Commit | Line | Data |
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a0d0e21e LW |
1 | =head1 NAME |
2 | ||
3 | perldiag - various Perl diagnostics | |
4 | ||
5 | =head1 DESCRIPTION | |
6 | ||
7 | These messages are classified as follows (listed in increasing order of | |
8 | desperation): | |
9 | ||
10 | (W) A warning (optional). | |
11 | (D) A deprecation (optional). | |
12 | (S) A severe warning (mandatory). | |
13 | (F) A fatal error (trappable). | |
14 | (P) An internal error you should never see (trappable). | |
15 | (X) A very fatal error (non-trappable). | |
cb1a09d0 | 16 | (A) An alien error message (not generated by Perl). |
a0d0e21e | 17 | |
748a9306 | 18 | Optional warnings are enabled by using the B<-w> switch. Warnings may |
8b1a09fc | 19 | be captured by setting C<$SIG{__WARN__}> to a reference to a routine that will be |
748a9306 LW |
20 | called on each warning instead of printing it. See L<perlvar>. |
21 | Trappable errors may be trapped using the eval operator. See | |
22 | L<perlfunc/eval>. | |
a0d0e21e LW |
23 | |
24 | Some of these messages are generic. Spots that vary are denoted with a %s, | |
2ba9eb46 | 25 | just as in a printf format. Note that some messages start with a %s! |
a0d0e21e LW |
26 | The symbols C<"%-?@> sort before the letters, while C<[> and C<\> sort after. |
27 | ||
28 | =over 4 | |
29 | ||
30 | =item "my" variable %s can't be in a package | |
31 | ||
32 | (F) Lexically scoped variables aren't in a package, so it doesn't make sense | |
33 | to try to declare one with a package qualifier on the front. Use local() | |
34 | if you want to localize a package variable. | |
35 | ||
2ba9eb46 | 36 | =item "my" variable %s masks earlier declaration in same scope |
37 | ||
38 | (S) A lexical variable has been redeclared in the same scope, effectively | |
39 | eliminating all access to the previous instance. This is almost always | |
8b1a09fc | 40 | a typographical error. Note that the earlier variable will still exist |
2ba9eb46 | 41 | until the end of the scope or until all closure referents to it are |
42 | destroyed. | |
43 | ||
a0d0e21e LW |
44 | =item "no" not allowed in expression |
45 | ||
46 | (F) The "no" keyword is recognized and executed at compile time, and returns | |
47 | no useful value. See L<perlmod>. | |
48 | ||
49 | =item "use" not allowed in expression | |
50 | ||
51 | (F) The "use" keyword is recognized and executed at compile time, and returns | |
52 | no useful value. See L<perlmod>. | |
53 | ||
54 | =item % may only be used in unpack | |
55 | ||
56 | (F) You can't pack a string by supplying a checksum, since the | |
57 | checksumming process loses information, and you can't go the other | |
58 | way. See L<perlfunc/unpack>. | |
59 | ||
60 | =item %s (...) interpreted as function | |
61 | ||
62 | (W) You've run afoul of the rule that says that any list operator followed | |
8b1a09fc | 63 | by parentheses turns into a function, with all the list operators arguments |
a0d0e21e LW |
64 | found inside the parens. See L<perlop/Terms and List Operators (Leftward)>. |
65 | ||
66 | =item %s argument is not a HASH element | |
67 | ||
68 | (F) The argument to delete() or exists() must be a hash element, such as | |
69 | ||
70 | $foo{$bar} | |
71 | $ref->[12]->{"susie"} | |
72 | ||
73 | =item %s did not return a true value | |
74 | ||
75 | (F) A required (or used) file must return a true value to indicate that | |
76 | it compiled correctly and ran its initialization code correctly. It's | |
77 | traditional to end such a file with a "1;", though any true value would | |
78 | do. See L<perlfunc/require>. | |
79 | ||
80 | =item %s found where operator expected | |
81 | ||
82 | (S) The Perl lexer knows whether to expect a term or an operator. If it | |
83 | sees what it knows to be a term when it was expecting to see an operator, | |
84 | it gives you this warning. Usually it indicates that an operator or | |
85 | delimiter was omitted, such as a semicolon. | |
86 | ||
87 | =item %s had compilation errors. | |
88 | ||
89 | (F) The final summary message when a C<perl -c> fails. | |
90 | ||
91 | =item %s has too many errors. | |
92 | ||
93 | (F) The parser has given up trying to parse the program after 10 errors. | |
94 | Further error messages would likely be uninformative. | |
95 | ||
96 | =item %s matches null string many times | |
97 | ||
98 | (W) The pattern you've specified would be an infinite loop if the | |
99 | regular expression engine didn't specifically check for that. See L<perlre>. | |
100 | ||
101 | =item %s never introduced | |
102 | ||
103 | (S) The symbol in question was declared but somehow went out of scope | |
104 | before it could possibly have been used. | |
105 | ||
106 | =item %s syntax OK | |
107 | ||
108 | (F) The final summary message when a C<perl -c> succeeds. | |
109 | ||
cb1a09d0 AD |
110 | =item %s: Command not found. |
111 | ||
112 | (A) You've accidentally run your script through B<csh> instead | |
8b1a09fc | 113 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 AD |
114 | into Perl yourself. |
115 | ||
116 | =item %s: Expression syntax. | |
117 | ||
118 | (A) You've accidentally run your script through B<csh> instead | |
8b1a09fc | 119 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 AD |
120 | into Perl yourself. |
121 | ||
122 | =item %s: Undefined variable. | |
123 | ||
124 | (A) You've accidentally run your script through B<csh> instead | |
8b1a09fc | 125 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 AD |
126 | into Perl yourself. |
127 | ||
128 | =item %s: not found | |
129 | ||
8b1a09fc | 130 | (A) You've accidentally run your script through the Bourne shell |
131 | instead of Perl. Check the E<lt>#!E<gt> line, or manually feed your script | |
cb1a09d0 AD |
132 | into Perl yourself. |
133 | ||
a0d0e21e LW |
134 | =item B<-P> not allowed for setuid/setgid script |
135 | ||
136 | (F) The script would have to be opened by the C preprocessor by name, | |
137 | which provides a race condition that breaks security. | |
138 | ||
139 | =item C<-T> and C<-B> not implemented on filehandles | |
140 | ||
141 | (F) Perl can't peek at the stdio buffer of filehandles when it doesn't | |
142 | know about your kind of stdio. You'll have to use a filename instead. | |
143 | ||
a5f75d66 AD |
144 | =item 500 Server error |
145 | ||
146 | See Server error. | |
147 | ||
a0d0e21e LW |
148 | =item ?+* follows nothing in regexp |
149 | ||
150 | (F) You started a regular expression with a quantifier. Backslash it | |
151 | if you meant it literally. See L<perlre>. | |
152 | ||
153 | =item @ outside of string | |
154 | ||
2ba9eb46 | 155 | (F) You had a pack template that specified an absolute position outside |
a0d0e21e LW |
156 | the string being unpacked. See L<perlfunc/pack>. |
157 | ||
158 | =item accept() on closed fd | |
159 | ||
160 | (W) You tried to do an accept on a closed socket. Did you forget to check | |
161 | the return value of your socket() call? See L<perlfunc/accept>. | |
162 | ||
163 | =item Allocation too large: %lx | |
164 | ||
165 | (F) You can't allocate more than 64K on an MSDOS machine. | |
166 | ||
167 | =item Arg too short for msgsnd | |
168 | ||
169 | (F) msgsnd() requires a string at least as long as sizeof(long). | |
170 | ||
748a9306 LW |
171 | =item Ambiguous use of %s resolved as %s |
172 | ||
173 | (W)(S) You said something that may not be interpreted the way | |
174 | you thought. Normally it's pretty easy to disambiguate it by supplying | |
175 | a missing quote, operator, paren pair or declaration. | |
176 | ||
a0d0e21e LW |
177 | =item Args must match #! line |
178 | ||
179 | (F) The setuid emulator requires that the arguments Perl was invoked | |
180 | with match the arguments specified on the #! line. | |
181 | ||
182 | =item Argument "%s" isn't numeric | |
183 | ||
184 | (W) The indicated string was fed as an argument to an operator that | |
185 | expected a numeric value instead. If you're fortunate the message | |
186 | will identify which operator was so unfortunate. | |
187 | ||
188 | =item Array @%s missing the @ in argument %d of %s() | |
189 | ||
190 | (D) Really old Perl let you omit the @ on array names in some spots. This | |
191 | is now heavily deprecated. | |
192 | ||
193 | =item assertion botched: %s | |
194 | ||
195 | (P) The malloc package that comes with Perl had an internal failure. | |
196 | ||
197 | =item Assertion failed: file "%s" | |
198 | ||
199 | (P) A general assertion failed. The file in question must be examined. | |
200 | ||
201 | =item Assignment to both a list and a scalar | |
202 | ||
203 | (F) If you assign to a conditional operator, the 2nd and 3rd arguments | |
204 | must either both be scalars or both be lists. Otherwise Perl won't | |
205 | know which context to supply to the right side. | |
206 | ||
207 | =item Attempt to free non-arena SV: 0x%lx | |
208 | ||
209 | (P) All SV objects are supposed to be allocated from arenas that will | |
210 | be garbage collected on exit. An SV was discovered to be outside any | |
211 | of those arenas. | |
212 | ||
213 | =item Attempt to free temp prematurely | |
214 | ||
215 | (W) Mortalized values are supposed to be freed by the free_tmps() | |
216 | routine. This indicates that something else is freeing the SV before | |
217 | the free_tmps() routine gets a chance, which means that the free_tmps() | |
218 | routine will be freeing an unreferenced scalar when it does try to free | |
219 | it. | |
220 | ||
221 | =item Attempt to free unreferenced glob pointers | |
222 | ||
223 | (P) The reference counts got screwed up on symbol aliases. | |
224 | ||
225 | =item Attempt to free unreferenced scalar | |
226 | ||
227 | (W) Perl went to decrement the reference count of a scalar to see if it | |
228 | would go to 0, and discovered that it had already gone to 0 earlier, | |
229 | and should have been freed, and in fact, probably was freed. This | |
230 | could indicate that SvREFCNT_dec() was called too many times, or that | |
231 | SvREFCNT_inc() was called too few times, or that the SV was mortalized | |
232 | when it shouldn't have been, or that memory has been corrupted. | |
233 | ||
b7a902f4 | 234 | =item Attempt to use reference as lvalue in substr |
235 | ||
236 | (W) You supplied a reference as the first argument to substr() used | |
8b1a09fc | 237 | as an lvalue, which is pretty strange. Perhaps you forgot to |
b7a902f4 | 238 | dereference it first. See L<perlfunc/substr>. |
239 | ||
a0d0e21e LW |
240 | =item Bad arg length for %s, is %d, should be %d |
241 | ||
242 | (F) You passed a buffer of the wrong size to one of msgctl(), semctl() or | |
2ba9eb46 | 243 | shmctl(). In C parlance, the correct sizes are, respectively, |
a0d0e21e LW |
244 | S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)> and |
245 | S<sizeof(struct shmid_ds *)>. | |
246 | ||
247 | =item Bad associative array | |
248 | ||
249 | (P) One of the internal hash routines was passed a null HV pointer. | |
250 | ||
251 | =item Bad filehandle: %s | |
252 | ||
253 | (F) A symbol was passed to something wanting a filehandle, but the symbol | |
254 | has no filehandle associated with it. Perhaps you didn't do an open(), or | |
255 | did it in another package. | |
256 | ||
257 | =item Bad free() ignored | |
258 | ||
259 | (S) An internal routine called free() on something that had never been | |
33c8a3fe IZ |
260 | malloc()ed in the first place. Mandatory, but can be disabled by |
261 | setting environment variable C<PERL_BADFREE> to 1. | |
262 | ||
263 | This message can be quite often seen with DB_File on systems with | |
264 | "hard" dynamic linking, like C<AIX> and C<OS/2>. It is a bug of | |
265 | C<Berkeley DB> which is left unnoticed if C<DB> uses I<forgiving> | |
266 | system malloc(). | |
a0d0e21e LW |
267 | |
268 | =item Bad name after %s:: | |
269 | ||
270 | (F) You started to name a symbol by using a package prefix, and then didn't | |
271 | finish the symbol. In particular, you can't interpolate outside of quotes, | |
272 | so | |
273 | ||
274 | $var = 'myvar'; | |
275 | $sym = mypack::$var; | |
276 | ||
277 | is not the same as | |
278 | ||
279 | $var = 'myvar'; | |
280 | $sym = "mypack::$var"; | |
281 | ||
282 | =item Bad symbol for array | |
283 | ||
284 | (P) An internal request asked to add an array entry to something that | |
285 | wasn't a symbol table entry. | |
286 | ||
287 | =item Bad symbol for filehandle | |
288 | ||
289 | (P) An internal request asked to add a filehandle entry to something that | |
290 | wasn't a symbol table entry. | |
291 | ||
292 | =item Bad symbol for hash | |
293 | ||
294 | (P) An internal request asked to add a hash entry to something that | |
295 | wasn't a symbol table entry. | |
296 | ||
8b1a09fc | 297 | =item Badly placed ()'s |
cb1a09d0 AD |
298 | |
299 | (A) You've accidentally run your script through B<csh> instead | |
8b1a09fc | 300 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 AD |
301 | into Perl yourself. |
302 | ||
a0d0e21e LW |
303 | =item BEGIN failed--compilation aborted |
304 | ||
305 | (F) An untrapped exception was raised while executing a BEGIN subroutine. | |
306 | Compilation stops immediately and the interpreter is exited. | |
307 | ||
308 | =item bind() on closed fd | |
309 | ||
310 | (W) You tried to do a bind on a closed socket. Did you forget to check | |
311 | the return value of your socket() call? See L<perlfunc/bind>. | |
312 | ||
4633a7c4 LW |
313 | =item Bizarre copy of %s in %s |
314 | ||
315 | (P) Perl detected an attempt to copy an internal value that is not copiable. | |
316 | ||
a0d0e21e LW |
317 | =item Callback called exit |
318 | ||
319 | (F) A subroutine invoked from an external package via perl_call_sv() | |
320 | exited by calling exit. | |
321 | ||
322 | =item Can't "last" outside a block | |
323 | ||
324 | (F) A "last" statement was executed to break out of the current block, | |
325 | except that there's this itty bitty problem called there isn't a | |
326 | current block. Note that an "if" or "else" block doesn't count as a | |
327 | "loopish" block. You can usually double the curlies to get the same | |
328 | effect though, since the inner curlies will be considered a block | |
329 | that loops once. See L<perlfunc/last>. | |
330 | ||
331 | =item Can't "next" outside a block | |
332 | ||
333 | (F) A "next" statement was executed to reiterate the current block, but | |
334 | there isn't a current block. Note that an "if" or "else" block doesn't | |
335 | count as a "loopish" block. You can usually double the curlies to get | |
336 | the same effect though, since the inner curlies will be considered a block | |
337 | that loops once. See L<perlfunc/last>. | |
338 | ||
339 | =item Can't "redo" outside a block | |
340 | ||
341 | (F) A "redo" statement was executed to restart the current block, but | |
342 | there isn't a current block. Note that an "if" or "else" block doesn't | |
343 | count as a "loopish" block. You can usually double the curlies to get | |
344 | the same effect though, since the inner curlies will be considered a block | |
345 | that loops once. See L<perlfunc/last>. | |
346 | ||
347 | =item Can't bless non-reference value | |
348 | ||
349 | (F) Only hard references may be blessed. This is how Perl "enforces" | |
350 | encapsulation of objects. See L<perlobj>. | |
351 | ||
352 | =item Can't break at that line | |
353 | ||
354 | (S) A warning intended for while running within the debugger, indicating | |
355 | the line number specified wasn't the location of a statement that could | |
356 | be stopped at. | |
357 | ||
358 | =item Can't call method "%s" in empty package "%s" | |
359 | ||
360 | (F) You called a method correctly, and it correctly indicated a package | |
361 | functioning as a class, but that package doesn't have ANYTHING defined | |
362 | in it, let alone methods. See L<perlobj>. | |
363 | ||
364 | =item Can't call method "%s" on unblessed reference | |
365 | ||
366 | (F) A method call must know what package it's supposed to run in. It | |
367 | ordinarily finds this out from the object reference you supply, but | |
368 | you didn't supply an object reference in this case. A reference isn't | |
369 | an object reference until it has been blessed. See L<perlobj>. | |
370 | ||
371 | =item Can't call method "%s" without a package or object reference | |
372 | ||
373 | (F) You used the syntax of a method call, but the slot filled by the | |
374 | object reference or package name contains an expression that returns | |
375 | neither an object reference nor a package name. (Perhaps it's null?) | |
376 | Something like this will reproduce the error: | |
377 | ||
378 | $BADREF = undef; | |
379 | process $BADREF 1,2,3; | |
380 | $BADREF->process(1,2,3); | |
381 | ||
382 | =item Can't chdir to %s | |
383 | ||
384 | (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory | |
385 | that you can chdir to, possibly because it doesn't exist. | |
386 | ||
387 | =item Can't coerce %s to integer in %s | |
388 | ||
389 | (F) Certain types of SVs, in particular real symbol table entries | |
390 | (type GLOB), can't be forced to stop being what they are. So you can't | |
391 | say things like: | |
392 | ||
393 | *foo += 1; | |
394 | ||
395 | You CAN say | |
396 | ||
397 | $foo = *foo; | |
398 | $foo += 1; | |
399 | ||
400 | but then $foo no longer contains a glob. | |
401 | ||
402 | =item Can't coerce %s to number in %s | |
403 | ||
404 | (F) Certain types of SVs, in particular real symbol table entries | |
405 | (type GLOB), can't be forced to stop being what they are. | |
406 | ||
407 | =item Can't coerce %s to string in %s | |
408 | ||
409 | (F) Certain types of SVs, in particular real symbol table entries | |
410 | (type GLOB), can't be forced to stop being what they are. | |
411 | ||
412 | =item Can't create pipe mailbox | |
413 | ||
748a9306 LW |
414 | (P) An error peculiar to VMS. The process is suffering from exhausted quotas |
415 | or other plumbing problems. | |
a0d0e21e LW |
416 | |
417 | =item Can't declare %s in my | |
418 | ||
419 | (F) Only scalar, array and hash variables may be declared as lexical variables. | |
420 | They must have ordinary identifiers as names. | |
421 | ||
422 | =item Can't do inplace edit on %s: %s | |
423 | ||
424 | (S) The creation of the new file failed for the indicated reason. | |
425 | ||
426 | =item Can't do inplace edit without backup | |
427 | ||
428 | (F) You're on a system such as MSDOS that gets confused if you try reading | |
429 | from a deleted (but still opened) file. You have to say B<-i>C<.bak>, or some | |
430 | such. | |
431 | ||
8b1a09fc | 432 | =item Can't do inplace edit: %s E<gt> 14 characters |
a0d0e21e LW |
433 | |
434 | (S) There isn't enough room in the filename to make a backup name for the file. | |
435 | ||
436 | =item Can't do inplace edit: %s is not a regular file | |
437 | ||
438 | (S) You tried to use the B<-i> switch on a special file, such as a file in | |
439 | /dev, or a FIFO. The file was ignored. | |
440 | ||
441 | =item Can't do setegid! | |
442 | ||
443 | (P) The setegid() call failed for some reason in the setuid emulator | |
444 | of suidperl. | |
445 | ||
446 | =item Can't do seteuid! | |
447 | ||
448 | (P) The setuid emulator of suidperl failed for some reason. | |
449 | ||
450 | =item Can't do setuid | |
451 | ||
452 | (F) This typically means that ordinary perl tried to exec suidperl to | |
453 | do setuid emulation, but couldn't exec it. It looks for a name of the | |
454 | form sperl5.000 in the same directory that the perl executable resides | |
455 | under the name perl5.000, typically /usr/local/bin on Unix machines. | |
456 | If the file is there, check the execute permissions. If it isn't, ask | |
457 | your sysadmin why he and/or she removed it. | |
458 | ||
459 | =item Can't do waitpid with flags | |
460 | ||
461 | (F) This machine doesn't have either waitpid() or wait4(), so only waitpid() | |
462 | without flags is emulated. | |
463 | ||
8b1a09fc | 464 | =item Can't do {n,m} with n E<gt> m |
a0d0e21e LW |
465 | |
466 | (F) Minima must be less than or equal to maxima. If you really want | |
467 | your regexp to match something 0 times, just put {0}. See L<perlre>. | |
468 | ||
469 | =item Can't emulate -%s on #! line | |
470 | ||
471 | (F) The #! line specifies a switch that doesn't make sense at this point. | |
472 | For example, it'd be kind of silly to put a B<-x> on the #! line. | |
473 | ||
474 | =item Can't exec "%s": %s | |
475 | ||
476 | (W) An system(), exec() or piped open call could not execute the named | |
477 | program for the indicated reason. Typical reasons include: the permissions | |
478 | were wrong on the file, the file wasn't found in C<$ENV{PATH}>, the | |
479 | executable in question was compiled for another architecture, or the | |
480 | #! line in a script points to an interpreter that can't be run for | |
481 | similar reasons. (Or maybe your system doesn't support #! at all.) | |
482 | ||
483 | =item Can't exec %s | |
484 | ||
485 | (F) Perl was trying to execute the indicated program for you because that's | |
486 | what the #! line said. If that's not what you wanted, you may need to | |
487 | mention "perl" on the #! line somewhere. | |
488 | ||
489 | =item Can't execute %s | |
490 | ||
491 | (F) You used the B<-S> switch, but the script to execute could not be found | |
492 | in the PATH, or at least not with the correct permissions. | |
493 | ||
494 | =item Can't find label %s | |
495 | ||
496 | (F) You said to goto a label that isn't mentioned anywhere that it's possible | |
497 | for us to go to. See L<perlfunc/goto>. | |
498 | ||
499 | =item Can't find string terminator %s anywhere before EOF | |
500 | ||
501 | (F) Perl strings can stretch over multiple lines. This message means that | |
502 | the closing delimiter was omitted. Since bracketed quotes count nesting | |
503 | levels, the following is missing its final parenthesis: | |
504 | ||
505 | print q(The character '(' starts a side comment.) | |
506 | ||
507 | =item Can't fork | |
508 | ||
509 | (F) A fatal error occurred while trying to fork while opening a pipeline. | |
510 | ||
33c8a3fe IZ |
511 | =item Unsupported function fork |
512 | ||
513 | (F) Your version of executable does not support forking. | |
514 | ||
515 | Note that under some systems, like OS/2, there may be different flavors of | |
516 | Perl executables, some of which may support fork, some not. Try changing | |
517 | the name you call Perl by to C<perl_>, C<perl__>, and so on. | |
518 | ||
748a9306 LW |
519 | =item Can't get filespec - stale stat buffer? |
520 | ||
521 | (S) A warning peculiar to VMS. This arises because of the difference between | |
522 | access checks under VMS and under the Unix model Perl assumes. Under VMS, | |
523 | access checks are done by filename, rather than by bits in the stat buffer, so | |
524 | that ACLs and other protections can be taken into account. Unfortunately, Perl | |
525 | assumes that the stat buffer contains all the necessary information, and passes | |
526 | it, instead of the filespec, to the access checking routine. It will try to | |
527 | retrieve the filespec using the device name and FID present in the stat buffer, | |
528 | but this works only if you haven't made a subsequent call to the CRTL stat() | |
529 | routine, since the device name is overwritten with each call. If this warning | |
530 | appears, the name lookup failed, and the access checking routine gave up and | |
531 | returned FALSE, just to be conservative. (Note: The access checking routine | |
532 | knows about the Perl C<stat> operator and file tests, so you shouldn't ever | |
533 | see this warning in response to a Perl command; it arises only if some internal | |
534 | code takes stat buffers lightly.) | |
535 | ||
a0d0e21e LW |
536 | =item Can't get pipe mailbox device name |
537 | ||
748a9306 LW |
538 | (P) An error peculiar to VMS. After creating a mailbox to act as a pipe, Perl |
539 | can't retrieve its name for later use. | |
a0d0e21e LW |
540 | |
541 | =item Can't get SYSGEN parameter value for MAXBUF | |
542 | ||
748a9306 LW |
543 | (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your |
544 | mailbox buffers to be, and didn't get an answer. | |
a0d0e21e LW |
545 | |
546 | =item Can't goto subroutine outside a subroutine | |
547 | ||
548 | (F) The deeply magical "goto subroutine" call can only replace one subroutine | |
549 | call for another. It can't manufacture one out of whole cloth. In general | |
550 | you should only be calling it out of an AUTOLOAD routine anyway. See | |
551 | L<perlfunc/goto>. | |
552 | ||
4633a7c4 LW |
553 | =item Can't localize a reference |
554 | ||
555 | (F) You said something like C<local $$ref>, which is not allowed because | |
556 | the compiler can't determine whether $ref will end up pointing to anything | |
557 | with a symbol table entry, and a symbol table entry is necessary to | |
558 | do a local. | |
559 | ||
748a9306 LW |
560 | =item Can't localize lexical variable %s |
561 | ||
2ba9eb46 | 562 | (F) You used local on a variable name that was previously declared as a |
748a9306 LW |
563 | lexical variable using "my". This is not allowed. If you want to |
564 | localize a package variable of the same name, qualify it with the | |
565 | package name. | |
566 | ||
a0d0e21e LW |
567 | =item Can't locate %s in @INC |
568 | ||
569 | (F) You said to do (or require, or use) a file that couldn't be found | |
570 | in any of the libraries mentioned in @INC. Perhaps you need to set | |
571 | the PERL5LIB environment variable to say where the extra library is, | |
572 | or maybe the script needs to add the library name to @INC. Or maybe | |
573 | you just misspelled the name of the file. See L<perlfunc/require>. | |
574 | ||
575 | =item Can't locate object method "%s" via package "%s" | |
576 | ||
577 | (F) You called a method correctly, and it correctly indicated a package | |
578 | functioning as a class, but that package doesn't define that particular | |
2ba9eb46 | 579 | method, nor does any of its base classes. See L<perlobj>. |
a0d0e21e LW |
580 | |
581 | =item Can't locate package %s for @%s::ISA | |
582 | ||
583 | (W) The @ISA array contained the name of another package that doesn't seem | |
584 | to exist. | |
585 | ||
586 | =item Can't mktemp() | |
587 | ||
588 | (F) The mktemp() routine failed for some reason while trying to process | |
589 | a B<-e> switch. Maybe your /tmp partition is full, or clobbered. | |
590 | ||
591 | =item Can't modify %s in %s | |
592 | ||
593 | (F) You aren't allowed to assign to the item indicated, or otherwise try to | |
594 | change it, such as with an autoincrement. | |
595 | ||
596 | =item Can't modify non-existent substring | |
597 | ||
598 | (P) The internal routine that does assignment to a substr() was handed | |
599 | a NULL. | |
600 | ||
601 | =item Can't msgrcv to readonly var | |
602 | ||
603 | (F) The target of a msgrcv must be modifiable in order to be used as a receive | |
604 | buffer. | |
605 | ||
606 | =item Can't open %s: %s | |
607 | ||
608 | (S) An inplace edit couldn't open the original file for the indicated reason. | |
609 | Usually this is because you don't have read permission for the file. | |
610 | ||
611 | =item Can't open bidirectional pipe | |
612 | ||
613 | (W) You tried to say C<open(CMD, "|cmd|")>, which is not supported. You can | |
614 | try any of several modules in the Perl library to do this, such as | |
8b1a09fc | 615 | "open2.pl". Alternately, direct the pipe's output to a file using "E<gt>", |
a0d0e21e LW |
616 | and then read it in under a different file handle. |
617 | ||
748a9306 LW |
618 | =item Can't open error file %s as stderr |
619 | ||
620 | (F) An error peculiar to VMS. Perl does its own command line redirection, and | |
8b1a09fc | 621 | couldn't open the file specified after '2E<gt>' or '2E<gt>E<gt>' on the |
622 | command line for writing. | |
748a9306 LW |
623 | |
624 | =item Can't open input file %s as stdin | |
625 | ||
626 | (F) An error peculiar to VMS. Perl does its own command line redirection, and | |
8b1a09fc | 627 | couldn't open the file specified after 'E<lt>' on the command line for reading. |
748a9306 LW |
628 | |
629 | =item Can't open output file %s as stdout | |
630 | ||
631 | (F) An error peculiar to VMS. Perl does its own command line redirection, and | |
8b1a09fc | 632 | couldn't open the file specified after 'E<gt>' or 'E<gt>E<gt>' on the command |
633 | line for writing. | |
748a9306 LW |
634 | |
635 | =item Can't open output pipe (name: %s) | |
636 | ||
637 | (P) An error peculiar to VMS. Perl does its own command line redirection, and | |
638 | couldn't open the pipe into which to send data destined for stdout. | |
639 | ||
a0d0e21e LW |
640 | =item Can't open perl script "%s": %s |
641 | ||
642 | (F) The script you specified can't be opened for the indicated reason. | |
643 | ||
644 | =item Can't rename %s to %s: %s, skipping file | |
645 | ||
646 | (S) The rename done by the B<-i> switch failed for some reason, probably because | |
647 | you don't have write permission to the directory. | |
648 | ||
748a9306 LW |
649 | =item Can't reopen input pipe (name: %s) in binary mode |
650 | ||
651 | (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried to | |
652 | reopen it to accept binary data. Alas, it failed. | |
653 | ||
a0d0e21e LW |
654 | =item Can't reswap uid and euid |
655 | ||
656 | (P) The setreuid() call failed for some reason in the setuid emulator | |
657 | of suidperl. | |
658 | ||
659 | =item Can't return outside a subroutine | |
660 | ||
661 | (F) The return statement was executed in mainline code, that is, where | |
662 | there was no subroutine call to return out of. See L<perlsub>. | |
663 | ||
664 | =item Can't stat script "%s" | |
665 | ||
666 | (P) For some reason you can't fstat() the script even though you have | |
667 | it open already. Bizarre. | |
668 | ||
669 | =item Can't swap uid and euid | |
670 | ||
671 | (P) The setreuid() call failed for some reason in the setuid emulator | |
672 | of suidperl. | |
673 | ||
674 | =item Can't take log of %g | |
675 | ||
676 | (F) Logarithms are only defined on positive real numbers. | |
677 | ||
678 | =item Can't take sqrt of %g | |
679 | ||
680 | (F) For ordinary real numbers, you can't take the square root of a | |
681 | negative number. There's a Complex package available for Perl, though, | |
682 | if you really want to do that. | |
683 | ||
684 | =item Can't undef active subroutine | |
685 | ||
686 | (F) You can't undefine a routine that's currently running. You can, | |
687 | however, redefine it while it's running, and you can even undef the | |
688 | redefined subroutine while the old routine is running. Go figure. | |
689 | ||
690 | =item Can't unshift | |
691 | ||
692 | (F) You tried to unshift an "unreal" array that can't be unshifted, such | |
693 | as the main Perl stack. | |
694 | ||
2ba9eb46 | 695 | =item Can't untie: %d inner references still exist |
696 | ||
697 | (F) With "use strict untie" in effect, a copy of the object returned | |
698 | from C<tie> (or C<tied>) was still valid when C<untie> was called. | |
699 | ||
a0d0e21e LW |
700 | =item Can't upgrade that kind of scalar |
701 | ||
702 | (P) The internal sv_upgrade routine adds "members" to an SV, making | |
703 | it into a more specialized kind of SV. The top several SV types are | |
704 | so specialized, however, that they cannot be interconverted. This | |
705 | message indicates that such a conversion was attempted. | |
706 | ||
707 | =item Can't upgrade to undef | |
708 | ||
709 | (P) The undefined SV is the bottom of the totem pole, in the scheme | |
710 | of upgradability. Upgrading to undef indicates an error in the | |
711 | code calling sv_upgrade. | |
712 | ||
c07a80fd | 713 | =item Can't use "my %s" in sort comparison |
714 | ||
715 | (F) The global variables $a and $b are reserved for sort comparisons. | |
8b1a09fc | 716 | You mentioned $a or $b in the same line as the E<lt>=E<gt> or cmp operator, |
c07a80fd | 717 | and the variable had earlier been declared as a lexical variable. |
718 | Either qualify the sort variable with the package name, or rename the | |
719 | lexical variable. | |
720 | ||
a0d0e21e LW |
721 | =item Can't use %s for loop variable |
722 | ||
723 | (F) Only a simple scalar variable may be used as a loop variable on a foreach. | |
724 | ||
725 | =item Can't use %s ref as %s ref | |
726 | ||
727 | (F) You've mixed up your reference types. You have to dereference a | |
728 | reference of the type needed. You can use the ref() function to | |
729 | test the type of the reference, if need be. | |
730 | ||
748a9306 LW |
731 | =item Can't use \1 to mean $1 in expression |
732 | ||
733 | (W) In an ordinary expression, backslash is a unary operator that creates | |
734 | a reference to its argument. The use of backslash to indicate a backreference | |
735 | to a matched substring is only valid as part of a regular expression pattern. | |
736 | Trying to do this in ordinary Perl code produces a value that prints | |
737 | out looking like SCALAR(0xdecaf). Use the $1 form instead. | |
738 | ||
739 | =item Can't use string ("%s") as %s ref while "strict refs" in use | |
a0d0e21e LW |
740 | |
741 | (F) Only hard references are allowed by "strict refs". Symbolic references | |
742 | are disallowed. See L<perlref>. | |
743 | ||
744 | =item Can't use an undefined value as %s reference | |
745 | ||
746 | (F) A value used as either a hard reference or a symbolic reference must | |
747 | be a defined value. This helps to de-lurk some insidious errors. | |
748 | ||
a0d0e21e LW |
749 | =item Can't use global %s in "my" |
750 | ||
751 | (F) You tried to declare a magical variable as a lexical variable. This is | |
752 | not allowed, because the magic can only be tied to one location (namely | |
753 | the global variable) and it would be incredibly confusing to have | |
754 | variables in your program that looked like magical variables but | |
755 | weren't. | |
756 | ||
748a9306 LW |
757 | =item Can't use subscript on %s |
758 | ||
759 | (F) The compiler tried to interpret a bracketed expression as a | |
760 | subscript. But to the left of the brackets was an expression that | |
761 | didn't look like an array reference, or anything else subscriptable. | |
762 | ||
a0d0e21e LW |
763 | =item Can't write to temp file for B<-e>: %s |
764 | ||
765 | (F) The write routine failed for some reason while trying to process | |
766 | a B<-e> switch. Maybe your /tmp partition is full, or clobbered. | |
767 | ||
768 | =item Can't x= to readonly value | |
769 | ||
770 | (F) You tried to repeat a constant value (often the undefined value) with | |
771 | an assignment operator, which implies modifying the value itself. | |
772 | Perhaps you need to copy the value to a temporary, and repeat that. | |
773 | ||
774 | =item Cannot open temporary file | |
775 | ||
8b1a09fc | 776 | (F) The create routine failed for some reason while trying to process |
a0d0e21e LW |
777 | a B<-e> switch. Maybe your /tmp partition is full, or clobbered. |
778 | ||
779 | =item chmod: mode argument is missing initial 0 | |
780 | ||
781 | (W) A novice will sometimes say | |
782 | ||
783 | chmod 777, $filename | |
784 | ||
785 | not realizing that 777 will be interpreted as a decimal number, equivalent | |
786 | to 01411. Octal constants are introduced with a leading 0 in Perl, as in C. | |
787 | ||
8b1a09fc | 788 | =item Close on unopened file E<lt>%sE<gt> |
a0d0e21e LW |
789 | |
790 | (W) You tried to close a filehandle that was never opened. | |
791 | ||
792 | =item connect() on closed fd | |
793 | ||
794 | (W) You tried to do a connect on a closed socket. Did you forget to check | |
795 | the return value of your socket() call? See L<perlfunc/connect>. | |
796 | ||
797 | =item Corrupt malloc ptr 0x%lx at 0x%lx | |
798 | ||
799 | (P) The malloc package that comes with Perl had an internal failure. | |
800 | ||
801 | =item corrupted regexp pointers | |
802 | ||
803 | (P) The regular expression engine got confused by what the regular | |
804 | expression compiler gave it. | |
805 | ||
806 | =item corrupted regexp program | |
807 | ||
808 | (P) The regular expression engine got passed a regexp program without | |
809 | a valid magic number. | |
810 | ||
811 | =item Deep recursion on subroutine "%s" | |
812 | ||
813 | (W) This subroutine has called itself (directly or indirectly) 100 | |
814 | times than it has returned. This probably indicates an infinite | |
815 | recursion, unless you're writing strange benchmark programs, in which | |
816 | case it indicates something else. | |
817 | ||
4633a7c4 LW |
818 | =item Did you mean &%s instead? |
819 | ||
820 | (W) You probably referred to an imported subroutine &FOO as $FOO or some such. | |
821 | ||
748a9306 | 822 | =item Did you mean $ or @ instead of %? |
a0d0e21e | 823 | |
748a9306 LW |
824 | (W) You probably said %hash{$key} when you meant $hash{$key} or @hash{@keys}. |
825 | On the other hand, maybe you just meant %hash and got carried away. | |
826 | ||
827 | =item Do you need to predeclare %s? | |
828 | ||
829 | (S) This is an educated guess made in conjunction with the message "%s | |
830 | found where operator expected". It often means a subroutine or module | |
831 | name is being referenced that hasn't been declared yet. This may be | |
832 | because of ordering problems in your file, or because of a missing | |
833 | "sub", "package", "require", or "use" statement. If you're | |
834 | referencing something that isn't defined yet, you don't actually have | |
835 | to define the subroutine or package before the current location. You | |
836 | can use an empty "sub foo;" or "package FOO;" to enter a "forward" | |
837 | declaration. | |
a0d0e21e LW |
838 | |
839 | =item Don't know how to handle magic of type '%s' | |
840 | ||
841 | (P) The internal handling of magical variables has been cursed. | |
842 | ||
843 | =item do_study: out of memory | |
844 | ||
845 | (P) This should have been caught by safemalloc() instead. | |
846 | ||
847 | =item Duplicate free() ignored | |
848 | ||
849 | (S) An internal routine called free() on something that had already | |
850 | been freed. | |
851 | ||
4633a7c4 LW |
852 | =item elseif should be elsif |
853 | ||
854 | (S) There is no keyword "elseif" in Perl because Larry thinks it's | |
855 | ugly. Your code will be interpreted as an attempt to call a method | |
856 | named "elseif" for the class returned by the following block. This is | |
857 | unlikely to be what you want. | |
858 | ||
a0d0e21e LW |
859 | =item END failed--cleanup aborted |
860 | ||
861 | (F) An untrapped exception was raised while executing an END subroutine. | |
862 | The interpreter is immediately exited. | |
863 | ||
748a9306 LW |
864 | =item Error converting file specification %s |
865 | ||
866 | (F) An error peculiar to VMS. Since Perl may have to deal with file | |
867 | specifications in either VMS or Unix syntax, it converts them to a | |
868 | single form when it must operate on them directly. Either you've | |
869 | passed an invalid file specification to Perl, or you've found a | |
870 | case the conversion routines don't handle. Drat. | |
871 | ||
a0d0e21e LW |
872 | =item Execution of %s aborted due to compilation errors. |
873 | ||
874 | (F) The final summary message when a Perl compilation fails. | |
875 | ||
876 | =item Exiting eval via %s | |
877 | ||
8b1a09fc | 878 | (W) You are exiting an eval by unconventional means, such as |
a0d0e21e LW |
879 | a goto, or a loop control statement. |
880 | ||
881 | =item Exiting subroutine via %s | |
882 | ||
8b1a09fc | 883 | (W) You are exiting a subroutine by unconventional means, such as |
a0d0e21e LW |
884 | a goto, or a loop control statement. |
885 | ||
886 | =item Exiting substitution via %s | |
887 | ||
8b1a09fc | 888 | (W) You are exiting a substitution by unconventional means, such as |
a0d0e21e LW |
889 | a return, a goto, or a loop control statement. |
890 | ||
748a9306 | 891 | =item Fatal VMS error at %s, line %d |
a0d0e21e | 892 | |
748a9306 LW |
893 | (P) An error peculiar to VMS. Something untoward happened in a VMS system |
894 | service or RTL routine; Perl's exit status should provide more details. The | |
895 | filename in "at %s" and the line number in "line %d" tell you which section of | |
896 | the Perl source code is distressed. | |
a0d0e21e LW |
897 | |
898 | =item fcntl is not implemented | |
899 | ||
900 | (F) Your machine apparently doesn't implement fcntl(). What is this, a | |
901 | PDP-11 or something? | |
902 | ||
903 | =item Filehandle %s never opened | |
904 | ||
905 | (W) An I/O operation was attempted on a filehandle that was never initialized. | |
906 | You need to do an open() or a socket() call, or call a constructor from | |
907 | the FileHandle package. | |
908 | ||
909 | =item Filehandle %s opened only for input | |
910 | ||
911 | (W) You tried to write on a read-only filehandle. If you | |
912 | intended it to be a read-write filehandle, you needed to open it with | |
8b1a09fc | 913 | "+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If |
914 | you only intended to write the file, use "E<gt>" or "E<gt>E<gt>". See | |
915 | L<perlfunc/open>. | |
a0d0e21e LW |
916 | |
917 | =item Filehandle only opened for input | |
918 | ||
919 | (W) You tried to write on a read-only filehandle. If you | |
920 | intended it to be a read-write filehandle, you needed to open it with | |
8b1a09fc | 921 | "+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If |
922 | you only intended to write the file, use "E<gt>" or "E<gt>E<gt>". See | |
923 | L<perlfunc/open>. | |
a0d0e21e LW |
924 | |
925 | =item Final $ should be \$ or $name | |
926 | ||
927 | (F) You must now decide whether the final $ in a string was meant to be | |
928 | a literal dollar sign, or was meant to introduce a variable name | |
929 | that happens to be missing. So you have to put either the backslash or | |
930 | the name. | |
931 | ||
932 | =item Final @ should be \@ or @name | |
933 | ||
934 | (F) You must now decide whether the final @ in a string was meant to be | |
935 | a literal "at" sign, or was meant to introduce a variable name | |
936 | that happens to be missing. So you have to put either the backslash or | |
937 | the name. | |
938 | ||
939 | =item Format %s redefined | |
940 | ||
941 | (W) You redefined a format. To suppress this warning, say | |
942 | ||
943 | { | |
944 | local $^W = 0; | |
945 | eval "format NAME =..."; | |
946 | } | |
947 | ||
948 | =item Format not terminated | |
949 | ||
950 | (F) A format must be terminated by a line with a solitary dot. Perl got | |
951 | to the end of your file without finding such a line. | |
952 | ||
953 | =item Found = in conditional, should be == | |
954 | ||
955 | (W) You said | |
956 | ||
957 | if ($foo = 123) | |
958 | ||
959 | when you meant | |
960 | ||
961 | if ($foo == 123) | |
962 | ||
963 | (or something like that). | |
964 | ||
965 | =item gdbm store returned %d, errno %d, key "%s" | |
966 | ||
967 | (S) A warning from the GDBM_File extension that a store failed. | |
968 | ||
969 | =item gethostent not implemented | |
970 | ||
971 | (F) Your C library apparently doesn't implement gethostent(), probably | |
972 | because if it did, it'd feel morally obligated to return every hostname | |
973 | on the Internet. | |
974 | ||
975 | =item get{sock,peer}name() on closed fd | |
976 | ||
977 | (W) You tried to get a socket or peer socket name on a closed socket. | |
978 | Did you forget to check the return value of your socket() call? | |
979 | ||
748a9306 LW |
980 | =item getpwnam returned invalid UIC %#o for user "%s" |
981 | ||
982 | (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the | |
983 | C<getpwnam> operator returned an invalid UIC. | |
984 | ||
985 | ||
a0d0e21e LW |
986 | =item Glob not terminated |
987 | ||
988 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
989 | a term, so it's looking for the corresponding right angle bracket, and not | |
990 | finding it. Chances are you left some needed parentheses out earlier in | |
991 | the line, and you really meant a "less than". | |
992 | ||
993 | =item Global symbol "%s" requires explicit package name | |
994 | ||
995 | (F) You've said "use strict vars", which indicates that all variables must | |
996 | either be lexically scoped (using "my"), or explicitly qualified to | |
997 | say which package the global variable is in (using "::"). | |
998 | ||
999 | =item goto must have label | |
1000 | ||
1001 | (F) Unlike with "next" or "last", you're not allowed to goto an | |
1002 | unspecified destination. See L<perlfunc/goto>. | |
1003 | ||
1004 | =item Had to create %s unexpectedly | |
1005 | ||
1006 | (S) A routine asked for a symbol from a symbol table that ought to have | |
1007 | existed already, but for some reason it didn't, and had to be created on | |
1008 | an emergency basis to prevent a core dump. | |
1009 | ||
1010 | =item Hash %%s missing the % in argument %d of %s() | |
1011 | ||
1012 | (D) Really old Perl let you omit the % on hash names in some spots. This | |
1013 | is now heavily deprecated. | |
1014 | ||
8b1a09fc | 1015 | =item Ill-formed logical name |%s| in prime_env_iter |
a0d0e21e | 1016 | |
8b1a09fc | 1017 | (W) A warning peculiar to VMS. A logical name was encountered when preparing |
1018 | to iterate over %ENV which violates the syntactic rules governing logical | |
1019 | names. Since it cannot be translated normally, it is skipped, and will not | |
1020 | appear in %ENV. This may be a benign occurence, as some software packages | |
1021 | might directly modify logical name tables and introduce non-standard names, | |
1022 | or it may indicate that a logical name table has been corrupted. | |
a0d0e21e LW |
1023 | |
1024 | =item Illegal division by zero | |
1025 | ||
1026 | (F) You tried to divide a number by 0. Either something was wrong in your | |
1027 | logic, or you need to put a conditional in to guard against meaningless input. | |
1028 | ||
1029 | =item Illegal modulus zero | |
1030 | ||
1031 | (F) You tried to divide a number by 0 to get the remainder. Most numbers | |
1032 | don't take to this kindly. | |
1033 | ||
1034 | =item Illegal octal digit | |
1035 | ||
1036 | (F) You used an 8 or 9 in a octal number. | |
1037 | ||
748a9306 LW |
1038 | =item Illegal octal digit ignored |
1039 | ||
1040 | (W) You may have tried to use an 8 or 9 in a octal number. Interpretation | |
1041 | of the octal number stopped before the 8 or 9. | |
1042 | ||
a0d0e21e LW |
1043 | =item Insecure dependency in %s |
1044 | ||
8b1a09fc | 1045 | (F) You tried to do something that the tainting mechanism didn't like. |
a0d0e21e LW |
1046 | The tainting mechanism is turned on when you're running setuid or setgid, |
1047 | or when you specify B<-T> to turn it on explicitly. The tainting mechanism | |
1048 | labels all data that's derived directly or indirectly from the user, | |
1049 | who is considered to be unworthy of your trust. If any such data is | |
1050 | used in a "dangerous" operation, you get this error. See L<perlsec> | |
1051 | for more information. | |
1052 | ||
1053 | =item Insecure directory in %s | |
1054 | ||
1055 | (F) You can't use system(), exec(), or a piped open in a setuid or setgid | |
8b1a09fc | 1056 | script if C<$ENV{PATH}> contains a directory that is writable by the world. |
a0d0e21e LW |
1057 | See L<perlsec>. |
1058 | ||
1059 | =item Insecure PATH | |
1060 | ||
1061 | (F) You can't use system(), exec(), or a piped open in a setuid or | |
8b1a09fc | 1062 | setgid script if C<$ENV{PATH}> is derived from data supplied (or |
a0d0e21e LW |
1063 | potentially supplied) by the user. The script must set the path to a |
1064 | known value, using trustworthy data. See L<perlsec>. | |
1065 | ||
748a9306 LW |
1066 | =item Internal inconsistency in tracking vforks |
1067 | ||
1068 | (S) A warning peculiar to VMS. Perl keeps track of the number | |
1069 | of times you've called C<fork> and C<exec>, in order to determine | |
2ba9eb46 | 1070 | whether the current call to C<exec> should affect the current |
748a9306 LW |
1071 | script or a subprocess (see L<perlvms/exec>). Somehow, this count |
1072 | has become scrambled, so Perl is making a guess and treating | |
1073 | this C<exec> as a request to terminate the Perl script | |
1074 | and execute the specified command. | |
1075 | ||
a0d0e21e LW |
1076 | =item internal disaster in regexp |
1077 | ||
1078 | (P) Something went badly wrong in the regular expression parser. | |
1079 | ||
1080 | =item internal urp in regexp at /%s/ | |
1081 | ||
1082 | (P) Something went badly awry in the regular expression parser. | |
1083 | ||
1084 | =item invalid [] range in regexp | |
1085 | ||
1086 | (F) The range specified in a character class had a minimum character | |
1087 | greater than the maximum character. See L<perlre>. | |
1088 | ||
1089 | =item ioctl is not implemented | |
1090 | ||
1091 | (F) Your machine apparently doesn't implement ioctl(), which is pretty | |
1092 | strange for a machine that supports C. | |
1093 | ||
1094 | =item junk on end of regexp | |
1095 | ||
1096 | (P) The regular expression parser is confused. | |
1097 | ||
1098 | =item Label not found for "last %s" | |
1099 | ||
1100 | (F) You named a loop to break out of, but you're not currently in a | |
1101 | loop of that name, not even if you count where you were called from. | |
1102 | See L<perlfunc/last>. | |
1103 | ||
1104 | =item Label not found for "next %s" | |
1105 | ||
1106 | (F) You named a loop to continue, but you're not currently in a loop of | |
1107 | that name, not even if you count where you were called from. See | |
1108 | L<perlfunc/last>. | |
1109 | ||
1110 | =item Label not found for "redo %s" | |
1111 | ||
1112 | (F) You named a loop to restart, but you're not currently in a loop of | |
1113 | that name, not even if you count where you were called from. See | |
1114 | L<perlfunc/last>. | |
1115 | ||
1116 | =item listen() on closed fd | |
1117 | ||
1118 | (W) You tried to do a listen on a closed socket. Did you forget to check | |
1119 | the return value of your socket() call? See L<perlfunc/listen>. | |
1120 | ||
1121 | =item Literal @%s now requires backslash | |
1122 | ||
1123 | (F) It used to be that Perl would try to guess whether you wanted an | |
1124 | array interpolated or a literal @. It did this when the string was | |
1125 | first used at runtime. Now strings are parsed at compile time, and | |
1126 | ambiguous instances of @ must be disambiguated, either by putting a | |
1127 | backslash to indicate a literal, or by declaring (or using) the array | |
1128 | within the program before the string (lexically). (Someday it will simply | |
1129 | assume that an unbackslashed @ interpolates an array.) | |
1130 | ||
1131 | =item Method for operation %s not found in package %s during blessing | |
1132 | ||
1133 | (F) An attempt was made to specify an entry in an overloading table that | |
8b1a09fc | 1134 | doesn't somehow point to a valid method. See L<overload>. |
a0d0e21e LW |
1135 | |
1136 | =item Might be a runaway multi-line %s string starting on line %d | |
1137 | ||
1138 | (S) An advisory indicating that the previous error may have been caused | |
1139 | by a missing delimiter on a string or pattern, because it eventually | |
1140 | ended earlier on the current line. | |
1141 | ||
1142 | =item Misplaced _ in number | |
1143 | ||
1144 | (W) An underline in a decimal constant wasn't on a 3-digit boundary. | |
1145 | ||
1146 | =item Missing $ on loop variable | |
1147 | ||
8b1a09fc | 1148 | (F) Apparently you've been programming in B<csh> too much. Variables are always |
1149 | mentioned with the $ in Perl, unlike in the shells, where it can vary from | |
a0d0e21e LW |
1150 | one line to the next. |
1151 | ||
1152 | =item Missing comma after first argument to %s function | |
1153 | ||
1154 | (F) While certain functions allow you to specify a filehandle or an | |
1155 | "indirect object" before the argument list, this ain't one of them. | |
1156 | ||
748a9306 LW |
1157 | =item Missing operator before %s? |
1158 | ||
1159 | (S) This is an educated guess made in conjunction with the message "%s | |
1160 | found where operator expected". Often the missing operator is a comma. | |
1161 | ||
a0d0e21e LW |
1162 | =item Missing right bracket |
1163 | ||
1164 | (F) The lexer counted more opening curly brackets (braces) than closing ones. | |
1165 | As a general rule, you'll find it's missing near the place you were last | |
1166 | editing. | |
1167 | ||
1168 | =item Missing semicolon on previous line? | |
1169 | ||
1170 | (S) This is an educated guess made in conjunction with the message "%s | |
1171 | found where operator expected". Don't automatically put a semicolon on | |
1172 | the previous line just because you saw this message. | |
1173 | ||
1174 | =item Modification of a read-only value attempted | |
1175 | ||
1176 | (F) You tried, directly or indirectly, to change the value of a | |
1177 | constant. You didn't, of course, try "2 = 1", since the compiler | |
1178 | catches that. But an easy way to do the same thing is: | |
1179 | ||
1180 | sub mod { $_[0] = 1 } | |
1181 | mod(2); | |
1182 | ||
1183 | Another way is to assign to a substr() that's off the end of the string. | |
1184 | ||
1185 | =item Modification of non-creatable array value attempted, subscript %d | |
1186 | ||
1187 | (F) You tried to make an array value spring into existence, and the | |
1188 | subscript was probably negative, even counting from end of the array | |
1189 | backwards. | |
1190 | ||
1191 | =item Modification of non-creatable hash value attempted, subscript "%s" | |
1192 | ||
1193 | (F) You tried to make a hash value spring into existence, and it couldn't | |
1194 | be created for some peculiar reason. | |
1195 | ||
1196 | =item Module name must be constant | |
1197 | ||
1198 | (F) Only a bare module name is allowed as the first argument to a "use". | |
1199 | ||
1200 | =item msg%s not implemented | |
1201 | ||
1202 | (F) You don't have System V message IPC on your system. | |
1203 | ||
1204 | =item Multidimensional syntax %s not supported | |
1205 | ||
8b1a09fc | 1206 | (W) Multidimensional arrays aren't written like C<$foo[1,2,3]>. They're written |
1207 | like C<$foo[1][2][3]>, as in C. | |
1208 | ||
1209 | =item Name "%s::%s" used only once: possible typo | |
1210 | ||
1211 | (W) Typographical errors often show up as unique variable names. If you | |
1212 | had a good reason for having a unique name, then just mention it | |
1213 | again somehow to suppress the message (the C<use vars> pragma is | |
1214 | provided for just this purpose). | |
a0d0e21e LW |
1215 | |
1216 | =item Negative length | |
1217 | ||
1218 | (F) You tried to do a read/write/send/recv operation with a buffer length | |
1219 | that is less than 0. This is difficult to imagine. | |
1220 | ||
1221 | =item nested *?+ in regexp | |
1222 | ||
1223 | (F) You can't quantify a quantifier without intervening parens. So | |
1224 | things like ** or +* or ?* are illegal. | |
1225 | ||
1226 | Note, however, that the minimal matching quantifiers, *?, +? and ?? appear | |
1227 | to be nested quantifiers, but aren't. See L<perlre>. | |
1228 | ||
1229 | =item No #! line | |
1230 | ||
1231 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
1232 | even on machines that don't support the #! construct. | |
1233 | ||
1234 | =item No %s allowed while running setuid | |
1235 | ||
1236 | (F) Certain operations are deemed to be too insecure for a setuid or setgid | |
1237 | script to even be allowed to attempt. Generally speaking there will be | |
1238 | another way to do what you want that is, if not secure, at least securable. | |
1239 | See L<perlsec>. | |
1240 | ||
1241 | =item No B<-e> allowed in setuid scripts | |
1242 | ||
1243 | (F) A setuid script can't be specified by the user. | |
1244 | ||
1245 | =item No comma allowed after %s | |
1246 | ||
1247 | (F) A list operator that has a filehandle or "indirect object" is not | |
1248 | allowed to have a comma between that and the following arguments. | |
1249 | Otherwise it'd be just another one of the arguments. | |
1250 | ||
748a9306 LW |
1251 | =item No command into which to pipe on command line |
1252 | ||
1253 | (F) An error peculiar to VMS. Perl handles its own command line redirection, | |
1254 | and found a '|' at the end of the command line, so it doesn't know whither you | |
1255 | want to pipe the output from this command. | |
1256 | ||
a0d0e21e LW |
1257 | =item No DB::DB routine defined |
1258 | ||
1259 | (F) The currently executing code was compiled with the B<-d> switch, | |
1260 | but for some reason the perl5db.pl file (or some facsimile thereof) | |
1261 | didn't define a routine to be called at the beginning of each | |
1262 | statement. Which is odd, because the file should have been required | |
1263 | automatically, and should have blown up the require if it didn't parse | |
1264 | right. | |
1265 | ||
1266 | =item No dbm on this machine | |
1267 | ||
1268 | (P) This is counted as an internal error, because every machine should | |
1269 | supply dbm nowadays, since Perl comes with SDBM. See L<SDBM_File>. | |
1270 | ||
1271 | =item No DBsub routine | |
1272 | ||
1273 | (F) The currently executing code was compiled with the B<-d> switch, | |
1274 | but for some reason the perl5db.pl file (or some facsimile thereof) | |
1275 | didn't define a DB::sub routine to be called at the beginning of each | |
1276 | ordinary subroutine call. | |
1277 | ||
8b1a09fc | 1278 | =item No error file after 2E<gt> or 2E<gt>E<gt> on command line |
748a9306 LW |
1279 | |
1280 | (F) An error peculiar to VMS. Perl handles its own command line redirection, | |
8b1a09fc | 1281 | and found a '2E<gt>' or a '2E<gt>E<gt>' on the command line, but can't find |
1282 | the name of the file to which to write data destined for stderr. | |
748a9306 | 1283 | |
8b1a09fc | 1284 | =item No input file after E<lt> on command line |
748a9306 LW |
1285 | |
1286 | (F) An error peculiar to VMS. Perl handles its own command line redirection, | |
8b1a09fc | 1287 | and found a 'E<lt>' on the command line, but can't find the name of the file |
1288 | from which to read data for stdin. | |
748a9306 | 1289 | |
8b1a09fc | 1290 | =item No output file after E<gt> on command line |
748a9306 LW |
1291 | |
1292 | (F) An error peculiar to VMS. Perl handles its own command line redirection, | |
8b1a09fc | 1293 | and found a lone 'E<gt>' at the end of the command line, so it doesn't know |
1294 | whither you wanted to redirect stdout. | |
748a9306 | 1295 | |
8b1a09fc | 1296 | =item No output file after E<gt> or E<gt>E<gt> on command line |
748a9306 LW |
1297 | |
1298 | (F) An error peculiar to VMS. Perl handles its own command line redirection, | |
8b1a09fc | 1299 | and found a 'E<gt>' or a 'E<gt>E<gt>' on the command line, but can't find the |
1300 | name of the file to which to write data destined for stdout. | |
748a9306 | 1301 | |
a0d0e21e LW |
1302 | =item No Perl script found in input |
1303 | ||
1304 | (F) You called C<perl -x>, but no line was found in the file beginning | |
1305 | with #! and containing the word "perl". | |
1306 | ||
1307 | =item No setregid available | |
1308 | ||
1309 | (F) Configure didn't find anything resembling the setregid() call for | |
1310 | your system. | |
1311 | ||
1312 | =item No setreuid available | |
1313 | ||
1314 | (F) Configure didn't find anything resembling the setreuid() call for | |
1315 | your system. | |
1316 | ||
1317 | =item No space allowed after B<-I> | |
1318 | ||
1319 | (F) The argument to B<-I> must follow the B<-I> immediately with no | |
1320 | intervening space. | |
1321 | ||
748a9306 LW |
1322 | =item No such pipe open |
1323 | ||
1324 | (P) An error peculiar to VMS. The internal routine my_pclose() tried to | |
1325 | close a pipe which hadn't been opened. This should have been caught earlier as | |
1326 | an attempt to close an unopened filehandle. | |
1327 | ||
a0d0e21e LW |
1328 | =item No such signal: SIG%s |
1329 | ||
1330 | (W) You specified a signal name as a subscript to %SIG that was not recognized. | |
1331 | Say C<kill -l> in your shell to see the valid signal names on your system. | |
1332 | ||
1333 | =item Not a CODE reference | |
1334 | ||
1335 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
1336 | subroutine), but found a reference to something else instead. You can | |
1337 | use the ref() function to find out what kind of ref it really was. | |
1338 | See also L<perlref>. | |
1339 | ||
1340 | =item Not a format reference | |
1341 | ||
1342 | (F) I'm not sure how you managed to generate a reference to an anonymous | |
1343 | format, but this indicates you did, and that it didn't exist. | |
1344 | ||
1345 | =item Not a GLOB reference | |
1346 | ||
1347 | (F) Perl was trying to evaluate a reference to a "type glob" (that is, | |
1348 | a symbol table entry that looks like C<*foo>), but found a reference to | |
1349 | something else instead. You can use the ref() function to find out | |
1350 | what kind of ref it really was. See L<perlref>. | |
1351 | ||
1352 | =item Not a HASH reference | |
1353 | ||
1354 | (F) Perl was trying to evaluate a reference to a hash value, but | |
1355 | found a reference to something else instead. You can use the ref() | |
1356 | function to find out what kind of ref it really was. See L<perlref>. | |
1357 | ||
1358 | =item Not a perl script | |
1359 | ||
1360 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
1361 | even on machines that don't support the #! construct. The line must | |
1362 | mention perl. | |
1363 | ||
1364 | =item Not a SCALAR reference | |
1365 | ||
1366 | (F) Perl was trying to evaluate a reference to a scalar value, but | |
1367 | found a reference to something else instead. You can use the ref() | |
1368 | function to find out what kind of ref it really was. See L<perlref>. | |
1369 | ||
1370 | =item Not a subroutine reference | |
1371 | ||
1372 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
1373 | subroutine), but found a reference to something else instead. You can | |
1374 | use the ref() function to find out what kind of ref it really was. | |
1375 | See also L<perlref>. | |
1376 | ||
1377 | =item Not a subroutine reference in %OVERLOAD | |
1378 | ||
1379 | (F) An attempt was made to specify an entry in an overloading table that | |
8b1a09fc | 1380 | doesn't somehow point to a valid subroutine. See L<overload>. |
a0d0e21e LW |
1381 | |
1382 | =item Not an ARRAY reference | |
1383 | ||
1384 | (F) Perl was trying to evaluate a reference to an array value, but | |
1385 | found a reference to something else instead. You can use the ref() | |
1386 | function to find out what kind of ref it really was. See L<perlref>. | |
1387 | ||
1388 | =item Not enough arguments for %s | |
1389 | ||
1390 | (F) The function requires more arguments than you specified. | |
1391 | ||
1392 | =item Not enough format arguments | |
1393 | ||
1394 | (W) A format specified more picture fields than the next line supplied. | |
1395 | See L<perlform>. | |
1396 | ||
1397 | =item Null filename used | |
1398 | ||
1399 | (F) You can't require the null filename, especially since on many machines | |
1400 | that means the current directory! See L<perlfunc/require>. | |
1401 | ||
1402 | =item NULL OP IN RUN | |
1403 | ||
1404 | (P) Some internal routine called run() with a null opcode pointer. | |
1405 | ||
1406 | =item Null realloc | |
1407 | ||
1408 | (P) An attempt was made to realloc NULL. | |
1409 | ||
1410 | =item NULL regexp argument | |
1411 | ||
1412 | (P) The internal pattern matching routines blew it bigtime. | |
1413 | ||
1414 | =item NULL regexp parameter | |
1415 | ||
1416 | (P) The internal pattern matching routines are out of their gourd. | |
1417 | ||
1418 | =item Odd number of elements in hash list | |
1419 | ||
1420 | (S) You specified an odd number of elements to a hash list, which is odd, | |
1421 | since hash lists come in key/value pairs. | |
1422 | ||
1423 | =item oops: oopsAV | |
1424 | ||
1425 | (S) An internal warning that the grammar is screwed up. | |
1426 | ||
1427 | =item oops: oopsHV | |
1428 | ||
1429 | (S) An internal warning that the grammar is screwed up. | |
1430 | ||
1431 | =item Operation `%s' %s: no method found, | |
1432 | ||
1433 | (F) An attempt was made to use an entry in an overloading table that | |
8b1a09fc | 1434 | somehow no longer points to a valid method. See L<overload>. |
a0d0e21e | 1435 | |
748a9306 LW |
1436 | =item Operator or semicolon missing before %s |
1437 | ||
1438 | (S) You used a variable or subroutine call where the parser was | |
1439 | expecting an operator. The parser has assumed you really meant | |
1440 | to use an operator, but this is highly likely to be incorrect. | |
1441 | For example, if you say "*foo *foo" it will be interpreted as | |
1442 | if you said "*foo * 'foo'". | |
1443 | ||
a0d0e21e LW |
1444 | =item Out of memory for yacc stack |
1445 | ||
1446 | (F) The yacc parser wanted to grow its stack so it could continue parsing, | |
1447 | but realloc() wouldn't give it more memory, virtual or otherwise. | |
1448 | ||
1449 | =item Out of memory! | |
1450 | ||
1451 | (X) The malloc() function returned 0, indicating there was insufficient | |
1452 | remaining memory (or virtual memory) to satisfy the request. | |
1453 | ||
1454 | =item page overflow | |
1455 | ||
1456 | (W) A single call to write() produced more lines than can fit on a page. | |
1457 | See L<perlform>. | |
1458 | ||
1459 | =item panic: ck_grep | |
1460 | ||
1461 | (P) Failed an internal consistency check trying to compile a grep. | |
1462 | ||
1463 | =item panic: ck_split | |
1464 | ||
1465 | (P) Failed an internal consistency check trying to compile a split. | |
1466 | ||
1467 | =item panic: corrupt saved stack index | |
1468 | ||
1469 | (P) The savestack was requested to restore more localized values than there | |
1470 | are in the savestack. | |
1471 | ||
1472 | =item panic: die %s | |
1473 | ||
1474 | (P) We popped the context stack to an eval context, and then discovered | |
1475 | it wasn't an eval context. | |
1476 | ||
1477 | =item panic: do_match | |
1478 | ||
1479 | (P) The internal pp_match() routine was called with invalid operational data. | |
1480 | ||
1481 | =item panic: do_split | |
1482 | ||
1483 | (P) Something terrible went wrong in setting up for the split. | |
1484 | ||
1485 | =item panic: do_subst | |
1486 | ||
1487 | (P) The internal pp_subst() routine was called with invalid operational data. | |
1488 | ||
1489 | =item panic: do_trans | |
1490 | ||
1491 | (P) The internal do_trans() routine was called with invalid operational data. | |
1492 | ||
1493 | =item panic: goto | |
1494 | ||
1495 | (P) We popped the context stack to a context with the specified label, | |
1496 | and then discovered it wasn't a context we know how to do a goto in. | |
1497 | ||
1498 | =item panic: INTERPCASEMOD | |
1499 | ||
1500 | (P) The lexer got into a bad state at a case modifier. | |
1501 | ||
1502 | =item panic: INTERPCONCAT | |
1503 | ||
1504 | (P) The lexer got into a bad state parsing a string with brackets. | |
1505 | ||
1506 | =item panic: last | |
1507 | ||
1508 | (P) We popped the context stack to a block context, and then discovered | |
1509 | it wasn't a block context. | |
1510 | ||
1511 | =item panic: leave_scope clearsv | |
1512 | ||
1513 | (P) A writable lexical variable became readonly somehow within the scope. | |
1514 | ||
1515 | =item panic: leave_scope inconsistency | |
1516 | ||
1517 | (P) The savestack probably got out of sync. At least, there was an | |
1518 | invalid enum on the top of it. | |
1519 | ||
1520 | =item panic: malloc | |
1521 | ||
1522 | (P) Something requested a negative number of bytes of malloc. | |
1523 | ||
1524 | =item panic: mapstart | |
1525 | ||
1526 | (P) The compiler is screwed up with respect to the map() function. | |
1527 | ||
1528 | =item panic: null array | |
1529 | ||
1530 | (P) One of the internal array routines was passed a null AV pointer. | |
1531 | ||
1532 | =item panic: pad_alloc | |
1533 | ||
1534 | (P) The compiler got confused about which scratch pad it was allocating | |
1535 | and freeing temporaries and lexicals from. | |
1536 | ||
1537 | =item panic: pad_free curpad | |
1538 | ||
1539 | (P) The compiler got confused about which scratch pad it was allocating | |
1540 | and freeing temporaries and lexicals from. | |
1541 | ||
1542 | =item panic: pad_free po | |
1543 | ||
1544 | (P) An invalid scratch pad offset was detected internally. | |
1545 | ||
1546 | =item panic: pad_reset curpad | |
1547 | ||
1548 | (P) The compiler got confused about which scratch pad it was allocating | |
1549 | and freeing temporaries and lexicals from. | |
1550 | ||
1551 | =item panic: pad_sv po | |
1552 | ||
1553 | (P) An invalid scratch pad offset was detected internally. | |
1554 | ||
1555 | =item panic: pad_swipe curpad | |
1556 | ||
1557 | (P) The compiler got confused about which scratch pad it was allocating | |
1558 | and freeing temporaries and lexicals from. | |
1559 | ||
1560 | =item panic: pad_swipe po | |
1561 | ||
1562 | (P) An invalid scratch pad offset was detected internally. | |
1563 | ||
1564 | =item panic: pp_iter | |
1565 | ||
1566 | (P) The foreach iterator got called in a non-loop context frame. | |
1567 | ||
1568 | =item panic: realloc | |
1569 | ||
1570 | (P) Something requested a negative number of bytes of realloc. | |
1571 | ||
1572 | =item panic: restartop | |
1573 | ||
1574 | (P) Some internal routine requested a goto (or something like it), and | |
1575 | didn't supply the destination. | |
1576 | ||
1577 | =item panic: return | |
1578 | ||
1579 | (P) We popped the context stack to a subroutine or eval context, and | |
1580 | then discovered it wasn't a subroutine or eval context. | |
1581 | ||
1582 | =item panic: scan_num | |
1583 | ||
1584 | (P) scan_num() got called on something that wasn't a number. | |
1585 | ||
1586 | =item panic: sv_insert | |
1587 | ||
1588 | (P) The sv_insert() routine was told to remove more string than there | |
1589 | was string. | |
1590 | ||
1591 | =item panic: top_env | |
1592 | ||
1593 | (P) The compiler attempted to do a goto, or something weird like that. | |
1594 | ||
1595 | =item panic: yylex | |
1596 | ||
1597 | (P) The lexer got into a bad state while processing a case modifier. | |
1598 | ||
1599 | =item Parens missing around "%s" list | |
1600 | ||
1601 | (W) You said something like | |
1602 | ||
1603 | my $foo, $bar = @_; | |
1604 | ||
1605 | when you meant | |
1606 | ||
1607 | my ($foo, $bar) = @_; | |
1608 | ||
1609 | Remember that "my" and "local" bind closer than comma. | |
1610 | ||
1611 | =item Perl %3.3f required--this is only version %s, stopped | |
1612 | ||
1613 | (F) The module in question uses features of a version of Perl more recent | |
1614 | than the currently running version. How long has it been since you upgraded, | |
1615 | anyway? See L<perlfunc/require>. | |
1616 | ||
1617 | =item Permission denied | |
1618 | ||
1619 | (F) The setuid emulator in suidperl decided you were up to no good. | |
1620 | ||
748a9306 LW |
1621 | =item pid %d not a child |
1622 | ||
1623 | (W) A warning peculiar to VMS. Waitpid() was asked to wait for a process which | |
1624 | isn't a subprocess of the current process. While this is fine from VMS' | |
1625 | perspective, it's probably not what you intended. | |
1626 | ||
a0d0e21e LW |
1627 | =item POSIX getpgrp can't take an argument |
1628 | ||
1629 | (F) Your C compiler uses POSIX getpgrp(), which takes no argument, unlike | |
1630 | the BSD version, which takes a pid. | |
1631 | ||
1632 | =item Possible memory corruption: %s overflowed 3rd argument | |
1633 | ||
1634 | (F) An ioctl() or fcntl() returned more than Perl was bargaining for. | |
1635 | Perl guesses a reasonable buffer size, but puts a sentinel byte at the | |
1636 | end of the buffer just in case. This sentinel byte got clobbered, and | |
1637 | Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>. | |
1638 | ||
1639 | =item Precedence problem: open %s should be open(%s) | |
1640 | ||
1641 | (S) The old irregular construct | |
cb1a09d0 | 1642 | |
a0d0e21e LW |
1643 | open FOO || die; |
1644 | ||
1645 | is now misinterpreted as | |
1646 | ||
1647 | open(FOO || die); | |
1648 | ||
1649 | because of the strict regularization of Perl 5's grammar into unary and | |
1650 | list operators. (The old open was a little of both.) You must put | |
1651 | parens around the filehandle, or use the new "or" operator instead of "||". | |
1652 | ||
1653 | =item print on closed filehandle %s | |
1654 | ||
1655 | (W) The filehandle you're printing on got itself closed sometime before now. | |
1656 | Check your logic flow. | |
1657 | ||
1658 | =item printf on closed filehandle %s | |
1659 | ||
1660 | (W) The filehandle you're writing to got itself closed sometime before now. | |
1661 | Check your logic flow. | |
1662 | ||
1663 | =item Probable precedence problem on %s | |
1664 | ||
1665 | (W) The compiler found a bare word where it expected a conditional, | |
1666 | which often indicates that an || or && was parsed as part of the | |
1667 | last argument of the previous construct, for example: | |
1668 | ||
1669 | open FOO || die; | |
1670 | ||
4633a7c4 LW |
1671 | =item Prototype mismatch: (%s) vs (%s) |
1672 | ||
1673 | (S) The subroutine being defined had a predeclared (forward) declaration | |
1674 | with a different function prototype. | |
1675 | ||
8b1a09fc | 1676 | =item Read on closed filehandle E<lt>%sE<gt> |
a0d0e21e LW |
1677 | |
1678 | (W) The filehandle you're reading from got itself closed sometime before now. | |
1679 | Check your logic flow. | |
1680 | ||
1681 | =item Reallocation too large: %lx | |
1682 | ||
1683 | (F) You can't allocate more than 64K on an MSDOS machine. | |
1684 | ||
1685 | =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch | |
1686 | ||
1687 | (F) You can't use the B<-D> option unless the code to produce the | |
1688 | desired output is compiled into Perl, which entails some overhead, | |
1689 | which is why it's currently left out of your copy. | |
1690 | ||
1691 | =item Recursive inheritance detected | |
1692 | ||
1693 | (F) More than 100 levels of inheritance were used. Probably indicates | |
1694 | an unintended loop in your inheritance hierarchy. | |
1695 | ||
1696 | =item Reference miscount in sv_replace() | |
1697 | ||
1698 | (W) The internal sv_replace() function was handed a new SV with a | |
1699 | reference count of other than 1. | |
1700 | ||
1701 | =item regexp memory corruption | |
1702 | ||
1703 | (P) The regular expression engine got confused by what the regular | |
1704 | expression compiler gave it. | |
1705 | ||
1706 | =item regexp out of space | |
1707 | ||
1708 | (P) A "can't happen" error, because safemalloc() should have caught it earlier. | |
1709 | ||
1710 | =item regexp too big | |
1711 | ||
2ba9eb46 | 1712 | (F) The current implementation of regular expressions uses shorts as |
a0d0e21e LW |
1713 | address offsets within a string. Unfortunately this means that if |
1714 | the regular expression compiles to longer than 32767, it'll blow up. | |
1715 | Usually when you want a regular expression this big, there is a better | |
1716 | way to do it with multiple statements. See L<perlre>. | |
1717 | ||
1718 | =item Reversed %s= operator | |
1719 | ||
1720 | (W) You wrote your assignment operator backwards. The = must always | |
1721 | comes last, to avoid ambiguity with subsequent unary operators. | |
1722 | ||
1723 | =item Runaway format | |
1724 | ||
1725 | (F) Your format contained the ~~ repeat-until-blank sequence, but it | |
1726 | produced 200 lines at once, and the 200th line looked exactly like the | |
1727 | 199th line. Apparently you didn't arrange for the arguments to exhaust | |
1728 | themselves, either by using ^ instead of @ (for scalar variables), or by | |
1729 | shifting or popping (for array variables). See L<perlform>. | |
1730 | ||
1731 | =item Scalar value @%s[%s] better written as $%s[%s] | |
1732 | ||
1733 | (W) You've used an array slice (indicated by @) to select a single value of | |
1734 | an array. Generally it's better to ask for a scalar value (indicated by $). | |
8b1a09fc | 1735 | The difference is that C<$foo[&bar]> always behaves like a scalar, both when |
1736 | assigning to it and when evaluating its argument, while C<@foo[&bar]> behaves | |
a0d0e21e LW |
1737 | like a list when you assign to it, and provides a list context to its |
1738 | subscript, which can do weird things if you're only expecting one subscript. | |
1739 | ||
748a9306 LW |
1740 | On the other hand, if you were actually hoping to treat the array |
1741 | element as a list, you need to look into how references work, since | |
1742 | Perl will not magically convert between scalars and lists for you. See | |
1743 | L<perlref>. | |
1744 | ||
a0d0e21e LW |
1745 | =item Script is not setuid/setgid in suidperl |
1746 | ||
1747 | (F) Oddly, the suidperl program was invoked on a script with its setuid | |
8b1a09fc | 1748 | or setgid bit not set. This doesn't make much sense. |
a0d0e21e LW |
1749 | |
1750 | =item Search pattern not terminated | |
1751 | ||
1752 | (F) The lexer couldn't find the final delimiter of a // or m{} | |
1753 | construct. Remember that bracketing delimiters count nesting level. | |
1754 | ||
1755 | =item seek() on unopened file | |
1756 | ||
1757 | (W) You tried to use the seek() function on a filehandle that was either | |
1758 | never opened or has been closed since. | |
1759 | ||
1760 | =item select not implemented | |
1761 | ||
1762 | (F) This machine doesn't implement the select() system call. | |
1763 | ||
1764 | =item sem%s not implemented | |
1765 | ||
1766 | (F) You don't have System V semaphore IPC on your system. | |
1767 | ||
1768 | =item semi-panic: attempt to dup freed string | |
1769 | ||
1770 | (S) The internal newSVsv() routine was called to duplicate a scalar | |
1771 | that had previously been marked as free. | |
1772 | ||
1773 | =item Semicolon seems to be missing | |
1774 | ||
1775 | (W) A nearby syntax error was probably caused by a missing semicolon, | |
1776 | or possibly some other missing operator, such as a comma. | |
1777 | ||
1778 | =item Send on closed socket | |
1779 | ||
1780 | (W) The filehandle you're sending to got itself closed sometime before now. | |
1781 | Check your logic flow. | |
1782 | ||
1783 | =item Sequence (?#... not terminated | |
1784 | ||
1785 | (F) A regular expression comment must be terminated by a closing | |
1786 | parenthesis. Embedded parens aren't allowed. See L<perlre>. | |
1787 | ||
1788 | =item Sequence (?%s...) not implemented | |
1789 | ||
1790 | (F) A proposed regular expression extension has the character reserved | |
1791 | but has not yet been written. See L<perlre>. | |
1792 | ||
1793 | =item Sequence (?%s...) not recognized | |
1794 | ||
1795 | (F) You used a regular expression extension that doesn't make sense. | |
1796 | See L<perlre>. | |
1797 | ||
a5f75d66 AD |
1798 | =item Server error |
1799 | ||
1800 | Also known as "500 Server error". This is a CGI error, not a Perl | |
1801 | error. You need to make sure your script is executable, is accessible | |
1802 | by the user CGI is running the script under (which is probably not | |
1803 | the user account you tested it under), does not rely on any environment | |
1804 | variables (like PATH) from the user it isn't running under, and isn't | |
1805 | in a location where the CGI server can't find it, basically, more or less. | |
1806 | ||
a0d0e21e LW |
1807 | =item setegid() not implemented |
1808 | ||
8b1a09fc | 1809 | (F) You tried to assign to C<$)>, and your operating system doesn't support |
a0d0e21e LW |
1810 | the setegid() system call (or equivalent), or at least Configure didn't |
1811 | think so. | |
1812 | ||
1813 | =item seteuid() not implemented | |
1814 | ||
8b1a09fc | 1815 | (F) You tried to assign to C<$E<gt>>, and your operating system doesn't support |
a0d0e21e LW |
1816 | the seteuid() system call (or equivalent), or at least Configure didn't |
1817 | think so. | |
1818 | ||
1819 | =item setrgid() not implemented | |
1820 | ||
8b1a09fc | 1821 | (F) You tried to assign to C<$(>, and your operating system doesn't support |
a0d0e21e LW |
1822 | the setrgid() system call (or equivalent), or at least Configure didn't |
1823 | think so. | |
1824 | ||
1825 | =item setruid() not implemented | |
1826 | ||
8b1a09fc | 1827 | (F) You tried to assign to C<$<lt>>, and your operating system doesn't support |
a0d0e21e LW |
1828 | the setruid() system call (or equivalent), or at least Configure didn't |
1829 | think so. | |
1830 | ||
1831 | =item Setuid/gid script is writable by world | |
1832 | ||
1833 | (F) The setuid emulator won't run a script that is writable by the world, | |
1834 | because the world might have written on it already. | |
1835 | ||
1836 | =item shm%s not implemented | |
1837 | ||
1838 | (F) You don't have System V shared memory IPC on your system. | |
1839 | ||
1840 | =item shutdown() on closed fd | |
1841 | ||
1842 | (W) You tried to do a shutdown on a closed socket. Seems a bit superfluous. | |
1843 | ||
1844 | =item SIG%s handler "%s" not defined. | |
1845 | ||
1846 | (W) The signal handler named in %SIG doesn't, in fact, exist. Perhaps you | |
1847 | put it into the wrong package? | |
1848 | ||
1849 | =item sort is now a reserved word | |
1850 | ||
1851 | (F) An ancient error message that almost nobody ever runs into anymore. | |
1852 | But before sort was a keyword, people sometimes used it as a filehandle. | |
1853 | ||
1854 | =item Sort subroutine didn't return a numeric value | |
1855 | ||
1856 | (F) A sort comparison routine must return a number. You probably blew | |
4633a7c4 | 1857 | it by not using C<E<lt>=E<gt>> or C<cmp>, or by not using them correctly. |
a0d0e21e LW |
1858 | See L<perlfunc/sort>. |
1859 | ||
1860 | =item Sort subroutine didn't return single value | |
1861 | ||
1862 | (F) A sort comparison subroutine may not return a list value with more | |
1863 | or less than one element. See L<perlfunc/sort>. | |
1864 | ||
1865 | =item Split loop | |
1866 | ||
1867 | (P) The split was looping infinitely. (Obviously, a split shouldn't iterate | |
1868 | more times than there are characters of input, which is what happened.) | |
1869 | See L<perlfunc/split>. | |
1870 | ||
8b1a09fc | 1871 | =item Stat on unopened file E<lt>%sE<gt> |
a0d0e21e LW |
1872 | |
1873 | (W) You tried to use the stat() function (or an equivalent file test) | |
1874 | on a filehandle that was either never opened or has been closed since. | |
1875 | ||
1876 | =item Statement unlikely to be reached | |
1877 | ||
1878 | (W) You did an exec() with some statement after it other than a die(). | |
1879 | This is almost always an error, because exec() never returns unless | |
1880 | there was a failure. You probably wanted to use system() instead, | |
1881 | which does return. To suppress this warning, put the exec() in a block | |
1882 | by itself. | |
1883 | ||
1884 | =item Subroutine %s redefined | |
1885 | ||
1886 | (W) You redefined a subroutine. To suppress this warning, say | |
1887 | ||
1888 | { | |
1889 | local $^W = 0; | |
1890 | eval "sub name { ... }"; | |
1891 | } | |
1892 | ||
1893 | =item Substitution loop | |
1894 | ||
1895 | (P) The substitution was looping infinitely. (Obviously, a | |
1896 | substitution shouldn't iterate more times than there are characters of | |
1897 | input, which is what happened.) See the discussion of substitution in | |
1898 | L<perlop/"Quote and Quotelike Operators">. | |
1899 | ||
1900 | =item Substitution pattern not terminated | |
1901 | ||
1902 | (F) The lexer couldn't find the interior delimiter of a s/// or s{}{} | |
1903 | construct. Remember that bracketing delimiters count nesting level. | |
1904 | ||
1905 | =item Substitution replacement not terminated | |
1906 | ||
1907 | (F) The lexer couldn't find the final delimiter of a s/// or s{}{} | |
1908 | construct. Remember that bracketing delimiters count nesting level. | |
1909 | ||
1910 | =item substr outside of string | |
1911 | ||
1912 | (W) You tried to reference a substr() that pointed outside of a string. | |
1913 | That is, the absolute value of the offset was larger than the length of | |
1914 | the string. See L<perlfunc/substr>. | |
1915 | ||
1916 | =item suidperl is no longer needed since... | |
1917 | ||
1918 | (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a | |
1919 | version of the setuid emulator somehow got run anyway. | |
1920 | ||
1921 | =item syntax error | |
1922 | ||
1923 | (F) Probably means you had a syntax error. Common reasons include: | |
1924 | ||
1925 | A keyword is misspelled. | |
1926 | A semicolon is missing. | |
1927 | A comma is missing. | |
1928 | An opening or closing parenthesis is missing. | |
1929 | An opening or closing brace is missing. | |
1930 | A closing quote is missing. | |
1931 | ||
1932 | Often there will be another error message associated with the syntax | |
1933 | error giving more information. (Sometimes it helps to turn on B<-w>.) | |
1934 | The error message itself often tells you where it was in the line when | |
1935 | it decided to give up. Sometimes the actual error is several tokens | |
1936 | before this, since Perl is good at understanding random input. | |
1937 | Occasionally the line number may be misleading, and once in a blue moon | |
1938 | the only way to figure out what's triggering the error is to call | |
1939 | C<perl -c> repeatedly, chopping away half the program each time to see | |
1940 | if the error went away. Sort of the cybernetic version of S<20 questions>. | |
1941 | ||
cb1a09d0 AD |
1942 | =item syntax error at line %d: `%s' unexpected |
1943 | ||
8b1a09fc | 1944 | (A) You've accidentally run your script through the Bourne shell |
1945 | instead of Perl. Check the E<lt>#!E<gt> line, or manually feed your script | |
cb1a09d0 AD |
1946 | into Perl yourself. |
1947 | ||
a0d0e21e LW |
1948 | =item System V IPC is not implemented on this machine |
1949 | ||
1950 | (F) You tried to do something with a function beginning with "sem", "shm" | |
1951 | or "msg". See L<perlfunc/semctl>, for example. | |
1952 | ||
1953 | =item Syswrite on closed filehandle | |
1954 | ||
1955 | (W) The filehandle you're writing to got itself closed sometime before now. | |
1956 | Check your logic flow. | |
1957 | ||
1958 | =item tell() on unopened file | |
1959 | ||
1960 | (W) You tried to use the tell() function on a filehandle that was either | |
1961 | never opened or has been closed since. | |
1962 | ||
8b1a09fc | 1963 | =item Test on unopened file E<lt>%sE<gt> |
a0d0e21e LW |
1964 | |
1965 | (W) You tried to invoke a file test operator on a filehandle that isn't | |
1966 | open. Check your logic. See also L<perlfunc/-X>. | |
1967 | ||
1968 | =item That use of $[ is unsupported | |
1969 | ||
8b1a09fc | 1970 | (F) Assignment to C<$[> is now strictly circumscribed, and interpreted as |
a0d0e21e LW |
1971 | a compiler directive. You may only say one of |
1972 | ||
1973 | $[ = 0; | |
1974 | $[ = 1; | |
1975 | ... | |
1976 | local $[ = 0; | |
1977 | local $[ = 1; | |
1978 | ... | |
1979 | ||
1980 | This is to prevent the problem of one module changing the array base | |
1981 | out from under another module inadvertently. See L<perlvar/$[>. | |
1982 | ||
1983 | =item The %s function is unimplemented | |
1984 | ||
1985 | The function indicated isn't implemented on this architecture, according | |
1986 | to the probings of Configure. | |
1987 | ||
1988 | =item The crypt() function is unimplemented due to excessive paranoia. | |
1989 | ||
1990 | (F) Configure couldn't find the crypt() function on your machine, | |
1991 | probably because your vendor didn't supply it, probably because they | |
8b1a09fc | 1992 | think the U.S. Government thinks it's a secret, or at least that they |
a0d0e21e LW |
1993 | will continue to pretend that it is. And if you quote me on that, I |
1994 | will deny it. | |
1995 | ||
1996 | =item The stat preceding C<-l _> wasn't an lstat | |
1997 | ||
1998 | (F) It makes no sense to test the current stat buffer for symbolic linkhood | |
1999 | if the last stat that wrote to the stat buffer already went past | |
2000 | the symlink to get to the real file. Use an actual filename instead. | |
2001 | ||
2002 | =item times not implemented | |
2003 | ||
2004 | (F) Your version of the C library apparently doesn't do times(). I suspect | |
2005 | you're not running on Unix. | |
2006 | ||
2007 | =item Too few args to syscall | |
2008 | ||
2009 | (F) There has to be at least one argument to syscall() to specify the | |
2010 | system call to call, silly dilly. | |
2011 | ||
cb1a09d0 AD |
2012 | =item Too many ('s |
2013 | ||
2014 | =item Too many )'s | |
2015 | ||
2016 | (A) You've accidentally run your script through B<csh> instead | |
8b1a09fc | 2017 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 AD |
2018 | into Perl yourself. |
2019 | ||
a0d0e21e LW |
2020 | =item Too many args to syscall |
2021 | ||
2022 | (F) Perl only supports a maximum of 14 args to syscall(). | |
2023 | ||
2024 | =item Too many arguments for %s | |
2025 | ||
2026 | (F) The function requires fewer arguments than you specified. | |
2027 | ||
2028 | =item trailing \ in regexp | |
2029 | ||
2030 | (F) The regular expression ends with an unbackslashed backslash. Backslash | |
2031 | it. See L<perlre>. | |
2032 | ||
2033 | =item Translation pattern not terminated | |
2034 | ||
2035 | (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] | |
2036 | construct. | |
2037 | ||
2038 | =item Translation replacement not terminated | |
2039 | ||
2040 | (F) The lexer couldn't find the final delimiter of a tr/// or tr[][] | |
2041 | construct. | |
2042 | ||
2043 | =item truncate not implemented | |
2044 | ||
2045 | (F) Your machine doesn't implement a file truncation mechanism that | |
2046 | Configure knows about. | |
2047 | ||
2048 | =item Type of arg %d to %s must be %s (not %s) | |
2049 | ||
2050 | (F) This function requires the argument in that position to be of a | |
8b1a09fc | 2051 | certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be |
2052 | %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the | |
a0d0e21e LW |
2053 | {EXPR} forms as an explicit dereference. See L<perlref>. |
2054 | ||
2055 | =item umask: argument is missing initial 0 | |
2056 | ||
2057 | (W) A umask of 222 is incorrect. It should be 0222, since octal literals | |
2058 | always start with 0 in Perl, as in C. | |
2059 | ||
4633a7c4 LW |
2060 | =item Unable to create sub named "%s" |
2061 | ||
2062 | (F) You attempted to create or access a subroutine with an illegal name. | |
2063 | ||
a0d0e21e LW |
2064 | =item Unbalanced context: %d more PUSHes than POPs |
2065 | ||
2066 | (W) The exit code detected an internal inconsistency in how many execution | |
2067 | contexts were entered and left. | |
2068 | ||
2069 | =item Unbalanced saves: %d more saves than restores | |
2070 | ||
2071 | (W) The exit code detected an internal inconsistency in how many | |
2072 | values were temporarily localized. | |
2073 | ||
2074 | =item Unbalanced scopes: %d more ENTERs than LEAVEs | |
2075 | ||
2076 | (W) The exit code detected an internal inconsistency in how many blocks | |
2077 | were entered and left. | |
2078 | ||
2079 | =item Unbalanced tmps: %d more allocs than frees | |
2080 | ||
2081 | (W) The exit code detected an internal inconsistency in how many mortal | |
2082 | scalars were allocated and freed. | |
2083 | ||
2084 | =item Undefined format "%s" called | |
2085 | ||
2086 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
2087 | another package? See L<perlform>. | |
2088 | ||
2089 | =item Undefined sort subroutine "%s" called | |
2090 | ||
2091 | (F) The sort comparison routine specified doesn't seem to exist. Perhaps | |
2092 | it's in a different package? See L<perlfunc/sort>. | |
2093 | ||
2094 | =item Undefined subroutine &%s called | |
2095 | ||
2096 | (F) The subroutine indicated hasn't been defined, or if it was, it | |
2097 | has since been undefined. | |
2098 | ||
2099 | =item Undefined subroutine called | |
2100 | ||
2101 | (F) The anonymous subroutine you're trying to call hasn't been defined, | |
2102 | or if it was, it has since been undefined. | |
2103 | ||
2104 | =item Undefined subroutine in sort | |
2105 | ||
2106 | (F) The sort comparison routine specified is declared but doesn't seem to | |
2107 | have been defined yet. See L<perlfunc/sort>. | |
2108 | ||
4633a7c4 LW |
2109 | =item Undefined top format "%s" called |
2110 | ||
2111 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
2112 | another package? See L<perlform>. | |
2113 | ||
a0d0e21e LW |
2114 | =item unexec of %s into %s failed! |
2115 | ||
2116 | (F) The unexec() routine failed for some reason. See your local FSF | |
2117 | representative, who probably put it there in the first place. | |
2118 | ||
2119 | =item Unknown BYTEORDER | |
2120 | ||
2121 | (F) There are no byteswapping functions for a machine with this byte order. | |
2122 | ||
2123 | =item unmatched () in regexp | |
2124 | ||
2125 | (F) Unbackslashed parentheses must always be balanced in regular | |
2126 | expressions. If you're a vi user, the % key is valuable for finding | |
2127 | the matching paren. See L<perlre>. | |
2128 | ||
2129 | =item Unmatched right bracket | |
2130 | ||
2131 | (F) The lexer counted more closing curly brackets (braces) than opening | |
2132 | ones, so you're probably missing an opening bracket. As a general | |
2133 | rule, you'll find the missing one (so to speak) near the place you were | |
2134 | last editing. | |
2135 | ||
2136 | =item unmatched [] in regexp | |
2137 | ||
2138 | (F) The brackets around a character class must match. If you wish to | |
2139 | include a closing bracket in a character class, backslash it or put it first. | |
2140 | See L<perlre>. | |
2141 | ||
2142 | =item Unquoted string "%s" may clash with future reserved word | |
2143 | ||
2144 | (W) You used a bare word that might someday be claimed as a reserved word. | |
2145 | It's best to put such a word in quotes, or capitalize it somehow, or insert | |
2146 | an underbar into it. You might also declare it as a subroutine. | |
2147 | ||
2148 | =item Unrecognized character \%03o ignored | |
2149 | ||
2150 | (S) A garbage character was found in the input, and ignored, in case it's | |
2151 | a weird control character on an EBCDIC machine, or some such. | |
2152 | ||
2153 | =item Unrecognized signal name "%s" | |
2154 | ||
2155 | (F) You specified a signal name to the kill() function that was not recognized. | |
2156 | Say C<kill -l> in your shell to see the valid signal names on your system. | |
2157 | ||
2158 | =item Unrecognized switch: -%s | |
2159 | ||
2160 | (F) You specified an illegal option to Perl. Don't do that. | |
2161 | (If you think you didn't do that, check the #! line to see if it's | |
2162 | supplying the bad switch on your behalf.) | |
2163 | ||
2164 | =item Unsuccessful %s on filename containing newline | |
2165 | ||
2166 | (W) A file operation was attempted on a filename, and that operation | |
2167 | failed, PROBABLY because the filename contained a newline, PROBABLY | |
2168 | because you forgot to chop() or chomp() it off. See L<perlfunc/chop>. | |
2169 | ||
2170 | =item Unsupported directory function "%s" called | |
2171 | ||
2172 | (F) Your machine doesn't support opendir() and readdir(). | |
2173 | ||
2174 | =item Unsupported function %s | |
2175 | ||
2176 | (F) This machines doesn't implement the indicated function, apparently. | |
2177 | At least, Configure doesn't think so. | |
2178 | ||
2179 | =item Unsupported socket function "%s" called | |
2180 | ||
2181 | (F) Your machine doesn't support the Berkeley socket mechanism, or at | |
2182 | least that's what Configure thought. | |
2183 | ||
8b1a09fc | 2184 | =item Unterminated E<lt>E<gt> operator |
a0d0e21e LW |
2185 | |
2186 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
2187 | a term, so it's looking for the corresponding right angle bracket, and not | |
2188 | finding it. Chances are you left some needed parentheses out earlier in | |
2189 | the line, and you really meant a "less than". | |
2190 | ||
2191 | =item Use of $# is deprecated | |
2192 | ||
8b1a09fc | 2193 | (D) This was an ill-advised attempt to emulate a poorly defined B<awk> feature. |
a0d0e21e LW |
2194 | Use an explicit printf() or sprintf() instead. |
2195 | ||
2196 | =item Use of $* is deprecated | |
2197 | ||
2198 | (D) This variable magically turned on multiline pattern matching, both for | |
2199 | you and for any luckless subroutine that you happen to call. You should | |
2200 | use the new C<//m> and C<//s> modifiers now to do that without the dangerous | |
2201 | action-at-a-distance effects of C<$*>. | |
2202 | ||
748a9306 LW |
2203 | =item Use of %s in printf format not supported |
2204 | ||
2205 | (F) You attempted to use a feature of printf that is accessible only | |
2206 | from C. This usually means there's a better way to do it in Perl. | |
2207 | ||
a0d0e21e LW |
2208 | =item Use of %s is deprecated |
2209 | ||
2210 | (D) The construct indicated is no longer recommended for use, generally | |
2211 | because there's a better way to do it, and also because the old way has | |
2212 | bad side effects. | |
2213 | ||
8b1a09fc | 2214 | =item Use of bare E<lt>E<lt> to mean E<lt>E<lt>"" is deprecated |
4633a7c4 LW |
2215 | |
2216 | (D) You are now encouraged to use the explicitly quoted form if you | |
2217 | wish to use a blank line as the terminator of the here-document. | |
2218 | ||
a0d0e21e LW |
2219 | =item Use of implicit split to @_ is deprecated |
2220 | ||
2221 | (D) It makes a lot of work for the compiler when you clobber a | |
2222 | subroutine's argument list, so it's better if you assign the results of | |
2223 | a split() explicitly to an array (or list). | |
2224 | ||
2225 | =item Use of uninitialized value | |
2226 | ||
2227 | (W) An undefined value was used as if it were already defined. It was | |
2228 | interpreted as a "" or a 0, but maybe it was a mistake. To suppress this | |
2229 | warning assign an initial value to your variables. | |
2230 | ||
2231 | =item Useless use of %s in void context | |
2232 | ||
2233 | (W) You did something without a side effect in a context that does nothing | |
2234 | with the return value, such as a statement that doesn't return a value | |
2235 | from a block, or the left side of a scalar comma operator. Very often | |
2236 | this points not to stupidity on your part, but a failure of Perl to parse | |
2237 | your program the way you thought it would. For example, you'd get this | |
2238 | if you mixed up your C precedence with Python precedence and said | |
2239 | ||
2240 | $one, $two = 1, 2; | |
2241 | ||
2242 | when you meant to say | |
2243 | ||
2244 | ($one, $two) = (1, 2); | |
2245 | ||
748a9306 LW |
2246 | Another common error is to use ordinary parentheses to construct a list |
2247 | reference when you should be using square or curly brackets, for | |
2248 | example, if you say | |
2249 | ||
2250 | $array = (1,2); | |
2251 | ||
2252 | when you should have said | |
2253 | ||
2254 | $array = [1,2]; | |
2255 | ||
2256 | The square brackets explicitly turn a list value into a scalar value, | |
2257 | while parentheses do not. So when a parenthesized list is evaluated in | |
2258 | a scalar context, the comma is treated like C's comma operator, which | |
2259 | throws away the left argument, which is not what you want. See | |
2260 | L<perlref> for more on this. | |
2261 | ||
4633a7c4 LW |
2262 | =item Variable "%s" is not exported |
2263 | ||
2264 | (F) While "use strict" in effect, you referred to a global variable | |
2265 | that you apparently thought was imported from another module, because | |
2266 | something else of the same name (usually a subroutine) is exported | |
2267 | by that module. It usually means you put the wrong funny character | |
2268 | on the front of your variable. | |
2269 | ||
cb1a09d0 AD |
2270 | =item Variable syntax. |
2271 | ||
2272 | (A) You've accidentally run your script through B<csh> instead | |
8b1a09fc | 2273 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 AD |
2274 | into Perl yourself. |
2275 | ||
a0d0e21e LW |
2276 | =item Warning: unable to close filehandle %s properly. |
2277 | ||
8b1a09fc | 2278 | (S) The implicit close() done by an open() got an error indication on the |
2ba9eb46 | 2279 | close(). This usually indicates your filesystem ran out of disk space. |
a0d0e21e LW |
2280 | |
2281 | =item Warning: Use of "%s" without parens is ambiguous | |
2282 | ||
2283 | (S) You wrote a unary operator followed by something that looks like a | |
2284 | binary operator that could also have been interpreted as a term or | |
2285 | unary operator. For instance, if you know that the rand function | |
2286 | has a default argument of 1.0, and you write | |
2287 | ||
2288 | rand + 5; | |
2289 | ||
2290 | you may THINK you wrote the same thing as | |
2291 | ||
2292 | rand() + 5; | |
2293 | ||
2294 | but in actual fact, you got | |
2295 | ||
2296 | rand(+5); | |
2297 | ||
2298 | So put in parens to say what you really mean. | |
2299 | ||
2300 | =item Write on closed filehandle | |
2301 | ||
2302 | (W) The filehandle you're writing to got itself closed sometime before now. | |
2303 | Check your logic flow. | |
2304 | ||
2305 | =item X outside of string | |
2306 | ||
2307 | (F) You had a pack template that specified a relative position before | |
2308 | the beginning of the string being unpacked. See L<perlfunc/pack>. | |
2309 | ||
2310 | =item x outside of string | |
2311 | ||
2312 | (F) You had a pack template that specified a relative position after | |
2313 | the end of the string being unpacked. See L<perlfunc/pack>. | |
2314 | ||
2315 | =item Xsub "%s" called in sort | |
2316 | ||
2317 | (F) The use of an external subroutine as a sort comparison is not yet supported. | |
2318 | ||
2319 | =item Xsub called in sort | |
2320 | ||
2321 | (F) The use of an external subroutine as a sort comparison is not yet supported. | |
2322 | ||
2323 | =item You can't use C<-l> on a filehandle | |
2324 | ||
2325 | (F) A filehandle represents an opened file, and when you opened the file it | |
2326 | already went past any symlink you are presumably trying to look for. | |
2327 | Use a filename instead. | |
2328 | ||
2329 | =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! | |
2330 | ||
2331 | (F) And you probably never will, since you probably don't have the | |
2332 | sources to your kernel, and your vendor probably doesn't give a rip | |
2333 | about what you want. Your best bet is to use the wrapsuid script in | |
2334 | the eg directory to put a setuid C wrapper around your script. | |
2335 | ||
2336 | =item You need to quote "%s" | |
2337 | ||
2338 | (W) You assigned a bareword as a signal handler name. Unfortunately, you | |
2339 | already have a subroutine of that name declared, which means that Perl 5 | |
2340 | will try to call the subroutine when the assignment is executed, which is | |
2341 | probably not what you want. (If it IS what you want, put an & in front.) | |
2342 | ||
2343 | =item [gs]etsockopt() on closed fd | |
2344 | ||
2345 | (W) You tried to get or set a socket option on a closed socket. | |
2346 | Did you forget to check the return value of your socket() call? | |
2347 | See L<perlfunc/getsockopt>. | |
2348 | ||
2349 | =item \1 better written as $1 | |
2350 | ||
2351 | (W) Outside of patterns, backreferences live on as variables. The use | |
2352 | of backslashes is grandfathered on the righthand side of a | |
2353 | substitution, but stylistically it's better to use the variable form | |
2354 | because other Perl programmers will expect it, and it works better | |
2355 | if there are more than 9 backreferences. | |
2356 | ||
8b1a09fc | 2357 | =item '|' and 'E<lt>' may not both be specified on command line |
748a9306 LW |
2358 | |
2359 | (F) An error peculiar to VMS. Perl does its own command line redirection, and | |
2360 | found that STDIN was a pipe, and that you also tried to redirect STDIN using | |
8b1a09fc | 2361 | 'E<lt>'. Only one STDIN stream to a customer, please. |
748a9306 | 2362 | |
8b1a09fc | 2363 | =item '|' and 'E<gt>' may not both be specified on command line |
748a9306 LW |
2364 | |
2365 | (F) An error peculiar to VMS. Perl does its own command line redirection, and | |
2366 | thinks you tried to redirect stdout both to a file and into a pipe to another | |
2367 | command. You need to choose one or the other, though nothing's stopping you | |
2368 | from piping into a program or Perl script which 'splits' output into two | |
2369 | streams, such as | |
2370 | ||
2371 | open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!"; | |
2372 | while (<STDIN>) { | |
2373 | print; | |
2374 | print OUT; | |
2375 | } | |
2376 | close OUT; | |
2377 | ||
33c8a3fe IZ |
2378 | =item Got an error from DosAllocMem: |
2379 | ||
2380 | (P) An error peculiar to OS/2. Most probably you use an obsolete version | |
2381 | of perl, and should not happen anyway. | |
2382 | ||
2383 | =item Malformed PERLLIB_PREFIX | |
2384 | ||
2385 | (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form | |
2386 | ||
2387 | prefix1;prefix2 | |
2388 | ||
2389 | or | |
2390 | ||
2391 | prefix1 prefix2 | |
2392 | ||
2393 | with non-empty prefix1 and prefix2. If C<prefix1> is indeed a prefix of | |
2394 | a builtin library search path, prefix2 is substituted. The error may appear | |
2395 | if components are not found, or are too long. See L<perlos2/"PERLLIB_PREFIX">. | |
2396 | ||
2397 | =item PERL_SH_DIR too long | |
2398 | ||
2399 | (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the | |
2400 | C<sh>-shell in. See L<perlos2/"PERL_SH_DIR">. | |
2401 | ||
2402 | =item Process terminated by SIG%s | |
2403 | ||
2404 | (W) This is a standard message issued by OS/2 applications, while *nix | |
2405 | applications die in silence. It is considered a feature of the OS/2 | |
2406 | port. One can easily disable this by appropriate sighandlers, see | |
2407 | L<perlipc/"Signals">. See L<perlos2/"Process terminated by SIGTERM/SIGINT">. | |
2408 | ||
a0d0e21e LW |
2409 | =back |
2410 |