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