3 perldiag - various Perl diagnostics
7 These messages are classified as follows (listed in increasing order of
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 (nontrappable).
16 (A) An alien error message (not generated by Perl).
18 Optional warnings are enabled by using the B<-w> switch. Warnings may
19 be captured by setting C<$SIG{__WARN__}> to a reference to a routine that
20 will be called on each warning instead of printing it. See L<perlvar>.
21 Trappable errors may be trapped using the eval operator. See
24 Some of these messages are generic. Spots that vary are denoted with a %s,
25 just as in a printf format. Note that some messages start with a %s!
26 The symbols C<"%(-?@> sort before the letters, while C<[> and C<\> sort after.
30 =item "my" variable %s can't be in a package
32 (F) Lexically scoped variables aren't in a package, so it doesn't make sense
33 to try to declare one with a package qualifier on the front. Use local()
34 if you want to localize a package variable.
36 =item "my" variable %s masks earlier declaration in same scope
38 (W) A lexical variable has been redeclared in the same scope, effectively
39 eliminating all access to the previous instance. This is almost always
40 a typographical error. Note that the earlier variable will still exist
41 until the end of the scope or until all closure referents to it are
44 =item "no" not allowed in expression
46 (F) The "no" keyword is recognized and executed at compile time, and returns
47 no useful value. See L<perlmod>.
49 =item "use" not allowed in expression
51 (F) The "use" keyword is recognized and executed at compile time, and returns
52 no useful value. See L<perlmod>.
54 =item % may only be used in unpack
56 (F) You can't pack a string by supplying a checksum, because the
57 checksumming process loses information, and you can't go the other
58 way. See L<perlfunc/unpack>.
60 =item %s (...) interpreted as function
62 (W) You've run afoul of the rule that says that any list operator followed
63 by parentheses turns into a function, with all the list operators arguments
64 found inside the parentheses. See L<perlop/Terms and List Operators (Leftward)>.
66 =item %s argument is not a HASH element
68 (F) The argument to exists() must be a hash element, such as
73 =item %s argument is not a HASH element or slice
75 (F) The argument to delete() must be either a hash element, such as
80 or a hash slice, such as
82 @foo{$bar, $baz, $xyzzy}
83 @{$ref->[12]}{"susie", "queue"}
85 =item %s did not return a true value
87 (F) A required (or used) file must return a true value to indicate that
88 it compiled correctly and ran its initialization code correctly. It's
89 traditional to end such a file with a "1;", though any true value would
90 do. See L<perlfunc/require>.
92 =item %s found where operator expected
94 (S) The Perl lexer knows whether to expect a term or an operator. If it
95 sees what it knows to be a term when it was expecting to see an operator,
96 it gives you this warning. Usually it indicates that an operator or
97 delimiter was omitted, such as a semicolon.
99 =item %s had compilation errors
101 (F) The final summary message when a C<perl -c> fails.
103 =item %s has too many errors
105 (F) The parser has given up trying to parse the program after 10 errors.
106 Further error messages would likely be uninformative.
108 =item %s matches null string many times
110 (W) The pattern you've specified would be an infinite loop if the
111 regular expression engine didn't specifically check for that. See L<perlre>.
113 =item %s never introduced
115 (S) The symbol in question was declared but somehow went out of scope
116 before it could possibly have been used.
120 (F) The final summary message when a C<perl -c> succeeds.
122 =item %s: Command not found
124 (A) You've accidentally run your script through B<csh> instead
125 of Perl. Check the #! line, or manually feed your script into
128 =item %s: Expression syntax
130 (A) You've accidentally run your script through B<csh> instead
131 of Perl. Check the #! line, or manually feed your script into
134 =item %s: Undefined variable
136 (A) You've accidentally run your script through B<csh> instead
137 of Perl. Check the #! line, or manually feed your script into
142 (A) You've accidentally run your script through the Bourne shell
143 instead of Perl. Check the #! line, or manually feed your script
146 =item (Missing semicolon on previous line?)
148 (S) This is an educated guess made in conjunction with the message "%s
149 found where operator expected". Don't automatically put a semicolon on
150 the previous line just because you saw this message.
152 =item B<-P> not allowed for setuid/setgid script
154 (F) The script would have to be opened by the C preprocessor by name,
155 which provides a race condition that breaks security.
157 =item C<-T> and C<-B> not implemented on filehandles
159 (F) Perl can't peek at the stdio buffer of filehandles when it doesn't
160 know about your kind of stdio. You'll have to use a filename instead.
162 =item C<-p> destination: %s
164 (F) An error occurred during the implicit output invoked by the C<-p>
165 command-line switch. (This output goes to STDOUT unless you've
166 redirected it with select().)
168 =item 500 Server error
172 =item ?+* follows nothing in regexp
174 (F) You started a regular expression with a quantifier. Backslash it
175 if you meant it literally. See L<perlre>.
177 =item @ outside of string
179 (F) You had a pack template that specified an absolute position outside
180 the string being unpacked. See L<perlfunc/pack>.
182 =item accept() on closed fd
184 (W) You tried to do an accept on a closed socket. Did you forget to check
185 the return value of your socket() call? See L<perlfunc/accept>.
187 =item Allocation too large: %lx
189 (X) You can't allocate more than 64K on an MS-DOS machine.
191 =item Applying %s to %s will act on scalar(%s)
193 (W) The pattern match (//), substitution (s///), and transliteration (tr///)
194 operators work on scalar values. If you apply one of them to an array
195 or a hash, it will convert the array or hash to a scalar value -- the
196 length of an array, or the population info of a hash -- and then work on
197 that scalar value. This is probably not what you meant to do. See
198 L<perlfunc/grep> and L<perlfunc/map> for alternatives.
200 =item Arg too short for msgsnd
202 (F) msgsnd() requires a string at least as long as sizeof(long).
204 =item Ambiguous use of %s resolved as %s
206 (W)(S) You said something that may not be interpreted the way
207 you thought. Normally it's pretty easy to disambiguate it by supplying
208 a missing quote, operator, parenthesis pair or declaration.
210 =item Args must match #! line
212 (F) The setuid emulator requires that the arguments Perl was invoked
213 with match the arguments specified on the #! line. Since some systems
214 impose a one-argument limit on the #! line, try combining switches;
215 for example, turn C<-w -U> into C<-wU>.
217 =item Argument "%s" isn't numeric%s
219 (W) The indicated string was fed as an argument to an operator that
220 expected a numeric value instead. If you're fortunate the message
221 will identify which operator was so unfortunate.
223 =item Array @%s missing the @ in argument %d of %s()
225 (D) Really old Perl let you omit the @ on array names in some spots. This
226 is now heavily deprecated.
228 =item assertion botched: %s
230 (P) The malloc package that comes with Perl had an internal failure.
232 =item Assertion failed: file "%s"
234 (P) A general assertion failed. The file in question must be examined.
236 =item Assignment to both a list and a scalar
238 (F) If you assign to a conditional operator, the 2nd and 3rd arguments
239 must either both be scalars or both be lists. Otherwise Perl won't
240 know which context to supply to the right side.
242 =item Attempt to free non-arena SV: 0x%lx
244 (P) All SV objects are supposed to be allocated from arenas that will
245 be garbage collected on exit. An SV was discovered to be outside any
248 =item Attempt to free nonexistent shared string
250 (P) Perl maintains a reference counted internal table of strings to
251 optimize the storage and access of hash keys and other strings. This
252 indicates someone tried to decrement the reference count of a string
253 that can no longer be found in the table.
255 =item Attempt to free temp prematurely
257 (W) Mortalized values are supposed to be freed by the free_tmps()
258 routine. This indicates that something else is freeing the SV before
259 the free_tmps() routine gets a chance, which means that the free_tmps()
260 routine will be freeing an unreferenced scalar when it does try to free
263 =item Attempt to free unreferenced glob pointers
265 (P) The reference counts got screwed up on symbol aliases.
267 =item Attempt to free unreferenced scalar
269 (W) Perl went to decrement the reference count of a scalar to see if it
270 would go to 0, and discovered that it had already gone to 0 earlier,
271 and should have been freed, and in fact, probably was freed. This
272 could indicate that SvREFCNT_dec() was called too many times, or that
273 SvREFCNT_inc() was called too few times, or that the SV was mortalized
274 when it shouldn't have been, or that memory has been corrupted.
276 =item Attempt to pack pointer to temporary value
278 (W) You tried to pass a temporary value (like the result of a
279 function, or a computed expression) to the "p" pack() template. This
280 means the result contains a pointer to a location that could become
281 invalid anytime, even before the end of the current statement. Use
282 literals or global values as arguments to the "p" pack() template to
285 =item Attempt to use reference as lvalue in substr
287 (W) You supplied a reference as the first argument to substr() used
288 as an lvalue, which is pretty strange. Perhaps you forgot to
289 dereference it first. See L<perlfunc/substr>.
291 =item Bad arg length for %s, is %d, should be %d
293 (F) You passed a buffer of the wrong size to one of msgctl(), semctl() or
294 shmctl(). In C parlance, the correct sizes are, respectively,
295 S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and
296 S<sizeof(struct shmid_ds *)>.
298 =item Bad filehandle: %s
300 (F) A symbol was passed to something wanting a filehandle, but the symbol
301 has no filehandle associated with it. Perhaps you didn't do an open(), or
302 did it in another package.
304 =item Bad free() ignored
306 (S) An internal routine called free() on something that had never been
307 malloc()ed in the first place. Mandatory, but can be disabled by
308 setting environment variable C<PERL_BADFREE> to 1.
310 This message can be quite often seen with DB_File on systems with
311 "hard" dynamic linking, like C<AIX> and C<OS/2>. It is a bug of
312 C<Berkeley DB> which is left unnoticed if C<DB> uses I<forgiving>
317 (P) One of the internal hash routines was passed a null HV pointer.
319 =item Bad index while coercing array into hash
321 (F) A field name of a typed variable was looked up in the %FIELDS
322 hash, but the index found was not legal, i.e. less than 1.
324 =item Bad name after %s::
326 (F) You started to name a symbol by using a package prefix, and then didn't
327 finish the symbol. In particular, you can't interpolate outside of quotes,
336 $sym = "mypack::$var";
338 =item Bad symbol for array
340 (P) An internal request asked to add an array entry to something that
341 wasn't a symbol table entry.
343 =item Bad symbol for filehandle
345 (P) An internal request asked to add a filehandle entry to something that
346 wasn't a symbol table entry.
348 =item Bad symbol for hash
350 (P) An internal request asked to add a hash entry to something that
351 wasn't a symbol table entry.
353 =item Badly placed ()'s
355 (A) You've accidentally run your script through B<csh> instead
356 of Perl. Check the #! line, or manually feed your script into
359 =item Bareword "%s" not allowed while "strict subs" in use
361 (F) With "strict subs" in use, a bareword is only allowed as a
362 subroutine identifier, in curly braces or to the left of the "=>" symbol.
363 Perhaps you need to predeclare a subroutine?
365 =item Bareword "%s" refers to nonexistent package
367 (W) You used a qualified bareword of the form C<Foo::>, but
368 the compiler saw no other uses of that namespace before that point.
369 Perhaps you need to predeclare a package?
371 =item BEGIN failed--compilation aborted
373 (F) An untrapped exception was raised while executing a BEGIN subroutine.
374 Compilation stops immediately and the interpreter is exited.
376 =item BEGIN not safe after errors--compilation aborted
378 (F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which
379 implies a C<BEGIN {}>) after one or more compilation errors had
380 already occurred. Since the intended environment for the C<BEGIN {}>
381 could not be guaranteed (due to the errors), and since subsequent code
382 likely depends on its correct operation, Perl just gave up.
384 =item bind() on closed fd
386 (W) You tried to do a bind on a closed socket. Did you forget to check
387 the return value of your socket() call? See L<perlfunc/bind>.
389 =item Bizarre copy of %s in %s
391 (P) Perl detected an attempt to copy an internal value that is not copiable.
393 =item Callback called exit
395 (F) A subroutine invoked from an external package via perl_call_sv()
396 exited by calling exit.
398 =item Can't "goto" outside a block
400 (F) A "goto" statement was executed to jump out of what might look
401 like a block, except that it isn't a proper block. This usually
402 occurs if you tried to jump out of a sort() block or subroutine, which
403 is a no-no. See L<perlfunc/goto>.
405 =item Can't "goto" into the middle of a foreach loop
407 (F) A "goto" statement was executed to jump into the middle of a
408 foreach loop. You can't get there from here. See L<perlfunc/goto>.
410 =item Can't "last" outside a block
412 (F) A "last" statement was executed to break out of the current block,
413 except that there's this itty bitty problem called there isn't a
414 current block. Note that an "if" or "else" block doesn't count as a
415 "loopish" block, as doesn't a block given to sort(). You can usually double
416 the curlies to get the same effect though, because the inner curlies
417 will be considered a block that loops once. See L<perlfunc/last>.
419 =item Can't "next" outside a block
421 (F) A "next" statement was executed to reiterate the current block, but
422 there isn't a current block. Note that an "if" or "else" block doesn't
423 count as a "loopish" block, as doesn't a block given to sort(). You can
424 usually double the curlies to get the same effect though, because the inner
425 curlies will be considered a block that loops once. See L<perlfunc/next>.
427 =item Can't "redo" outside a block
429 (F) A "redo" statement was executed to restart the current block, but
430 there isn't a current block. Note that an "if" or "else" block doesn't
431 count as a "loopish" block, as doesn't a block given to sort(). You can
432 usually double the curlies to get the same effect though, because the inner
433 curlies will be considered a block that loops once. See L<perlfunc/redo>.
435 =item Can't bless non-reference value
437 (F) Only hard references may be blessed. This is how Perl "enforces"
438 encapsulation of objects. See L<perlobj>.
440 =item Can't break at that line
442 (S) A warning intended to only be printed while running within the debugger, indicating
443 the line number specified wasn't the location of a statement that could
446 =item Can't call method "%s" in empty package "%s"
448 (F) You called a method correctly, and it correctly indicated a package
449 functioning as a class, but that package doesn't have ANYTHING defined
450 in it, let alone methods. See L<perlobj>.
452 =item Can't call method "%s" on unblessed reference
454 (F) A method call must know in what package it's supposed to run. It
455 ordinarily finds this out from the object reference you supply, but
456 you didn't supply an object reference in this case. A reference isn't
457 an object reference until it has been blessed. See L<perlobj>.
459 =item Can't call method "%s" without a package or object reference
461 (F) You used the syntax of a method call, but the slot filled by the
462 object reference or package name contains an expression that returns
463 neither an object reference nor a package name. (Perhaps it's null?)
464 Something like this will reproduce the error:
467 process $BADREF 1,2,3;
468 $BADREF->process(1,2,3);
470 =item Can't chdir to %s
472 (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory
473 that you can chdir to, possibly because it doesn't exist.
475 =item Can't coerce %s to integer in %s
477 (F) Certain types of SVs, in particular real symbol table entries
478 (typeglobs), can't be forced to stop being what they are. So you can't
488 but then $foo no longer contains a glob.
490 =item Can't coerce %s to number in %s
492 (F) Certain types of SVs, in particular real symbol table entries
493 (typeglobs), can't be forced to stop being what they are.
495 =item Can't coerce %s to string in %s
497 (F) Certain types of SVs, in particular real symbol table entries
498 (typeglobs), can't be forced to stop being what they are.
500 =item Can't create pipe mailbox
502 (P) An error peculiar to VMS. The process is suffering from exhausted quotas
503 or other plumbing problems.
505 =item Can't declare %s in my
507 (F) Only scalar, array, and hash variables may be declared as lexical variables.
508 They must have ordinary identifiers as names.
510 =item Can't do inplace edit on %s: %s
512 (S) The creation of the new file failed for the indicated reason.
514 =item Can't do inplace edit without backup
516 (F) You're on a system such as MS-DOS that gets confused if you try reading
517 from a deleted (but still opened) file. You have to say C<-i.bak>, or some
520 =item Can't do inplace edit: %s E<gt> 14 characters
522 (S) There isn't enough room in the filename to make a backup name for the file.
524 =item Can't do inplace edit: %s is not a regular file
526 (S) You tried to use the B<-i> switch on a special file, such as a file in
527 /dev, or a FIFO. The file was ignored.
529 =item Can't do setegid!
531 (P) The setegid() call failed for some reason in the setuid emulator
534 =item Can't do seteuid!
536 (P) The setuid emulator of suidperl failed for some reason.
538 =item Can't do setuid
540 (F) This typically means that ordinary perl tried to exec suidperl to
541 do setuid emulation, but couldn't exec it. It looks for a name of the
542 form sperl5.000 in the same directory that the perl executable resides
543 under the name perl5.000, typically /usr/local/bin on Unix machines.
544 If the file is there, check the execute permissions. If it isn't, ask
545 your sysadmin why he and/or she removed it.
547 =item Can't do waitpid with flags
549 (F) This machine doesn't have either waitpid() or wait4(), so only waitpid()
550 without flags is emulated.
552 =item Can't do {n,m} with n E<gt> m
554 (F) Minima must be less than or equal to maxima. If you really want
555 your regexp to match something 0 times, just put {0}. See L<perlre>.
557 =item Can't emulate -%s on #! line
559 (F) The #! line specifies a switch that doesn't make sense at this point.
560 For example, it'd be kind of silly to put a B<-x> on the #! line.
562 =item Can't exec "%s": %s
564 (W) An system(), exec(), or piped open call could not execute the named
565 program for the indicated reason. Typical reasons include: the permissions
566 were wrong on the file, the file wasn't found in C<$ENV{PATH}>, the
567 executable in question was compiled for another architecture, or the
568 #! line in a script points to an interpreter that can't be run for
569 similar reasons. (Or maybe your system doesn't support #! at all.)
573 (F) Perl was trying to execute the indicated program for you because that's
574 what the #! line said. If that's not what you wanted, you may need to
575 mention "perl" on the #! line somewhere.
577 =item Can't execute %s
579 (F) You used the B<-S> switch, but the copies of the script to execute found
580 in the PATH did not have correct permissions.
582 =item Can't find %s on PATH, '.' not in PATH
584 (F) You used the B<-S> switch, but the script to execute could not be found
585 in the PATH, or at least not with the correct permissions. The script
586 exists in the current directory, but PATH prohibits running it.
588 =item Can't find %s on PATH
590 (F) You used the B<-S> switch, but the script to execute could not be found
593 =item Can't find label %s
595 (F) You said to goto a label that isn't mentioned anywhere that it's possible
596 for us to go to. See L<perlfunc/goto>.
598 =item Can't find string terminator %s anywhere before EOF
600 (F) Perl strings can stretch over multiple lines. This message means that
601 the closing delimiter was omitted. Because bracketed quotes count nesting
602 levels, the following is missing its final parenthesis:
604 print q(The character '(' starts a side comment.);
606 If you're getting this error from a here-document, you may have
607 included unseen whitespace before or after your closing tag. A good
608 programmer's editor will have a way to help you find these characters.
612 (F) A fatal error occurred while trying to fork while opening a pipeline.
614 =item Can't get filespec - stale stat buffer?
616 (S) A warning peculiar to VMS. This arises because of the difference between
617 access checks under VMS and under the Unix model Perl assumes. Under VMS,
618 access checks are done by filename, rather than by bits in the stat buffer, so
619 that ACLs and other protections can be taken into account. Unfortunately, Perl
620 assumes that the stat buffer contains all the necessary information, and passes
621 it, instead of the filespec, to the access checking routine. It will try to
622 retrieve the filespec using the device name and FID present in the stat buffer,
623 but this works only if you haven't made a subsequent call to the CRTL stat()
624 routine, because the device name is overwritten with each call. If this warning
625 appears, the name lookup failed, and the access checking routine gave up and
626 returned FALSE, just to be conservative. (Note: The access checking routine
627 knows about the Perl C<stat> operator and file tests, so you shouldn't ever
628 see this warning in response to a Perl command; it arises only if some internal
629 code takes stat buffers lightly.)
631 =item Can't get pipe mailbox device name
633 (P) An error peculiar to VMS. After creating a mailbox to act as a pipe, Perl
634 can't retrieve its name for later use.
636 =item Can't get SYSGEN parameter value for MAXBUF
638 (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
639 mailbox buffers to be, and didn't get an answer.
641 =item Can't goto subroutine outside a subroutine
643 (F) The deeply magical "goto subroutine" call can only replace one subroutine
644 call for another. It can't manufacture one out of whole cloth. In general
645 you should be calling it out of only an AUTOLOAD routine anyway. See
648 =item Can't goto subroutine from an eval-string
650 (F) The "goto subroutine" call can't be used to jump out of an eval "string".
651 (You can use it to jump out of an eval {BLOCK}, but you probably don't want to.)
653 =item Can't localize through a reference
655 (F) You said something like C<local $$ref>, which Perl can't currently
656 handle, because when it goes to restore the old value of whatever $ref
657 pointed to after the scope of the local() is finished, it can't be
658 sure that $ref will still be a reference.
660 =item Can't localize lexical variable %s
662 (F) You used local on a variable name that was previously declared as a
663 lexical variable using "my". This is not allowed. If you want to
664 localize a package variable of the same name, qualify it with the
667 =item Can't locate auto/%s.al in @INC
669 (F) A function (or method) was called in a package which allows autoload,
670 but there is no function to autoload. Most probable causes are a misprint
671 in a function/method name or a failure to C<AutoSplit> the file, say, by
672 doing C<make install>.
674 =item Can't locate %s in @INC
676 (F) You said to do (or require, or use) a file that couldn't be found
677 in any of the libraries mentioned in @INC. Perhaps you need to set the
678 PERL5LIB or PERL5OPT environment variable to say where the extra library
679 is, or maybe the script needs to add the library name to @INC. Or maybe
680 you just misspelled the name of the file. See L<perlfunc/require>.
682 =item Can't locate object method "%s" via package "%s"
684 (F) You called a method correctly, and it correctly indicated a package
685 functioning as a class, but that package doesn't define that particular
686 method, nor does any of its base classes. See L<perlobj>.
688 =item Can't locate package %s for @%s::ISA
690 (W) The @ISA array contained the name of another package that doesn't seem
693 =item Can't make list assignment to \%ENV on this system
695 (F) List assignment to %ENV is not supported on some systems, notably VMS.
697 =item Can't modify %s in %s
699 (F) You aren't allowed to assign to the item indicated, or otherwise try to
700 change it, such as with an auto-increment.
702 =item Can't modify nonexistent substring
704 (P) The internal routine that does assignment to a substr() was handed
707 =item Can't msgrcv to read-only var
709 (F) The target of a msgrcv must be modifiable to be used as a receive
712 =item Can't open %s: %s
714 (S) The implicit opening of a file through use of the C<E<lt>E<gt>>
715 filehandle, either implicitly under the C<-n> or C<-p> command-line
716 switches, or explicitly, failed for the indicated reason. Usually this
717 is because you don't have read permission for a file which you named
720 =item Can't open bidirectional pipe
722 (W) You tried to say C<open(CMD, "|cmd|")>, which is not supported. You can
723 try any of several modules in the Perl library to do this, such as
724 IPC::Open2. Alternately, direct the pipe's output to a file using "E<gt>",
725 and then read it in under a different file handle.
727 =item Can't open error file %s as stderr
729 (F) An error peculiar to VMS. Perl does its own command line redirection, and
730 couldn't open the file specified after '2E<gt>' or '2E<gt>E<gt>' on the
731 command line for writing.
733 =item Can't open input file %s as stdin
735 (F) An error peculiar to VMS. Perl does its own command line redirection, and
736 couldn't open the file specified after 'E<lt>' on the command line for reading.
738 =item Can't open output file %s as stdout
740 (F) An error peculiar to VMS. Perl does its own command line redirection, and
741 couldn't open the file specified after 'E<gt>' or 'E<gt>E<gt>' on the command
744 =item Can't open output pipe (name: %s)
746 (P) An error peculiar to VMS. Perl does its own command line redirection, and
747 couldn't open the pipe into which to send data destined for stdout.
749 =item Can't open perl script "%s": %s
751 (F) The script you specified can't be opened for the indicated reason.
753 =item Can't redefine active sort subroutine %s
755 (F) Perl optimizes the internal handling of sort subroutines and keeps
756 pointers into them. You tried to redefine one such sort subroutine when it
757 was currently active, which is not allowed. If you really want to do
758 this, you should write C<sort { &func } @x> instead of C<sort func @x>.
760 =item Can't rename %s to %s: %s, skipping file
762 (S) The rename done by the B<-i> switch failed for some reason, probably because
763 you don't have write permission to the directory.
765 =item Can't reopen input pipe (name: %s) in binary mode
767 (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried to
768 reopen it to accept binary data. Alas, it failed.
770 =item Can't reswap uid and euid
772 (P) The setreuid() call failed for some reason in the setuid emulator
775 =item Can't return outside a subroutine
777 (F) The return statement was executed in mainline code, that is, where
778 there was no subroutine call to return out of. See L<perlsub>.
780 =item Can't stat script "%s"
782 (P) For some reason you can't fstat() the script even though you have
783 it open already. Bizarre.
785 =item Can't swap uid and euid
787 (P) The setreuid() call failed for some reason in the setuid emulator
790 =item Can't take log of %g
792 (F) For ordinary real numbers, you can't take the logarithm of a
793 negative number or zero. There's a Math::Complex package that comes
794 standard with Perl, though, if you really want to do that for
795 the negative numbers.
797 =item Can't take sqrt of %g
799 (F) For ordinary real numbers, you can't take the square root of a
800 negative number. There's a Math::Complex package that comes standard
801 with Perl, though, if you really want to do that.
803 =item Can't undef active subroutine
805 (F) You can't undefine a routine that's currently running. You can,
806 however, redefine it while it's running, and you can even undef the
807 redefined subroutine while the old routine is running. Go figure.
811 (F) You tried to unshift an "unreal" array that can't be unshifted, such
812 as the main Perl stack.
814 =item Can't upgrade that kind of scalar
816 (P) The internal sv_upgrade routine adds "members" to an SV, making
817 it into a more specialized kind of SV. The top several SV types are
818 so specialized, however, that they cannot be interconverted. This
819 message indicates that such a conversion was attempted.
821 =item Can't upgrade to undef
823 (P) The undefined SV is the bottom of the totem pole, in the scheme
824 of upgradability. Upgrading to undef indicates an error in the
825 code calling sv_upgrade.
827 =item Can't use %%! because Errno.pm is not available
829 (F) The first time the %! hash is used, perl automatically loads the
830 Errno.pm module. The Errno module is expected to tie the %! hash to
831 provide symbolic names for C<$!> errno values.
833 =item Can't use "my %s" in sort comparison
835 (F) The global variables $a and $b are reserved for sort comparisons.
836 You mentioned $a or $b in the same line as the E<lt>=E<gt> or cmp operator,
837 and the variable had earlier been declared as a lexical variable.
838 Either qualify the sort variable with the package name, or rename the
841 =item Can't use %s for loop variable
843 (F) Only a simple scalar variable may be used as a loop variable on a foreach.
845 =item Can't use %s ref as %s ref
847 (F) You've mixed up your reference types. You have to dereference a
848 reference of the type needed. You can use the ref() function to
849 test the type of the reference, if need be.
851 =item Can't use \1 to mean $1 in expression
853 (W) In an ordinary expression, backslash is a unary operator that creates
854 a reference to its argument. The use of backslash to indicate a backreference
855 to a matched substring is valid only as part of a regular expression pattern.
856 Trying to do this in ordinary Perl code produces a value that prints
857 out looking like SCALAR(0xdecaf). Use the $1 form instead.
859 =item Can't use bareword ("%s") as %s ref while \"strict refs\" in use
861 (F) Only hard references are allowed by "strict refs". Symbolic references
862 are disallowed. See L<perlref>.
864 =item Can't use string ("%s") as %s ref while "strict refs" in use
866 (F) Only hard references are allowed by "strict refs". Symbolic references
867 are disallowed. See L<perlref>.
869 =item Can't use an undefined value as %s reference
871 (F) A value used as either a hard reference or a symbolic reference must
872 be a defined value. This helps to delurk some insidious errors.
874 =item Can't use global %s in "my"
876 (F) You tried to declare a magical variable as a lexical variable. This is
877 not allowed, because the magic can be tied to only one location (namely
878 the global variable) and it would be incredibly confusing to have
879 variables in your program that looked like magical variables but
882 =item Can't use subscript on %s
884 (F) The compiler tried to interpret a bracketed expression as a
885 subscript. But to the left of the brackets was an expression that
886 didn't look like an array reference, or anything else subscriptable.
888 =item Can't x= to read-only value
890 (F) You tried to repeat a constant value (often the undefined value) with
891 an assignment operator, which implies modifying the value itself.
892 Perhaps you need to copy the value to a temporary, and repeat that.
894 =item Cannot find an opnumber for "%s"
896 (F) A string of a form C<CORE::word> was given to prototype(), but
897 there is no builtin with the name C<word>.
899 =item Cannot resolve method `%s' overloading `%s' in package `%s'
901 (F|P) Error resolving overloading specified by a method name (as
902 opposed to a subroutine reference): no such method callable via the
903 package. If method name is C<???>, this is an internal error.
905 =item Character class syntax [. .] is reserved for future extensions
907 (W) Within regular expression character classes ([]) the syntax beginning
908 with "[." and ending with ".]" is reserved for future extensions.
909 If you need to represent those character sequences inside a regular
910 expression character class, just quote the square brackets with the
911 backslash: "\[." and ".\]".
913 =item Character class syntax [: :] is reserved for future extensions
915 (W) Within regular expression character classes ([]) the syntax beginning
916 with "[:" and ending with ":]" is reserved for future extensions.
917 If you need to represent those character sequences inside a regular
918 expression character class, just quote the square brackets with the
919 backslash: "\[:" and ":\]".
921 =item Character class syntax [= =] is reserved for future extensions
923 (W) Within regular expression character classes ([]) the syntax
924 beginning with "[=" and ending with "=]" is reserved for future extensions.
925 If you need to represent those character sequences inside a regular
926 expression character class, just quote the square brackets with the
927 backslash: "\[=" and "=\]".
929 =item chmod: mode argument is missing initial 0
931 (W) A novice will sometimes say
935 not realizing that 777 will be interpreted as a decimal number, equivalent
936 to 01411. Octal constants are introduced with a leading 0 in Perl, as in C.
938 =item Close on unopened file E<lt>%sE<gt>
940 (W) You tried to close a filehandle that was never opened.
942 =item Compilation failed in require
944 (F) Perl could not compile a file specified in a C<require> statement.
945 Perl uses this generic message when none of the errors that it encountered
946 were severe enough to halt compilation immediately.
948 =item connect() on closed fd
950 (W) You tried to do a connect on a closed socket. Did you forget to check
951 the return value of your socket() call? See L<perlfunc/connect>.
953 =item Constant subroutine %s redefined
955 (S) You redefined a subroutine which had previously been eligible for
956 inlining. See L<perlsub/"Constant Functions"> for commentary and
959 =item Constant subroutine %s undefined
961 (S) You undefined a subroutine which had previously been eligible for
962 inlining. See L<perlsub/"Constant Functions"> for commentary and
965 =item Copy method did not return a reference
967 (F) The method which overloads "=" is buggy. See L<overload/Copy Constructor>.
969 =item Corrupt malloc ptr 0x%lx at 0x%lx
971 (P) The malloc package that comes with Perl had an internal failure.
973 =item corrupted regexp pointers
975 (P) The regular expression engine got confused by what the regular
976 expression compiler gave it.
978 =item corrupted regexp program
980 (P) The regular expression engine got passed a regexp program without
981 a valid magic number.
983 =item Deep recursion on subroutine "%s"
985 (W) This subroutine has called itself (directly or indirectly) 100
986 times more than it has returned. This probably indicates an infinite
987 recursion, unless you're writing strange benchmark programs, in which
988 case it indicates something else.
990 =item Delimiter for here document is too long
992 (F) In a here document construct like C<E<lt>E<lt>FOO>, the label
993 C<FOO> is too long for Perl to handle. You have to be seriously
994 twisted to write code that triggers this error.
996 =item Did you mean &%s instead?
998 (W) You probably referred to an imported subroutine &FOO as $FOO or some such.
1000 =item Did you mean $ or @ instead of %?
1002 (W) You probably said %hash{$key} when you meant $hash{$key} or @hash{@keys}.
1003 On the other hand, maybe you just meant %hash and got carried away.
1007 (F) You passed die() an empty string (the equivalent of C<die "">) or
1008 you called it with no args and both C<$@> and C<$_> were empty.
1010 =item Do you need to predeclare %s?
1012 (S) This is an educated guess made in conjunction with the message "%s
1013 found where operator expected". It often means a subroutine or module
1014 name is being referenced that hasn't been declared yet. This may be
1015 because of ordering problems in your file, or because of a missing
1016 "sub", "package", "require", or "use" statement. If you're
1017 referencing something that isn't defined yet, you don't actually have
1018 to define the subroutine or package before the current location. You
1019 can use an empty "sub foo;" or "package FOO;" to enter a "forward"
1022 =item Don't know how to handle magic of type '%s'
1024 (P) The internal handling of magical variables has been cursed.
1026 =item do_study: out of memory
1028 (P) This should have been caught by safemalloc() instead.
1030 =item Duplicate free() ignored
1032 (S) An internal routine called free() on something that had already
1035 =item elseif should be elsif
1037 (S) There is no keyword "elseif" in Perl because Larry thinks it's
1038 ugly. Your code will be interpreted as an attempt to call a method
1039 named "elseif" for the class returned by the following block. This is
1040 unlikely to be what you want.
1042 =item END failed--cleanup aborted
1044 (F) An untrapped exception was raised while executing an END subroutine.
1045 The interpreter is immediately exited.
1047 =item Error converting file specification %s
1049 (F) An error peculiar to VMS. Because Perl may have to deal with file
1050 specifications in either VMS or Unix syntax, it converts them to a
1051 single form when it must operate on them directly. Either you've
1052 passed an invalid file specification to Perl, or you've found a
1053 case the conversion routines don't handle. Drat.
1055 =item Excessively long <> operator
1057 (F) The contents of a <> operator may not exceed the maximum size of a
1058 Perl identifier. If you're just trying to glob a long list of
1059 filenames, try using the glob() operator, or put the filenames into a
1060 variable and glob that.
1062 =item Execution of %s aborted due to compilation errors
1064 (F) The final summary message when a Perl compilation fails.
1066 =item Exiting eval via %s
1068 (W) You are exiting an eval by unconventional means, such as
1069 a goto, or a loop control statement.
1071 =item Exiting pseudo-block via %s
1073 (W) You are exiting a rather special block construct (like a sort block or
1074 subroutine) by unconventional means, such as a goto, or a loop control
1075 statement. See L<perlfunc/sort>.
1077 =item Exiting subroutine via %s
1079 (W) You are exiting a subroutine by unconventional means, such as
1080 a goto, or a loop control statement.
1082 =item Exiting substitution via %s
1084 (W) You are exiting a substitution by unconventional means, such as
1085 a return, a goto, or a loop control statement.
1087 =item Explicit blessing to '' (assuming package main)
1089 (W) You are blessing a reference to a zero length string. This has
1090 the effect of blessing the reference into the package main. This is
1091 usually not what you want. Consider providing a default target
1092 package, e.g. bless($ref, $p or 'MyPackage');
1094 =item Fatal VMS error at %s, line %d
1096 (P) An error peculiar to VMS. Something untoward happened in a VMS system
1097 service or RTL routine; Perl's exit status should provide more details. The
1098 filename in "at %s" and the line number in "line %d" tell you which section of
1099 the Perl source code is distressed.
1101 =item fcntl is not implemented
1103 (F) Your machine apparently doesn't implement fcntl(). What is this, a
1104 PDP-11 or something?
1106 =item Filehandle %s never opened
1108 (W) An I/O operation was attempted on a filehandle that was never initialized.
1109 You need to do an open() or a socket() call, or call a constructor from
1110 the FileHandle package.
1112 =item Filehandle %s opened for only input
1114 (W) You tried to write on a read-only filehandle. If you
1115 intended it to be a read-write filehandle, you needed to open it with
1116 "+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If
1117 you intended only to write the file, use "E<gt>" or "E<gt>E<gt>". See
1120 =item Filehandle opened for only input
1122 (W) You tried to write on a read-only filehandle. If you
1123 intended it to be a read-write filehandle, you needed to open it with
1124 "+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If
1125 you intended only to write the file, use "E<gt>" or "E<gt>E<gt>". See
1128 =item Final $ should be \$ or $name
1130 (F) You must now decide whether the final $ in a string was meant to be
1131 a literal dollar sign, or was meant to introduce a variable name
1132 that happens to be missing. So you have to put either the backslash or
1135 =item Final @ should be \@ or @name
1137 (F) You must now decide whether the final @ in a string was meant to be
1138 a literal "at" sign, or was meant to introduce a variable name
1139 that happens to be missing. So you have to put either the backslash or
1142 =item Format %s redefined
1144 (W) You redefined a format. To suppress this warning, say
1148 eval "format NAME =...";
1151 =item Format not terminated
1153 (F) A format must be terminated by a line with a solitary dot. Perl got
1154 to the end of your file without finding such a line.
1156 =item Found = in conditional, should be ==
1166 (or something like that).
1168 =item gdbm store returned %d, errno %d, key "%s"
1170 (S) A warning from the GDBM_File extension that a store failed.
1172 =item gethostent not implemented
1174 (F) Your C library apparently doesn't implement gethostent(), probably
1175 because if it did, it'd feel morally obligated to return every hostname
1178 =item get{sock,peer}name() on closed fd
1180 (W) You tried to get a socket or peer socket name on a closed socket.
1181 Did you forget to check the return value of your socket() call?
1183 =item getpwnam returned invalid UIC %#o for user "%s"
1185 (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
1186 C<getpwnam> operator returned an invalid UIC.
1189 =item Glob not terminated
1191 (F) The lexer saw a left angle bracket in a place where it was expecting
1192 a term, so it's looking for the corresponding right angle bracket, and not
1193 finding it. Chances are you left some needed parentheses out earlier in
1194 the line, and you really meant a "less than".
1196 =item Global symbol "%s" requires explicit package name
1198 (F) You've said "use strict vars", which indicates that all variables
1199 must either be lexically scoped (using "my"), or explicitly qualified to
1200 say which package the global variable is in (using "::").
1202 =item goto must have label
1204 (F) Unlike with "next" or "last", you're not allowed to goto an
1205 unspecified destination. See L<perlfunc/goto>.
1207 =item Had to create %s unexpectedly
1209 (S) A routine asked for a symbol from a symbol table that ought to have
1210 existed already, but for some reason it didn't, and had to be created on
1211 an emergency basis to prevent a core dump.
1213 =item Hash %%s missing the % in argument %d of %s()
1215 (D) Really old Perl let you omit the % on hash names in some spots. This
1216 is now heavily deprecated.
1218 =item Identifier too long
1220 (F) Perl limits identifiers (names for variables, functions, etc.) to
1221 about 250 characters for simple names, and somewhat more for compound
1222 names (like C<$A::B>). You've exceeded Perl's limits. Future
1223 versions of Perl are likely to eliminate these arbitrary limitations.
1225 =item Ill-formed logical name |%s| in prime_env_iter
1227 (W) A warning peculiar to VMS. A logical name was encountered when preparing
1228 to iterate over %ENV which violates the syntactic rules governing logical
1229 names. Because it cannot be translated normally, it is skipped, and will not
1230 appear in %ENV. This may be a benign occurrence, as some software packages
1231 might directly modify logical name tables and introduce nonstandard names,
1232 or it may indicate that a logical name table has been corrupted.
1234 =item Illegal character %s (carriage return)
1236 (F) A carriage return character was found in the input. This is an
1237 error, and not a warning, because carriage return characters can break
1238 multi-line strings, including here documents (e.g., C<print E<lt>E<lt>EOF;>).
1240 Under Unix, this error is usually caused by executing Perl code --
1241 either the main program, a module, or an eval'd string -- that was
1242 transferred over a network connection from a non-Unix system without
1243 properly converting the text file format.
1245 Under systems that use something other than '\n' to delimit lines of
1246 text, this error can also be caused by reading Perl code from a file
1247 handle that is in binary mode (as set by the C<binmode> operator).
1249 In either case, the Perl code in question will probably need to be
1250 converted with something like C<s/\x0D\x0A?/\n/g> before it can be
1253 =item Illegal division by zero
1255 (F) You tried to divide a number by 0. Either something was wrong in your
1256 logic, or you need to put a conditional in to guard against meaningless input.
1258 =item Illegal modulus zero
1260 (F) You tried to divide a number by 0 to get the remainder. Most numbers
1261 don't take to this kindly.
1263 =item Illegal octal digit
1265 (F) You used an 8 or 9 in a octal number.
1267 =item Illegal octal digit ignored
1269 (W) You may have tried to use an 8 or 9 in a octal number. Interpretation
1270 of the octal number stopped before the 8 or 9.
1272 =item Illegal hex digit ignored
1274 (W) You may have tried to use a character other than 0 - 9 or A - F in a
1275 hexadecimal number. Interpretation of the hexadecimal number stopped
1276 before the illegal character.
1278 =item Illegal switch in PERL5OPT: %s
1280 (X) The PERL5OPT environment variable may only be used to set the
1281 following switches: B<-[DIMUdmw]>.
1283 =item In string, @%s now must be written as \@%s
1285 (F) It used to be that Perl would try to guess whether you wanted an
1286 array interpolated or a literal @. It did this when the string was first
1287 used at runtime. Now strings are parsed at compile time, and ambiguous
1288 instances of @ must be disambiguated, either by prepending a backslash to
1289 indicate a literal, or by declaring (or using) the array within the
1290 program before the string (lexically). (Someday it will simply assume
1291 that an unbackslashed @ interpolates an array.)
1293 =item Insecure dependency in %s
1295 (F) You tried to do something that the tainting mechanism didn't like.
1296 The tainting mechanism is turned on when you're running setuid or setgid,
1297 or when you specify B<-T> to turn it on explicitly. The tainting mechanism
1298 labels all data that's derived directly or indirectly from the user,
1299 who is considered to be unworthy of your trust. If any such data is
1300 used in a "dangerous" operation, you get this error. See L<perlsec>
1301 for more information.
1303 =item Insecure directory in %s
1305 (F) You can't use system(), exec(), or a piped open in a setuid or setgid
1306 script if C<$ENV{PATH}> contains a directory that is writable by the world.
1309 =item Insecure $ENV{%s} while running %s
1311 (F) You can't use system(), exec(), or a piped open in a setuid or
1312 setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
1313 C<$ENV{ENV}> or C<$ENV{BASH_ENV}> are derived from data supplied (or
1314 potentially supplied) by the user. The script must set the path to a
1315 known value, using trustworthy data. See L<perlsec>.
1317 =item Integer overflow in hex number
1319 (S) The literal hex number you have specified is too big for your
1320 architecture. On a 32-bit architecture the largest hex literal is
1323 =item Integer overflow in octal number
1325 (S) The literal octal number you have specified is too big for your
1326 architecture. On a 32-bit architecture the largest octal literal is
1329 =item Internal inconsistency in tracking vforks
1331 (S) A warning peculiar to VMS. Perl keeps track of the number
1332 of times you've called C<fork> and C<exec>, to determine
1333 whether the current call to C<exec> should affect the current
1334 script or a subprocess (see L<perlvms/exec>). Somehow, this count
1335 has become scrambled, so Perl is making a guess and treating
1336 this C<exec> as a request to terminate the Perl script
1337 and execute the specified command.
1339 =item internal disaster in regexp
1341 (P) Something went badly wrong in the regular expression parser.
1343 =item internal error: glob failed
1345 (P) Something went wrong with the external program(s) used for C<glob>
1346 and C<E<lt>*.cE<gt>>. This may mean that your csh (C shell) is
1347 broken. If so, you should change all of the csh-related variables in
1348 config.sh: If you have tcsh, make the variables refer to it as if it
1349 were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all
1350 empty (except that C<d_csh> should be C<'undef'>) so that Perl will
1351 think csh is missing. In either case, after editing config.sh, run
1352 C<./Configure -S> and rebuild Perl.
1354 =item internal urp in regexp at /%s/
1356 (P) Something went badly awry in the regular expression parser.
1358 =item invalid [] range in regexp
1360 (F) The range specified in a character class had a minimum character
1361 greater than the maximum character. See L<perlre>.
1363 =item Invalid conversion in %s: "%s"
1365 (W) Perl does not understand the given format conversion.
1366 See L<perlfunc/sprintf>.
1368 =item Invalid type in pack: '%s'
1370 (F) The given character is not a valid pack type. See L<perlfunc/pack>.
1371 (W) The given character is not a valid pack type but used to be silently
1374 =item Invalid type in unpack: '%s'
1376 (F) The given character is not a valid unpack type. See L<perlfunc/unpack>.
1377 (W) The given character is not a valid unpack type but used to be silently
1380 =item ioctl is not implemented
1382 (F) Your machine apparently doesn't implement ioctl(), which is pretty
1383 strange for a machine that supports C.
1385 =item junk on end of regexp
1387 (P) The regular expression parser is confused.
1389 =item Label not found for "last %s"
1391 (F) You named a loop to break out of, but you're not currently in a
1392 loop of that name, not even if you count where you were called from.
1393 See L<perlfunc/last>.
1395 =item Label not found for "next %s"
1397 (F) You named a loop to continue, but you're not currently in a loop of
1398 that name, not even if you count where you were called from. See
1401 =item Label not found for "redo %s"
1403 (F) You named a loop to restart, but you're not currently in a loop of
1404 that name, not even if you count where you were called from. See
1407 =item listen() on closed fd
1409 (W) You tried to do a listen on a closed socket. Did you forget to check
1410 the return value of your socket() call? See L<perlfunc/listen>.
1412 =item Method for operation %s not found in package %s during blessing
1414 (F) An attempt was made to specify an entry in an overloading table that
1415 doesn't resolve to a valid subroutine. See L<overload>.
1417 =item Might be a runaway multi-line %s string starting on line %d
1419 (S) An advisory indicating that the previous error may have been caused
1420 by a missing delimiter on a string or pattern, because it eventually
1421 ended earlier on the current line.
1423 =item Misplaced _ in number
1425 (W) An underline in a decimal constant wasn't on a 3-digit boundary.
1427 =item Missing $ on loop variable
1429 (F) Apparently you've been programming in B<csh> too much. Variables are always
1430 mentioned with the $ in Perl, unlike in the shells, where it can vary from
1431 one line to the next.
1433 =item Missing comma after first argument to %s function
1435 (F) While certain functions allow you to specify a filehandle or an
1436 "indirect object" before the argument list, this ain't one of them.
1438 =item Missing operator before %s?
1440 (S) This is an educated guess made in conjunction with the message "%s
1441 found where operator expected". Often the missing operator is a comma.
1443 =item Missing right bracket
1445 (F) The lexer counted more opening curly brackets (braces) than closing ones.
1446 As a general rule, you'll find it's missing near the place you were last
1449 =item Modification of a read-only value attempted
1451 (F) You tried, directly or indirectly, to change the value of a
1452 constant. You didn't, of course, try "2 = 1", because the compiler
1453 catches that. But an easy way to do the same thing is:
1455 sub mod { $_[0] = 1 }
1458 Another way is to assign to a substr() that's off the end of the string.
1460 =item Modification of noncreatable array value attempted, subscript %d
1462 (F) You tried to make an array value spring into existence, and the
1463 subscript was probably negative, even counting from end of the array
1466 =item Modification of noncreatable hash value attempted, subscript "%s"
1468 (F) You tried to make a hash value spring into existence, and it couldn't
1469 be created for some peculiar reason.
1471 =item Module name must be constant
1473 (F) Only a bare module name is allowed as the first argument to a "use".
1475 =item msg%s not implemented
1477 (F) You don't have System V message IPC on your system.
1479 =item Multidimensional syntax %s not supported
1481 (W) Multidimensional arrays aren't written like C<$foo[1,2,3]>. They're written
1482 like C<$foo[1][2][3]>, as in C.
1484 =item Name "%s::%s" used only once: possible typo
1486 (W) Typographical errors often show up as unique variable names.
1487 If you had a good reason for having a unique name, then just mention
1488 it again somehow to suppress the message. The C<use vars> pragma is
1489 provided for just this purpose.
1491 =item Negative length
1493 (F) You tried to do a read/write/send/recv operation with a buffer length
1494 that is less than 0. This is difficult to imagine.
1496 =item nested *?+ in regexp
1498 (F) You can't quantify a quantifier without intervening parentheses. So
1499 things like ** or +* or ?* are illegal.
1501 Note, however, that the minimal matching quantifiers, C<*?>, C<+?>, and C<??> appear
1502 to be nested quantifiers, but aren't. See L<perlre>.
1506 (F) The setuid emulator requires that scripts have a well-formed #! line
1507 even on machines that don't support the #! construct.
1509 =item No %s allowed while running setuid
1511 (F) Certain operations are deemed to be too insecure for a setuid or setgid
1512 script to even be allowed to attempt. Generally speaking there will be
1513 another way to do what you want that is, if not secure, at least securable.
1516 =item No B<-e> allowed in setuid scripts
1518 (F) A setuid script can't be specified by the user.
1520 =item No comma allowed after %s
1522 (F) A list operator that has a filehandle or "indirect object" is not
1523 allowed to have a comma between that and the following arguments.
1524 Otherwise it'd be just another one of the arguments.
1526 One possible cause for this is that you expected to have imported a
1527 constant to your name space with B<use> or B<import> while no such
1528 importing took place, it may for example be that your operating system
1529 does not support that particular constant. Hopefully you did use an
1530 explicit import list for the constants you expect to see, please see
1531 L<perlfunc/use> and L<perlfunc/import>. While an explicit import list
1532 would probably have caught this error earlier it naturally does not
1533 remedy the fact that your operating system still does not support that
1534 constant. Maybe you have a typo in the constants of the symbol import
1535 list of B<use> or B<import> or in the constant name at the line where
1536 this error was triggered?
1538 =item No command into which to pipe on command line
1540 (F) An error peculiar to VMS. Perl handles its own command line redirection,
1541 and found a '|' at the end of the command line, so it doesn't know where you
1542 want to pipe the output from this command.
1544 =item No DB::DB routine defined
1546 (F) The currently executing code was compiled with the B<-d> switch,
1547 but for some reason the perl5db.pl file (or some facsimile thereof)
1548 didn't define a routine to be called at the beginning of each
1549 statement. Which is odd, because the file should have been required
1550 automatically, and should have blown up the require if it didn't parse
1553 =item No dbm on this machine
1555 (P) This is counted as an internal error, because every machine should
1556 supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
1558 =item No DBsub routine
1560 (F) The currently executing code was compiled with the B<-d> switch,
1561 but for some reason the perl5db.pl file (or some facsimile thereof)
1562 didn't define a DB::sub routine to be called at the beginning of each
1563 ordinary subroutine call.
1565 =item No error file after 2E<gt> or 2E<gt>E<gt> on command line
1567 (F) An error peculiar to VMS. Perl handles its own command line redirection,
1568 and found a '2E<gt>' or a '2E<gt>E<gt>' on the command line, but can't find
1569 the name of the file to which to write data destined for stderr.
1571 =item No input file after E<lt> on command line
1573 (F) An error peculiar to VMS. Perl handles its own command line redirection,
1574 and found a 'E<lt>' on the command line, but can't find the name of the file
1575 from which to read data for stdin.
1577 =item No output file after E<gt> on command line
1579 (F) An error peculiar to VMS. Perl handles its own command line redirection,
1580 and found a lone 'E<gt>' at the end of the command line, so it doesn't know
1581 where you wanted to redirect stdout.
1583 =item No output file after E<gt> or E<gt>E<gt> on command line
1585 (F) An error peculiar to VMS. Perl handles its own command line redirection,
1586 and found a 'E<gt>' or a 'E<gt>E<gt>' on the command line, but can't find the
1587 name of the file to which to write data destined for stdout.
1589 =item No Perl script found in input
1591 (F) You called C<perl -x>, but no line was found in the file beginning
1592 with #! and containing the word "perl".
1594 =item No setregid available
1596 (F) Configure didn't find anything resembling the setregid() call for
1599 =item No setreuid available
1601 (F) Configure didn't find anything resembling the setreuid() call for
1604 =item No space allowed after B<-I>
1606 (F) The argument to B<-I> must follow the B<-I> immediately with no
1609 =item No such field "%s" in variable %s of type %s
1611 (F) You tried to access a field of a typed variable where the type
1612 does not know about the field name. The field names are looked up in
1613 the %FIELDS hash in the type package at compile time. The %FIELDS hash
1614 is usually set up with the 'fields' pragma.
1616 =item No such pipe open
1618 (P) An error peculiar to VMS. The internal routine my_pclose() tried to
1619 close a pipe which hadn't been opened. This should have been caught earlier as
1620 an attempt to close an unopened filehandle.
1622 =item No such signal: SIG%s
1624 (W) You specified a signal name as a subscript to %SIG that was not recognized.
1625 Say C<kill -l> in your shell to see the valid signal names on your system.
1627 =item Not a CODE reference
1629 (F) Perl was trying to evaluate a reference to a code value (that is, a
1630 subroutine), but found a reference to something else instead. You can
1631 use the ref() function to find out what kind of ref it really was.
1632 See also L<perlref>.
1634 =item Not a format reference
1636 (F) I'm not sure how you managed to generate a reference to an anonymous
1637 format, but this indicates you did, and that it didn't exist.
1639 =item Not a GLOB reference
1641 (F) Perl was trying to evaluate a reference to a "typeglob" (that is,
1642 a symbol table entry that looks like C<*foo>), but found a reference to
1643 something else instead. You can use the ref() function to find out
1644 what kind of ref it really was. See L<perlref>.
1646 =item Not a HASH reference
1648 (F) Perl was trying to evaluate a reference to a hash value, but
1649 found a reference to something else instead. You can use the ref()
1650 function to find out what kind of ref it really was. See L<perlref>.
1652 =item Not a perl script
1654 (F) The setuid emulator requires that scripts have a well-formed #! line
1655 even on machines that don't support the #! construct. The line must
1658 =item Not a SCALAR reference
1660 (F) Perl was trying to evaluate a reference to a scalar value, but
1661 found a reference to something else instead. You can use the ref()
1662 function to find out what kind of ref it really was. See L<perlref>.
1664 =item Not a subroutine reference
1666 (F) Perl was trying to evaluate a reference to a code value (that is, a
1667 subroutine), but found a reference to something else instead. You can
1668 use the ref() function to find out what kind of ref it really was.
1669 See also L<perlref>.
1671 =item Not a subroutine reference in overload table
1673 (F) An attempt was made to specify an entry in an overloading table that
1674 doesn't somehow point to a valid subroutine. See L<overload>.
1676 =item Not an ARRAY reference
1678 (F) Perl was trying to evaluate a reference to an array value, but
1679 found a reference to something else instead. You can use the ref()
1680 function to find out what kind of ref it really was. See L<perlref>.
1682 =item Not enough arguments for %s
1684 (F) The function requires more arguments than you specified.
1686 =item Not enough format arguments
1688 (W) A format specified more picture fields than the next line supplied.
1691 =item Null filename used
1693 (F) You can't require the null filename, especially because on many machines
1694 that means the current directory! See L<perlfunc/require>.
1696 =item Null picture in formline
1698 (F) The first argument to formline must be a valid format picture
1699 specification. It was found to be empty, which probably means you
1700 supplied it an uninitialized value. See L<perlform>.
1702 =item NULL OP IN RUN
1704 (P) Some internal routine called run() with a null opcode pointer.
1708 (P) An attempt was made to realloc NULL.
1710 =item NULL regexp argument
1712 (P) The internal pattern matching routines blew it big time.
1714 =item NULL regexp parameter
1716 (P) The internal pattern matching routines are out of their gourd.
1718 =item Number too long
1720 (F) Perl limits the representation of decimal numbers in programs to about
1721 about 250 characters. You've exceeded that length. Future versions of
1722 Perl are likely to eliminate this arbitrary limitation. In the meantime,
1723 try using scientific notation (e.g. "1e6" instead of "1_000_000").
1725 =item Odd number of elements in hash assignment
1727 (S) You specified an odd number of elements to initialize a hash, which
1728 is odd, because hashes come in key/value pairs.
1730 =item Offset outside string
1732 (F) You tried to do a read/write/send/recv operation with an offset
1733 pointing outside the buffer. This is difficult to imagine.
1734 The sole exception to this is that C<sysread()>ing past the buffer
1735 will extend the buffer and zero pad the new area.
1739 (S) An internal warning that the grammar is screwed up.
1743 (S) An internal warning that the grammar is screwed up.
1745 =item Operation `%s': no method found,%s
1747 (F) An attempt was made to perform an overloaded operation for which
1748 no handler was defined. While some handlers can be autogenerated in
1749 terms of other handlers, there is no default handler for any
1750 operation, unless C<fallback> overloading key is specified to be
1751 true. See L<overload>.
1753 =item Operator or semicolon missing before %s
1755 (S) You used a variable or subroutine call where the parser was
1756 expecting an operator. The parser has assumed you really meant
1757 to use an operator, but this is highly likely to be incorrect.
1758 For example, if you say "*foo *foo" it will be interpreted as
1759 if you said "*foo * 'foo'".
1761 =item Out of memory for yacc stack
1763 (F) The yacc parser wanted to grow its stack so it could continue parsing,
1764 but realloc() wouldn't give it more memory, virtual or otherwise.
1766 =item Out of memory during request for %s
1768 (X|F) The malloc() function returned 0, indicating there was insufficient
1769 remaining memory (or virtual memory) to satisfy the request.
1771 The request was judged to be small, so the possibility to trap it
1772 depends on the way perl was compiled. By default it is not trappable.
1773 However, if compiled for this, Perl may use the contents of C<$^M> as
1774 an emergency pool after die()ing with this message. In this case the
1775 error is trappable I<once>.
1777 =item Out of memory during "large" request for %s
1779 (F) The malloc() function returned 0, indicating there was insufficient
1780 remaining memory (or virtual memory) to satisfy the request. However,
1781 the request was judged large enough (compile-time default is 64K), so
1782 a possibility to shut down by trapping this error is granted.
1784 =item Out of memory during ridiculously large request
1786 (F) You can't allocate more than 2^31+"small amount" bytes. This error
1787 is most likely to be caused by a typo in the Perl program. e.g., C<$arr[time]>
1788 instead of C<$arr[$time]>.
1792 (W) A single call to write() produced more lines than can fit on a page.
1795 =item panic: ck_grep
1797 (P) Failed an internal consistency check trying to compile a grep.
1799 =item panic: ck_split
1801 (P) Failed an internal consistency check trying to compile a split.
1803 =item panic: corrupt saved stack index
1805 (P) The savestack was requested to restore more localized values than there
1806 are in the savestack.
1810 (P) We popped the context stack to an eval context, and then discovered
1811 it wasn't an eval context.
1813 =item panic: do_match
1815 (P) The internal pp_match() routine was called with invalid operational data.
1817 =item panic: do_split
1819 (P) Something terrible went wrong in setting up for the split.
1821 =item panic: do_subst
1823 (P) The internal pp_subst() routine was called with invalid operational data.
1825 =item panic: do_trans
1827 (P) The internal do_trans() routine was called with invalid operational data.
1831 (P) The library function frexp() failed, making printf("%f") impossible.
1835 (P) We popped the context stack to a context with the specified label,
1836 and then discovered it wasn't a context we know how to do a goto in.
1838 =item panic: INTERPCASEMOD
1840 (P) The lexer got into a bad state at a case modifier.
1842 =item panic: INTERPCONCAT
1844 (P) The lexer got into a bad state parsing a string with brackets.
1848 (P) We popped the context stack to a block context, and then discovered
1849 it wasn't a block context.
1851 =item panic: leave_scope clearsv
1853 (P) A writable lexical variable became read-only somehow within the scope.
1855 =item panic: leave_scope inconsistency
1857 (P) The savestack probably got out of sync. At least, there was an
1858 invalid enum on the top of it.
1862 (P) Something requested a negative number of bytes of malloc.
1864 =item panic: mapstart
1866 (P) The compiler is screwed up with respect to the map() function.
1868 =item panic: null array
1870 (P) One of the internal array routines was passed a null AV pointer.
1872 =item panic: pad_alloc
1874 (P) The compiler got confused about which scratch pad it was allocating
1875 and freeing temporaries and lexicals from.
1877 =item panic: pad_free curpad
1879 (P) The compiler got confused about which scratch pad it was allocating
1880 and freeing temporaries and lexicals from.
1882 =item panic: pad_free po
1884 (P) An invalid scratch pad offset was detected internally.
1886 =item panic: pad_reset curpad
1888 (P) The compiler got confused about which scratch pad it was allocating
1889 and freeing temporaries and lexicals from.
1891 =item panic: pad_sv po
1893 (P) An invalid scratch pad offset was detected internally.
1895 =item panic: pad_swipe curpad
1897 (P) The compiler got confused about which scratch pad it was allocating
1898 and freeing temporaries and lexicals from.
1900 =item panic: pad_swipe po
1902 (P) An invalid scratch pad offset was detected internally.
1904 =item panic: pp_iter
1906 (P) The foreach iterator got called in a non-loop context frame.
1908 =item panic: realloc
1910 (P) Something requested a negative number of bytes of realloc.
1912 =item panic: restartop
1914 (P) Some internal routine requested a goto (or something like it), and
1915 didn't supply the destination.
1919 (P) We popped the context stack to a subroutine or eval context, and
1920 then discovered it wasn't a subroutine or eval context.
1922 =item panic: scan_num
1924 (P) scan_num() got called on something that wasn't a number.
1926 =item panic: sv_insert
1928 (P) The sv_insert() routine was told to remove more string than there
1931 =item panic: top_env
1933 (P) The compiler attempted to do a goto, or something weird like that.
1937 (P) The lexer got into a bad state while processing a case modifier.
1939 =item Parentheses missing around "%s" list
1941 (W) You said something like
1947 my ($foo, $bar) = @_;
1949 Remember that "my" and "local" bind closer than comma.
1951 =item Perl %3.3f required--this is only version %s, stopped
1953 (F) The module in question uses features of a version of Perl more recent
1954 than the currently running version. How long has it been since you upgraded,
1955 anyway? See L<perlfunc/require>.
1957 =item Permission denied
1959 (F) The setuid emulator in suidperl decided you were up to no good.
1961 =item pid %d not a child
1963 (W) A warning peculiar to VMS. Waitpid() was asked to wait for a process which
1964 isn't a subprocess of the current process. While this is fine from VMS'
1965 perspective, it's probably not what you intended.
1967 =item POSIX getpgrp can't take an argument
1969 (F) Your C compiler uses POSIX getpgrp(), which takes no argument, unlike
1970 the BSD version, which takes a pid.
1972 =item Possible attempt to put comments in qw() list
1974 (W) qw() lists contain items separated by whitespace; as with literal
1975 strings, comment characters are not ignored, but are instead treated
1976 as literal data. (You may have used different delimiters than the
1977 parentheses shown here; braces are also frequently used.)
1979 You probably wrote something like this:
1986 when you should have written this:
1993 If you really want comments, build your list the
1994 old-fashioned way, with quotes and commas:
1998 'b', # another comment
2001 =item Possible attempt to separate words with commas
2003 (W) qw() lists contain items separated by whitespace; therefore commas
2004 aren't needed to separate the items. (You may have used different
2005 delimiters than the parentheses shown here; braces are also frequently
2008 You probably wrote something like this:
2012 which puts literal commas into some of the list items. Write it without
2013 commas if you don't want them to appear in your data:
2017 =item Possible memory corruption: %s overflowed 3rd argument
2019 (F) An ioctl() or fcntl() returned more than Perl was bargaining for.
2020 Perl guesses a reasonable buffer size, but puts a sentinel byte at the
2021 end of the buffer just in case. This sentinel byte got clobbered, and
2022 Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>.
2024 =item Precedence problem: open %s should be open(%s)
2026 (S) The old irregular construct
2030 is now misinterpreted as
2034 because of the strict regularization of Perl 5's grammar into unary
2035 and list operators. (The old open was a little of both.) You must
2036 put parentheses around the filehandle, or use the new "or" operator
2039 =item print on closed filehandle %s
2041 (W) The filehandle you're printing on got itself closed sometime before now.
2042 Check your logic flow.
2044 =item printf on closed filehandle %s
2046 (W) The filehandle you're writing to got itself closed sometime before now.
2047 Check your logic flow.
2049 =item Probable precedence problem on %s
2051 (W) The compiler found a bareword where it expected a conditional,
2052 which often indicates that an || or && was parsed as part of the
2053 last argument of the previous construct, for example:
2057 =item Prototype mismatch: %s vs %s
2059 (S) The subroutine being declared or defined had previously been declared
2060 or defined with a different function prototype.
2062 =item Range iterator outside integer range
2064 (F) One (or both) of the numeric arguments to the range operator ".."
2065 are outside the range which can be represented by integers internally.
2066 One possible workaround is to force Perl to use magical string
2067 increment by prepending "0" to your numbers.
2069 =item Read on closed filehandle E<lt>%sE<gt>
2071 (W) The filehandle you're reading from got itself closed sometime before now.
2072 Check your logic flow.
2074 =item Reallocation too large: %lx
2076 (F) You can't allocate more than 64K on an MS-DOS machine.
2078 =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch
2080 (F) You can't use the B<-D> option unless the code to produce the
2081 desired output is compiled into Perl, which entails some overhead,
2082 which is why it's currently left out of your copy.
2084 =item Recursive inheritance detected in package '%s'
2086 (F) More than 100 levels of inheritance were used. Probably indicates
2087 an unintended loop in your inheritance hierarchy.
2089 =item Recursive inheritance detected while looking for method '%s' in package '%s'
2091 (F) More than 100 levels of inheritance were encountered while invoking a
2092 method. Probably indicates an unintended loop in your inheritance hierarchy.
2094 =item Reference found where even-sized list expected
2096 (W) You gave a single reference where Perl was expecting a list with
2097 an even number of elements (for assignment to a hash). This
2098 usually means that you used the anon hash constructor when you meant
2099 to use parens. In any case, a hash requires key/value B<pairs>.
2101 %hash = { one => 1, two => 2, }; # WRONG
2102 %hash = [ qw/ an anon array / ]; # WRONG
2103 %hash = ( one => 1, two => 2, ); # right
2104 %hash = qw( one 1 two 2 ); # also fine
2106 =item Reference miscount in sv_replace()
2108 (W) The internal sv_replace() function was handed a new SV with a
2109 reference count of other than 1.
2111 =item regexp *+ operand could be empty
2113 (F) The part of the regexp subject to either the * or + quantifier
2114 could match an empty string.
2116 =item regexp memory corruption
2118 (P) The regular expression engine got confused by what the regular
2119 expression compiler gave it.
2121 =item regexp out of space
2123 (P) A "can't happen" error, because safemalloc() should have caught it earlier.
2125 =item regexp too big
2127 (F) The current implementation of regular expressions uses shorts as
2128 address offsets within a string. Unfortunately this means that if
2129 the regular expression compiles to longer than 32767, it'll blow up.
2130 Usually when you want a regular expression this big, there is a better
2131 way to do it with multiple statements. See L<perlre>.
2133 =item Reversed %s= operator
2135 (W) You wrote your assignment operator backwards. The = must always
2136 comes last, to avoid ambiguity with subsequent unary operators.
2138 =item Runaway format
2140 (F) Your format contained the ~~ repeat-until-blank sequence, but it
2141 produced 200 lines at once, and the 200th line looked exactly like the
2142 199th line. Apparently you didn't arrange for the arguments to exhaust
2143 themselves, either by using ^ instead of @ (for scalar variables), or by
2144 shifting or popping (for array variables). See L<perlform>.
2146 =item Scalar value @%s[%s] better written as $%s[%s]
2148 (W) You've used an array slice (indicated by @) to select a single element of
2149 an array. Generally it's better to ask for a scalar value (indicated by $).
2150 The difference is that C<$foo[&bar]> always behaves like a scalar, both when
2151 assigning to it and when evaluating its argument, while C<@foo[&bar]> behaves
2152 like a list when you assign to it, and provides a list context to its
2153 subscript, which can do weird things if you're expecting only one subscript.
2155 On the other hand, if you were actually hoping to treat the array
2156 element as a list, you need to look into how references work, because
2157 Perl will not magically convert between scalars and lists for you. See
2160 =item Scalar value @%s{%s} better written as $%s{%s}
2162 (W) You've used a hash slice (indicated by @) to select a single element of
2163 a hash. Generally it's better to ask for a scalar value (indicated by $).
2164 The difference is that C<$foo{&bar}> always behaves like a scalar, both when
2165 assigning to it and when evaluating its argument, while C<@foo{&bar}> behaves
2166 like a list when you assign to it, and provides a list context to its
2167 subscript, which can do weird things if you're expecting only one subscript.
2169 On the other hand, if you were actually hoping to treat the hash
2170 element as a list, you need to look into how references work, because
2171 Perl will not magically convert between scalars and lists for you. See
2174 =item Script is not setuid/setgid in suidperl
2176 (F) Oddly, the suidperl program was invoked on a script without a setuid
2177 or setgid bit set. This doesn't make much sense.
2179 =item Search pattern not terminated
2181 (F) The lexer couldn't find the final delimiter of a // or m{}
2182 construct. Remember that bracketing delimiters count nesting level.
2183 Missing the leading C<$> from a variable C<$m> may cause this error.
2185 =item %sseek() on unopened file
2187 (W) You tried to use the seek() or sysseek() function on a filehandle that
2188 was either never opened or has since been closed.
2190 =item select not implemented
2192 (F) This machine doesn't implement the select() system call.
2194 =item sem%s not implemented
2196 (F) You don't have System V semaphore IPC on your system.
2198 =item semi-panic: attempt to dup freed string
2200 (S) The internal newSVsv() routine was called to duplicate a scalar
2201 that had previously been marked as free.
2203 =item Semicolon seems to be missing
2205 (W) A nearby syntax error was probably caused by a missing semicolon,
2206 or possibly some other missing operator, such as a comma.
2208 =item Send on closed socket
2210 (W) The filehandle you're sending to got itself closed sometime before now.
2211 Check your logic flow.
2213 =item Sequence (? incomplete
2215 (F) A regular expression ended with an incomplete extension (?.
2218 =item Sequence (?#... not terminated
2220 (F) A regular expression comment must be terminated by a closing
2221 parenthesis. Embedded parentheses aren't allowed. See L<perlre>.
2223 =item Sequence (?%s...) not implemented
2225 (F) A proposed regular expression extension has the character reserved
2226 but has not yet been written. See L<perlre>.
2228 =item Sequence (?%s...) not recognized
2230 (F) You used a regular expression extension that doesn't make sense.
2235 Also known as "500 Server error".
2237 B<This is a CGI error, not a Perl error>.
2239 You need to make sure your script is executable, is accessible by the user
2240 CGI is running the script under (which is probably not the user account you
2241 tested it under), does not rely on any environment variables (like PATH)
2242 from the user it isn't running under, and isn't in a location where the CGI
2243 server can't find it, basically, more or less. Please see the following
2244 for more information:
2246 http://www.perl.com/perl/faq/idiots-guide.html
2247 http://www.perl.com/perl/faq/perl-cgi-faq.html
2248 ftp://rtfm.mit.edu/pub/usenet/news.answers/www/cgi-faq
2249 http://hoohoo.ncsa.uiuc.edu/cgi/interface.html
2250 http://www-genome.wi.mit.edu/WWW/faqs/www-security-faq.html
2252 =item setegid() not implemented
2254 (F) You tried to assign to C<$)>, and your operating system doesn't support
2255 the setegid() system call (or equivalent), or at least Configure didn't
2258 =item seteuid() not implemented
2260 (F) You tried to assign to C<$E<gt>>, and your operating system doesn't support
2261 the seteuid() system call (or equivalent), or at least Configure didn't
2264 =item setrgid() not implemented
2266 (F) You tried to assign to C<$(>, and your operating system doesn't support
2267 the setrgid() system call (or equivalent), or at least Configure didn't
2270 =item setruid() not implemented
2272 (F) You tried to assign to C<$E<lt>>, and your operating system doesn't support
2273 the setruid() system call (or equivalent), or at least Configure didn't
2276 =item Setuid/gid script is writable by world
2278 (F) The setuid emulator won't run a script that is writable by the world,
2279 because the world might have written on it already.
2281 =item shm%s not implemented
2283 (F) You don't have System V shared memory IPC on your system.
2285 =item shutdown() on closed fd
2287 (W) You tried to do a shutdown on a closed socket. Seems a bit superfluous.
2289 =item SIG%s handler "%s" not defined
2291 (W) The signal handler named in %SIG doesn't, in fact, exist. Perhaps you
2292 put it into the wrong package?
2294 =item sort is now a reserved word
2296 (F) An ancient error message that almost nobody ever runs into anymore.
2297 But before sort was a keyword, people sometimes used it as a filehandle.
2299 =item Sort subroutine didn't return a numeric value
2301 (F) A sort comparison routine must return a number. You probably blew
2302 it by not using C<E<lt>=E<gt>> or C<cmp>, or by not using them correctly.
2303 See L<perlfunc/sort>.
2305 =item Sort subroutine didn't return single value
2307 (F) A sort comparison subroutine may not return a list value with more
2308 or less than one element. See L<perlfunc/sort>.
2312 (P) The split was looping infinitely. (Obviously, a split shouldn't iterate
2313 more times than there are characters of input, which is what happened.)
2314 See L<perlfunc/split>.
2316 =item Stat on unopened file E<lt>%sE<gt>
2318 (W) You tried to use the stat() function (or an equivalent file test)
2319 on a filehandle that was either never opened or has since been closed.
2321 =item Statement unlikely to be reached
2323 (W) You did an exec() with some statement after it other than a die().
2324 This is almost always an error, because exec() never returns unless
2325 there was a failure. You probably wanted to use system() instead,
2326 which does return. To suppress this warning, put the exec() in a block
2329 =item Stub found while resolving method `%s' overloading `%s' in package `%s'
2331 (P) Overloading resolution over @ISA tree may be broken by importation stubs.
2332 Stubs should never be implicitely created, but explicit calls to C<can>
2335 =item Subroutine %s redefined
2337 (W) You redefined a subroutine. To suppress this warning, say
2341 eval "sub name { ... }";
2344 =item Substitution loop
2346 (P) The substitution was looping infinitely. (Obviously, a
2347 substitution shouldn't iterate more times than there are characters of
2348 input, which is what happened.) See the discussion of substitution in
2349 L<perlop/"Quote and Quote-like Operators">.
2351 =item Substitution pattern not terminated
2353 (F) The lexer couldn't find the interior delimiter of a s/// or s{}{}
2354 construct. Remember that bracketing delimiters count nesting level.
2355 Missing the leading C<$> from variable C<$s> may cause this error.
2357 =item Substitution replacement not terminated
2359 (F) The lexer couldn't find the final delimiter of a s/// or s{}{}
2360 construct. Remember that bracketing delimiters count nesting level.
2361 Missing the leading C<$> from variable C<$s> may cause this error.
2363 =item substr outside of string
2365 (S),(W) You tried to reference a substr() that pointed outside of a
2366 string. That is, the absolute value of the offset was larger than the
2367 length of the string. See L<perlfunc/substr>. This warning is
2368 mandatory if substr is used in an lvalue context (as the left hand side
2369 of an assignment or as a subroutine argument for example).
2371 =item suidperl is no longer needed since %s
2373 (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a
2374 version of the setuid emulator somehow got run anyway.
2378 (F) Probably means you had a syntax error. Common reasons include:
2380 A keyword is misspelled.
2381 A semicolon is missing.
2383 An opening or closing parenthesis is missing.
2384 An opening or closing brace is missing.
2385 A closing quote is missing.
2387 Often there will be another error message associated with the syntax
2388 error giving more information. (Sometimes it helps to turn on B<-w>.)
2389 The error message itself often tells you where it was in the line when
2390 it decided to give up. Sometimes the actual error is several tokens
2391 before this, because Perl is good at understanding random input.
2392 Occasionally the line number may be misleading, and once in a blue moon
2393 the only way to figure out what's triggering the error is to call
2394 C<perl -c> repeatedly, chopping away half the program each time to see
2395 if the error went away. Sort of the cybernetic version of S<20 questions>.
2397 =item syntax error at line %d: `%s' unexpected
2399 (A) You've accidentally run your script through the Bourne shell
2400 instead of Perl. Check the #! line, or manually feed your script
2403 =item System V IPC is not implemented on this machine
2405 (F) You tried to do something with a function beginning with "sem", "shm",
2406 or "msg". See L<perlfunc/semctl>, for example.
2408 =item Syswrite on closed filehandle
2410 (W) The filehandle you're writing to got itself closed sometime before now.
2411 Check your logic flow.
2413 =item Target of goto is too deeply nested
2415 (F) You tried to use C<goto> to reach a label that was too deeply
2416 nested for Perl to reach. Perl is doing you a favor by refusing.
2418 =item tell() on unopened file
2420 (W) You tried to use the tell() function on a filehandle that was either
2421 never opened or has since been closed.
2423 =item Test on unopened file E<lt>%sE<gt>
2425 (W) You tried to invoke a file test operator on a filehandle that isn't
2426 open. Check your logic. See also L<perlfunc/-X>.
2428 =item That use of $[ is unsupported
2430 (F) Assignment to C<$[> is now strictly circumscribed, and interpreted as
2431 a compiler directive. You may say only one of
2440 This is to prevent the problem of one module changing the array base
2441 out from under another module inadvertently. See L<perlvar/$[>.
2443 =item The %s function is unimplemented
2445 The function indicated isn't implemented on this architecture, according
2446 to the probings of Configure.
2448 =item The crypt() function is unimplemented due to excessive paranoia
2450 (F) Configure couldn't find the crypt() function on your machine,
2451 probably because your vendor didn't supply it, probably because they
2452 think the U.S. Government thinks it's a secret, or at least that they
2453 will continue to pretend that it is. And if you quote me on that, I
2456 =item The stat preceding C<-l _> wasn't an lstat
2458 (F) It makes no sense to test the current stat buffer for symbolic linkhood
2459 if the last stat that wrote to the stat buffer already went past
2460 the symlink to get to the real file. Use an actual filename instead.
2462 =item times not implemented
2464 (F) Your version of the C library apparently doesn't do times(). I suspect
2465 you're not running on Unix.
2467 =item Too few args to syscall
2469 (F) There has to be at least one argument to syscall() to specify the
2470 system call to call, silly dilly.
2472 =item Too late for "B<-T>" option
2474 (X) The #! line (or local equivalent) in a Perl script contains the
2475 B<-T> option, but Perl was not invoked with B<-T> in its command line.
2476 This is an error because, by the time Perl discovers a B<-T> in a
2477 script, it's too late to properly taint everything from the environment.
2480 If the Perl script is being executed as a command using the #!
2481 mechanism (or its local equivalent), this error can usually be fixed
2482 by editing the #! line so that the B<-T> option is a part of Perl's
2483 first argument: e.g. change C<perl -n -T> to C<perl -T -n>.
2485 If the Perl script is being executed as C<perl scriptname>, then the
2486 B<-T> option must appear on the command line: C<perl -T scriptname>.
2488 =item Too late for "-%s" option
2490 (X) The #! line (or local equivalent) in a Perl script contains the
2491 B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options
2492 are not intended for use inside scripts. Use the C<use> pragma instead.
2498 (A) You've accidentally run your script through B<csh> instead
2499 of Perl. Check the #! line, or manually feed your script into
2502 =item Too many args to syscall
2504 (F) Perl supports a maximum of only 14 args to syscall().
2506 =item Too many arguments for %s
2508 (F) The function requires fewer arguments than you specified.
2510 =item trailing \ in regexp
2512 (F) The regular expression ends with an unbackslashed backslash. Backslash
2515 =item Transliteration pattern not terminated
2517 (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][]
2518 or y/// or y[][] construct. Missing the leading C<$> from variables
2519 C<$tr> or C<$y> may cause this error.
2521 =item Transliteration replacement not terminated
2523 (F) The lexer couldn't find the final delimiter of a tr/// or tr[][]
2526 =item truncate not implemented
2528 (F) Your machine doesn't implement a file truncation mechanism that
2529 Configure knows about.
2531 =item Type of arg %d to %s must be %s (not %s)
2533 (F) This function requires the argument in that position to be of a
2534 certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be
2535 %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the
2536 {EXPR} forms as an explicit dereference. See L<perlref>.
2538 =item umask: argument is missing initial 0
2540 (W) A umask of 222 is incorrect. It should be 0222, because octal literals
2541 always start with 0 in Perl, as in C.
2543 =item Unable to create sub named "%s"
2545 (F) You attempted to create or access a subroutine with an illegal name.
2547 =item Unbalanced context: %d more PUSHes than POPs
2549 (W) The exit code detected an internal inconsistency in how many execution
2550 contexts were entered and left.
2552 =item Unbalanced saves: %d more saves than restores
2554 (W) The exit code detected an internal inconsistency in how many
2555 values were temporarily localized.
2557 =item Unbalanced scopes: %d more ENTERs than LEAVEs
2559 (W) The exit code detected an internal inconsistency in how many blocks
2560 were entered and left.
2562 =item Unbalanced tmps: %d more allocs than frees
2564 (W) The exit code detected an internal inconsistency in how many mortal
2565 scalars were allocated and freed.
2567 =item Undefined format "%s" called
2569 (F) The format indicated doesn't seem to exist. Perhaps it's really in
2570 another package? See L<perlform>.
2572 =item Undefined sort subroutine "%s" called
2574 (F) The sort comparison routine specified doesn't seem to exist. Perhaps
2575 it's in a different package? See L<perlfunc/sort>.
2577 =item Undefined subroutine &%s called
2579 (F) The subroutine indicated hasn't been defined, or if it was, it
2580 has since been undefined.
2582 =item Undefined subroutine called
2584 (F) The anonymous subroutine you're trying to call hasn't been defined,
2585 or if it was, it has since been undefined.
2587 =item Undefined subroutine in sort
2589 (F) The sort comparison routine specified is declared but doesn't seem to
2590 have been defined yet. See L<perlfunc/sort>.
2592 =item Undefined top format "%s" called
2594 (F) The format indicated doesn't seem to exist. Perhaps it's really in
2595 another package? See L<perlform>.
2597 =item Undefined value assigned to typeglob
2599 (W) An undefined value was assigned to a typeglob, a la C<*foo = undef>.
2600 This does nothing. It's possible that you really mean C<undef *foo>.
2602 =item unexec of %s into %s failed!
2604 (F) The unexec() routine failed for some reason. See your local FSF
2605 representative, who probably put it there in the first place.
2607 =item Unknown BYTEORDER
2609 (F) There are no byte-swapping functions for a machine with this byte order.
2611 =item unmatched () in regexp
2613 (F) Unbackslashed parentheses must always be balanced in regular
2614 expressions. If you're a vi user, the % key is valuable for finding
2615 the matching parenthesis. See L<perlre>.
2617 =item Unmatched right bracket
2619 (F) The lexer counted more closing curly brackets (braces) than opening
2620 ones, so you're probably missing an opening bracket. As a general
2621 rule, you'll find the missing one (so to speak) near the place you were
2624 =item unmatched [] in regexp
2626 (F) The brackets around a character class must match. If you wish to
2627 include a closing bracket in a character class, backslash it or put it first.
2630 =item Unquoted string "%s" may clash with future reserved word
2632 (W) You used a bareword that might someday be claimed as a reserved word.
2633 It's best to put such a word in quotes, or capitalize it somehow, or insert
2634 an underbar into it. You might also declare it as a subroutine.
2636 =item Unrecognized character %s
2638 (F) The Perl parser has no idea what to do with the specified character
2639 in your Perl script (or eval). Perhaps you tried to run a compressed
2640 script, a binary program, or a directory as a Perl program.
2642 =item Unrecognized signal name "%s"
2644 (F) You specified a signal name to the kill() function that was not recognized.
2645 Say C<kill -l> in your shell to see the valid signal names on your system.
2647 =item Unrecognized switch: -%s (-h will show valid options)
2649 (F) You specified an illegal option to Perl. Don't do that.
2650 (If you think you didn't do that, check the #! line to see if it's
2651 supplying the bad switch on your behalf.)
2653 =item Unsuccessful %s on filename containing newline
2655 (W) A file operation was attempted on a filename, and that operation
2656 failed, PROBABLY because the filename contained a newline, PROBABLY
2657 because you forgot to chop() or chomp() it off. See L<perlfunc/chomp>.
2659 =item Unsupported directory function "%s" called
2661 (F) Your machine doesn't support opendir() and readdir().
2663 =item Unsupported function fork
2665 (F) Your version of executable does not support forking.
2667 Note that under some systems, like OS/2, there may be different flavors of
2668 Perl executables, some of which may support fork, some not. Try changing
2669 the name you call Perl by to C<perl_>, C<perl__>, and so on.
2671 =item Unsupported function %s
2673 (F) This machine doesn't implement the indicated function, apparently.
2674 At least, Configure doesn't think so.
2676 =item Unsupported socket function "%s" called
2678 (F) Your machine doesn't support the Berkeley socket mechanism, or at
2679 least that's what Configure thought.
2681 =item Unterminated E<lt>E<gt> operator
2683 (F) The lexer saw a left angle bracket in a place where it was expecting
2684 a term, so it's looking for the corresponding right angle bracket, and not
2685 finding it. Chances are you left some needed parentheses out earlier in
2686 the line, and you really meant a "less than".
2688 =item Use of "$$<digit>" to mean "${$}<digit>" is deprecated
2690 (D) Perl versions before 5.004 misinterpreted any type marker followed
2691 by "$" and a digit. For example, "$$0" was incorrectly taken to mean
2692 "${$}0" instead of "${$0}". This bug is (mostly) fixed in Perl 5.004.
2694 However, the developers of Perl 5.004 could not fix this bug completely,
2695 because at least two widely-used modules depend on the old meaning of
2696 "$$0" in a string. So Perl 5.004 still interprets "$$<digit>" in the
2697 old (broken) way inside strings; but it generates this message as a
2698 warning. And in Perl 5.005, this special treatment will cease.
2700 =item Use of $# is deprecated
2702 (D) This was an ill-advised attempt to emulate a poorly defined B<awk> feature.
2703 Use an explicit printf() or sprintf() instead.
2705 =item Use of $* is deprecated
2707 (D) This variable magically turned on multi-line pattern matching, both for
2708 you and for any luckless subroutine that you happen to call. You should
2709 use the new C<//m> and C<//s> modifiers now to do that without the dangerous
2710 action-at-a-distance effects of C<$*>.
2712 =item Use of %s in printf format not supported
2714 (F) You attempted to use a feature of printf that is accessible from
2715 only C. This usually means there's a better way to do it in Perl.
2717 =item Use of bare E<lt>E<lt> to mean E<lt>E<lt>"" is deprecated
2719 (D) You are now encouraged to use the explicitly quoted form if you
2720 wish to use an empty line as the terminator of the here-document.
2722 =item Use of implicit split to @_ is deprecated
2724 (D) It makes a lot of work for the compiler when you clobber a
2725 subroutine's argument list, so it's better if you assign the results of
2726 a split() explicitly to an array (or list).
2728 =item Use of inherited AUTOLOAD for non-method %s() is deprecated
2730 (D) As an (ahem) accidental feature, C<AUTOLOAD> subroutines are looked
2731 up as methods (using the C<@ISA> hierarchy) even when the subroutines to
2732 be autoloaded were called as plain functions (e.g. C<Foo::bar()>), not
2733 as methods (e.g. C<Foo-E<gt>bar()> or C<$obj-E<gt>bar()>).
2735 This bug will be rectified in Perl 5.005, which will use method lookup
2736 only for methods' C<AUTOLOAD>s. However, there is a significant base
2737 of existing code that may be using the old behavior. So, as an
2738 interim step, Perl 5.004 issues an optional warning when non-methods
2739 use inherited C<AUTOLOAD>s.
2741 The simple rule is: Inheritance will not work when autoloading
2742 non-methods. The simple fix for old code is: In any module that used to
2743 depend on inheriting C<AUTOLOAD> for non-methods from a base class named
2744 C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during startup.
2746 In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> you
2747 should remove AutoLoader from @ISA and change C<use AutoLoader;> to
2748 C<use AutoLoader 'AUTOLOAD';>.
2750 =item Use of reserved word "%s" is deprecated
2752 (D) The indicated bareword is a reserved word. Future versions of perl
2753 may use it as a keyword, so you're better off either explicitly quoting
2754 the word in a manner appropriate for its context of use, or using a
2755 different name altogether. The warning can be suppressed for subroutine
2756 names by either adding a C<&> prefix, or using a package qualifier,
2757 e.g. C<&our()>, or C<Foo::our()>.
2759 =item Use of %s is deprecated
2761 (D) The construct indicated is no longer recommended for use, generally
2762 because there's a better way to do it, and also because the old way has
2765 =item Use of uninitialized value
2767 (W) An undefined value was used as if it were already defined. It was
2768 interpreted as a "" or a 0, but maybe it was a mistake. To suppress this
2769 warning assign an initial value to your variables.
2771 =item Useless use of %s in void context
2773 (W) You did something without a side effect in a context that does nothing
2774 with the return value, such as a statement that doesn't return a value
2775 from a block, or the left side of a scalar comma operator. Very often
2776 this points not to stupidity on your part, but a failure of Perl to parse
2777 your program the way you thought it would. For example, you'd get this
2778 if you mixed up your C precedence with Python precedence and said
2782 when you meant to say
2784 ($one, $two) = (1, 2);
2786 Another common error is to use ordinary parentheses to construct a list
2787 reference when you should be using square or curly brackets, for
2792 when you should have said
2796 The square brackets explicitly turn a list value into a scalar value,
2797 while parentheses do not. So when a parenthesized list is evaluated in
2798 a scalar context, the comma is treated like C's comma operator, which
2799 throws away the left argument, which is not what you want. See
2800 L<perlref> for more on this.
2802 =item untie attempted while %d inner references still exist
2804 (W) A copy of the object returned from C<tie> (or C<tied>) was still
2805 valid when C<untie> was called.
2807 =item Value of %s can be "0"; test with defined()
2809 (W) In a conditional expression, you used <HANDLE>, <*> (glob), C<each()>,
2810 or C<readdir()> as a boolean value. Each of these constructs can return a
2811 value of "0"; that would make the conditional expression false, which is
2812 probably not what you intended. When using these constructs in conditional
2813 expressions, test their values with the C<defined> operator.
2815 =item Variable "%s" is not imported%s
2817 (F) While "use strict" in effect, you referred to a global variable
2818 that you apparently thought was imported from another module, because
2819 something else of the same name (usually a subroutine) is exported
2820 by that module. It usually means you put the wrong funny character
2821 on the front of your variable.
2823 =item Variable "%s" may be unavailable
2825 (W) An inner (nested) I<anonymous> subroutine is inside a I<named>
2826 subroutine, and outside that is another subroutine; and the anonymous
2827 (innermost) subroutine is referencing a lexical variable defined in
2828 the outermost subroutine. For example:
2830 sub outermost { my $a; sub middle { sub { $a } } }
2832 If the anonymous subroutine is called or referenced (directly or
2833 indirectly) from the outermost subroutine, it will share the variable
2834 as you would expect. But if the anonymous subroutine is called or
2835 referenced when the outermost subroutine is not active, it will see
2836 the value of the shared variable as it was before and during the
2837 *first* call to the outermost subroutine, which is probably not what
2840 In these circumstances, it is usually best to make the middle
2841 subroutine anonymous, using the C<sub {}> syntax. Perl has specific
2842 support for shared variables in nested anonymous subroutines; a named
2843 subroutine in between interferes with this feature.
2845 =item Variable "%s" will not stay shared
2847 (W) An inner (nested) I<named> subroutine is referencing a lexical
2848 variable defined in an outer subroutine.
2850 When the inner subroutine is called, it will probably see the value of
2851 the outer subroutine's variable as it was before and during the
2852 *first* call to the outer subroutine; in this case, after the first
2853 call to the outer subroutine is complete, the inner and outer
2854 subroutines will no longer share a common value for the variable. In
2855 other words, the variable will no longer be shared.
2857 Furthermore, if the outer subroutine is anonymous and references a
2858 lexical variable outside itself, then the outer and inner subroutines
2859 will I<never> share the given variable.
2861 This problem can usually be solved by making the inner subroutine
2862 anonymous, using the C<sub {}> syntax. When inner anonymous subs that
2863 reference variables in outer subroutines are called or referenced,
2864 they are automatically rebound to the current values of such
2867 =item Variable syntax
2869 (A) You've accidentally run your script through B<csh> instead
2870 of Perl. Check the #! line, or manually feed your script into
2873 =item perl: warning: Setting locale failed.
2875 (S) The whole warning message will look something like:
2877 perl: warning: Setting locale failed.
2878 perl: warning: Please check that your locale settings:
2881 are supported and installed on your system.
2882 perl: warning: Falling back to the standard locale ("C").
2884 Exactly what were the failed locale settings varies. In the above the
2885 settings were that the LC_ALL was "En_US" and the LANG had no value.
2886 This error means that Perl detected that you and/or your system
2887 administrator have set up the so-called variable system but Perl could
2888 not use those settings. This was not dead serious, fortunately: there
2889 is a "default locale" called "C" that Perl can and will use, the
2890 script will be run. Before you really fix the problem, however, you
2891 will get the same error message each time you run Perl. How to really
2892 fix the problem can be found in L<perllocale> section B<LOCALE PROBLEMS>.
2894 =item Warning: something's wrong
2896 (W) You passed warn() an empty string (the equivalent of C<warn "">) or
2897 you called it with no args and C<$_> was empty.
2899 =item Warning: unable to close filehandle %s properly
2901 (S) The implicit close() done by an open() got an error indication on the
2902 close(). This usually indicates your file system ran out of disk space.
2904 =item Warning: Use of "%s" without parentheses is ambiguous
2906 (S) You wrote a unary operator followed by something that looks like a
2907 binary operator that could also have been interpreted as a term or
2908 unary operator. For instance, if you know that the rand function
2909 has a default argument of 1.0, and you write
2913 you may THINK you wrote the same thing as
2917 but in actual fact, you got
2921 So put in parentheses to say what you really mean.
2923 =item Write on closed filehandle
2925 (W) The filehandle you're writing to got itself closed sometime before now.
2926 Check your logic flow.
2928 =item X outside of string
2930 (F) You had a pack template that specified a relative position before
2931 the beginning of the string being unpacked. See L<perlfunc/pack>.
2933 =item x outside of string
2935 (F) You had a pack template that specified a relative position after
2936 the end of the string being unpacked. See L<perlfunc/pack>.
2938 =item Xsub "%s" called in sort
2940 (F) The use of an external subroutine as a sort comparison is not yet supported.
2942 =item Xsub called in sort
2944 (F) The use of an external subroutine as a sort comparison is not yet supported.
2946 =item You can't use C<-l> on a filehandle
2948 (F) A filehandle represents an opened file, and when you opened the file it
2949 already went past any symlink you are presumably trying to look for.
2950 Use a filename instead.
2952 =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!
2954 (F) And you probably never will, because you probably don't have the
2955 sources to your kernel, and your vendor probably doesn't give a rip
2956 about what you want. Your best bet is to use the wrapsuid script in
2957 the eg directory to put a setuid C wrapper around your script.
2959 =item You need to quote "%s"
2961 (W) You assigned a bareword as a signal handler name. Unfortunately, you
2962 already have a subroutine of that name declared, which means that Perl 5
2963 will try to call the subroutine when the assignment is executed, which is
2964 probably not what you want. (If it IS what you want, put an & in front.)
2966 =item [gs]etsockopt() on closed fd
2968 (W) You tried to get or set a socket option on a closed socket.
2969 Did you forget to check the return value of your socket() call?
2970 See L<perlfunc/getsockopt>.
2972 =item \1 better written as $1
2974 (W) Outside of patterns, backreferences live on as variables. The use
2975 of backslashes is grandfathered on the right-hand side of a
2976 substitution, but stylistically it's better to use the variable form
2977 because other Perl programmers will expect it, and it works better
2978 if there are more than 9 backreferences.
2980 =item '|' and 'E<lt>' may not both be specified on command line
2982 (F) An error peculiar to VMS. Perl does its own command line redirection, and
2983 found that STDIN was a pipe, and that you also tried to redirect STDIN using
2984 'E<lt>'. Only one STDIN stream to a customer, please.
2986 =item '|' and 'E<gt>' may not both be specified on command line
2988 (F) An error peculiar to VMS. Perl does its own command line redirection, and
2989 thinks you tried to redirect stdout both to a file and into a pipe to another
2990 command. You need to choose one or the other, though nothing's stopping you
2991 from piping into a program or Perl script which 'splits' output into two
2994 open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
3001 =item Got an error from DosAllocMem
3003 (P) An error peculiar to OS/2. Most probably you're using an obsolete
3004 version of Perl, and this should not happen anyway.
3006 =item Malformed PERLLIB_PREFIX
3008 (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
3016 with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix
3017 of a builtin library search path, prefix2 is substituted. The error
3018 may appear if components are not found, or are too long. See
3019 "PERLLIB_PREFIX" in F<README.os2>.
3021 =item PERL_SH_DIR too long
3023 (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the
3024 C<sh>-shell in. See "PERL_SH_DIR" in F<README.os2>.
3026 =item Process terminated by SIG%s
3028 (W) This is a standard message issued by OS/2 applications, while *nix
3029 applications die in silence. It is considered a feature of the OS/2
3030 port. One can easily disable this by appropriate sighandlers, see
3031 L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT"