superfluous. | |
3513 | ||
3514 | =item SIG%s handler "%s" not defined | |
3515 | ||
3516 | (W signal) The signal handler named in %SIG doesn't, in fact, exist. | |
3517 | Perhaps you put it into the wrong package? | |
3518 | ||
3519 | =item sort is now a reserved word | |
3520 | ||
3521 | (F) An ancient error message that almost nobody ever runs into anymore. | |
3522 | But before sort was a keyword, people sometimes used it as a filehandle. | |
3523 | ||
3524 | =item Sort subroutine didn't return a numeric value | |
3525 | ||
3526 | (F) A sort comparison routine must return a number. You probably blew | |
3527 | it by not using C<< <=> >> or C<cmp>, or by not using them correctly. | |
3528 | See L<perlfunc/sort>. | |
3529 | ||
3530 | =item Sort subroutine didn't return single value | |
3531 | ||
3532 | (F) A sort comparison subroutine may not return a list value with more | |
3533 | or less than one element. See L<perlfunc/sort>. | |
3534 | ||
3535 | =item splice() offset past end of array | |
3536 | ||
3537 | (W misc) You attempted to specify an offset that was past the end of | |
3538 | the array passed to splice(). Splicing will instead commence at the end | |
3539 | of the array, rather than past it. If this isn't what you want, try | |
3540 | explicitly pre-extending the array by assigning $#array = $offset. See | |
3541 | L<perlfunc/splice>. | |
3542 | ||
3543 | =item Split loop | |
3544 | ||
3545 | (P) The split was looping infinitely. (Obviously, a split shouldn't | |
3546 | iterate more times than there are characters of input, which is what | |
3547 | happened.) See L<perlfunc/split>. | |
3548 | ||
3549 | =item Statement unlikely to be reached | |
3550 | ||
3551 | (W exec) You did an exec() with some statement after it other than a | |
3552 | die(). This is almost always an error, because exec() never returns | |
3553 | unless there was a failure. You probably wanted to use system() | |
3554 | instead, which does return. To suppress this warning, put the exec() in | |
3555 | a block by itself. | |
3556 | ||
3557 | =item stat() on unopened filehandle %s | |
3558 | ||
3559 | (W unopened) You tried to use the stat() function on a filehandle that | |
3560 | was either never opened or has since been closed. | |
3561 | ||
3562 | =item Stub found while resolving method "%s" overloading "%s" | |
3563 | ||
3564 | (P) Overloading resolution over @ISA tree may be broken by importation | |
3565 | stubs. Stubs should never be implicitly created, but explicit calls to | |
3566 | C<can> may break this. | |
3567 | ||
3568 | =item Subroutine %s redefined | |
3569 | ||
3570 | (W redefine) You redefined a subroutine. To suppress this warning, say | |
3571 | ||
3572 | { | |
3573 | no warnings 'redefine'; | |
3574 | eval "sub name { ... }"; | |
3575 | } | |
3576 | ||
3577 | =item Substitution loop | |
3578 | ||
3579 | (P) The substitution was looping infinitely. (Obviously, a substitution | |
3580 | shouldn't iterate more times than there are characters of input, which | |
3581 | is what happened.) See the discussion of substitution in | |
3582 | L<perlop/"Quote and Quote-like Operators">. | |
3583 | ||
3584 | =item Substitution pattern not terminated | |
3585 | ||
3586 | (F) The lexer couldn't find the interior delimiter of an s/// or s{}{} | |
3587 | construct. Remember that bracketing delimiters count nesting level. | |
3588 | Missing the leading C<$> from variable C<$s> may cause this error. | |
3589 | ||
3590 | =item Substitution replacement not terminated | |
3591 | ||
3592 | (F) The lexer couldn't find the final delimiter of an s/// or s{}{} | |
3593 | construct. Remember that bracketing delimiters count nesting level. | |
3594 | Missing the leading C<$> from variable C<$s> may cause this error. | |
3595 | ||
3596 | =item substr outside of string | |
3597 | ||
3598 | (W substr),(F) You tried to reference a substr() that pointed outside of | |
3599 | a string. That is, the absolute value of the offset was larger than the | |
3600 | length of the string. See L<perlfunc/substr>. This warning is fatal if | |
3601 | substr is used in an lvalue context (as the left hand side of an | |
3602 | assignment or as a subroutine argument for example). | |
3603 | ||
3604 | =item suidperl is no longer needed since %s | |
3605 | ||
3606 | (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but | |
3607 | a version of the setuid emulator somehow got run anyway. | |
3608 | ||
3609 | =item Switch (?(condition)... contains too many branches in regex; marked by <-- HERE in m/%s/ | |
3610 | ||
3611 | (F) A (?(condition)if-clause|else-clause) construct can have at most two | |
3612 | branches (the if-clause and the else-clause). If you want one or both to | |
3613 | contain alternation, such as using C<this|that|other>, enclose it in | |
3614 | clustering parentheses: | |
3615 | ||
3616 | (?(condition)(?:this|that|other)|else-clause) | |
3617 | ||
3618 | The <-- HERE shows in the regular expression about where the problem was | |
3619 | discovered. See L<perlre>. | |
3620 | ||
3621 | =item Switch condition not recognized in regex; marked by <-- HERE in m/%s/ | |
3622 | ||
3623 | (F) If the argument to the (?(...)if-clause|else-clause) construct is a | |
3624 | number, it can be only a number. The <-- HERE shows in the regular expression | |
3625 | about where the problem was discovered. See L<perlre>. | |
3626 | ||
3627 | =item switching effective %s is not implemented | |
3628 | ||
3629 | (F) While under the C<use filetest> pragma, we cannot switch the real | |
3630 | and effective uids or gids. | |
3631 | ||
3632 | =item %s syntax | |
3633 | ||
3634 | (F) The final summary message when a C<perl -c> succeeds. | |
3635 | ||
3636 | =item syntax error | |
3637 | ||
3638 | (F) Probably means you had a syntax error. Common reasons include: | |
3639 | ||
3640 | A keyword is misspelled. | |
3641 | A semicolon is missing. | |
3642 | A comma is missing. | |
3643 | An opening or closing parenthesis is missing. | |
3644 | An opening or closing brace is missing. | |
3645 | A closing quote is missing. | |
3646 | ||
3647 | Often there will be another error message associated with the syntax | |
3648 | error giving more information. (Sometimes it helps to turn on B<-w>.) | |
3649 | The error message itself often tells you where it was in the line when | |
3650 | it decided to give up. Sometimes the actual error is several tokens | |
3651 | before this, because Perl is good at understanding random input. | |
3652 | Occasionally the line number may be misleading, and once in a blue moon | |
3653 | the only way to figure out what's triggering the error is to call | |
3654 | C<perl -c> repeatedly, chopping away half the program each time to see | |
3655 | if the error went away. Sort of the cybernetic version of S<20 | |
3656 | questions>. | |
3657 | ||
3658 | =item syntax error at line %d: `%s' unexpected | |
3659 | ||
3660 | (A) You've accidentally run your script through the Bourne shell instead | |
3661 | of Perl. Check the #! line, or manually feed your script into Perl | |
3662 | yourself. | |
3663 | ||
3664 | =item syntax error in file %s at line %d, next 2 tokens "%s" | |
3665 | ||
3666 | (F) This error is likely to occur if you run a perl5 script through | |
3667 | a perl4 interpreter, especially if the next 2 tokens are "use strict" | |
3668 | or "my $var" or "our $var". | |
3669 | ||
3670 | =item sysread() on closed filehandle %s | |
3671 | ||
3672 | (W closed) You tried to read from a closed filehandle. | |
3673 | ||
3674 | =item sysread() on unopened filehandle %s | |
3675 | ||
3676 | (W unopened) You tried to read from a filehandle that was never opened. | |
3677 | ||
3678 | =item System V %s is not implemented on this machine | |
3679 | ||
3680 | (F) You tried to do something with a function beginning with "sem", | |
3681 | "shm", or "msg" but that System V IPC is not implemented in your | |
3682 | machine. In some machines the functionality can exist but be | |
3683 | unconfigured. Consult your system support. | |
3684 | ||
3685 | =item syswrite() on closed filehandle %s | |
3686 | ||
3687 | (W closed) The filehandle you're writing to got itself closed sometime | |
3688 | before now. Check your control flow. | |
3689 | ||
3690 | =item C<-T> and C<-B> not implemented on filehandles | |
3691 | ||
3692 | (F) Perl can't peek at the stdio buffer of filehandles when it doesn't | |
3693 | know about your kind of stdio. You'll have to use a filename instead. | |
3694 | ||
3695 | =item Target of goto is too deeply nested | |
3696 | ||
3697 | (F) You tried to use C<goto> to reach a label that was too deeply nested | |
3698 | for Perl to reach. Perl is doing you a favor by refusing. | |
3699 | ||
3700 | =item tell() on unopened filehandle | |
3701 | ||
3702 | (W unopened) You tried to use the tell() function on a filehandle that | |
3703 | was either never opened or has since been closed. | |
3704 | ||
3705 | =item That use of $[ is unsupported | |
3706 | ||
3707 | (F) Assignment to C<$[> is now strictly circumscribed, and interpreted | |
3708 | as a compiler directive. You may say only one of | |
3709 | ||
3710 | $[ = 0; | |
3711 | $[ = 1; | |
3712 | ... | |
3713 | local $[ = 0; | |
3714 | local $[ = 1; | |
3715 | ... | |
3716 | ||
3717 | This is to prevent the problem of one module changing the array base out | |
3718 | from under another module inadvertently. See L<perlvar/$[>. | |
3719 | ||
3720 | =item The crypt() function is unimplemented due to excessive paranoia | |
3721 | ||
3722 | (F) Configure couldn't find the crypt() function on your machine, | |
3723 | probably because your vendor didn't supply it, probably because they | |
3724 | think the U.S. Government thinks it's a secret, or at least that they | |
3725 | will continue to pretend that it is. And if you quote me on that, I | |
3726 | will deny it. | |
3727 | ||
3728 | =item The %s function is unimplemented | |
3729 | ||
3730 | The function indicated isn't implemented on this architecture, according | |
3731 | to the probings of Configure. | |
3732 | ||
3733 | =item The stat preceding %s wasn't an lstat | |
3734 | ||
3735 | (F) It makes no sense to test the current stat buffer for symbolic | |
3736 | linkhood if the last stat that wrote to the stat buffer already went | |
3737 | past the symlink to get to the real file. Use an actual filename | |
3738 | instead. | |
3739 | ||
3740 | =item The 'unique' attribute may only be applied to 'our' variables | |
3741 | ||
3742 | (F) Currently this attribute is not supported on C<my> or C<sub> | |
3743 | declarations. See L<perlfunc/our>. | |
3744 | ||
3745 | =item This Perl can't reset CRTL environ elements (%s) | |
3746 | ||
3747 | =item This Perl can't set CRTL environ elements (%s=%s) | |
3748 | ||
3749 | (W internal) Warnings peculiar to VMS. You tried to change or delete an | |
3750 | element of the CRTL's internal environ array, but your copy of Perl | |
3751 | wasn't built with a CRTL that contained the setenv() function. You'll | |
3752 | need to rebuild Perl with a CRTL that does, or redefine | |
3753 | F<PERL_ENV_TABLES> (see L<perlvms>) so that the environ array isn't the | |
3754 | target of the change to | |
3755 | %ENV which produced the warning. | |
3756 | ||
3757 | =item thread failed to start: %s | |
3758 | ||
3759 | (W threads)(S) The entry point function of threads->create() failed for some reason. | |
3760 | ||
3761 | =item 5.005 threads are deprecated | |
3762 | ||
3763 | (D deprecated) The 5.005-style threads (activated by C<use Thread;>) | |
3764 | are deprecated and one should use the new ithreads instead, | |
3765 | see L<perl58delta> for more details. | |
3766 | ||
3767 | =item times not implemented | |
3768 | ||
3769 | (F) Your version of the C library apparently doesn't do times(). I | |
3770 | suspect you're not running on Unix. | |
3771 | ||
3772 | =item "-T" is on the #! line, it must also be used on the command line | |
3773 | ||
3774 | (X) The #! line (or local equivalent) in a Perl script contains the | |
3775 | B<-T> option, but Perl was not invoked with B<-T> in its command line. | |
3776 | This is an error because, by the time Perl discovers a B<-T> in a | |
3777 | script, it's too late to properly taint everything from the environment. | |
3778 | So Perl gives up. | |
3779 | ||
3780 | If the Perl script is being executed as a command using the #! | |
3781 | mechanism (or its local equivalent), this error can usually be fixed by | |
3782 | editing the #! line so that the B<-T> option is a part of Perl's first | |
3783 | argument: e.g. change C<perl -n -T> to C<perl -T -n>. | |
3784 | ||
3785 | If the Perl script is being executed as C<perl scriptname>, then the | |
3786 | B<-T> option must appear on the command line: C<perl -T scriptname>. | |
3787 | ||
3788 | =item To%s: illegal mapping '%s' | |
3789 | ||
3790 | (F) You tried to define a customized To-mapping for lc(), lcfirst, | |
3791 | uc(), or ucfirst() (or their string-inlined versions), but you | |
3792 | specified an illegal mapping. | |
3793 | See L<perlunicode/"User-Defined Character Properties">. | |
3794 | ||
3795 | =item Too deeply nested ()-groups | |
3796 | ||
3797 | (F) Your template contains ()-groups with a ridiculously deep nesting level. | |
3798 | ||
3799 | =item Too few args to syscall | |
3800 | ||
3801 | (F) There has to be at least one argument to syscall() to specify the | |
3802 | system call to call, silly dilly. | |
3803 | ||
3804 | =item Too late for "-%s" option | |
3805 | ||
3806 | (X) The #! line (or local equivalent) in a Perl script contains the | |
3807 | B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options | |
3808 | are not intended for use inside scripts. Use the C<use> pragma instead. | |
3809 | ||
3810 | =item Too late to run %s block | |
3811 | ||
3812 | (W void) A CHECK or INIT block is being defined during run time proper, | |
3813 | when the opportunity to run them has already passed. Perhaps you are | |
3814 | loading a file with C<require> or C<do> when you should be using C<use> | |
3815 | instead. Or perhaps you should put the C<require> or C<do> inside a | |
3816 | BEGIN block. | |
3817 | ||
3818 | =item Too many args to syscall | |
3819 | ||
3820 | (F) Perl supports a maximum of only 14 args to syscall(). | |
3821 | ||
3822 | =item Too many arguments for %s | |
3823 | ||
3824 | (F) The function requires fewer arguments than you specified. | |
3825 | ||
3826 | =item Too many )'s | |
3827 | ||
3828 | (A) You've accidentally run your script through B<csh> instead of Perl. | |
3829 | Check the #! line, or manually feed your script into Perl yourself. | |
3830 | ||
3831 | =item Too many ('s | |
3832 | ||
3833 | (A) You've accidentally run your script through B<csh> instead of Perl. | |
3834 | Check the #! line, or manually feed your script into Perl yourself. | |
3835 | ||
3836 | =item Trailing \ in regex m/%s/ | |
3837 | ||
3838 | (F) The regular expression ends with an unbackslashed backslash. | |
3839 | Backslash it. See L<perlre>. | |
3840 | ||
3841 | =item Transliteration pattern not terminated | |
3842 | ||
3843 | (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] | |
3844 | or y/// or y[][] construct. Missing the leading C<$> from variables | |
3845 | C<$tr> or C<$y> may cause this error. | |
3846 | ||
3847 | =item Transliteration replacement not terminated | |
3848 | ||
3849 | (F) The lexer couldn't find the final delimiter of a tr///, tr[][], | |
3850 | y/// or y[][] construct. | |
3851 | ||
3852 | =item '%s' trapped by operation mask | |
3853 | ||
3854 | (F) You tried to use an operator from a Safe compartment in which it's | |
3855 | disallowed. See L<Safe>. | |
3856 | ||
3857 | =item truncate not implemented | |
3858 | ||
3859 | (F) Your machine doesn't implement a file truncation mechanism that | |
3860 | Configure knows about. | |
3861 | ||
3862 | =item Type of arg %d to %s must be %s (not %s) | |
3863 | ||
3864 | (F) This function requires the argument in that position to be of a | |
3865 | certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be | |
3866 | %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the | |
3867 | {EXPR} forms as an explicit dereference. See L<perlref>. | |
3868 | ||
3869 | =item umask not implemented | |
3870 | ||
3871 | (F) Your machine doesn't implement the umask function and you tried to | |
3872 | use it to restrict permissions for yourself (EXPR & 0700). | |
3873 | ||
3874 | =item Unable to create sub named "%s" | |
3875 | ||
3876 | (F) You attempted to create or access a subroutine with an illegal name. | |
3877 | ||
3878 | =item Unbalanced context: %d more PUSHes than POPs | |
3879 | ||
3880 | (W internal) The exit code detected an internal inconsistency in how | |
3881 | many execution contexts were entered and left. | |
3882 | ||
3883 | =item Unbalanced saves: %d more saves than restores | |
3884 | ||
3885 | (W internal) The exit code detected an internal inconsistency in how | |
3886 | many values were temporarily localized. | |
3887 | ||
3888 | =item Unbalanced scopes: %d more ENTERs than LEAVEs | |
3889 | ||
3890 | (W internal) The exit code detected an internal inconsistency in how | |
3891 | many blocks were entered and left. | |
3892 | ||
3893 | =item Unbalanced tmps: %d more allocs than frees | |
3894 | ||
3895 | (W internal) The exit code detected an internal inconsistency in how | |
3896 | many mortal scalars were allocated and freed. | |
3897 | ||
3898 | =item Undefined format "%s" called | |
3899 | ||
3900 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
3901 | another package? See L<perlform>. | |
3902 | ||
3903 | =item Undefined sort subroutine "%s" called | |
3904 | ||
3905 | (F) The sort comparison routine specified doesn't seem to exist. | |
3906 | Perhaps it's in a different package? See L<perlfunc/sort>. | |
3907 | ||
3908 | =item Undefined subroutine &%s called | |
3909 | ||
3910 | (F) The subroutine indicated hasn't been defined, or if it was, it has | |
3911 | since been undefined. | |
3912 | ||
3913 | =item Undefined subroutine called | |
3914 | ||
3915 | (F) The anonymous subroutine you're trying to call hasn't been defined, | |
3916 | or if it was, it has since been undefined. | |
3917 | ||
3918 | =item Undefined subroutine in sort | |
3919 | ||
3920 | (F) The sort comparison routine specified is declared but doesn't seem | |
3921 | to have been defined yet. See L<perlfunc/sort>. | |
3922 | ||
3923 | =item Undefined top format "%s" called | |
3924 | ||
3925 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
3926 | another package? See L<perlform>. | |
3927 | ||
3928 | =item Undefined value assigned to typeglob | |
3929 | ||
3930 | (W misc) An undefined value was assigned to a typeglob, a la | |
3931 | C<*foo = undef>. This does nothing. It's possible that you really mean | |
3932 | C<undef *foo>. | |
3933 | ||
3934 | =item %s: Undefined variable | |
3935 | ||
3936 | (A) You've accidentally run your script through B<csh> instead of Perl. | |
3937 | Check the #! line, or manually feed your script into Perl yourself. | |
3938 | ||
3939 | =item unexec of %s into %s failed! | |
3940 | ||
3941 | (F) The unexec() routine failed for some reason. See your local FSF | |
3942 | representative, who probably put it there in the first place. | |
3943 | ||
3944 | =item Unicode character %s is illegal | |
3945 | ||
3946 | (W utf8) Certain Unicode characters have been designated off-limits by | |
3947 | the Unicode standard and should not be generated. If you really know | |
3948 | what you are doing you can turn off this warning by C<no warnings 'utf8';>. | |
3949 | ||
3950 | =item Unknown BYTEORDER | |
3951 | ||
3952 | (F) There are no byte-swapping functions for a machine with this byte | |
3953 | order. | |
3954 | ||
3955 | =item Unknown open() mode '%s' | |
3956 | ||
3957 | (F) The second argument of 3-argument open() is not among the list | |
3958 | of valid modes: C<< < >>, C<< > >>, C<<< >> >>>, C<< +< >>, | |
3959 | C<< +> >>, C<<< +>> >>>, C<-|>, C<|->, C<< <& >>, C<< >& >>. | |
3960 | ||
3961 | =item Unknown PerlIO layer "%s" | |
3962 | ||
3963 | (W layer) An attempt was made to push an unknown layer onto the Perl I/O | |
3964 | system. (Layers take care of transforming data between external and | |
3965 | internal representations.) Note that some layers, such as C<mmap>, | |
3966 | are not supported in all environments. If your program didn't | |
3967 | explicitly request the failing operation, it may be the result of the | |
3968 | value of the environment variable PERLIO. | |
3969 | ||
3970 | =item Unknown process %x sent message to prime_env_iter: %s | |
3971 | ||
3972 | (P) An error peculiar to VMS. Perl was reading values for %ENV before | |
3973 | iterating over it, and someone else stuck a message in the stream of | |
3974 | data Perl expected. Someone's very confused, or perhaps trying to | |
3975 | subvert Perl's population of %ENV for nefarious purposes. | |
3976 | ||
3977 | =item Unknown "re" subpragma '%s' (known ones are: %s) | |
3978 | ||
3979 | You tried to use an unknown subpragma of the "re" pragma. | |
3980 | ||
3981 | =item Unknown switch condition (?(%.2s in regex; marked by <-- HERE in m/%s/ | |
3982 | ||
3983 | (F) The condition part of a (?(condition)if-clause|else-clause) construct | |
3984 | is not known. The condition may be lookahead or lookbehind (the condition | |
3985 | is true if the lookahead or lookbehind is true), a (?{...}) construct (the | |
3986 | condition is true if the code evaluates to a true value), or a number (the | |
3987 | condition is true if the set of capturing parentheses named by the number | |
3988 | matched). | |
3989 | ||
3990 | The <-- HERE shows in the regular expression about where the problem was | |
3991 | discovered. See L<perlre>. | |
3992 | ||
3993 | =item Unknown Unicode option letter '%c' | |
3994 | ||
3995 | You specified an unknown Unicode option. See L<perlrun> documentation | |
3996 | of the C<-C> switch for the list of known options. | |
3997 | ||
3998 | =item Unknown Unicode option value %x | |
3999 | ||
4000 | You specified an unknown Unicode option. See L<perlrun> documentation | |
4001 | of the C<-C> switch for the list of known options. | |
4002 | ||
4003 | =item Unknown warnings category '%s' | |
4004 | ||
4005 | (F) An error issued by the C<warnings> pragma. You specified a warnings | |
4006 | category that is unknown to perl at this point. | |
4007 | ||
4008 | Note that if you want to enable a warnings category registered by a module | |
4009 | (e.g. C<use warnings 'File::Find'>), you must have imported this module | |
4010 | first. | |
4011 | ||
4012 | =item unmatched [ in regex; marked by <-- HERE in m/%s/ | |
4013 | ||
4014 | (F) The brackets around a character class must match. If you wish to | |
4015 | include a closing bracket in a character class, backslash it or put it | |
4016 | first. The <-- HERE shows in the regular expression about where the problem | |
4017 | was discovered. See L<perlre>. | |
4018 | ||
4019 | =item unmatched ( in regex; marked by <-- HERE in m/%s/ | |
4020 | ||
4021 | (F) Unbackslashed parentheses must always be balanced in regular | |
4022 | expressions. If you're a vi user, the % key is valuable for finding the | |
4023 | matching parenthesis. The <-- HERE shows in the regular expression about | |
4024 | where the problem was discovered. See L<perlre>. | |
4025 | ||
4026 | =item Unmatched right %s bracket | |
4027 | ||
4028 | (F) The lexer counted more closing curly or square brackets than opening | |
4029 | ones, so you're probably missing a matching opening bracket. As a | |
4030 | general rule, you'll find the missing one (so to speak) near the place | |
4031 | you were last editing. | |
4032 | ||
4033 | =item Unquoted string "%s" may clash with future reserved word | |
4034 | ||
4035 | (W reserved) You used a bareword that might someday be claimed as a | |
4036 | reserved word. It's best to put such a word in quotes, or capitalize it | |
4037 | somehow, or insert an underbar into it. You might also declare it as a | |
4038 | subroutine. | |
4039 | ||
4040 | =item Unrecognized character %s | |
4041 | ||
4042 | (F) The Perl parser has no idea what to do with the specified character | |
4043 | in your Perl script (or eval). Perhaps you tried to run a compressed | |
4044 | script, a binary program, or a directory as a Perl program. | |
4045 | ||
4046 | =item /%s/: Unrecognized escape \\%c in character class passed through | |
4047 | ||
4048 | (W regexp) You used a backslash-character combination which is not | |
4049 | recognized by Perl inside character classes. The character was | |
4050 | understood literally. | |
4051 | ||
4052 | =item Unrecognized escape \\%c passed through | |
4053 | ||
4054 | (W misc) You used a backslash-character combination which is not | |
4055 | recognized by Perl. | |
4056 | ||
4057 | =item Unrecognized escape \\%c passed through in regex; marked by <-- HERE in m/%s/ | |
4058 | ||
4059 | (W regexp) You used a backslash-character combination which is not | |
4060 | recognized by Perl. This combination appears in an interpolated variable or | |
4061 | a C<'>-delimited regular expression. The character was understood | |
4062 | literally. The <-- HERE shows in the regular expression about where the | |
4063 | escape was discovered. | |
4064 | ||
4065 | =item Unrecognized signal name "%s" | |
4066 | ||
4067 | (F) You specified a signal name to the kill() function that was not | |
4068 | recognized. Say C<kill -l> in your shell to see the valid signal names | |
4069 | on your system. | |
4070 | ||
4071 | =item Unrecognized switch: -%s (-h will show valid options) | |
4072 | ||
4073 | (F) You specified an illegal option to Perl. Don't do that. (If you | |
4074 | think you didn't do that, check the #! line to see if it's supplying the | |
4075 | bad switch on your behalf.) | |
4076 | ||
4077 | =item Unsuccessful %s on filename containing newline | |
4078 | ||
4079 | (W newline) A file operation was attempted on a filename, and that | |
4080 | operation failed, PROBABLY because the filename contained a newline, | |
4081 | PROBABLY because you forgot to chomp() it off. See L<perlfunc/chomp>. | |
4082 | ||
4083 | =item Unsupported directory function "%s" called | |
4084 | ||
4085 | (F) Your machine doesn't support opendir() and readdir(). | |
4086 | ||
4087 | =item Unsupported function %s | |
4088 | ||
4089 | (F) This machine doesn't implement the indicated function, apparently. | |
4090 | At least, Configure doesn't think so. | |
4091 | ||
4092 | =item Unsupported function fork | |
4093 | ||
4094 | (F) Your version of executable does not support forking. | |
4095 | ||
4096 | Note that under some systems, like OS/2, there may be different flavors | |
4097 | of Perl executables, some of which may support fork, some not. Try | |
4098 | changing the name you call Perl by to C<perl_>, C<perl__>, and so on. | |
4099 | ||
4100 | =item Unsupported script encoding %s | |
4101 | ||
4102 | (F) Your program file begins with a Unicode Byte Order Mark (BOM) which | |
4103 | declares it to be in a Unicode encoding that Perl cannot read. | |
4104 | ||
4105 | =item Unsupported socket function "%s" called | |
4106 | ||
4107 | (F) Your machine doesn't support the Berkeley socket mechanism, or at | |
4108 | least that's what Configure thought. | |
4109 | ||
4110 | =item Unterminated attribute list | |
4111 | ||
4112 | (F) The lexer found something other than a simple identifier at the | |
4113 | start of an attribute, and it wasn't a semicolon or the start of a | |
4114 | block. Perhaps you terminated the parameter list of the previous | |
4115 | attribute too soon. See L<attributes>. | |
4116 | ||
4117 | =item Unterminated attribute parameter in attribute list | |
4118 | ||
4119 | (F) The lexer saw an opening (left) parenthesis character while parsing | |
4120 | an attribute list, but the matching closing (right) parenthesis | |
4121 | character was not found. You may need to add (or remove) a backslash | |
4122 | character to get your parentheses to balance. See L<attributes>. | |
4123 | ||
4124 | =item Unterminated compressed integer | |
4125 | ||
4126 | (F) An argument to unpack("w",...) was incompatible with the BER | |
4127 | compressed integer format and could not be converted to an integer. | |
4128 | See L<perlfunc/pack>. | |
4129 | ||
4130 | =item Unterminated <> operator | |
4131 | ||
4132 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
4133 | a term, so it's looking for the corresponding right angle bracket, and | |
4134 | not finding it. Chances are you left some needed parentheses out | |
4135 | earlier in the line, and you really meant a "less than". | |
4136 | ||
4137 | =item untie attempted while %d inner references still exist | |
4138 | ||
4139 | (W untie) A copy of the object returned from C<tie> (or C<tied>) was | |
4140 | still valid when C<untie> was called. | |
4141 | ||
4142 | =item Usage: POSIX::%s(%s) | |
4143 | ||
4144 | (F) You called a POSIX function with incorrect arguments. | |
4145 | See L<POSIX/FUNCTIONS> for more information. | |
4146 | ||
4147 | =item Usage: Win32::%s(%s) | |
4148 | ||
4149 | (F) You called a Win32 function with incorrect arguments. | |
4150 | See L<Win32> for more information. | |
4151 | ||
4152 | =item Useless (?-%s) - don't use /%s modifier in regex; marked by <-- HERE in m/%s/ | |
4153 | ||
4154 | (W regexp) You have used an internal modifier such as (?-o) that has no | |
4155 | meaning unless removed from the entire regexp: | |
4156 | ||
4157 | if ($string =~ /(?-o)$pattern/o) { ... } | |
4158 | ||
4159 | must be written as | |
4160 | ||
4161 | if ($string =~ /$pattern/) { ... } | |
4162 | ||
4163 | The <-- HERE shows in the regular expression about | |
4164 | where the problem was discovered. See L<perlre>. | |
4165 | ||
4166 | =item Useless (?%s) - use /%s modifier in regex; marked by <-- HERE in m/%s/ | |
4167 | ||
4168 | (W regexp) You have used an internal modifier such as (?o) that has no | |
4169 | meaning unless applied to the entire regexp: | |
4170 | ||
4171 | if ($string =~ /(?o)$pattern/) { ... } | |
4172 | ||
4173 | must be written as | |
4174 | ||
4175 | if ($string =~ /$pattern/o) { ... } | |
4176 | ||
4177 | The <-- HERE shows in the regular expression about | |
4178 | where the problem was discovered. See L<perlre>. | |
4179 | ||
4180 | =item Useless use of %s in void context | |
4181 | ||
4182 | (W void) You did something without a side effect in a context that does | |
4183 | nothing with the return value, such as a statement that doesn't return a | |
4184 | value from a block, or the left side of a scalar comma operator. Very | |
4185 | often this points not to stupidity on your part, but a failure of Perl | |
4186 | to parse your program the way you thought it would. For example, you'd | |
4187 | get this if you mixed up your C precedence with Python precedence and | |
4188 | said | |
4189 | ||
4190 | $one, $two = 1, 2; | |
4191 | ||
4192 | when you meant to say | |
4193 | ||
4194 | ($one, $two) = (1, 2); | |
4195 | ||
4196 | Another common error is to use ordinary parentheses to construct a list | |
4197 | reference when you should be using square or curly brackets, for | |
4198 | example, if you say | |
4199 | ||
4200 | $array = (1,2); | |
4201 | ||
4202 | when you should have said | |
4203 | ||
4204 | $array = [1,2]; | |
4205 | ||
4206 | The square brackets explicitly turn a list value into a scalar value, | |
4207 | while parentheses do not. So when a parenthesized list is evaluated in | |
4208 | a scalar context, the comma is treated like C's comma operator, which | |
4209 | throws away the left argument, which is not what you want. See | |
4210 | L<perlref> for more on this. | |
4211 | ||
4212 | This warning will not be issued for numerical constants equal to 0 or 1 | |
4213 | since they are often used in statements like | |
4214 | ||
4215 | 1 while sub_with_side_effects(); | |
4216 | ||
4217 | String constants that would normally evaluate to 0 or 1 are warned | |
4218 | about. | |
4219 | ||
4220 | =item Useless use of "re" pragma | |
4221 | ||
4222 | (W) You did C<use re;> without any arguments. That isn't very useful. | |
4223 | ||
4224 | =item Useless use of sort in scalar context | |
4225 | ||
4226 | (W void) You used sort in scalar context, as in : | |
4227 | ||
4228 | my $x = sort @y; | |
4229 | ||
4230 | This is not very useful, and perl currently optimizes this away. | |
4231 | ||
4232 | =item Useless use of %s with no values | |
4233 | ||
4234 | (W syntax) You used the push() or unshift() function with no arguments | |
4235 | apart from the array, like C<push(@x)> or C<unshift(@foo)>. That won't | |
4236 | usually have any effect on the array, so is completely useless. It's | |
4237 | possible in principle that push(@tied_array) could have some effect | |
4238 | if the array is tied to a class which implements a PUSH method. If so, | |
4239 | you can write it as C<push(@tied_array,())> to avoid this warning. | |
4240 | ||
4241 | =item "use" not allowed in expression | |
4242 | ||
4243 | (F) The "use" keyword is recognized and executed at compile time, and | |
4244 | returns no useful value. See L<perlmod>. | |
4245 | ||
4246 | =item Use of bare << to mean <<"" is deprecated | |
4247 | ||
4248 | (D deprecated) You are now encouraged to use the explicitly quoted form | |
4249 | if you wish to use an empty line as the terminator of the here-document. | |
4250 | ||
4251 | =item Use of chdir('') or chdir(undef) as chdir() deprecated | |
4252 | ||
4253 | (D deprecated) chdir() with no arguments is documented to change to | |
4254 | $ENV{HOME} or $ENV{LOGDIR}. chdir(undef) and chdir('') share this | |
4255 | behavior, but that has been deprecated. In future versions they | |
4256 | will simply fail. | |
4257 | ||
4258 | Be careful to check that what you pass to chdir() is defined and not | |
4259 | blank, else you might find yourself in your home directory. | |
4260 | ||
4261 | =item Use of /c modifier is meaningless in s/// | |
4262 | ||
4263 | (W regexp) You used the /c modifier in a substitution. The /c | |
4264 | modifier is not presently meaningful in substitutions. | |
4265 | ||
4266 | =item Use of /c modifier is meaningless without /g | |
4267 | ||
4268 | (W regexp) You used the /c modifier with a regex operand, but didn't | |
4269 | use the /g modifier. Currently, /c is meaningful only when /g is | |
4270 | used. (This may change in the future.) | |
4271 | ||
4272 | =item Use of freed value in iteration | |
4273 | ||
4274 | (F) Perhaps you modified the iterated array within the loop? | |
4275 | This error is typically caused by code like the following: | |
4276 | ||
4277 | @a = (3,4); | |
4278 | @a = () for (1,2,@a); | |
4279 | ||
4280 | You are not supposed to modify arrays while they are being iterated over. | |
4281 | For speed and efficiency reasons, Perl internally does not do full | |
4282 | reference-counting of iterated items, hence deleting such an item in the | |
4283 | middle of an iteration causes Perl to see a freed value. | |
4284 | ||
4285 | =item Use of *glob{FILEHANDLE} is deprecated | |
4286 | ||
4287 | (D deprecated) You are now encouraged to use the shorter *glob{IO} form | |
4288 | to access the filehandle slot within a typeglob. | |
4289 | ||
4290 | =item Use of /g modifier is meaningless in split | |
4291 | ||
4292 | (W regexp) You used the /g modifier on the pattern for a C<split> | |
4293 | operator. Since C<split> always tries to match the pattern | |
4294 | repeatedly, the C</g> has no effect. | |
4295 | ||
4296 | =item Use of implicit split to @_ is deprecated | |
4297 | ||
4298 | (D deprecated) It makes a lot of work for the compiler when you clobber | |
4299 | a subroutine's argument list, so it's better if you assign the results | |
4300 | of a split() explicitly to an array (or list). | |
4301 | ||
4302 | =item Use of inherited AUTOLOAD for non-method %s() is deprecated | |
4303 | ||
4304 | (D deprecated) As an (ahem) accidental feature, C<AUTOLOAD> subroutines | |
4305 | are looked up as methods (using the C<@ISA> hierarchy) even when the | |
4306 | subroutines to be autoloaded were called as plain functions (e.g. | |
4307 | C<Foo::bar()>), not as methods (e.g. C<< Foo->bar() >> or C<< | |
4308 | $obj->bar() >>). | |
4309 | ||
4310 | This bug will be rectified in future by using method lookup only for | |
4311 | methods' C<AUTOLOAD>s. However, there is a significant base of existing | |
4312 | code that may be using the old behavior. So, as an interim step, Perl | |
4313 | currently issues an optional warning when non-methods use inherited | |
4314 | C<AUTOLOAD>s. | |
4315 | ||
4316 | The simple rule is: Inheritance will not work when autoloading | |
4317 | non-methods. The simple fix for old code is: In any module that used | |
4318 | to depend on inheriting C<AUTOLOAD> for non-methods from a base class | |
4319 | named C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during | |
4320 | startup. | |
4321 | ||
4322 | In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> | |
4323 | you should remove AutoLoader from @ISA and change C<use AutoLoader;> to | |
4324 | C<use AutoLoader 'AUTOLOAD';>. | |
4325 | ||
4326 | =item Use of %s in printf format not supported | |
4327 | ||
4328 | (F) You attempted to use a feature of printf that is accessible from | |
4329 | only C. This usually means there's a better way to do it in Perl. | |
4330 | ||
4331 | =item Use of $* is deprecated | |
4332 | ||
4333 | (D deprecated) This variable magically turned on multi-line pattern | |
4334 | matching, both for you and for any luckless subroutine that you happen | |
4335 | to call. You should use the new C<//m> and C<//s> modifiers now to do | |
4336 | that without the dangerous action-at-a-distance effects of C<$*>. | |
4337 | ||
4338 | =item Use of $# is deprecated | |
4339 | ||
4340 | (D deprecated) This was an ill-advised attempt to emulate a poorly | |
4341 | defined B<awk> feature. Use an explicit printf() or sprintf() instead. | |
4342 | ||
4343 | =item Use of %s is deprecated | |
4344 | ||
4345 | (D deprecated) The construct indicated is no longer recommended for use, | |
4346 | generally because there's a better way to do it, and also because the | |
4347 | old way has bad side effects. | |
4348 | ||
4349 | =item Use of -l on filehandle %s | |
4350 | ||
4351 | (W io) A filehandle represents an opened file, and when you opened the file | |
4352 | it already went past any symlink you are presumably trying to look for. | |
4353 | The operation returned C<undef>. Use a filename instead. | |
4354 | ||
4355 | =item Use of "package" with no arguments is deprecated | |
4356 | ||
4357 | (D deprecated) You used the C<package> keyword without specifying a package | |
4358 | name. So no namespace is current at all. Using this can cause many | |
4359 | otherwise reasonable constructs to fail in baffling ways. C<use strict;> | |
4360 | instead. | |
4361 | ||
4362 | =item Use of reference "%s" as array index | |
4363 | ||
4364 | (W misc) You tried to use a reference as an array index; this probably | |
4365 | isn't what you mean, because references in numerical context tend | |
4366 | to be huge numbers, and so usually indicates programmer error. | |
4367 | ||
4368 | If you really do mean it, explicitly numify your reference, like so: | |
4369 | C<$array[0+$ref]>. This warning is not given for overloaded objects, | |
4370 | either, because you can overload the numification and stringification | |
4371 | operators and then you assumedly know what you are doing. | |
4372 | ||
4373 | =item Use of reserved word "%s" is deprecated | |
4374 | ||
4375 | (D deprecated) The indicated bareword is a reserved word. Future | |
4376 | versions of perl may use it as a keyword, so you're better off either | |
4377 | explicitly quoting the word in a manner appropriate for its context of | |
4378 | use, or using a different name altogether. The warning can be | |
4379 | suppressed for subroutine names by either adding a C<&> prefix, or using | |
4380 | a package qualifier, e.g. C<&our()>, or C<Foo::our()>. | |
4381 | ||
4382 | =item Use of tainted arguments in %s is deprecated | |
4383 | ||
4384 | (W taint, deprecated) You have supplied C<system()> or C<exec()> with multiple | |
4385 | arguments and at least one of them is tainted. This used to be allowed | |
4386 | but will become a fatal error in a future version of perl. Untaint your | |
4387 | arguments. See L<perlsec>. | |
4388 | ||
4389 | =item Use of uninitialized value%s | |
4390 | ||
4391 | (W uninitialized) An undefined value was used as if it were already | |
4392 | defined. It was interpreted as a "" or a 0, but maybe it was a mistake. | |
4393 | To suppress this warning assign a defined value to your variables. | |
4394 | ||
4395 | To help you figure out what was undefined, perl tells you what operation | |
4396 | you used the undefined value in. Note, however, that perl optimizes your | |
4397 | program and the operation displayed in the warning may not necessarily | |
4398 | appear literally in your program. For example, C<"that $foo"> is | |
4399 | usually optimized into C<"that " . $foo>, and the warning will refer to | |
4400 | the C<concatenation (.)> operator, even though there is no C<.> in your | |
4401 | program. | |
4402 | ||
4403 | =item Using a hash as a reference is deprecated | |
4404 | ||
4405 | (D deprecated) You tried to use a hash as a reference, as in | |
4406 | C<< %foo->{"bar"} >> or C<< %$ref->{"hello"} >>. Versions of perl <= 5.6.1 | |
4407 | used to allow this syntax, but shouldn't have. It is now deprecated, and will | |
4408 | be removed in a future version. | |
4409 | ||
4410 | =item Using an array as a reference is deprecated | |
4411 | ||
4412 | (D deprecated) You tried to use an array as a reference, as in | |
4413 | C<< @foo->[23] >> or C<< @$ref->[99] >>. Versions of perl <= 5.6.1 used to | |
4414 | allow this syntax, but shouldn't have. It is now deprecated, and will be | |
4415 | removed in a future version. | |
4416 | ||
4417 | =item UTF-16 surrogate %s | |
4418 | ||
4419 | (W utf8) You tried to generate half of an UTF-16 surrogate by | |
4420 | requesting a Unicode character between the code points 0xD800 and | |
4421 | 0xDFFF (inclusive). That range is reserved exclusively for the use of | |
4422 | UTF-16 encoding (by having two 16-bit UCS-2 characters); but Perl | |
4423 | encodes its characters in UTF-8, so what you got is a very illegal | |
4424 | character. If you really know what you are doing you can turn off | |
4425 | this warning by C<no warnings 'utf8';>. | |
4426 | ||
4427 | =item Value of %s can be "0"; test with defined() | |
4428 | ||
4429 | (W misc) In a conditional expression, you used <HANDLE>, <*> (glob), | |
4430 | C<each()>, or C<readdir()> as a boolean value. Each of these constructs | |
4431 | can return a value of "0"; that would make the conditional expression | |
4432 | false, which is probably not what you intended. When using these | |
4433 | constructs in conditional expressions, test their values with the | |
4434 | C<defined> operator. | |
4435 | ||
4436 | =item Value of CLI symbol "%s" too long | |
4437 | ||
4438 | (W misc) A warning peculiar to VMS. Perl tried to read the value of an | |
4439 | %ENV element from a CLI symbol table, and found a resultant string | |
4440 | longer than 1024 characters. The return value has been truncated to | |
4441 | 1024 characters. | |
4442 | ||
4443 | =item Variable "%s" is not imported%s | |
4444 | ||
4445 | (F) While "use strict" in effect, you referred to a global variable that | |
4446 | you apparently thought was imported from another module, because | |
4447 | something else of the same name (usually a subroutine) is exported by | |
4448 | that module. It usually means you put the wrong funny character on the | |
4449 | front of your variable. | |
4450 | ||
4451 | =item Variable length lookbehind not implemented in regex; marked by <-- HERE in m/%s/ | |
4452 | ||
4453 | (F) Lookbehind is allowed only for subexpressions whose length is fixed and | |
4454 | known at compile time. The <-- HERE shows in the regular expression about | |
4455 | where the problem was discovered. See L<perlre>. | |
4456 | ||
4457 | =item "%s" variable %s masks earlier declaration in same %s | |
4458 | ||
4459 | (W misc) A "my" or "our" variable has been redeclared in the current | |
4460 | scope or statement, effectively eliminating all access to the previous | |
4461 | instance. This is almost always a typographical error. Note that the | |
4462 | earlier variable will still exist until the end of the scope or until | |
4463 | all closure referents to it are destroyed. | |
4464 | ||
4465 | =item Variable "%s" may be unavailable | |
4466 | ||
4467 | (W closure) An inner (nested) I<anonymous> subroutine is inside a | |
4468 | I<named> subroutine, and outside that is another subroutine; and the | |
4469 | anonymous (innermost) subroutine is referencing a lexical variable | |
4470 | defined in the outermost subroutine. For example: | |
4471 | ||
4472 | sub outermost { my $a; sub middle { sub { $a } } } | |
4473 | ||
4474 | If the anonymous subroutine is called or referenced (directly or | |
4475 | indirectly) from the outermost subroutine, it will share the variable as | |
4476 | you would expect. But if the anonymous subroutine is called or | |
4477 | referenced when the outermost subroutine is not active, it will see the | |
4478 | value of the shared variable as it was before and during the *first* | |
4479 | call to the outermost subroutine, which is probably not what you want. | |
4480 | ||
4481 | In these circumstances, it is usually best to make the middle subroutine | |
4482 | anonymous, using the C<sub {}> syntax. Perl has specific support for | |
4483 | shared variables in nested anonymous subroutines; a named subroutine in | |
4484 | between interferes with this feature. | |
4485 | ||
4486 | =item Variable syntax | |
4487 | ||
4488 | (A) You've accidentally run your script through B<csh> instead | |
4489 | of Perl. Check the #! line, or manually feed your script into | |
4490 | Perl yourself. | |
4491 | ||
4492 | =item Variable "%s" will not stay shared | |
4493 | ||
4494 | (W closure) An inner (nested) I<named> subroutine is referencing a | |
4495 | lexical variable defined in an outer subroutine. | |
4496 | ||
4497 | When the inner subroutine is called, it will probably see the value of | |
4498 | the outer subroutine's variable as it was before and during the *first* | |
4499 | call to the outer subroutine; in this case, after the first call to the | |
4500 | outer subroutine is complete, the inner and outer subroutines will no | |
4501 | longer share a common value for the variable. In other words, the | |
4502 | variable will no longer be shared. | |
4503 | ||
4504 | Furthermore, if the outer subroutine is anonymous and references a | |
4505 | lexical variable outside itself, then the outer and inner subroutines | |
4506 | will I<never> share the given variable. | |
4507 | ||
4508 | This problem can usually be solved by making the inner subroutine | |
4509 | anonymous, using the C<sub {}> syntax. When inner anonymous subs that | |
4510 | reference variables in outer subroutines are called or referenced, they | |
4511 | are automatically rebound to the current values of such variables. | |
4512 | ||
4513 | =item Version number must be a constant number | |
4514 | ||
4515 | (P) The attempt to translate a C<use Module n.n LIST> statement into | |
4516 | its equivalent C<BEGIN> block found an internal inconsistency with | |
4517 | the version number. | |
4518 | ||
4519 | =item Warning: something's wrong | |
4520 | ||
4521 | (W) You passed warn() an empty string (the equivalent of C<warn "">) or | |
4522 | you called it with no args and C<$_> was empty. | |
4523 | ||
4524 | =item Warning: unable to close filehandle %s properly | |
4525 | ||
4526 | (S) The implicit close() done by an open() got an error indication on | |
4527 | the close(). This usually indicates your file system ran out of disk | |
4528 | space. | |
4529 | ||
4530 | =item Warning: Use of "%s" without parentheses is ambiguous | |
4531 | ||
4532 | (S ambiguous) You wrote a unary operator followed by something that | |
4533 | looks like a binary operator that could also have been interpreted as a | |
4534 | term or unary operator. For instance, if you know that the rand | |
4535 | function has a default argument of 1.0, and you write | |
4536 | ||
4537 | rand + 5; | |
4538 | ||
4539 | you may THINK you wrote the same thing as | |
4540 | ||
4541 | rand() + 5; | |
4542 | ||
4543 | but in actual fact, you got | |
4544 | ||
4545 | rand(+5); | |
4546 | ||
4547 | So put in parentheses to say what you really mean. | |
4548 | ||
4549 | =item Wide character in %s | |
4550 | ||
4551 | (W utf8) Perl met a wide character (>255) when it wasn't expecting | |
4552 | one. This warning is by default on for I/O (like print). The easiest | |
4553 | way to quiet this warning is simply to add the C<:utf8> layer to the | |
4554 | output, e.g. C<binmode STDOUT, ':utf8'>. Another way to turn off the | |
4555 | warning is to add C<no warnings 'utf8';> but that is often closer to | |
4556 | cheating. In general, you are supposed to explicitly mark the | |
4557 | filehandle with an encoding, see L<open> and L<perlfunc/binmode>. | |
4558 | ||
4559 | =item Within []-length '%c' not allowed | |
4560 | ||
4561 | (F) The count in the (un)pack template may be replaced by C<[TEMPLATE]> only if | |
4562 | C<TEMPLATE> always matches the same amount of packed bytes that can be | |
4563 | determined from the template alone. This is not possible if it contains an | |
4564 | of the codes @, /, U, u, w or a *-length. Redesign the template. | |
4565 | ||
4566 | =item write() on closed filehandle %s | |
4567 | ||
4568 | (W closed) The filehandle you're writing to got itself closed sometime | |
4569 | before now. Check your control flow. | |
4570 | ||
4571 | =item %s "\x%s" does not map to Unicode | |
4572 | ||
4573 | When reading in different encodings Perl tries to map everything | |
4574 | into Unicode characters. The bytes you read in are not legal in | |
4575 | this encoding, for example | |
4576 | ||
4577 | utf8 "\xE4" does not map to Unicode | |
4578 | ||
4579 | if you try to read in the a-diaereses Latin-1 as UTF-8. | |
4580 | ||
4581 | =item 'X' outside of string | |
4582 | ||
4583 | (F) You had a (un)pack template that specified a relative position before | |
4584 | the beginning of the string being (un)packed. See L<perlfunc/pack>. | |
4585 | ||
4586 | =item 'x' outside of string in unpack | |
4587 | ||
4588 | (F) You had a pack template that specified a relative position after | |
4589 | the end of the string being unpacked. See L<perlfunc/pack>. | |
4590 | ||
4591 | =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! | |
4592 | ||
4593 | (F) And you probably never will, because you probably don't have the | |
4594 | sources to your kernel, and your vendor probably doesn't give a rip | |
4595 | about what you want. Your best bet is to put a setuid C wrapper around | |
4596 | your script. | |
4597 | ||
4598 | =item You need to quote "%s" | |
4599 | ||
4600 | (W syntax) You assigned a bareword as a signal handler name. | |
4601 | Unfortunately, you already have a subroutine of that name declared, | |
4602 | which means that Perl 5 will try to call the subroutine when the | |
4603 | assignment is executed, which is probably not what you want. (If it IS | |
4604 | what you want, put an & in front.) | |
4605 | ||
4606 | =item Your random numbers are not that random | |
4607 | ||
4608 | (F) When trying to initialise the random seed for hashes, Perl could | |
4609 | not get any randomness out of your system. This usually indicates | |
4610 | Something Very Wrong. | |
4611 | ||
4612 | =back | |
4613 | ||
4614 | =cut |