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perldiag: more alphabetisation
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1=head1 NAME
2
3perldiag - various Perl diagnostics
4
5=head1 DESCRIPTION
6
7These messages are classified as follows (listed in increasing order of
8desperation):
9
10 (W) A warning (optional).
d1d15184 11 (D) A deprecation (enabled by default).
00eb3f2b 12 (S) A severe warning (enabled by default).
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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.
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20
21If a message can be controlled by the C<warnings> pragma, its warning
22category is included with the classification letter in the description
466416ed 23below. E.g. C<(W closed)> means a warning in the C<closed> category.
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24
25Optional warnings are enabled by using the C<warnings> pragma or the B<-w>
fa816bf3 26and B<-W> switches. Warnings may be captured by setting C<$SIG{__WARN__}>
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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
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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.
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44
45=over 4
46
6df41af2 47=item accept() on closed socket %s
33633739 48
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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
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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
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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
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76to be an object method (see L<perlsub/"Subroutine Attributes"> or
77L<attributes>).
43192e07 78
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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
7c7af292 88(S ambiguous) You said something that may not be interpreted the way
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89you thought. Normally it's pretty easy to disambiguate it by supplying
90a missing quote, operator, parenthesis pair or declaration.
a0d0e21e 91
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92=item Ambiguous use of %c resolved as operator %c
93
7c7af292 94(S ambiguous) C<%>, C<&>, and C<*> are both infix operators (modulus,
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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
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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
1cecf2c0 107the variable, you can just write C<@foo>. If you wanted to call the
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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
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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
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115(W ambiguous) You wrote something like C<${foo[2]}> (where foo represents
116the name of a Perl keyword), which might be looking for element number
1172 of the array named C<@foo>, in which case please write C<$foo[2]>, or you
118might have meant to pass an anonymous arrayref to the function named
119foo, and then do a scalar deref on the value it returns. If you meant
120that, write C<${foo([2])}>.
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121
122In regular expressions, the C<${foo[2]}> syntax is sometimes necessary
123to disambiguate between array subscripts and character classes.
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124C</$length[2345]/>, for instance, will be interpreted as C<$length> followed
125by the character class C<[2345]>. If an array subscript is what you
126want, you can avoid the warning by changing C</${length[2345]}/> to the
127unsightly C</${\$length[2345]}/>, by renaming your array to something
128that does not coincide with a built-in keyword, or by simply turning
129off warnings with C<no warnings 'ambiguous';>.
4da60377 130
bdac9d71 131=item Ambiguous use of -%s resolved as -&%s()
397d0f13 132
7c7af292 133(S ambiguous) You wrote something like C<-foo>, which might be the
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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,
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136write C<-foo()>.
137
6df41af2 138=item '|' and '<' may not both be specified on command line
a0d0e21e 139
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140(F) An error peculiar to VMS. Perl does its own command line
141redirection, and found that STDIN was a pipe, and that you also tried to
142redirect STDIN using '<'. Only one STDIN stream to a customer, please.
c9f97d15 143
6df41af2 144=item '|' and '>' may not both be specified on command line
1028017a 145
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146(F) An error peculiar to VMS. Perl does its own command line
147redirection, and thinks you tried to redirect stdout both to a file and
148into a pipe to another command. You need to choose one or the other,
149though nothing's stopping you from piping into a program or Perl script
150which 'splits' output into two streams, such as
1028017a 151
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152 open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
153 while (<STDIN>) {
154 print;
155 print OUT;
156 }
157 close OUT;
c9f97d15 158
6df41af2 159=item Applying %s to %s will act on scalar(%s)
eb6e2d6f 160
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161(W misc) The pattern match (C<//>), substitution (C<s///>), and
162transliteration (C<tr///>) operators work on scalar values. If you apply
be771a83 163one of them to an array or a hash, it will convert the array or hash to
ac036724 164a scalar value (the length of an array, or the population info of a
165hash) and then work on that scalar value. This is probably not what
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166you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for
167alternatives.
eb6e2d6f 168
6df41af2 169=item Arg too short for msgsnd
76cd736e 170
6df41af2 171(F) msgsnd() requires a string at least as long as sizeof(long).
76cd736e 172
b0fdf69e 173=item %s argument is not a HASH or ARRAY element or a subroutine
a0d0e21e 174
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175(F) The argument to exists() must be a hash or array element or a
176subroutine with an ampersand, such as:
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177
178 $foo{$bar}
cb4f522a 179 $ref->{"susie"}[12]
cc1c2e42 180 &do_something
a0d0e21e 181
8ea97a1e 182=item %s argument is not a HASH or ARRAY element or slice
5f05dabc 183
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184(F) The argument to delete() must be either a hash or array element,
185such as:
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186
187 $foo{$bar}
cb4f522a 188 $ref->{"susie"}[12]
5f05dabc 189
8ea97a1e 190or a hash or array slice, such as:
5f05dabc 191
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192 @foo[$bar, $baz, $xyzzy]
193 @{$ref->[12]}{"susie", "queue"}
5315574d 194
6df41af2 195=item %s argument is not a subroutine name
a0d0e21e 196
6df41af2 197(F) The argument to exists() for C<exists &sub> must be a subroutine
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198name, and not a subroutine call. C<exists &sub()> will generate this
199error.
a0d0e21e 200
f86702cc 201=item Argument "%s" isn't numeric%s
a0d0e21e 202
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203(W numeric) The indicated string was fed as an argument to an operator
204that expected a numeric value instead. If you're fortunate the message
205will identify which operator was so unfortunate.
a0d0e21e 206
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207=item Argument list not closed for PerlIO layer "%s"
208
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209(W layer) When pushing a layer with arguments onto the Perl I/O
210system you forgot the ) that closes the argument list. (Layers
211take care of transforming data between external and internal
212representations.) Perl stopped parsing the layer list at this
213point and did not attempt to push this layer. If your program
214didn't explicitly request the failing operation, it may be the
215result of the value of the environment variable PERLIO.
b4581f09 216
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217=item Array @%s missing the @ in argument %d of %s()
218
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219(D deprecated) Really old Perl let you omit the @ on array names in some
220spots. This is now heavily deprecated.
a0d0e21e 221
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222=item A sequence of multiple spaces in a charnames alias definition is deprecated
223
224(D) You defined a character name which had multiple space characters in
225a row. Change them to single spaces. Usually these names are defined
226in the C<:alias> import argument to C<use charnames>, but they could be
227defined by a translator installed into C<$^H{charnames}>. See
228L<charnames/CUSTOM ALIASES>.
229
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230=item assertion botched: %s
231
21b5e840 232(X) The malloc package that comes with Perl had an internal failure.
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233
234=item Assertion failed: file "%s"
235
21b5e840 236(X) A general assertion failed. The file in question must be examined.
a0d0e21e 237
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238=item Assigning non-zero to $[ is no longer possible
239
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240(F) When the "array_base" feature is disabled (e.g., under C<use v5.16;>)
241the special variable C<$[>, which is deprecated, is now a fixed zero value.
82122228 242
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243=item Assignment to both a list and a scalar
244
245(F) If you assign to a conditional operator, the 2nd and 3rd arguments
246must either both be scalars or both be lists. Otherwise Perl won't
247know which context to supply to the right side.
248
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249=item A thread exited while %d threads were running
250
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251(W threads)(S) When using threaded Perl, a thread (not necessarily
252the main thread) exited while there were still other threads running.
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253Usually it's a good idea first to collect the return values of the
254created threads by joining them, and only then to exit from the main
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255thread. See L<threads>.
256
2393f1b9 257=item Attempt to access disallowed key '%s' in a restricted hash
1b1f1335 258
49293501 259(F) The failing code has attempted to get or set a key which is not in
2393f1b9 260the current set of allowed keys of a restricted hash.
49293501 261
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262=item Attempt to bless into a reference
263
264(F) The CLASSNAME argument to the bless() operator is expected to be
57dedab9 265the name of the package to bless the resulting object into. You've
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266supplied instead a reference to something: perhaps you wrote
267
268 bless $self, $proto;
269
270when you intended
271
272 bless $self, ref($proto) || $proto;
273
274If you actually want to bless into the stringified version
275of the reference supplied, you need to stringify it yourself, for
276example by:
277
278 bless $self, "$proto";
279
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280=item Attempt to clear deleted array
281
282(S debugging) An array was assigned to when it was being freed.
283Freed values are not supposed to be visible to Perl code. This
284can also happen if XS code calls C<av_clear> from a custom magic
285callback on the array.
286
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287=item Attempt to delete disallowed key '%s' from a restricted hash
288
289(F) The failing code attempted to delete from a restricted hash a key
290which is not in its key set.
291
292=item Attempt to delete readonly key '%s' from a restricted hash
293
294(F) The failing code attempted to delete a key whose value has been
295declared readonly from a restricted hash.
296
de42a5a9 297=item Attempt to free non-arena SV: 0x%x
a0d0e21e 298
f84fe999 299(S internal) All SV objects are supposed to be allocated from arenas
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300that will be garbage collected on exit. An SV was discovered to be
301outside any of those arenas.
a0d0e21e 302
12578ffb 303=item Attempt to free nonexistent shared string '%s'%s
bbce6d69 304
f84fe999 305(S internal) Perl maintains a reference-counted internal table of
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306strings to optimize the storage and access of hash keys and other
307strings. This indicates someone tried to decrement the reference count
308of a string that can no longer be found in the table.
bbce6d69 309
7d5b40b4 310=item Attempt to free temp prematurely: SV 0x%x
a0d0e21e 311
f84fe999 312(S debugging) Mortalized values are supposed to be freed by the
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313free_tmps() routine. This indicates that something else is freeing the
314SV before the free_tmps() routine gets a chance, which means that the
315free_tmps() routine will be freeing an unreferenced scalar when it does
316try to free it.
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317
318=item Attempt to free unreferenced glob pointers
319
f84fe999 320(S internal) The reference counts got screwed up on symbol aliases.
a0d0e21e 321
7d5b40b4 322=item Attempt to free unreferenced scalar: SV 0x%x
a0d0e21e 323
8f7e4d2c 324(S internal) Perl went to decrement the reference count of a scalar to
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325see if it would go to 0, and discovered that it had already gone to 0
326earlier, and should have been freed, and in fact, probably was freed.
327This could indicate that SvREFCNT_dec() was called too many times, or
328that SvREFCNT_inc() was called too few times, or that the SV was
329mortalized when it shouldn't have been, or that memory has been
330corrupted.
a0d0e21e 331
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332=item Attempt to join self
333
334(F) You tried to join a thread from within itself, which is an
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335impossible task. You may be joining the wrong thread, or you may need
336to move the join() to some other thread.
dcdda58d 337
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338=item Attempt to pack pointer to temporary value
339
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340(W pack) You tried to pass a temporary value (like the result of a
341function, or a computed expression) to the "p" pack() template. This
342means the result contains a pointer to a location that could become
343invalid anytime, even before the end of the current statement. Use
344literals or global values as arguments to the "p" pack() template to
345avoid this warning.
84902520 346
087b5369
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347=item Attempt to reload %s aborted.
348
349(F) You tried to load a file with C<use> or C<require> that failed to
350compile once already. Perl will not try to compile this file again
351unless you delete its entry from %INC. See L<perlfunc/require> and
352L<perlvar/%INC>.
353
1b20cd17
NC
354=item Attempt to set length of freed array
355
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FC
356(W misc) You tried to set the length of an array which has
357been freed. You can do this by storing a reference to the
358scalar representing the last index of an array and later
359assigning through that reference. For example
1b20cd17
NC
360
361 $r = do {my @a; \$#a};
362 $$r = 503
363
b7a902f4
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364=item Attempt to use reference as lvalue in substr
365
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366(W substr) You supplied a reference as the first argument to substr()
367used as an lvalue, which is pretty strange. Perhaps you forgot to
368dereference it first. See L<perlfunc/substr>.
b7a902f4 369
c32124fe
NC
370=item Attribute "locked" is deprecated
371
57dedab9
FC
372(D deprecated) You have used the attributes pragma to modify the
373"locked" attribute on a code reference. The :locked attribute is
374obsolete, has had no effect since 5005 threads were removed, and
375will be removed in a future release of Perl 5.
c32124fe 376
f1a3ce43
NC
377=item Attribute "unique" is deprecated
378
57dedab9
FC
379(D deprecated) You have used the attributes pragma to modify
380the "unique" attribute on an array, hash or scalar reference.
381The :unique attribute has had no effect since Perl 5.8.8, and
382will be removed in a future release of Perl 5.
f1a3ce43 383
ccce04a4
FC
384=item av_reify called on tied array
385
386(S debugging) This indicates that something went wrong and Perl got I<very>
387confused about C<@_> or C<@DB::args> being tied.
388
de42a5a9 389=item Bad arg length for %s, is %u, should be %d
a0d0e21e 390
be771a83
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391(F) You passed a buffer of the wrong size to one of msgctl(), semctl()
392or shmctl(). In C parlance, the correct sizes are, respectively,
5f05dabc 393S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and
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394S<sizeof(struct shmid_ds *)>.
395
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396=item Bad evalled substitution pattern
397
496a33f5 398(F) You've used the C</e> switch to evaluate the replacement for a
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399substitution, but perl found a syntax error in the code to evaluate,
400most likely an unexpected right brace '}'.
401
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402=item Bad filehandle: %s
403
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404(F) A symbol was passed to something wanting a filehandle, but the
405symbol has no filehandle associated with it. Perhaps you didn't do an
406open(), or did it in another package.
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407
408=item Bad free() ignored
409
be771a83 410(S malloc) An internal routine called free() on something that had never
fa816bf3 411been malloc()ed in the first place. Mandatory, but can be disabled by
9ea8bc6d 412setting environment variable C<PERL_BADFREE> to 0.
33c8a3fe 413
9ea8bc6d 414This message can be seen quite often with DB_File on systems with "hard"
6903afa2 415dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB>
be771a83 416which is left unnoticed if C<DB> uses I<forgiving> system malloc().
a0d0e21e 417
aa689395
PP
418=item Bad hash
419
420(P) One of the internal hash routines was passed a null HV pointer.
421
6df41af2
GS
422=item Badly placed ()'s
423
424(A) You've accidentally run your script through B<csh> instead
425of Perl. Check the #! line, or manually feed your script into
426Perl yourself.
427
a7cb8dae 428=item Bad name after %s
a0d0e21e 429
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430(F) You started to name a symbol by using a package prefix, and then
431didn't finish the symbol. In particular, you can't interpolate outside
432of quotes, so
a0d0e21e
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433
434 $var = 'myvar';
435 $sym = mypack::$var;
436
437is not the same as
438
439 $var = 'myvar';
440 $sym = "mypack::$var";
441
88e1f1a2
JV
442=item Bad plugin affecting keyword '%s'
443
444(F) An extension using the keyword plugin mechanism violated the
445plugin API.
446
4ad56ec9
IZ
447=item Bad realloc() ignored
448
6903afa2
FC
449(S malloc) An internal routine called realloc() on something that
450had never been malloc()ed in the first place. Mandatory, but can
451be disabled by setting the environment variable C<PERL_BADFREE> to 1.
4ad56ec9 452
a0d0e21e
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453=item Bad symbol for array
454
455(P) An internal request asked to add an array entry to something that
456wasn't a symbol table entry.
457
4df3f177
SP
458=item Bad symbol for dirhandle
459
460(P) An internal request asked to add a dirhandle entry to something
461that wasn't a symbol table entry.
462
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LW
463=item Bad symbol for filehandle
464
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465(P) An internal request asked to add a filehandle entry to something
466that wasn't a symbol table entry.
a0d0e21e
LW
467
468=item Bad symbol for hash
469
470(P) An internal request asked to add a hash entry to something that
471wasn't a symbol table entry.
472
34d09196
GS
473=item Bareword found in conditional
474
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475(W bareword) The compiler found a bareword where it expected a
476conditional, which often indicates that an || or && was parsed as part
477of the last argument of the previous construct, for example:
34d09196
GS
478
479 open FOO || die;
480
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481It may also indicate a misspelled constant that has been interpreted as
482a bareword:
34d09196
GS
483
484 use constant TYPO => 1;
485 if (TYOP) { print "foo" }
486
487The C<strict> pragma is useful in avoiding such errors.
488
6df41af2
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489=item Bareword "%s" not allowed while "strict subs" in use
490
491(F) With "strict subs" in use, a bareword is only allowed as a
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492subroutine identifier, in curly brackets or to the left of the "=>"
493symbol. Perhaps you need to predeclare a subroutine?
6df41af2
GS
494
495=item Bareword "%s" refers to nonexistent package
496
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497(W bareword) You used a qualified bareword of the form C<Foo::>, but the
498compiler saw no other uses of that namespace before that point. Perhaps
499you need to predeclare a package?
6df41af2 500
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501=item BEGIN failed--compilation aborted
502
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GS
503(F) An untrapped exception was raised while executing a BEGIN
504subroutine. Compilation stops immediately and the interpreter is
505exited.
a0d0e21e 506
68dc0745
PP
507=item BEGIN not safe after errors--compilation aborted
508
509(F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which
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510implies a C<BEGIN {}>) after one or more compilation errors had already
511occurred. Since the intended environment for the C<BEGIN {}> could not
512be guaranteed (due to the errors), and since subsequent code likely
513depends on its correct operation, Perl just gave up.
68dc0745 514
6df41af2
GS
515=item \1 better written as $1
516
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517(W syntax) Outside of patterns, backreferences live on as variables.
518The use of backslashes is grandfathered on the right-hand side of a
519substitution, but stylistically it's better to use the variable form
520because other Perl programmers will expect it, and it works better if
521there are more than 9 backreferences.
6df41af2 522
252aa082
JH
523=item Binary number > 0b11111111111111111111111111111111 non-portable
524
e476b1b5 525(W portable) The binary number you specified is larger than 2**32-1
9e24b6e2
JH
526(4294967295) and therefore non-portable between systems. See
527L<perlport> for more on portability concerns.
252aa082 528
69282e91 529=item bind() on closed socket %s
a0d0e21e 530
be771a83
GS
531(W closed) You tried to do a bind on a closed socket. Did you forget to
532check the return value of your socket() call? See L<perlfunc/bind>.
a0d0e21e 533
c289d2f7
JH
534=item binmode() on closed filehandle %s
535
536(W unopened) You tried binmode() on a filehandle that was never opened.
4dcecea4 537Check your control flow and number of arguments.
c289d2f7 538
d7bb0749 539=item "\b{" is deprecated; use "\b\{" or "\b[{]" instead in regex; marked by <-- HERE in m/%s/
f866a7cd 540
d7bb0749 541=item "\B{" is deprecated; use "\B\{" or "\B[{]" instead in regex; marked by <-- HERE in m/%s/
f866a7cd 542
7a88bca7 543(W deprecated) Use of an unescaped "{" immediately following a
f866a7cd 544C<\b> or C<\B> is now deprecated so as to reserve its use for Perl
d7bb0749
KW
545itself in a future release. You can either precede the brace with a
546backslash, or enclose it in square brackets; the latter is the way to go
547if the pattern delimiters are C<{}>.
f866a7cd 548
c5a0f51a
JH
549=item Bit vector size > 32 non-portable
550
e476b1b5 551(W portable) Using bit vector sizes larger than 32 is non-portable.
c5a0f51a 552
043c750c 553=item Bizarre copy of %s
4633a7c4 554
be771a83 555(P) Perl detected an attempt to copy an internal value that is not
ab830aa0 556copiable.
4633a7c4 557
5a25739d
FC
558=item Bizarre SvTYPE [%d]
559
560(P) When starting a new thread or return values from a thread, Perl
561encountered an invalid data type.
562
f675dbe5
CB
563=item Buffer overflow in prime_env_iter: %s
564
be771a83
GS
565(W internal) A warning peculiar to VMS. While Perl was preparing to
566iterate over %ENV, it encountered a logical name or symbol definition
567which was too long, so it was truncated to the string shown.
f675dbe5 568
a0d0e21e
LW
569=item Callback called exit
570
4929bf7b 571(F) A subroutine invoked from an external package via call_sv()
a0d0e21e
LW
572exited by calling exit.
573
6df41af2 574=item %s() called too early to check prototype
f675dbe5 575
be771a83
GS
576(W prototype) You've called a function that has a prototype before the
577parser saw a definition or declaration for it, and Perl could not check
578that the call conforms to the prototype. You need to either add an
579early prototype declaration for the subroutine in question, or move the
580subroutine definition ahead of the call to get proper prototype
581checking. Alternatively, if you are certain that you're calling the
582function correctly, you may put an ampersand before the name to avoid
583the warning. See L<perlsub>.
f675dbe5 584
49704364 585=item Cannot compress integer in pack
0258719b
NC
586
587(F) An argument to pack("w",...) was too large to compress. The BER
588compressed integer format can only be used with positive integers, and you
589attempted to compress Infinity or a very large number (> 1e308).
590See L<perlfunc/pack>.
591
49704364 592=item Cannot compress negative numbers in pack
0258719b
NC
593
594(F) An argument to pack("w",...) was negative. The BER compressed integer
595format can only be used with positive integers. See L<perlfunc/pack>.
596
5c1f4d79
NC
597=item Cannot convert a reference to %s to typeglob
598
6903afa2
FC
599(F) You manipulated Perl's symbol table directly, stored a reference
600in it, then tried to access that symbol via conventional Perl syntax.
601The access triggers Perl to autovivify that typeglob, but it there is
602no legal conversion from that type of reference to a typeglob.
5c1f4d79 603
4040665a 604=item Cannot copy to %s
ba2fdce6
NC
605
606(P) Perl detected an attempt to copy a value to an internal type that cannot
4dcecea4 607be directly assigned to.
ba2fdce6 608
b5d97229
RGS
609=item Cannot find encoding "%s"
610
611(S io) You tried to apply an encoding that did not exist to a filehandle,
612either with open() or binmode().
613
7355df7e
FC
614=item Cannot set tied @DB::args
615
616(F) C<caller> tried to set C<@DB::args>, but found it tied. Tying C<@DB::args>
617is not supported. (Before this error was added, it used to crash.)
618
ce65bc73
FC
619=item Cannot tie unreifiable array
620
621(P) You somehow managed to call C<tie> on an array that does not
622keep a reference count on its arguments and cannot be made to
623do so. Such arrays are not even supposed to be accessible to
624Perl code, but are only used internally.
625
96ebfdd7
RK
626=item Can only compress unsigned integers in pack
627
628(F) An argument to pack("w",...) was not an integer. The BER compressed
629integer format can only be used with positive integers, and you attempted
630to compress something else. See L<perlfunc/pack>.
631
a0d0e21e
LW
632=item Can't bless non-reference value
633
634(F) Only hard references may be blessed. This is how Perl "enforces"
635encapsulation of objects. See L<perlobj>.
636
dc57907a
RGS
637=item Can't "break" in a loop topicalizer
638
0d863452 639(F) You called C<break>, but you're in a C<foreach> block rather than
6903afa2 640a C<given> block. You probably meant to use C<next> or C<last>.
0d863452
RH
641
642=item Can't "break" outside a given block
dc57907a 643
0d863452
RH
644(F) You called C<break>, but you're not inside a C<given> block.
645
6df41af2
GS
646=item Can't call method "%s" on an undefined value
647
648(F) You used the syntax of a method call, but the slot filled by the
be771a83
GS
649object reference or package name contains an undefined value. Something
650like this will reproduce the error:
6df41af2
GS
651
652 $BADREF = undef;
653 process $BADREF 1,2,3;
654 $BADREF->process(1,2,3);
655
a0d0e21e
LW
656=item Can't call method "%s" on unblessed reference
657
54310121 658(F) A method call must know in what package it's supposed to run. It
be771a83
GS
659ordinarily finds this out from the object reference you supply, but you
660didn't supply an object reference in this case. A reference isn't an
661object reference until it has been blessed. See L<perlobj>.
a0d0e21e
LW
662
663=item Can't call method "%s" without a package or object reference
664
665(F) You used the syntax of a method call, but the slot filled by the
be771a83
GS
666object reference or package name contains an expression that returns a
667defined value which is neither an object reference nor a package name.
72b5445b
GS
668Something like this will reproduce the error:
669
670 $BADREF = 42;
671 process $BADREF 1,2,3;
672 $BADREF->process(1,2,3);
673
a0d0e21e
LW
674=item Can't chdir to %s
675
f703fc96 676(F) You called C<perl -x/foo/bar>, but F</foo/bar> is not a directory
a0d0e21e
LW
677that you can chdir to, possibly because it doesn't exist.
678
0545a864 679=item Can't check filesystem of script "%s" for nosuid
104d25b7 680
be771a83
GS
681(P) For some reason you can't check the filesystem of the script for
682nosuid.
104d25b7 683
22e74366 684=item Can't coerce %s to %s in %s
a0d0e21e
LW
685
686(F) Certain types of SVs, in particular real symbol table entries
55497cff 687(typeglobs), can't be forced to stop being what they are. So you can't
a0d0e21e
LW
688say things like:
689
690 *foo += 1;
691
692You CAN say
693
694 $foo = *foo;
695 $foo += 1;
696
697but then $foo no longer contains a glob.
698
0d863452 699=item Can't "continue" outside a when block
dc57907a 700
0d863452
RH
701(F) You called C<continue>, but you're not inside a C<when>
702or C<default> block.
703
a0d0e21e
LW
704=item Can't create pipe mailbox
705
be771a83
GS
706(P) An error peculiar to VMS. The process is suffering from exhausted
707quotas or other plumbing problems.
a0d0e21e 708
eb64745e
GS
709=item Can't declare %s in "%s"
710
30c282f6
NC
711(F) Only scalar, array, and hash variables may be declared as "my", "our" or
712"state" variables. They must have ordinary identifiers as names.
a0d0e21e 713
fc7debfb
FC
714=item Can't "default" outside a topicalizer
715
716(F) You have used a C<default> block that is neither inside a
717C<foreach> loop nor a C<given> block. (Note that this error is
718issued on exit from the C<default> block, so you won't get the
719error if you use an explicit C<continue>.)
720
6df41af2
GS
721=item Can't do inplace edit: %s is not a regular file
722
be771a83 723(S inplace) You tried to use the B<-i> switch on a special file, such as
df7075a8 724a file in /dev, a FIFO or an uneditable directory. The file was ignored.
6df41af2 725
a0d0e21e
LW
726=item Can't do inplace edit on %s: %s
727
be771a83
GS
728(S inplace) The creation of the new file failed for the indicated
729reason.
a0d0e21e 730
54310121 731=item Can't do inplace edit without backup
a0d0e21e 732
be771a83
GS
733(F) You're on a system such as MS-DOS that gets confused if you try
734reading from a deleted (but still opened) file. You have to say
735C<-i.bak>, or some such.
a0d0e21e 736
10f9c03d 737=item Can't do inplace edit: %s would not be unique
a0d0e21e 738
e476b1b5 739(S inplace) Your filesystem does not support filenames longer than 14
10f9c03d
CK
740characters and Perl was unable to create a unique filename during
741inplace editing with the B<-i> switch. The file was ignored.
a0d0e21e 742
a0d0e21e
LW
743=item Can't do waitpid with flags
744
be771a83
GS
745(F) This machine doesn't have either waitpid() or wait4(), so only
746waitpid() without flags is emulated.
a0d0e21e 747
a0d0e21e
LW
748=item Can't emulate -%s on #! line
749
be771a83
GS
750(F) The #! line specifies a switch that doesn't make sense at this
751point. For example, it'd be kind of silly to put a B<-x> on the #!
752line.
a0d0e21e 753
1109a392
MHM
754=item Can't %s %s-endian %ss on this platform
755
756(F) Your platform's byte-order is neither big-endian nor little-endian,
757or it has a very strange pointer size. Packing and unpacking big- or
758little-endian floating point values and pointers may not be possible.
759See L<perlfunc/pack>.
760
a0d0e21e
LW
761=item Can't exec "%s": %s
762
d1be9408 763(W exec) A system(), exec(), or piped open call could not execute the
be771a83
GS
764named program for the indicated reason. Typical reasons include: the
765permissions were wrong on the file, the file wasn't found in
766C<$ENV{PATH}>, the executable in question was compiled for another
767architecture, or the #! line in a script points to an interpreter that
768can't be run for similar reasons. (Or maybe your system doesn't support
769#! at all.)
a0d0e21e
LW
770
771=item Can't exec %s
772
be771a83
GS
773(F) Perl was trying to execute the indicated program for you because
774that's what the #! line said. If that's not what you wanted, you may
775need to mention "perl" on the #! line somewhere.
a0d0e21e
LW
776
777=item Can't execute %s
778
be771a83
GS
779(F) You used the B<-S> switch, but the copies of the script to execute
780found in the PATH did not have correct permissions.
2a92aaa0 781
6df41af2 782=item Can't find an opnumber for "%s"
2a92aaa0 783
be771a83
GS
784(F) A string of a form C<CORE::word> was given to prototype(), but there
785is no builtin with the name C<word>.
6df41af2 786
56ca2fc0
JH
787=item Can't find %s character property "%s"
788
789(F) You used C<\p{}> or C<\P{}> but the character property by that name
6903afa2 790could not be found. Maybe you misspelled the name of the property?
e1b711da 791See L<perluniprops/Properties accessible through \p{} and \P{}>
9b73678d 792for a complete list of available official properties.
56ca2fc0 793
6df41af2
GS
794=item Can't find label %s
795
be771a83
GS
796(F) You said to goto a label that isn't mentioned anywhere that it's
797possible for us to go to. See L<perlfunc/goto>.
2a92aaa0
GS
798
799=item Can't find %s on PATH
800
be771a83
GS
801(F) You used the B<-S> switch, but the script to execute could not be
802found in the PATH.
a0d0e21e 803
6df41af2 804=item Can't find %s on PATH, '.' not in PATH
a0d0e21e 805
be771a83
GS
806(F) You used the B<-S> switch, but the script to execute could not be
807found in the PATH, or at least not with the correct permissions. The
808script exists in the current directory, but PATH prohibits running it.
a0d0e21e
LW
809
810=item Can't find string terminator %s anywhere before EOF
811
be771a83
GS
812(F) Perl strings can stretch over multiple lines. This message means
813that the closing delimiter was omitted. Because bracketed quotes count
814nesting levels, the following is missing its final parenthesis:
a0d0e21e 815
fb73857a
PP
816 print q(The character '(' starts a side comment.);
817
97b3d10f 818If you're getting this error from a here-document, you may have
b6b8cb97
FC
819included unseen whitespace before or after your closing tag or there
820may not be a linebreak after it. A good programmer's editor will have
821a way to help you find these characters (or lack of characters). See
822L<perlop> for the full details on here-documents.
a0d0e21e 823
660a4616
ST
824=item Can't find Unicode property definition "%s"
825
5f8ad6b6
FC
826(F) You may have tried to use C<\p> which means a Unicode
827property (for example C<\p{Lu}> matches all uppercase
fa816bf3 828letters). If you did mean to use a Unicode property, see
e1b711da 829L<perluniprops/Properties accessible through \p{} and \P{}>
6903afa2 830for a complete list of available properties. If you didn't
fa816bf3
FC
831mean to use a Unicode property, escape the C<\p>, either by
832C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, or
5f8ad6b6 833until C<\E>).
660a4616 834
b3647a36 835=item Can't fork: %s
a0d0e21e 836
be771a83
GS
837(F) A fatal error occurred while trying to fork while opening a
838pipeline.
a0d0e21e 839
b3647a36
SR
840=item Can't fork, trying again in 5 seconds
841
c973c02e 842(W pipe) A fork in a piped open failed with EAGAIN and will be retried
b3647a36
SR
843after five seconds.
844
748a9306
LW
845=item Can't get filespec - stale stat buffer?
846
be771a83
GS
847(S) A warning peculiar to VMS. This arises because of the difference
848between access checks under VMS and under the Unix model Perl assumes.
849Under VMS, access checks are done by filename, rather than by bits in
850the stat buffer, so that ACLs and other protections can be taken into
851account. Unfortunately, Perl assumes that the stat buffer contains all
852the necessary information, and passes it, instead of the filespec, to
2fe2bdfd 853the access-checking routine. It will try to retrieve the filespec using
be771a83
GS
854the device name and FID present in the stat buffer, but this works only
855if you haven't made a subsequent call to the CRTL stat() routine,
856because the device name is overwritten with each call. If this warning
2fe2bdfd
FC
857appears, the name lookup failed, and the access-checking routine gave up
858and returned FALSE, just to be conservative. (Note: The access-checking
be771a83
GS
859routine knows about the Perl C<stat> operator and file tests, so you
860shouldn't ever see this warning in response to a Perl command; it arises
861only if some internal code takes stat buffers lightly.)
748a9306 862
a0d0e21e
LW
863=item Can't get pipe mailbox device name
864
be771a83
GS
865(P) An error peculiar to VMS. After creating a mailbox to act as a
866pipe, Perl can't retrieve its name for later use.
a0d0e21e
LW
867
868=item Can't get SYSGEN parameter value for MAXBUF
869
748a9306
LW
870(P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
871mailbox buffers to be, and didn't get an answer.
a0d0e21e 872
6df41af2 873=item Can't "goto" into the middle of a foreach loop
a0d0e21e 874
be771a83
GS
875(F) A "goto" statement was executed to jump into the middle of a foreach
876loop. You can't get there from here. See L<perlfunc/goto>.
6df41af2
GS
877
878=item Can't "goto" out of a pseudo block
879
be771a83
GS
880(F) A "goto" statement was executed to jump out of what might look like
881a block, except that it isn't a proper block. This usually occurs if
882you tried to jump out of a sort() block or subroutine, which is a no-no.
883See L<perlfunc/goto>.
a0d0e21e 884
5a25739d
FC
885=item Can't goto subroutine from an eval-%s
886
887(F) The "goto subroutine" call can't be used to jump out of an eval
888"string" or block.
889
9850bf21 890=item Can't goto subroutine from a sort sub (or similar callback)
cd299c6e 891
9850bf21
RH
892(F) The "goto subroutine" call can't be used to jump out of the
893comparison sub for a sort(), or from a similar callback (such
894as the reduce() function in List::Util).
895
6df41af2
GS
896=item Can't goto subroutine outside a subroutine
897
be771a83
GS
898(F) The deeply magical "goto subroutine" call can only replace one
899subroutine call for another. It can't manufacture one out of whole
900cloth. In general you should be calling it out of only an AUTOLOAD
901routine anyway. See L<perlfunc/goto>.
6df41af2 902
0b5b802d
GS
903=item Can't ignore signal CHLD, forcing to default
904
be771a83
GS
905(W signal) Perl has detected that it is being run with the SIGCHLD
906signal (sometimes known as SIGCLD) disabled. Since disabling this
907signal will interfere with proper determination of exit status of child
908processes, Perl has reset the signal to its default value. This
909situation typically indicates that the parent program under which Perl
910may be running (e.g. cron) is being very careless.
0b5b802d 911
e2c0f81f
DG
912=item Can't kill a non-numeric process ID
913
914(F) Process identifiers must be (signed) integers. It is a fatal error to
915attempt to kill() an undefined, empty-string or otherwise non-numeric
916process identifier.
917
6df41af2 918=item Can't "last" outside a loop block
4633a7c4 919
6df41af2 920(F) A "last" statement was executed to break out of the current block,
be771a83
GS
921except that there's this itty bitty problem called there isn't a current
922block. Note that an "if" or "else" block doesn't count as a "loopish"
923block, as doesn't a block given to sort(), map() or grep(). You can
924usually double the curlies to get the same effect though, because the
925inner curlies will be considered a block that loops once. See
926L<perlfunc/last>.
4633a7c4 927
2c7d6b9c
RGS
928=item Can't linearize anonymous symbol table
929
930(F) Perl tried to calculate the method resolution order (MRO) of a
931package, but failed because the package stash has no name.
932
b8170e59
JB
933=item Can't load '%s' for module %s
934
6903afa2
FC
935(F) The module you tried to load failed to load a dynamic extension.
936This may either mean that you upgraded your version of perl to one
937that is incompatible with your old dynamic extensions (which is known
938to happen between major versions of perl), or (more likely) that your
939dynamic extension was built against an older version of the library
940that is installed on your system. You may need to rebuild your old
941dynamic extensions.
b8170e59 942
748a9306
LW
943=item Can't localize lexical variable %s
944
2ba9eb46 945(F) You used local on a variable name that was previously declared as a
b7e4ecc1
FC
946lexical variable using "my" or "state". This is not allowed. If you
947want to localize a package variable of the same name, qualify it with
948the package name.
748a9306 949
6df41af2 950=item Can't localize through a reference
4727527e 951
6df41af2
GS
952(F) You said something like C<local $$ref>, which Perl can't currently
953handle, because when it goes to restore the old value of whatever $ref
be771a83 954pointed to after the scope of the local() is finished, it can't be sure
64977eb6 955that $ref will still be a reference.
4727527e 956
ea071790 957=item Can't locate %s
ec889f3a 958
fa816bf3
FC
959(F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be found.
960Perl looks for the file in all the locations mentioned in @INC, unless
961the file name included the full path to the file. Perhaps you need
962to set the PERL5LIB or PERL5OPT environment variable to say where the
963extra library is, or maybe the script needs to add the library name
be771a83
GS
964to @INC. Or maybe you just misspelled the name of the file. See
965L<perlfunc/require> and L<lib>.
a0d0e21e 966
6df41af2
GS
967=item Can't locate auto/%s.al in @INC
968
be771a83
GS
969(F) A function (or method) was called in a package which allows
970autoload, but there is no function to autoload. Most probable causes
971are a misprint in a function/method name or a failure to C<AutoSplit>
972the file, say, by doing C<make install>.
6df41af2 973
b8170e59
JB
974=item Can't locate loadable object for module %s in @INC
975
976(F) The module you loaded is trying to load an external library, like
d70d8e57 977for example, F<foo.so> or F<bar.dll>, but the L<DynaLoader> module was
b8170e59
JB
978unable to locate this library. See L<DynaLoader>.
979
a0d0e21e
LW
980=item Can't locate object method "%s" via package "%s"
981
982(F) You called a method correctly, and it correctly indicated a package
983functioning as a class, but that package doesn't define that particular
2ba9eb46 984method, nor does any of its base classes. See L<perlobj>.
a0d0e21e
LW
985
986=item Can't locate package %s for @%s::ISA
987
be771a83
GS
988(W syntax) The @ISA array contained the name of another package that
989doesn't seem to exist.
a0d0e21e 990
2f7da168
RK
991=item Can't locate PerlIO%s
992
993(F) You tried to use in open() a PerlIO layer that does not exist,
994e.g. open(FH, ">:nosuchlayer", "somefile").
995
f4ad53f4 996=item Can't make list assignment to %ENV on this system
3e3baf6d 997
be771a83
GS
998(F) List assignment to %ENV is not supported on some systems, notably
999VMS.
3e3baf6d 1000
cd40cd58
NC
1001=item Can't make loaded symbols global on this platform while loading %s
1002
1003(W) A module passed the flag 0x01 to DynaLoader::dl_load_file() to request
1004that symbols from the stated file are made available globally within the
1005process, but that functionality is not available on this platform. Whilst
1006the module likely will still work, this may prevent the perl interpreter
1007from loading other XS-based extensions which need to link directly to
1008functions defined in the C or XS code in the stated file.
1009
a0d0e21e
LW
1010=item Can't modify %s in %s
1011
be771a83
GS
1012(F) You aren't allowed to assign to the item indicated, or otherwise try
1013to change it, such as with an auto-increment.
a0d0e21e 1014
54310121 1015=item Can't modify nonexistent substring
a0d0e21e
LW
1016
1017(P) The internal routine that does assignment to a substr() was handed
1018a NULL.
1019
6df41af2
GS
1020=item Can't modify non-lvalue subroutine call
1021
1022(F) Subroutines meant to be used in lvalue context should be declared as
2fe2bdfd 1023such. See L<perlsub/"Lvalue subroutines">.
6df41af2 1024
5f05dabc 1025=item Can't msgrcv to read-only var
a0d0e21e 1026
5f05dabc 1027(F) The target of a msgrcv must be modifiable to be used as a receive
a0d0e21e
LW
1028buffer.
1029
6df41af2
GS
1030=item Can't "next" outside a loop block
1031
1032(F) A "next" statement was executed to reiterate the current block, but
1033there isn't a current block. Note that an "if" or "else" block doesn't
be771a83
GS
1034count as a "loopish" block, as doesn't a block given to sort(), map() or
1035grep(). You can usually double the curlies to get the same effect
1036though, because the inner curlies will be considered a block that loops
1037once. See L<perlfunc/next>.
6df41af2 1038
46fa9b26
FC
1039=item Can't open %s
1040
1041(F) You tried to run a perl built with MAD support with
1042the PERL_XMLDUMP environment variable set, but the file
1043named by that variable could not be opened.
1044
a0d0e21e
LW
1045=item Can't open %s: %s
1046
c47ff5f1 1047(S inplace) The implicit opening of a file through use of the C<< <> >>
08e9d68e 1048filehandle, either implicitly under the C<-n> or C<-p> command-line
46fa9b26
FC
1049switches, or explicitly, failed for the indicated reason. Usually
1050this is because you don't have read permission for a file which
1051you named on the command line.
1052
1053(F) You tried to call perl with the B<-e> switch, but F</dev/null> (or
1054your operating system's equivalent) could not be opened.
a0d0e21e 1055
9a869a14
RGS
1056=item Can't open a reference
1057
1058(W io) You tried to open a scalar reference for reading or writing,
2fe2bdfd 1059using the 3-arg open() syntax:
9a869a14
RGS
1060
1061 open FH, '>', $ref;
1062
1063but your version of perl is compiled without perlio, and this form of
1064open is not supported.
1065
a0d0e21e
LW
1066=item Can't open bidirectional pipe
1067
be771a83
GS
1068(W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported.
1069You can try any of several modules in the Perl library to do this, such
1070as IPC::Open2. Alternately, direct the pipe's output to a file using
1071">", and then read it in under a different file handle.
a0d0e21e 1072
748a9306
LW
1073=item Can't open error file %s as stderr
1074
be771a83
GS
1075(F) An error peculiar to VMS. Perl does its own command line
1076redirection, and couldn't open the file specified after '2>' or '2>>' on
1077the command line for writing.
748a9306
LW
1078
1079=item Can't open input file %s as stdin
1080
be771a83
GS
1081(F) An error peculiar to VMS. Perl does its own command line
1082redirection, and couldn't open the file specified after '<' on the
1083command line for reading.
748a9306
LW
1084
1085=item Can't open output file %s as stdout
1086
be771a83
GS
1087(F) An error peculiar to VMS. Perl does its own command line
1088redirection, and couldn't open the file specified after '>' or '>>' on
1089the command line for writing.
748a9306
LW
1090
1091=item Can't open output pipe (name: %s)
1092
be771a83
GS
1093(P) An error peculiar to VMS. Perl does its own command line
1094redirection, and couldn't open the pipe into which to send data destined
1095for stdout.
748a9306 1096
3b1cf97d 1097=item Can't open perl script "%s": %s
a0d0e21e
LW
1098
1099(F) The script you specified can't be opened for the indicated reason.
1100
fa3aa65a
JC
1101If you're debugging a script that uses #!, and normally relies on the
1102shell's $PATH search, the -S option causes perl to do that search, so
1103you don't have to type the path or C<`which $scriptname`>.
1104
6df41af2
GS
1105=item Can't read CRTL environ
1106
1107(S) A warning peculiar to VMS. Perl tried to read an element of %ENV
1108from the CRTL's internal environment array and discovered the array was
1109missing. You need to figure out where your CRTL misplaced its environ
be771a83
GS
1110or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not
1111searched.
6df41af2 1112
6df41af2
GS
1113=item Can't "redo" outside a loop block
1114
1115(F) A "redo" statement was executed to restart the current block, but
1116there isn't a current block. Note that an "if" or "else" block doesn't
1117count as a "loopish" block, as doesn't a block given to sort(), map()
1118or grep(). You can usually double the curlies to get the same effect
1119though, because the inner curlies will be considered a block that
1120loops once. See L<perlfunc/redo>.
1121
64977eb6 1122=item Can't remove %s: %s, skipping file
10f9c03d 1123
be771a83
GS
1124(S inplace) You requested an inplace edit without creating a backup
1125file. Perl was unable to remove the original file to replace it with
1126the modified file. The file was left unmodified.
10f9c03d 1127
a0d0e21e
LW
1128=item Can't rename %s to %s: %s, skipping file
1129
e476b1b5 1130(S inplace) The rename done by the B<-i> switch failed for some reason,
10f9c03d 1131probably because you don't have write permission to the directory.
a0d0e21e 1132
748a9306
LW
1133=item Can't reopen input pipe (name: %s) in binary mode
1134
be771a83
GS
1135(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried
1136to reopen it to accept binary data. Alas, it failed.
748a9306 1137
4f12ec0e
FC
1138=item Can't reset %ENV on this system
1139
1140(F) You called C<reset('E')> or similar, which tried to reset
1141all variables in the current package beginning with "E". In
1142the main package, that includes %ENV. Resetting %ENV is not
1143supported on some systems, notably VMS.
1144
fe13d51d 1145=item Can't resolve method "%s" overloading "%s" in package "%s"
6df41af2 1146
1fa582fa
FC
1147(F)(P) Error resolving overloading specified by a method name (as
1148opposed to a subroutine reference): no such method callable via the
1149package. If the method name is C<???>, this is an internal error.
6df41af2 1150
cd06dffe
GS
1151=item Can't return %s from lvalue subroutine
1152
be771a83
GS
1153(F) Perl detected an attempt to return illegal lvalues (such as
1154temporary or readonly values) from a subroutine used as an lvalue. This
1155is not allowed.
cd06dffe 1156
96ebfdd7
RK
1157=item Can't return outside a subroutine
1158
1159(F) The return statement was executed in mainline code, that is, where
1160there was no subroutine call to return out of. See L<perlsub>.
1161
78f9721b
SM
1162=item Can't return %s to lvalue scalar context
1163
6903afa2
FC
1164(F) You tried to return a complete array or hash from an lvalue
1165subroutine, but you called the subroutine in a way that made Perl
1166think you meant to return only one value. You probably meant to
1167write parentheses around the call to the subroutine, which tell
1168Perl that the call should be in list context.
78f9721b 1169
a0d0e21e
LW
1170=item Can't stat script "%s"
1171
be771a83
GS
1172(P) For some reason you can't fstat() the script even though you have it
1173open already. Bizarre.
a0d0e21e 1174
a0d0e21e
LW
1175=item Can't take log of %g
1176
fb73857a 1177(F) For ordinary real numbers, you can't take the logarithm of a
6903afa2 1178negative number or zero. There's a Math::Complex package that comes
be771a83
GS
1179standard with Perl, though, if you really want to do that for the
1180negative numbers.
a0d0e21e
LW
1181
1182=item Can't take sqrt of %g
1183
1184(F) For ordinary real numbers, you can't take the square root of a
fb73857a
PP
1185negative number. There's a Math::Complex package that comes standard
1186with Perl, though, if you really want to do that.
a0d0e21e
LW
1187
1188=item Can't undef active subroutine
1189
1190(F) You can't undefine a routine that's currently running. You can,
1191however, redefine it while it's running, and you can even undef the
1192redefined subroutine while the old routine is running. Go figure.
1193
c81225bc 1194=item Can't upgrade %s (%d) to %d
a0d0e21e 1195
be771a83
GS
1196(P) The internal sv_upgrade routine adds "members" to an SV, making it
1197into a more specialized kind of SV. The top several SV types are so
1198specialized, however, that they cannot be interconverted. This message
1199indicates that such a conversion was attempted.
a0d0e21e 1200
6651ba0b
FC
1201=item Can't use '%c' after -mname
1202
1203(F) You tried to call perl with the B<-m> switch, but you put something
1204other than "=" after the module name.
1205
1db89ea5
BS
1206=item Can't use anonymous symbol table for method lookup
1207
e27ad1f2 1208(F) The internal routine that does method lookup was handed a symbol
1db89ea5
BS
1209table that doesn't have a name. Symbol tables can become anonymous
1210for example by undefining stashes: C<undef %Some::Package::>.
1211
96ebfdd7
RK
1212=item Can't use an undefined value as %s reference
1213
1214(F) A value used as either a hard reference or a symbolic reference must
1215be a defined value. This helps to delurk some insidious errors.
1216
6df41af2
GS
1217=item Can't use bareword ("%s") as %s ref while "strict refs" in use
1218
be771a83
GS
1219(F) Only hard references are allowed by "strict refs". Symbolic
1220references are disallowed. See L<perlref>.
6df41af2 1221
90b75b61 1222=item Can't use %! because Errno.pm is not available
1d2dff63 1223
20561843 1224(F) The first time the C<%!> hash is used, perl automatically loads the
6903afa2 1225Errno.pm module. The Errno module is expected to tie the %! hash to
1d2dff63
GS
1226provide symbolic names for C<$!> errno values.
1227
1109a392
MHM
1228=item Can't use both '<' and '>' after type '%c' in %s
1229
1230(F) A type cannot be forced to have both big-endian and little-endian
1231byte-order at the same time, so this combination of modifiers is not
1232allowed. See L<perlfunc/pack>.
1233
6df41af2
GS
1234=item Can't use %s for loop variable
1235
be771a83
GS
1236(F) Only a simple scalar variable may be used as a loop variable on a
1237foreach.
6df41af2 1238
aab6a793 1239=item Can't use global %s in "%s"
6df41af2 1240
be771a83
GS
1241(F) You tried to declare a magical variable as a lexical variable. This
1242is not allowed, because the magic can be tied to only one location
1243(namely the global variable) and it would be incredibly confusing to
1244have variables in your program that looked like magical variables but
6df41af2
GS
1245weren't.
1246
6d3b25aa
RGS
1247=item Can't use '%c' in a group with different byte-order in %s
1248
1249(F) You attempted to force a different byte-order on a type
1250that is already inside a group with a byte-order modifier.
1251For example you cannot force little-endianness on a type that
1252is inside a big-endian group.
1253
c07a80fd
PP
1254=item Can't use "my %s" in sort comparison
1255
1256(F) The global variables $a and $b are reserved for sort comparisons.
c47ff5f1 1257You mentioned $a or $b in the same line as the <=> or cmp operator,
c07a80fd
PP
1258and the variable had earlier been declared as a lexical variable.
1259Either qualify the sort variable with the package name, or rename the
1260lexical variable.
1261
a0d0e21e
LW
1262=item Can't use %s ref as %s ref
1263
1264(F) You've mixed up your reference types. You have to dereference a
1265reference of the type needed. You can use the ref() function to
1266test the type of the reference, if need be.
1267
748a9306 1268=item Can't use string ("%s") as %s ref while "strict refs" in use
a0d0e21e 1269
b41bf23f
FC
1270(F) You've told Perl to dereference a string, something which
1271C<use strict> blocks to prevent it happening accidentally. See
1272L<perlref/"Symbolic references">. This can be triggered by an C<@> or C<$>
1273in a double-quoted string immediately before interpolating a variable,
1274for example in C<"user @$twitter_id">, which says to treat the contents
1275of C<$twitter_id> as an array reference; use a C<\> to have a literal C<@>
1276symbol followed by the contents of C<$twitter_id>: C<"user \@$twitter_id">.
a0d0e21e 1277
748a9306
LW
1278=item Can't use subscript on %s
1279
1280(F) The compiler tried to interpret a bracketed expression as a
1281subscript. But to the left of the brackets was an expression that
209e7cf1 1282didn't look like a hash or array reference, or anything else subscriptable.
748a9306 1283
6df41af2
GS
1284=item Can't use \%c to mean $%c in expression
1285
75b44862
GS
1286(W syntax) In an ordinary expression, backslash is a unary operator that
1287creates a reference to its argument. The use of backslash to indicate a
1288backreference to a matched substring is valid only as part of a regular
be771a83
GS
1289expression pattern. Trying to do this in ordinary Perl code produces a
1290value that prints out looking like SCALAR(0xdecaf). Use the $1 form
1291instead.
6df41af2 1292
810b8aa5
GS
1293=item Can't weaken a nonreference
1294
1295(F) You attempted to weaken something that was not a reference. Only
1296references can be weakened.
1297
fc7debfb
FC
1298=item Can't "when" outside a topicalizer
1299
1300(F) You have used a when() block that is neither inside a C<foreach>
1301loop nor a C<given> block. (Note that this error is issued on exit
1302from the C<when> block, so you won't get the error if the match fails,
1303or if you use an explicit C<continue>.)
1304
5f05dabc 1305=item Can't x= to read-only value
a0d0e21e 1306
be771a83
GS
1307(F) You tried to repeat a constant value (often the undefined value)
1308with an assignment operator, which implies modifying the value itself.
a0d0e21e
LW
1309Perhaps you need to copy the value to a temporary, and repeat that.
1310
4a68bf9d 1311=item Character following "\c" must be ASCII
f9d13529 1312
1fa582fa 1313(F)(W deprecated, syntax) In C<\cI<X>>, I<X> must be an ASCII character.
675fa9ff
FC
1314It is planned to make this fatal in all instances in Perl v5.20. In
1315the cases where it isn't fatal, the character this evaluates to is
17a3df4c
KW
1316derived by exclusive or'ing the code point of this character with 0x40.
1317
c9faaf04
KW
1318Note that non-alphabetic ASCII characters are discouraged here as well,
1319and using non-printable ones will be deprecated starting in v5.18.
f9d13529 1320
f337b084 1321=item Character in 'C' format wrapped in pack
ac7cd81a
SC
1322
1323(W pack) You said
1324
1325 pack("C", $x)
1326
1327where $x is either less than 0 or more than 255; the C<"C"> format is
1328only for encoding native operating system characters (ASCII, EBCDIC,
1329and so on) and not for Unicode characters, so Perl behaved as if you meant
1330
1331 pack("C", $x & 255)
1332
1333If you actually want to pack Unicode codepoints, use the C<"U"> format
1334instead.
1335
f337b084 1336=item Character in 'c' format wrapped in pack
ac7cd81a
SC
1337
1338(W pack) You said
1339
1340 pack("c", $x)
1341
1342where $x is either less than -128 or more than 127; the C<"c"> format
1343is only for encoding native operating system characters (ASCII, EBCDIC,
1344and so on) and not for Unicode characters, so Perl behaved as if you meant
1345
1346 pack("c", $x & 255);
1347
1348If you actually want to pack Unicode codepoints, use the C<"U"> format
1349instead.
1350
f337b084
TH
1351=item Character in '%c' format wrapped in unpack
1352
1353(W unpack) You tried something like
1354
1355 unpack("H", "\x{2a1}")
1356
1a147d38 1357where the format expects to process a byte (a character with a value
6903afa2
FC
1358below 256), but a higher value was provided instead. Perl uses the
1359value modulus 256 instead, as if you had provided:
f337b084
TH
1360
1361 unpack("H", "\x{a1}")
1362
5a25739d
FC
1363=item Character in 'W' format wrapped in pack
1364
1365(W pack) You said
1366
1367 pack("U0W", $x)
1368
1369where $x is either less than 0 or more than 255. However, C<U0>-mode
1370expects all values to fall in the interval [0, 255], so Perl behaved
1371as if you meant:
1372
1373 pack("U0W", $x & 255)
1374
f337b084
TH
1375=item Character(s) in '%c' format wrapped in pack
1376
1377(W pack) You tried something like
1378
1379 pack("u", "\x{1f3}b")
1380
1a147d38 1381where the format expects to process a sequence of bytes (character with a
6903afa2 1382value below 256), but some of the characters had a higher value. Perl
f337b084
TH
1383uses the character values modulus 256 instead, as if you had provided:
1384
1385 pack("u", "\x{f3}b")
1386
1387=item Character(s) in '%c' format wrapped in unpack
1388
1389(W unpack) You tried something like
1390
1391 unpack("s", "\x{1f3}b")
1392
1a147d38 1393where the format expects to process a sequence of bytes (character with a
6903afa2 1394value below 256), but some of the characters had a higher value. Perl
f337b084
TH
1395uses the character values modulus 256 instead, as if you had provided:
1396
1397 unpack("s", "\x{f3}b")
1398
f866a7cd
FC
1399=item "\c{" is deprecated and is more clearly written as ";"
1400
1401(D deprecated, syntax) The C<\cI<X>> construct is intended to be a way
1402to specify non-printable characters. You used it with a "{" which
1403evaluates to ";", which is printable. It is planned to remove the
c9faaf04 1404ability to specify a semi-colon this way in Perl 5.20. Just use a
f866a7cd
FC
1405semi-colon or a backslash-semi-colon without the "\c".
1406
1407=item "\c%c" is more clearly written simply as "%s"
1408
1409(W syntax) The C<\cI<X>> construct is intended to be a way to specify
1410non-printable characters. You used it for a printable one, which is better
1411written as simply itself, perhaps preceded by a backslash for non-word
1412characters.
1413
6651ba0b
FC
1414=item Cloning substitution context is unimplemented
1415
1416(F) Creating a new thread inside the C<s///> operator is not supported.
1417
abc7ecad
SP
1418=item closedir() attempted on invalid dirhandle %s
1419
1420(W io) The dirhandle you tried to close is either closed or not really
1421a dirhandle. Check your control flow.
1422
5a25739d
FC
1423=item close() on unopened filehandle %s
1424
1425(W unopened) You tried to close a filehandle that was never opened.
1426
541ed3a9
FC
1427=item Closure prototype called
1428
1429(F) If a closure has attributes, the subroutine passed to an attribute
1430handler is the prototype that is cloned when a new closure is created.
1431This subroutine cannot be called.
1432
49704364
LW
1433=item Code missing after '/'
1434
6903afa2
FC
1435(F) You had a (sub-)template that ends with a '/'. There must be
1436another template code following the slash. See L<perlfunc/pack>.
49704364 1437
6fbc9859
MH
1438=item Code point 0x%X is not Unicode, all \p{} matches fail; all \P{} matches
1439succeed
9ae3ac1a 1440
5a25739d
FC
1441=item Code point 0x%X is not Unicode, may not be portable
1442
e2f4a215 1443(S utf8, non_unicode) You had a code point above the Unicode maximum
1b64326b
FC
1444of U+10FFFF.
1445
1446Perl allows strings to contain a superset of Unicode code points, up
1447to the limit of what is storable in an unsigned integer on your system,
1448but these may not be accepted by other languages/systems. At one time,
1449it was legal in some standards to have code points up to 0x7FFF_FFFF,
1450but not higher. Code points above 0xFFFF_FFFF require larger than a
145132 bit word.
0876b9a0 1452
9ae3ac1a
KW
1453None of the Unicode or Perl-defined properties will match a non-Unicode
1454code point. For example,
1455
1456 chr(0x7FF_FFFF) =~ /\p{Any}/
1457
1458will not match, because the code point is not in Unicode. But
1459
1460 chr(0x7FF_FFFF) =~ /\P{Any}/
1461
1462will match.
1463
94b42e47
KW
1464This may be counterintuitive at times, as both these fail:
1465
f9d4ccdc
FC
1466 chr(0x110000) =~ /\p{ASCII_Hex_Digit=True}/ # Fails.
1467 chr(0x110000) =~ /\p{ASCII_Hex_Digit=False}/ # Also fails!
94b42e47
KW
1468
1469and both these succeed:
1470
f9d4ccdc
FC
1471 chr(0x110000) =~ /\P{ASCII_Hex_Digit=True}/ # Succeeds.
1472 chr(0x110000) =~ /\P{ASCII_Hex_Digit=False}/ # Also succeeds!
94b42e47 1473
6df41af2
GS
1474=item %s: Command not found
1475
a892b81a
FC
1476(A) You've accidentally run your script through B<csh> or another shell
1477shell instead of Perl. Check the #! line, or manually feed your script
1478into Perl yourself. The #! line at the top of your file could look like
8f721816
MM
1479
1480 #!/usr/bin/perl -w
6df41af2 1481
7a2e2cd6
PP
1482=item Compilation failed in require
1483
1484(F) Perl could not compile a file specified in a C<require> statement.
be771a83
GS
1485Perl uses this generic message when none of the errors that it
1486encountered were severe enough to halt compilation immediately.
7a2e2cd6 1487
c3464db5
DD
1488=item Complex regular subexpression recursion limit (%d) exceeded
1489
be771a83
GS
1490(W regexp) The regular expression engine uses recursion in complex
1491situations where back-tracking is required. Recursion depth is limited
1492to 32766, or perhaps less in architectures where the stack cannot grow
1493arbitrarily. ("Simple" and "medium" situations are handled without
1494recursion and are not subject to a limit.) Try shortening the string
1495under examination; looping in Perl code (e.g. with C<while>) rather than
1496in the regular expression engine; or rewriting the regular expression so
c2e66d9e 1497that it is simpler or backtracks less. (See L<perlfaq2> for information
be771a83 1498on I<Mastering Regular Expressions>.)
c3464db5 1499
38875929
DM
1500=item cond_broadcast() called on unlocked variable
1501
6903afa2
FC
1502(W threads) Within a thread-enabled program, you tried to
1503call cond_broadcast() on a variable which wasn't locked.
1504The cond_broadcast() function is used to wake up another thread
1505that is waiting in a cond_wait(). To ensure that the signal isn't
1506sent before the other thread has a chance to enter the wait, it
1507is usual for the signaling thread first to wait for a lock on
1508variable. This lock attempt will only succeed after the other
1509thread has entered cond_wait() and thus relinquished the lock.
38875929 1510
38875929
DM
1511=item cond_signal() called on unlocked variable
1512
6903afa2
FC
1513(W threads) Within a thread-enabled program, you tried to
1514call cond_signal() on a variable which wasn't locked. The
1515cond_signal() function is used to wake up another thread that
1516is waiting in a cond_wait(). To ensure that the signal isn't
1517sent before the other thread has a chance to enter the wait, it
1518is usual for the signaling thread first to wait for a lock on
1519variable. This lock attempt will only succeed after the other
1520thread has entered cond_wait() and thus relinquished the lock.
38875929 1521
69282e91 1522=item connect() on closed socket %s
a0d0e21e 1523
be771a83
GS
1524(W closed) You tried to do a connect on a closed socket. Did you forget
1525to check the return value of your socket() call? See
1526L<perlfunc/connect>.
a0d0e21e 1527
e21e7c6a
FC
1528=item Constant(%s): Call to &{$^H{%s}} did not return a defined value
1529
1530(F) The subroutine registered to handle constant overloading
1531(see L<overload>) or a custom charnames handler (see
1532L<charnames/CUSTOM TRANSLATORS>) returned an undefined value.
1533
1534=item Constant(%s): $^H{%s} is not defined
1535
1536(F) The parser found inconsistencies while attempting to define an
1537overloaded constant. Perhaps you forgot to load the corresponding
1538L<overload> pragma?.
1539
779c5bc9
GS
1540=item Constant is not %s reference
1541
1542(F) A constant value (perhaps declared using the C<use constant> pragma)
be771a83 1543is being dereferenced, but it amounts to the wrong type of reference.
6903afa2 1544The message indicates the type of reference that was expected. This
be771a83 1545usually indicates a syntax error in dereferencing the constant value.
779c5bc9
GS
1546See L<perlsub/"Constant Functions"> and L<constant>.
1547
4cee8e80
CS
1548=item Constant subroutine %s redefined
1549
aeb94125
FC
1550(W redefine)(S) You redefined a subroutine which had previously
1551been eligible for inlining. See L<perlsub/"Constant Functions">
1552for commentary and workarounds.
4cee8e80 1553
9607fc9c
PP
1554=item Constant subroutine %s undefined
1555
be771a83
GS
1556(W misc) You undefined a subroutine which had previously been eligible
1557for inlining. See L<perlsub/"Constant Functions"> for commentary and
1558workarounds.
9607fc9c 1559
5a25739d
FC
1560=item Constant(%s) unknown
1561
1562(F) The parser found inconsistencies either while attempting
1563to define an overloaded constant, or when trying to find the
1564character name specified in the C<\N{...}> escape. Perhaps you
1565forgot to load the corresponding L<overload> pragma?.
1566
e7ea3e70
IZ
1567=item Copy method did not return a reference
1568
6903afa2 1569(F) The method which overloads "=" is buggy. See
13a2d996 1570L<overload/Copy Constructor>.
e7ea3e70 1571
4aaa4757
FC
1572=item &CORE::%s cannot be called directly
1573
1574(F) You tried to call a subroutine in the C<CORE::> namespace
8d605c0d 1575with C<&foo> syntax or through a reference. Some subroutines
4aaa4757
FC
1576in this package cannot yet be called that way, but must be
1577called as barewords. Something like this will work:
1578
1579 BEGIN { *shove = \&CORE::push; }
1580 shove @array, 1,2,3; # pushes on to @array
1581
6798c92b
GS
1582=item CORE::%s is not a keyword
1583
1584(F) The CORE:: namespace is reserved for Perl keywords.
1585
675fa9ff
FC
1586=item Corrupted regexp opcode %d > %d
1587
1588(P) This is either an error in Perl, or, if you're using
1589one, your L<custom regular expression engine|perlreapi>. If not the
1590latter, report the problem through the L<perlbug> utility.
1591
a0d0e21e
LW
1592=item corrupted regexp pointers
1593
1594(P) The regular expression engine got confused by what the regular
1595expression compiler gave it.
1596
1597=item corrupted regexp program
1598
be771a83
GS
1599(P) The regular expression engine got passed a regexp program without a
1600valid magic number.
a0d0e21e 1601
de42a5a9 1602=item Corrupt malloc ptr 0x%x at 0x%x
6df41af2
GS
1603
1604(P) The malloc package that comes with Perl had an internal failure.
1605
49704364
LW
1606=item Count after length/code in unpack
1607
1608(F) You had an unpack template indicating a counted-length string, but
1609you have also specified an explicit size for the string. See
1610L<perlfunc/pack>.
1611
6651ba0b
FC
1612=item Deep recursion on anonymous subroutine
1613
a0d0e21e
LW
1614=item Deep recursion on subroutine "%s"
1615
be771a83
GS
1616(W recursion) This subroutine has called itself (directly or indirectly)
1617100 times more than it has returned. This probably indicates an
1618infinite recursion, unless you're writing strange benchmark programs, in
1619which case it indicates something else.
a0d0e21e 1620
aad1d01f
NC
1621This threshold can be changed from 100, by recompiling the F<perl> binary,
1622setting the C pre-processor macro C<PERL_SUB_DEPTH_WARN> to the desired value.
1623
f10b0346 1624=item defined(@array) is deprecated
69794302 1625
be771a83
GS
1626(D deprecated) defined() is not usually useful on arrays because it
1627checks for an undefined I<scalar> value. If you want to see if the
64977eb6 1628array is empty, just use C<if (@array) { # not empty }> for example.
69794302 1629
f10b0346 1630=item defined(%hash) is deprecated
69794302 1631
f0ec9725
KR
1632(D deprecated) C<defined()> is not usually right on hashes and has been
1633discouraged since 5.004.
1634
1635Although C<defined %hash> is false on a plain not-yet-used hash, it
1636becomes true in several non-obvious circumstances, including iterators,
1637weak references, stash names, even remaining true after C<undef %hash>.
1638These things make C<defined %hash> fairly useless in practice.
1639
1640If a check for non-empty is what you wanted then just put it in boolean
1641context (see L<perldata/Scalar values>):
16546e45
KR
1642
1643 if (%hash) {
1644 # not empty
1645 }
1646
f0ec9725
KR
1647If you had C<defined %Foo::Bar::QUUX> to check whether such a package
1648variable exists then that's never really been reliable, and isn't
1649a good way to enquire about the features of a package, or whether
1650it's loaded, etc.
1651
69794302 1652
6fbc9859
MH
1653=item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in
1654m/%s/
bcb95744 1655
6903afa2 1656(F) You used something like C<(?(DEFINE)...|..)> which is illegal. The
bcb95744
FC
1657most likely cause of this error is that you left out a parenthesis inside
1658of the C<....> part.
1659
9e3ec65c 1660The <-- HERE shows whereabouts in the regular expression the problem was
bcb95744
FC
1661discovered.
1662
62658f4d
PM
1663=item %s defines neither package nor VERSION--version check failed
1664
1665(F) You said something like "use Module 42" but in the Module file
1666there are neither package declarations nor a C<$VERSION>.
1667
fc36a67e
PP
1668=item Delimiter for here document is too long
1669
be771a83
GS
1670(F) In a here document construct like C<<<FOO>, the label C<FOO> is too
1671long for Perl to handle. You have to be seriously twisted to write code
1672that triggers this error.
fc36a67e 1673
6d3b25aa
RGS
1674=item Deprecated use of my() in false conditional
1675
fa816bf3
FC
1676(D deprecated) You used a declaration similar to C<my $x if 0>. There
1677has been a long-standing bug in Perl that causes a lexical variable
6d3b25aa 1678not to be cleared at scope exit when its declaration includes a false
6903afa2 1679conditional. Some people have exploited this bug to achieve a kind of
fa816bf3 1680static variable. Since we intend to fix this bug, we don't want people
6903afa2 1681relying on this behavior. You can achieve a similar static effect by
6d3b25aa 1682declaring the variable in a separate block outside the function, eg
36fb85f3 1683
6d3b25aa
RGS
1684 sub f { my $x if 0; return $x++ }
1685
1686becomes
1687
1688 { my $x; sub f { return $x++ } }
1689
fa816bf3
FC
1690Beginning with perl 5.9.4, you can also use C<state> variables to have
1691lexicals that are initialized only once (see L<feature>):
36fb85f3
RGS
1692
1693 sub f { state $x; return $x++ }
1694
500ab966
RGS
1695=item DESTROY created new reference to dead object '%s'
1696
1697(F) A DESTROY() method created a new reference to the object which is
6903afa2
FC
1698just being DESTROYed. Perl is confused, and prefers to abort rather
1699than to create a dangling reference.
500ab966 1700
3cdd684c
TP
1701=item Did not produce a valid header
1702
1703See Server error.
1704
6df41af2
GS
1705=item %s did not return a true value
1706
1707(F) A required (or used) file must return a true value to indicate that
1708it compiled correctly and ran its initialization code correctly. It's
1709traditional to end such a file with a "1;", though any true value would
1710do. See L<perlfunc/require>.
1711
cc507455 1712=item (Did you mean &%s instead?)
4633a7c4 1713
413ff9f6
FC
1714(W misc) You probably referred to an imported subroutine &FOO as $FOO or
1715some such.
4633a7c4 1716
cc507455 1717=item (Did you mean "local" instead of "our"?)
33633739 1718
be771a83
GS
1719(W misc) Remember that "our" does not localize the declared global
1720variable. You have declared it again in the same lexical scope, which
1721seems superfluous.
33633739 1722
cc507455 1723=item (Did you mean $ or @ instead of %?)
a0d0e21e 1724
be771a83
GS
1725(W) You probably said %hash{$key} when you meant $hash{$key} or
1726@hash{@keys}. On the other hand, maybe you just meant %hash and got
1727carried away.
748a9306 1728
7e1af8bc 1729=item Died
5f05dabc
PP
1730
1731(F) You passed die() an empty string (the equivalent of C<die "">) or
075b00aa 1732you called it with no args and C<$@> was empty.
5f05dabc 1733
3cdd684c
TP
1734=item Document contains no data
1735
1736See Server error.
1737
62658f4d
PM
1738=item %s does not define %s::VERSION--version check failed
1739
1740(F) You said something like "use Module 42" but the Module did not
943fc58e 1741define a C<$VERSION>.
62658f4d 1742
49704364
LW
1743=item '/' does not take a repeat count
1744
1745(F) You cannot put a repeat count of any kind right after the '/' code.
1746See L<perlfunc/pack>.
1747
a0d0e21e
LW
1748=item Don't know how to handle magic of type '%s'
1749
1750(P) The internal handling of magical variables has been cursed.
1751
1752=item do_study: out of memory
1753
1754(P) This should have been caught by safemalloc() instead.
1755
6df41af2
GS
1756=item (Do you need to predeclare %s?)
1757
56da5a46
RGS
1758(S syntax) This is an educated guess made in conjunction with the message
1759"%s found where operator expected". It often means a subroutine or module
6df41af2
GS
1760name is being referenced that hasn't been declared yet. This may be
1761because of ordering problems in your file, or because of a missing
be771a83
GS
1762"sub", "package", "require", or "use" statement. If you're referencing
1763something that isn't defined yet, you don't actually have to define the
1764subroutine or package before the current location. You can use an empty
1765"sub foo;" or "package FOO;" to enter a "forward" declaration.
6df41af2 1766
ac206dc8
RGS
1767=item dump() better written as CORE::dump()
1768
1769(W misc) You used the obsolescent C<dump()> built-in function, without fully
1770qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>.
1771
84d78eb7
YO
1772=item dump is not supported
1773
1774(F) Your machine doesn't support dump/undump.
1775
a0d0e21e
LW
1776=item Duplicate free() ignored
1777
be771a83
GS
1778(S malloc) An internal routine called free() on something that had
1779already been freed.
a0d0e21e 1780
1109a392
MHM
1781=item Duplicate modifier '%c' after '%c' in %s
1782
35f0cd76
FC
1783(W unpack) You have applied the same modifier more than once after a
1784type in a pack template. See L<perlfunc/pack>.
1109a392 1785
4633a7c4
LW
1786=item elseif should be elsif
1787
fa816bf3
FC
1788(S syntax) There is no keyword "elseif" in Perl because Larry thinks
1789it's ugly. Your code will be interpreted as an attempt to call a method
1790named "elseif" for the class returned by the following block. This is
4633a7c4
LW
1791unlikely to be what you want.
1792
c608e803 1793=item Empty \%c{} in regex; marked by <-- HERE in m/%s/
ab13f0c7 1794
af6f566e 1795(F) C<\p> and C<\P> are used to introduce a named Unicode property, as
6903afa2 1796described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in
af6f566e 1797a regular expression without specifying the property name.
ab13f0c7 1798
85ab1d1d 1799=item entering effective %s failed
5ff3f7a4 1800
85ab1d1d 1801(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1802effective uids or gids failed.
1803
c038024b
RGS
1804=item %ENV is aliased to %s
1805
1806(F) You're running under taint mode, and the C<%ENV> variable has been
1807aliased to another hash, so it doesn't reflect anymore the state of the
6903afa2 1808program's environment. This is potentially insecure.
c038024b 1809
748a9306
LW
1810=item Error converting file specification %s
1811
5f05dabc 1812(F) An error peculiar to VMS. Because Perl may have to deal with file
748a9306 1813specifications in either VMS or Unix syntax, it converts them to a
be771a83
GS
1814single form when it must operate on them directly. Either you've passed
1815an invalid file specification to Perl, or you've found a case the
1816conversion routines don't handle. Drat.
748a9306 1817
ff56e4f1
KW
1818=item Escape literal pattern white space under /x
1819
1820(D deprecated) You compiled a regular expression pattern with C</x> to
1821ignore white space, and you used, as a literal, one of the characters
1822that Perl plans to eventually treat as white space. The character must
1823be escaped somehow, or it will work differently on a future Perl that
1824does treat it as white space. The easiest way is to insert a backslash
1825immediately before it, or to enclose it with square brackets. This
1826change is to bring Perl into conformance with Unicode recommendations.
1827Here are the five characters that generate this warning:
1828U+0085 NEXT LINE,
1829U+200E LEFT-TO-RIGHT MARK,
1830U+200F RIGHT-TO-LEFT MARK,
1831U+2028 LINE SEPARATOR,
1832and
1833U+2029 PARAGRAPH SEPARATOR.
1834
ad19ef22 1835=item Eval-group in insecure regular expression
e4d48cc9 1836
be771a83
GS
1837(F) Perl detected tainted data when trying to compile a regular
1838expression that contains the C<(?{ ... })> zero-width assertion, which
1839is unsafe. See L<perlre/(?{ code })>, and L<perlsec>.
e4d48cc9 1840
ad19ef22 1841=item Eval-group not allowed at runtime, use re 'eval' in regex m/%s/
e4d48cc9 1842
be771a83
GS
1843(F) Perl tried to compile a regular expression containing the
1844C<(?{ ... })> zero-width assertion at run time, as it would when the
f11307f5
FC
1845pattern contains interpolated values. Since that is a security risk,
1846it is not allowed. If you insist, you may still do this by using the
1847C<re 'eval'> pragma or by explicitly building the pattern from an
1848interpolated string at run time and using that in an eval(). See
1849L<perlre/(?{ code })>.
e4d48cc9 1850
ad19ef22 1851=item Eval-group not allowed, use re 'eval' in regex m/%s/
6df41af2 1852
be771a83
GS
1853(F) A regular expression contained the C<(?{ ... })> zero-width
1854assertion, but that construct is only allowed when the C<use re 'eval'>
1855pragma is in effect. See L<perlre/(?{ code })>.
6df41af2 1856
6fbc9859
MH
1857=item EVAL without pos change exceeded limit in regex; marked by <-- HERE in
1858m/%s/
1a147d38
YO
1859
1860(F) You used a pattern that nested too many EVAL calls without consuming
6903afa2 1861any text. Restructure the pattern so that text is consumed.
1a147d38 1862
9e3ec65c 1863The <-- HERE shows whereabouts in the regular expression the problem was
1a147d38
YO
1864discovered.
1865
fc36a67e
PP
1866=item Excessively long <> operator
1867
1868(F) The contents of a <> operator may not exceed the maximum size of a
1869Perl identifier. If you're just trying to glob a long list of
1870filenames, try using the glob() operator, or put the filenames into a
1871variable and glob that.
1872
ed9aa3b7
SG
1873=item exec? I'm not *that* kind of operating system
1874
af8bb25a 1875(F) The C<exec> function is not implemented on some systems, e.g., Symbian
6903afa2 1876OS. See L<perlport>.
ed9aa3b7 1877
fe13d51d 1878=item Execution of %s aborted due to compilation errors.
a0d0e21e
LW
1879
1880(F) The final summary message when a Perl compilation fails.
1881
1882=item Exiting eval via %s
1883
be771a83
GS
1884(W exiting) You are exiting an eval by unconventional means, such as a
1885goto, or a loop control statement.
e476b1b5
GS
1886
1887=item Exiting format via %s
1888
9a2ff54b 1889(W exiting) You are exiting a format by unconventional means, such as a
be771a83 1890goto, or a loop control statement.
a0d0e21e 1891
0a753a76
PP
1892=item Exiting pseudo-block via %s
1893
be771a83
GS
1894(W exiting) You are exiting a rather special block construct (like a
1895sort block or subroutine) by unconventional means, such as a goto, or a
1896loop control statement. See L<perlfunc/sort>.
0a753a76 1897
a0d0e21e
LW
1898=item Exiting subroutine via %s
1899
be771a83
GS
1900(W exiting) You are exiting a subroutine by unconventional means, such
1901as a goto, or a loop control statement.
a0d0e21e
LW
1902
1903=item Exiting substitution via %s
1904
be771a83
GS
1905(W exiting) You are exiting a substitution by unconventional means, such
1906as a return, a goto, or a loop control statement.
a0d0e21e 1907
c608e803
KW
1908=item Expecting close bracket in regex; marked by <-- HERE in m/%s/
1909
675fa9ff 1910(F) You wrote something like
c608e803
KW
1911
1912 (?13
1913
1914to denote a capturing group of the form
1915L<C<(?I<PARNO>)>|perlre/(?PARNO) (?-PARNO) (?+PARNO) (?R) (?0)>,
1916but omitted the C<")">.
1917
e7d0b801
FC
1918=item Experimental "%s" subs not enabled
1919
1920(F) To use lexical subs, you must first enable them:
1921
f1d34ca8 1922 no warnings 'experimental::lexical_subs';
e7d0b801
FC
1923 use feature 'lexical_subs';
1924 my sub foo { ... }
1925
7b8d334a
GS
1926=item Explicit blessing to '' (assuming package main)
1927
be771a83
GS
1928(W misc) You are blessing a reference to a zero length string. This has
1929the effect of blessing the reference into the package main. This is
1930usually not what you want. Consider providing a default target package,
1931e.g. bless($ref, $p || 'MyPackage');
7b8d334a 1932
6df41af2
GS
1933=item %s: Expression syntax
1934
be771a83
GS
1935(A) You've accidentally run your script through B<csh> instead of Perl.
1936Check the #! line, or manually feed your script into Perl yourself.
6df41af2
GS
1937
1938=item %s failed--call queue aborted
1939
3c10abe3
AG
1940(F) An untrapped exception was raised while executing a UNITCHECK,
1941CHECK, INIT, or END subroutine. Processing of the remainder of the
1942queue of such routines has been prematurely ended.
6df41af2 1943
7253e4e3 1944=item False [] range "%s" in regex; marked by <-- HERE in m/%s/
73b437c8 1945
be771a83 1946(W regexp) A character class range must start and end at a literal
7253e4e3
RK
1947character, not another character class like C<\d> or C<[:alpha:]>. The "-"
1948in your false range is interpreted as a literal "-". Consider quoting the
9e3ec65c 1949"-", "\-". The <-- HERE shows whereabouts in the regular expression the
7253e4e3 1950problem was discovered. See L<perlre>.
73b437c8 1951
1b1ee2ef 1952=item Fatal VMS error (status=%d) at %s, line %d
a0d0e21e 1953
be771a83
GS
1954(P) An error peculiar to VMS. Something untoward happened in a VMS
1955system service or RTL routine; Perl's exit status should provide more
1956details. The filename in "at %s" and the line number in "line %d" tell
1957you which section of the Perl source code is distressed.
a0d0e21e
LW
1958
1959=item fcntl is not implemented
1960
1961(F) Your machine apparently doesn't implement fcntl(). What is this, a
1962PDP-11 or something?
1963
22846ab4
AB
1964=item FETCHSIZE returned a negative value
1965
1966(F) A tied array claimed to have a negative number of elements, which
1967is not possible.
1968
f337b084
TH
1969=item Field too wide in 'u' format in pack
1970
d8b5cc61 1971(W pack) Each line in an uuencoded string starts with a length indicator
6903afa2
FC
1972which can't encode values above 63. So there is no point in asking for
1973a line length bigger than that. Perl will behave as if you specified
5c96f6f7 1974C<u63> as the format.
f337b084 1975
af8c498a 1976=item Filehandle %s opened only for input
a0d0e21e 1977
6c8d78fb
HS
1978(W io) You tried to write on a read-only filehandle. If you intended
1979it to be a read-write filehandle, you needed to open it with "+<" or
1980"+>" or "+>>" instead of with "<" or nothing. If you intended only to
1981write the file, use ">" or ">>". See L<perlfunc/open>.
a0d0e21e 1982
af8c498a 1983=item Filehandle %s opened only for output
a0d0e21e 1984
6c8d78fb
HS
1985(W io) You tried to read from a filehandle opened only for writing, If
1986you intended it to be a read/write filehandle, you needed to open it
89a1bda8
FC
1987with "+<" or "+>" or "+>>" instead of with ">". If you intended only to
1988read from the file, use "<". See L<perlfunc/open>. Another possibility
1989is that you attempted to open filedescriptor 0 (also known as STDIN) for
1990output (maybe you closed STDIN earlier?).
97828cef
RGS
1991
1992=item Filehandle %s reopened as %s only for input
1993
1994(W io) You opened for reading a filehandle that got the same filehandle id
6903afa2 1995as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR
97828cef
RGS
1996previously.
1997
1998=item Filehandle STDIN reopened as %s only for output
1999
2000(W io) You opened for writing a filehandle that got the same filehandle id
fa816bf3 2001as STDIN. This occurred because you closed STDIN previously.
a0d0e21e
LW
2002
2003=item Final $ should be \$ or $name
2004
2005(F) You must now decide whether the final $ in a string was meant to be
be771a83
GS
2006a literal dollar sign, or was meant to introduce a variable name that
2007happens to be missing. So you have to put either the backslash or the
2008name.
a0d0e21e 2009
56e90b21
GS
2010=item flock() on closed filehandle %s
2011
be771a83 2012(W closed) The filehandle you're attempting to flock() got itself closed
c289d2f7 2013some time before now. Check your control flow. flock() operates on
be771a83
GS
2014filehandles. Are you attempting to call flock() on a dirhandle by the
2015same name?
56e90b21 2016
6df41af2
GS
2017=item Format not terminated
2018
2019(F) A format must be terminated by a line with a solitary dot. Perl got
2020to the end of your file without finding such a line.
2021
a0d0e21e
LW
2022=item Format %s redefined
2023
e476b1b5 2024(W redefine) You redefined a format. To suppress this warning, say
a0d0e21e
LW
2025
2026 {
271595cc 2027 no warnings 'redefine';
a0d0e21e
LW
2028 eval "format NAME =...";
2029 }
2030
a0d0e21e
LW
2031=item Found = in conditional, should be ==
2032
e476b1b5 2033(W syntax) You said
a0d0e21e
LW
2034
2035 if ($foo = 123)
2036
2037when you meant
2038
2039 if ($foo == 123)
2040
2041(or something like that).
2042
6df41af2
GS
2043=item %s found where operator expected
2044
56da5a46
RGS
2045(S syntax) The Perl lexer knows whether to expect a term or an operator.
2046If it sees what it knows to be a term when it was expecting to see an
be771a83
GS
2047operator, it gives you this warning. Usually it indicates that an
2048operator or delimiter was omitted, such as a semicolon.
6df41af2 2049
a0d0e21e
LW
2050=item gdbm store returned %d, errno %d, key "%s"
2051
2052(S) A warning from the GDBM_File extension that a store failed.
2053
2054=item gethostent not implemented
2055
2056(F) Your C library apparently doesn't implement gethostent(), probably
2057because if it did, it'd feel morally obligated to return every hostname
2058on the Internet.
2059
69282e91 2060=item get%sname() on closed socket %s
a0d0e21e 2061
be771a83
GS
2062(W closed) You tried to get a socket or peer socket name on a closed
2063socket. Did you forget to check the return value of your socket() call?
a0d0e21e 2064
748a9306
LW
2065=item getpwnam returned invalid UIC %#o for user "%s"
2066
2067(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
2068C<getpwnam> operator returned an invalid UIC.
2069
6df41af2
GS
2070=item getsockopt() on closed socket %s
2071
be771a83
GS
2072(W closed) You tried to get a socket option on a closed socket. Did you
2073forget to check the return value of your socket() call? See
6df41af2
GS
2074L<perlfunc/getsockopt>.
2075
0f539b13
BF
2076=item given is experimental
2077
675fa9ff
FC
2078(S experimental::smartmatch) C<given> depends on smartmatch, which
2079is experimental, so its behavior may change or even be removed
2080in any future release of perl. See the explanation under
2081L<perlsyn/Experimental Details on given and when>.
0f539b13 2082
6df41af2
GS
2083=item Global symbol "%s" requires explicit package name
2084
a4edf47d 2085(F) You've said "use strict" or "use strict vars", which indicates
30c282f6 2086that all variables must either be lexically scoped (using "my" or "state"),
a4edf47d
GS
2087declared beforehand using "our", or explicitly qualified to say
2088which package the global variable is in (using "::").
6df41af2 2089
e476b1b5
GS
2090=item glob failed (%s)
2091
5ead438e 2092(S glob) Something went wrong with the external program(s) used
73c4e9dc
FC
2093for C<glob> and C<< <*.c> >>. Usually, this means that you supplied a C<glob>
2094pattern that caused the external program to fail and exit with a
be771a83 2095nonzero status. If the message indicates that the abnormal exit
73c4e9dc
FC
2096resulted in a coredump, this may also mean that your csh (C shell)
2097is broken. If so, you should change all of the csh-related variables
2098in config.sh: If you have tcsh, make the variables refer to it as
2099if it were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them
2100all empty (except that C<d_csh> should be C<'undef'>) so that Perl will
be771a83 2101think csh is missing. In either case, after editing config.sh, run
75b44862 2102C<./Configure -S> and rebuild Perl.
e476b1b5 2103
a0d0e21e
LW
2104=item Glob not terminated
2105
2106(F) The lexer saw a left angle bracket in a place where it was expecting
be771a83
GS
2107a term, so it's looking for the corresponding right angle bracket, and
2108not finding it. Chances are you left some needed parentheses out
2109earlier in the line, and you really meant a "less than".
a0d0e21e 2110
bcd05b94 2111=item gmtime(%f) too large
8b56d6ff 2112
e9200be3 2113(W overflow) You called C<gmtime> with a number that was larger than
fc003d4b 2114it can reliably handle and C<gmtime> probably returned the wrong
6903afa2 2115date. This warning is also triggered with NaN (the special
fc003d4b
MS
2116not-a-number value).
2117
bcd05b94 2118=item gmtime(%f) too small
fc003d4b 2119
e9200be3 2120(W overflow) You called C<gmtime> with a number that was smaller than
e7a1a147 2121it can reliably handle and C<gmtime> probably returned the wrong date.
8b56d6ff 2122
6df41af2 2123=item Got an error from DosAllocMem
a0d0e21e 2124
6df41af2
GS
2125(P) An error peculiar to OS/2. Most probably you're using an obsolete
2126version of Perl, and this should not happen anyway.
a0d0e21e
LW
2127
2128=item goto must have label
2129
2130(F) Unlike with "next" or "last", you're not allowed to goto an
2131unspecified destination. See L<perlfunc/goto>.
2132
6651ba0b
FC
2133=item Goto undefined subroutine%s
2134
2135(F) You tried to call a subroutine with C<goto &sub> syntax, but
2136the indicated subroutine hasn't been defined, or if it was, it
2137has since been undefined.
2138
6fbc9859
MH
2139=item Group name must start with a non-digit word character in regex; marked by
2140<-- HERE in m/%s/
1f4f6bf1
YO
2141
2142(F) Group names must follow the rules for perl identifiers, meaning
2143they must start with a non-digit word character. A common cause of
2144this error is using (?&0) instead of (?0). See L<perlre>.
2145
5a25739d
FC
2146=item ()-group starts with a count
2147
2148(F) A ()-group started with a count. A count is supposed to follow
2149something: a template character or a ()-group. See L<perlfunc/pack>.
2150
fe13d51d 2151=item %s had compilation errors.
6df41af2
GS
2152
2153(F) The final summary message when a C<perl -c> fails.
2154
a0d0e21e
LW
2155=item Had to create %s unexpectedly
2156
be771a83
GS
2157(S internal) A routine asked for a symbol from a symbol table that ought
2158to have existed already, but for some reason it didn't, and had to be
2159created on an emergency basis to prevent a core dump.
a0d0e21e
LW
2160
2161=item Hash %%s missing the % in argument %d of %s()
2162
be771a83
GS
2163(D deprecated) Really old Perl let you omit the % on hash names in some
2164spots. This is now heavily deprecated.
a0d0e21e 2165
6df41af2
GS
2166=item %s has too many errors
2167
2168(F) The parser has given up trying to parse the program after 10 errors.
2169Further error messages would likely be uninformative.
2170
252aa082
JH
2171=item Hexadecimal number > 0xffffffff non-portable
2172
e476b1b5 2173(W portable) The hexadecimal number you specified is larger than 2**32-1
9e24b6e2
JH
2174(4294967295) and therefore non-portable between systems. See
2175L<perlport> for more on portability concerns.
252aa082 2176
8903cb82
PP
2177=item Identifier too long
2178
2179(F) Perl limits identifiers (names for variables, functions, etc.) to
fc36a67e 2180about 250 characters for simple names, and somewhat more for compound
be771a83
GS
2181names (like C<$A::B>). You've exceeded Perl's limits. Future versions
2182of Perl are likely to eliminate these arbitrary limitations.
8903cb82 2183
b33c0c71 2184=item Ignoring zero length \N{} in character class in regex; marked by <-- HERE in m/%s/
fc8cd66c 2185
b33c0c71 2186(W regexp) Named Unicode character escapes C<(\N{...})> may return a zero-length
6903afa2
FC
2187sequence. When such an escape is used in a character class its
2188behaviour is not well defined. Check that the correct escape has
fc8cd66c
YO
2189been used, and the correct charname handler is in scope.
2190
6df41af2 2191=item Illegal binary digit %s
f675dbe5 2192
6df41af2 2193(F) You used a digit other than 0 or 1 in a binary number.
f675dbe5 2194
6df41af2 2195=item Illegal binary digit %s ignored
a0d0e21e 2196
be771a83
GS
2197(W digit) You may have tried to use a digit other than 0 or 1 in a
2198binary number. Interpretation of the binary number stopped before the
2199offending digit.
a0d0e21e 2200
6597eb22
FC
2201=item Illegal character after '_' in prototype for %s : %s
2202
2203(W illegalproto) An illegal character was found in a prototype declaration.
2204Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
2205
78d0fecf 2206=item Illegal character \%o (carriage return)
4fdae800 2207
d5898338 2208(F) Perl normally treats carriage returns in the program text as it
be771a83
GS
2209would any other whitespace, which means you should never see this error
2210when Perl was built using standard options. For some reason, your
2211version of Perl appears to have been built without this support. Talk
2212to your Perl administrator.
4fdae800 2213
d37a9538
ST
2214=item Illegal character in prototype for %s : %s
2215
197afce1 2216(W illegalproto) An illegal character was found in a prototype declaration.
2e9cc7ef 2217Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
d37a9538 2218
904d85c5
RGS
2219=item Illegal declaration of anonymous subroutine
2220
2221(F) When using the C<sub> keyword to construct an anonymous subroutine,
6903afa2 2222you must always specify a block of code. See L<perlsub>.
904d85c5 2223
8e742a20
MHM
2224=item Illegal declaration of subroutine %s
2225
6903afa2 2226(F) A subroutine was not declared correctly. See L<perlsub>.
8e742a20 2227
a0d0e21e
LW
2228=item Illegal division by zero
2229
be771a83
GS
2230(F) You tried to divide a number by 0. Either something was wrong in
2231your logic, or you need to put a conditional in to guard against
2232meaningless input.
a0d0e21e 2233
6df41af2
GS
2234=item Illegal hexadecimal digit %s ignored
2235
be771a83
GS
2236(W digit) You may have tried to use a character other than 0 - 9 or
2237A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal
2238number stopped before the illegal character.
6df41af2 2239
a0d0e21e
LW
2240=item Illegal modulus zero
2241
be771a83
GS
2242(F) You tried to divide a number by 0 to get the remainder. Most
2243numbers don't take to this kindly.
a0d0e21e 2244
6df41af2 2245=item Illegal number of bits in vec
399388f4 2246
6df41af2
GS
2247(F) The number of bits in vec() (the third argument) must be a power of
2248two from 1 to 32 (or 64, if your platform supports that).
399388f4
GS
2249
2250=item Illegal octal digit %s
a0d0e21e 2251
d1be9408 2252(F) You used an 8 or 9 in an octal number.
a0d0e21e 2253
399388f4 2254=item Illegal octal digit %s ignored
748a9306 2255
d1be9408 2256(W digit) You may have tried to use an 8 or 9 in an octal number.
75b44862 2257Interpretation of the octal number stopped before the 8 or 9.
748a9306 2258
c608e803
KW
2259=item Illegal pattern in regex; marked by <-- HERE in m/%s/
2260
675fa9ff 2261(F) You wrote something like
c608e803
KW
2262
2263 (?+foo)
2264
2265The C<"+"> is valid only when followed by digits, indicating a
2266capturing group. See
2267L<C<(?I<PARNO>)>|perlre/(?PARNO) (?-PARNO) (?+PARNO) (?R) (?0)>.
2268
fe13d51d 2269=item Illegal switch in PERL5OPT: -%c
6ff81951 2270
6df41af2 2271(X) The PERL5OPT environment variable may only be used to set the
646ca9b2 2272following switches: B<-[CDIMUdmtw]>.
6ff81951 2273
6df41af2 2274=item Ill-formed CRTL environ value "%s"
81e118e0 2275
75b44862 2276(W internal) A warning peculiar to VMS. Perl tried to read the CRTL's
be771a83
GS
2277internal environ array, and encountered an element without the C<=>
2278delimiter used to separate keys from values. The element is ignored.
09bef843 2279
6df41af2 2280=item Ill-formed message in prime_env_iter: |%s|
54310121 2281
be771a83
GS
2282(W internal) A warning peculiar to VMS. Perl tried to read a logical
2283name or CLI symbol definition when preparing to iterate over %ENV, and
2284didn't see the expected delimiter between key and value, so the line was
2285ignored.
54310121 2286
6df41af2 2287=item (in cleanup) %s
9607fc9c 2288
be771a83
GS
2289(W misc) This prefix usually indicates that a DESTROY() method raised
2290the indicated exception. Since destructors are usually called by the
2291system at arbitrary points during execution, and often a vast number of
2292times, the warning is issued only once for any number of failures that
2293would otherwise result in the same message being repeated.
6df41af2 2294
be771a83
GS
2295Failure of user callbacks dispatched using the C<G_KEEPERR> flag could
2296also result in this warning. See L<perlcall/G_KEEPERR>.
9607fc9c 2297
0d0b4b3b
KW
2298=item Incomplete expression within '(?[ ])' in regex; marked by <-- HERE in m/%s/
2299
675fa9ff 2300(F) There was a syntax error within the C<(?[ ])>. This can happen if the
0d0b4b3b
KW
2301expression inside the construct was completely empty, or if there are
2302too many or few operands for the number of operators. Perl is not smart
2303enough to give you a more precise indication as to what is wrong.
2304
6fbc9859
MH
2305=item Inconsistent hierarchy during C3 merge of class '%s': merging failed on
2306parent '%s'
2c7d6b9c
RGS
2307
2308(F) The method resolution order (MRO) of the given class is not
2309C3-consistent, and you have enabled the C3 MRO for this class. See the C3
2310documentation in L<mro> for more information.
2311
979699d9
JH
2312=item In EBCDIC the v-string components cannot exceed 2147483647
2313
2314(F) An error peculiar to EBCDIC. Internally, v-strings are stored as
2315Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC
2316encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF).
2317
1a147d38
YO
2318=item Infinite recursion in regex; marked by <-- HERE in m/%s/
2319
2320(F) You used a pattern that references itself without consuming any input
6903afa2 2321text. You should check the pattern to ensure that recursive patterns
1a147d38
YO
2322either consume text or fail.
2323
9e3ec65c 2324The <-- HERE shows whereabouts in the regular expression the problem was
1a147d38
YO
2325discovered.
2326
6dbe9451
NC
2327=item Initialization of state variables in list context currently forbidden
2328
6903afa2
FC
2329(F) Currently the implementation of "state" only permits the
2330initialization of scalar variables in scalar context. Re-write
2331C<state ($a) = 42> as C<state $a = 42> to change from list to scalar
2332context. Constructions such as C<state (@a) = foo()> will be
2333supported in a future perl release.
6dbe9451 2334
a0d0e21e
LW
2335=item Insecure dependency in %s
2336
8b1a09fc 2337(F) You tried to do something that the tainting mechanism didn't like.
be771a83
GS
2338The tainting mechanism is turned on when you're running setuid or
2339setgid, or when you specify B<-T> to turn it on explicitly. The
2340tainting mechanism labels all data that's derived directly or indirectly
2341from the user, who is considered to be unworthy of your trust. If any
2342such data is used in a "dangerous" operation, you get this error. See
2343L<perlsec> for more information.
a0d0e21e
LW
2344
2345=item Insecure directory in %s
2346
be771a83
GS
2347(F) You can't use system(), exec(), or a piped open in a setuid or
2348setgid script if C<$ENV{PATH}> contains a directory that is writable by
df98f984
RGS
2349the world. Also, the PATH must not contain any relative directory.
2350See L<perlsec>.
a0d0e21e 2351
62f468fc 2352=item Insecure $ENV{%s} while running %s
a0d0e21e
LW
2353
2354(F) You can't use system(), exec(), or a piped open in a setuid or
62f468fc 2355setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
332d5f78
SR
2356C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data
2357supplied (or potentially supplied) by the user. The script must set
2358the path to a known value, using trustworthy data. See L<perlsec>.
a0d0e21e 2359
0e9be77f
DM
2360=item Insecure user-defined property %s
2361
2362(F) Perl detected tainted data when trying to compile a regular
2363expression that contains a call to a user-defined character property
2364function, i.e. C<\p{IsFoo}> or C<\p{InFoo}>.
2365See L<perlunicode/User-Defined Character Properties> and L<perlsec>.
2366
675fa9ff
FC
2367=item In '(?...)', splitting the initial '(?' is deprecated in regex; marked by <-- HERE in m/%s/
2368
2369(D regexp, deprecated) The two-character sequence C<"(?"> in
2370this context in a regular expression pattern should be an
2371indivisible token, with nothing intervening between the C<"(">
2372and the C<"?">, but you separated them. Due to an accident of
2373implementation, this prohibition was not enforced, but we do
2374plan to forbid it in a future Perl version. This message
2375serves as giving you fair warning of this pending change.
2376
b9ef414d
FC
2377=item Integer overflow in format string for %s
2378
2379(F) The indexes and widths specified in the format string of C<printf()>
2380or C<sprintf()> are too large. The numbers must not overflow the size of
2381integers for your architecture.
2382
a7ae9550
GS
2383=item Integer overflow in %s number
2384
35928bc5 2385(S overflow) The hexadecimal, octal or binary number you have specified
be771a83
GS
2386either as a literal or as an argument to hex() or oct() is too big for
2387your architecture, and has been converted to a floating point number.
2388On a 32-bit architecture the largest hexadecimal, octal or binary number
9e24b6e2
JH
2389representable without overflow is 0xFFFFFFFF, 037777777777, or
23900b11111111111111111111111111111111 respectively. Note that Perl
2391transparently promotes all numbers to a floating point representation
2392internally--subject to loss of precision errors in subsequent
2393operations.
bbce6d69 2394
fc89ca81
FC
2395=item Integer overflow in srand
2396
2397(S overflow) The number you have passed to srand is too big to fit
2398in your architecture's integer representation. The number has been
2399replaced with the largest integer supported (0xFFFFFFFF on 32-bit
2400architectures). This means you may be getting less randomness than
2401you expect, because different random seeds above the maximum will
2402return the same sequence of random numbers.
2403
46314c13
JP
2404=item Integer overflow in version
2405
18da5252
FC
2406=item Integer overflow in version %d
2407
784d71ed
FC
2408(W overflow) Some portion of a version initialization is too large for
2409the size of integers for your architecture. This is not a warning
f084e84f 2410because there is no rational reason for a version to try and use an
784d71ed
FC
2411element larger than typically 2**32. This is usually caused by trying
2412to use some odd mathematical operation as a version, like 100/9.
46314c13 2413
7253e4e3 2414=item Internal disaster in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2415
2416(P) Something went badly wrong in the regular expression parser.
9e3ec65c 2417The <-- HERE shows whereabouts in the regular expression the problem was
b45f050a
JF
2418discovered.
2419
748a9306
LW
2420=item Internal inconsistency in tracking vforks
2421
be771a83
GS
2422(S) A warning peculiar to VMS. Perl keeps track of the number of times
2423you've called C<fork> and C<exec>, to determine whether the current call
2424to C<exec> should affect the current script or a subprocess (see
2425L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so
2426Perl is making a guess and treating this C<exec> as a request to
2427terminate the Perl script and execute the specified command.
748a9306 2428
7253e4e3 2429=item Internal urp in regex; marked by <-- HERE in m/%s/
b45f050a 2430
fa816bf3 2431(P) Something went badly awry in the regular expression parser. The
9e3ec65c 2432<-- HERE shows whereabouts in the regular expression the problem was
7253e4e3 2433discovered.
a0d0e21e 2434
6df41af2
GS
2435=item %s (...) interpreted as function
2436
75b44862 2437(W syntax) You've run afoul of the rule that says that any list operator
be771a83 2438followed by parentheses turns into a function, with all the list
64977eb6 2439operators arguments found inside the parentheses. See
13a2d996 2440L<perlop/Terms and List Operators (Leftward)>.
6df41af2 2441
09bef843
SB
2442=item Invalid %s attribute: %s
2443
a4a4c9e2 2444(F) The indicated attribute for a subroutine or variable was not recognized
09bef843
SB
2445by Perl or by a user-supplied handler. See L<attributes>.
2446
2447=item Invalid %s attributes: %s
2448
a4a4c9e2 2449(F) The indicated attributes for a subroutine or variable were not
be771a83 2450recognized by Perl or by a user-supplied handler. See L<attributes>.
09bef843 2451
225fb84f
KW
2452=item Invalid character in charnames alias definition; marked by <-- HERE in '%s
2453
2454(F) You tried to create a custom alias for a character name, with
2455the C<:alias> option to C<use charnames> and the specified character in
2456the indicated name isn't valid. See L<charnames/CUSTOM ALIASES>.
2457
5a25739d
FC
2458=item Invalid character in \N{...}; marked by <-- HERE in \N{%s}
2459
2460(F) Only certain characters are valid for character names. The
2461indicated one isn't. See L<charnames/CUSTOM ALIASES>.
2462
c635e13b
PP
2463=item Invalid conversion in %s: "%s"
2464
be771a83
GS
2465(W printf) Perl does not understand the given format conversion. See
2466L<perlfunc/sprintf>.
c635e13b 2467
6fbc9859
MH
2468=item Invalid escape in the specified encoding in regex; marked by <-- HERE in
2469m/%s/
9e08bc66
ST
2470
2471(W regexp) The numeric escape (for example C<\xHH>) of value < 256
2472didn't correspond to a single character through the conversion
2473from the encoding specified by the encoding pragma.
2474The escape was replaced with REPLACEMENT CHARACTER (U+FFFD) instead.
9e3ec65c 2475The <-- HERE shows whereabouts in the regular expression the
9e08bc66
ST
2476escape was discovered.
2477
8149aa9f
FC
2478=item Invalid hexadecimal number in \N{U+...}
2479
6fbc9859
MH
2480=item Invalid hexadecimal number in \N{U+...} in regex; marked by <-- HERE in
2481m/%s/
aec0ef10 2482
8149aa9f 2483(F) The character constant represented by C<...> is not a valid hexadecimal
74f8e9e3
FC
2484number. Either it is empty, or you tried to use a character other than
24850 - 9 or A - F, a - f in a hexadecimal number.
8149aa9f 2486
6651ba0b
FC
2487=item Invalid module name %s with -%c option: contains single ':'
2488
2489(F) The module argument to perl's B<-m> and B<-M> command-line options
2490cannot contain single colons in the module name, but only in the
2491arguments after "=". In other words, B<-MFoo::Bar=:baz> is ok, but
2492B<-MFoo:Bar=baz> is not.
2493
2c7d6b9c
RGS
2494=item Invalid mro name: '%s'
2495
162a3e34
FC
2496(F) You tried to C<mro::set_mro("classname", "foo")> or C<use mro 'foo'>,
2497where C<foo> is not a valid method resolution order (MRO). Currently,
2498the only valid ones supported are C<dfs> and C<c3>, unless you have loaded
2499a module that is a MRO plugin. See L<mro> and L<perlmroapi>.
2c7d6b9c 2500
40e4140b
FC
2501=item Invalid negative number (%s) in chr
2502
2503(W utf8) You passed a negative number to C<chr>. Negative numbers are
2504not valid characters numbers, so it return the Unicode replacement
2505character (U+FFFD).
2506
6651ba0b
FC
2507=item invalid option -D%c, use -D'' to see choices
2508
8ff21bfe
FC
2509(S debugging) Perl was called with invalid debugger flags. Call perl
2510with the B<-D> option with no flags to see the list of acceptable values.
982c4ecb 2511See also L<perlrun/-Dletters>.
6651ba0b 2512
7253e4e3 2513=item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2514
2515(F) The range specified in a character class had a minimum character
7253e4e3
RK
2516greater than the maximum character. One possibility is that you forgot the
2517C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only
9e3ec65c 2518up to C<ff>. The <-- HERE shows whereabouts in the regular expression the
7253e4e3 2519problem was discovered. See L<perlre>.
6df41af2 2520
d1573ac7 2521=item Invalid range "%s" in transliteration operator
c2e66d9e
GS
2522
2523(F) The range specified in the tr/// or y/// operator had a minimum
2524character greater than the maximum character. See L<perlop>.
2525
09bef843
SB
2526=item Invalid separator character %s in attribute list
2527
0120eecf 2528(F) Something other than a colon or whitespace was seen between the
be771a83
GS
2529elements of an attribute list. If the previous attribute had a
2530parenthesised parameter list, perhaps that list was terminated too soon.
2531See L<attributes>.
09bef843 2532
b4581f09
JH
2533=item Invalid separator character %s in PerlIO layer specification %s
2534
2bfc5f71
FC
2535(W layer) When pushing layers onto the Perl I/O system, something other
2536than a colon or whitespace was seen between the elements of a layer list.
b4581f09
JH
2537If the previous attribute had a parenthesised parameter list, perhaps that
2538list was terminated too soon.
2539
2c86d456
DG
2540=item Invalid strict version format (%s)
2541
fa816bf3 2542(F) A version number did not meet the "strict" criteria for versions.
2c86d456
DG
2543A "strict" version number is a positive decimal number (integer or
2544decimal-fraction) without exponentiation or else a dotted-decimal
2545v-string with a leading 'v' character and at least three components.
a6485a24 2546The parenthesized text indicates which criteria were not met.
2c86d456
DG
2547See the L<version> module for more details on allowed version formats.
2548
49704364 2549=item Invalid type '%s' in %s
96e4d5b1 2550
49704364
LW
2551(F) The given character is not a valid pack or unpack type.
2552See L<perlfunc/pack>.
6728c851 2553
49704364 2554(W) The given character is not a valid pack or unpack type but used to be
75b44862 2555silently ignored.
96e4d5b1 2556
2c86d456
DG
2557=item Invalid version format (%s)
2558
fa816bf3 2559(F) A version number did not meet the "lax" criteria for versions.
2c86d456
DG
2560A "lax" version number is a positive decimal number (integer or
2561decimal-fraction) without exponentiation or else a dotted-decimal
fa816bf3
FC
2562v-string. If the v-string has fewer than three components, it
2563must have a leading 'v' character. Otherwise, the leading 'v' is
2564optional. Both decimal and dotted-decimal versions may have a
2565trailing "alpha" component separated by an underscore character
2566after a fractional or dotted-decimal component. The parenthesized
2567text indicates which criteria were not met. See the L<version> module
2568for more details on allowed version formats.
46314c13 2569
798ae1b7
DG
2570=item Invalid version object
2571
fa816bf3
FC
2572(F) The internal structure of the version object was invalid.
2573Perhaps the internals were modified directly in some way or
2574an arbitrary reference was blessed into the "version" class.
798ae1b7 2575
675fa9ff
FC
2576=item In '(*VERB...)', splitting the initial '(*' is deprecated in regex; marked by <-- HERE in m/%s/
2577
2578(D regexp, deprecated) The two-character sequence C<"(*"> in
2579this context in a regular expression pattern should be an
2580indivisible token, with nothing intervening between the C<"(">
2581and the C<"*">, but you separated them. Due to an accident of
2582implementation, this prohibition was not enforced, but we do
2583plan to forbid it in a future Perl version. This message
2584serves as giving you fair warning of this pending change.
2585
a0d0e21e
LW
2586=item ioctl is not implemented
2587
2588(F) Your machine apparently doesn't implement ioctl(), which is pretty
2589strange for a machine that supports C.
2590
c289d2f7
JH
2591=item ioctl() on unopened %s
2592
2593(W unopened) You tried ioctl() on a filehandle that was never opened.
34b6fd5e 2594Check your control flow and number of arguments.
c289d2f7 2595
fe13d51d 2596=item IO layers (like '%s') unavailable
363c40c4
SB
2597
2598(F) Your Perl has not been configured to have PerlIO, and therefore
34b6fd5e 2599you cannot use IO layers. To have PerlIO, Perl must be configured
363c40c4
SB
2600with 'useperlio'.
2601
80cbd5ad
JH
2602=item IO::Socket::atmark not implemented on this architecture
2603
2604(F) Your machine doesn't implement the sockatmark() functionality,
34b6fd5e 2605neither as a system call nor an ioctl call (SIOCATMARK).
80cbd5ad 2606
4f650b80 2607=item $* is no longer supported
b4581f09 2608
4f650b80
NC
2609(D deprecated, syntax) The special variable C<$*>, deprecated in older
2610perls, has been removed as of 5.9.0 and is no longer supported. In
2611previous versions of perl the use of C<$*> enabled or disabled multi-line
2612matching within a string.
4fd19576
B
2613
2614Instead of using C<$*> you should use the C</m> (and maybe C</s>) regexp
6903afa2
FC
2615modifiers. You can enable C</m> for a lexical scope (even a whole file)
2616with C<use re '/m'>. (In older versions: when C<$*> was set to a true value
570dedd4 2617then all regular expressions behaved as if they were written using C</m>.)
b4581f09 2618
8ae1fe26
RGS
2619=item $# is no longer supported
2620
a58ac25e 2621(D deprecated, syntax) The special variable C<$#>, deprecated in older
6903afa2 2622perls, has been removed as of 5.9.3 and is no longer supported. You
a58ac25e 2623should use the printf/sprintf functions instead.
8ae1fe26 2624
ccf3535a 2625=item '%s' is not a code reference
6ad11d81 2626
6903afa2
FC
2627(W overload) The second (fourth, sixth, ...) argument of
2628overload::constant needs to be a code reference. Either
2629an anonymous subroutine, or a reference to a subroutine.
6ad11d81 2630
ccf3535a 2631=item '%s' is not an overloadable type
6ad11d81 2632
04a80ee0
RGS
2633(W overload) You tried to overload a constant type the overload package is
2634unaware of.
6ad11d81 2635
5a25739d
FC
2636=item -i used with no filenames on the command line, reading from STDIN
2637
2638(S inplace) The C<-i> option was passed on the command line, indicating
2639that the script is intended to edit files in place, but no files were
2640given. This is usually a mistake, since editing STDIN in place doesn't
2641make sense, and can be confusing because it can make perl look like
2642it is hanging when it is really just trying to read from STDIN. You
2643should either pass a filename to edit, or remove C<-i> from the command
2644line. See L<perlrun> for more details.
2645
aec0ef10 2646=item Junk on end of regexp in regex m/%s/
a0d0e21e
LW
2647
2648(P) The regular expression parser is confused.
2649
2650=item Label not found for "last %s"
2651
be771a83
GS
2652(F) You named a loop to break out of, but you're not currently in a loop
2653of that name, not even if you count where you were called from. See
2654L<perlfunc/last>.
a0d0e21e
LW
2655
2656=item Label not found for "next %s"
2657
2658(F) You named a loop to continue, but you're not currently in a loop of
2659that name, not even if you count where you were called from. See
2660L<perlfunc/last>.
2661
2662=item Label not found for "redo %s"
2663
2664(F) You named a loop to restart, but you're not currently in a loop of
2665that name, not even if you count where you were called from. See
2666L<perlfunc/last>.
2667
85ab1d1d 2668=item leaving effective %s failed
5ff3f7a4 2669
85ab1d1d 2670(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
2671effective uids or gids failed.
2672
49704364
LW
2673=item length/code after end of string in unpack
2674
d7f8936a 2675(F) While unpacking, the string buffer was already used up when an unpack
6903afa2
FC
2676length/code combination tried to obtain more data. This results in
2677an undefined value for the length. See L<perlfunc/pack>.
49704364 2678
e508c8a4
MH
2679=item length() used on %s
2680
0d46a4e7
FC
2681(W syntax) You used length() on either an array or a hash when you
2682probably wanted a count of the items.
e508c8a4
MH
2683
2684Array size can be obtained by doing:
2685
2686 scalar(@array);
2687
2688The number of items in a hash can be obtained by doing:
2689
2690 scalar(keys %hash);
2691
f0e67a1d
Z
2692=item Lexing code attempted to stuff non-Latin-1 character into Latin-1 input
2693
d4fe7078
RS
2694(F) An extension is attempting to insert text into the current parse
2695(using L<lex_stuff_pvn|perlapi/lex_stuff_pvn> or similar), but tried to insert a character that
2696couldn't be part of the current input. This is an inherent pitfall
2697of the stuffing mechanism, and one of the reasons to avoid it. Where
6903afa2 2698it is necessary to stuff, stuffing only plain ASCII is recommended.
f0e67a1d
Z
2699
2700=item Lexing code internal error (%s)
2701
2702(F) Lexing code supplied by an extension violated the lexer's API in a
2703detectable way.
2704
69282e91 2705=item listen() on closed socket %s
a0d0e21e 2706
be771a83
GS
2707(W closed) You tried to do a listen on a closed socket. Did you forget
2708to check the return value of your socket() call? See
2709L<perlfunc/listen>.
a0d0e21e 2710
6651ba0b
FC
2711=item List form of piped open not implemented
2712
2713(F) On some platforms, notably Windows, the three-or-more-arguments
2714form of C<open> does not support pipes, such as C<open($pipe, '|-', @args)>.
2715Use the two-argument C<open($pipe, '|prog arg1 arg2...')> form instead.
2716
bcd05b94 2717=item localtime(%f) too large
8b56d6ff 2718
e9200be3 2719(W overflow) You called C<localtime> with a number that was larger
fc003d4b 2720than it can reliably handle and C<localtime> probably returned the
6903afa2 2721wrong date. This warning is also triggered with NaN (the special
fc003d4b
MS
2722not-a-number value).
2723
bcd05b94 2724=item localtime(%f) too small
fc003d4b 2725
e9200be3 2726(W overflow) You called C<localtime> with a number that was smaller
fc003d4b 2727than it can reliably handle and C<localtime> probably returned the
e7a1a147 2728wrong date.
8b56d6ff 2729
58e23c8d 2730=item Lookbehind longer than %d not implemented in regex m/%s/
b45f050a
JF
2731
2732(F) There is currently a limit on the length of string which lookbehind can
6903afa2 2733handle. This restriction may be eased in a future release.
2e50fd82 2734
b88df990
NC
2735=item Lost precision when %s %f by 1
2736
e63e8a91
FC
2737(W imprecision) The value you attempted to increment or decrement by one
2738is too large for the underlying floating point representation to store
2739accurately, hence the target of C<++> or C<--> is unchanged. Perl issues this
2740warning because it has already switched from integers to floating point
2741when values are too large for integers, and now even floating point is
2742insufficient. You may wish to switch to using L<Math::BigInt> explicitly.
b88df990 2743
93fad930 2744=item lstat() on filehandle%s
2f7da168
RK
2745
2746(W io) You tried to do an lstat on a filehandle. What did you mean
2747by that? lstat() makes sense only on filenames. (Perl did a fstat()
2748instead on the filehandle.)
2749
345d70e3 2750=item lvalue attribute %s already-defined subroutine
bb3abb05 2751
345d70e3
FC
2752(W misc) Although L<attributes.pm|attributes> allows this, turning the lvalue
2753attribute on or off on a Perl subroutine that is already defined
2754does not always work properly. It may or may not do what you
2755want, depending on what code is inside the subroutine, with exact
2756details subject to change between Perl versions. Only do this
2757if you really know what you are doing.
bb3abb05 2758
885ef6f5
GG
2759=item lvalue attribute ignored after the subroutine has been defined
2760
345d70e3
FC
2761(W misc) Using the C<:lvalue> declarative syntax to make a Perl
2762subroutine an lvalue subroutine after it has been defined is
2763not permitted. To make the subroutine an lvalue subroutine,
2764add the lvalue attribute to the definition, or put the C<sub
2765foo :lvalue;> declaration before the definition.
2766
2767See also L<attributes.pm|attributes>.
885ef6f5 2768
2db62bbc 2769=item Malformed integer in [] in pack
49704364 2770
2db62bbc 2771(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2772are permitted. See L<perlfunc/pack>.
2773
2774=item Malformed integer in [] in unpack
2775
2db62bbc 2776(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2777are permitted. See L<perlfunc/pack>.
2778
6df41af2
GS
2779=item Malformed PERLLIB_PREFIX
2780
2781(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
2782
2783 prefix1;prefix2
2784
2785or
6df41af2
GS
2786 prefix1 prefix2
2787
be771a83
GS
2788with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of
2789a builtin library search path, prefix2 is substituted. The error may
2790appear if components are not found, or are too long. See
fecfaeb8 2791"PERLLIB_PREFIX" in L<perlos2>.
6df41af2 2792
2f758a16
ST
2793=item Malformed prototype for %s: %s
2794
d37a9538
ST
2795(F) You tried to use a function with a malformed prototype. The
2796syntax of function prototypes is given a brief compile-time check for
2797obvious errors like invalid characters. A more rigorous check is run
2798when the function is called.
2f758a16 2799
ba210ebe
JH
2800=item Malformed UTF-8 character (%s)
2801
4d6f11e5 2802(S utf8)(F) Perl detected a string that didn't comply with UTF-8
2575c402 2803encoding rules, even though it had the UTF8 flag on.
ba210ebe 2804
2575c402
JW
2805One possible cause is that you set the UTF8 flag yourself for data that
2806you thought to be in UTF-8 but it wasn't (it was for example legacy
6903afa2 28078-bit data). To guard against this, you can use Encode::decode_utf8.
2575c402
JW
2808
2809If you use the C<:encoding(UTF-8)> PerlIO layer for input, invalid byte
2810sequences are handled gracefully, but if you use C<:utf8>, the flag is
2811set without validating the data, possibly resulting in this error
2812message.
2813
2814See also L<Encode/"Handling Malformed Data">.
901b21bf 2815
107160e2
KW
2816=item Malformed UTF-8 character immediately after '%s'
2817
2818(F) You said C<use utf8>, but the program file doesn't comply with UTF-8
2819encoding rules. The message prints out the properly encoded characters
2820just before the first bad one. If C<utf8> warnings are enabled, a
2821warning is generated that gives more details about the type of
2822malformation.
2823
bde9e88d 2824=item Malformed UTF-8 returned by \N{%s} immediately after '%s'
ff3f963a
KW
2825
2826(F) The charnames handler returned malformed UTF-8.
2827
4a5d3a93
FC
2828=item Malformed UTF-8 string in '%c' format in unpack
2829
2830(F) You tried to unpack something that didn't comply with UTF-8 encoding
2831rules and perl was unable to guess how to make more progress.
2832
f337b084
TH
2833=item Malformed UTF-8 string in pack
2834
2835(F) You tried to pack something that didn't comply with UTF-8 encoding
2836rules and perl was unable to guess how to make more progress.
2837
2838=item Malformed UTF-8 string in unpack
2839
2840(F) You tried to unpack something that didn't comply with UTF-8 encoding
2841rules and perl was unable to guess how to make more progress.
2842
4a5d3a93 2843=item Malformed UTF-16 surrogate
f337b084 2844
4a5d3a93
FC
2845(F) Perl thought it was reading UTF-16 encoded character data but while
2846doing it Perl met a malformed Unicode surrogate.
2847
2848=item %s matches null string many times in regex; marked by <-- HERE in m/%s/
2849
2850(W regexp) The pattern you've specified would be an infinite loop if the
2851regular expression engine didn't specifically check for that. The <-- HERE
9e3ec65c 2852shows whereabouts in the regular expression the problem was discovered.
4a5d3a93 2853See L<perlre>.
f337b084 2854
de42a5a9 2855=item Maximal count of pending signals (%u) exceeded
2563cec5 2856
6903afa2 2857(F) Perl aborted due to too high a number of signals pending. This
2563cec5
IZ
2858usually indicates that your operating system tried to deliver signals
2859too fast (with a very high priority), starving the perl process from
2860resources it would need to reach a point where it can process signals
6903afa2 2861safely. (See L<perlipc/"Deferred Signals (Safe Signals)">.)
2563cec5 2862
25f58aea
PN
2863=item "%s" may clash with future reserved word
2864
2865(W) This warning may be due to running a perl5 script through a perl4
2866interpreter, especially if the word that is being warned about is
2867"use" or "my".
2868
0d2487cd 2869=item '%' may not be used in pack
6df41af2
GS
2870
2871(F) You can't pack a string by supplying a checksum, because the
be771a83
GS
2872checksumming process loses information, and you can't go the other way.
2873See L<perlfunc/unpack>.
6df41af2 2874
a0d0e21e
LW
2875=item Method for operation %s not found in package %s during blessing
2876
2877(F) An attempt was made to specify an entry in an overloading table that
e7ea3e70 2878doesn't resolve to a valid subroutine. See L<overload>.
a0d0e21e 2879
3cdd684c
TP
2880=item Method %s not permitted
2881
2882See Server error.
2883
a0d0e21e
LW
2884=item Might be a runaway multi-line %s string starting on line %d
2885
2886(S) An advisory indicating that the previous error may have been caused
2887by a missing delimiter on a string or pattern, because it eventually
2888ended earlier on the current line.
2889
2890=item Misplaced _ in number
2891
d4ced10d
JH
2892(W syntax) An underscore (underbar) in a numeric constant did not
2893separate two digits.
a0d0e21e 2894
7baa4690
HS
2895=item Missing argument in %s
2896
2897(W uninitialized) A printf-type format required more arguments than were
2898supplied.
2899
9e81e6a1
RGS
2900=item Missing argument to -%c
2901
2902(F) The argument to the indicated command line switch must follow
2903immediately after the switch, without intervening spaces.
2904
ff3f963a 2905=item Missing braces on \N{}
423cee85 2906
aec0ef10
FC
2907=item Missing braces on \N{} in regex; marked by <-- HERE in m/%s/
2908
4a2d328f 2909(F) Wrong syntax of character name literal C<\N{charname}> within
532cb70d
FC
2910double-quotish context. This can also happen when there is a space
2911(or comment) between the C<\N> and the C<{> in a regex with the C</x> modifier.
2912This modifier does not change the requirement that the brace immediately
2913follow the C<\N>.
423cee85 2914
f0a2b745
KW
2915=item Missing braces on \o{}
2916
2917(F) A C<\o> must be followed immediately by a C<{> in double-quotish context.
2918
a0d0e21e
LW
2919=item Missing comma after first argument to %s function
2920
2921(F) While certain functions allow you to specify a filehandle or an
2922"indirect object" before the argument list, this ain't one of them.
2923
06eaf0bc
GS
2924=item Missing command in piped open
2925
be771a83
GS
2926(W pipe) You used the C<open(FH, "| command")> or
2927C<open(FH, "command |")> construction, but the command was missing or
2928blank.
06eaf0bc 2929
961ce445
RGS
2930=item Missing control char name in \c
2931
2932(F) A double-quoted string ended with "\c", without the required control
2933character name.
2934
8767b1ab 2935=item Missing name in "%s sub"
6df41af2 2936
be771a83
GS
2937(F) The reserved syntax for lexically scoped subroutines requires that
2938they have a name with which they can be found.
6df41af2
GS
2939
2940=item Missing $ on loop variable
2941
be771a83
GS
2942(F) Apparently you've been programming in B<csh> too much. Variables
2943are always mentioned with the $ in Perl, unlike in the shells, where it
2944can vary from one line to the next.
6df41af2 2945
cc507455 2946=item (Missing operator before %s?)
748a9306 2947
56da5a46
RGS
2948(S syntax) This is an educated guess made in conjunction with the message
2949"%s found where operator expected". Often the missing operator is a comma.
748a9306 2950
aec0ef10 2951=item Missing right brace on \%c{} in regex; marked by <-- HERE in m/%s/
ab13f0c7 2952
ff3f963a
KW
2953(F) Missing right brace in C<\x{...}>, C<\p{...}>, C<\P{...}>, or C<\N{...}>.
2954
4a68bf9d 2955=item Missing right brace on \N{} or unescaped left brace after \N
ff3f963a 2956
d32207c9
FC
2957(F) C<\N> has two meanings.
2958
2959The traditional one has it followed by a name enclosed in braces,
2960meaning the character (or sequence of characters) given by that
fa816bf3 2961name. Thus C<\N{ASTERISK}> is another way of writing C<*>, valid in both
d32207c9
FC
2962double-quoted strings and regular expression patterns. In patterns,
2963it doesn't have the meaning an unescaped C<*> does.
2964
2965Starting in Perl 5.12.0, C<\N> also can have an additional meaning (only)
2966in patterns, namely to match a non-newline character. (This is short
2967for C<[^\n]>, and like C<.> but is not affected by the C</s> regex modifier.)
2968
2969This can lead to some ambiguities. When C<\N> is not followed immediately
2970by a left brace, Perl assumes the C<[^\n]> meaning. Also, if the braces
2971form a valid quantifier such as C<\N{3}> or C<\N{5,}>, Perl assumes that this
2972means to match the given quantity of non-newlines (in these examples,
29733; and 5 or more, respectively). In all other case, where there is a
2974C<\N{> and a matching C<}>, Perl assumes that a character name is desired.
2975
2976However, if there is no matching C<}>, Perl doesn't know if it was
2977mistakenly omitted, or if C<[^\n]{> was desired, and raises this error.
2978If you meant the former, add the right brace; if you meant the latter,
2979escape the brace with a backslash, like so: C<\N\{>
ab13f0c7 2980
d98d5fff 2981=item Missing right curly or square bracket
a0d0e21e 2982
be771a83
GS
2983(F) The lexer counted more opening curly or square brackets than closing
2984ones. As a general rule, you'll find it's missing near the place you
2985were last editing.
a0d0e21e 2986
6df41af2
GS
2987=item (Missing semicolon on previous line?)
2988
56da5a46
RGS
2989(S syntax) This is an educated guess made in conjunction with the message
2990"%s found where operator expected". Don't automatically put a semicolon on
6df41af2
GS
2991the previous line just because you saw this message.
2992
a0d0e21e
LW
2993=item Modification of a read-only value attempted
2994
2995(F) You tried, directly or indirectly, to change the value of a
5f05dabc 2996constant. You didn't, of course, try "2 = 1", because the compiler
a0d0e21e
LW
2997catches that. But an easy way to do the same thing is:
2998
2999 sub mod { $_[0] = 1 }
3000 mod(2);
3001
3002Another way is to assign to a substr() that's off the end of the string.
3003
c5674021
PDF
3004Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR>
3005is aliased to a constant in the look I<LIST>:
3006
b7e4ecc1
FC
3007 $x = 1;
3008 foreach my $n ($x, 2) {
3009 $n *= 2; # modifies the $x, but fails on attempt to
3010 } # modify the 2
c5674021 3011
7a4340ed 3012=item Modification of non-creatable array value attempted, %s
a0d0e21e
LW
3013
3014(F) You tried to make an array value spring into existence, and the
3015subscript was probably negative, even counting from end of the array
3016backwards.
3017
7a4340ed 3018=item Modification of non-creatable hash value attempted, %s
a0d0e21e 3019
be771a83
GS
3020(P) You tried to make a hash value spring into existence, and it
3021couldn't be created for some peculiar reason.
a0d0e21e
LW
3022
3023=item Module name must be constant
3024
3025(F) Only a bare module name is allowed as the first argument to a "use".
3026
be98fb35 3027=item Module name required with -%c option
6df41af2 3028
be98fb35
GS
3029(F) The C<-M> or C<-m> options say that Perl should load some module, but
3030you omitted the name of the module. Consult L<perlrun> for full details
3031about C<-M> and C<-m>.
6df41af2 3032
fe13d51d 3033=item More than one argument to '%s' open
ed9aa3b7 3034
6903afa2 3035(F) The C<open> function has been asked to open multiple files. This
ed9aa3b7
SG
3036can happen if you are trying to open a pipe to a command that takes a
3037list of arguments, but have forgotten to specify a piped open mode.
3038See L<perlfunc/open> for details.
3039
a0d0e21e
LW
3040=item msg%s not implemented
3041
3042(F) You don't have System V message IPC on your system.
3043
3044=item Multidimensional syntax %s not supported
3045
75b44862
GS
3046(W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>.
3047They're written like C<$foo[1][2][3]>, as in C.
8b1a09fc 3048
49704364 3049=item '/' must follow a numeric type in unpack
6df41af2 3050
49704364
LW
3051(F) You had an unpack template that contained a '/', but this did not
3052follow some unpack specification producing a numeric value.
3053See L<perlfunc/pack>.
6df41af2
GS
3054
3055=item "my sub" not yet implemented
3056
be771a83
GS
3057(F) Lexically scoped subroutines are not yet implemented. Don't try
3058that yet.
6df41af2 3059
5a25739d
FC
3060=item "my %s" used in sort comparison
3061
3062(W syntax) The package variables $a and $b are used for sort comparisons.
3063You used $a or $b in as an operand to the C<< <=> >> or C<cmp> operator inside a
3064sort comparison block, and the variable had earlier been declared as a
3065lexical variable. Either qualify the sort variable with the package
3066name, or rename the lexical variable.
3067
fd1b7234 3068=item "my" variable %s can't be in a package
6df41af2 3069
be771a83
GS
3070(F) Lexically scoped variables aren't in a package, so it doesn't make
3071sense to try to declare one with a package qualifier on the front. Use
3072local() if you want to localize a package variable.
09bef843 3073
8149aa9f
FC
3074=item Name "%s::%s" used only once: possible typo
3075
3076(W once) Typographical errors often show up as unique variable names.
3077If you had a good reason for having a unique name, then just mention it
3078again somehow to suppress the message. The C<our> declaration is
3079provided for this purpose.
3080
3081NOTE: This warning detects symbols that have been used only once so $c, @c,
3082%c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered
3083the same; if a program uses $c only once but also uses any of the others it
3084will not trigger this warning.
3085
0d0b4b3b
KW
3086=item Need exactly 3 octal digits in regex; marked by <-- HERE in m/%s/
3087
3088(F) Within S<C<(?[ ])>>, all constants interpreted as octal need to be
3089exactly 3 digits long. This helps catch some ambiguities. If your
3090constant is too short, add leading zeros, like
3091
3092 (?[ [ \078 ] ]) # Syntax error!
3093 (?[ [ \0078 ] ]) # Works
3094 (?[ [ \007 8 ] ]) # Clearer
3095
3096The maximum number this construct can express is C<\777>. If you
675fa9ff
FC
3097need a larger one, you need to use L<\o{}|perlrebackslash/Octal escapes> instead. If you meant
3098two separate things, you need to separate them:
0d0b4b3b
KW
3099
3100 (?[ [ \7776 ] ]) # Syntax error!
3101 (?[ [ \o{7776} ] ]) # One meaning
3102 (?[ [ \777 6 ] ]) # Another meaning
3103 (?[ [ \777 \006 ] ]) # Still another
3104
49704364
LW
3105=item Negative '/' count in unpack
3106
3107(F) The length count obtained from a length/code unpack operation was
3108negative. See L<perlfunc/pack>.
3109
a0d0e21e
LW
3110=item Negative length
3111
be771a83
GS
3112(F) You tried to do a read/write/send/recv operation with a buffer
3113length that is less than 0. This is difficult to imagine.
a0d0e21e 3114
ed9aa3b7
SG
3115=item Negative offset to vec in lvalue context
3116
3117(F) When C<vec> is called in an lvalue context, the second argument must be
3118greater than or equal to zero.
3119
7253e4e3 3120=item Nested quantifiers in regex; marked by <-- HERE in m/%s/
a0d0e21e 3121
6903afa2 3122(F) You can't quantify a quantifier without intervening parentheses.
9e3ec65c
FC
3123So things like ** or +* or ?* are illegal. The <-- HERE shows
3124whereabouts in the regular expression the problem was discovered.
a0d0e21e 3125
7253e4e3 3126Note that the minimal matching quantifiers, C<*?>, C<+?>, and
be771a83 3127C<??> appear to be nested quantifiers, but aren't. See L<perlre>.
a0d0e21e 3128
6df41af2 3129=item %s never introduced
a0d0e21e 3130
be771a83
GS
3131(S internal) The symbol in question was declared but somehow went out of
3132scope before it could possibly have been used.
a0d0e21e 3133
2c7d6b9c
RGS
3134=item next::method/next::can/maybe::next::method cannot find enclosing method
3135
3136(F) C<next::method> needs to be called within the context of a
3137real method in a real package, and it could not find such a context.
3138See L<mro>.
3139
5a25739d
FC
3140=item \N in a character class must be a named character: \N{...} in regex;
3141marked by <-- HERE in m/%s/
3142
3143(F) The new (5.12) meaning of C<\N> as C<[^\n]> is not valid in
3144a bracketed character class, for the same reason that C<.> in
3145a character class loses its specialness: it matches almost
3146everything, which is probably not what you want.
3147
3148=item \N{NAME} must be resolved by the lexer in regex; marked by <-- HERE in m/%s/
3149
3150(F) When compiling a regex pattern, an unresolved named character or
3151sequence was encountered. This can happen in any of several ways that
3152bypass the lexer, such as using single-quotish context, or an extra
3153backslash in double-quotish:
3154
3155 $re = '\N{SPACE}'; # Wrong!
3156 $re = "\\N{SPACE}"; # Wrong!
3157 /$re/;
3158
3159Instead, use double-quotes with a single backslash:
3160
3161 $re = "\N{SPACE}"; # ok
3162 /$re/;
3163
3164The lexer can be bypassed as well by creating the pattern from smaller
3165components:
3166
3167 $re = '\N';
3168 /${re}{SPACE}/; # Wrong!
3169
3170It's not a good idea to split a construct in the middle like this, and
3171it doesn't work here. Instead use the solution above.
3172
3173Finally, the message also can happen under the C</x> regex modifier when the
3174C<\N> is separated by spaces from the C<{>, in which case, remove the spaces.
3175
3176 /\N {SPACE}/x; # Wrong!
3177 /\N{SPACE}/x; # ok
3178
a0d0e21e
LW
3179=item No %s allowed while running setuid
3180
be771a83
GS
3181(F) Certain operations are deemed to be too insecure for a setuid or
3182setgid script to even be allowed to attempt. Generally speaking there
3183will be another way to do what you want that is, if not secure, at least
3184securable. See L<perlsec>.
a0d0e21e 3185
6651ba0b
FC
3186=item No code specified for -%c
3187
3188(F) Perl's B<-e> and B<-E> command-line options require an argument. If
3189you want to run an empty program, pass the empty string as a separate
3190argument or run a program consisting of a single 0 or 1:
3191
3192 perl -e ""
3193 perl -e0
3194 perl -e1
3195
a0d0e21e
LW
3196=item No comma allowed after %s
3197
6903afa2
FC
3198(F) A list operator that has a filehandle or "indirect object" is
3199not allowed to have a comma between that and the following arguments.
a0d0e21e
LW
3200Otherwise it'd be just another one of the arguments.
3201
6903afa2
FC
3202One possible cause for this is that you expected to have imported
3203a constant to your name space with B<use> or B<import> while no such
3204importing took place, it may for example be that your operating
3205system does not support that particular constant. Hopefully you did
3206use an explicit import list for the constants you expect to see;
3207please see L<perlfunc/use> and L<perlfunc/import>. While an
3208explicit import list would probably have caught this error earlier
3209it naturally does not remedy the fact that your operating system
3210still does not support that constant. Maybe you have a typo in
3211the constants of the symbol import list of B<use> or B<import> or in the
3212constant name at the line where this error was triggered?
0a753a76 3213
748a9306
LW
3214=item No command into which to pipe on command line
3215
be771a83
GS
3216(F) An error peculiar to VMS. Perl handles its own command line
3217redirection, and found a '|' at the end of the command line, so it
3218doesn't know where you want to pipe the output from this command.
748a9306 3219
a0d0e21e
LW
3220=item No DB::DB routine defined
3221
be771a83 3222(F) The currently executing code was compiled with the B<-d> switch, but
f7af5ce1 3223for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
ccafdc96
RGS
3224module) didn't define a routine to be called at the beginning of each
3225statement.
a0d0e21e
LW
3226
3227=item No dbm on this machine
3228
3229(P) This is counted as an internal error, because every machine should
5f05dabc 3230supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
a0d0e21e 3231
ccafdc96 3232=item No DB::sub routine defined
a0d0e21e 3233
ccafdc96
RGS
3234(F) The currently executing code was compiled with the B<-d> switch, but
3235for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
3236module) didn't define a C<DB::sub> routine to be called at the beginning
3237of each ordinary subroutine call.
a0d0e21e 3238
6651ba0b
FC
3239=item No directory specified for -I
3240
3241(F) The B<-I> command-line switch requires a directory name as part of the
3242I<same> argument. Use B<-Ilib>, for instance. B<-I lib> won't work.
3243
c47ff5f1 3244=item No error file after 2> or 2>> on command line
748a9306 3245
be771a83
GS
3246(F) An error peculiar to VMS. Perl handles its own command line
3247redirection, and found a '2>' or a '2>>' on the command line, but can't
3248find the name of the file to which to write data destined for stderr.
748a9306 3249
49704364
LW
3250=item No group ending character '%c' found in template
3251
3252(F) A pack or unpack template has an opening '(' or '[' without its
6903afa2 3253matching counterpart. See L<perlfunc/pack>.
49704364 3254
c47ff5f1 3255=item No input file after < on command line
748a9306 3256
be771a83
GS
3257(F) An error peculiar to VMS. Perl handles its own command line
3258redirection, and found a '<' on the command line, but can't find the
3259name of the file from which to read data for stdin.
748a9306 3260
2c7d6b9c
RGS
3261=item No next::method '%s' found for %s
3262
3263(F) C<next::method> found no further instances of this method name
3264in the remaining packages of the MRO of this class. If you don't want
3265it throwing an exception, use C<maybe::next::method>
fa816bf3 3266or C<next::can>. See L<mro>.
2c7d6b9c 3267
675fa9ff
FC
3268=item Non-hex character in regex; marked by <-- HERE in m/%s/
3269
3270(F) In a regular expression, there was a non-hexadecimal character where
3271a hex one was expected, like
3272
3273 (?[ [ \xDG ] ])
3274 (?[ [ \x{DEKA} ] ])
3275
3276=item Non-octal character in regex; marked by <-- HERE in m/%s/
3277
3278(F) In a regular expression, there was a non-octal character where
3279an octal one was expected, like
3280
3281 (?[ [ \o{1278} ] ])
3282
3283=item Non-octal character '%c'. Resolved as "%s"
3284
3285(W digit) In parsing an octal numeric constant, a character was
3286unexpectedly encountered that isn't octal. The resulting value
3287is as indicated.
3288
6df41af2
GS
3289=item "no" not allowed in expression
3290
be771a83
GS
3291(F) The "no" keyword is recognized and executed at compile time, and
3292returns no useful value. See L<perlmod>.
6df41af2 3293
675fa9ff
FC
3294=item Non-string passed as bitmask
3295
3296(W misc) A number has been passed as a bitmask argument to select().
3297Use the vec() function to construct the file descriptor bitmasks for
3298select. See L<perlfunc/select>.
3299
c47ff5f1 3300=item No output file after > on command line
748a9306 3301
be771a83
GS
3302(F) An error peculiar to VMS. Perl handles its own command line
3303redirection, and found a lone '>' at the end of the command line, so it
3304doesn't know where you wanted to redirect stdout.
748a9306 3305
c47ff5f1 3306=item No output file after > or >> on command line
748a9306 3307
be771a83
GS
3308(F) An error peculiar to VMS. Perl handles its own command line
3309redirection, and found a '>' or a '>>' on the command line, but can't
3310find the name of the file to which to write data destined for stdout.
748a9306 3311
1ec3e8de
GS
3312=item No package name allowed for variable %s in "our"
3313
be771a83
GS
3314(F) Fully qualified variable names are not allowed in "our"
3315declarations, because that doesn't make much sense under existing
3316semantics. Such syntax is reserved for future e