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1=head1 NAME
2
3perldiag - various Perl diagnostics
4
5=head1 DESCRIPTION
6
7These messages are classified as follows (listed in increasing order of
8desperation):
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).
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18Optional warnings are enabled by using the B<-w> switch. Warnings may
19be captured by setting C<$^Q> to a reference to a routine that will be
20called on each warning instead of printing it. See L<perlvar>.
21Trappable errors may be trapped using the eval operator. See
22L<perlfunc/eval>.
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23
24Some of these messages are generic. Spots that vary are denoted with a %s,
25just as in a printf format. Note that some message start with a %s!
26The 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
33to try to declare one with a package qualifier on the front. Use local()
34if you want to localize a package variable.
35
36=item "no" not allowed in expression
37
38(F) The "no" keyword is recognized and executed at compile time, and returns
39no useful value. See L<perlmod>.
40
41=item "use" not allowed in expression
42
43(F) The "use" keyword is recognized and executed at compile time, and returns
44no useful value. See L<perlmod>.
45
46=item % may only be used in unpack
47
48(F) You can't pack a string by supplying a checksum, since the
49checksumming process loses information, and you can't go the other
50way. See L<perlfunc/unpack>.
51
52=item %s (...) interpreted as function
53
54(W) You've run afoul of the rule that says that any list operator followed
55by parentheses turns into a function, with all the list operators arguments
56found inside the parens. See L<perlop/Terms and List Operators (Leftward)>.
57
58=item %s argument is not a HASH element
59
60(F) The argument to delete() or exists() must be a hash element, such as
61
62 $foo{$bar}
63 $ref->[12]->{"susie"}
64
65=item %s did not return a true value
66
67(F) A required (or used) file must return a true value to indicate that
68it compiled correctly and ran its initialization code correctly. It's
69traditional to end such a file with a "1;", though any true value would
70do. See L<perlfunc/require>.
71
72=item %s found where operator expected
73
74(S) The Perl lexer knows whether to expect a term or an operator. If it
75sees what it knows to be a term when it was expecting to see an operator,
76it gives you this warning. Usually it indicates that an operator or
77delimiter was omitted, such as a semicolon.
78
79=item %s had compilation errors.
80
81(F) The final summary message when a C<perl -c> fails.
82
83=item %s has too many errors.
84
85(F) The parser has given up trying to parse the program after 10 errors.
86Further error messages would likely be uninformative.
87
88=item %s matches null string many times
89
90(W) The pattern you've specified would be an infinite loop if the
91regular expression engine didn't specifically check for that. See L<perlre>.
92
93=item %s never introduced
94
95(S) The symbol in question was declared but somehow went out of scope
96before it could possibly have been used.
97
98=item %s syntax OK
99
100(F) The final summary message when a C<perl -c> succeeds.
101
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102=item %s: Command not found.
103
104(A) You've accidentally run your script through B<csh> instead
105of Perl. Check the <#!> line, or manually feed your script
106into Perl yourself.
107
108=item %s: Expression syntax.
109
110(A) You've accidentally run your script through B<csh> instead
111of Perl. Check the <#!> line, or manually feed your script
112into Perl yourself.
113
114=item %s: Undefined variable.
115
116(A) You've accidentally run your script through B<csh> instead
117of Perl. Check the <#!> line, or manually feed your script
118into Perl yourself.
119
120=item %s: not found
121
122(A) You've accidentally run your script through the Bourne shell
123instead of Perl. Check the <#!> line, or manually feed your script
124into Perl yourself.
125
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126=item B<-P> not allowed for setuid/setgid script
127
128(F) The script would have to be opened by the C preprocessor by name,
129which provides a race condition that breaks security.
130
131=item C<-T> and C<-B> not implemented on filehandles
132
133(F) Perl can't peek at the stdio buffer of filehandles when it doesn't
134know about your kind of stdio. You'll have to use a filename instead.
135
136=item ?+* follows nothing in regexp
137
138(F) You started a regular expression with a quantifier. Backslash it
139if you meant it literally. See L<perlre>.
140
141=item @ outside of string
142
143(F) You had a pack template that specified an absolution position outside
144the string being unpacked. See L<perlfunc/pack>.
145
146=item accept() on closed fd
147
148(W) You tried to do an accept on a closed socket. Did you forget to check
149the return value of your socket() call? See L<perlfunc/accept>.
150
151=item Allocation too large: %lx
152
153(F) You can't allocate more than 64K on an MSDOS machine.
154
155=item Arg too short for msgsnd
156
157(F) msgsnd() requires a string at least as long as sizeof(long).
158
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159=item Ambiguous use of %s resolved as %s
160
161(W)(S) You said something that may not be interpreted the way
162you thought. Normally it's pretty easy to disambiguate it by supplying
163a missing quote, operator, paren pair or declaration.
164
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165=item Args must match #! line
166
167(F) The setuid emulator requires that the arguments Perl was invoked
168with match the arguments specified on the #! line.
169
170=item Argument "%s" isn't numeric
171
172(W) The indicated string was fed as an argument to an operator that
173expected a numeric value instead. If you're fortunate the message
174will identify which operator was so unfortunate.
175
176=item Array @%s missing the @ in argument %d of %s()
177
178(D) Really old Perl let you omit the @ on array names in some spots. This
179is now heavily deprecated.
180
181=item assertion botched: %s
182
183(P) The malloc package that comes with Perl had an internal failure.
184
185=item Assertion failed: file "%s"
186
187(P) A general assertion failed. The file in question must be examined.
188
189=item Assignment to both a list and a scalar
190
191(F) If you assign to a conditional operator, the 2nd and 3rd arguments
192must either both be scalars or both be lists. Otherwise Perl won't
193know which context to supply to the right side.
194
195=item Attempt to free non-arena SV: 0x%lx
196
197(P) All SV objects are supposed to be allocated from arenas that will
198be garbage collected on exit. An SV was discovered to be outside any
199of those arenas.
200
201=item Attempt to free temp prematurely
202
203(W) Mortalized values are supposed to be freed by the free_tmps()
204routine. This indicates that something else is freeing the SV before
205the free_tmps() routine gets a chance, which means that the free_tmps()
206routine will be freeing an unreferenced scalar when it does try to free
207it.
208
209=item Attempt to free unreferenced glob pointers
210
211(P) The reference counts got screwed up on symbol aliases.
212
213=item Attempt to free unreferenced scalar
214
215(W) Perl went to decrement the reference count of a scalar to see if it
216would go to 0, and discovered that it had already gone to 0 earlier,
217and should have been freed, and in fact, probably was freed. This
218could indicate that SvREFCNT_dec() was called too many times, or that
219SvREFCNT_inc() was called too few times, or that the SV was mortalized
220when it shouldn't have been, or that memory has been corrupted.
221
222=item Bad arg length for %s, is %d, should be %d
223
224(F) You passed a buffer of the wrong size to one of msgctl(), semctl() or
225shmctl(). In C parlance, the correct sized are, respectively,
226S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)> and
227S<sizeof(struct shmid_ds *)>.
228
229=item Bad associative array
230
231(P) One of the internal hash routines was passed a null HV pointer.
232
233=item Bad filehandle: %s
234
235(F) A symbol was passed to something wanting a filehandle, but the symbol
236has no filehandle associated with it. Perhaps you didn't do an open(), or
237did it in another package.
238
239=item Bad free() ignored
240
241(S) An internal routine called free() on something that had never been
242malloc()ed in the first place.
243
244=item Bad name after %s::
245
246(F) You started to name a symbol by using a package prefix, and then didn't
247finish the symbol. In particular, you can't interpolate outside of quotes,
248so
249
250 $var = 'myvar';
251 $sym = mypack::$var;
252
253is not the same as
254
255 $var = 'myvar';
256 $sym = "mypack::$var";
257
258=item Bad symbol for array
259
260(P) An internal request asked to add an array entry to something that
261wasn't a symbol table entry.
262
263=item Bad symbol for filehandle
264
265(P) An internal request asked to add a filehandle entry to something that
266wasn't a symbol table entry.
267
268=item Bad symbol for hash
269
270(P) An internal request asked to add a hash entry to something that
271wasn't a symbol table entry.
272
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273=item Badly places ()'s
274
275(A) You've accidentally run your script through B<csh> instead
276of Perl. Check the <#!> line, or manually feed your script
277into Perl yourself.
278
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279=item BEGIN failed--compilation aborted
280
281(F) An untrapped exception was raised while executing a BEGIN subroutine.
282Compilation stops immediately and the interpreter is exited.
283
284=item bind() on closed fd
285
286(W) You tried to do a bind on a closed socket. Did you forget to check
287the return value of your socket() call? See L<perlfunc/bind>.
288
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289=item Bizarre copy of %s in %s
290
291(P) Perl detected an attempt to copy an internal value that is not copiable.
292
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293=item Callback called exit
294
295(F) A subroutine invoked from an external package via perl_call_sv()
296exited by calling exit.
297
298=item Can't "last" outside a block
299
300(F) A "last" statement was executed to break out of the current block,
301except that there's this itty bitty problem called there isn't a
302current block. Note that an "if" or "else" block doesn't count as a
303"loopish" block. You can usually double the curlies to get the same
304effect though, since the inner curlies will be considered a block
305that loops once. See L<perlfunc/last>.
306
307=item Can't "next" outside a block
308
309(F) A "next" statement was executed to reiterate the current block, but
310there isn't a current block. Note that an "if" or "else" block doesn't
311count as a "loopish" block. You can usually double the curlies to get
312the same effect though, since the inner curlies will be considered a block
313that loops once. See L<perlfunc/last>.
314
315=item Can't "redo" outside a block
316
317(F) A "redo" statement was executed to restart the current block, but
318there isn't a current block. Note that an "if" or "else" block doesn't
319count as a "loopish" block. You can usually double the curlies to get
320the same effect though, since the inner curlies will be considered a block
321that loops once. See L<perlfunc/last>.
322
323=item Can't bless non-reference value
324
325(F) Only hard references may be blessed. This is how Perl "enforces"
326encapsulation of objects. See L<perlobj>.
327
328=item Can't break at that line
329
330(S) A warning intended for while running within the debugger, indicating
331the line number specified wasn't the location of a statement that could
332be stopped at.
333
334=item Can't call method "%s" in empty package "%s"
335
336(F) You called a method correctly, and it correctly indicated a package
337functioning as a class, but that package doesn't have ANYTHING defined
338in it, let alone methods. See L<perlobj>.
339
340=item Can't call method "%s" on unblessed reference
341
342(F) A method call must know what package it's supposed to run in. It
343ordinarily finds this out from the object reference you supply, but
344you didn't supply an object reference in this case. A reference isn't
345an object reference until it has been blessed. See L<perlobj>.
346
347=item Can't call method "%s" without a package or object reference
348
349(F) You used the syntax of a method call, but the slot filled by the
350object reference or package name contains an expression that returns
351neither an object reference nor a package name. (Perhaps it's null?)
352Something like this will reproduce the error:
353
354 $BADREF = undef;
355 process $BADREF 1,2,3;
356 $BADREF->process(1,2,3);
357
358=item Can't chdir to %s
359
360(F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory
361that you can chdir to, possibly because it doesn't exist.
362
363=item Can't coerce %s to integer in %s
364
365(F) Certain types of SVs, in particular real symbol table entries
366(type GLOB), can't be forced to stop being what they are. So you can't
367say things like:
368
369 *foo += 1;
370
371You CAN say
372
373 $foo = *foo;
374 $foo += 1;
375
376but then $foo no longer contains a glob.
377
378=item Can't coerce %s to number in %s
379
380(F) Certain types of SVs, in particular real symbol table entries
381(type GLOB), can't be forced to stop being what they are.
382
383=item Can't coerce %s to string in %s
384
385(F) Certain types of SVs, in particular real symbol table entries
386(type GLOB), can't be forced to stop being what they are.
387
388=item Can't create pipe mailbox
389
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390(P) An error peculiar to VMS. The process is suffering from exhausted quotas
391or other plumbing problems.
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392
393=item Can't declare %s in my
394
395(F) Only scalar, array and hash variables may be declared as lexical variables.
396They must have ordinary identifiers as names.
397
398=item Can't do inplace edit on %s: %s
399
400(S) The creation of the new file failed for the indicated reason.
401
402=item Can't do inplace edit without backup
403
404(F) You're on a system such as MSDOS that gets confused if you try reading
405from a deleted (but still opened) file. You have to say B<-i>C<.bak>, or some
406such.
407
408=item Can't do inplace edit: %s > 14 characters
409
410(S) There isn't enough room in the filename to make a backup name for the file.
411
412=item Can't do inplace edit: %s is not a regular file
413
414(S) You tried to use the B<-i> switch on a special file, such as a file in
415/dev, or a FIFO. The file was ignored.
416
417=item Can't do setegid!
418
419(P) The setegid() call failed for some reason in the setuid emulator
420of suidperl.
421
422=item Can't do seteuid!
423
424(P) The setuid emulator of suidperl failed for some reason.
425
426=item Can't do setuid
427
428(F) This typically means that ordinary perl tried to exec suidperl to
429do setuid emulation, but couldn't exec it. It looks for a name of the
430form sperl5.000 in the same directory that the perl executable resides
431under the name perl5.000, typically /usr/local/bin on Unix machines.
432If the file is there, check the execute permissions. If it isn't, ask
433your sysadmin why he and/or she removed it.
434
435=item Can't do waitpid with flags
436
437(F) This machine doesn't have either waitpid() or wait4(), so only waitpid()
438without flags is emulated.
439
440=item Can't do {n,m} with n > m
441
442(F) Minima must be less than or equal to maxima. If you really want
443your regexp to match something 0 times, just put {0}. See L<perlre>.
444
445=item Can't emulate -%s on #! line
446
447(F) The #! line specifies a switch that doesn't make sense at this point.
448For example, it'd be kind of silly to put a B<-x> on the #! line.
449
450=item Can't exec "%s": %s
451
452(W) An system(), exec() or piped open call could not execute the named
453program for the indicated reason. Typical reasons include: the permissions
454were wrong on the file, the file wasn't found in C<$ENV{PATH}>, the
455executable in question was compiled for another architecture, or the
456#! line in a script points to an interpreter that can't be run for
457similar reasons. (Or maybe your system doesn't support #! at all.)
458
459=item Can't exec %s
460
461(F) Perl was trying to execute the indicated program for you because that's
462what the #! line said. If that's not what you wanted, you may need to
463mention "perl" on the #! line somewhere.
464
465=item Can't execute %s
466
467(F) You used the B<-S> switch, but the script to execute could not be found
468in the PATH, or at least not with the correct permissions.
469
470=item Can't find label %s
471
472(F) You said to goto a label that isn't mentioned anywhere that it's possible
473for us to go to. See L<perlfunc/goto>.
474
475=item Can't find string terminator %s anywhere before EOF
476
477(F) Perl strings can stretch over multiple lines. This message means that
478the closing delimiter was omitted. Since bracketed quotes count nesting
479levels, the following is missing its final parenthesis:
480
481 print q(The character '(' starts a side comment.)
482
483=item Can't fork
484
485(F) A fatal error occurred while trying to fork while opening a pipeline.
486
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487=item Can't get filespec - stale stat buffer?
488
489(S) A warning peculiar to VMS. This arises because of the difference between
490access checks under VMS and under the Unix model Perl assumes. Under VMS,
491access checks are done by filename, rather than by bits in the stat buffer, so
492that ACLs and other protections can be taken into account. Unfortunately, Perl
493assumes that the stat buffer contains all the necessary information, and passes
494it, instead of the filespec, to the access checking routine. It will try to
495retrieve the filespec using the device name and FID present in the stat buffer,
496but this works only if you haven't made a subsequent call to the CRTL stat()
497routine, since the device name is overwritten with each call. If this warning
498appears, the name lookup failed, and the access checking routine gave up and
499returned FALSE, just to be conservative. (Note: The access checking routine
500knows about the Perl C<stat> operator and file tests, so you shouldn't ever
501see this warning in response to a Perl command; it arises only if some internal
502code takes stat buffers lightly.)
503
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504=item Can't get pipe mailbox device name
505
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506(P) An error peculiar to VMS. After creating a mailbox to act as a pipe, Perl
507can't retrieve its name for later use.
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508
509=item Can't get SYSGEN parameter value for MAXBUF
510
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511(P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
512mailbox buffers to be, and didn't get an answer.
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513
514=item Can't goto subroutine outside a subroutine
515
516(F) The deeply magical "goto subroutine" call can only replace one subroutine
517call for another. It can't manufacture one out of whole cloth. In general
518you should only be calling it out of an AUTOLOAD routine anyway. See
519L<perlfunc/goto>.
520
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521=item Can't localize a reference
522
523(F) You said something like C<local $$ref>, which is not allowed because
524the compiler can't determine whether $ref will end up pointing to anything
525with a symbol table entry, and a symbol table entry is necessary to
526do a local.
527
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528=item Can't localize lexical variable %s
529
530(F) You used local on a variable name that was previous declared as a
531lexical variable using "my". This is not allowed. If you want to
532localize a package variable of the same name, qualify it with the
533package name.
534
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535=item Can't locate %s in @INC
536
537(F) You said to do (or require, or use) a file that couldn't be found
538in any of the libraries mentioned in @INC. Perhaps you need to set
539the PERL5LIB environment variable to say where the extra library is,
540or maybe the script needs to add the library name to @INC. Or maybe
541you just misspelled the name of the file. See L<perlfunc/require>.
542
543=item Can't locate object method "%s" via package "%s"
544
545(F) You called a method correctly, and it correctly indicated a package
546functioning as a class, but that package doesn't define that particular
547method, nor does any of it's base classes. See L<perlobj>.
548
549=item Can't locate package %s for @%s::ISA
550
551(W) The @ISA array contained the name of another package that doesn't seem
552to exist.
553
554=item Can't mktemp()
555
556(F) The mktemp() routine failed for some reason while trying to process
557a B<-e> switch. Maybe your /tmp partition is full, or clobbered.
558
559=item Can't modify %s in %s
560
561(F) You aren't allowed to assign to the item indicated, or otherwise try to
562change it, such as with an autoincrement.
563
564=item Can't modify non-existent substring
565
566(P) The internal routine that does assignment to a substr() was handed
567a NULL.
568
569=item Can't msgrcv to readonly var
570
571(F) The target of a msgrcv must be modifiable in order to be used as a receive
572buffer.
573
574=item Can't open %s: %s
575
576(S) An inplace edit couldn't open the original file for the indicated reason.
577Usually this is because you don't have read permission for the file.
578
579=item Can't open bidirectional pipe
580
581(W) You tried to say C<open(CMD, "|cmd|")>, which is not supported. You can
582try any of several modules in the Perl library to do this, such as
583"open2.pl". Alternately, direct the pipe's output to a file using ">",
584and then read it in under a different file handle.
585
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586=item Can't open error file %s as stderr
587
588(F) An error peculiar to VMS. Perl does its own command line redirection, and
589couldn't open the file specified after '2>' or '2>>' on the command line for
590writing.
591
592=item Can't open input file %s as stdin
593
594(F) An error peculiar to VMS. Perl does its own command line redirection, and
595couldn't open the file specified after '<' on the command line for reading.
596
597=item Can't open output file %s as stdout
598
599(F) An error peculiar to VMS. Perl does its own command line redirection, and
600couldn't open the file specified after '>' or '>>' on the command line for
601writing.
602
603=item Can't open output pipe (name: %s)
604
605(P) An error peculiar to VMS. Perl does its own command line redirection, and
606couldn't open the pipe into which to send data destined for stdout.
607
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608=item Can't open perl script "%s": %s
609
610(F) The script you specified can't be opened for the indicated reason.
611
612=item Can't rename %s to %s: %s, skipping file
613
614(S) The rename done by the B<-i> switch failed for some reason, probably because
615you don't have write permission to the directory.
616
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617=item Can't reopen input pipe (name: %s) in binary mode
618
619(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried to
620reopen it to accept binary data. Alas, it failed.
621
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622=item Can't reswap uid and euid
623
624(P) The setreuid() call failed for some reason in the setuid emulator
625of suidperl.
626
627=item Can't return outside a subroutine
628
629(F) The return statement was executed in mainline code, that is, where
630there was no subroutine call to return out of. See L<perlsub>.
631
632=item Can't stat script "%s"
633
634(P) For some reason you can't fstat() the script even though you have
635it open already. Bizarre.
636
637=item Can't swap uid and euid
638
639(P) The setreuid() call failed for some reason in the setuid emulator
640of suidperl.
641
642=item Can't take log of %g
643
644(F) Logarithms are only defined on positive real numbers.
645
646=item Can't take sqrt of %g
647
648(F) For ordinary real numbers, you can't take the square root of a
649negative number. There's a Complex package available for Perl, though,
650if you really want to do that.
651
652=item Can't undef active subroutine
653
654(F) You can't undefine a routine that's currently running. You can,
655however, redefine it while it's running, and you can even undef the
656redefined subroutine while the old routine is running. Go figure.
657
658=item Can't unshift
659
660(F) You tried to unshift an "unreal" array that can't be unshifted, such
661as the main Perl stack.
662
663=item Can't upgrade that kind of scalar
664
665(P) The internal sv_upgrade routine adds "members" to an SV, making
666it into a more specialized kind of SV. The top several SV types are
667so specialized, however, that they cannot be interconverted. This
668message indicates that such a conversion was attempted.
669
670=item Can't upgrade to undef
671
672(P) The undefined SV is the bottom of the totem pole, in the scheme
673of upgradability. Upgrading to undef indicates an error in the
674code calling sv_upgrade.
675
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LW
676=item Can't use %s for loop variable
677
678(F) Only a simple scalar variable may be used as a loop variable on a foreach.
679
680=item Can't use %s ref as %s ref
681
682(F) You've mixed up your reference types. You have to dereference a
683reference of the type needed. You can use the ref() function to
684test the type of the reference, if need be.
685
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LW
686=item Can't use \1 to mean $1 in expression
687
688(W) In an ordinary expression, backslash is a unary operator that creates
689a reference to its argument. The use of backslash to indicate a backreference
690to a matched substring is only valid as part of a regular expression pattern.
691Trying to do this in ordinary Perl code produces a value that prints
692out looking like SCALAR(0xdecaf). Use the $1 form instead.
693
694=item Can't use string ("%s") as %s ref while "strict refs" in use
a0d0e21e
LW
695
696(F) Only hard references are allowed by "strict refs". Symbolic references
697are disallowed. See L<perlref>.
698
699=item Can't use an undefined value as %s reference
700
701(F) A value used as either a hard reference or a symbolic reference must
702be a defined value. This helps to de-lurk some insidious errors.
703
704=item Can't use delimiter brackets within expression
705
706(F) The ${name} construct is for disambiguating identifiers in strings, not
707in ordinary code.
708
709=item Can't use global %s in "my"
710
711(F) You tried to declare a magical variable as a lexical variable. This is
712not allowed, because the magic can only be tied to one location (namely
713the global variable) and it would be incredibly confusing to have
714variables in your program that looked like magical variables but
715weren't.
716
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717=item Can't use subscript on %s
718
719(F) The compiler tried to interpret a bracketed expression as a
720subscript. But to the left of the brackets was an expression that
721didn't look like an array reference, or anything else subscriptable.
722
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723=item Can't write to temp file for B<-e>: %s
724
725(F) The write routine failed for some reason while trying to process
726a B<-e> switch. Maybe your /tmp partition is full, or clobbered.
727
728=item Can't x= to readonly value
729
730(F) You tried to repeat a constant value (often the undefined value) with
731an assignment operator, which implies modifying the value itself.
732Perhaps you need to copy the value to a temporary, and repeat that.
733
734=item Cannot open temporary file
735
736(F) The create routine failed for some reaon while trying to process
737a B<-e> switch. Maybe your /tmp partition is full, or clobbered.
738
739=item chmod: mode argument is missing initial 0
740
741(W) A novice will sometimes say
742
743 chmod 777, $filename
744
745not realizing that 777 will be interpreted as a decimal number, equivalent
746to 01411. Octal constants are introduced with a leading 0 in Perl, as in C.
747
748=item Close on unopened file <%s>
749
750(W) You tried to close a filehandle that was never opened.
751
752=item connect() on closed fd
753
754(W) You tried to do a connect on a closed socket. Did you forget to check
755the return value of your socket() call? See L<perlfunc/connect>.
756
757=item Corrupt malloc ptr 0x%lx at 0x%lx
758
759(P) The malloc package that comes with Perl had an internal failure.
760
761=item corrupted regexp pointers
762
763(P) The regular expression engine got confused by what the regular
764expression compiler gave it.
765
766=item corrupted regexp program
767
768(P) The regular expression engine got passed a regexp program without
769a valid magic number.
770
771=item Deep recursion on subroutine "%s"
772
773(W) This subroutine has called itself (directly or indirectly) 100
774times than it has returned. This probably indicates an infinite
775recursion, unless you're writing strange benchmark programs, in which
776case it indicates something else.
777
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LW
778=item Did you mean &%s instead?
779
780(W) You probably referred to an imported subroutine &FOO as $FOO or some such.
781
748a9306 782=item Did you mean $ or @ instead of %?
a0d0e21e 783
748a9306
LW
784(W) You probably said %hash{$key} when you meant $hash{$key} or @hash{@keys}.
785On the other hand, maybe you just meant %hash and got carried away.
786
787=item Do you need to predeclare %s?
788
789(S) This is an educated guess made in conjunction with the message "%s
790found where operator expected". It often means a subroutine or module
791name is being referenced that hasn't been declared yet. This may be
792because of ordering problems in your file, or because of a missing
793"sub", "package", "require", or "use" statement. If you're
794referencing something that isn't defined yet, you don't actually have
795to define the subroutine or package before the current location. You
796can use an empty "sub foo;" or "package FOO;" to enter a "forward"
797declaration.
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LW
798
799=item Don't know how to handle magic of type '%s'
800
801(P) The internal handling of magical variables has been cursed.
802
803=item do_study: out of memory
804
805(P) This should have been caught by safemalloc() instead.
806
807=item Duplicate free() ignored
808
809(S) An internal routine called free() on something that had already
810been freed.
811
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LW
812=item elseif should be elsif
813
814(S) There is no keyword "elseif" in Perl because Larry thinks it's
815ugly. Your code will be interpreted as an attempt to call a method
816named "elseif" for the class returned by the following block. This is
817unlikely to be what you want.
818
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819=item END failed--cleanup aborted
820
821(F) An untrapped exception was raised while executing an END subroutine.
822The interpreter is immediately exited.
823
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824=item Error converting file specification %s
825
826(F) An error peculiar to VMS. Since Perl may have to deal with file
827specifications in either VMS or Unix syntax, it converts them to a
828single form when it must operate on them directly. Either you've
829passed an invalid file specification to Perl, or you've found a
830case the conversion routines don't handle. Drat.
831
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LW
832=item Execution of %s aborted due to compilation errors.
833
834(F) The final summary message when a Perl compilation fails.
835
836=item Exiting eval via %s
837
838(W) You are exiting an eval by unconventional means, such as a
839a goto, or a loop control statement.
840
841=item Exiting subroutine via %s
842
843(W) You are exiting a subroutine by unconventional means, such as a
844a goto, or a loop control statement.
845
846=item Exiting substitution via %s
847
848(W) You are exiting a substitution by unconventional means, such as a
849a return, a goto, or a loop control statement.
850
748a9306 851=item Fatal VMS error at %s, line %d
a0d0e21e 852
748a9306
LW
853(P) An error peculiar to VMS. Something untoward happened in a VMS system
854service or RTL routine; Perl's exit status should provide more details. The
855filename in "at %s" and the line number in "line %d" tell you which section of
856the Perl source code is distressed.
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LW
857
858=item fcntl is not implemented
859
860(F) Your machine apparently doesn't implement fcntl(). What is this, a
861PDP-11 or something?
862
863=item Filehandle %s never opened
864
865(W) An I/O operation was attempted on a filehandle that was never initialized.
866You need to do an open() or a socket() call, or call a constructor from
867the FileHandle package.
868
869=item Filehandle %s opened only for input
870
871(W) You tried to write on a read-only filehandle. If you
872intended it to be a read-write filehandle, you needed to open it with
873"+<" or "+>" or "+>>" instead of with "<" or nothing. If you only
874intended to write the file, use ">" or ">>". See L<perlfunc/open>.
875
876=item Filehandle only opened for input
877
878(W) You tried to write on a read-only filehandle. If you
879intended it to be a read-write filehandle, you needed to open it with
880"+<" or "+>" or "+>>" instead of with "<" or nothing. If you only
881intended to write the file, use ">" or ">>". See L<perlfunc/open>.
882
883=item Final $ should be \$ or $name
884
885(F) You must now decide whether the final $ in a string was meant to be
886a literal dollar sign, or was meant to introduce a variable name
887that happens to be missing. So you have to put either the backslash or
888the name.
889
890=item Final @ should be \@ or @name
891
892(F) You must now decide whether the final @ in a string was meant to be
893a literal "at" sign, or was meant to introduce a variable name
894that happens to be missing. So you have to put either the backslash or
895the name.
896
897=item Format %s redefined
898
899(W) You redefined a format. To suppress this warning, say
900
901 {
902 local $^W = 0;
903 eval "format NAME =...";
904 }
905
906=item Format not terminated
907
908(F) A format must be terminated by a line with a solitary dot. Perl got
909to the end of your file without finding such a line.
910
911=item Found = in conditional, should be ==
912
913(W) You said
914
915 if ($foo = 123)
916
917when you meant
918
919 if ($foo == 123)
920
921(or something like that).
922
923=item gdbm store returned %d, errno %d, key "%s"
924
925(S) A warning from the GDBM_File extension that a store failed.
926
927=item gethostent not implemented
928
929(F) Your C library apparently doesn't implement gethostent(), probably
930because if it did, it'd feel morally obligated to return every hostname
931on the Internet.
932
933=item get{sock,peer}name() on closed fd
934
935(W) You tried to get a socket or peer socket name on a closed socket.
936Did you forget to check the return value of your socket() call?
937
748a9306
LW
938=item getpwnam returned invalid UIC %#o for user "%s"
939
940(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
941C<getpwnam> operator returned an invalid UIC.
942
943
a0d0e21e
LW
944=item Glob not terminated
945
946(F) The lexer saw a left angle bracket in a place where it was expecting
947a term, so it's looking for the corresponding right angle bracket, and not
948finding it. Chances are you left some needed parentheses out earlier in
949the line, and you really meant a "less than".
950
951=item Global symbol "%s" requires explicit package name
952
953(F) You've said "use strict vars", which indicates that all variables must
954either be lexically scoped (using "my"), or explicitly qualified to
955say which package the global variable is in (using "::").
956
957=item goto must have label
958
959(F) Unlike with "next" or "last", you're not allowed to goto an
960unspecified destination. See L<perlfunc/goto>.
961
962=item Had to create %s unexpectedly
963
964(S) A routine asked for a symbol from a symbol table that ought to have
965existed already, but for some reason it didn't, and had to be created on
966an emergency basis to prevent a core dump.
967
968=item Hash %%s missing the % in argument %d of %s()
969
970(D) Really old Perl let you omit the % on hash names in some spots. This
971is now heavily deprecated.
972
973=item Identifier "%s::%s" used only once: possible typo
974
975(W) Typographical errors often show up as unique identifiers. If you
976had a good reason for having a unique identifier, then just mention it
977again somehow to suppress the message.
978
979=item Illegal division by zero
980
981(F) You tried to divide a number by 0. Either something was wrong in your
982logic, or you need to put a conditional in to guard against meaningless input.
983
984=item Illegal modulus zero
985
986(F) You tried to divide a number by 0 to get the remainder. Most numbers
987don't take to this kindly.
988
989=item Illegal octal digit
990
991(F) You used an 8 or 9 in a octal number.
992
748a9306
LW
993=item Illegal octal digit ignored
994
995(W) You may have tried to use an 8 or 9 in a octal number. Interpretation
996of the octal number stopped before the 8 or 9.
997
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LW
998=item Insecure dependency in %s
999
1000(F) You tried to do something that the tainting mechanism didn't like.
1001The tainting mechanism is turned on when you're running setuid or setgid,
1002or when you specify B<-T> to turn it on explicitly. The tainting mechanism
1003labels all data that's derived directly or indirectly from the user,
1004who is considered to be unworthy of your trust. If any such data is
1005used in a "dangerous" operation, you get this error. See L<perlsec>
1006for more information.
1007
1008=item Insecure directory in %s
1009
1010(F) You can't use system(), exec(), or a piped open in a setuid or setgid
1011script if $ENV{PATH} contains a directory that is writable by the world.
1012See L<perlsec>.
1013
1014=item Insecure PATH
1015
1016(F) You can't use system(), exec(), or a piped open in a setuid or
1017setgid script if $ENV{PATH} is derived from data supplied (or
1018potentially supplied) by the user. The script must set the path to a
1019known value, using trustworthy data. See L<perlsec>.
1020
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LW
1021=item Internal inconsistency in tracking vforks
1022
1023(S) A warning peculiar to VMS. Perl keeps track of the number
1024of times you've called C<fork> and C<exec>, in order to determine
1025whether the current call to C<exec> should be affect the current
1026script or a subprocess (see L<perlvms/exec>). Somehow, this count
1027has become scrambled, so Perl is making a guess and treating
1028this C<exec> as a request to terminate the Perl script
1029and execute the specified command.
1030
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LW
1031=item internal disaster in regexp
1032
1033(P) Something went badly wrong in the regular expression parser.
1034
1035=item internal urp in regexp at /%s/
1036
1037(P) Something went badly awry in the regular expression parser.
1038
1039=item invalid [] range in regexp
1040
1041(F) The range specified in a character class had a minimum character
1042greater than the maximum character. See L<perlre>.
1043
1044=item ioctl is not implemented
1045
1046(F) Your machine apparently doesn't implement ioctl(), which is pretty
1047strange for a machine that supports C.
1048
1049=item junk on end of regexp
1050
1051(P) The regular expression parser is confused.
1052
1053=item Label not found for "last %s"
1054
1055(F) You named a loop to break out of, but you're not currently in a
1056loop of that name, not even if you count where you were called from.
1057See L<perlfunc/last>.
1058
1059=item Label not found for "next %s"
1060
1061(F) You named a loop to continue, but you're not currently in a loop of
1062that name, not even if you count where you were called from. See
1063L<perlfunc/last>.
1064
1065=item Label not found for "redo %s"
1066
1067(F) You named a loop to restart, but you're not currently in a loop of
1068that name, not even if you count where you were called from. See
1069L<perlfunc/last>.
1070
1071=item listen() on closed fd
1072
1073(W) You tried to do a listen on a closed socket. Did you forget to check
1074the return value of your socket() call? See L<perlfunc/listen>.
1075
1076=item Literal @%s now requires backslash
1077
1078(F) It used to be that Perl would try to guess whether you wanted an
1079array interpolated or a literal @. It did this when the string was
1080first used at runtime. Now strings are parsed at compile time, and
1081ambiguous instances of @ must be disambiguated, either by putting a
1082backslash to indicate a literal, or by declaring (or using) the array
1083within the program before the string (lexically). (Someday it will simply
1084assume that an unbackslashed @ interpolates an array.)
1085
1086=item Method for operation %s not found in package %s during blessing
1087
1088(F) An attempt was made to specify an entry in an overloading table that
1089doesn't somehow point to a valid method. See L<perlovl>.
1090
1091=item Might be a runaway multi-line %s string starting on line %d
1092
1093(S) An advisory indicating that the previous error may have been caused
1094by a missing delimiter on a string or pattern, because it eventually
1095ended earlier on the current line.
1096
1097=item Misplaced _ in number
1098
1099(W) An underline in a decimal constant wasn't on a 3-digit boundary.
1100
1101=item Missing $ on loop variable
1102
1103(F) Apparently you've been programming in csh too much. Variables are always
1104mentioned with the $ in Perl, unlike in the shells, where it can vary from
1105one line to the next.
1106
1107=item Missing comma after first argument to %s function
1108
1109(F) While certain functions allow you to specify a filehandle or an
1110"indirect object" before the argument list, this ain't one of them.
1111
748a9306
LW
1112=item Missing operator before %s?
1113
1114(S) This is an educated guess made in conjunction with the message "%s
1115found where operator expected". Often the missing operator is a comma.
1116
a0d0e21e
LW
1117=item Missing right bracket
1118
1119(F) The lexer counted more opening curly brackets (braces) than closing ones.
1120As a general rule, you'll find it's missing near the place you were last
1121editing.
1122
1123=item Missing semicolon on previous line?
1124
1125(S) This is an educated guess made in conjunction with the message "%s
1126found where operator expected". Don't automatically put a semicolon on
1127the previous line just because you saw this message.
1128
1129=item Modification of a read-only value attempted
1130
1131(F) You tried, directly or indirectly, to change the value of a
1132constant. You didn't, of course, try "2 = 1", since the compiler
1133catches that. But an easy way to do the same thing is:
1134
1135 sub mod { $_[0] = 1 }
1136 mod(2);
1137
1138Another way is to assign to a substr() that's off the end of the string.
1139
1140=item Modification of non-creatable array value attempted, subscript %d
1141
1142(F) You tried to make an array value spring into existence, and the
1143subscript was probably negative, even counting from end of the array
1144backwards.
1145
1146=item Modification of non-creatable hash value attempted, subscript "%s"
1147
1148(F) You tried to make a hash value spring into existence, and it couldn't
1149be created for some peculiar reason.
1150
1151=item Module name must be constant
1152
1153(F) Only a bare module name is allowed as the first argument to a "use".
1154
1155=item msg%s not implemented
1156
1157(F) You don't have System V message IPC on your system.
1158
1159=item Multidimensional syntax %s not supported
1160
1161(W) Multidimensional arrays aren't written like $foo[1,2,3]. They're written
1162like $foo[1][2][3], as in C.
1163
1164=item Negative length
1165
1166(F) You tried to do a read/write/send/recv operation with a buffer length
1167that is less than 0. This is difficult to imagine.
1168
1169=item nested *?+ in regexp
1170
1171(F) You can't quantify a quantifier without intervening parens. So
1172things like ** or +* or ?* are illegal.
1173
1174Note, however, that the minimal matching quantifiers, *?, +? and ?? appear
1175to be nested quantifiers, but aren't. See L<perlre>.
1176
1177=item No #! line
1178
1179(F) The setuid emulator requires that scripts have a well-formed #! line
1180even on machines that don't support the #! construct.
1181
1182=item No %s allowed while running setuid
1183
1184(F) Certain operations are deemed to be too insecure for a setuid or setgid
1185script to even be allowed to attempt. Generally speaking there will be
1186another way to do what you want that is, if not secure, at least securable.
1187See L<perlsec>.
1188
1189=item No B<-e> allowed in setuid scripts
1190
1191(F) A setuid script can't be specified by the user.
1192
1193=item No comma allowed after %s
1194
1195(F) A list operator that has a filehandle or "indirect object" is not
1196allowed to have a comma between that and the following arguments.
1197Otherwise it'd be just another one of the arguments.
1198
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LW
1199=item No command into which to pipe on command line
1200
1201(F) An error peculiar to VMS. Perl handles its own command line redirection,
1202and found a '|' at the end of the command line, so it doesn't know whither you
1203want to pipe the output from this command.
1204
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LW
1205=item No DB::DB routine defined
1206
1207(F) The currently executing code was compiled with the B<-d> switch,
1208but for some reason the perl5db.pl file (or some facsimile thereof)
1209didn't define a routine to be called at the beginning of each
1210statement. Which is odd, because the file should have been required
1211automatically, and should have blown up the require if it didn't parse
1212right.
1213
1214=item No dbm on this machine
1215
1216(P) This is counted as an internal error, because every machine should
1217supply dbm nowadays, since Perl comes with SDBM. See L<SDBM_File>.
1218
1219=item No DBsub routine
1220
1221(F) The currently executing code was compiled with the B<-d> switch,
1222but for some reason the perl5db.pl file (or some facsimile thereof)
1223didn't define a DB::sub routine to be called at the beginning of each
1224ordinary subroutine call.
1225
748a9306
LW
1226=item No error file after 2> or 2>> on command line
1227
1228(F) An error peculiar to VMS. Perl handles its own command line redirection,
1229and found a '2>' or a '2>>' on the command line, but can't find the name of the
1230file to which to write data destined for stderr.
1231
1232=item No input file after < on command line
1233
1234(F) An error peculiar to VMS. Perl handles its own command line redirection,
1235and found a '<' on the command line, but can't find the name of the file from
1236which to read data for stdin.
1237
1238=item No output file after > on command line
1239
1240(F) An error peculiar to VMS. Perl handles its own command line redirection,
1241and found a lone '>' at the end of the command line, so it doesn't know whither
1242you wanted to redirect stdout.
1243
1244=item No output file after > or >> on command line
1245
1246(F) An error peculiar to VMS. Perl handles its own command line redirection,
1247and found a '>' or a '>>' on the command line, but can't find the name of the
1248file to which to write data destined for stdout.
1249
a0d0e21e
LW
1250=item No Perl script found in input
1251
1252(F) You called C<perl -x>, but no line was found in the file beginning
1253with #! and containing the word "perl".
1254
1255=item No setregid available
1256
1257(F) Configure didn't find anything resembling the setregid() call for
1258your system.
1259
1260=item No setreuid available
1261
1262(F) Configure didn't find anything resembling the setreuid() call for
1263your system.
1264
1265=item No space allowed after B<-I>
1266
1267(F) The argument to B<-I> must follow the B<-I> immediately with no
1268intervening space.
1269
748a9306
LW
1270=item No such pipe open
1271
1272(P) An error peculiar to VMS. The internal routine my_pclose() tried to
1273close a pipe which hadn't been opened. This should have been caught earlier as
1274an attempt to close an unopened filehandle.
1275
a0d0e21e
LW
1276=item No such signal: SIG%s
1277
1278(W) You specified a signal name as a subscript to %SIG that was not recognized.
1279Say C<kill -l> in your shell to see the valid signal names on your system.
1280
1281=item Not a CODE reference
1282
1283(F) Perl was trying to evaluate a reference to a code value (that is, a
1284subroutine), but found a reference to something else instead. You can
1285use the ref() function to find out what kind of ref it really was.
1286See also L<perlref>.
1287
1288=item Not a format reference
1289
1290(F) I'm not sure how you managed to generate a reference to an anonymous
1291format, but this indicates you did, and that it didn't exist.
1292
1293=item Not a GLOB reference
1294
1295(F) Perl was trying to evaluate a reference to a "type glob" (that is,
1296a symbol table entry that looks like C<*foo>), but found a reference to
1297something else instead. You can use the ref() function to find out
1298what kind of ref it really was. See L<perlref>.
1299
1300=item Not a HASH reference
1301
1302(F) Perl was trying to evaluate a reference to a hash value, but
1303found a reference to something else instead. You can use the ref()
1304function to find out what kind of ref it really was. See L<perlref>.
1305
1306=item Not a perl script
1307
1308(F) The setuid emulator requires that scripts have a well-formed #! line
1309even on machines that don't support the #! construct. The line must
1310mention perl.
1311
1312=item Not a SCALAR reference
1313
1314(F) Perl was trying to evaluate a reference to a scalar value, but
1315found a reference to something else instead. You can use the ref()
1316function to find out what kind of ref it really was. See L<perlref>.
1317
1318=item Not a subroutine reference
1319
1320(F) Perl was trying to evaluate a reference to a code value (that is, a
1321subroutine), but found a reference to something else instead. You can
1322use the ref() function to find out what kind of ref it really was.
1323See also L<perlref>.
1324
1325=item Not a subroutine reference in %OVERLOAD
1326
1327(F) An attempt was made to specify an entry in an overloading table that
1328doesn't somehow point to a valid subroutine. See L<perlovl>.
1329
1330=item Not an ARRAY reference
1331
1332(F) Perl was trying to evaluate a reference to an array value, but
1333found a reference to something else instead. You can use the ref()
1334function to find out what kind of ref it really was. See L<perlref>.
1335
1336=item Not enough arguments for %s
1337
1338(F) The function requires more arguments than you specified.
1339
1340=item Not enough format arguments
1341
1342(W) A format specified more picture fields than the next line supplied.
1343See L<perlform>.
1344
1345=item Null filename used
1346
1347(F) You can't require the null filename, especially since on many machines
1348that means the current directory! See L<perlfunc/require>.
1349
1350=item NULL OP IN RUN
1351
1352(P) Some internal routine called run() with a null opcode pointer.
1353
1354=item Null realloc
1355
1356(P) An attempt was made to realloc NULL.
1357
1358=item NULL regexp argument
1359
1360(P) The internal pattern matching routines blew it bigtime.
1361
1362=item NULL regexp parameter
1363
1364(P) The internal pattern matching routines are out of their gourd.
1365
1366=item Odd number of elements in hash list
1367
1368(S) You specified an odd number of elements to a hash list, which is odd,
1369since hash lists come in key/value pairs.
1370
1371=item oops: oopsAV
1372
1373(S) An internal warning that the grammar is screwed up.
1374
1375=item oops: oopsHV
1376
1377(S) An internal warning that the grammar is screwed up.
1378
1379=item Operation `%s' %s: no method found,
1380
1381(F) An attempt was made to use an entry in an overloading table that
1382somehow no longer points to a valid method. See L<perlovl>.
1383
748a9306
LW
1384=item Operator or semicolon missing before %s
1385
1386(S) You used a variable or subroutine call where the parser was
1387expecting an operator. The parser has assumed you really meant
1388to use an operator, but this is highly likely to be incorrect.
1389For example, if you say "*foo *foo" it will be interpreted as
1390if you said "*foo * 'foo'".
1391
a0d0e21e
LW
1392=item Out of memory for yacc stack
1393
1394(F) The yacc parser wanted to grow its stack so it could continue parsing,
1395but realloc() wouldn't give it more memory, virtual or otherwise.
1396
1397=item Out of memory!
1398
1399(X) The malloc() function returned 0, indicating there was insufficient
1400remaining memory (or virtual memory) to satisfy the request.
1401
1402=item page overflow
1403
1404(W) A single call to write() produced more lines than can fit on a page.
1405See L<perlform>.
1406
1407=item panic: ck_grep
1408
1409(P) Failed an internal consistency check trying to compile a grep.
1410
1411=item panic: ck_split
1412
1413(P) Failed an internal consistency check trying to compile a split.
1414
1415=item panic: corrupt saved stack index
1416
1417(P) The savestack was requested to restore more localized values than there
1418are in the savestack.
1419
1420=item panic: die %s
1421
1422(P) We popped the context stack to an eval context, and then discovered
1423it wasn't an eval context.
1424
1425=item panic: do_match
1426
1427(P) The internal pp_match() routine was called with invalid operational data.
1428
1429=item panic: do_split
1430
1431(P) Something terrible went wrong in setting up for the split.
1432
1433=item panic: do_subst
1434
1435(P) The internal pp_subst() routine was called with invalid operational data.
1436
1437=item panic: do_trans
1438
1439(P) The internal do_trans() routine was called with invalid operational data.
1440
1441=item panic: goto
1442
1443(P) We popped the context stack to a context with the specified label,
1444and then discovered it wasn't a context we know how to do a goto in.
1445
1446=item panic: INTERPCASEMOD
1447
1448(P) The lexer got into a bad state at a case modifier.
1449
1450=item panic: INTERPCONCAT
1451
1452(P) The lexer got into a bad state parsing a string with brackets.
1453
1454=item panic: last
1455
1456(P) We popped the context stack to a block context, and then discovered
1457it wasn't a block context.
1458
1459=item panic: leave_scope clearsv
1460
1461(P) A writable lexical variable became readonly somehow within the scope.
1462
1463=item panic: leave_scope inconsistency
1464
1465(P) The savestack probably got out of sync. At least, there was an
1466invalid enum on the top of it.
1467
1468=item panic: malloc
1469
1470(P) Something requested a negative number of bytes of malloc.
1471
1472=item panic: mapstart
1473
1474(P) The compiler is screwed up with respect to the map() function.
1475
1476=item panic: null array
1477
1478(P) One of the internal array routines was passed a null AV pointer.
1479
1480=item panic: pad_alloc
1481
1482(P) The compiler got confused about which scratch pad it was allocating
1483and freeing temporaries and lexicals from.
1484
1485=item panic: pad_free curpad
1486
1487(P) The compiler got confused about which scratch pad it was allocating
1488and freeing temporaries and lexicals from.
1489
1490=item panic: pad_free po
1491
1492(P) An invalid scratch pad offset was detected internally.
1493
1494=item panic: pad_reset curpad
1495
1496(P) The compiler got confused about which scratch pad it was allocating
1497and freeing temporaries and lexicals from.
1498
1499=item panic: pad_sv po
1500
1501(P) An invalid scratch pad offset was detected internally.
1502
1503=item panic: pad_swipe curpad
1504
1505(P) The compiler got confused about which scratch pad it was allocating
1506and freeing temporaries and lexicals from.
1507
1508=item panic: pad_swipe po
1509
1510(P) An invalid scratch pad offset was detected internally.
1511
1512=item panic: pp_iter
1513
1514(P) The foreach iterator got called in a non-loop context frame.
1515
1516=item panic: realloc
1517
1518(P) Something requested a negative number of bytes of realloc.
1519
1520=item panic: restartop
1521
1522(P) Some internal routine requested a goto (or something like it), and
1523didn't supply the destination.
1524
1525=item panic: return
1526
1527(P) We popped the context stack to a subroutine or eval context, and
1528then discovered it wasn't a subroutine or eval context.
1529
1530=item panic: scan_num
1531
1532(P) scan_num() got called on something that wasn't a number.
1533
1534=item panic: sv_insert
1535
1536(P) The sv_insert() routine was told to remove more string than there
1537was string.
1538
1539=item panic: top_env
1540
1541(P) The compiler attempted to do a goto, or something weird like that.
1542
1543=item panic: yylex
1544
1545(P) The lexer got into a bad state while processing a case modifier.
1546
1547=item Parens missing around "%s" list
1548
1549(W) You said something like
1550
1551 my $foo, $bar = @_;
1552
1553when you meant
1554
1555 my ($foo, $bar) = @_;
1556
1557Remember that "my" and "local" bind closer than comma.
1558
1559=item Perl %3.3f required--this is only version %s, stopped
1560
1561(F) The module in question uses features of a version of Perl more recent
1562than the currently running version. How long has it been since you upgraded,
1563anyway? See L<perlfunc/require>.
1564
1565=item Permission denied
1566
1567(F) The setuid emulator in suidperl decided you were up to no good.
1568
748a9306
LW
1569=item pid %d not a child
1570
1571(W) A warning peculiar to VMS. Waitpid() was asked to wait for a process which
1572isn't a subprocess of the current process. While this is fine from VMS'
1573perspective, it's probably not what you intended.
1574
a0d0e21e
LW
1575=item POSIX getpgrp can't take an argument
1576
1577(F) Your C compiler uses POSIX getpgrp(), which takes no argument, unlike
1578the BSD version, which takes a pid.
1579
1580=item Possible memory corruption: %s overflowed 3rd argument
1581
1582(F) An ioctl() or fcntl() returned more than Perl was bargaining for.
1583Perl guesses a reasonable buffer size, but puts a sentinel byte at the
1584end of the buffer just in case. This sentinel byte got clobbered, and
1585Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>.
1586
1587=item Precedence problem: open %s should be open(%s)
1588
1589(S) The old irregular construct
cb1a09d0 1590
a0d0e21e
LW
1591 open FOO || die;
1592
1593is now misinterpreted as
1594
1595 open(FOO || die);
1596
1597because of the strict regularization of Perl 5's grammar into unary and
1598list operators. (The old open was a little of both.) You must put
1599parens around the filehandle, or use the new "or" operator instead of "||".
1600
1601=item print on closed filehandle %s
1602
1603(W) The filehandle you're printing on got itself closed sometime before now.
1604Check your logic flow.
1605
1606=item printf on closed filehandle %s
1607
1608(W) The filehandle you're writing to got itself closed sometime before now.
1609Check your logic flow.
1610
1611=item Probable precedence problem on %s
1612
1613(W) The compiler found a bare word where it expected a conditional,
1614which often indicates that an || or && was parsed as part of the
1615last argument of the previous construct, for example:
1616
1617 open FOO || die;
1618
4633a7c4
LW
1619=item Prototype mismatch: (%s) vs (%s)
1620
1621(S) The subroutine being defined had a predeclared (forward) declaration
1622with a different function prototype.
1623
a0d0e21e
LW
1624=item Read on closed filehandle <%s>
1625
1626(W) The filehandle you're reading from got itself closed sometime before now.
1627Check your logic flow.
1628
1629=item Reallocation too large: %lx
1630
1631(F) You can't allocate more than 64K on an MSDOS machine.
1632
1633=item Recompile perl with B<-D>DEBUGGING to use B<-D> switch
1634
1635(F) You can't use the B<-D> option unless the code to produce the
1636desired output is compiled into Perl, which entails some overhead,
1637which is why it's currently left out of your copy.
1638
1639=item Recursive inheritance detected
1640
1641(F) More than 100 levels of inheritance were used. Probably indicates
1642an unintended loop in your inheritance hierarchy.
1643
1644=item Reference miscount in sv_replace()
1645
1646(W) The internal sv_replace() function was handed a new SV with a
1647reference count of other than 1.
1648
1649=item regexp memory corruption
1650
1651(P) The regular expression engine got confused by what the regular
1652expression compiler gave it.
1653
1654=item regexp out of space
1655
1656(P) A "can't happen" error, because safemalloc() should have caught it earlier.
1657
1658=item regexp too big
1659
1660(F) The current implementation of regular expression uses shorts as
1661address offsets within a string. Unfortunately this means that if
1662the regular expression compiles to longer than 32767, it'll blow up.
1663Usually when you want a regular expression this big, there is a better
1664way to do it with multiple statements. See L<perlre>.
1665
1666=item Reversed %s= operator
1667
1668(W) You wrote your assignment operator backwards. The = must always
1669comes last, to avoid ambiguity with subsequent unary operators.
1670
1671=item Runaway format
1672
1673(F) Your format contained the ~~ repeat-until-blank sequence, but it
1674produced 200 lines at once, and the 200th line looked exactly like the
1675199th line. Apparently you didn't arrange for the arguments to exhaust
1676themselves, either by using ^ instead of @ (for scalar variables), or by
1677shifting or popping (for array variables). See L<perlform>.
1678
1679=item Scalar value @%s[%s] better written as $%s[%s]
1680
1681(W) You've used an array slice (indicated by @) to select a single value of
1682an array. Generally it's better to ask for a scalar value (indicated by $).
1683The difference is that $foo[&bar] always behaves like a scalar, both when
1684assigning to it and when evaluating its argument, while @foo[&bar] behaves
1685like a list when you assign to it, and provides a list context to its
1686subscript, which can do weird things if you're only expecting one subscript.
1687
748a9306
LW
1688On the other hand, if you were actually hoping to treat the array
1689element as a list, you need to look into how references work, since
1690Perl will not magically convert between scalars and lists for you. See
1691L<perlref>.
1692
a0d0e21e
LW
1693=item Script is not setuid/setgid in suidperl
1694
1695(F) Oddly, the suidperl program was invoked on a script with its setuid
1696or setgid bit set. This doesn't make much sense.
1697
1698=item Search pattern not terminated
1699
1700(F) The lexer couldn't find the final delimiter of a // or m{}
1701construct. Remember that bracketing delimiters count nesting level.
1702
1703=item seek() on unopened file
1704
1705(W) You tried to use the seek() function on a filehandle that was either
1706never opened or has been closed since.
1707
1708=item select not implemented
1709
1710(F) This machine doesn't implement the select() system call.
1711
1712=item sem%s not implemented
1713
1714(F) You don't have System V semaphore IPC on your system.
1715
1716=item semi-panic: attempt to dup freed string
1717
1718(S) The internal newSVsv() routine was called to duplicate a scalar
1719that had previously been marked as free.
1720
1721=item Semicolon seems to be missing
1722
1723(W) A nearby syntax error was probably caused by a missing semicolon,
1724or possibly some other missing operator, such as a comma.
1725
1726=item Send on closed socket
1727
1728(W) The filehandle you're sending to got itself closed sometime before now.
1729Check your logic flow.
1730
1731=item Sequence (?#... not terminated
1732
1733(F) A regular expression comment must be terminated by a closing
1734parenthesis. Embedded parens aren't allowed. See L<perlre>.
1735
1736=item Sequence (?%s...) not implemented
1737
1738(F) A proposed regular expression extension has the character reserved
1739but has not yet been written. See L<perlre>.
1740
1741=item Sequence (?%s...) not recognized
1742
1743(F) You used a regular expression extension that doesn't make sense.
1744See L<perlre>.
1745
1746=item setegid() not implemented
1747
1748(F) You tried to assign to $), and your operating system doesn't support
1749the setegid() system call (or equivalent), or at least Configure didn't
1750think so.
1751
1752=item seteuid() not implemented
1753
1754(F) You tried to assign to $>, and your operating system doesn't support
1755the seteuid() system call (or equivalent), or at least Configure didn't
1756think so.
1757
1758=item setrgid() not implemented
1759
1760(F) You tried to assign to $(, and your operating system doesn't support
1761the setrgid() system call (or equivalent), or at least Configure didn't
1762think so.
1763
1764=item setruid() not implemented
1765
1766(F) You tried to assign to $<, and your operating system doesn't support
1767the setruid() system call (or equivalent), or at least Configure didn't
1768think so.
1769
1770=item Setuid/gid script is writable by world
1771
1772(F) The setuid emulator won't run a script that is writable by the world,
1773because the world might have written on it already.
1774
1775=item shm%s not implemented
1776
1777(F) You don't have System V shared memory IPC on your system.
1778
1779=item shutdown() on closed fd
1780
1781(W) You tried to do a shutdown on a closed socket. Seems a bit superfluous.
1782
1783=item SIG%s handler "%s" not defined.
1784
1785(W) The signal handler named in %SIG doesn't, in fact, exist. Perhaps you
1786put it into the wrong package?
1787
1788=item sort is now a reserved word
1789
1790(F) An ancient error message that almost nobody ever runs into anymore.
1791But before sort was a keyword, people sometimes used it as a filehandle.
1792
1793=item Sort subroutine didn't return a numeric value
1794
1795(F) A sort comparison routine must return a number. You probably blew
4633a7c4 1796it by not using C<E<lt>=E<gt>> or C<cmp>, or by not using them correctly.
a0d0e21e
LW
1797See L<perlfunc/sort>.
1798
1799=item Sort subroutine didn't return single value
1800
1801(F) A sort comparison subroutine may not return a list value with more
1802or less than one element. See L<perlfunc/sort>.
1803
1804=item Split loop
1805
1806(P) The split was looping infinitely. (Obviously, a split shouldn't iterate
1807more times than there are characters of input, which is what happened.)
1808See L<perlfunc/split>.
1809
1810=item Stat on unopened file <%s>
1811
1812(W) You tried to use the stat() function (or an equivalent file test)
1813on a filehandle that was either never opened or has been closed since.
1814
1815=item Statement unlikely to be reached
1816
1817(W) You did an exec() with some statement after it other than a die().
1818This is almost always an error, because exec() never returns unless
1819there was a failure. You probably wanted to use system() instead,
1820which does return. To suppress this warning, put the exec() in a block
1821by itself.
1822
1823=item Subroutine %s redefined
1824
1825(W) You redefined a subroutine. To suppress this warning, say
1826
1827 {
1828 local $^W = 0;
1829 eval "sub name { ... }";
1830 }
1831
1832=item Substitution loop
1833
1834(P) The substitution was looping infinitely. (Obviously, a
1835substitution shouldn't iterate more times than there are characters of
1836input, which is what happened.) See the discussion of substitution in
1837L<perlop/"Quote and Quotelike Operators">.
1838
1839=item Substitution pattern not terminated
1840
1841(F) The lexer couldn't find the interior delimiter of a s/// or s{}{}
1842construct. Remember that bracketing delimiters count nesting level.
1843
1844=item Substitution replacement not terminated
1845
1846(F) The lexer couldn't find the final delimiter of a s/// or s{}{}
1847construct. Remember that bracketing delimiters count nesting level.
1848
1849=item substr outside of string
1850
1851(W) You tried to reference a substr() that pointed outside of a string.
1852That is, the absolute value of the offset was larger than the length of
1853the string. See L<perlfunc/substr>.
1854
1855=item suidperl is no longer needed since...
1856
1857(F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a
1858version of the setuid emulator somehow got run anyway.
1859
1860=item syntax error
1861
1862(F) Probably means you had a syntax error. Common reasons include:
1863
1864 A keyword is misspelled.
1865 A semicolon is missing.
1866 A comma is missing.
1867 An opening or closing parenthesis is missing.
1868 An opening or closing brace is missing.
1869 A closing quote is missing.
1870
1871Often there will be another error message associated with the syntax
1872error giving more information. (Sometimes it helps to turn on B<-w>.)
1873The error message itself often tells you where it was in the line when
1874it decided to give up. Sometimes the actual error is several tokens
1875before this, since Perl is good at understanding random input.
1876Occasionally the line number may be misleading, and once in a blue moon
1877the only way to figure out what's triggering the error is to call
1878C<perl -c> repeatedly, chopping away half the program each time to see
1879if the error went away. Sort of the cybernetic version of S<20 questions>.
1880
cb1a09d0
AD
1881=item syntax error at line %d: `%s' unexpected
1882
1883(A) You've accidentally run your script through the Bourne shell
1884instead of Perl. Check the <#!> line, or manually feed your script
1885into Perl yourself.
1886
a0d0e21e
LW
1887=item System V IPC is not implemented on this machine
1888
1889(F) You tried to do something with a function beginning with "sem", "shm"
1890or "msg". See L<perlfunc/semctl>, for example.
1891
1892=item Syswrite on closed filehandle
1893
1894(W) The filehandle you're writing to got itself closed sometime before now.
1895Check your logic flow.
1896
1897=item tell() on unopened file
1898
1899(W) You tried to use the tell() function on a filehandle that was either
1900never opened or has been closed since.
1901
1902=item Test on unopened file <%s>
1903
1904(W) You tried to invoke a file test operator on a filehandle that isn't
1905open. Check your logic. See also L<perlfunc/-X>.
1906
1907=item That use of $[ is unsupported
1908
1909(F) Assignment to $[ is now strictly circumscribed, and interpreted as
1910a compiler directive. You may only say one of
1911
1912 $[ = 0;
1913 $[ = 1;
1914 ...
1915 local $[ = 0;
1916 local $[ = 1;
1917 ...
1918
1919This is to prevent the problem of one module changing the array base
1920out from under another module inadvertently. See L<perlvar/$[>.
1921
1922=item The %s function is unimplemented
1923
1924The function indicated isn't implemented on this architecture, according
1925to the probings of Configure.
1926
1927=item The crypt() function is unimplemented due to excessive paranoia.
1928
1929(F) Configure couldn't find the crypt() function on your machine,
1930probably because your vendor didn't supply it, probably because they
1931think the U.S. Govermnment thinks it's a secret, or at least that they
1932will continue to pretend that it is. And if you quote me on that, I
1933will deny it.
1934
1935=item The stat preceding C<-l _> wasn't an lstat
1936
1937(F) It makes no sense to test the current stat buffer for symbolic linkhood
1938if the last stat that wrote to the stat buffer already went past
1939the symlink to get to the real file. Use an actual filename instead.
1940
1941=item times not implemented
1942
1943(F) Your version of the C library apparently doesn't do times(). I suspect
1944you're not running on Unix.
1945
1946=item Too few args to syscall
1947
1948(F) There has to be at least one argument to syscall() to specify the
1949system call to call, silly dilly.
1950
cb1a09d0
AD
1951=item Too many ('s
1952
1953=item Too many )'s
1954
1955(A) You've accidentally run your script through B<csh> instead
1956of Perl. Check the <#!> line, or manually feed your script
1957into Perl yourself.
1958
a0d0e21e
LW
1959=item Too many args to syscall
1960
1961(F) Perl only supports a maximum of 14 args to syscall().
1962
1963=item Too many arguments for %s
1964
1965(F) The function requires fewer arguments than you specified.
1966
1967=item trailing \ in regexp
1968
1969(F) The regular expression ends with an unbackslashed backslash. Backslash
1970it. See L<perlre>.
1971
1972=item Translation pattern not terminated
1973
1974(F) The lexer couldn't find the interior delimiter of a tr/// or tr[][]
1975construct.
1976
1977=item Translation replacement not terminated
1978
1979(F) The lexer couldn't find the final delimiter of a tr/// or tr[][]
1980construct.
1981
1982=item truncate not implemented
1983
1984(F) Your machine doesn't implement a file truncation mechanism that
1985Configure knows about.
1986
1987=item Type of arg %d to %s must be %s (not %s)
1988
1989(F) This function requires the argument in that position to be of a
1990certain type. Arrays must be @NAME or @{EXPR}. Hashes must be
1991%NAME or %{EXPR}. No implicit dereferencing is allowed--use the
1992{EXPR} forms as an explicit dereference. See L<perlref>.
1993
1994=item umask: argument is missing initial 0
1995
1996(W) A umask of 222 is incorrect. It should be 0222, since octal literals
1997always start with 0 in Perl, as in C.
1998
4633a7c4
LW
1999=item Unable to create sub named "%s"
2000
2001(F) You attempted to create or access a subroutine with an illegal name.
2002
a0d0e21e
LW
2003=item Unbalanced context: %d more PUSHes than POPs
2004
2005(W) The exit code detected an internal inconsistency in how many execution
2006contexts were entered and left.
2007
2008=item Unbalanced saves: %d more saves than restores
2009
2010(W) The exit code detected an internal inconsistency in how many
2011values were temporarily localized.
2012
2013=item Unbalanced scopes: %d more ENTERs than LEAVEs
2014
2015(W) The exit code detected an internal inconsistency in how many blocks
2016were entered and left.
2017
2018=item Unbalanced tmps: %d more allocs than frees
2019
2020(W) The exit code detected an internal inconsistency in how many mortal
2021scalars were allocated and freed.
2022
2023=item Undefined format "%s" called
2024
2025(F) The format indicated doesn't seem to exist. Perhaps it's really in
2026another package? See L<perlform>.
2027
2028=item Undefined sort subroutine "%s" called
2029
2030(F) The sort comparison routine specified doesn't seem to exist. Perhaps
2031it's in a different package? See L<perlfunc/sort>.
2032
2033=item Undefined subroutine &%s called
2034
2035(F) The subroutine indicated hasn't been defined, or if it was, it
2036has since been undefined.
2037
2038=item Undefined subroutine called
2039
2040(F) The anonymous subroutine you're trying to call hasn't been defined,
2041or if it was, it has since been undefined.
2042
2043=item Undefined subroutine in sort
2044
2045(F) The sort comparison routine specified is declared but doesn't seem to
2046have been defined yet. See L<perlfunc/sort>.
2047
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2048=item Undefined top format "%s" called
2049
2050(F) The format indicated doesn't seem to exist. Perhaps it's really in
2051another package? See L<perlform>.
2052
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2053=item unexec of %s into %s failed!
2054
2055(F) The unexec() routine failed for some reason. See your local FSF
2056representative, who probably put it there in the first place.
2057
2058=item Unknown BYTEORDER
2059
2060(F) There are no byteswapping functions for a machine with this byte order.
2061
2062=item unmatched () in regexp
2063
2064(F) Unbackslashed parentheses must always be balanced in regular
2065expressions. If you're a vi user, the % key is valuable for finding
2066the matching paren. See L<perlre>.
2067
2068=item Unmatched right bracket
2069
2070(F) The lexer counted more closing curly brackets (braces) than opening
2071ones, so you're probably missing an opening bracket. As a general
2072rule, you'll find the missing one (so to speak) near the place you were
2073last editing.
2074
2075=item unmatched [] in regexp
2076
2077(F) The brackets around a character class must match. If you wish to
2078include a closing bracket in a character class, backslash it or put it first.
2079See L<perlre>.
2080
2081=item Unquoted string "%s" may clash with future reserved word
2082
2083(W) You used a bare word that might someday be claimed as a reserved word.
2084It's best to put such a word in quotes, or capitalize it somehow, or insert
2085an underbar into it. You might also declare it as a subroutine.
2086
2087=item Unrecognized character \%03o ignored
2088
2089(S) A garbage character was found in the input, and ignored, in case it's
2090a weird control character on an EBCDIC machine, or some such.
2091
2092=item Unrecognized signal name "%s"
2093
2094(F) You specified a signal name to the kill() function that was not recognized.
2095Say C<kill -l> in your shell to see the valid signal names on your system.
2096
2097=item Unrecognized switch: -%s
2098
2099(F) You specified an illegal option to Perl. Don't do that.
2100(If you think you didn't do that, check the #! line to see if it's
2101supplying the bad switch on your behalf.)
2102
2103=item Unsuccessful %s on filename containing newline
2104
2105(W) A file operation was attempted on a filename, and that operation
2106failed, PROBABLY because the filename contained a newline, PROBABLY
2107because you forgot to chop() or chomp() it off. See L<perlfunc/chop>.
2108
2109=item Unsupported directory function "%s" called
2110
2111(F) Your machine doesn't support opendir() and readdir().
2112
2113=item Unsupported function %s
2114
2115(F) This machines doesn't implement the indicated function, apparently.
2116At least, Configure doesn't think so.
2117
2118=item Unsupported socket function "%s" called
2119
2120(F) Your machine doesn't support the Berkeley socket mechanism, or at
2121least that's what Configure thought.
2122
2123=item Unterminated <> operator
2124
2125(F) The lexer saw a left angle bracket in a place where it was expecting
2126a term, so it's looking for the corresponding right angle bracket, and not
2127finding it. Chances are you left some needed parentheses out earlier in
2128the line, and you really meant a "less than".
2129
2130=item Use of $# is deprecated
2131
2132(D) This was an ill-advised attempt to emulate a poorly defined awk feature.
2133Use an explicit printf() or sprintf() instead.
2134
2135=item Use of $* is deprecated
2136
2137(D) This variable magically turned on multiline pattern matching, both for
2138you and for any luckless subroutine that you happen to call. You should
2139use the new C<//m> and C<//s> modifiers now to do that without the dangerous
2140action-at-a-distance effects of C<$*>.
2141
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LW
2142=item Use of %s in printf format not supported
2143
2144(F) You attempted to use a feature of printf that is accessible only
2145from C. This usually means there's a better way to do it in Perl.
2146
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2147=item Use of %s is deprecated
2148
2149(D) The construct indicated is no longer recommended for use, generally
2150because there's a better way to do it, and also because the old way has
2151bad side effects.
2152
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LW
2153=item Use of bare << to mean <<"" is deprecated
2154
2155(D) You are now encouraged to use the explicitly quoted form if you
2156wish to use a blank line as the terminator of the here-document.
2157
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2158=item Use of implicit split to @_ is deprecated
2159
2160(D) It makes a lot of work for the compiler when you clobber a
2161subroutine's argument list, so it's better if you assign the results of
2162a split() explicitly to an array (or list).
2163
2164=item Use of uninitialized value
2165
2166(W) An undefined value was used as if it were already defined. It was
2167interpreted as a "" or a 0, but maybe it was a mistake. To suppress this
2168warning assign an initial value to your variables.
2169
2170=item Useless use of %s in void context
2171
2172(W) You did something without a side effect in a context that does nothing
2173with the return value, such as a statement that doesn't return a value
2174from a block, or the left side of a scalar comma operator. Very often
2175this points not to stupidity on your part, but a failure of Perl to parse
2176your program the way you thought it would. For example, you'd get this
2177if you mixed up your C precedence with Python precedence and said
2178
2179 $one, $two = 1, 2;
2180
2181when you meant to say
2182
2183 ($one, $two) = (1, 2);
2184
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LW
2185Another common error is to use ordinary parentheses to construct a list
2186reference when you should be using square or curly brackets, for
2187example, if you say
2188
2189 $array = (1,2);
2190
2191when you should have said
2192
2193 $array = [1,2];
2194
2195The square brackets explicitly turn a list value into a scalar value,
2196while parentheses do not. So when a parenthesized list is evaluated in
2197a scalar context, the comma is treated like C's comma operator, which
2198throws away the left argument, which is not what you want. See
2199L<perlref> for more on this.
2200
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2201=item Variable "%s" is not exported
2202
2203(F) While "use strict" in effect, you referred to a global variable
2204that you apparently thought was imported from another module, because
2205something else of the same name (usually a subroutine) is exported
2206by that module. It usually means you put the wrong funny character
2207on the front of your variable.
2208
cb1a09d0
AD
2209=item Variable syntax.
2210
2211(A) You've accidentally run your script through B<csh> instead
2212of Perl. Check the <#!> line, or manually feed your script
2213into Perl yourself.
2214
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2215=item Warning: unable to close filehandle %s properly.
2216
2217(S) The implicit close() done by an open() got an error indication on the
2218close(0. This usually indicates your filesystem ran out of disk space.
2219
2220=item Warning: Use of "%s" without parens is ambiguous
2221
2222(S) You wrote a unary operator followed by something that looks like a
2223binary operator that could also have been interpreted as a term or
2224unary operator. For instance, if you know that the rand function
2225has a default argument of 1.0, and you write
2226
2227 rand + 5;
2228
2229you may THINK you wrote the same thing as
2230
2231 rand() + 5;
2232
2233but in actual fact, you got
2234
2235 rand(+5);
2236
2237So put in parens to say what you really mean.
2238
2239=item Write on closed filehandle
2240
2241(W) The filehandle you're writing to got itself closed sometime before now.
2242Check your logic flow.
2243
2244=item X outside of string
2245
2246(F) You had a pack template that specified a relative position before
2247the beginning of the string being unpacked. See L<perlfunc/pack>.
2248
2249=item x outside of string
2250
2251(F) You had a pack template that specified a relative position after
2252the end of the string being unpacked. See L<perlfunc/pack>.
2253
2254=item Xsub "%s" called in sort
2255
2256(F) The use of an external subroutine as a sort comparison is not yet supported.
2257
2258=item Xsub called in sort
2259
2260(F) The use of an external subroutine as a sort comparison is not yet supported.
2261
2262=item You can't use C<-l> on a filehandle
2263
2264(F) A filehandle represents an opened file, and when you opened the file it
2265already went past any symlink you are presumably trying to look for.
2266Use a filename instead.
2267
2268=item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!
2269
2270(F) And you probably never will, since you probably don't have the
2271sources to your kernel, and your vendor probably doesn't give a rip
2272about what you want. Your best bet is to use the wrapsuid script in
2273the eg directory to put a setuid C wrapper around your script.
2274
2275=item You need to quote "%s"
2276
2277(W) You assigned a bareword as a signal handler name. Unfortunately, you
2278already have a subroutine of that name declared, which means that Perl 5
2279will try to call the subroutine when the assignment is executed, which is
2280probably not what you want. (If it IS what you want, put an & in front.)
2281
2282=item [gs]etsockopt() on closed fd
2283
2284(W) You tried to get or set a socket option on a closed socket.
2285Did you forget to check the return value of your socket() call?
2286See L<perlfunc/getsockopt>.
2287
2288=item \1 better written as $1
2289
2290(W) Outside of patterns, backreferences live on as variables. The use
2291of backslashes is grandfathered on the righthand side of a
2292substitution, but stylistically it's better to use the variable form
2293because other Perl programmers will expect it, and it works better
2294if there are more than 9 backreferences.
2295
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LW
2296=item '|' and '<' may not both be specified on command line
2297
2298(F) An error peculiar to VMS. Perl does its own command line redirection, and
2299found that STDIN was a pipe, and that you also tried to redirect STDIN using
2300'<'. Only one STDIN stream to a customer, please.
2301
2302=item '|' and '>' may not both be specified on command line
2303
2304(F) An error peculiar to VMS. Perl does its own command line redirection, and
2305thinks you tried to redirect stdout both to a file and into a pipe to another
2306command. You need to choose one or the other, though nothing's stopping you
2307from piping into a program or Perl script which 'splits' output into two
2308streams, such as
2309
2310 open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
2311 while (<STDIN>) {
2312 print;
2313 print OUT;
2314 }
2315 close OUT;
2316
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LW
2317=back
2318