This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Increase $attributes::version to 0.15
[perl5.git] / pod / perldiag.pod
CommitLineData
a0d0e21e
LW
1=head1 NAME
2
3perldiag - various Perl diagnostics
4
5=head1 DESCRIPTION
6
7These messages are classified as follows (listed in increasing order of
8desperation):
9
10 (W) A warning (optional).
d1d15184 11 (D) A deprecation (enabled by default).
00eb3f2b 12 (S) A severe warning (enabled by default).
a0d0e21e
LW
13 (F) A fatal error (trappable).
14 (P) An internal error you should never see (trappable).
54310121 15 (X) A very fatal error (nontrappable).
cb1a09d0 16 (A) An alien error message (not generated by Perl).
a0d0e21e 17
75b44862 18The majority of messages from the first three classifications above
64977eb6 19(W, D & S) can be controlled using the C<warnings> pragma.
e476b1b5
GS
20
21If a message can be controlled by the C<warnings> pragma, its warning
22category is included with the classification letter in the description
23below.
24
25Optional warnings are enabled by using the C<warnings> pragma or the B<-w>
26and B<-W> switches. Warnings may be captured by setting C<$SIG{__WARN__}>
27to a reference to a routine that will be called on each warning instead
28of printing it. See L<perlvar>.
29
b7eceb5b 30Severe warnings are always enabled, unless they are explicitly disabled
e476b1b5 31with the C<warnings> pragma or the B<-X> switch.
4438c4b7 32
748a9306 33Trappable errors may be trapped using the eval operator. See
4438c4b7
JH
34L<perlfunc/eval>. In almost all cases, warnings may be selectively
35disabled or promoted to fatal errors using the C<warnings> pragma.
36See L<warnings>.
a0d0e21e 37
6df41af2
GS
38The messages are in alphabetical order, without regard to upper or
39lower-case. Some of these messages are generic. Spots that vary are
40denoted with a %s or other printf-style escape. These escapes are
41ignored by the alphabetical order, as are all characters other than
42letters. To look up your message, just ignore anything that is not a
43letter.
a0d0e21e
LW
44
45=over 4
46
6df41af2 47=item accept() on closed socket %s
33633739 48
be771a83
GS
49(W closed) You tried to do an accept on a closed socket. Did you forget
50to check the return value of your socket() call? See
51L<perlfunc/accept>.
33633739 52
de42a5a9 53=item Allocation too large: %x
a0d0e21e 54
6df41af2 55(X) You can't allocate more than 64K on an MS-DOS machine.
a0d0e21e 56
1109a392 57=item '%c' allowed only after types %s
ef54e1a4 58
1109a392
MHM
59(F) The modifiers '!', '<' and '>' are allowed in pack() or unpack() only
60after certain types. See L<perlfunc/pack>.
ef54e1a4 61
6df41af2 62=item Ambiguous call resolved as CORE::%s(), qualify as such or use &
43192e07 63
75b44862 64(W ambiguous) A subroutine you have declared has the same name as a Perl
be771a83
GS
65keyword, and you have used the name without qualification for calling
66one or the other. Perl decided to call the builtin because the
67subroutine is not imported.
43192e07 68
6df41af2
GS
69To force interpretation as a subroutine call, either put an ampersand
70before the subroutine name, or qualify the name with its package.
71Alternatively, you can import the subroutine (or pretend that it's
72imported with the C<use subs> pragma).
43192e07 73
6df41af2 74To silently interpret it as the Perl operator, use the C<CORE::> prefix
496a33f5 75on the operator (e.g. C<CORE::log($x)>) or declare the subroutine
be771a83
GS
76to be an object method (see L<perlsub/"Subroutine Attributes"> or
77L<attributes>).
43192e07 78
c2e66d9e
GS
79=item Ambiguous range in transliteration operator
80
81(F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at
82all. To include a C<-> character in a transliteration, put it either
83first or last. (In the past, C<tr/a-z-0//> was synonymous with
84C<tr/a-y//>, which was probably not what you would have expected.)
85
6df41af2 86=item Ambiguous use of %s resolved as %s
43192e07 87
6df41af2
GS
88(W ambiguous)(S) You said something that may not be interpreted the way
89you thought. Normally it's pretty easy to disambiguate it by supplying
90a missing quote, operator, parenthesis pair or declaration.
a0d0e21e 91
d8225693
JM
92=item Ambiguous use of %c resolved as operator %c
93
94(W ambiguous) C<%>, C<&>, and C<*> are both infix operators (modulus,
3303f755
FC
95bitwise and, and multiplication) I<and> initial special characters
96(denoting hashes, subroutines and typeglobs), and you said something
97like C<*foo * foo> that might be interpreted as either of them. We
98assumed you meant the infix operator, but please try to make it more
99clear -- in the example given, you might write C<*foo * foo()> if you
100really meant to multiply a glob by the result of calling a function.
d8225693 101
1ef43bca
JM
102=item Ambiguous use of %c{%s} resolved to %c%s
103
104(W ambiguous) You wrote something like C<@{foo}>, which might be
105asking for the variable C<@foo>, or it might be calling a function
106named foo, and dereferencing it as an array reference. If you wanted
107the varable, you can just write C<@foo>. If you wanted to call the
108function, write C<@{foo()}> ... or you could just not have a variable
109and a function with the same name, and save yourself a lot of trouble.
110
e850844c
FC
111=item Ambiguous use of %c{%s[...]} resolved to %c%s[...]
112
113=item Ambiguous use of %c{%s{...}} resolved to %c%s{...}
4da60377 114
ccaaf480
FC
115(W ambiguous) You wrote something like C<${foo[2]}> (where foo
116represents the name of a Perl keyword), which might be looking for
117element number 2 of the array named C<@foo>, in which case please write
118C<$foo[2]>, or you might have meant to pass an anonymous arrayref to
119the function named foo, and then do a scalar deref on the value it
120returns. If you meant that, write C<${foo([2])}>.
121
122In regular expressions, the C<${foo[2]}> syntax is sometimes necessary
123to disambiguate between array subscripts and character classes.
124C</$length[2345]/>, for instance, will be interpreted as C<$length>
125followed by the character class C<[2345]>. If an array subscript is what
126you want, you can avoid the warning by changing C</${length[2345]}/>
127to the unsightly C</${\$length[2345]}/>, by renaming your array to
128something that does not coincide with a built-in keyword, or by
129simply turning off warnings with C<no warnings 'ambiguous';>.
4da60377 130
bdac9d71 131=item Ambiguous use of -%s resolved as -&%s()
397d0f13
JM
132
133(W ambiguous) You wrote something like C<-foo>, which might be the
a7f6e211
FC
134string C<"-foo">, or a call to the function C<foo>, negated. If you meant
135the string, just write C<"-foo">. If you meant the function call,
397d0f13
JM
136write C<-foo()>.
137
94b03d7d
KW
138=item Ambiguous use of 's//le...' resolved as 's// le...'; Rewrite as 's//el' if you meant 'use locale rules and evaluate rhs as an expression'. In Perl 5.16, it will be resolved the other way
139
140(W deprecated, ambiguous) You wrote a pattern match with substitution
141immediately followed by "le". In Perl 5.14 and earlier, this is
142resolved as meaning to take the result of the substitution, and see if
143it is stringwise less-than-or-equal-to what follows in the expression.
144Having the "le" immediately following a pattern is deprecated behavior,
145so in Perl 5.16, this expression will be resolved as meaning to do the
146pattern match using the rules of the current locale, and evaluate the
147rhs as an expression when doing the substitution. In 5.14, if you want
148the latter interpretation, you can simply write "el" instead.
149
6df41af2 150=item '|' and '<' may not both be specified on command line
a0d0e21e 151
be771a83
GS
152(F) An error peculiar to VMS. Perl does its own command line
153redirection, and found that STDIN was a pipe, and that you also tried to
154redirect STDIN using '<'. Only one STDIN stream to a customer, please.
c9f97d15 155
6df41af2 156=item '|' and '>' may not both be specified on command line
1028017a 157
be771a83
GS
158(F) An error peculiar to VMS. Perl does its own command line
159redirection, and thinks you tried to redirect stdout both to a file and
160into a pipe to another command. You need to choose one or the other,
161though nothing's stopping you from piping into a program or Perl script
162which 'splits' output into two streams, such as
1028017a 163
6df41af2
GS
164 open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
165 while (<STDIN>) {
166 print;
167 print OUT;
168 }
169 close OUT;
c9f97d15 170
6df41af2 171=item Applying %s to %s will act on scalar(%s)
eb6e2d6f 172
496a33f5
SC
173(W misc) The pattern match (C<//>), substitution (C<s///>), and
174transliteration (C<tr///>) operators work on scalar values. If you apply
be771a83 175one of them to an array or a hash, it will convert the array or hash to
ac036724 176a scalar value (the length of an array, or the population info of a
177hash) and then work on that scalar value. This is probably not what
be771a83
GS
178you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for
179alternatives.
eb6e2d6f 180
6df41af2 181=item Arg too short for msgsnd
76cd736e 182
6df41af2 183(F) msgsnd() requires a string at least as long as sizeof(long).
76cd736e 184
b0fdf69e 185=item %s argument is not a HASH or ARRAY element or a subroutine
a0d0e21e 186
cc1c2e42
FC
187(F) The argument to exists() must be a hash or array element or a
188subroutine with an ampersand, such as:
a0d0e21e
LW
189
190 $foo{$bar}
cb4f522a 191 $ref->{"susie"}[12]
cc1c2e42 192 &do_something
a0d0e21e 193
8ea97a1e 194=item %s argument is not a HASH or ARRAY element or slice
5f05dabc 195
06e52bfa
FC
196(F) The argument to delete() must be either a hash or array element,
197such as:
5f05dabc
PP
198
199 $foo{$bar}
cb4f522a 200 $ref->{"susie"}[12]
5f05dabc 201
8ea97a1e 202or a hash or array slice, such as:
5f05dabc 203
6df41af2
GS
204 @foo[$bar, $baz, $xyzzy]
205 @{$ref->[12]}{"susie", "queue"}
5315574d 206
6df41af2 207=item %s argument is not a subroutine name
a0d0e21e 208
6df41af2 209(F) The argument to exists() for C<exists &sub> must be a subroutine
be771a83
GS
210name, and not a subroutine call. C<exists &sub()> will generate this
211error.
a0d0e21e 212
f86702cc 213=item Argument "%s" isn't numeric%s
a0d0e21e 214
be771a83
GS
215(W numeric) The indicated string was fed as an argument to an operator
216that expected a numeric value instead. If you're fortunate the message
217will identify which operator was so unfortunate.
a0d0e21e 218
b4581f09
JH
219=item Argument list not closed for PerlIO layer "%s"
220
221(W layer) When pushing a layer with arguments onto the Perl I/O system you
222forgot the ) that closes the argument list. (Layers take care of transforming
223data between external and internal representations.) Perl stopped parsing
224the layer list at this point and did not attempt to push this layer.
225If your program didn't explicitly request the failing operation, it may be
226the result of the value of the environment variable PERLIO.
227
a0d0e21e
LW
228=item Array @%s missing the @ in argument %d of %s()
229
75b44862
GS
230(D deprecated) Really old Perl let you omit the @ on array names in some
231spots. This is now heavily deprecated.
a0d0e21e
LW
232
233=item assertion botched: %s
234
235(P) The malloc package that comes with Perl had an internal failure.
236
237=item Assertion failed: file "%s"
238
239(P) A general assertion failed. The file in question must be examined.
240
241=item Assignment to both a list and a scalar
242
243(F) If you assign to a conditional operator, the 2nd and 3rd arguments
244must either both be scalars or both be lists. Otherwise Perl won't
245know which context to supply to the right side.
246
96ebfdd7
RK
247=item A thread exited while %d threads were running
248
4447dfc1 249(W threads)(S) When using threaded Perl, a thread (not necessarily the main
96ebfdd7 250thread) exited while there were still other threads running.
111a855e
FC
251Usually it's a good idea first to collect the return values of the
252created threads by joining them, and only then to exit from the main
96ebfdd7
RK
253thread. See L<threads>.
254
2393f1b9 255=item Attempt to access disallowed key '%s' in a restricted hash
1b1f1335 256
49293501 257(F) The failing code has attempted to get or set a key which is not in
2393f1b9 258the current set of allowed keys of a restricted hash.
49293501 259
81689caa
HS
260=item Attempt to bless into a reference
261
262(F) The CLASSNAME argument to the bless() operator is expected to be
263the name of the package to bless the resulting object into. You've
264supplied instead a reference to something: perhaps you wrote
265
266 bless $self, $proto;
267
268when you intended
269
270 bless $self, ref($proto) || $proto;
271
272If you actually want to bless into the stringified version
273of the reference supplied, you need to stringify it yourself, for
274example by:
275
276 bless $self, "$proto";
277
96ebfdd7
RK
278=item Attempt to delete disallowed key '%s' from a restricted hash
279
280(F) The failing code attempted to delete from a restricted hash a key
281which is not in its key set.
282
283=item Attempt to delete readonly key '%s' from a restricted hash
284
285(F) The failing code attempted to delete a key whose value has been
286declared readonly from a restricted hash.
287
de42a5a9 288=item Attempt to free non-arena SV: 0x%x
a0d0e21e 289
be771a83
GS
290(P internal) All SV objects are supposed to be allocated from arenas
291that will be garbage collected on exit. An SV was discovered to be
292outside any of those arenas.
a0d0e21e 293
54310121 294=item Attempt to free nonexistent shared string
bbce6d69 295
111a855e 296(P internal) Perl maintains a reference-counted internal table of
be771a83
GS
297strings to optimize the storage and access of hash keys and other
298strings. This indicates someone tried to decrement the reference count
299of a string that can no longer be found in the table.
bbce6d69 300
a0d0e21e
LW
301=item Attempt to free temp prematurely
302
be771a83
GS
303(W debugging) Mortalized values are supposed to be freed by the
304free_tmps() routine. This indicates that something else is freeing the
305SV before the free_tmps() routine gets a chance, which means that the
306free_tmps() routine will be freeing an unreferenced scalar when it does
307try to free it.
a0d0e21e
LW
308
309=item Attempt to free unreferenced glob pointers
310
e476b1b5 311(P internal) The reference counts got screwed up on symbol aliases.
a0d0e21e
LW
312
313=item Attempt to free unreferenced scalar
314
be771a83
GS
315(W internal) Perl went to decrement the reference count of a scalar to
316see if it would go to 0, and discovered that it had already gone to 0
317earlier, and should have been freed, and in fact, probably was freed.
318This could indicate that SvREFCNT_dec() was called too many times, or
319that SvREFCNT_inc() was called too few times, or that the SV was
320mortalized when it shouldn't have been, or that memory has been
321corrupted.
a0d0e21e 322
dcdda58d
GS
323=item Attempt to join self
324
325(F) You tried to join a thread from within itself, which is an
be771a83
GS
326impossible task. You may be joining the wrong thread, or you may need
327to move the join() to some other thread.
dcdda58d 328
84902520
TB
329=item Attempt to pack pointer to temporary value
330
be771a83
GS
331(W pack) You tried to pass a temporary value (like the result of a
332function, or a computed expression) to the "p" pack() template. This
333means the result contains a pointer to a location that could become
334invalid anytime, even before the end of the current statement. Use
335literals or global values as arguments to the "p" pack() template to
336avoid this warning.
84902520 337
087b5369
RD
338=item Attempt to reload %s aborted.
339
340(F) You tried to load a file with C<use> or C<require> that failed to
341compile once already. Perl will not try to compile this file again
342unless you delete its entry from %INC. See L<perlfunc/require> and
343L<perlvar/%INC>.
344
1b20cd17
NC
345=item Attempt to set length of freed array
346
347(W) You tried to set the length of an array which has been freed. You
348can do this by storing a reference to the scalar representing the last index
349of an array and later assigning through that reference. For example
350
351 $r = do {my @a; \$#a};
352 $$r = 503
353
b7a902f4
PP
354=item Attempt to use reference as lvalue in substr
355
be771a83
GS
356(W substr) You supplied a reference as the first argument to substr()
357used as an lvalue, which is pretty strange. Perhaps you forgot to
358dereference it first. See L<perlfunc/substr>.
b7a902f4 359
c32124fe
NC
360=item Attribute "locked" is deprecated
361
111a855e 362(D deprecated) You have used the attributes pragma to modify the "locked"
c32124fe 363attribute on a code reference. The :locked attribute is obsolete, has had no
a5547419 364effect since 5005 threads were removed, and will be removed in a future
c32124fe
NC
365release of Perl 5.
366
f1a3ce43
NC
367=item Attribute "unique" is deprecated
368
111a855e 369(D deprecated) You have used the attributes pragma to modify the "unique"
b7a2910f 370attribute on an array, hash or scalar reference. The :unique attribute has
a5547419
FC
371had no effect since Perl 5.8.8, and will be removed in a future release
372of Perl 5.
f1a3ce43 373
de42a5a9 374=item Bad arg length for %s, is %u, should be %d
a0d0e21e 375
be771a83
GS
376(F) You passed a buffer of the wrong size to one of msgctl(), semctl()
377or shmctl(). In C parlance, the correct sizes are, respectively,
5f05dabc 378S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and
a0d0e21e
LW
379S<sizeof(struct shmid_ds *)>.
380
7a95317d
GS
381=item Bad evalled substitution pattern
382
496a33f5 383(F) You've used the C</e> switch to evaluate the replacement for a
7a95317d
GS
384substitution, but perl found a syntax error in the code to evaluate,
385most likely an unexpected right brace '}'.
386
a0d0e21e
LW
387=item Bad filehandle: %s
388
be771a83
GS
389(F) A symbol was passed to something wanting a filehandle, but the
390symbol has no filehandle associated with it. Perhaps you didn't do an
391open(), or did it in another package.
a0d0e21e
LW
392
393=item Bad free() ignored
394
be771a83
GS
395(S malloc) An internal routine called free() on something that had never
396been malloc()ed in the first place. Mandatory, but can be disabled by
9ea8bc6d 397setting environment variable C<PERL_BADFREE> to 0.
33c8a3fe 398
9ea8bc6d 399This message can be seen quite often with DB_File on systems with "hard"
be771a83
GS
400dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB>
401which is left unnoticed if C<DB> uses I<forgiving> system malloc().
a0d0e21e 402
aa689395
PP
403=item Bad hash
404
405(P) One of the internal hash routines was passed a null HV pointer.
406
6df41af2
GS
407=item Badly placed ()'s
408
409(A) You've accidentally run your script through B<csh> instead
410of Perl. Check the #! line, or manually feed your script into
411Perl yourself.
412
a0d0e21e
LW
413=item Bad name after %s::
414
be771a83
GS
415(F) You started to name a symbol by using a package prefix, and then
416didn't finish the symbol. In particular, you can't interpolate outside
417of quotes, so
a0d0e21e
LW
418
419 $var = 'myvar';
420 $sym = mypack::$var;
421
422is not the same as
423
424 $var = 'myvar';
425 $sym = "mypack::$var";
426
88e1f1a2
JV
427=item Bad plugin affecting keyword '%s'
428
429(F) An extension using the keyword plugin mechanism violated the
430plugin API.
431
4ad56ec9
IZ
432=item Bad realloc() ignored
433
be771a83
GS
434(S malloc) An internal routine called realloc() on something that had
435never been malloc()ed in the first place. Mandatory, but can be disabled
4dcecea4 436by setting the environment variable C<PERL_BADFREE> to 1.
4ad56ec9 437
a0d0e21e
LW
438=item Bad symbol for array
439
440(P) An internal request asked to add an array entry to something that
441wasn't a symbol table entry.
442
4df3f177
SP
443=item Bad symbol for dirhandle
444
445(P) An internal request asked to add a dirhandle entry to something
446that wasn't a symbol table entry.
447
a0d0e21e
LW
448=item Bad symbol for filehandle
449
be771a83
GS
450(P) An internal request asked to add a filehandle entry to something
451that wasn't a symbol table entry.
a0d0e21e
LW
452
453=item Bad symbol for hash
454
455(P) An internal request asked to add a hash entry to something that
456wasn't a symbol table entry.
457
34d09196
GS
458=item Bareword found in conditional
459
be771a83
GS
460(W bareword) The compiler found a bareword where it expected a
461conditional, which often indicates that an || or && was parsed as part
462of the last argument of the previous construct, for example:
34d09196
GS
463
464 open FOO || die;
465
be771a83
GS
466It may also indicate a misspelled constant that has been interpreted as
467a bareword:
34d09196
GS
468
469 use constant TYPO => 1;
470 if (TYOP) { print "foo" }
471
472The C<strict> pragma is useful in avoiding such errors.
473
6df41af2
GS
474=item Bareword "%s" not allowed while "strict subs" in use
475
476(F) With "strict subs" in use, a bareword is only allowed as a
be771a83
GS
477subroutine identifier, in curly brackets or to the left of the "=>"
478symbol. Perhaps you need to predeclare a subroutine?
6df41af2
GS
479
480=item Bareword "%s" refers to nonexistent package
481
be771a83
GS
482(W bareword) You used a qualified bareword of the form C<Foo::>, but the
483compiler saw no other uses of that namespace before that point. Perhaps
484you need to predeclare a package?
6df41af2 485
a0d0e21e
LW
486=item BEGIN failed--compilation aborted
487
be771a83
GS
488(F) An untrapped exception was raised while executing a BEGIN
489subroutine. Compilation stops immediately and the interpreter is
490exited.
a0d0e21e 491
68dc0745
PP
492=item BEGIN not safe after errors--compilation aborted
493
494(F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which
be771a83
GS
495implies a C<BEGIN {}>) after one or more compilation errors had already
496occurred. Since the intended environment for the C<BEGIN {}> could not
497be guaranteed (due to the errors), and since subsequent code likely
498depends on its correct operation, Perl just gave up.
68dc0745 499
6df41af2
GS
500=item \1 better written as $1
501
be771a83
GS
502(W syntax) Outside of patterns, backreferences live on as variables.
503The use of backslashes is grandfathered on the right-hand side of a
504substitution, but stylistically it's better to use the variable form
505because other Perl programmers will expect it, and it works better if
506there are more than 9 backreferences.
6df41af2 507
252aa082
JH
508=item Binary number > 0b11111111111111111111111111111111 non-portable
509
e476b1b5 510(W portable) The binary number you specified is larger than 2**32-1
9e24b6e2
JH
511(4294967295) and therefore non-portable between systems. See
512L<perlport> for more on portability concerns.
252aa082 513
69282e91 514=item bind() on closed socket %s
a0d0e21e 515
be771a83
GS
516(W closed) You tried to do a bind on a closed socket. Did you forget to
517check the return value of your socket() call? See L<perlfunc/bind>.
a0d0e21e 518
c289d2f7
JH
519=item binmode() on closed filehandle %s
520
521(W unopened) You tried binmode() on a filehandle that was never opened.
4dcecea4 522Check your control flow and number of arguments.
c289d2f7 523
f866a7cd
FC
524=item "\b{" is deprecated; use "\b\{" instead
525
526=item "\B{" is deprecated; use "\B\{" instead
527
528(W deprecated, regexp) Use of an unescaped "{" immediately following a
529C<\b> or C<\B> is now deprecated so as to reserve its use for Perl
530itself in a future release.
531
c5a0f51a
JH
532=item Bit vector size > 32 non-portable
533
e476b1b5 534(W portable) Using bit vector sizes larger than 32 is non-portable.
c5a0f51a 535
4633a7c4
LW
536=item Bizarre copy of %s in %s
537
be771a83 538(P) Perl detected an attempt to copy an internal value that is not
4dcecea4 539copiable.
4633a7c4 540
f675dbe5
CB
541=item Buffer overflow in prime_env_iter: %s
542
be771a83
GS
543(W internal) A warning peculiar to VMS. While Perl was preparing to
544iterate over %ENV, it encountered a logical name or symbol definition
545which was too long, so it was truncated to the string shown.
f675dbe5 546
a0d0e21e
LW
547=item Callback called exit
548
4929bf7b 549(F) A subroutine invoked from an external package via call_sv()
a0d0e21e
LW
550exited by calling exit.
551
6df41af2 552=item %s() called too early to check prototype
f675dbe5 553
be771a83
GS
554(W prototype) You've called a function that has a prototype before the
555parser saw a definition or declaration for it, and Perl could not check
556that the call conforms to the prototype. You need to either add an
557early prototype declaration for the subroutine in question, or move the
558subroutine definition ahead of the call to get proper prototype
559checking. Alternatively, if you are certain that you're calling the
560function correctly, you may put an ampersand before the name to avoid
561the warning. See L<perlsub>.
f675dbe5 562
49704364 563=item Cannot compress integer in pack
0258719b
NC
564
565(F) An argument to pack("w",...) was too large to compress. The BER
566compressed integer format can only be used with positive integers, and you
567attempted to compress Infinity or a very large number (> 1e308).
568See L<perlfunc/pack>.
569
49704364 570=item Cannot compress negative numbers in pack
0258719b
NC
571
572(F) An argument to pack("w",...) was negative. The BER compressed integer
573format can only be used with positive integers. See L<perlfunc/pack>.
574
5c1f4d79
NC
575=item Cannot convert a reference to %s to typeglob
576
577(F) You manipulated Perl's symbol table directly, stored a reference in it,
578then tried to access that symbol via conventional Perl syntax. The access
579triggers Perl to autovivify that typeglob, but it there is no legal conversion
580from that type of reference to a typeglob.
581
ba2fdce6
NC
582=item Cannot copy to %s in %s
583
584(P) Perl detected an attempt to copy a value to an internal type that cannot
4dcecea4 585be directly assigned to.
ba2fdce6 586
b5d97229
RGS
587=item Cannot find encoding "%s"
588
589(S io) You tried to apply an encoding that did not exist to a filehandle,
590either with open() or binmode().
591
96ebfdd7
RK
592=item Can only compress unsigned integers in pack
593
594(F) An argument to pack("w",...) was not an integer. The BER compressed
595integer format can only be used with positive integers, and you attempted
596to compress something else. See L<perlfunc/pack>.
597
a0d0e21e
LW
598=item Can't bless non-reference value
599
600(F) Only hard references may be blessed. This is how Perl "enforces"
601encapsulation of objects. See L<perlobj>.
602
dc57907a
RGS
603=item Can't "break" in a loop topicalizer
604
0d863452
RH
605(F) You called C<break>, but you're in a C<foreach> block rather than
606a C<given> block. You probably meant to use C<next> or C<last>.
607
608=item Can't "break" outside a given block
dc57907a 609
0d863452
RH
610(F) You called C<break>, but you're not inside a C<given> block.
611
6df41af2
GS
612=item Can't call method "%s" on an undefined value
613
614(F) You used the syntax of a method call, but the slot filled by the
be771a83
GS
615object reference or package name contains an undefined value. Something
616like this will reproduce the error:
6df41af2
GS
617
618 $BADREF = undef;
619 process $BADREF 1,2,3;
620 $BADREF->process(1,2,3);
621
a0d0e21e
LW
622=item Can't call method "%s" on unblessed reference
623
54310121 624(F) A method call must know in what package it's supposed to run. It
be771a83
GS
625ordinarily finds this out from the object reference you supply, but you
626didn't supply an object reference in this case. A reference isn't an
627object reference until it has been blessed. See L<perlobj>.
a0d0e21e
LW
628
629=item Can't call method "%s" without a package or object reference
630
631(F) You used the syntax of a method call, but the slot filled by the
be771a83
GS
632object reference or package name contains an expression that returns a
633defined value which is neither an object reference nor a package name.
72b5445b
GS
634Something like this will reproduce the error:
635
636 $BADREF = 42;
637 process $BADREF 1,2,3;
638 $BADREF->process(1,2,3);
639
a0d0e21e
LW
640=item Can't chdir to %s
641
642(F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory
643that you can chdir to, possibly because it doesn't exist.
644
0545a864 645=item Can't check filesystem of script "%s" for nosuid
104d25b7 646
be771a83
GS
647(P) For some reason you can't check the filesystem of the script for
648nosuid.
104d25b7 649
22e74366 650=item Can't coerce %s to %s in %s
a0d0e21e
LW
651
652(F) Certain types of SVs, in particular real symbol table entries
55497cff 653(typeglobs), can't be forced to stop being what they are. So you can't
a0d0e21e
LW
654say things like:
655
656 *foo += 1;
657
658You CAN say
659
660 $foo = *foo;
661 $foo += 1;
662
663but then $foo no longer contains a glob.
664
0d863452 665=item Can't "continue" outside a when block
dc57907a 666
0d863452
RH
667(F) You called C<continue>, but you're not inside a C<when>
668or C<default> block.
669
a0d0e21e
LW
670=item Can't create pipe mailbox
671
be771a83
GS
672(P) An error peculiar to VMS. The process is suffering from exhausted
673quotas or other plumbing problems.
a0d0e21e 674
eb64745e
GS
675=item Can't declare %s in "%s"
676
30c282f6
NC
677(F) Only scalar, array, and hash variables may be declared as "my", "our" or
678"state" variables. They must have ordinary identifiers as names.
a0d0e21e 679
6df41af2
GS
680=item Can't do inplace edit: %s is not a regular file
681
be771a83
GS
682(S inplace) You tried to use the B<-i> switch on a special file, such as
683a file in /dev, or a FIFO. The file was ignored.
6df41af2 684
a0d0e21e
LW
685=item Can't do inplace edit on %s: %s
686
be771a83
GS
687(S inplace) The creation of the new file failed for the indicated
688reason.
a0d0e21e 689
54310121 690=item Can't do inplace edit without backup
a0d0e21e 691
be771a83
GS
692(F) You're on a system such as MS-DOS that gets confused if you try
693reading from a deleted (but still opened) file. You have to say
694C<-i.bak>, or some such.
a0d0e21e 695
10f9c03d 696=item Can't do inplace edit: %s would not be unique
a0d0e21e 697
e476b1b5 698(S inplace) Your filesystem does not support filenames longer than 14
10f9c03d
CK
699characters and Perl was unable to create a unique filename during
700inplace editing with the B<-i> switch. The file was ignored.
a0d0e21e 701
7253e4e3 702=item Can't do {n,m} with n > m in regex; marked by <-- HERE in m/%s/
a0d0e21e 703
b45f050a 704(F) Minima must be less than or equal to maxima. If you really want your
7253e4e3 705regexp to match something 0 times, just put {0}. The <-- HERE shows in the
b45f050a 706regular expression about where the problem was discovered. See L<perlre>.
a0d0e21e 707
a0d0e21e
LW
708=item Can't do waitpid with flags
709
be771a83
GS
710(F) This machine doesn't have either waitpid() or wait4(), so only
711waitpid() without flags is emulated.
a0d0e21e 712
a0d0e21e
LW
713=item Can't emulate -%s on #! line
714
be771a83
GS
715(F) The #! line specifies a switch that doesn't make sense at this
716point. For example, it'd be kind of silly to put a B<-x> on the #!
717line.
a0d0e21e 718
1109a392
MHM
719=item Can't %s %s-endian %ss on this platform
720
721(F) Your platform's byte-order is neither big-endian nor little-endian,
722or it has a very strange pointer size. Packing and unpacking big- or
723little-endian floating point values and pointers may not be possible.
724See L<perlfunc/pack>.
725
a0d0e21e
LW
726=item Can't exec "%s": %s
727
d1be9408 728(W exec) A system(), exec(), or piped open call could not execute the
be771a83
GS
729named program for the indicated reason. Typical reasons include: the
730permissions were wrong on the file, the file wasn't found in
731C<$ENV{PATH}>, the executable in question was compiled for another
732architecture, or the #! line in a script points to an interpreter that
733can't be run for similar reasons. (Or maybe your system doesn't support
734#! at all.)
a0d0e21e
LW
735
736=item Can't exec %s
737
be771a83
GS
738(F) Perl was trying to execute the indicated program for you because
739that's what the #! line said. If that's not what you wanted, you may
740need to mention "perl" on the #! line somewhere.
a0d0e21e
LW
741
742=item Can't execute %s
743
be771a83
GS
744(F) You used the B<-S> switch, but the copies of the script to execute
745found in the PATH did not have correct permissions.
2a92aaa0 746
6df41af2 747=item Can't find an opnumber for "%s"
2a92aaa0 748
be771a83
GS
749(F) A string of a form C<CORE::word> was given to prototype(), but there
750is no builtin with the name C<word>.
6df41af2 751
56ca2fc0
JH
752=item Can't find %s character property "%s"
753
754(F) You used C<\p{}> or C<\P{}> but the character property by that name
e1b711da
KW
755could not be found. Maybe you misspelled the name of the property?
756See L<perluniprops/Properties accessible through \p{} and \P{}>
757for a complete list of available properties.
56ca2fc0 758
6df41af2
GS
759=item Can't find label %s
760
be771a83
GS
761(F) You said to goto a label that isn't mentioned anywhere that it's
762possible for us to go to. See L<perlfunc/goto>.
2a92aaa0
GS
763
764=item Can't find %s on PATH
765
be771a83
GS
766(F) You used the B<-S> switch, but the script to execute could not be
767found in the PATH.
a0d0e21e 768
6df41af2 769=item Can't find %s on PATH, '.' not in PATH
a0d0e21e 770
be771a83
GS
771(F) You used the B<-S> switch, but the script to execute could not be
772found in the PATH, or at least not with the correct permissions. The
773script exists in the current directory, but PATH prohibits running it.
a0d0e21e
LW
774
775=item Can't find string terminator %s anywhere before EOF
776
be771a83
GS
777(F) Perl strings can stretch over multiple lines. This message means
778that the closing delimiter was omitted. Because bracketed quotes count
779nesting levels, the following is missing its final parenthesis:
a0d0e21e 780
fb73857a
PP
781 print q(The character '(' starts a side comment.);
782
97b3d10f 783If you're getting this error from a here-document, you may have
b6b8cb97
FC
784included unseen whitespace before or after your closing tag or there
785may not be a linebreak after it. A good programmer's editor will have
786a way to help you find these characters (or lack of characters). See
787L<perlop> for the full details on here-documents.
a0d0e21e 788
660a4616
ST
789=item Can't find Unicode property definition "%s"
790
5f8ad6b6
FC
791(F) You may have tried to use C<\p> which means a Unicode
792property (for example C<\p{Lu}> matches all uppercase
793letters). If you did mean to use a Unicode property, see
e1b711da 794L<perluniprops/Properties accessible through \p{} and \P{}>
5f8ad6b6
FC
795for a complete list of available properties. If you didn't
796mean to use a Unicode property, escape the C<\p>, either by C<\\p>
797(just the C<\p>) or by C<\Q\p> (the rest of the string, or
798until C<\E>).
660a4616 799
b3647a36 800=item Can't fork: %s
a0d0e21e 801
be771a83
GS
802(F) A fatal error occurred while trying to fork while opening a
803pipeline.
a0d0e21e 804
b3647a36
SR
805=item Can't fork, trying again in 5 seconds
806
c973c02e 807(W pipe) A fork in a piped open failed with EAGAIN and will be retried
b3647a36
SR
808after five seconds.
809
748a9306
LW
810=item Can't get filespec - stale stat buffer?
811
be771a83
GS
812(S) A warning peculiar to VMS. This arises because of the difference
813between access checks under VMS and under the Unix model Perl assumes.
814Under VMS, access checks are done by filename, rather than by bits in
815the stat buffer, so that ACLs and other protections can be taken into
816account. Unfortunately, Perl assumes that the stat buffer contains all
817the necessary information, and passes it, instead of the filespec, to
2fe2bdfd 818the access-checking routine. It will try to retrieve the filespec using
be771a83
GS
819the device name and FID present in the stat buffer, but this works only
820if you haven't made a subsequent call to the CRTL stat() routine,
821because the device name is overwritten with each call. If this warning
2fe2bdfd
FC
822appears, the name lookup failed, and the access-checking routine gave up
823and returned FALSE, just to be conservative. (Note: The access-checking
be771a83
GS
824routine knows about the Perl C<stat> operator and file tests, so you
825shouldn't ever see this warning in response to a Perl command; it arises
826only if some internal code takes stat buffers lightly.)
748a9306 827
a0d0e21e
LW
828=item Can't get pipe mailbox device name
829
be771a83
GS
830(P) An error peculiar to VMS. After creating a mailbox to act as a
831pipe, Perl can't retrieve its name for later use.
a0d0e21e
LW
832
833=item Can't get SYSGEN parameter value for MAXBUF
834
748a9306
LW
835(P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
836mailbox buffers to be, and didn't get an answer.
a0d0e21e 837
6df41af2 838=item Can't "goto" into the middle of a foreach loop
a0d0e21e 839
be771a83
GS
840(F) A "goto" statement was executed to jump into the middle of a foreach
841loop. You can't get there from here. See L<perlfunc/goto>.
6df41af2
GS
842
843=item Can't "goto" out of a pseudo block
844
be771a83
GS
845(F) A "goto" statement was executed to jump out of what might look like
846a block, except that it isn't a proper block. This usually occurs if
847you tried to jump out of a sort() block or subroutine, which is a no-no.
848See L<perlfunc/goto>.
a0d0e21e 849
9850bf21 850=item Can't goto subroutine from a sort sub (or similar callback)
cd299c6e 851
9850bf21
RH
852(F) The "goto subroutine" call can't be used to jump out of the
853comparison sub for a sort(), or from a similar callback (such
854as the reduce() function in List::Util).
855
c74ace89 856=item Can't goto subroutine from an eval-%s
b150fb22 857
be771a83 858(F) The "goto subroutine" call can't be used to jump out of an eval
c74ace89 859"string" or block.
b150fb22 860
6df41af2
GS
861=item Can't goto subroutine outside a subroutine
862
be771a83
GS
863(F) The deeply magical "goto subroutine" call can only replace one
864subroutine call for another. It can't manufacture one out of whole
865cloth. In general you should be calling it out of only an AUTOLOAD
866routine anyway. See L<perlfunc/goto>.
6df41af2 867
0b5b802d
GS
868=item Can't ignore signal CHLD, forcing to default
869
be771a83
GS
870(W signal) Perl has detected that it is being run with the SIGCHLD
871signal (sometimes known as SIGCLD) disabled. Since disabling this
872signal will interfere with proper determination of exit status of child
873processes, Perl has reset the signal to its default value. This
874situation typically indicates that the parent program under which Perl
875may be running (e.g. cron) is being very careless.
0b5b802d 876
e2c0f81f
DG
877=item Can't kill a non-numeric process ID
878
879(F) Process identifiers must be (signed) integers. It is a fatal error to
880attempt to kill() an undefined, empty-string or otherwise non-numeric
881process identifier.
882
6df41af2 883=item Can't "last" outside a loop block
4633a7c4 884
6df41af2 885(F) A "last" statement was executed to break out of the current block,
be771a83
GS
886except that there's this itty bitty problem called there isn't a current
887block. Note that an "if" or "else" block doesn't count as a "loopish"
888block, as doesn't a block given to sort(), map() or grep(). You can
889usually double the curlies to get the same effect though, because the
890inner curlies will be considered a block that loops once. See
891L<perlfunc/last>.
4633a7c4 892
2c7d6b9c
RGS
893=item Can't linearize anonymous symbol table
894
895(F) Perl tried to calculate the method resolution order (MRO) of a
896package, but failed because the package stash has no name.
897
b8170e59
JB
898=item Can't load '%s' for module %s
899
900(F) The module you tried to load failed to load a dynamic extension. This
901may either mean that you upgraded your version of perl to one that is
902incompatible with your old dynamic extensions (which is known to happen
903between major versions of perl), or (more likely) that your dynamic
16d98ec5 904extension was built against an older version of the library that is
b8170e59
JB
905installed on your system. You may need to rebuild your old dynamic
906extensions.
907
748a9306
LW
908=item Can't localize lexical variable %s
909
2ba9eb46 910(F) You used local on a variable name that was previously declared as a
30c282f6 911lexical variable using "my" or "state". This is not allowed. If you want to
748a9306
LW
912localize a package variable of the same name, qualify it with the
913package name.
914
6df41af2 915=item Can't localize through a reference
4727527e 916
6df41af2
GS
917(F) You said something like C<local $$ref>, which Perl can't currently
918handle, because when it goes to restore the old value of whatever $ref
be771a83 919pointed to after the scope of the local() is finished, it can't be sure
64977eb6 920that $ref will still be a reference.
4727527e 921
ea071790 922=item Can't locate %s
ec889f3a
GS
923
924(F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be
925found. Perl looks for the file in all the locations mentioned in @INC,
be771a83
GS
926unless the file name included the full path to the file. Perhaps you
927need to set the PERL5LIB or PERL5OPT environment variable to say where
928the extra library is, or maybe the script needs to add the library name
929to @INC. Or maybe you just misspelled the name of the file. See
930L<perlfunc/require> and L<lib>.
a0d0e21e 931
6df41af2
GS
932=item Can't locate auto/%s.al in @INC
933
be771a83
GS
934(F) A function (or method) was called in a package which allows
935autoload, but there is no function to autoload. Most probable causes
936are a misprint in a function/method name or a failure to C<AutoSplit>
937the file, say, by doing C<make install>.
6df41af2 938
b8170e59
JB
939=item Can't locate loadable object for module %s in @INC
940
941(F) The module you loaded is trying to load an external library, like
942for example, C<foo.so> or C<bar.dll>, but the L<DynaLoader> module was
943unable to locate this library. See L<DynaLoader>.
944
a0d0e21e
LW
945=item Can't locate object method "%s" via package "%s"
946
947(F) You called a method correctly, and it correctly indicated a package
948functioning as a class, but that package doesn't define that particular
2ba9eb46 949method, nor does any of its base classes. See L<perlobj>.
a0d0e21e
LW
950
951=item Can't locate package %s for @%s::ISA
952
be771a83
GS
953(W syntax) The @ISA array contained the name of another package that
954doesn't seem to exist.
a0d0e21e 955
2f7da168
RK
956=item Can't locate PerlIO%s
957
958(F) You tried to use in open() a PerlIO layer that does not exist,
959e.g. open(FH, ">:nosuchlayer", "somefile").
960
3e3baf6d
TB
961=item Can't make list assignment to \%ENV on this system
962
be771a83
GS
963(F) List assignment to %ENV is not supported on some systems, notably
964VMS.
3e3baf6d 965
a0d0e21e
LW
966=item Can't modify %s in %s
967
be771a83
GS
968(F) You aren't allowed to assign to the item indicated, or otherwise try
969to change it, such as with an auto-increment.
a0d0e21e 970
54310121 971=item Can't modify nonexistent substring
a0d0e21e
LW
972
973(P) The internal routine that does assignment to a substr() was handed
974a NULL.
975
6df41af2
GS
976=item Can't modify non-lvalue subroutine call
977
978(F) Subroutines meant to be used in lvalue context should be declared as
2fe2bdfd 979such. See L<perlsub/"Lvalue subroutines">.
6df41af2 980
5f05dabc 981=item Can't msgrcv to read-only var
a0d0e21e 982
5f05dabc 983(F) The target of a msgrcv must be modifiable to be used as a receive
a0d0e21e
LW
984buffer.
985
6df41af2
GS
986=item Can't "next" outside a loop block
987
988(F) A "next" statement was executed to reiterate the current block, but
989there isn't a current block. Note that an "if" or "else" block doesn't
be771a83
GS
990count as a "loopish" block, as doesn't a block given to sort(), map() or
991grep(). You can usually double the curlies to get the same effect
992though, because the inner curlies will be considered a block that loops
993once. See L<perlfunc/next>.
6df41af2 994
a0d0e21e
LW
995=item Can't open %s: %s
996
c47ff5f1 997(S inplace) The implicit opening of a file through use of the C<< <> >>
08e9d68e
DD
998filehandle, either implicitly under the C<-n> or C<-p> command-line
999switches, or explicitly, failed for the indicated reason. Usually this
be771a83
GS
1000is because you don't have read permission for a file which you named on
1001the command line.
a0d0e21e 1002
9a869a14
RGS
1003=item Can't open a reference
1004
1005(W io) You tried to open a scalar reference for reading or writing,
2fe2bdfd 1006using the 3-arg open() syntax:
9a869a14
RGS
1007
1008 open FH, '>', $ref;
1009
1010but your version of perl is compiled without perlio, and this form of
1011open is not supported.
1012
a0d0e21e
LW
1013=item Can't open bidirectional pipe
1014
be771a83
GS
1015(W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported.
1016You can try any of several modules in the Perl library to do this, such
1017as IPC::Open2. Alternately, direct the pipe's output to a file using
1018">", and then read it in under a different file handle.
a0d0e21e 1019
748a9306
LW
1020=item Can't open error file %s as stderr
1021
be771a83
GS
1022(F) An error peculiar to VMS. Perl does its own command line
1023redirection, and couldn't open the file specified after '2>' or '2>>' on
1024the command line for writing.
748a9306
LW
1025
1026=item Can't open input file %s as stdin
1027
be771a83
GS
1028(F) An error peculiar to VMS. Perl does its own command line
1029redirection, and couldn't open the file specified after '<' on the
1030command line for reading.
748a9306
LW
1031
1032=item Can't open output file %s as stdout
1033
be771a83
GS
1034(F) An error peculiar to VMS. Perl does its own command line
1035redirection, and couldn't open the file specified after '>' or '>>' on
1036the command line for writing.
748a9306
LW
1037
1038=item Can't open output pipe (name: %s)
1039
be771a83
GS
1040(P) An error peculiar to VMS. Perl does its own command line
1041redirection, and couldn't open the pipe into which to send data destined
1042for stdout.
748a9306 1043
2b8ca739 1044=item Can't open perl script%s
a0d0e21e
LW
1045
1046(F) The script you specified can't be opened for the indicated reason.
1047
fa3aa65a
JC
1048If you're debugging a script that uses #!, and normally relies on the
1049shell's $PATH search, the -S option causes perl to do that search, so
1050you don't have to type the path or C<`which $scriptname`>.
1051
6df41af2
GS
1052=item Can't read CRTL environ
1053
1054(S) A warning peculiar to VMS. Perl tried to read an element of %ENV
1055from the CRTL's internal environment array and discovered the array was
1056missing. You need to figure out where your CRTL misplaced its environ
be771a83
GS
1057or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not
1058searched.
6df41af2 1059
6df41af2
GS
1060=item Can't "redo" outside a loop block
1061
1062(F) A "redo" statement was executed to restart the current block, but
1063there isn't a current block. Note that an "if" or "else" block doesn't
1064count as a "loopish" block, as doesn't a block given to sort(), map()
1065or grep(). You can usually double the curlies to get the same effect
1066though, because the inner curlies will be considered a block that
1067loops once. See L<perlfunc/redo>.
1068
64977eb6 1069=item Can't remove %s: %s, skipping file
10f9c03d 1070
be771a83
GS
1071(S inplace) You requested an inplace edit without creating a backup
1072file. Perl was unable to remove the original file to replace it with
1073the modified file. The file was left unmodified.
10f9c03d 1074
a0d0e21e
LW
1075=item Can't rename %s to %s: %s, skipping file
1076
e476b1b5 1077(S inplace) The rename done by the B<-i> switch failed for some reason,
10f9c03d 1078probably because you don't have write permission to the directory.
a0d0e21e 1079
748a9306
LW
1080=item Can't reopen input pipe (name: %s) in binary mode
1081
be771a83
GS
1082(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried
1083to reopen it to accept binary data. Alas, it failed.
748a9306 1084
fe13d51d 1085=item Can't resolve method "%s" overloading "%s" in package "%s"
6df41af2 1086
be771a83
GS
1087(F|P) Error resolving overloading specified by a method name (as opposed
1088to a subroutine reference): no such method callable via the package. If
2fe2bdfd 1089the method name is C<???>, this is an internal error.
6df41af2 1090
cd06dffe
GS
1091=item Can't return %s from lvalue subroutine
1092
be771a83
GS
1093(F) Perl detected an attempt to return illegal lvalues (such as
1094temporary or readonly values) from a subroutine used as an lvalue. This
1095is not allowed.
cd06dffe 1096
96ebfdd7
RK
1097=item Can't return outside a subroutine
1098
1099(F) The return statement was executed in mainline code, that is, where
1100there was no subroutine call to return out of. See L<perlsub>.
1101
78f9721b
SM
1102=item Can't return %s to lvalue scalar context
1103
1104(F) You tried to return a complete array or hash from an lvalue subroutine,
1105but you called the subroutine in a way that made Perl think you meant
1106to return only one value. You probably meant to write parentheses around
1107the call to the subroutine, which tell Perl that the call should be in
1108list context.
1109
a0d0e21e
LW
1110=item Can't stat script "%s"
1111
be771a83
GS
1112(P) For some reason you can't fstat() the script even though you have it
1113open already. Bizarre.
a0d0e21e 1114
a0d0e21e
LW
1115=item Can't take log of %g
1116
fb73857a
PP
1117(F) For ordinary real numbers, you can't take the logarithm of a
1118negative number or zero. There's a Math::Complex package that comes
be771a83
GS
1119standard with Perl, though, if you really want to do that for the
1120negative numbers.
a0d0e21e
LW
1121
1122=item Can't take sqrt of %g
1123
1124(F) For ordinary real numbers, you can't take the square root of a
fb73857a
PP
1125negative number. There's a Math::Complex package that comes standard
1126with Perl, though, if you really want to do that.
a0d0e21e
LW
1127
1128=item Can't undef active subroutine
1129
1130(F) You can't undefine a routine that's currently running. You can,
1131however, redefine it while it's running, and you can even undef the
1132redefined subroutine while the old routine is running. Go figure.
1133
c81225bc 1134=item Can't upgrade %s (%d) to %d
a0d0e21e 1135
be771a83
GS
1136(P) The internal sv_upgrade routine adds "members" to an SV, making it
1137into a more specialized kind of SV. The top several SV types are so
1138specialized, however, that they cannot be interconverted. This message
1139indicates that such a conversion was attempted.
a0d0e21e 1140
1db89ea5
BS
1141=item Can't use anonymous symbol table for method lookup
1142
e27ad1f2 1143(F) The internal routine that does method lookup was handed a symbol
1db89ea5
BS
1144table that doesn't have a name. Symbol tables can become anonymous
1145for example by undefining stashes: C<undef %Some::Package::>.
1146
96ebfdd7
RK
1147=item Can't use an undefined value as %s reference
1148
1149(F) A value used as either a hard reference or a symbolic reference must
1150be a defined value. This helps to delurk some insidious errors.
1151
6df41af2
GS
1152=item Can't use bareword ("%s") as %s ref while "strict refs" in use
1153
be771a83
GS
1154(F) Only hard references are allowed by "strict refs". Symbolic
1155references are disallowed. See L<perlref>.
6df41af2 1156
90b75b61 1157=item Can't use %! because Errno.pm is not available
1d2dff63
GS
1158
1159(F) The first time the %! hash is used, perl automatically loads the
1160Errno.pm module. The Errno module is expected to tie the %! hash to
1161provide symbolic names for C<$!> errno values.
1162
1109a392
MHM
1163=item Can't use both '<' and '>' after type '%c' in %s
1164
1165(F) A type cannot be forced to have both big-endian and little-endian
1166byte-order at the same time, so this combination of modifiers is not
1167allowed. See L<perlfunc/pack>.
1168
6df41af2
GS
1169=item Can't use %s for loop variable
1170
be771a83
GS
1171(F) Only a simple scalar variable may be used as a loop variable on a
1172foreach.
6df41af2 1173
aab6a793 1174=item Can't use global %s in "%s"
6df41af2 1175
be771a83
GS
1176(F) You tried to declare a magical variable as a lexical variable. This
1177is not allowed, because the magic can be tied to only one location
1178(namely the global variable) and it would be incredibly confusing to
1179have variables in your program that looked like magical variables but
6df41af2
GS
1180weren't.
1181
6d3b25aa
RGS
1182=item Can't use '%c' in a group with different byte-order in %s
1183
1184(F) You attempted to force a different byte-order on a type
1185that is already inside a group with a byte-order modifier.
1186For example you cannot force little-endianness on a type that
1187is inside a big-endian group.
1188
c07a80fd
PP
1189=item Can't use "my %s" in sort comparison
1190
1191(F) The global variables $a and $b are reserved for sort comparisons.
c47ff5f1 1192You mentioned $a or $b in the same line as the <=> or cmp operator,
c07a80fd
PP
1193and the variable had earlier been declared as a lexical variable.
1194Either qualify the sort variable with the package name, or rename the
1195lexical variable.
1196
a0d0e21e
LW
1197=item Can't use %s ref as %s ref
1198
1199(F) You've mixed up your reference types. You have to dereference a
1200reference of the type needed. You can use the ref() function to
1201test the type of the reference, if need be.
1202
748a9306 1203=item Can't use string ("%s") as %s ref while "strict refs" in use
a0d0e21e 1204
be771a83
GS
1205(F) Only hard references are allowed by "strict refs". Symbolic
1206references are disallowed. See L<perlref>.
a0d0e21e 1207
748a9306
LW
1208=item Can't use subscript on %s
1209
1210(F) The compiler tried to interpret a bracketed expression as a
1211subscript. But to the left of the brackets was an expression that
209e7cf1 1212didn't look like a hash or array reference, or anything else subscriptable.
748a9306 1213
6df41af2
GS
1214=item Can't use \%c to mean $%c in expression
1215
75b44862
GS
1216(W syntax) In an ordinary expression, backslash is a unary operator that
1217creates a reference to its argument. The use of backslash to indicate a
1218backreference to a matched substring is valid only as part of a regular
be771a83
GS
1219expression pattern. Trying to do this in ordinary Perl code produces a
1220value that prints out looking like SCALAR(0xdecaf). Use the $1 form
1221instead.
6df41af2 1222
0d863452 1223=item Can't use "when" outside a topicalizer
dc57907a 1224
0d863452
RH
1225(F) You have used a when() block that is neither inside a C<foreach>
1226loop nor a C<given> block. (Note that this error is issued on exit
1227from the C<when> block, so you won't get the error if the match fails,
1228or if you use an explicit C<continue>.)
1229
810b8aa5
GS
1230=item Can't weaken a nonreference
1231
1232(F) You attempted to weaken something that was not a reference. Only
1233references can be weakened.
1234
5f05dabc 1235=item Can't x= to read-only value
a0d0e21e 1236
be771a83
GS
1237(F) You tried to repeat a constant value (often the undefined value)
1238with an assignment operator, which implies modifying the value itself.
a0d0e21e
LW
1239Perhaps you need to copy the value to a temporary, and repeat that.
1240
4a68bf9d 1241=item Character following "\c" must be ASCII
f9d13529 1242
17a3df4c
KW
1243(F|W deprecated, syntax) In C<\cI<X>>, I<X> must be an ASCII character.
1244It is planned to make this fatal in all instances in Perl 5.16. In the
1245cases where it isn't fatal, the character this evaluates to is
1246derived by exclusive or'ing the code point of this character with 0x40.
1247
1248Note that non-alphabetic ASCII characters are discouraged here as well.
f9d13529 1249
f337b084 1250=item Character in 'C' format wrapped in pack
ac7cd81a
SC
1251
1252(W pack) You said
1253
1254 pack("C", $x)
1255
1256where $x is either less than 0 or more than 255; the C<"C"> format is
1257only for encoding native operating system characters (ASCII, EBCDIC,
1258and so on) and not for Unicode characters, so Perl behaved as if you meant
1259
1260 pack("C", $x & 255)
1261
1262If you actually want to pack Unicode codepoints, use the C<"U"> format
1263instead.
1264
f337b084
TH
1265=item Character in 'W' format wrapped in pack
1266
1267(W pack) You said
1268
1269 pack("U0W", $x)
1270
1271where $x is either less than 0 or more than 255. However, C<U0>-mode expects
1272all values to fall in the interval [0, 255], so Perl behaved as if you
1273meant:
1274
1275 pack("U0W", $x & 255)
1276
1277=item Character in 'c' format wrapped in pack
ac7cd81a
SC
1278
1279(W pack) You said
1280
1281 pack("c", $x)
1282
1283where $x is either less than -128 or more than 127; the C<"c"> format
1284is only for encoding native operating system characters (ASCII, EBCDIC,
1285and so on) and not for Unicode characters, so Perl behaved as if you meant
1286
1287 pack("c", $x & 255);
1288
1289If you actually want to pack Unicode codepoints, use the C<"U"> format
1290instead.
1291
f337b084
TH
1292=item Character in '%c' format wrapped in unpack
1293
1294(W unpack) You tried something like
1295
1296 unpack("H", "\x{2a1}")
1297
1a147d38 1298where the format expects to process a byte (a character with a value
f337b084
TH
1299below 256), but a higher value was provided instead. Perl uses the value
1300modulus 256 instead, as if you had provided:
1301
1302 unpack("H", "\x{a1}")
1303
1304=item Character(s) in '%c' format wrapped in pack
1305
1306(W pack) You tried something like
1307
1308 pack("u", "\x{1f3}b")
1309
1a147d38
YO
1310where the format expects to process a sequence of bytes (character with a
1311value below 256), but some of the characters had a higher value. Perl
f337b084
TH
1312uses the character values modulus 256 instead, as if you had provided:
1313
1314 pack("u", "\x{f3}b")
1315
1316=item Character(s) in '%c' format wrapped in unpack
1317
1318(W unpack) You tried something like
1319
1320 unpack("s", "\x{1f3}b")
1321
1a147d38
YO
1322where the format expects to process a sequence of bytes (character with a
1323value below 256), but some of the characters had a higher value. Perl
f337b084
TH
1324uses the character values modulus 256 instead, as if you had provided:
1325
1326 unpack("s", "\x{f3}b")
1327
f866a7cd
FC
1328=item "\c{" is deprecated and is more clearly written as ";"
1329
1330(D deprecated, syntax) The C<\cI<X>> construct is intended to be a way
1331to specify non-printable characters. You used it with a "{" which
1332evaluates to ";", which is printable. It is planned to remove the
1333ability to specify a semi-colon this way in Perl 5.16. Just use a
1334semi-colon or a backslash-semi-colon without the "\c".
1335
1336=item "\c%c" is more clearly written simply as "%s"
1337
1338(W syntax) The C<\cI<X>> construct is intended to be a way to specify
1339non-printable characters. You used it for a printable one, which is better
1340written as simply itself, perhaps preceded by a backslash for non-word
1341characters.
1342
96ebfdd7
RK
1343=item close() on unopened filehandle %s
1344
1345(W unopened) You tried to close a filehandle that was never opened.
1346
abc7ecad
SP
1347=item closedir() attempted on invalid dirhandle %s
1348
1349(W io) The dirhandle you tried to close is either closed or not really
1350a dirhandle. Check your control flow.
1351
541ed3a9
FC
1352=item Closure prototype called
1353
1354(F) If a closure has attributes, the subroutine passed to an attribute
1355handler is the prototype that is cloned when a new closure is created.
1356This subroutine cannot be called.
1357
49704364
LW
1358=item Code missing after '/'
1359
1360(F) You had a (sub-)template that ends with a '/'. There must be another
1361template code following the slash. See L<perlfunc/pack>.
1362
0876b9a0
KW
1363=item Code point 0x%X is not Unicode, may not be portable
1364
9ae3ac1a
KW
1365=item Code point 0x%X is not Unicode, no properties match it; all inverse properties do
1366
8457b38f 1367(W utf8, non_unicode) You had a code point above the Unicode maximum of U+10FFFF.
0876b9a0
KW
1368
1369Perl allows strings to contain a superset of Unicode code
1370points, up to the limit of what is storable in an unsigned integer on
1371your system, but these may not be accepted by other languages/systems.
1372At one time, it was legal in some standards to have code points up to
13730x7FFF_FFFF, but not higher. Code points above 0xFFFF_FFFF require
1374larger than a 32 bit word.
1375
9ae3ac1a
KW
1376None of the Unicode or Perl-defined properties will match a non-Unicode
1377code point. For example,
1378
1379 chr(0x7FF_FFFF) =~ /\p{Any}/
1380
1381will not match, because the code point is not in Unicode. But
1382
1383 chr(0x7FF_FFFF) =~ /\P{Any}/
1384
1385will match.
1386
6df41af2
GS
1387=item %s: Command not found
1388
be771a83
GS
1389(A) You've accidentally run your script through B<csh> instead of Perl.
1390Check the #! line, or manually feed your script into Perl yourself.
6df41af2 1391
7a2e2cd6
PP
1392=item Compilation failed in require
1393
1394(F) Perl could not compile a file specified in a C<require> statement.
be771a83
GS
1395Perl uses this generic message when none of the errors that it
1396encountered were severe enough to halt compilation immediately.
7a2e2cd6 1397
c3464db5
DD
1398=item Complex regular subexpression recursion limit (%d) exceeded
1399
be771a83
GS
1400(W regexp) The regular expression engine uses recursion in complex
1401situations where back-tracking is required. Recursion depth is limited
1402to 32766, or perhaps less in architectures where the stack cannot grow
1403arbitrarily. ("Simple" and "medium" situations are handled without
1404recursion and are not subject to a limit.) Try shortening the string
1405under examination; looping in Perl code (e.g. with C<while>) rather than
1406in the regular expression engine; or rewriting the regular expression so
c2e66d9e 1407that it is simpler or backtracks less. (See L<perlfaq2> for information
be771a83 1408on I<Mastering Regular Expressions>.)
c3464db5 1409
38875929
DM
1410=item cond_broadcast() called on unlocked variable
1411
1412(W threads) Within a thread-enabled program, you tried to call
1413cond_broadcast() on a variable which wasn't locked. The cond_broadcast()
a568ca76 1414function is used to wake up another thread that is waiting in a
38875929 1415cond_wait(). To ensure that the signal isn't sent before the other thread
a568ca76
FC
1416has a chance to enter the wait, it is usual for the signaling thread
1417first to wait for a lock on variable. This lock attempt will only succeed
38875929
DM
1418after the other thread has entered cond_wait() and thus relinquished the
1419lock.
1420
38875929
DM
1421=item cond_signal() called on unlocked variable
1422
1423(W threads) Within a thread-enabled program, you tried to call
1424cond_signal() on a variable which wasn't locked. The cond_signal()
a568ca76 1425function is used to wake up another thread that is waiting in a
38875929 1426cond_wait(). To ensure that the signal isn't sent before the other thread
a568ca76
FC
1427has a chance to enter the wait, it is usual for the signaling thread
1428first to wait for a lock on variable. This lock attempt will only succeed
38875929
DM
1429after the other thread has entered cond_wait() and thus relinquished the
1430lock.
1431
69282e91 1432=item connect() on closed socket %s
a0d0e21e 1433
be771a83
GS
1434(W closed) You tried to do a connect on a closed socket. Did you forget
1435to check the return value of your socket() call? See
1436L<perlfunc/connect>.
a0d0e21e 1437
41ab332f 1438=item Constant(%s)%s: %s
6df41af2 1439
be771a83
GS
1440(F) The parser found inconsistencies either while attempting to define
1441an overloaded constant, or when trying to find the character name
1442specified in the C<\N{...}> escape. Perhaps you forgot to load the
1443corresponding C<overload> or C<charnames> pragma? See L<charnames> and
1444L<overload>.
6df41af2 1445
fc8cd66c
YO
1446=item Constant(%s)%s: %s in regex; marked by <-- HERE in m/%s/
1447
1a147d38
YO
1448(F) The parser found inconsistencies while attempting to find
1449the character name specified in the C<\N{...}> escape. Perhaps you
1450forgot to load the corresponding C<charnames> pragma?
fc8cd66c
YO
1451See L<charnames>.
1452
779c5bc9
GS
1453=item Constant is not %s reference
1454
1455(F) A constant value (perhaps declared using the C<use constant> pragma)
be771a83
GS
1456is being dereferenced, but it amounts to the wrong type of reference.
1457The message indicates the type of reference that was expected. This
1458usually indicates a syntax error in dereferencing the constant value.
779c5bc9
GS
1459See L<perlsub/"Constant Functions"> and L<constant>.
1460
4cee8e80
CS
1461=item Constant subroutine %s redefined
1462
bb028877 1463(S) You redefined a subroutine which had previously been
be771a83
GS
1464eligible for inlining. See L<perlsub/"Constant Functions"> for
1465commentary and workarounds.
4cee8e80 1466
9607fc9c
PP
1467=item Constant subroutine %s undefined
1468
be771a83
GS
1469(W misc) You undefined a subroutine which had previously been eligible
1470for inlining. See L<perlsub/"Constant Functions"> for commentary and
1471workarounds.
9607fc9c 1472
e7ea3e70
IZ
1473=item Copy method did not return a reference
1474
64977eb6 1475(F) The method which overloads "=" is buggy. See
13a2d996 1476L<overload/Copy Constructor>.
e7ea3e70 1477
6798c92b
GS
1478=item CORE::%s is not a keyword
1479
1480(F) The CORE:: namespace is reserved for Perl keywords.
1481
a0d0e21e
LW
1482=item corrupted regexp pointers
1483
1484(P) The regular expression engine got confused by what the regular
1485expression compiler gave it.
1486
1487=item corrupted regexp program
1488
be771a83
GS
1489(P) The regular expression engine got passed a regexp program without a
1490valid magic number.
a0d0e21e 1491
de42a5a9 1492=item Corrupt malloc ptr 0x%x at 0x%x
6df41af2
GS
1493
1494(P) The malloc package that comes with Perl had an internal failure.
1495
49704364
LW
1496=item Count after length/code in unpack
1497
1498(F) You had an unpack template indicating a counted-length string, but
1499you have also specified an explicit size for the string. See
1500L<perlfunc/pack>.
1501
a0d0e21e
LW
1502=item Deep recursion on subroutine "%s"
1503
be771a83
GS
1504(W recursion) This subroutine has called itself (directly or indirectly)
1505100 times more than it has returned. This probably indicates an
1506infinite recursion, unless you're writing strange benchmark programs, in
1507which case it indicates something else.
a0d0e21e 1508
aad1d01f
NC
1509This threshold can be changed from 100, by recompiling the F<perl> binary,
1510setting the C pre-processor macro C<PERL_SUB_DEPTH_WARN> to the desired value.
1511
f10b0346 1512=item defined(@array) is deprecated
69794302 1513
be771a83
GS
1514(D deprecated) defined() is not usually useful on arrays because it
1515checks for an undefined I<scalar> value. If you want to see if the
64977eb6 1516array is empty, just use C<if (@array) { # not empty }> for example.
69794302 1517
f10b0346 1518=item defined(%hash) is deprecated
69794302 1519
be771a83
GS
1520(D deprecated) defined() is not usually useful on hashes because it
1521checks for an undefined I<scalar> value. If you want to see if the hash
64977eb6 1522is empty, just use C<if (%hash) { # not empty }> for example.
69794302 1523
bcb95744
FC
1524=item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in m/%s/
1525
1526(F) You used something like C<(?(DEFINE)...|..)> which is illegal. The
1527most likely cause of this error is that you left out a parenthesis inside
1528of the C<....> part.
1529
1530The <-- HERE shows in the regular expression about where the problem was
1531discovered.
1532
62658f4d
PM
1533=item %s defines neither package nor VERSION--version check failed
1534
1535(F) You said something like "use Module 42" but in the Module file
1536there are neither package declarations nor a C<$VERSION>.
1537
fc36a67e
PP
1538=item Delimiter for here document is too long
1539
be771a83
GS
1540(F) In a here document construct like C<<<FOO>, the label C<FOO> is too
1541long for Perl to handle. You have to be seriously twisted to write code
1542that triggers this error.
fc36a67e 1543
4a68bf9d 1544=item Deprecated character in \N{...}; marked by <-- HERE in \N{%s<-- HERE %s
cb233ae3
KW
1545
1546(D deprecated) Just about anything is legal for the C<...> in C<\N{...}>.
5fca8acb
FC
1547But starting in 5.12, non-reasonable ones that don't look like names
1548are deprecated. A reasonable name begins with an alphabetic character
1549and continues with any combination of alphanumerics, dashes, spaces,
1550parentheses or colons.
cb233ae3 1551
6d3b25aa
RGS
1552=item Deprecated use of my() in false conditional
1553
1554(D deprecated) You used a declaration similar to C<my $x if 0>.
1555There has been a long-standing bug in Perl that causes a lexical variable
1556not to be cleared at scope exit when its declaration includes a false
1557conditional. Some people have exploited this bug to achieve a kind of
1558static variable. Since we intend to fix this bug, we don't want people
1559relying on this behavior. You can achieve a similar static effect by
1560declaring the variable in a separate block outside the function, eg
36fb85f3 1561
6d3b25aa
RGS
1562 sub f { my $x if 0; return $x++ }
1563
1564becomes
1565
1566 { my $x; sub f { return $x++ } }
1567
36fb85f3
RGS
1568Beginning with perl 5.9.4, you can also use C<state> variables to
1569have lexicals that are initialized only once (see L<feature>):
1570
1571 sub f { state $x; return $x++ }
1572
500ab966
RGS
1573=item DESTROY created new reference to dead object '%s'
1574
1575(F) A DESTROY() method created a new reference to the object which is
1576just being DESTROYed. Perl is confused, and prefers to abort rather than
1577to create a dangling reference.
1578
3cdd684c
TP
1579=item Did not produce a valid header
1580
1581See Server error.
1582
6df41af2
GS
1583=item %s did not return a true value
1584
1585(F) A required (or used) file must return a true value to indicate that
1586it compiled correctly and ran its initialization code correctly. It's
1587traditional to end such a file with a "1;", though any true value would
1588do. See L<perlfunc/require>.
1589
cc507455 1590=item (Did you mean &%s instead?)
4633a7c4 1591
413ff9f6
FC
1592(W misc) You probably referred to an imported subroutine &FOO as $FOO or
1593some such.
4633a7c4 1594
cc507455 1595=item (Did you mean "local" instead of "our"?)
33633739 1596
be771a83
GS
1597(W misc) Remember that "our" does not localize the declared global
1598variable. You have declared it again in the same lexical scope, which
1599seems superfluous.
33633739 1600
cc507455 1601=item (Did you mean $ or @ instead of %?)
a0d0e21e 1602
be771a83
GS
1603(W) You probably said %hash{$key} when you meant $hash{$key} or
1604@hash{@keys}. On the other hand, maybe you just meant %hash and got
1605carried away.
748a9306 1606
7e1af8bc 1607=item Died
5f05dabc
PP
1608
1609(F) You passed die() an empty string (the equivalent of C<die "">) or
075b00aa 1610you called it with no args and C<$@> was empty.
5f05dabc 1611
3cdd684c
TP
1612=item Document contains no data
1613
1614See Server error.
1615
62658f4d
PM
1616=item %s does not define %s::VERSION--version check failed
1617
1618(F) You said something like "use Module 42" but the Module did not
1619define a C<$VERSION.>
1620
49704364
LW
1621=item '/' does not take a repeat count
1622
1623(F) You cannot put a repeat count of any kind right after the '/' code.
1624See L<perlfunc/pack>.
1625
a0d0e21e
LW
1626=item Don't know how to handle magic of type '%s'
1627
1628(P) The internal handling of magical variables has been cursed.
1629
1630=item do_study: out of memory
1631
1632(P) This should have been caught by safemalloc() instead.
1633
6df41af2
GS
1634=item (Do you need to predeclare %s?)
1635
56da5a46
RGS
1636(S syntax) This is an educated guess made in conjunction with the message
1637"%s found where operator expected". It often means a subroutine or module
6df41af2
GS
1638name is being referenced that hasn't been declared yet. This may be
1639because of ordering problems in your file, or because of a missing
be771a83
GS
1640"sub", "package", "require", or "use" statement. If you're referencing
1641something that isn't defined yet, you don't actually have to define the
1642subroutine or package before the current location. You can use an empty
1643"sub foo;" or "package FOO;" to enter a "forward" declaration.
6df41af2 1644
ac206dc8
RGS
1645=item dump() better written as CORE::dump()
1646
1647(W misc) You used the obsolescent C<dump()> built-in function, without fully
1648qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>.
1649
84d78eb7
YO
1650=item dump is not supported
1651
1652(F) Your machine doesn't support dump/undump.
1653
a0d0e21e
LW
1654=item Duplicate free() ignored
1655
be771a83
GS
1656(S malloc) An internal routine called free() on something that had
1657already been freed.
a0d0e21e 1658
1109a392
MHM
1659=item Duplicate modifier '%c' after '%c' in %s
1660
1661(W) You have applied the same modifier more than once after a type
1662in a pack template. See L<perlfunc/pack>.
1663
4633a7c4
LW
1664=item elseif should be elsif
1665
56da5a46
RGS
1666(S syntax) There is no keyword "elseif" in Perl because Larry thinks it's
1667ugly. Your code will be interpreted as an attempt to call a method named
be771a83 1668"elseif" for the class returned by the following block. This is
4633a7c4
LW
1669unlikely to be what you want.
1670
ab13f0c7
JH
1671=item Empty %s
1672
af6f566e
HS
1673(F) C<\p> and C<\P> are used to introduce a named Unicode property, as
1674described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in
1675a regular expression without specifying the property name.
ab13f0c7 1676
85ab1d1d 1677=item entering effective %s failed
5ff3f7a4 1678
85ab1d1d 1679(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1680effective uids or gids failed.
1681
c038024b
RGS
1682=item %ENV is aliased to %s
1683
1684(F) You're running under taint mode, and the C<%ENV> variable has been
1685aliased to another hash, so it doesn't reflect anymore the state of the
1686program's environment. This is potentially insecure.
1687
748a9306
LW
1688=item Error converting file specification %s
1689
5f05dabc 1690(F) An error peculiar to VMS. Because Perl may have to deal with file
748a9306 1691specifications in either VMS or Unix syntax, it converts them to a
be771a83
GS
1692single form when it must operate on them directly. Either you've passed
1693an invalid file specification to Perl, or you've found a case the
1694conversion routines don't handle. Drat.
748a9306 1695
e4d48cc9
GS
1696=item %s: Eval-group in insecure regular expression
1697
be771a83
GS
1698(F) Perl detected tainted data when trying to compile a regular
1699expression that contains the C<(?{ ... })> zero-width assertion, which
1700is unsafe. See L<perlre/(?{ code })>, and L<perlsec>.
e4d48cc9 1701
fc8f615e 1702=item %s: Eval-group not allowed at runtime, use re 'eval'
e4d48cc9 1703
be771a83
GS
1704(F) Perl tried to compile a regular expression containing the
1705C<(?{ ... })> zero-width assertion at run time, as it would when the
f11307f5
FC
1706pattern contains interpolated values. Since that is a security risk,
1707it is not allowed. If you insist, you may still do this by using the
1708C<re 'eval'> pragma or by explicitly building the pattern from an
1709interpolated string at run time and using that in an eval(). See
1710L<perlre/(?{ code })>.
e4d48cc9 1711
6df41af2
GS
1712=item %s: Eval-group not allowed, use re 'eval'
1713
be771a83
GS
1714(F) A regular expression contained the C<(?{ ... })> zero-width
1715assertion, but that construct is only allowed when the C<use re 'eval'>
1716pragma is in effect. See L<perlre/(?{ code })>.
6df41af2 1717
1a147d38
YO
1718=item EVAL without pos change exceeded limit in regex; marked by <-- HERE in m/%s/
1719
1720(F) You used a pattern that nested too many EVAL calls without consuming
1721any text. Restructure the pattern so that text is consumed.
1722
1723The <-- HERE shows in the regular expression about where the problem was
1724discovered.
1725
fc36a67e
PP
1726=item Excessively long <> operator
1727
1728(F) The contents of a <> operator may not exceed the maximum size of a
1729Perl identifier. If you're just trying to glob a long list of
1730filenames, try using the glob() operator, or put the filenames into a
1731variable and glob that.
1732
ed9aa3b7
SG
1733=item exec? I'm not *that* kind of operating system
1734
af8bb25a
FC
1735(F) The C<exec> function is not implemented on some systems, e.g., Symbian
1736OS. See L<perlport>.
ed9aa3b7 1737
fe13d51d 1738=item Execution of %s aborted due to compilation errors.
a0d0e21e
LW
1739
1740(F) The final summary message when a Perl compilation fails.
1741
1742=item Exiting eval via %s
1743
be771a83
GS
1744(W exiting) You are exiting an eval by unconventional means, such as a
1745goto, or a loop control statement.
e476b1b5
GS
1746
1747=item Exiting format via %s
1748
9a2ff54b 1749(W exiting) You are exiting a format by unconventional means, such as a
be771a83 1750goto, or a loop control statement.
a0d0e21e 1751
0a753a76
PP
1752=item Exiting pseudo-block via %s
1753
be771a83
GS
1754(W exiting) You are exiting a rather special block construct (like a
1755sort block or subroutine) by unconventional means, such as a goto, or a
1756loop control statement. See L<perlfunc/sort>.
0a753a76 1757
a0d0e21e
LW
1758=item Exiting subroutine via %s
1759
be771a83
GS
1760(W exiting) You are exiting a subroutine by unconventional means, such
1761as a goto, or a loop control statement.
a0d0e21e
LW
1762
1763=item Exiting substitution via %s
1764
be771a83
GS
1765(W exiting) You are exiting a substitution by unconventional means, such
1766as a return, a goto, or a loop control statement.
a0d0e21e 1767
7b8d334a
GS
1768=item Explicit blessing to '' (assuming package main)
1769
be771a83
GS
1770(W misc) You are blessing a reference to a zero length string. This has
1771the effect of blessing the reference into the package main. This is
1772usually not what you want. Consider providing a default target package,
1773e.g. bless($ref, $p || 'MyPackage');
7b8d334a 1774
6df41af2
GS
1775=item %s: Expression syntax
1776
be771a83
GS
1777(A) You've accidentally run your script through B<csh> instead of Perl.
1778Check the #! line, or manually feed your script into Perl yourself.
6df41af2
GS
1779
1780=item %s failed--call queue aborted
1781
3c10abe3
AG
1782(F) An untrapped exception was raised while executing a UNITCHECK,
1783CHECK, INIT, or END subroutine. Processing of the remainder of the
1784queue of such routines has been prematurely ended.
6df41af2 1785
7253e4e3 1786=item False [] range "%s" in regex; marked by <-- HERE in m/%s/
73b437c8 1787
be771a83 1788(W regexp) A character class range must start and end at a literal
7253e4e3
RK
1789character, not another character class like C<\d> or C<[:alpha:]>. The "-"
1790in your false range is interpreted as a literal "-". Consider quoting the
1791"-", "\-". The <-- HERE shows in the regular expression about where the
1792problem was discovered. See L<perlre>.
73b437c8 1793
1b1ee2ef 1794=item Fatal VMS error (status=%d) at %s, line %d
a0d0e21e 1795
be771a83
GS
1796(P) An error peculiar to VMS. Something untoward happened in a VMS
1797system service or RTL routine; Perl's exit status should provide more
1798details. The filename in "at %s" and the line number in "line %d" tell
1799you which section of the Perl source code is distressed.
a0d0e21e
LW
1800
1801=item fcntl is not implemented
1802
1803(F) Your machine apparently doesn't implement fcntl(). What is this, a
1804PDP-11 or something?
1805
22846ab4
AB
1806=item FETCHSIZE returned a negative value
1807
1808(F) A tied array claimed to have a negative number of elements, which
1809is not possible.
1810
f337b084
TH
1811=item Field too wide in 'u' format in pack
1812
1813(W pack) Each line in an uuencoded string start with a length indicator
1814which can't encode values above 63. So there is no point in asking for
1815a line length bigger than that. Perl will behave as if you specified
5c96f6f7 1816C<u63> as the format.
f337b084 1817
af8c498a 1818=item Filehandle %s opened only for input
a0d0e21e 1819
6c8d78fb
HS
1820(W io) You tried to write on a read-only filehandle. If you intended
1821it to be a read-write filehandle, you needed to open it with "+<" or
1822"+>" or "+>>" instead of with "<" or nothing. If you intended only to
1823write the file, use ">" or ">>". See L<perlfunc/open>.
a0d0e21e 1824
af8c498a 1825=item Filehandle %s opened only for output
a0d0e21e 1826
6c8d78fb
HS
1827(W io) You tried to read from a filehandle opened only for writing, If
1828you intended it to be a read/write filehandle, you needed to open it
89a1bda8
FC
1829with "+<" or "+>" or "+>>" instead of with ">". If you intended only to
1830read from the file, use "<". See L<perlfunc/open>. Another possibility
1831is that you attempted to open filedescriptor 0 (also known as STDIN) for
1832output (maybe you closed STDIN earlier?).
97828cef
RGS
1833
1834=item Filehandle %s reopened as %s only for input
1835
1836(W io) You opened for reading a filehandle that got the same filehandle id
d7f8936a 1837as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR
97828cef
RGS
1838previously.
1839
1840=item Filehandle STDIN reopened as %s only for output
1841
1842(W io) You opened for writing a filehandle that got the same filehandle id
d7f8936a 1843as STDIN. This occurred because you closed STDIN previously.
a0d0e21e
LW
1844
1845=item Final $ should be \$ or $name
1846
1847(F) You must now decide whether the final $ in a string was meant to be
be771a83
GS
1848a literal dollar sign, or was meant to introduce a variable name that
1849happens to be missing. So you have to put either the backslash or the
1850name.
a0d0e21e 1851
56e90b21
GS
1852=item flock() on closed filehandle %s
1853
be771a83 1854(W closed) The filehandle you're attempting to flock() got itself closed
c289d2f7 1855some time before now. Check your control flow. flock() operates on
be771a83
GS
1856filehandles. Are you attempting to call flock() on a dirhandle by the
1857same name?
56e90b21 1858
6df41af2
GS
1859=item Format not terminated
1860
1861(F) A format must be terminated by a line with a solitary dot. Perl got
1862to the end of your file without finding such a line.
1863
a0d0e21e
LW
1864=item Format %s redefined
1865
e476b1b5 1866(W redefine) You redefined a format. To suppress this warning, say
a0d0e21e
LW
1867
1868 {
271595cc 1869 no warnings 'redefine';
a0d0e21e
LW
1870 eval "format NAME =...";
1871 }
1872
a0d0e21e
LW
1873=item Found = in conditional, should be ==
1874
e476b1b5 1875(W syntax) You said
a0d0e21e
LW
1876
1877 if ($foo = 123)
1878
1879when you meant
1880
1881 if ($foo == 123)
1882
1883(or something like that).
1884
6df41af2
GS
1885=item %s found where operator expected
1886
56da5a46
RGS
1887(S syntax) The Perl lexer knows whether to expect a term or an operator.
1888If it sees what it knows to be a term when it was expecting to see an
be771a83
GS
1889operator, it gives you this warning. Usually it indicates that an
1890operator or delimiter was omitted, such as a semicolon.
6df41af2 1891
a0d0e21e
LW
1892=item gdbm store returned %d, errno %d, key "%s"
1893
1894(S) A warning from the GDBM_File extension that a store failed.
1895
1896=item gethostent not implemented
1897
1898(F) Your C library apparently doesn't implement gethostent(), probably
1899because if it did, it'd feel morally obligated to return every hostname
1900on the Internet.
1901
69282e91 1902=item get%sname() on closed socket %s
a0d0e21e 1903
be771a83
GS
1904(W closed) You tried to get a socket or peer socket name on a closed
1905socket. Did you forget to check the return value of your socket() call?
a0d0e21e 1906
748a9306
LW
1907=item getpwnam returned invalid UIC %#o for user "%s"
1908
1909(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
1910C<getpwnam> operator returned an invalid UIC.
1911
6df41af2
GS
1912=item getsockopt() on closed socket %s
1913
be771a83
GS
1914(W closed) You tried to get a socket option on a closed socket. Did you
1915forget to check the return value of your socket() call? See
6df41af2
GS
1916L<perlfunc/getsockopt>.
1917
1918=item Global symbol "%s" requires explicit package name
1919
a4edf47d 1920(F) You've said "use strict" or "use strict vars", which indicates
30c282f6 1921that all variables must either be lexically scoped (using "my" or "state"),
a4edf47d
GS
1922declared beforehand using "our", or explicitly qualified to say
1923which package the global variable is in (using "::").
6df41af2 1924
e476b1b5
GS
1925=item glob failed (%s)
1926
be771a83
GS
1927(W glob) Something went wrong with the external program(s) used for
1928C<glob> and C<< <*.c> >>. Usually, this means that you supplied a
1929C<glob> pattern that caused the external program to fail and exit with a
1930nonzero status. If the message indicates that the abnormal exit
1931resulted in a coredump, this may also mean that your csh (C shell) is
1932broken. If so, you should change all of the csh-related variables in
1933config.sh: If you have tcsh, make the variables refer to it as if it
1934were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all
1935empty (except that C<d_csh> should be C<'undef'>) so that Perl will
1936think csh is missing. In either case, after editing config.sh, run
75b44862 1937C<./Configure -S> and rebuild Perl.
e476b1b5 1938
a0d0e21e
LW
1939=item Glob not terminated
1940
1941(F) The lexer saw a left angle bracket in a place where it was expecting
be771a83
GS
1942a term, so it's looking for the corresponding right angle bracket, and
1943not finding it. Chances are you left some needed parentheses out
1944earlier in the line, and you really meant a "less than".
a0d0e21e 1945
bcd05b94 1946=item gmtime(%f) too large
8b56d6ff 1947
e9200be3 1948(W overflow) You called C<gmtime> with a number that was larger than
fc003d4b
MS
1949it can reliably handle and C<gmtime> probably returned the wrong
1950date. This warning is also triggered with nan (the special
1951not-a-number value).
1952
bcd05b94 1953=item gmtime(%f) too small
fc003d4b 1954
e9200be3 1955(W overflow) You called C<gmtime> with a number that was smaller than
fc003d4b
MS
1956it can reliably handle and C<gmtime> probably returned the wrong
1957date. This warning is also triggered with nan (the special
1958not-a-number value).
8b56d6ff 1959
6df41af2 1960=item Got an error from DosAllocMem
a0d0e21e 1961
6df41af2
GS
1962(P) An error peculiar to OS/2. Most probably you're using an obsolete
1963version of Perl, and this should not happen anyway.
a0d0e21e
LW
1964
1965=item goto must have label
1966
1967(F) Unlike with "next" or "last", you're not allowed to goto an
1968unspecified destination. See L<perlfunc/goto>.
1969
49704364 1970=item ()-group starts with a count
18529408 1971
bca4a986
FC
1972(F) A ()-group started with a count. A count is supposed to follow
1973something: a template character or a ()-group. See L<perlfunc/pack>.
18529408 1974
fe13d51d 1975=item %s had compilation errors.
6df41af2
GS
1976
1977(F) The final summary message when a C<perl -c> fails.
1978
a0d0e21e
LW
1979=item Had to create %s unexpectedly
1980
be771a83
GS
1981(S internal) A routine asked for a symbol from a symbol table that ought
1982to have existed already, but for some reason it didn't, and had to be
1983created on an emergency basis to prevent a core dump.
a0d0e21e
LW
1984
1985=item Hash %%s missing the % in argument %d of %s()
1986
be771a83
GS
1987(D deprecated) Really old Perl let you omit the % on hash names in some
1988spots. This is now heavily deprecated.
a0d0e21e 1989
6df41af2
GS
1990=item %s has too many errors
1991
1992(F) The parser has given up trying to parse the program after 10 errors.
1993Further error messages would likely be uninformative.
1994
e6897b1a
KW
1995=item Having no space between pattern and following word is deprecated
1996
1997(D syntax)
1998
bd0e971a 1999You had a word that isn't a regex modifier immediately following a
b6fa137b
FC
2000pattern without an intervening space. If you are trying to use the C</le>
2001flags on a substitution, use C</el> instead. Otherwise, add white space
2002between the pattern and following word to eliminate the warning. As an
2003example of the latter, the two constructs:
e6897b1a
KW
2004
2005 $a =~ m/$foo/sand $bar
2006 $a =~ m/$foo/s and $bar
2007
21356872
FC
2008both currently mean the same thing, but it is planned to disallow the first
2009form in Perl 5.16. And,
e6897b1a
KW
2010
2011 $a =~ m/$foo/and $bar
2012
2013will be disallowed too.
2014
252aa082
JH
2015=item Hexadecimal number > 0xffffffff non-portable
2016
e476b1b5 2017(W portable) The hexadecimal number you specified is larger than 2**32-1
9e24b6e2
JH
2018(4294967295) and therefore non-portable between systems. See
2019L<perlport> for more on portability concerns.
252aa082 2020
8903cb82
PP
2021=item Identifier too long
2022
2023(F) Perl limits identifiers (names for variables, functions, etc.) to
fc36a67e 2024about 250 characters for simple names, and somewhat more for compound
be771a83
GS
2025names (like C<$A::B>). You've exceeded Perl's limits. Future versions
2026of Perl are likely to eliminate these arbitrary limitations.
8903cb82 2027
c3c41406 2028=item Ignoring zero length \N{} in character class
fc8cd66c 2029
ff3f963a
KW
2030(W) Named Unicode character escapes (\N{...}) may return a
2031zero length sequence. When such an escape is used in a character class
1a147d38 2032its behaviour is not well defined. Check that the correct escape has
fc8cd66c
YO
2033been used, and the correct charname handler is in scope.
2034
6df41af2 2035=item Illegal binary digit %s
f675dbe5 2036
6df41af2 2037(F) You used a digit other than 0 or 1 in a binary number.
f675dbe5 2038
6df41af2 2039=item Illegal binary digit %s ignored
a0d0e21e 2040
be771a83
GS
2041(W digit) You may have tried to use a digit other than 0 or 1 in a
2042binary number. Interpretation of the binary number stopped before the
2043offending digit.
a0d0e21e 2044
78d0fecf 2045=item Illegal character \%o (carriage return)
4fdae800 2046
d5898338 2047(F) Perl normally treats carriage returns in the program text as it
be771a83
GS
2048would any other whitespace, which means you should never see this error
2049when Perl was built using standard options. For some reason, your
2050version of Perl appears to have been built without this support. Talk
2051to your Perl administrator.
4fdae800 2052
d37a9538
ST
2053=item Illegal character in prototype for %s : %s
2054
197afce1 2055(W illegalproto) An illegal character was found in a prototype declaration.
2e9cc7ef 2056Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
d37a9538 2057
904d85c5
RGS
2058=item Illegal declaration of anonymous subroutine
2059
2060(F) When using the C<sub> keyword to construct an anonymous subroutine,
2061you must always specify a block of code. See L<perlsub>.
2062
8e742a20
MHM
2063=item Illegal declaration of subroutine %s
2064
2065(F) A subroutine was not declared correctly. See L<perlsub>.
2066
a0d0e21e
LW
2067=item Illegal division by zero
2068
be771a83
GS
2069(F) You tried to divide a number by 0. Either something was wrong in
2070your logic, or you need to put a conditional in to guard against
2071meaningless input.
a0d0e21e 2072
6df41af2
GS
2073=item Illegal hexadecimal digit %s ignored
2074
be771a83
GS
2075(W digit) You may have tried to use a character other than 0 - 9 or
2076A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal
2077number stopped before the illegal character.
6df41af2 2078
a0d0e21e
LW
2079=item Illegal modulus zero
2080
be771a83
GS
2081(F) You tried to divide a number by 0 to get the remainder. Most
2082numbers don't take to this kindly.
a0d0e21e 2083
6df41af2 2084=item Illegal number of bits in vec
399388f4 2085
6df41af2
GS
2086(F) The number of bits in vec() (the third argument) must be a power of
2087two from 1 to 32 (or 64, if your platform supports that).
399388f4
GS
2088
2089=item Illegal octal digit %s
a0d0e21e 2090
d1be9408 2091(F) You used an 8 or 9 in an octal number.
a0d0e21e 2092
399388f4 2093=item Illegal octal digit %s ignored
748a9306 2094
d1be9408 2095(W digit) You may have tried to use an 8 or 9 in an octal number.
75b44862 2096Interpretation of the octal number stopped before the 8 or 9.
748a9306 2097
fe13d51d 2098=item Illegal switch in PERL5OPT: -%c
6ff81951 2099
6df41af2 2100(X) The PERL5OPT environment variable may only be used to set the
646ca9b2 2101following switches: B<-[CDIMUdmtw]>.
6ff81951 2102
6df41af2 2103=item Ill-formed CRTL environ value "%s"
81e118e0 2104
75b44862 2105(W internal) A warning peculiar to VMS. Perl tried to read the CRTL's
be771a83
GS
2106internal environ array, and encountered an element without the C<=>
2107delimiter used to separate keys from values. The element is ignored.
09bef843 2108
6df41af2 2109=item Ill-formed message in prime_env_iter: |%s|
54310121 2110
be771a83
GS
2111(W internal) A warning peculiar to VMS. Perl tried to read a logical
2112name or CLI symbol definition when preparing to iterate over %ENV, and
2113didn't see the expected delimiter between key and value, so the line was
2114ignored.
54310121 2115
6df41af2 2116=item (in cleanup) %s
9607fc9c 2117
be771a83
GS
2118(W misc) This prefix usually indicates that a DESTROY() method raised
2119the indicated exception. Since destructors are usually called by the
2120system at arbitrary points during execution, and often a vast number of
2121times, the warning is issued only once for any number of failures that
2122would otherwise result in the same message being repeated.
6df41af2 2123
be771a83
GS
2124Failure of user callbacks dispatched using the C<G_KEEPERR> flag could
2125also result in this warning. See L<perlcall/G_KEEPERR>.
9607fc9c 2126
2c7d6b9c
RGS
2127=item Inconsistent hierarchy during C3 merge of class '%s': merging failed on parent '%s'
2128
2129(F) The method resolution order (MRO) of the given class is not
2130C3-consistent, and you have enabled the C3 MRO for this class. See the C3
2131documentation in L<mro> for more information.
2132
979699d9
JH
2133=item In EBCDIC the v-string components cannot exceed 2147483647
2134
2135(F) An error peculiar to EBCDIC. Internally, v-strings are stored as
2136Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC
2137encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF).
2138
1a147d38
YO
2139=item Infinite recursion in regex; marked by <-- HERE in m/%s/
2140
2141(F) You used a pattern that references itself without consuming any input
2142text. You should check the pattern to ensure that recursive patterns
2143either consume text or fail.
2144
2145The <-- HERE shows in the regular expression about where the problem was
2146discovered.
2147
6dbe9451
NC
2148=item Initialization of state variables in list context currently forbidden
2149
2150(F) Currently the implementation of "state" only permits the initialization
2151of scalar variables in scalar context. Re-write C<state ($a) = 42> as
2152C<state $a = 42> to change from list to scalar context. Constructions such
2153as C<state (@a) = foo()> will be supported in a future perl release.
2154
a0d0e21e
LW
2155=item Insecure dependency in %s
2156
8b1a09fc 2157(F) You tried to do something that the tainting mechanism didn't like.
be771a83
GS
2158The tainting mechanism is turned on when you're running setuid or
2159setgid, or when you specify B<-T> to turn it on explicitly. The
2160tainting mechanism labels all data that's derived directly or indirectly
2161from the user, who is considered to be unworthy of your trust. If any
2162such data is used in a "dangerous" operation, you get this error. See
2163L<perlsec> for more information.
a0d0e21e
LW
2164
2165=item Insecure directory in %s
2166
be771a83
GS
2167(F) You can't use system(), exec(), or a piped open in a setuid or
2168setgid script if C<$ENV{PATH}> contains a directory that is writable by
df98f984
RGS
2169the world. Also, the PATH must not contain any relative directory.
2170See L<perlsec>.
a0d0e21e 2171
62f468fc 2172=item Insecure $ENV{%s} while running %s
a0d0e21e
LW
2173
2174(F) You can't use system(), exec(), or a piped open in a setuid or
62f468fc 2175setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
332d5f78
SR
2176C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data
2177supplied (or potentially supplied) by the user. The script must set
2178the path to a known value, using trustworthy data. See L<perlsec>.
a0d0e21e 2179
0e9be77f
DM
2180=item Insecure user-defined property %s
2181
2182(F) Perl detected tainted data when trying to compile a regular
2183expression that contains a call to a user-defined character property
2184function, i.e. C<\p{IsFoo}> or C<\p{InFoo}>.
2185See L<perlunicode/User-Defined Character Properties> and L<perlsec>.
2186
b9ef414d
FC
2187=item Integer overflow in format string for %s
2188
2189(F) The indexes and widths specified in the format string of C<printf()>
2190or C<sprintf()> are too large. The numbers must not overflow the size of
2191integers for your architecture.
2192
a7ae9550
GS
2193=item Integer overflow in %s number
2194
75b44862 2195(W overflow) The hexadecimal, octal or binary number you have specified
be771a83
GS
2196either as a literal or as an argument to hex() or oct() is too big for
2197your architecture, and has been converted to a floating point number.
2198On a 32-bit architecture the largest hexadecimal, octal or binary number
9e24b6e2
JH
2199representable without overflow is 0xFFFFFFFF, 037777777777, or
22000b11111111111111111111111111111111 respectively. Note that Perl
2201transparently promotes all numbers to a floating point representation
2202internally--subject to loss of precision errors in subsequent
2203operations.
bbce6d69 2204
46314c13
JP
2205=item Integer overflow in version
2206
2207(F) Some portion of a version initialization is too large for the
2208size of integers for your architecture. This is not a warning
2209because there is no rational reason for a version to try and use a
2210element larger than typically 2**32. This is usually caused by
2211trying to use some odd mathematical operation as a version, like
2212100/9.
2213
7253e4e3 2214=item Internal disaster in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2215
2216(P) Something went badly wrong in the regular expression parser.
7253e4e3 2217The <-- HERE shows in the regular expression about where the problem was
b45f050a
JF
2218discovered.
2219
748a9306
LW
2220=item Internal inconsistency in tracking vforks
2221
be771a83
GS
2222(S) A warning peculiar to VMS. Perl keeps track of the number of times
2223you've called C<fork> and C<exec>, to determine whether the current call
2224to C<exec> should affect the current script or a subprocess (see
2225L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so
2226Perl is making a guess and treating this C<exec> as a request to
2227terminate the Perl script and execute the specified command.
748a9306 2228
7253e4e3 2229=item Internal urp in regex; marked by <-- HERE in m/%s/
b45f050a 2230
7253e4e3
RK
2231(P) Something went badly awry in the regular expression parser. The
2232<-- HERE shows in the regular expression about where the problem was
2233discovered.
a0d0e21e 2234
6df41af2
GS
2235=item %s (...) interpreted as function
2236
75b44862 2237(W syntax) You've run afoul of the rule that says that any list operator
be771a83 2238followed by parentheses turns into a function, with all the list
64977eb6 2239operators arguments found inside the parentheses. See
13a2d996 2240L<perlop/Terms and List Operators (Leftward)>.
6df41af2 2241
09bef843
SB
2242=item Invalid %s attribute: %s
2243
a4a4c9e2 2244(F) The indicated attribute for a subroutine or variable was not recognized
09bef843
SB
2245by Perl or by a user-supplied handler. See L<attributes>.
2246
2247=item Invalid %s attributes: %s
2248
a4a4c9e2 2249(F) The indicated attributes for a subroutine or variable were not
be771a83 2250recognized by Perl or by a user-supplied handler. See L<attributes>.
09bef843 2251
c635e13b
PP
2252=item Invalid conversion in %s: "%s"
2253
be771a83
GS
2254(W printf) Perl does not understand the given format conversion. See
2255L<perlfunc/sprintf>.
c635e13b 2256
9e08bc66
ST
2257=item Invalid escape in the specified encoding in regex; marked by <-- HERE in m/%s/
2258
2259(W regexp) The numeric escape (for example C<\xHH>) of value < 256
2260didn't correspond to a single character through the conversion
2261from the encoding specified by the encoding pragma.
2262The escape was replaced with REPLACEMENT CHARACTER (U+FFFD) instead.
2263The <-- HERE shows in the regular expression about where the
2264escape was discovered.
2265
8149aa9f
FC
2266=item Invalid hexadecimal number in \N{U+...}
2267
2268(F) The character constant represented by C<...> is not a valid hexadecimal
74f8e9e3
FC
2269number. Either it is empty, or you tried to use a character other than
22700 - 9 or A - F, a - f in a hexadecimal number.
8149aa9f 2271
2c7d6b9c
RGS
2272=item Invalid mro name: '%s'
2273
162a3e34
FC
2274(F) You tried to C<mro::set_mro("classname", "foo")> or C<use mro 'foo'>,
2275where C<foo> is not a valid method resolution order (MRO). Currently,
2276the only valid ones supported are C<dfs> and C<c3>, unless you have loaded
2277a module that is a MRO plugin. See L<mro> and L<perlmroapi>.
2c7d6b9c 2278
7253e4e3 2279=item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2280
2281(F) The range specified in a character class had a minimum character
7253e4e3
RK
2282greater than the maximum character. One possibility is that you forgot the
2283C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only
2284up to C<ff>. The <-- HERE shows in the regular expression about where the
2285problem was discovered. See L<perlre>.
6df41af2 2286
d1573ac7 2287=item Invalid range "%s" in transliteration operator
c2e66d9e
GS
2288
2289(F) The range specified in the tr/// or y/// operator had a minimum
2290character greater than the maximum character. See L<perlop>.
2291
09bef843
SB
2292=item Invalid separator character %s in attribute list
2293
0120eecf 2294(F) Something other than a colon or whitespace was seen between the
be771a83
GS
2295elements of an attribute list. If the previous attribute had a
2296parenthesised parameter list, perhaps that list was terminated too soon.
2297See L<attributes>.
09bef843 2298
b4581f09
JH
2299=item Invalid separator character %s in PerlIO layer specification %s
2300
2bfc5f71
FC
2301(W layer) When pushing layers onto the Perl I/O system, something other
2302than a colon or whitespace was seen between the elements of a layer list.
b4581f09
JH
2303If the previous attribute had a parenthesised parameter list, perhaps that
2304list was terminated too soon.
2305
2c86d456
DG
2306=item Invalid strict version format (%s)
2307
2308(F) A version number did not meet the "strict" criteria for versions.
2309A "strict" version number is a positive decimal number (integer or
2310decimal-fraction) without exponentiation or else a dotted-decimal
2311v-string with a leading 'v' character and at least three components.
a6485a24 2312The parenthesized text indicates which criteria were not met.
2c86d456
DG
2313See the L<version> module for more details on allowed version formats.
2314
49704364 2315=item Invalid type '%s' in %s
96e4d5b1 2316
49704364
LW
2317(F) The given character is not a valid pack or unpack type.
2318See L<perlfunc/pack>.
2319(W) The given character is not a valid pack or unpack type but used to be
75b44862 2320silently ignored.
96e4d5b1 2321
2c86d456
DG
2322=item Invalid version format (%s)
2323
2324(F) A version number did not meet the "lax" criteria for versions.
2325A "lax" version number is a positive decimal number (integer or
2326decimal-fraction) without exponentiation or else a dotted-decimal
9da2b86b
FC
2327v-string. If the v-string has fewer than three components, it must
2328have a leading 'v' character. Otherwise, the leading 'v' is optional.
2329Both decimal and dotted-decimal versions may have a trailing "alpha"
2c86d456
DG
2330component separated by an underscore character after a fractional or
2331dotted-decimal component. The parenthesized text indicates which
a6485a24 2332criteria were not met. See the L<version> module for more details on
2c86d456 2333allowed version formats.
46314c13 2334
798ae1b7
DG
2335=item Invalid version object
2336
2337(F) The internal structure of the version object was invalid. Perhaps
2338the internals were modified directly in some way or an arbitrary reference
2339was blessed into the "version" class.
2340
a0d0e21e
LW
2341=item ioctl is not implemented
2342
2343(F) Your machine apparently doesn't implement ioctl(), which is pretty
2344strange for a machine that supports C.
2345
c289d2f7
JH
2346=item ioctl() on unopened %s
2347
2348(W unopened) You tried ioctl() on a filehandle that was never opened.
34b6fd5e 2349Check your control flow and number of arguments.
c289d2f7 2350
fe13d51d 2351=item IO layers (like '%s') unavailable
363c40c4
SB
2352
2353(F) Your Perl has not been configured to have PerlIO, and therefore
34b6fd5e 2354you cannot use IO layers. To have PerlIO, Perl must be configured
363c40c4
SB
2355with 'useperlio'.
2356
80cbd5ad
JH
2357=item IO::Socket::atmark not implemented on this architecture
2358
2359(F) Your machine doesn't implement the sockatmark() functionality,
34b6fd5e 2360neither as a system call nor an ioctl call (SIOCATMARK).
80cbd5ad 2361
b4581f09
JH
2362=item $* is no longer supported
2363
a58ac25e
FC
2364(D deprecated, syntax) The special variable C<$*>, deprecated in older
2365perls, has been removed as of 5.9.0 and is no longer supported. In
2366previous versions of perl the use of C<$*> enabled or disabled multi-line
2367matching within a string.
4fd19576
B
2368
2369Instead of using C<$*> you should use the C</m> (and maybe C</s>) regexp
570dedd4
FC
2370modifiers. You can enable C</m> for a lexical scope (even a whole file)
2371with C<use re '/m'>. (In older versions: when C<$*> was set to a true value
2372then all regular expressions behaved as if they were written using C</m>.)
b4581f09 2373
8ae1fe26
RGS
2374=item $# is no longer supported
2375
a58ac25e
FC
2376(D deprecated, syntax) The special variable C<$#>, deprecated in older
2377perls, has been removed as of 5.9.3 and is no longer supported. You
2378should use the printf/sprintf functions instead.
8ae1fe26 2379
6ad11d81
JH
2380=item `%s' is not a code reference
2381
04a80ee0
RGS
2382(W overload) The second (fourth, sixth, ...) argument of overload::constant
2383needs to be a code reference. Either an anonymous subroutine, or a reference
6ad11d81
JH
2384to a subroutine.
2385
2386=item `%s' is not an overloadable type
2387
04a80ee0
RGS
2388(W overload) You tried to overload a constant type the overload package is
2389unaware of.
6ad11d81 2390
a0d0e21e
LW
2391=item junk on end of regexp
2392
2393(P) The regular expression parser is confused.
2394
2395=item Label not found for "last %s"
2396
be771a83
GS
2397(F) You named a loop to break out of, but you're not currently in a loop
2398of that name, not even if you count where you were called from. See
2399L<perlfunc/last>.
a0d0e21e
LW
2400
2401=item Label not found for "next %s"
2402
2403(F) You named a loop to continue, but you're not currently in a loop of
2404that name, not even if you count where you were called from. See
2405L<perlfunc/last>.
2406
2407=item Label not found for "redo %s"
2408
2409(F) You named a loop to restart, but you're not currently in a loop of
2410that name, not even if you count where you were called from. See
2411L<perlfunc/last>.
2412
85ab1d1d 2413=item leaving effective %s failed
5ff3f7a4 2414
85ab1d1d 2415(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
2416effective uids or gids failed.
2417
49704364
LW
2418=item length/code after end of string in unpack
2419
d7f8936a 2420(F) While unpacking, the string buffer was already used up when an unpack
49704364
LW
2421length/code combination tried to obtain more data. This results in
2422an undefined value for the length. See L<perlfunc/pack>.
2423
f0e67a1d
Z
2424=item Lexing code attempted to stuff non-Latin-1 character into Latin-1 input
2425
2426(F) An extension is attempting to insert text into the current parse
96090e4f 2427(using L<lex_stuff_pvn|perlapi/lex_stuff_pvn> or similar), but tried to insert a character
d35a2c71
FC
2428that couldn't be part of the current input. This is an inherent pitfall
2429of the stuffing mechanism, and one of the reasons to avoid it. Where it
2430is necessary to stuff, stuffing only plain ASCII is recommended.
f0e67a1d
Z
2431
2432=item Lexing code internal error (%s)
2433
2434(F) Lexing code supplied by an extension violated the lexer's API in a
2435detectable way.
2436
69282e91 2437=item listen() on closed socket %s
a0d0e21e 2438
be771a83
GS
2439(W closed) You tried to do a listen on a closed socket. Did you forget
2440to check the return value of your socket() call? See
2441L<perlfunc/listen>.
a0d0e21e 2442
bcd05b94 2443=item localtime(%f) too large
8b56d6ff 2444
e9200be3 2445(W overflow) You called C<localtime> with a number that was larger
fc003d4b
MS
2446than it can reliably handle and C<localtime> probably returned the
2447wrong date. This warning is also triggered with nan (the special
2448not-a-number value).
2449
bcd05b94 2450=item localtime(%f) too small
fc003d4b 2451
e9200be3 2452(W overflow) You called C<localtime> with a number that was smaller
fc003d4b
MS
2453than it can reliably handle and C<localtime> probably returned the
2454wrong date. This warning is also triggered with nan (the special
2455not-a-number value).
8b56d6ff 2456
58e23c8d 2457=item Lookbehind longer than %d not implemented in regex m/%s/
b45f050a
JF
2458
2459(F) There is currently a limit on the length of string which lookbehind can
58e23c8d 2460handle. This restriction may be eased in a future release.
2e50fd82 2461
b88df990
NC
2462=item Lost precision when %s %f by 1
2463
2464(W) The value you attempted to increment or decrement by one is too large
2465for the underlying floating point representation to store accurately,
2466hence the target of C<++> or C<--> is unchanged. Perl issues this warning
2467because it has already switched from integers to floating point when values
2468are too large for integers, and now even floating point is insufficient.
2469You may wish to switch to using L<Math::BigInt> explicitly.
2470
2f7da168
RK
2471=item lstat() on filehandle %s
2472
2473(W io) You tried to do an lstat on a filehandle. What did you mean
2474by that? lstat() makes sense only on filenames. (Perl did a fstat()
2475instead on the filehandle.)
2476
885ef6f5
GG
2477=item lvalue attribute ignored after the subroutine has been defined
2478
963d9ce9 2479(W misc) Making a subroutine an lvalue subroutine after it has been defined
d9159685
RS
2480by declaring the subroutine with an lvalue attribute is not
2481possible. To make the subroutine an lvalue subroutine add the
e2bd2e2b 2482lvalue attribute to the definition, or put the declaration before
885ef6f5
GG
2483the definition.
2484
2db62bbc 2485=item Malformed integer in [] in pack
49704364 2486
2db62bbc 2487(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2488are permitted. See L<perlfunc/pack>.
2489
2490=item Malformed integer in [] in unpack
2491
2db62bbc 2492(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2493are permitted. See L<perlfunc/pack>.
2494
6df41af2
GS
2495=item Malformed PERLLIB_PREFIX
2496
2497(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
2498
2499 prefix1;prefix2
2500
2501or
6df41af2
GS
2502 prefix1 prefix2
2503
be771a83
GS
2504with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of
2505a builtin library search path, prefix2 is substituted. The error may
2506appear if components are not found, or are too long. See
fecfaeb8 2507"PERLLIB_PREFIX" in L<perlos2>.
6df41af2 2508
2f758a16
ST
2509=item Malformed prototype for %s: %s
2510
d37a9538
ST
2511(F) You tried to use a function with a malformed prototype. The
2512syntax of function prototypes is given a brief compile-time check for
2513obvious errors like invalid characters. A more rigorous check is run
2514when the function is called.
2f758a16 2515
ba210ebe
JH
2516=item Malformed UTF-8 character (%s)
2517
2575c402
JW
2518(S utf8) (F) Perl detected a string that didn't comply with UTF-8
2519encoding rules, even though it had the UTF8 flag on.
ba210ebe 2520
2575c402
JW
2521One possible cause is that you set the UTF8 flag yourself for data that
2522you thought to be in UTF-8 but it wasn't (it was for example legacy
25238-bit data). To guard against this, you can use Encode::decode_utf8.
2524
2525If you use the C<:encoding(UTF-8)> PerlIO layer for input, invalid byte
2526sequences are handled gracefully, but if you use C<:utf8>, the flag is
2527set without validating the data, possibly resulting in this error
2528message.
2529
2530See also L<Encode/"Handling Malformed Data">.
901b21bf 2531
ff3f963a
KW
2532=item Malformed UTF-8 returned by \N
2533
2534(F) The charnames handler returned malformed UTF-8.
2535
4a5d3a93
FC
2536=item Malformed UTF-8 string in '%c' format in unpack
2537
2538(F) You tried to unpack something that didn't comply with UTF-8 encoding
2539rules and perl was unable to guess how to make more progress.
2540
f337b084
TH
2541=item Malformed UTF-8 string in pack
2542
2543(F) You tried to pack something that didn't comply with UTF-8 encoding
2544rules and perl was unable to guess how to make more progress.
2545
2546=item Malformed UTF-8 string in unpack
2547
2548(F) You tried to unpack something that didn't comply with UTF-8 encoding
2549rules and perl was unable to guess how to make more progress.
2550
4a5d3a93 2551=item Malformed UTF-16 surrogate
f337b084 2552
4a5d3a93
FC
2553(F) Perl thought it was reading UTF-16 encoded character data but while
2554doing it Perl met a malformed Unicode surrogate.
2555
2556=item %s matches null string many times in regex; marked by <-- HERE in m/%s/
2557
2558(W regexp) The pattern you've specified would be an infinite loop if the
2559regular expression engine didn't specifically check for that. The <-- HERE
2560shows in the regular expression about where the problem was discovered.
2561See L<perlre>.
f337b084 2562
de42a5a9 2563=item Maximal count of pending signals (%u) exceeded
2563cec5 2564
2db62bbc 2565(F) Perl aborted due to too high a number of signals pending. This
2563cec5
IZ
2566usually indicates that your operating system tried to deliver signals
2567too fast (with a very high priority), starving the perl process from
2568resources it would need to reach a point where it can process signals
2569safely. (See L<perlipc/"Deferred Signals (Safe Signals)">.)
2570
25f58aea
PN
2571=item "%s" may clash with future reserved word
2572
2573(W) This warning may be due to running a perl5 script through a perl4
2574interpreter, especially if the word that is being warned about is
2575"use" or "my".
2576
49704364 2577=item % may not be used in pack
6df41af2
GS
2578
2579(F) You can't pack a string by supplying a checksum, because the
be771a83
GS
2580checksumming process loses information, and you can't go the other way.
2581See L<perlfunc/unpack>.
6df41af2 2582
a0d0e21e
LW
2583=item Method for operation %s not found in package %s during blessing
2584
2585(F) An attempt was made to specify an entry in an overloading table that
e7ea3e70 2586doesn't resolve to a valid subroutine. See L<overload>.
a0d0e21e 2587
3cdd684c
TP
2588=item Method %s not permitted
2589
2590See Server error.
2591
a0d0e21e
LW
2592=item Might be a runaway multi-line %s string starting on line %d
2593
2594(S) An advisory indicating that the previous error may have been caused
2595by a missing delimiter on a string or pattern, because it eventually
2596ended earlier on the current line.
2597
2598=item Misplaced _ in number
2599
d4ced10d
JH
2600(W syntax) An underscore (underbar) in a numeric constant did not
2601separate two digits.
a0d0e21e 2602
7baa4690
HS
2603=item Missing argument in %s
2604
2605(W uninitialized) A printf-type format required more arguments than were
2606supplied.
2607
9e81e6a1
RGS
2608=item Missing argument to -%c
2609
2610(F) The argument to the indicated command line switch must follow
2611immediately after the switch, without intervening spaces.
2612
ff3f963a 2613=item Missing braces on \N{}
423cee85 2614
4a2d328f 2615(F) Wrong syntax of character name literal C<\N{charname}> within
532cb70d
FC
2616double-quotish context. This can also happen when there is a space
2617(or comment) between the C<\N> and the C<{> in a regex with the C</x> modifier.
2618This modifier does not change the requirement that the brace immediately
2619follow the C<\N>.
423cee85 2620
f0a2b745
KW
2621=item Missing braces on \o{}
2622
2623(F) A C<\o> must be followed immediately by a C<{> in double-quotish context.
2624
a0d0e21e
LW
2625=item Missing comma after first argument to %s function
2626
2627(F) While certain functions allow you to specify a filehandle or an
2628"indirect object" before the argument list, this ain't one of them.
2629
06eaf0bc
GS
2630=item Missing command in piped open
2631
be771a83
GS
2632(W pipe) You used the C<open(FH, "| command")> or
2633C<open(FH, "command |")> construction, but the command was missing or
2634blank.
06eaf0bc 2635
961ce445
RGS
2636=item Missing control char name in \c
2637
2638(F) A double-quoted string ended with "\c", without the required control
2639character name.
2640
6df41af2
GS
2641=item Missing name in "my sub"
2642
be771a83
GS
2643(F) The reserved syntax for lexically scoped subroutines requires that
2644they have a name with which they can be found.
6df41af2
GS
2645
2646=item Missing $ on loop variable
2647
be771a83
GS
2648(F) Apparently you've been programming in B<csh> too much. Variables
2649are always mentioned with the $ in Perl, unlike in the shells, where it
2650can vary from one line to the next.
6df41af2 2651
cc507455 2652=item (Missing operator before %s?)
748a9306 2653
56da5a46
RGS
2654(S syntax) This is an educated guess made in conjunction with the message
2655"%s found where operator expected". Often the missing operator is a comma.
748a9306 2656
ab13f0c7
JH
2657=item Missing right brace on %s
2658
ff3f963a
KW
2659(F) Missing right brace in C<\x{...}>, C<\p{...}>, C<\P{...}>, or C<\N{...}>.
2660
4a68bf9d 2661=item Missing right brace on \N{} or unescaped left brace after \N
ff3f963a 2662
d32207c9
FC
2663(F) C<\N> has two meanings.
2664
2665The traditional one has it followed by a name enclosed in braces,
2666meaning the character (or sequence of characters) given by that
2667name. Thus C<\N{ASTERISK}> is another way of writing C<*>, valid in both
2668double-quoted strings and regular expression patterns. In patterns,
2669it doesn't have the meaning an unescaped C<*> does.
2670
2671Starting in Perl 5.12.0, C<\N> also can have an additional meaning (only)
2672in patterns, namely to match a non-newline character. (This is short
2673for C<[^\n]>, and like C<.> but is not affected by the C</s> regex modifier.)
2674
2675This can lead to some ambiguities. When C<\N> is not followed immediately
2676by a left brace, Perl assumes the C<[^\n]> meaning. Also, if the braces
2677form a valid quantifier such as C<\N{3}> or C<\N{5,}>, Perl assumes that this
2678means to match the given quantity of non-newlines (in these examples,
26793; and 5 or more, respectively). In all other case, where there is a
2680C<\N{> and a matching C<}>, Perl assumes that a character name is desired.
2681
2682However, if there is no matching C<}>, Perl doesn't know if it was
2683mistakenly omitted, or if C<[^\n]{> was desired, and raises this error.
2684If you meant the former, add the right brace; if you meant the latter,
2685escape the brace with a backslash, like so: C<\N\{>
ab13f0c7 2686
d98d5fff 2687=item Missing right curly or square bracket
a0d0e21e 2688
be771a83
GS
2689(F) The lexer counted more opening curly or square brackets than closing
2690ones. As a general rule, you'll find it's missing near the place you
2691were last editing.
a0d0e21e 2692
6df41af2
GS
2693=item (Missing semicolon on previous line?)
2694
56da5a46
RGS
2695(S syntax) This is an educated guess made in conjunction with the message
2696"%s found where operator expected". Don't automatically put a semicolon on
6df41af2
GS
2697the previous line just because you saw this message.
2698
a0d0e21e
LW
2699=item Modification of a read-only value attempted
2700
2701(F) You tried, directly or indirectly, to change the value of a
5f05dabc 2702constant. You didn't, of course, try "2 = 1", because the compiler
a0d0e21e
LW
2703catches that. But an easy way to do the same thing is:
2704
2705 sub mod { $_[0] = 1 }
2706 mod(2);
2707
2708Another way is to assign to a substr() that's off the end of the string.
2709
c5674021
PDF
2710Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR>
2711is aliased to a constant in the look I<LIST>:
2712
2713 $x = 1;
2714 foreach my $n ($x, 2) {
2715 $n *= 2; # modifies the $x, but fails on attempt to modify the 2
64977eb6 2716 }
c5674021 2717
7a4340ed 2718=item Modification of non-creatable array value attempted, %s
a0d0e21e
LW
2719
2720(F) You tried to make an array value spring into existence, and the
2721subscript was probably negative, even counting from end of the array
2722backwards.
2723
7a4340ed 2724=item Modification of non-creatable hash value attempted, %s
a0d0e21e 2725
be771a83
GS
2726(P) You tried to make a hash value spring into existence, and it
2727couldn't be created for some peculiar reason.
a0d0e21e
LW
2728
2729=item Module name must be constant
2730
2731(F) Only a bare module name is allowed as the first argument to a "use".
2732
be98fb35 2733=item Module name required with -%c option
6df41af2 2734
be98fb35
GS
2735(F) The C<-M> or C<-m> options say that Perl should load some module, but
2736you omitted the name of the module. Consult L<perlrun> for full details
2737about C<-M> and C<-m>.
6df41af2 2738
fe13d51d 2739=item More than one argument to '%s' open
ed9aa3b7
SG
2740
2741(F) The C<open> function has been asked to open multiple files. This
2742can happen if you are trying to open a pipe to a command that takes a
2743list of arguments, but have forgotten to specify a piped open mode.
2744See L<perlfunc/open> for details.
2745
a0d0e21e
LW
2746=item msg%s not implemented
2747
2748(F) You don't have System V message IPC on your system.
2749
2750=item Multidimensional syntax %s not supported
2751
75b44862
GS
2752(W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>.
2753They're written like C<$foo[1][2][3]>, as in C.
8b1a09fc 2754
49704364 2755=item '/' must follow a numeric type in unpack
6df41af2 2756
49704364
LW
2757(F) You had an unpack template that contained a '/', but this did not
2758follow some unpack specification producing a numeric value.
2759See L<perlfunc/pack>.
6df41af2
GS
2760
2761=item "my sub" not yet implemented
2762
be771a83
GS
2763(F) Lexically scoped subroutines are not yet implemented. Don't try
2764that yet.
6df41af2 2765
fd1b7234 2766=item "my" variable %s can't be in a package
6df41af2 2767
be771a83
GS
2768(F) Lexically scoped variables aren't in a package, so it doesn't make
2769sense to try to declare one with a package qualifier on the front. Use
2770local() if you want to localize a package variable.
09bef843 2771
8149aa9f
FC
2772=item Name "%s::%s" used only once: possible typo
2773
2774(W once) Typographical errors often show up as unique variable names.
2775If you had a good reason for having a unique name, then just mention it
2776again somehow to suppress the message. The C<our> declaration is
2777provided for this purpose.
2778
2779NOTE: This warning detects symbols that have been used only once so $c, @c,
2780%c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered
2781the same; if a program uses $c only once but also uses any of the others it
2782will not trigger this warning.
2783
4a68bf9d 2784=item \N in a character class must be a named character: \N{...}
ff3f963a 2785
c3c41406 2786(F) The new (5.12) meaning of C<\N> as C<[^\n]> is not valid in a bracketed
f4e361c7
FC
2787character class, for the same reason that C<.> in a character class loses
2788its specialness: it matches almost everything, which is probably not
2789what you want.
c3c41406 2790
4a68bf9d 2791=item \N{NAME} must be resolved by the lexer
c3c41406 2792
f4e361c7
FC
2793(F) When compiling a regex pattern, an unresolved named character or
2794sequence was encountered. This can happen in any of several ways that
2795bypass the lexer, such as using single-quotish context, or an extra
7fae04b9 2796backslash in double-quotish:
c3c41406
KW
2797
2798 $re = '\N{SPACE}'; # Wrong!
b09c05e6 2799 $re = "\\N{SPACE}"; # Wrong!
c3c41406
KW
2800 /$re/;
2801
b09c05e6 2802Instead, use double-quotes with a single backslash:
c3c41406
KW
2803
2804 $re = "\N{SPACE}"; # ok
2805 /$re/;
2806
2807The lexer can be bypassed as well by creating the pattern from smaller
2808components:
2809
2810 $re = '\N';
2811 /${re}{SPACE}/; # Wrong!
2812
2813It's not a good idea to split a construct in the middle like this, and it
2814doesn't work here. Instead use the solution above.
2815
2816Finally, the message also can happen under the C</x> regex modifier when the
2817C<\N> is separated by spaces from the C<{>, in which case, remove the spaces.
2818
2819 /\N {SPACE}/x; # Wrong!
2820 /\N{SPACE}/x; # ok
ff3f963a 2821
49704364
LW
2822=item Negative '/' count in unpack
2823
2824(F) The length count obtained from a length/code unpack operation was
2825negative. See L<perlfunc/pack>.
2826
a0d0e21e
LW
2827=item Negative length
2828
be771a83
GS
2829(F) You tried to do a read/write/send/recv operation with a buffer
2830length that is less than 0. This is difficult to imagine.
a0d0e21e 2831
ed9aa3b7
SG
2832=item Negative offset to vec in lvalue context
2833
2834(F) When C<vec> is called in an lvalue context, the second argument must be
2835greater than or equal to zero.
2836
7253e4e3 2837=item Nested quantifiers in regex; marked by <-- HERE in m/%s/
a0d0e21e 2838
b45f050a 2839(F) You can't quantify a quantifier without intervening parentheses. So
7253e4e3 2840things like ** or +* or ?* are illegal. The <-- HERE shows in the regular
b45f050a 2841expression about where the problem was discovered.
a0d0e21e 2842
7253e4e3 2843Note that the minimal matching quantifiers, C<*?>, C<+?>, and
be771a83 2844C<??> appear to be nested quantifiers, but aren't. See L<perlre>.
a0d0e21e 2845
6df41af2 2846=item %s never introduced
a0d0e21e 2847
be771a83
GS
2848(S internal) The symbol in question was declared but somehow went out of
2849scope before it could possibly have been used.
a0d0e21e 2850
2c7d6b9c
RGS
2851=item next::method/next::can/maybe::next::method cannot find enclosing method
2852
2853(F) C<next::method> needs to be called within the context of a
2854real method in a real package, and it could not find such a context.
2855See L<mro>.
2856
a0d0e21e
LW
2857=item No %s allowed while running setuid
2858
be771a83
GS
2859(F) Certain operations are deemed to be too insecure for a setuid or
2860setgid script to even be allowed to attempt. Generally speaking there
2861will be another way to do what you want that is, if not secure, at least
2862securable. See L<perlsec>.
a0d0e21e 2863
a0d0e21e
LW
2864=item No comma allowed after %s
2865
2866(F) A list operator that has a filehandle or "indirect object" is not
2867allowed to have a comma between that and the following arguments.
2868Otherwise it'd be just another one of the arguments.
2869
0a753a76
PP
2870One possible cause for this is that you expected to have imported a
2871constant to your name space with B<use> or B<import> while no such
2872importing took place, it may for example be that your operating system
2873does not support that particular constant. Hopefully you did use an
f7af5ce1 2874explicit import list for the constants you expect to see; please see
0a753a76
PP
2875L<perlfunc/use> and L<perlfunc/import>. While an explicit import list
2876would probably have caught this error earlier it naturally does not
2877remedy the fact that your operating system still does not support that
2878constant. Maybe you have a typo in the constants of the symbol import
2879list of B<use> or B<import> or in the constant name at the line where
2880this error was triggered?
2881
748a9306
LW
2882=item No command into which to pipe on command line
2883
be771a83
GS
2884(F) An error peculiar to VMS. Perl handles its own command line
2885redirection, and found a '|' at the end of the command line, so it
2886doesn't know where you want to pipe the output from this command.
748a9306 2887
a0d0e21e
LW
2888=item No DB::DB routine defined
2889
be771a83 2890(F) The currently executing code was compiled with the B<-d> switch, but
f7af5ce1 2891for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
ccafdc96
RGS
2892module) didn't define a routine to be called at the beginning of each
2893statement.
a0d0e21e
LW
2894
2895=item No dbm on this machine
2896
2897(P) This is counted as an internal error, because every machine should
5f05dabc 2898supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
a0d0e21e 2899
ccafdc96 2900=item No DB::sub routine defined
a0d0e21e 2901
ccafdc96
RGS
2902(F) The currently executing code was compiled with the B<-d> switch, but
2903for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
2904module) didn't define a C<DB::sub> routine to be called at the beginning
2905of each ordinary subroutine call.
a0d0e21e 2906
c47ff5f1 2907=item No error file after 2> or 2>> on command line
748a9306 2908
be771a83
GS
2909(F) An error peculiar to VMS. Perl handles its own command line
2910redirection, and found a '2>' or a '2>>' on the command line, but can't
2911find the name of the file to which to write data destined for stderr.
748a9306 2912
49704364
LW
2913=item No group ending character '%c' found in template
2914
2915(F) A pack or unpack template has an opening '(' or '[' without its
2916matching counterpart. See L<perlfunc/pack>.
2917
c47ff5f1 2918=item No input file after < on command line
748a9306 2919
be771a83
GS
2920(F) An error peculiar to VMS. Perl handles its own command line
2921redirection, and found a '<' on the command line, but can't find the
2922name of the file from which to read data for stdin.
748a9306 2923
2c7d6b9c
RGS
2924=item No next::method '%s' found for %s
2925
2926(F) C<next::method> found no further instances of this method name
2927in the remaining packages of the MRO of this class. If you don't want
2928it throwing an exception, use C<maybe::next::method>
2929or C<next::can>. See L<mro>.
2930
6df41af2
GS
2931=item "no" not allowed in expression
2932
be771a83
GS
2933(F) The "no" keyword is recognized and executed at compile time, and
2934returns no useful value. See L<perlmod>.
6df41af2 2935
c47ff5f1 2936=item No output file after > on command line
748a9306 2937
be771a83
GS
2938(F) An error peculiar to VMS. Perl handles its own command line
2939redirection, and found a lone '>' at the end of the command line, so it
2940doesn't know where you wanted to redirect stdout.
748a9306 2941
c47ff5f1 2942=item No output file after > or >> on command line
748a9306 2943
be771a83
GS
2944(F) An error peculiar to VMS. Perl handles its own command line
2945redirection, and found a '>' or a '>>' on the command line, but can't
2946find the name of the file to which to write data destined for stdout.
748a9306 2947
1ec3e8de
GS
2948=item No package name allowed for variable %s in "our"
2949
be771a83
GS
2950(F) Fully qualified variable names are not allowed in "our"
2951declarations, because that doesn't make much sense under existing
2952semantics. Such syntax is reserved for future extensions.
1ec3e8de 2953
a0d0e21e
LW
2954=item No Perl script found in input
2955
2956(F) You called C<perl -x>, but no line was found in the file beginning
2957with #! and containing the word "perl".
2958
2959=item No setregid available
2960
2961(F) Configure didn't find anything resembling the setregid() call for
2962your system.
2963
2964=item No setreuid available
2965
2966(F) Configure didn't find anything resembling the setreuid() call for
2967your system.
2968
6df41af2
GS
2969=item No %s specified for -%c
2970
2971(F) The indicated command line switch needs a mandatory argument, but
2972you haven't specified one.
f7af5ce1 2973
e75d1f10
RD
2974=item No such class field "%s" in variable %s of type %s
2975
2976(F) You tried to access a key from a hash through the indicated typed variable
2977but that key is not allowed by the package of the same type. The indicated
2978package has restricted the set of allowed keys using the L<fields> pragma.
2979
2c692339
RGS
2980=item No such class %s
2981
dc7e5945
FC
2982(F) You provided a class qualifier in a "my", "our" or "state"
2983declaration, but this class doesn't exist at this point in your program.
2c692339 2984
3c20a832
SP
2985=item No such hook: %s
2986
dc7e5945
FC
2987(F) You specified a signal hook that was not recognized by Perl.
2988Currently, Perl accepts C<__DIE__> and C<__WARN__> as valid signal hooks.
3c20a832 2989
6df41af2
GS
2990=item No such pipe open
2991
2992(P) An error peculiar to VMS. The internal routine my_pclose() tried to
be771a83
GS
2993close a pipe which hadn't been opened. This should have been caught
2994earlier as an attempt to close an unopened filehandle.
6df41af2 2995
a0d0e21e
LW
2996=item No such signal: SIG%s
2997
be771a83
GS
2998(W signal) You specified a signal name as a subscript to %SIG that was
2999not recognized. Say C<kill -l> in your shell to see the valid signal
3000names on your system.
a0d0e21e
LW
3001
3002=item Not a CODE reference
3003
3004(F) Perl was trying to evaluate a reference to a code value (that is, a
3005subroutine), but found a reference to something else instead. You can
be771a83
GS
3006use the ref() function to find out what kind of ref it really was. See
3007also L<perlref>.
a0d0e21e
LW
3008
3009=item Not a format reference
3010
3011(F) I'm not sure how you managed to generate a reference to an anonymous
3012format, but this indicates you did, and that it didn't exist.
3013
3014=item Not a GLOB reference
3015
be771a83
GS
3016(F) Perl was trying to evaluate a reference to a "typeglob" (that is, a
3017symbol table entry that looks like C<*foo>), but found a reference to
3018something else instead. You can use the ref() function to find out what
3019kind of ref it really was. See L<perlref>.
a0d0e21e
LW
3020
3021=item Not a HASH reference
3022
be771a83
GS
3023(F) Perl was trying to evaluate a reference to a hash value, but found a
3024reference to something else instead. You can use the ref() function to
3025find out what kind of ref it really was. See L<perlref>.
a0d0e21e 3026
6df41af2
GS
3027=item Not an ARRAY reference
3028
be771a83
GS
3029(F) Perl was trying to evaluate a reference to an array value, but found
3030a reference to something else instead. You can use the ref() function
3031to find out what kind of ref it really was. See L<perlref>.
6df41af2 3032
d4fc4415
FC
3033=item Not an unblessed ARRAY reference
3034
3035(F) You passed a reference to a blessed array to C<push>, C<shift> or
3036another array function. These only accept unblessed array references
3037or arrays beginning explicitly with C<@>.
3038
a0d0e21e
LW
3039=item Not a SCALAR reference
3040
be771a83
GS
3041(F) Perl was trying to evaluate a reference to a scalar value, but found
3042a reference to something else instead. You can use the ref() function
3043to find out what kind of ref it really was. See L<perlref>.
a0d0e21e
LW
3044
3045=item Not a subroutine reference
3046
3047(F) Perl was trying to evaluate a reference to a code value (that is, a
3048subroutine), but found a reference to something else instead. You can
be771a83
GS
3049use the ref() function to find out what kind of ref it really was. See
3050also L<perlref>.
a0d0e21e 3051
e7ea3e70 3052=item Not a subroutine reference in overload table
a0d0e21e
LW
3053
3054(F) An attempt was made to specify an entry in an overloading table that
8b1a09fc 3055doesn't somehow point to a valid subroutine. See L<overload>.
a0d0e21e 3056
a0d0e21e
LW
3057=item Not enough arguments for %s
3058
3059(F) The function requires more arguments than you specified.
3060
6df41af2
GS
3061=item Not enough format arguments
3062
be771a83
GS
3063(W syntax) A format specified more picture fields than the next line
3064supplied. See L<perlform>.
6df41af2
GS
3065
3066=item %s: not found
3067
be771a83
GS
3068(A) You've accidentally run your script through the Bourne shell instead
3069of Perl. Check the #! line, or manually feed your script into Perl
3070yourself.
6df41af2
GS
3071
3072=item no UTC offset information; assuming local time is UTC
a0d0e21e 3073
6df41af2
GS
3074(S) A warning peculiar to VMS. Perl was unable to find the local
3075timezone offset, so it's assuming that local system time is equivalent
be771a83
GS
3076to UTC. If it's not, define the logical name
3077F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which
3078need to be added to UTC to get local time.
a0d0e21e 3079
f0a2b745
KW
3080=item Non-octal character '%c'. Resolved as "%s"
3081
5493e060
FC
3082(W digit) In parsing an octal numeric constant, a character was
3083unexpectedly encountered that isn't octal. The resulting value is as
3084indicated.
f0a2b745 3085
4ef2275c
GA
3086=item Non-string passed as bitmask
3087
3088(W misc) A number has been passed as a bitmask argument to select().
3089Use the vec() function to construct the file descriptor bitmasks for
bc4b151d 3090select. See L<perlfunc/select>.
4ef2275c 3091
a0d0e21e
LW
3092=item Null filename used
3093
be771a83
GS
3094(F) You can't require the null filename, especially because on many
3095machines that means the current directory! See L<perlfunc/require>.
a0d0e21e 3096
6df41af2
GS
3097=item NULL OP IN RUN
3098
be771a83
GS
3099(P debugging) Some internal routine called run() with a null opcode
3100pointer.
6df41af2 3101
55497cff
PP
3102=item Null picture in formline
3103
3104(F) The first argument to formline must be a valid format picture
3105specification. It was found to be empty, which probably means you
3106supplied it an uninitialized value. See L<perlform>.
3107
a0d0e21e
LW
3108=item Null realloc
3109
3110(P) An attempt was made to realloc NULL.
3111
3112=item NULL regexp argument
3113
5f05dabc 3114(P) The internal pattern matching routines blew it big time.
a0d0e21e
LW
3115
3116=item NULL regexp parameter
3117
3118(P) The internal pattern matching routines are out of their gourd.
3119
fc36a67e
PP
3120=item Number too long
3121
be771a83 3122(F) Perl limits the representation of decimal numbers in programs to
da75cd15 3123about 250 characters. You've exceeded that length. Future
be771a83
GS
3124versions of Perl are likely to eliminate this arbitrary limitation. In
3125the meantime, try using scientific notation (e.g. "1e6" instead of
3126"1_000_000").
fc36a67e 3127
f0a2b745
KW
3128=item Number with no digits
3129
1043934d
FC
3130(F) Perl was looking for a number but found nothing that looked like
3131a number. This happens, for example with C<\o{}>, with no number between
3132the braces.
f0a2b745 3133
6df41af2
GS
3134=item Octal number in vector unsupported
3135
be771a83
GS
3136(F) Numbers with a leading C<0> are not currently allowed in vectors.
3137The octal number interpretation of such numbers may be supported in a
3138future version.
6df41af2 3139
252aa082
JH
3140=item Octal number > 037777777777 non-portable
3141
75b44862 3142(W portable) The octal number you specified is larger than 2**32-1
be771a83
GS
3143(4294967295) and therefore non-portable between systems. See
3144L<perlport> for more on portability concerns.
252aa082 3145
6ad11d81
JH
3146=item Odd number of arguments for overload::constant
3147
04a80ee0
RGS
3148(W overload) The call to overload::constant contained an odd number of
3149arguments. The arguments should come in pairs.
6ad11d81 3150
b21befc1
MG
3151=item Odd number of elements in anonymous hash
3152
3153(W misc) You specified an odd number of elements to initialize a hash,
3154which is odd, because hashes come in key/value pairs.
3155
1930e939 3156=item Odd number of elements in hash assignment
a0d0e21e 3157
be771a83
GS
3158(W misc) You specified an odd number of elements to initialize a hash,
3159which is odd, because hashes come in key/value pairs.
a0d0e21e 3160
bbce6d69
PP
3161=item Offset outside string
3162
a4a4c9e2 3163(F|W layer) You tried to do a read/write/send/recv/seek operation
42bc49da 3164with an offset pointing outside the buffer. This is difficult to
f5a7294f
JH
3165imagine. The sole exceptions to this are that zero padding will
3166take place when going past the end of the string when either
3167C<sysread()>ing a file, or when seeking past the end of a scalar opened
1a7a2554
MB
3168for I/O (in anticipation of future reads and to imitate the behaviour
3169with real files).
bbce6d69 3170
c289d2f7 3171=item %s() on unopened %s
2dd78f96
JH
3172
3173(W unopened) An I/O operation was attempted on a filehandle that was
3174never initialized. You need to do an open(), a sysopen(), or a socket()
3175call, or call a constructor from the FileHandle package.
3176
96ebfdd7
RK
3177=item -%s on unopened filehandle %s
3178
3179(W unopened) You tried to invoke a file test operator on a filehandle
3180that isn't open. Check your control flow. See also L<perlfunc/-X>.
3181
a0d0e21e
LW
3182=item oops: oopsAV
3183
e476b1b5 3184(S internal) An internal warning that the grammar is screwed up.
a0d0e21e
LW
3185
3186=item oops: oopsHV
3187
e476b1b5 3188(S internal) An internal warning that the grammar is screwed up.
a0d0e21e 3189
abc718f2
RGS
3190=item Opening dirhandle %s also as a file
3191
a4a4c9e2 3192(W io, deprecated) You used open() to associate a filehandle to
abc718f2
RGS
3193a symbol (glob or scalar) that already holds a dirhandle.
3194Although legal, this idiom might render your code confusing
3195and is deprecated.
3196
3197=item Opening filehandle %s also as a directory
3198
a4a4c9e2 3199(W io, deprecated) You used opendir() to associate a dirhandle to
abc718f2
RGS
3200a symbol (glob or scalar) that already holds a filehandle.
3201Although legal, this idiom might render your code confusing
3202and is deprecated.
3203
a0288114 3204=item Operation "%s": no method found, %s
44a8e56a 3205
be771a83
GS
3206(F) An attempt was made to perform an overloaded operation for which no
3207handler was defined. While some handlers can be autogenerated in terms
3208of other handlers, there is no default handler for any operation, unless
e4aad80d 3209the C<fallback> overloading key is specified to be true. See L<overload>.
44a8e56a 3210
5ff1373f 3211=item Operation "%s" returns its argument for non-Unicode code point 0x%X
9ae3ac1a 3212
8457b38f
KW
3213(W utf8, non_unicode) You performed an operation requiring Unicode
3214semantics on a code
5ff1373f
FC
3215point that is not in Unicode, so what it should do is not defined. Perl
3216has chosen to have it do nothing, and warn you.
9ae3ac1a
KW
3217
3218If the operation shown is "ToFold", it means that case-insensitive
3219matching in a regular expression was done on the code point.
3220
3221If you know what you are doing you can turn off this warning by
8457b38f 3222C<no warnings 'non_unicode';>.
9ae3ac1a 3223
5ff1373f 3224=item Operation "%s" returns its argument for UTF-16 surrogate U+%X
9ae3ac1a 3225
8457b38f
KW
3226(W utf8, surrogate) You performed an operation requiring Unicode
3227semantics on a Unicode
5ff1373f
FC
3228surrogate. Unicode frowns upon the use of surrogates for anything but
3229storing strings in UTF-16, but semantics are (reluctantly) defined for
3230the surrogates, and they are to do nothing for this operation. Because
3231the use of surrogates can be dangerous, Perl warns.
9ae3ac1a
KW
3232
3233If the operation shown is "ToFold", it means that case-insensitive
3234matching in a regular expression was done on the code point.
3235
3236If you know what you are doing you can turn off this warning by
8457b38f 3237C<no warnings 'surrogate';>.
9ae3ac1a 3238
748a9306
LW
3239=item Operator or semicolon missing before %s
3240
be771a83
GS
3241(S ambiguous) You used a variable or subroutine call where the parser
3242was expecting an operator. The parser has assumed you really meant to
3243use an operator, but this is highly likely to be incorrect. For
3244example, if you say "*foo *foo" it will be interpreted as if you said
3245"*foo * 'foo'".
748a9306 3246
6df41af2
GS
3247=item "our" variable %s redeclared
3248
be771a83
GS
3249(W misc) You seem to have already declared the same global once before
3250in the current lexical scope.
6df41af2 3251
a80b8354
GS
3252=item Out of memory!
3253
3254(X) The malloc() function returned 0, indicating there was insufficient
be771a83
GS
3255remaining memory (or virtual memory) to satisfy the request. Perl has
3256no option but to exit immediately.
a80b8354 3257
19a52907
JH
3258At least in Unix you may be able to get past this by increasing your
3259process datasize limits: in csh/tcsh use C<limit> and
3260C<limit datasize n> (where C<n> is the number of kilobytes) to check
3261the current limits and change them, and in ksh/bash/zsh use C<ulimit -a>
3262and C<ulimit -d n>, respectively.
3263
6d3b25aa
RGS
3264=item Out of memory during %s extend
3265
3266(X) An attempt was made to extend an array, a list, or a string beyond
3267the largest possible memory allocation.
3268
6df41af2 3269=item Out of memory during "large" request for %s
a0d0e21e 3270
6df41af2
GS
3271(F) The malloc() function returned 0, indicating there was insufficient
3272remaining memory (or virtual memory) to satisfy the request. However,
be771a83
GS
3273the request was judged large enough (compile-time default is 64K), so a
3274possibility to shut down by trapping this error is granted.
a0d0e21e 3275
1b979e0a 3276=item Out of memory during request for %s
a0d0e21e 3277
be771a83
GS
3278(X|F) The malloc() function returned 0, indicating there was
3279insufficient remaining memory (or virtual memory) to satisfy the
3280request.
eff9c6e2
CS
3281
3282The request was judged to be small, so the possibility to trap it
3283depends on the way perl was compiled. By default it is not trappable.
be771a83
GS
3284However, if compiled for this, Perl may use the contents of C<$^M> as an
3285emergency pool after die()ing with this message. In this case the error
b022d2d2
IZ
3286is trappable I<once>, and the error message will include the line and file
3287where the failed request happened.
55497cff 3288
1b979e0a
IZ
3289=item Out of memory during ridiculously large request
3290
3291(F) You can't allocate more than 2^31+"small amount" bytes. This error
be771a83
GS
3292is most likely to be caused by a typo in the Perl program. e.g.,
3293C<$arr[time]> instead of C<$arr[$time]>.
1b979e0a 3294
6df41af2
GS
3295=item Out of memory for yacc stack
3296
be771a83
GS
3297(F) The yacc parser wanted to grow its stack so it could continue
3298parsing, but realloc() wouldn't give it more memory, virtual or
3299otherwise.
6df41af2 3300
28be1210
TH
3301=item '.' outside of string in pack
3302
3303(F) The argument to a '.' in your template tried to move the working
3304position to before the start of the packed string being built.
3305
49704364 3306=item '@' outside of string in unpack
6df41af2 3307
49704364 3308(F) You had a template that specified an absolute position outside
6df41af2
GS
3309the string being unpacked. See L<perlfunc/pack>.
3310
f337b084
TH
3311=item '@' outside of string with malformed UTF-8 in unpack
3312
3313(F) You had a template that specified an absolute position outside
3314the string being unpacked. The string being unpacked was also invalid
3315UTF-8. See L<perlfunc/pack>.
3316
7cb0cfe6
BM
3317=item Overloaded dereference did not return a reference
3318
3319(F) An object with an overloaded dereference operator was dereferenced,
3320but the overloaded operation did not return a reference. See
3321L<overload>.
3322
3323=item Overloaded qr did not return a REGEXP
3324
3325(F) An object with a C<qr> overload was used as part of a match, but the
3326overloaded operation didn't return a compiled regexp. See L<overload>.
3327
6df41af2
GS
3328=item %s package attribute may clash with future reserved word: %s
3329
be771a83
GS
3330(W reserved) A lowercase attribute name was used that had a
3331package-specific handler. That name might have a meaning to Perl itself
3332some day, even though it doesn't yet. Perhaps you should use a
3333mixed-case attribute name, instead. See L<attributes>.
6df41af2 3334
96ebfdd7
RK
3335=item pack/unpack repeat count overflow
3336
3337(F) You can't specify a repeat count so large that it overflows your
3338signed integers. See L<perlfunc/pack>.
3339
a0d0e21e
LW
3340=item page overflow
3341
be771a83
GS
3342(W io) A single call to write() produced more lines than can fit on a
3343page. See L<perlform>.
a0d0e21e 3344