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Remove buggy loop-based byte swapping code.
[perl5.git] / pod / perldiag.pod
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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
d8225693
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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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FC
95bitwise and, and multiplication) I<and> initial special characters
96(denoting hashes, subroutines and typeglobs), and you said something
97like C<*foo * foo> that might be interpreted as either of them. We
98assumed you meant the infix operator, but please try to make it more
99clear -- in the example given, you might write C<*foo * foo()> if you
100really meant to multiply a glob by the result of calling a function.
d8225693 101
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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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FC
134string C<"-foo">, or a call to the function C<foo>, negated. If you meant
135the string, just write C<"-foo">. If you meant the function call,
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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
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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
7a95317d
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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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GS
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
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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
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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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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.
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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
be771a83
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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
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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
4dcecea4 556copiable.
4633a7c4 557
f675dbe5
CB
558=item Buffer overflow in prime_env_iter: %s
559
be771a83
GS
560(W internal) A warning peculiar to VMS. While Perl was preparing to
561iterate over %ENV, it encountered a logical name or symbol definition
562which was too long, so it was truncated to the string shown.
f675dbe5 563
7fcfef4d
FC
564=item Bizarre SvTYPE [%d]
565
566(P) When starting a new thread or return values from a thread, Perl
567encountered an invalid data type.
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
9850bf21 885=item Can't goto subroutine from a sort sub (or similar callback)
cd299c6e 886
9850bf21
RH
887(F) The "goto subroutine" call can't be used to jump out of the
888comparison sub for a sort(), or from a similar callback (such
889as the reduce() function in List::Util).
890
c74ace89 891=item Can't goto subroutine from an eval-%s
b150fb22 892
be771a83 893(F) The "goto subroutine" call can't be used to jump out of an eval
c74ace89 894"string" or block.
b150fb22 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.
c9faaf04 1314It is planned to make this fatal in all instances in Perl v5.20. In the
17a3df4c
KW
1315cases where it isn't fatal, the character this evaluates to is
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
TH
1336=item Character in 'W' format wrapped in pack
1337
1338(W pack) You said
1339
1340 pack("U0W", $x)
1341
6903afa2
FC
1342where $x is either less than 0 or more than 255. However, C<U0>-mode
1343expects all values to fall in the interval [0, 255], so Perl behaved
1344as if you meant:
f337b084
TH
1345
1346 pack("U0W", $x & 255)
1347
1348=item Character in 'c' format wrapped in pack
ac7cd81a
SC
1349
1350(W pack) You said
1351
1352 pack("c", $x)
1353
1354where $x is either less than -128 or more than 127; the C<"c"> format
1355is only for encoding native operating system characters (ASCII, EBCDIC,
1356and so on) and not for Unicode characters, so Perl behaved as if you meant
1357
1358 pack("c", $x & 255);
1359
1360If you actually want to pack Unicode codepoints, use the C<"U"> format
1361instead.
1362
f337b084
TH
1363=item Character in '%c' format wrapped in unpack
1364
1365(W unpack) You tried something like
1366
1367 unpack("H", "\x{2a1}")
1368
1a147d38 1369where the format expects to process a byte (a character with a value
6903afa2
FC
1370below 256), but a higher value was provided instead. Perl uses the
1371value modulus 256 instead, as if you had provided:
f337b084
TH
1372
1373 unpack("H", "\x{a1}")
1374
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
96ebfdd7
RK
1418=item close() on unopened filehandle %s
1419
1420(W unopened) You tried to close a filehandle that was never opened.
1421
abc7ecad
SP
1422=item closedir() attempted on invalid dirhandle %s
1423
1424(W io) The dirhandle you tried to close is either closed or not really
1425a dirhandle. Check your control flow.
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
0876b9a0
KW
1438=item Code point 0x%X is not Unicode, may not be portable
1439
6fbc9859
MH
1440=item Code point 0x%X is not Unicode, all \p{} matches fail; all \P{} matches
1441succeed
9ae3ac1a 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
1540=item Constant(%s) unknown
6df41af2 1541
be771a83
GS
1542(F) The parser found inconsistencies either while attempting to define
1543an overloaded constant, or when trying to find the character name
1544specified in the C<\N{...}> escape. Perhaps you forgot to load the
fbb93542 1545corresponding L<overload> pragma?.
6df41af2 1546
779c5bc9
GS
1547=item Constant is not %s reference
1548
1549(F) A constant value (perhaps declared using the C<use constant> pragma)
be771a83 1550is being dereferenced, but it amounts to the wrong type of reference.
6903afa2 1551The message indicates the type of reference that was expected. This
be771a83 1552usually indicates a syntax error in dereferencing the constant value.
779c5bc9
GS
1553See L<perlsub/"Constant Functions"> and L<constant>.
1554
4cee8e80
CS
1555=item Constant subroutine %s redefined
1556
aeb94125
FC
1557(W redefine)(S) You redefined a subroutine which had previously
1558been eligible for inlining. See L<perlsub/"Constant Functions">
1559for commentary and workarounds.
4cee8e80 1560
9607fc9c
PP
1561=item Constant subroutine %s undefined
1562
be771a83
GS
1563(W misc) You undefined a subroutine which had previously been eligible
1564for inlining. See L<perlsub/"Constant Functions"> for commentary and
1565workarounds.
9607fc9c 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
a0d0e21e
LW
1586=item corrupted regexp pointers
1587
1588(P) The regular expression engine got confused by what the regular
1589expression compiler gave it.
1590
1591=item corrupted regexp program
1592
be771a83
GS
1593(P) The regular expression engine got passed a regexp program without a
1594valid magic number.
a0d0e21e 1595
de42a5a9 1596=item Corrupt malloc ptr 0x%x at 0x%x
6df41af2
GS
1597
1598(P) The malloc package that comes with Perl had an internal failure.
1599
c608e803
KW
1600=item Corrupted regexp opcode %d > %d
1601
1602(F)
1603This is either an error in Perl, or, if you're using one, your
1604L<custom regular expression engine|perlreapi>. If not the latter,
1605report the problem through the L<perlbug> utility.
1606
49704364
LW
1607=item Count after length/code in unpack
1608
1609(F) You had an unpack template indicating a counted-length string, but
1610you have also specified an explicit size for the string. See
1611L<perlfunc/pack>.
1612
6651ba0b
FC
1613=item Deep recursion on anonymous subroutine
1614
a0d0e21e
LW
1615=item Deep recursion on subroutine "%s"
1616
be771a83
GS
1617(W recursion) This subroutine has called itself (directly or indirectly)
1618100 times more than it has returned. This probably indicates an
1619infinite recursion, unless you're writing strange benchmark programs, in
1620which case it indicates something else.
a0d0e21e 1621
aad1d01f
NC
1622This threshold can be changed from 100, by recompiling the F<perl> binary,
1623setting the C pre-processor macro C<PERL_SUB_DEPTH_WARN> to the desired value.
1624
f10b0346 1625=item defined(@array) is deprecated
69794302 1626
be771a83
GS
1627(D deprecated) defined() is not usually useful on arrays because it
1628checks for an undefined I<scalar> value. If you want to see if the
64977eb6 1629array is empty, just use C<if (@array) { # not empty }> for example.
69794302 1630
f10b0346 1631=item defined(%hash) is deprecated
69794302 1632
f0ec9725
KR
1633(D deprecated) C<defined()> is not usually right on hashes and has been
1634discouraged since 5.004.
1635
1636Although C<defined %hash> is false on a plain not-yet-used hash, it
1637becomes true in several non-obvious circumstances, including iterators,
1638weak references, stash names, even remaining true after C<undef %hash>.
1639These things make C<defined %hash> fairly useless in practice.
1640
1641If a check for non-empty is what you wanted then just put it in boolean
1642context (see L<perldata/Scalar values>):
16546e45
KR
1643
1644 if (%hash) {
1645 # not empty
1646 }
1647
f0ec9725
KR
1648If you had C<defined %Foo::Bar::QUUX> to check whether such a package
1649variable exists then that's never really been reliable, and isn't
1650a good way to enquire about the features of a package, or whether
1651it's loaded, etc.
1652
69794302 1653
6fbc9859
MH
1654=item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in
1655m/%s/
bcb95744 1656
6903afa2 1657(F) You used something like C<(?(DEFINE)...|..)> which is illegal. The
bcb95744
FC
1658most likely cause of this error is that you left out a parenthesis inside
1659of the C<....> part.
1660
9e3ec65c 1661The <-- HERE shows whereabouts in the regular expression the problem was
bcb95744
FC
1662discovered.
1663
62658f4d
PM
1664=item %s defines neither package nor VERSION--version check failed
1665
1666(F) You said something like "use Module 42" but in the Module file
1667there are neither package declarations nor a C<$VERSION>.
1668
fc36a67e
PP
1669=item Delimiter for here document is too long
1670
be771a83
GS
1671(F) In a here document construct like C<<<FOO>, the label C<FOO> is too
1672long for Perl to handle. You have to be seriously twisted to write code
1673that triggers this error.
fc36a67e 1674
6d3b25aa
RGS
1675=item Deprecated use of my() in false conditional
1676
fa816bf3
FC
1677(D deprecated) You used a declaration similar to C<my $x if 0>. There
1678has been a long-standing bug in Perl that causes a lexical variable
6d3b25aa 1679not to be cleared at scope exit when its declaration includes a false
6903afa2 1680conditional. Some people have exploited this bug to achieve a kind of
fa816bf3 1681static variable. Since we intend to fix this bug, we don't want people
6903afa2 1682relying on this behavior. You can achieve a similar static effect by
6d3b25aa 1683declaring the variable in a separate block outside the function, eg
36fb85f3 1684
6d3b25aa
RGS
1685 sub f { my $x if 0; return $x++ }
1686
1687becomes
1688
1689 { my $x; sub f { return $x++ } }
1690
fa816bf3
FC
1691Beginning with perl 5.9.4, you can also use C<state> variables to have
1692lexicals that are initialized only once (see L<feature>):
36fb85f3
RGS
1693
1694 sub f { state $x; return $x++ }
1695
500ab966
RGS
1696=item DESTROY created new reference to dead object '%s'
1697
1698(F) A DESTROY() method created a new reference to the object which is
6903afa2
FC
1699just being DESTROYed. Perl is confused, and prefers to abort rather
1700than to create a dangling reference.
500ab966 1701
3cdd684c
TP
1702=item Did not produce a valid header
1703
1704See Server error.
1705
6df41af2
GS
1706=item %s did not return a true value
1707
1708(F) A required (or used) file must return a true value to indicate that
1709it compiled correctly and ran its initialization code correctly. It's
1710traditional to end such a file with a "1;", though any true value would
1711do. See L<perlfunc/require>.
1712
cc507455 1713=item (Did you mean &%s instead?)
4633a7c4 1714
413ff9f6
FC
1715(W misc) You probably referred to an imported subroutine &FOO as $FOO or
1716some such.
4633a7c4 1717
cc507455 1718=item (Did you mean "local" instead of "our"?)
33633739 1719
be771a83
GS
1720(W misc) Remember that "our" does not localize the declared global
1721variable. You have declared it again in the same lexical scope, which
1722seems superfluous.
33633739 1723
cc507455 1724=item (Did you mean $ or @ instead of %?)
a0d0e21e 1725
be771a83
GS
1726(W) You probably said %hash{$key} when you meant $hash{$key} or
1727@hash{@keys}. On the other hand, maybe you just meant %hash and got
1728carried away.
748a9306 1729
7e1af8bc 1730=item Died
5f05dabc
PP
1731
1732(F) You passed die() an empty string (the equivalent of C<die "">) or
075b00aa 1733you called it with no args and C<$@> was empty.
5f05dabc 1734
3cdd684c
TP
1735=item Document contains no data
1736
1737See Server error.
1738
62658f4d
PM
1739=item %s does not define %s::VERSION--version check failed
1740
1741(F) You said something like "use Module 42" but the Module did not
943fc58e 1742define a C<$VERSION>.
62658f4d 1743
49704364
LW
1744=item '/' does not take a repeat count
1745
1746(F) You cannot put a repeat count of any kind right after the '/' code.
1747See L<perlfunc/pack>.
1748
a0d0e21e
LW
1749=item Don't know how to handle magic of type '%s'
1750
1751(P) The internal handling of magical variables has been cursed.
1752
1753=item do_study: out of memory
1754
1755(P) This should have been caught by safemalloc() instead.
1756
6df41af2
GS
1757=item (Do you need to predeclare %s?)
1758
56da5a46
RGS
1759(S syntax) This is an educated guess made in conjunction with the message
1760"%s found where operator expected". It often means a subroutine or module
6df41af2
GS
1761name is being referenced that hasn't been declared yet. This may be
1762because of ordering problems in your file, or because of a missing
be771a83
GS
1763"sub", "package", "require", or "use" statement. If you're referencing
1764something that isn't defined yet, you don't actually have to define the
1765subroutine or package before the current location. You can use an empty
1766"sub foo;" or "package FOO;" to enter a "forward" declaration.
6df41af2 1767
ac206dc8
RGS
1768=item dump() better written as CORE::dump()
1769
1770(W misc) You used the obsolescent C<dump()> built-in function, without fully
1771qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>.
1772
84d78eb7
YO
1773=item dump is not supported
1774
1775(F) Your machine doesn't support dump/undump.
1776
a0d0e21e
LW
1777=item Duplicate free() ignored
1778
be771a83
GS
1779(S malloc) An internal routine called free() on something that had
1780already been freed.
a0d0e21e 1781
1109a392
MHM
1782=item Duplicate modifier '%c' after '%c' in %s
1783
35f0cd76
FC
1784(W unpack) You have applied the same modifier more than once after a
1785type in a pack template. See L<perlfunc/pack>.
1109a392 1786
4633a7c4
LW
1787=item elseif should be elsif
1788
fa816bf3
FC
1789(S syntax) There is no keyword "elseif" in Perl because Larry thinks
1790it's ugly. Your code will be interpreted as an attempt to call a method
1791named "elseif" for the class returned by the following block. This is
4633a7c4
LW
1792unlikely to be what you want.
1793
c608e803 1794=item Empty \%c{} in regex; marked by <-- HERE in m/%s/
ab13f0c7 1795
af6f566e 1796(F) C<\p> and C<\P> are used to introduce a named Unicode property, as
6903afa2 1797described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in
af6f566e 1798a regular expression without specifying the property name.
ab13f0c7 1799
85ab1d1d 1800=item entering effective %s failed
5ff3f7a4 1801
85ab1d1d 1802(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1803effective uids or gids failed.
1804
c038024b
RGS
1805=item %ENV is aliased to %s
1806
1807(F) You're running under taint mode, and the C<%ENV> variable has been
1808aliased to another hash, so it doesn't reflect anymore the state of the
6903afa2 1809program's environment. This is potentially insecure.
c038024b 1810
748a9306
LW
1811=item Error converting file specification %s
1812
5f05dabc 1813(F) An error peculiar to VMS. Because Perl may have to deal with file
748a9306 1814specifications in either VMS or Unix syntax, it converts them to a
be771a83
GS
1815single form when it must operate on them directly. Either you've passed
1816an invalid file specification to Perl, or you've found a case the
1817conversion routines don't handle. Drat.
748a9306 1818
ff56e4f1
KW
1819=item Escape literal pattern white space under /x
1820
1821(D deprecated) You compiled a regular expression pattern with C</x> to
1822ignore white space, and you used, as a literal, one of the characters
1823that Perl plans to eventually treat as white space. The character must
1824be escaped somehow, or it will work differently on a future Perl that
1825does treat it as white space. The easiest way is to insert a backslash
1826immediately before it, or to enclose it with square brackets. This
1827change is to bring Perl into conformance with Unicode recommendations.
1828Here are the five characters that generate this warning:
1829U+0085 NEXT LINE,
1830U+200E LEFT-TO-RIGHT MARK,
1831U+200F RIGHT-TO-LEFT MARK,
1832U+2028 LINE SEPARATOR,
1833and
1834U+2029 PARAGRAPH SEPARATOR.
1835
ad19ef22 1836=item Eval-group in insecure regular expression
e4d48cc9 1837
be771a83
GS
1838(F) Perl detected tainted data when trying to compile a regular
1839expression that contains the C<(?{ ... })> zero-width assertion, which
1840is unsafe. See L<perlre/(?{ code })>, and L<perlsec>.
e4d48cc9 1841
ad19ef22 1842=item Eval-group not allowed at runtime, use re 'eval' in regex m/%s/
e4d48cc9 1843
be771a83
GS
1844(F) Perl tried to compile a regular expression containing the
1845C<(?{ ... })> zero-width assertion at run time, as it would when the
f11307f5
FC
1846pattern contains interpolated values. Since that is a security risk,
1847it is not allowed. If you insist, you may still do this by using the
1848C<re 'eval'> pragma or by explicitly building the pattern from an
1849interpolated string at run time and using that in an eval(). See
1850L<perlre/(?{ code })>.
e4d48cc9 1851
ad19ef22 1852=item Eval-group not allowed, use re 'eval' in regex m/%s/
6df41af2 1853
be771a83
GS
1854(F) A regular expression contained the C<(?{ ... })> zero-width
1855assertion, but that construct is only allowed when the C<use re 'eval'>
1856pragma is in effect. See L<perlre/(?{ code })>.
6df41af2 1857
6fbc9859
MH
1858=item EVAL without pos change exceeded limit in regex; marked by <-- HERE in
1859m/%s/
1a147d38
YO
1860
1861(F) You used a pattern that nested too many EVAL calls without consuming
6903afa2 1862any text. Restructure the pattern so that text is consumed.
1a147d38 1863
9e3ec65c 1864The <-- HERE shows whereabouts in the regular expression the problem was
1a147d38
YO
1865discovered.
1866
fc36a67e
PP
1867=item Excessively long <> operator
1868
1869(F) The contents of a <> operator may not exceed the maximum size of a
1870Perl identifier. If you're just trying to glob a long list of
1871filenames, try using the glob() operator, or put the filenames into a
1872variable and glob that.
1873
ed9aa3b7
SG
1874=item exec? I'm not *that* kind of operating system
1875
af8bb25a 1876(F) The C<exec> function is not implemented on some systems, e.g., Symbian
6903afa2 1877OS. See L<perlport>.
ed9aa3b7 1878
fe13d51d 1879=item Execution of %s aborted due to compilation errors.
a0d0e21e
LW
1880
1881(F) The final summary message when a Perl compilation fails.
1882
1883=item Exiting eval via %s
1884
be771a83
GS
1885(W exiting) You are exiting an eval by unconventional means, such as a
1886goto, or a loop control statement.
e476b1b5
GS
1887
1888=item Exiting format via %s
1889
9a2ff54b 1890(W exiting) You are exiting a format by unconventional means, such as a
be771a83 1891goto, or a loop control statement.
a0d0e21e 1892
0a753a76
PP
1893=item Exiting pseudo-block via %s
1894
be771a83
GS
1895(W exiting) You are exiting a rather special block construct (like a
1896sort block or subroutine) by unconventional means, such as a goto, or a
1897loop control statement. See L<perlfunc/sort>.
0a753a76 1898
a0d0e21e
LW
1899=item Exiting subroutine via %s
1900
be771a83
GS
1901(W exiting) You are exiting a subroutine by unconventional means, such
1902as a goto, or a loop control statement.
a0d0e21e
LW
1903
1904=item Exiting substitution via %s
1905
be771a83
GS
1906(W exiting) You are exiting a substitution by unconventional means, such
1907as a return, a goto, or a loop control statement.
a0d0e21e 1908
c608e803
KW
1909=item Expecting close bracket in regex; marked by <-- HERE in m/%s/
1910
1911(F)
1912You wrote something like
1913
1914 (?13
1915
1916to denote a capturing group of the form
1917L<C<(?I<PARNO>)>|perlre/(?PARNO) (?-PARNO) (?+PARNO) (?R) (?0)>,
1918but omitted the C<")">.
1919
e7d0b801
FC
1920=item Experimental "%s" subs not enabled
1921
1922(F) To use lexical subs, you must first enable them:
1923
f1d34ca8 1924 no warnings 'experimental::lexical_subs';
e7d0b801
FC
1925 use feature 'lexical_subs';
1926 my sub foo { ... }
1927
7b8d334a
GS
1928=item Explicit blessing to '' (assuming package main)
1929
be771a83
GS
1930(W misc) You are blessing a reference to a zero length string. This has
1931the effect of blessing the reference into the package main. This is
1932usually not what you want. Consider providing a default target package,
1933e.g. bless($ref, $p || 'MyPackage');
7b8d334a 1934
6df41af2
GS
1935=item %s: Expression syntax
1936
be771a83
GS
1937(A) You've accidentally run your script through B<csh> instead of Perl.
1938Check the #! line, or manually feed your script into Perl yourself.
6df41af2
GS
1939
1940=item %s failed--call queue aborted
1941
3c10abe3
AG
1942(F) An untrapped exception was raised while executing a UNITCHECK,
1943CHECK, INIT, or END subroutine. Processing of the remainder of the
1944queue of such routines has been prematurely ended.
6df41af2 1945
7253e4e3 1946=item False [] range "%s" in regex; marked by <-- HERE in m/%s/
73b437c8 1947
be771a83 1948(W regexp) A character class range must start and end at a literal
7253e4e3
RK
1949character, not another character class like C<\d> or C<[:alpha:]>. The "-"
1950in your false range is interpreted as a literal "-". Consider quoting the
9e3ec65c 1951"-", "\-". The <-- HERE shows whereabouts in the regular expression the
7253e4e3 1952problem was discovered. See L<perlre>.
73b437c8 1953
1b1ee2ef 1954=item Fatal VMS error (status=%d) at %s, line %d
a0d0e21e 1955
be771a83
GS
1956(P) An error peculiar to VMS. Something untoward happened in a VMS
1957system service or RTL routine; Perl's exit status should provide more
1958details. The filename in "at %s" and the line number in "line %d" tell
1959you which section of the Perl source code is distressed.
a0d0e21e
LW
1960
1961=item fcntl is not implemented
1962
1963(F) Your machine apparently doesn't implement fcntl(). What is this, a
1964PDP-11 or something?
1965
22846ab4
AB
1966=item FETCHSIZE returned a negative value
1967
1968(F) A tied array claimed to have a negative number of elements, which
1969is not possible.
1970
f337b084
TH
1971=item Field too wide in 'u' format in pack
1972
d8b5cc61 1973(W pack) Each line in an uuencoded string starts with a length indicator
6903afa2
FC
1974which can't encode values above 63. So there is no point in asking for
1975a line length bigger than that. Perl will behave as if you specified
5c96f6f7 1976C<u63> as the format.
f337b084 1977
af8c498a 1978=item Filehandle %s opened only for input
a0d0e21e 1979
6c8d78fb
HS
1980(W io) You tried to write on a read-only filehandle. If you intended
1981it to be a read-write filehandle, you needed to open it with "+<" or
1982"+>" or "+>>" instead of with "<" or nothing. If you intended only to
1983write the file, use ">" or ">>". See L<perlfunc/open>.
a0d0e21e 1984
af8c498a 1985=item Filehandle %s opened only for output
a0d0e21e 1986
6c8d78fb
HS
1987(W io) You tried to read from a filehandle opened only for writing, If
1988you intended it to be a read/write filehandle, you needed to open it
89a1bda8
FC
1989with "+<" or "+>" or "+>>" instead of with ">". If you intended only to
1990read from the file, use "<". See L<perlfunc/open>. Another possibility
1991is that you attempted to open filedescriptor 0 (also known as STDIN) for
1992output (maybe you closed STDIN earlier?).
97828cef
RGS
1993
1994=item Filehandle %s reopened as %s only for input
1995
1996(W io) You opened for reading a filehandle that got the same filehandle id
6903afa2 1997as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR
97828cef
RGS
1998previously.
1999
2000=item Filehandle STDIN reopened as %s only for output
2001
2002(W io) You opened for writing a filehandle that got the same filehandle id
fa816bf3 2003as STDIN. This occurred because you closed STDIN previously.
a0d0e21e
LW
2004
2005=item Final $ should be \$ or $name
2006
2007(F) You must now decide whether the final $ in a string was meant to be
be771a83
GS
2008a literal dollar sign, or was meant to introduce a variable name that
2009happens to be missing. So you have to put either the backslash or the
2010name.
a0d0e21e 2011
56e90b21
GS
2012=item flock() on closed filehandle %s
2013
be771a83 2014(W closed) The filehandle you're attempting to flock() got itself closed
c289d2f7 2015some time before now. Check your control flow. flock() operates on
be771a83
GS
2016filehandles. Are you attempting to call flock() on a dirhandle by the
2017same name?
56e90b21 2018
6df41af2
GS
2019=item Format not terminated
2020
2021(F) A format must be terminated by a line with a solitary dot. Perl got
2022to the end of your file without finding such a line.
2023
a0d0e21e
LW
2024=item Format %s redefined
2025
e476b1b5 2026(W redefine) You redefined a format. To suppress this warning, say
a0d0e21e
LW
2027
2028 {
271595cc 2029 no warnings 'redefine';
a0d0e21e
LW
2030 eval "format NAME =...";
2031 }
2032
a0d0e21e
LW
2033=item Found = in conditional, should be ==
2034
e476b1b5 2035(W syntax) You said
a0d0e21e
LW
2036
2037 if ($foo = 123)
2038
2039when you meant
2040
2041 if ($foo == 123)
2042
2043(or something like that).
2044
6df41af2
GS
2045=item %s found where operator expected
2046
56da5a46
RGS
2047(S syntax) The Perl lexer knows whether to expect a term or an operator.
2048If it sees what it knows to be a term when it was expecting to see an
be771a83
GS
2049operator, it gives you this warning. Usually it indicates that an
2050operator or delimiter was omitted, such as a semicolon.
6df41af2 2051
a0d0e21e
LW
2052=item gdbm store returned %d, errno %d, key "%s"
2053
2054(S) A warning from the GDBM_File extension that a store failed.
2055
2056=item gethostent not implemented
2057
2058(F) Your C library apparently doesn't implement gethostent(), probably
2059because if it did, it'd feel morally obligated to return every hostname
2060on the Internet.
2061
69282e91 2062=item get%sname() on closed socket %s
a0d0e21e 2063
be771a83
GS
2064(W closed) You tried to get a socket or peer socket name on a closed
2065socket. Did you forget to check the return value of your socket() call?
a0d0e21e 2066
748a9306
LW
2067=item getpwnam returned invalid UIC %#o for user "%s"
2068
2069(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
2070C<getpwnam> operator returned an invalid UIC.
2071
6df41af2
GS
2072=item getsockopt() on closed socket %s
2073
be771a83
GS
2074(W closed) You tried to get a socket option on a closed socket. Did you
2075forget to check the return value of your socket() call? See
6df41af2
GS
2076L<perlfunc/getsockopt>.
2077
0f539b13
BF
2078=item given is experimental
2079
2080(S experimental::smartmatch) C<given> depends on both a lexical C<$_> and
2081smartmatch, both of which are experimental, so its behavior may change or
2082even be removed in any future release of perl.
2083See the explanation under L<perlsyn/Experimental Details on given and when>.
2084
6df41af2
GS
2085=item Global symbol "%s" requires explicit package name
2086
a4edf47d 2087(F) You've said "use strict" or "use strict vars", which indicates
30c282f6 2088that all variables must either be lexically scoped (using "my" or "state"),
a4edf47d
GS
2089declared beforehand using "our", or explicitly qualified to say
2090which package the global variable is in (using "::").
6df41af2 2091
e476b1b5
GS
2092=item glob failed (%s)
2093
5ead438e 2094(S glob) Something went wrong with the external program(s) used
73c4e9dc
FC
2095for C<glob> and C<< <*.c> >>. Usually, this means that you supplied a C<glob>
2096pattern that caused the external program to fail and exit with a
be771a83 2097nonzero status. If the message indicates that the abnormal exit
73c4e9dc
FC
2098resulted in a coredump, this may also mean that your csh (C shell)
2099is broken. If so, you should change all of the csh-related variables
2100in config.sh: If you have tcsh, make the variables refer to it as
2101if it were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them
2102all empty (except that C<d_csh> should be C<'undef'>) so that Perl will
be771a83 2103think csh is missing. In either case, after editing config.sh, run
75b44862 2104C<./Configure -S> and rebuild Perl.
e476b1b5 2105
a0d0e21e
LW
2106=item Glob not terminated
2107
2108(F) The lexer saw a left angle bracket in a place where it was expecting
be771a83
GS
2109a term, so it's looking for the corresponding right angle bracket, and
2110not finding it. Chances are you left some needed parentheses out
2111earlier in the line, and you really meant a "less than".
a0d0e21e 2112
bcd05b94 2113=item gmtime(%f) too large
8b56d6ff 2114
e9200be3 2115(W overflow) You called C<gmtime> with a number that was larger than
fc003d4b 2116it can reliably handle and C<gmtime> probably returned the wrong
6903afa2 2117date. This warning is also triggered with NaN (the special
fc003d4b
MS
2118not-a-number value).
2119
bcd05b94 2120=item gmtime(%f) too small
fc003d4b 2121
e9200be3 2122(W overflow) You called C<gmtime> with a number that was smaller than
e7a1a147 2123it can reliably handle and C<gmtime> probably returned the wrong date.
8b56d6ff 2124
6df41af2 2125=item Got an error from DosAllocMem
a0d0e21e 2126
6df41af2
GS
2127(P) An error peculiar to OS/2. Most probably you're using an obsolete
2128version of Perl, and this should not happen anyway.
a0d0e21e
LW
2129
2130=item goto must have label
2131
2132(F) Unlike with "next" or "last", you're not allowed to goto an
2133unspecified destination. See L<perlfunc/goto>.
2134
6651ba0b
FC
2135=item Goto undefined subroutine%s
2136
2137(F) You tried to call a subroutine with C<goto &sub> syntax, but
2138the indicated subroutine hasn't been defined, or if it was, it
2139has since been undefined.
2140
49704364 2141=item ()-group starts with a count
18529408 2142
bca4a986
FC
2143(F) A ()-group started with a count. A count is supposed to follow
2144something: a template character or a ()-group. See L<perlfunc/pack>.
18529408 2145
6fbc9859
MH
2146=item Group name must start with a non-digit word character in regex; marked by
2147<-- HERE in m/%s/
1f4f6bf1
YO
2148
2149(F) Group names must follow the rules for perl identifiers, meaning
2150they must start with a non-digit word character. A common cause of
2151this error is using (?&0) instead of (?0). See L<perlre>.
2152
fe13d51d 2153=item %s had compilation errors.
6df41af2
GS
2154
2155(F) The final summary message when a C<perl -c> fails.
2156
a0d0e21e
LW
2157=item Had to create %s unexpectedly
2158
be771a83
GS
2159(S internal) A routine asked for a symbol from a symbol table that ought
2160to have existed already, but for some reason it didn't, and had to be
2161created on an emergency basis to prevent a core dump.
a0d0e21e
LW
2162
2163=item Hash %%s missing the % in argument %d of %s()
2164
be771a83
GS
2165(D deprecated) Really old Perl let you omit the % on hash names in some
2166spots. This is now heavily deprecated.
a0d0e21e 2167
6df41af2
GS
2168=item %s has too many errors
2169
2170(F) The parser has given up trying to parse the program after 10 errors.
2171Further error messages would likely be uninformative.
2172
252aa082
JH
2173=item Hexadecimal number > 0xffffffff non-portable
2174
e476b1b5 2175(W portable) The hexadecimal number you specified is larger than 2**32-1
9e24b6e2
JH
2176(4294967295) and therefore non-portable between systems. See
2177L<perlport> for more on portability concerns.
252aa082 2178
82f96200
JL
2179=item -i used with no filenames on the command line, reading from STDIN
2180
2181(S inplace) The C<-i> option was passed on the command line, indicating
2182that the script is intended to edit files inplace, but no files were
0421bbaa
FC
2183given. This is usually a mistake, since editing STDIN inplace doesn't
2184make sense, and can be confusing because it can make perl look like
2185it is hanging when it is really just trying to read from STDIN. You
2186should either pass a filename to edit, or remove C<-i> from the command
2187line. See L<perlrun> for more details.
82f96200 2188
8903cb82
PP
2189=item Identifier too long
2190
2191(F) Perl limits identifiers (names for variables, functions, etc.) to
fc36a67e 2192about 250 characters for simple names, and somewhat more for compound
be771a83
GS
2193names (like C<$A::B>). You've exceeded Perl's limits. Future versions
2194of Perl are likely to eliminate these arbitrary limitations.
8903cb82 2195
b33c0c71 2196=item Ignoring zero length \N{} in character class in regex; marked by <-- HERE in m/%s/
fc8cd66c 2197
b33c0c71 2198(W regexp) Named Unicode character escapes C<(\N{...})> may return a zero-length
6903afa2
FC
2199sequence. When such an escape is used in a character class its
2200behaviour is not well defined. Check that the correct escape has
fc8cd66c
YO
2201been used, and the correct charname handler is in scope.
2202
6df41af2 2203=item Illegal binary digit %s
f675dbe5 2204
6df41af2 2205(F) You used a digit other than 0 or 1 in a binary number.
f675dbe5 2206
6df41af2 2207=item Illegal binary digit %s ignored
a0d0e21e 2208
be771a83
GS
2209(W digit) You may have tried to use a digit other than 0 or 1 in a
2210binary number. Interpretation of the binary number stopped before the
2211offending digit.
a0d0e21e 2212
6597eb22
FC
2213=item Illegal character after '_' in prototype for %s : %s
2214
2215(W illegalproto) An illegal character was found in a prototype declaration.
2216Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
2217
78d0fecf 2218=item Illegal character \%o (carriage return)
4fdae800 2219
d5898338 2220(F) Perl normally treats carriage returns in the program text as it
be771a83
GS
2221would any other whitespace, which means you should never see this error
2222when Perl was built using standard options. For some reason, your
2223version of Perl appears to have been built without this support. Talk
2224to your Perl administrator.
4fdae800 2225
d37a9538
ST
2226=item Illegal character in prototype for %s : %s
2227
197afce1 2228(W illegalproto) An illegal character was found in a prototype declaration.
2e9cc7ef 2229Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
d37a9538 2230
904d85c5
RGS
2231=item Illegal declaration of anonymous subroutine
2232
2233(F) When using the C<sub> keyword to construct an anonymous subroutine,
6903afa2 2234you must always specify a block of code. See L<perlsub>.
904d85c5 2235
8e742a20
MHM
2236=item Illegal declaration of subroutine %s
2237
6903afa2 2238(F) A subroutine was not declared correctly. See L<perlsub>.
8e742a20 2239
a0d0e21e
LW
2240=item Illegal division by zero
2241
be771a83
GS
2242(F) You tried to divide a number by 0. Either something was wrong in
2243your logic, or you need to put a conditional in to guard against
2244meaningless input.
a0d0e21e 2245
6df41af2
GS
2246=item Illegal hexadecimal digit %s ignored
2247
be771a83
GS
2248(W digit) You may have tried to use a character other than 0 - 9 or
2249A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal
2250number stopped before the illegal character.
6df41af2 2251
a0d0e21e
LW
2252=item Illegal modulus zero
2253
be771a83
GS
2254(F) You tried to divide a number by 0 to get the remainder. Most
2255numbers don't take to this kindly.
a0d0e21e 2256
6df41af2 2257=item Illegal number of bits in vec
399388f4 2258
6df41af2
GS
2259(F) The number of bits in vec() (the third argument) must be a power of
2260two from 1 to 32 (or 64, if your platform supports that).
399388f4
GS
2261
2262=item Illegal octal digit %s
a0d0e21e 2263
d1be9408 2264(F) You used an 8 or 9 in an octal number.
a0d0e21e 2265
399388f4 2266=item Illegal octal digit %s ignored
748a9306 2267
d1be9408 2268(W digit) You may have tried to use an 8 or 9 in an octal number.
75b44862 2269Interpretation of the octal number stopped before the 8 or 9.
748a9306 2270
c608e803
KW
2271=item Illegal pattern in regex; marked by <-- HERE in m/%s/
2272
2273(F)
2274You wrote something like
2275
2276 (?+foo)
2277
2278The C<"+"> is valid only when followed by digits, indicating a
2279capturing group. See
2280L<C<(?I<PARNO>)>|perlre/(?PARNO) (?-PARNO) (?+PARNO) (?R) (?0)>.
2281
fe13d51d 2282=item Illegal switch in PERL5OPT: -%c
6ff81951 2283
6df41af2 2284(X) The PERL5OPT environment variable may only be used to set the
646ca9b2 2285following switches: B<-[CDIMUdmtw]>.
6ff81951 2286
6df41af2 2287=item Ill-formed CRTL environ value "%s"
81e118e0 2288
75b44862 2289(W internal) A warning peculiar to VMS. Perl tried to read the CRTL's
be771a83
GS
2290internal environ array, and encountered an element without the C<=>
2291delimiter used to separate keys from values. The element is ignored.
09bef843 2292
6df41af2 2293=item Ill-formed message in prime_env_iter: |%s|
54310121 2294
be771a83
GS
2295(W internal) A warning peculiar to VMS. Perl tried to read a logical
2296name or CLI symbol definition when preparing to iterate over %ENV, and
2297didn't see the expected delimiter between key and value, so the line was
2298ignored.
54310121 2299
6df41af2 2300=item (in cleanup) %s
9607fc9c 2301
be771a83
GS
2302(W misc) This prefix usually indicates that a DESTROY() method raised
2303the indicated exception. Since destructors are usually called by the
2304system at arbitrary points during execution, and often a vast number of
2305times, the warning is issued only once for any number of failures that
2306would otherwise result in the same message being repeated.
6df41af2 2307
be771a83
GS
2308Failure of user callbacks dispatched using the C<G_KEEPERR> flag could
2309also result in this warning. See L<perlcall/G_KEEPERR>.
9607fc9c 2310
000947ad
KW
2311=item In '(*VERB...)', splitting the initial '(*' is deprecated in regex; marked by <-- HERE in m/%s/
2312
2313(D regexp, deprecated)
2314The two-character sequence C<"(*"> in this context in a regular
2315expression pattern should be an indivisible token, with nothing
2316intervening between the C<"("> and the C<"*">, but you separated them.
2317Due to an accident of implementation, this prohibition was not enforced,
2318but we do plan to forbid it in a future Perl version. This message
2319serves as giving you fair warning of this pending change.
2320
2321=item In '(?...)', splitting the initial '(?' is deprecated in regex; marked by <-- HERE in m/%s/
2322
2323(D regexp, deprecated)
2324The two-character sequence C<"(?"> in this context in a regular
2325expression pattern should be an indivisible token, with nothing
2326intervening between the C<"("> and the C<"?">, but you separated them.
2327Due to an accident of implementation, this prohibition was not enforced,
2328but we do plan to forbid it in a future Perl version. This message
2329serves as giving you fair warning of this pending change.
2330
0d0b4b3b
KW
2331=item Incomplete expression within '(?[ ])' in regex; marked by <-- HERE in m/%s/
2332
2333(F)
2334There was a syntax error within the C<(?[ ])>. This can happen if the
2335expression inside the construct was completely empty, or if there are
2336too many or few operands for the number of operators. Perl is not smart
2337enough to give you a more precise indication as to what is wrong.
2338
6fbc9859
MH
2339=item Inconsistent hierarchy during C3 merge of class '%s': merging failed on
2340parent '%s'
2c7d6b9c
RGS
2341
2342(F) The method resolution order (MRO) of the given class is not
2343C3-consistent, and you have enabled the C3 MRO for this class. See the C3
2344documentation in L<mro> for more information.
2345
979699d9
JH
2346=item In EBCDIC the v-string components cannot exceed 2147483647
2347
2348(F) An error peculiar to EBCDIC. Internally, v-strings are stored as
2349Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC
2350encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF).
2351
1a147d38
YO
2352=item Infinite recursion in regex; marked by <-- HERE in m/%s/
2353
2354(F) You used a pattern that references itself without consuming any input
6903afa2 2355text. You should check the pattern to ensure that recursive patterns
1a147d38
YO
2356either consume text or fail.
2357
9e3ec65c 2358The <-- HERE shows whereabouts in the regular expression the problem was
1a147d38
YO
2359discovered.
2360
6dbe9451
NC
2361=item Initialization of state variables in list context currently forbidden
2362
6903afa2
FC
2363(F) Currently the implementation of "state" only permits the
2364initialization of scalar variables in scalar context. Re-write
2365C<state ($a) = 42> as C<state $a = 42> to change from list to scalar
2366context. Constructions such as C<state (@a) = foo()> will be
2367supported in a future perl release.
6dbe9451 2368
a0d0e21e
LW
2369=item Insecure dependency in %s
2370
8b1a09fc 2371(F) You tried to do something that the tainting mechanism didn't like.
be771a83
GS
2372The tainting mechanism is turned on when you're running setuid or
2373setgid, or when you specify B<-T> to turn it on explicitly. The
2374tainting mechanism labels all data that's derived directly or indirectly
2375from the user, who is considered to be unworthy of your trust. If any
2376such data is used in a "dangerous" operation, you get this error. See
2377L<perlsec> for more information.
a0d0e21e
LW
2378
2379=item Insecure directory in %s
2380
be771a83
GS
2381(F) You can't use system(), exec(), or a piped open in a setuid or
2382setgid script if C<$ENV{PATH}> contains a directory that is writable by
df98f984
RGS
2383the world. Also, the PATH must not contain any relative directory.
2384See L<perlsec>.
a0d0e21e 2385
62f468fc 2386=item Insecure $ENV{%s} while running %s
a0d0e21e
LW
2387
2388(F) You can't use system(), exec(), or a piped open in a setuid or
62f468fc 2389setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
332d5f78
SR
2390C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data
2391supplied (or potentially supplied) by the user. The script must set
2392the path to a known value, using trustworthy data. See L<perlsec>.
a0d0e21e 2393
0e9be77f
DM
2394=item Insecure user-defined property %s
2395
2396(F) Perl detected tainted data when trying to compile a regular
2397expression that contains a call to a user-defined character property
2398function, i.e. C<\p{IsFoo}> or C<\p{InFoo}>.
2399See L<perlunicode/User-Defined Character Properties> and L<perlsec>.
2400
b9ef414d
FC
2401=item Integer overflow in format string for %s
2402
2403(F) The indexes and widths specified in the format string of C<printf()>
2404or C<sprintf()> are too large. The numbers must not overflow the size of
2405integers for your architecture.
2406
a7ae9550
GS
2407=item Integer overflow in %s number
2408
35928bc5 2409(S overflow) The hexadecimal, octal or binary number you have specified
be771a83
GS
2410either as a literal or as an argument to hex() or oct() is too big for
2411your architecture, and has been converted to a floating point number.
2412On a 32-bit architecture the largest hexadecimal, octal or binary number
9e24b6e2
JH
2413representable without overflow is 0xFFFFFFFF, 037777777777, or
24140b11111111111111111111111111111111 respectively. Note that Perl
2415transparently promotes all numbers to a floating point representation
2416internally--subject to loss of precision errors in subsequent
2417operations.
bbce6d69 2418
fc89ca81
FC
2419=item Integer overflow in srand
2420
2421(S overflow) The number you have passed to srand is too big to fit
2422in your architecture's integer representation. The number has been
2423replaced with the largest integer supported (0xFFFFFFFF on 32-bit
2424architectures). This means you may be getting less randomness than
2425you expect, because different random seeds above the maximum will
2426return the same sequence of random numbers.
2427
46314c13
JP
2428=item Integer overflow in version
2429
18da5252
FC
2430=item Integer overflow in version %d
2431
784d71ed
FC
2432(W overflow) Some portion of a version initialization is too large for
2433the size of integers for your architecture. This is not a warning
f084e84f 2434because there is no rational reason for a version to try and use an
784d71ed
FC
2435element larger than typically 2**32. This is usually caused by trying
2436to use some odd mathematical operation as a version, like 100/9.
46314c13 2437
7253e4e3 2438=item Internal disaster in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2439
2440(P) Something went badly wrong in the regular expression parser.
9e3ec65c 2441The <-- HERE shows whereabouts in the regular expression the problem was
b45f050a
JF
2442discovered.
2443
748a9306
LW
2444=item Internal inconsistency in tracking vforks
2445
be771a83
GS
2446(S) A warning peculiar to VMS. Perl keeps track of the number of times
2447you've called C<fork> and C<exec>, to determine whether the current call
2448to C<exec> should affect the current script or a subprocess (see
2449L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so
2450Perl is making a guess and treating this C<exec> as a request to
2451terminate the Perl script and execute the specified command.
748a9306 2452
7253e4e3 2453=item Internal urp in regex; marked by <-- HERE in m/%s/
b45f050a 2454
fa816bf3 2455(P) Something went badly awry in the regular expression parser. The
9e3ec65c 2456<-- HERE shows whereabouts in the regular expression the problem was
7253e4e3 2457discovered.
a0d0e21e 2458
6df41af2
GS
2459=item %s (...) interpreted as function
2460
75b44862 2461(W syntax) You've run afoul of the rule that says that any list operator
be771a83 2462followed by parentheses turns into a function, with all the list
64977eb6 2463operators arguments found inside the parentheses. See
13a2d996 2464L<perlop/Terms and List Operators (Leftward)>.
6df41af2 2465
09bef843
SB
2466=item Invalid %s attribute: %s
2467
a4a4c9e2 2468(F) The indicated attribute for a subroutine or variable was not recognized
09bef843
SB
2469by Perl or by a user-supplied handler. See L<attributes>.
2470
2471=item Invalid %s attributes: %s
2472
a4a4c9e2 2473(F) The indicated attributes for a subroutine or variable were not
be771a83 2474recognized by Perl or by a user-supplied handler. See L<attributes>.
09bef843 2475
c608e803
KW
2476=item Invalid [] range "%*.*s" in regex; marked by <-- HERE in m/%s/
2477
2478(F)
2479You wrote something like
2480
2481 [z-a]
2482
2483in a regular expression pattern. Ranges must be specified with the
2484lowest code point first. Instead write
2485
2486 [a-z]
2487
4d7cd482
KW
2488=item Invalid character in \N{...}; marked by <-- HERE in \N{%s}
2489
2490(F) Only certain characters are valid for character names. The
2491indicated one isn't. See L<charnames/CUSTOM ALIASES>.
2492
225fb84f
KW
2493=item Invalid character in charnames alias definition; marked by <-- HERE in '%s
2494
2495(F) You tried to create a custom alias for a character name, with
2496the C<:alias> option to C<use charnames> and the specified character in
2497the indicated name isn't valid. See L<charnames/CUSTOM ALIASES>.
2498
c635e13b
PP
2499=item Invalid conversion in %s: "%s"
2500
be771a83
GS
2501(W printf) Perl does not understand the given format conversion. See
2502L<perlfunc/sprintf>.
c635e13b 2503
6fbc9859
MH
2504=item Invalid escape in the specified encoding in regex; marked by <-- HERE in
2505m/%s/
9e08bc66
ST
2506
2507(W regexp) The numeric escape (for example C<\xHH>) of value < 256
2508didn't correspond to a single character through the conversion
2509from the encoding specified by the encoding pragma.
2510The escape was replaced with REPLACEMENT CHARACTER (U+FFFD) instead.
9e3ec65c 2511The <-- HERE shows whereabouts in the regular expression the
9e08bc66
ST
2512escape was discovered.
2513
8149aa9f
FC
2514=item Invalid hexadecimal number in \N{U+...}
2515
6fbc9859
MH
2516=item Invalid hexadecimal number in \N{U+...} in regex; marked by <-- HERE in
2517m/%s/
aec0ef10 2518
8149aa9f 2519(F) The character constant represented by C<...> is not a valid hexadecimal
74f8e9e3
FC
2520number. Either it is empty, or you tried to use a character other than
25210 - 9 or A - F, a - f in a hexadecimal number.
8149aa9f 2522
6651ba0b
FC
2523=item Invalid module name %s with -%c option: contains single ':'
2524
2525(F) The module argument to perl's B<-m> and B<-M> command-line options
2526cannot contain single colons in the module name, but only in the
2527arguments after "=". In other words, B<-MFoo::Bar=:baz> is ok, but
2528B<-MFoo:Bar=baz> is not.
2529
2c7d6b9c
RGS
2530=item Invalid mro name: '%s'
2531
162a3e34
FC
2532(F) You tried to C<mro::set_mro("classname", "foo")> or C<use mro 'foo'>,
2533where C<foo> is not a valid method resolution order (MRO). Currently,
2534the only valid ones supported are C<dfs> and C<c3>, unless you have loaded
2535a module that is a MRO plugin. See L<mro> and L<perlmroapi>.
2c7d6b9c 2536
40e4140b
FC
2537=item Invalid negative number (%s) in chr
2538
2539(W utf8) You passed a negative number to C<chr>. Negative numbers are
2540not valid characters numbers, so it return the Unicode replacement
2541character (U+FFFD).
2542
6651ba0b
FC
2543=item invalid option -D%c, use -D'' to see choices
2544
8ff21bfe
FC
2545(S debugging) Perl was called with invalid debugger flags. Call perl
2546with the B<-D> option with no flags to see the list of acceptable values.
982c4ecb 2547See also L<perlrun/-Dletters>.
6651ba0b 2548
7253e4e3 2549=item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2550
2551(F) The range specified in a character class had a minimum character
7253e4e3
RK
2552greater than the maximum character. One possibility is that you forgot the
2553C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only
9e3ec65c 2554up to C<ff>. The <-- HERE shows whereabouts in the regular expression the
7253e4e3 2555problem was discovered. See L<perlre>.
6df41af2 2556
d1573ac7 2557=item Invalid range "%s" in transliteration operator
c2e66d9e
GS
2558
2559(F) The range specified in the tr/// or y/// operator had a minimum
2560character greater than the maximum character. See L<perlop>.
2561
09bef843
SB
2562=item Invalid separator character %s in attribute list
2563
0120eecf 2564(F) Something other than a colon or whitespace was seen between the
be771a83
GS
2565elements of an attribute list. If the previous attribute had a
2566parenthesised parameter list, perhaps that list was terminated too soon.
2567See L<attributes>.
09bef843 2568
b4581f09
JH
2569=item Invalid separator character %s in PerlIO layer specification %s
2570
2bfc5f71
FC
2571(W layer) When pushing layers onto the Perl I/O system, something other
2572than a colon or whitespace was seen between the elements of a layer list.
b4581f09
JH
2573If the previous attribute had a parenthesised parameter list, perhaps that
2574list was terminated too soon.
2575
2c86d456
DG
2576=item Invalid strict version format (%s)
2577
fa816bf3 2578(F) A version number did not meet the "strict" criteria for versions.
2c86d456
DG
2579A "strict" version number is a positive decimal number (integer or
2580decimal-fraction) without exponentiation or else a dotted-decimal
2581v-string with a leading 'v' character and at least three components.
a6485a24 2582The parenthesized text indicates which criteria were not met.
2c86d456
DG
2583See the L<version> module for more details on allowed version formats.
2584
49704364 2585=item Invalid type '%s' in %s
96e4d5b1 2586
49704364
LW
2587(F) The given character is not a valid pack or unpack type.
2588See L<perlfunc/pack>.
6728c851 2589
49704364 2590(W) The given character is not a valid pack or unpack type but used to be
75b44862 2591silently ignored.
96e4d5b1 2592
2c86d456
DG
2593=item Invalid version format (%s)
2594
fa816bf3 2595(F) A version number did not meet the "lax" criteria for versions.
2c86d456
DG
2596A "lax" version number is a positive decimal number (integer or
2597decimal-fraction) without exponentiation or else a dotted-decimal
fa816bf3
FC
2598v-string. If the v-string has fewer than three components, it
2599must have a leading 'v' character. Otherwise, the leading 'v' is
2600optional. Both decimal and dotted-decimal versions may have a
2601trailing "alpha" component separated by an underscore character
2602after a fractional or dotted-decimal component. The parenthesized
2603text indicates which criteria were not met. See the L<version> module
2604for more details on allowed version formats.
46314c13 2605
798ae1b7
DG
2606=item Invalid version object
2607
fa816bf3
FC
2608(F) The internal structure of the version object was invalid.
2609Perhaps the internals were modified directly in some way or
2610an arbitrary reference was blessed into the "version" class.
798ae1b7 2611
a0d0e21e
LW
2612=item ioctl is not implemented
2613
2614(F) Your machine apparently doesn't implement ioctl(), which is pretty
2615strange for a machine that supports C.
2616
c289d2f7
JH
2617=item ioctl() on unopened %s
2618
2619(W unopened) You tried ioctl() on a filehandle that was never opened.
34b6fd5e 2620Check your control flow and number of arguments.
c289d2f7 2621
fe13d51d 2622=item IO layers (like '%s') unavailable
363c40c4
SB
2623
2624(F) Your Perl has not been configured to have PerlIO, and therefore
34b6fd5e 2625you cannot use IO layers. To have PerlIO, Perl must be configured
363c40c4
SB
2626with 'useperlio'.
2627
80cbd5ad
JH
2628=item IO::Socket::atmark not implemented on this architecture
2629
2630(F) Your machine doesn't implement the sockatmark() functionality,
34b6fd5e 2631neither as a system call nor an ioctl call (SIOCATMARK).
80cbd5ad 2632
4f650b80 2633=item $* is no longer supported
b4581f09 2634
4f650b80
NC
2635(D deprecated, syntax) The special variable C<$*>, deprecated in older
2636perls, has been removed as of 5.9.0 and is no longer supported. In
2637previous versions of perl the use of C<$*> enabled or disabled multi-line
2638matching within a string.
4fd19576
B
2639
2640Instead of using C<$*> you should use the C</m> (and maybe C</s>) regexp
6903afa2
FC
2641modifiers. You can enable C</m> for a lexical scope (even a whole file)
2642with C<use re '/m'>. (In older versions: when C<$*> was set to a true value
570dedd4 2643then all regular expressions behaved as if they were written using C</m>.)
b4581f09 2644
8ae1fe26
RGS
2645=item $# is no longer supported
2646
a58ac25e 2647(D deprecated, syntax) The special variable C<$#>, deprecated in older
6903afa2 2648perls, has been removed as of 5.9.3 and is no longer supported. You
a58ac25e 2649should use the printf/sprintf functions instead.
8ae1fe26 2650
ccf3535a 2651=item '%s' is not a code reference
6ad11d81 2652
6903afa2
FC
2653(W overload) The second (fourth, sixth, ...) argument of
2654overload::constant needs to be a code reference. Either
2655an anonymous subroutine, or a reference to a subroutine.
6ad11d81 2656
ccf3535a 2657=item '%s' is not an overloadable type
6ad11d81 2658
04a80ee0
RGS
2659(W overload) You tried to overload a constant type the overload package is
2660unaware of.
6ad11d81 2661
aec0ef10 2662=item Junk on end of regexp in regex m/%s/
a0d0e21e
LW
2663
2664(P) The regular expression parser is confused.
2665
2666=item Label not found for "last %s"
2667
be771a83
GS
2668(F) You named a loop to break out of, but you're not currently in a loop
2669of that name, not even if you count where you were called from. See
2670L<perlfunc/last>.
a0d0e21e
LW
2671
2672=item Label not found for "next %s"
2673
2674(F) You named a loop to continue, but you're not currently in a loop of
2675that name, not even if you count where you were called from. See
2676L<perlfunc/last>.
2677
2678=item Label not found for "redo %s"
2679
2680(F) You named a loop to restart, but you're not currently in a loop of
2681that name, not even if you count where you were called from. See
2682L<perlfunc/last>.
2683
85ab1d1d 2684=item leaving effective %s failed
5ff3f7a4 2685
85ab1d1d 2686(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
2687effective uids or gids failed.
2688
49704364
LW
2689=item length/code after end of string in unpack
2690
d7f8936a 2691(F) While unpacking, the string buffer was already used up when an unpack
6903afa2
FC
2692length/code combination tried to obtain more data. This results in
2693an undefined value for the length. See L<perlfunc/pack>.
49704364 2694
e508c8a4
MH
2695=item length() used on %s
2696
0d46a4e7
FC
2697(W syntax) You used length() on either an array or a hash when you
2698probably wanted a count of the items.
e508c8a4
MH
2699
2700Array size can be obtained by doing:
2701
2702 scalar(@array);
2703
2704The number of items in a hash can be obtained by doing:
2705
2706 scalar(keys %hash);
2707
f0e67a1d
Z
2708=item Lexing code attempted to stuff non-Latin-1 character into Latin-1 input
2709
2710(F) An extension is attempting to insert text into the current parse
6903afa2
FC
2711(using L<lex_stuff_pvn|perlapi/lex_stuff_pvn> or similar), but tried to insert a character that
2712couldn't be part of the current input. This is an inherent pitfall
2713of the stuffing mechanism, and one of the reasons to avoid it. Where
2714it is necessary to stuff, stuffing only plain ASCII is recommended.
f0e67a1d
Z
2715
2716=item Lexing code internal error (%s)
2717
2718(F) Lexing code supplied by an extension violated the lexer's API in a
2719detectable way.
2720
69282e91 2721=item listen() on closed socket %s
a0d0e21e 2722
be771a83
GS
2723(W closed) You tried to do a listen on a closed socket. Did you forget
2724to check the return value of your socket() call? See
2725L<perlfunc/listen>.
a0d0e21e 2726
6651ba0b
FC
2727=item List form of piped open not implemented
2728
2729(F) On some platforms, notably Windows, the three-or-more-arguments
2730form of C<open> does not support pipes, such as C<open($pipe, '|-', @args)>.
2731Use the two-argument C<open($pipe, '|prog arg1 arg2...')> form instead.
2732
bcd05b94 2733=item localtime(%f) too large
8b56d6ff 2734
e9200be3 2735(W overflow) You called C<localtime> with a number that was larger
fc003d4b 2736than it can reliably handle and C<localtime> probably returned the
6903afa2 2737wrong date. This warning is also triggered with NaN (the special
fc003d4b
MS
2738not-a-number value).
2739
bcd05b94 2740=item localtime(%f) too small
fc003d4b 2741
e9200be3 2742(W overflow) You called C<localtime> with a number that was smaller
fc003d4b 2743than it can reliably handle and C<localtime> probably returned the
e7a1a147 2744wrong date.
8b56d6ff 2745
58e23c8d 2746=item Lookbehind longer than %d not implemented in regex m/%s/
b45f050a
JF
2747
2748(F) There is currently a limit on the length of string which lookbehind can
6903afa2 2749handle. This restriction may be eased in a future release.
2e50fd82 2750
b88df990
NC
2751=item Lost precision when %s %f by 1
2752
e63e8a91
FC
2753(W imprecision) The value you attempted to increment or decrement by one
2754is too large for the underlying floating point representation to store
2755accurately, hence the target of C<++> or C<--> is unchanged. Perl issues this
2756warning because it has already switched from integers to floating point
2757when values are too large for integers, and now even floating point is
2758insufficient. You may wish to switch to using L<Math::BigInt> explicitly.
b88df990 2759
93fad930 2760=item lstat() on filehandle%s
2f7da168
RK
2761
2762(W io) You tried to do an lstat on a filehandle. What did you mean
2763by that? lstat() makes sense only on filenames. (Perl did a fstat()
2764instead on the filehandle.)
2765
345d70e3 2766=item lvalue attribute %s already-defined subroutine
bb3abb05 2767
345d70e3
FC
2768(W misc) Although L<attributes.pm|attributes> allows this, turning the lvalue
2769attribute on or off on a Perl subroutine that is already defined
2770does not always work properly. It may or may not do what you
2771want, depending on what code is inside the subroutine, with exact
2772details subject to change between Perl versions. Only do this
2773if you really know what you are doing.
bb3abb05 2774
885ef6f5
GG
2775=item lvalue attribute ignored after the subroutine has been defined
2776
345d70e3
FC
2777(W misc) Using the C<:lvalue> declarative syntax to make a Perl
2778subroutine an lvalue subroutine after it has been defined is
2779not permitted. To make the subroutine an lvalue subroutine,
2780add the lvalue attribute to the definition, or put the C<sub
2781foo :lvalue;> declaration before the definition.
2782
2783See also L<attributes.pm|attributes>.
885ef6f5 2784
2db62bbc 2785=item Malformed integer in [] in pack
49704364 2786
2db62bbc 2787(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2788are permitted. See L<perlfunc/pack>.
2789
2790=item Malformed integer in [] in unpack
2791
2db62bbc 2792(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2793are permitted. See L<perlfunc/pack>.
2794
6df41af2
GS
2795=item Malformed PERLLIB_PREFIX
2796
2797(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
2798
2799 prefix1;prefix2
2800
2801or
6df41af2
GS
2802 prefix1 prefix2
2803
be771a83
GS
2804with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of
2805a builtin library search path, prefix2 is substituted. The error may
2806appear if components are not found, or are too long. See
fecfaeb8 2807"PERLLIB_PREFIX" in L<perlos2>.
6df41af2 2808
2f758a16
ST
2809=item Malformed prototype for %s: %s
2810
d37a9538
ST
2811(F) You tried to use a function with a malformed prototype. The
2812syntax of function prototypes is given a brief compile-time check for
2813obvious errors like invalid characters. A more rigorous check is run
2814when the function is called.
2f758a16 2815
ba210ebe
JH
2816=item Malformed UTF-8 character (%s)
2817
4d6f11e5 2818(S utf8)(F) Perl detected a string that didn't comply with UTF-8
2575c402 2819encoding rules, even though it had the UTF8 flag on.
ba210ebe 2820
2575c402
JW
2821One possible cause is that you set the UTF8 flag yourself for data that
2822you thought to be in UTF-8 but it wasn't (it was for example legacy
6903afa2 28238-bit data). To guard against this, you can use Encode::decode_utf8.
2575c402
JW
2824
2825If you use the C<:encoding(UTF-8)> PerlIO layer for input, invalid byte
2826sequences are handled gracefully, but if you use C<:utf8>, the flag is
2827set without validating the data, possibly resulting in this error
2828message.
2829
2830See also L<Encode/"Handling Malformed Data">.
901b21bf 2831
107160e2
KW
2832=item Malformed UTF-8 character immediately after '%s'
2833
2834(F) You said C<use utf8>, but the program file doesn't comply with UTF-8
2835encoding rules. The message prints out the properly encoded characters
2836just before the first bad one. If C<utf8> warnings are enabled, a
2837warning is generated that gives more details about the type of
2838malformation.
2839
bde9e88d 2840=item Malformed UTF-8 returned by \N{%s} immediately after '%s'
ff3f963a
KW
2841
2842(F) The charnames handler returned malformed UTF-8.
2843
4a5d3a93
FC
2844=item Malformed UTF-8 string in '%c' format in unpack
2845
2846(F) You tried to unpack something that didn't comply with UTF-8 encoding
2847rules and perl was unable to guess how to make more progress.
2848
f337b084
TH
2849=item Malformed UTF-8 string in pack
2850
2851(F) You tried to pack something that didn't comply with UTF-8 encoding
2852rules and perl was unable to guess how to make more progress.
2853
2854=item Malformed UTF-8 string in unpack
2855
2856(F) You tried to unpack something that didn't comply with UTF-8 encoding
2857rules and perl was unable to guess how to make more progress.
2858
4a5d3a93 2859=item Malformed UTF-16 surrogate
f337b084 2860
4a5d3a93
FC
2861(F) Perl thought it was reading UTF-16 encoded character data but while
2862doing it Perl met a malformed Unicode surrogate.
2863
2864=item %s matches null string many times in regex; marked by <-- HERE in m/%s/
2865
2866(W regexp) The pattern you've specified would be an infinite loop if the
2867regular expression engine didn't specifically check for that. The <-- HERE
9e3ec65c 2868shows whereabouts in the regular expression the problem was discovered.
4a5d3a93 2869See L<perlre>.
f337b084 2870
de42a5a9 2871=item Maximal count of pending signals (%u) exceeded
2563cec5 2872
6903afa2 2873(F) Perl aborted due to too high a number of signals pending. This
2563cec5
IZ
2874usually indicates that your operating system tried to deliver signals
2875too fast (with a very high priority), starving the perl process from
2876resources it would need to reach a point where it can process signals
6903afa2 2877safely. (See L<perlipc/"Deferred Signals (Safe Signals)">.)
2563cec5 2878
25f58aea
PN
2879=item "%s" may clash with future reserved word
2880
2881(W) This warning may be due to running a perl5 script through a perl4
2882interpreter, especially if the word that is being warned about is
2883"use" or "my".
2884
0d2487cd 2885=item '%' may not be used in pack
6df41af2
GS
2886
2887(F) You can't pack a string by supplying a checksum, because the
be771a83
GS
2888checksumming process loses information, and you can't go the other way.
2889See L<perlfunc/unpack>.
6df41af2 2890
a0d0e21e
LW
2891=item Method for operation %s not found in package %s during blessing
2892
2893(F) An attempt was made to specify an entry in an overloading table that
e7ea3e70 2894doesn't resolve to a valid subroutine. See L<overload>.
a0d0e21e 2895
3cdd684c
TP
2896=item Method %s not permitted
2897
2898See Server error.
2899
a0d0e21e
LW
2900=item Might be a runaway multi-line %s string starting on line %d
2901
2902(S) An advisory indicating that the previous error may have been caused
2903by a missing delimiter on a string or pattern, because it eventually
2904ended earlier on the current line.
2905
2906=item Misplaced _ in number
2907
d4ced10d
JH
2908(W syntax) An underscore (underbar) in a numeric constant did not
2909separate two digits.
a0d0e21e 2910
7baa4690
HS
2911=item Missing argument in %s
2912
2913(W uninitialized) A printf-type format required more arguments than were
2914supplied.
2915
9e81e6a1
RGS
2916=item Missing argument to -%c
2917
2918(F) The argument to the indicated command line switch must follow
2919immediately after the switch, without intervening spaces.
2920
ff3f963a 2921=item Missing braces on \N{}
423cee85 2922
aec0ef10
FC
2923=item Missing braces on \N{} in regex; marked by <-- HERE in m/%s/
2924
4a2d328f 2925(F) Wrong syntax of character name literal C<\N{charname}> within
532cb70d
FC
2926double-quotish context. This can also happen when there is a space
2927(or comment) between the C<\N> and the C<{> in a regex with the C</x> modifier.
2928This modifier does not change the requirement that the brace immediately
2929follow the C<\N>.
423cee85 2930
f0a2b745
KW
2931=item Missing braces on \o{}
2932
2933(F) A C<\o> must be followed immediately by a C<{> in double-quotish context.
2934
a0d0e21e
LW
2935=item Missing comma after first argument to %s function
2936
2937(F) While certain functions allow you to specify a filehandle or an
2938"indirect object" before the argument list, this ain't one of them.
2939
06eaf0bc
GS
2940=item Missing command in piped open
2941
be771a83
GS
2942(W pipe) You used the C<open(FH, "| command")> or
2943C<open(FH, "command |")> construction, but the command was missing or
2944blank.
06eaf0bc 2945
961ce445
RGS
2946=item Missing control char name in \c
2947
2948(F) A double-quoted string ended with "\c", without the required control
2949character name.
2950
8767b1ab 2951=item Missing name in "%s sub"
6df41af2 2952
be771a83
GS
2953(F) The reserved syntax for lexically scoped subroutines requires that
2954they have a name with which they can be found.
6df41af2
GS
2955
2956=item Missing $ on loop variable
2957
be771a83
GS
2958(F) Apparently you've been programming in B<csh> too much. Variables
2959are always mentioned with the $ in Perl, unlike in the shells, where it
2960can vary from one line to the next.
6df41af2 2961
cc507455 2962=item (Missing operator before %s?)
748a9306 2963
56da5a46
RGS
2964(S syntax) This is an educated guess made in conjunction with the message
2965"%s found where operator expected". Often the missing operator is a comma.
748a9306 2966
aec0ef10 2967=item Missing right brace on \%c{} in regex; marked by <-- HERE in m/%s/
ab13f0c7 2968
ff3f963a
KW
2969(F) Missing right brace in C<\x{...}>, C<\p{...}>, C<\P{...}>, or C<\N{...}>.
2970
4a68bf9d 2971=item Missing right brace on \N{} or unescaped left brace after \N
ff3f963a 2972
d32207c9
FC
2973(F) C<\N> has two meanings.
2974
2975The traditional one has it followed by a name enclosed in braces,
2976meaning the character (or sequence of characters) given by that
fa816bf3 2977name. Thus C<\N{ASTERISK}> is another way of writing C<*>, valid in both
d32207c9
FC
2978double-quoted strings and regular expression patterns. In patterns,
2979it doesn't have the meaning an unescaped C<*> does.
2980
2981Starting in Perl 5.12.0, C<\N> also can have an additional meaning (only)
2982in patterns, namely to match a non-newline character. (This is short
2983for C<[^\n]>, and like C<.> but is not affected by the C</s> regex modifier.)
2984
2985This can lead to some ambiguities. When C<\N> is not followed immediately
2986by a left brace, Perl assumes the C<[^\n]> meaning. Also, if the braces
2987form a valid quantifier such as C<\N{3}> or C<\N{5,}>, Perl assumes that this
2988means to match the given quantity of non-newlines (in these examples,
29893; and 5 or more, respectively). In all other case, where there is a
2990C<\N{> and a matching C<}>, Perl assumes that a character name is desired.
2991
2992However, if there is no matching C<}>, Perl doesn't know if it was
2993mistakenly omitted, or if C<[^\n]{> was desired, and raises this error.
2994If you meant the former, add the right brace; if you meant the latter,
2995escape the brace with a backslash, like so: C<\N\{>
ab13f0c7 2996
d98d5fff 2997=item Missing right curly or square bracket
a0d0e21e 2998
be771a83
GS
2999(F) The lexer counted more opening curly or square brackets than closing
3000ones. As a general rule, you'll find it's missing near the place you
3001were last editing.
a0d0e21e 3002
6df41af2
GS
3003=item (Missing semicolon on previous line?)
3004
56da5a46
RGS
3005(S syntax) This is an educated guess made in conjunction with the message
3006"%s found where operator expected". Don't automatically put a semicolon on
6df41af2
GS
3007the previous line just because you saw this message.
3008
a0d0e21e
LW
3009=item Modification of a read-only value attempted
3010
3011(F) You tried, directly or indirectly, to change the value of a
5f05dabc 3012constant. You didn't, of course, try "2 = 1", because the compiler
a0d0e21e
LW
3013catches that. But an easy way to do the same thing is:
3014
3015 sub mod { $_[0] = 1 }
3016 mod(2);
3017
3018Another way is to assign to a substr() that's off the end of the string.
3019
c5674021
PDF
3020Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR>
3021is aliased to a constant in the look I<LIST>:
3022
b7e4ecc1
FC
3023 $x = 1;
3024 foreach my $n ($x, 2) {
3025 $n *= 2; # modifies the $x, but fails on attempt to
3026 } # modify the 2
c5674021 3027
7a4340ed 3028=item Modification of non-creatable array value attempted, %s
a0d0e21e
LW
3029
3030(F) You tried to make an array value spring into existence, and the
3031subscript was probably negative, even counting from end of the array
3032backwards.
3033
7a4340ed 3034=item Modification of non-creatable hash value attempted, %s
a0d0e21e 3035
be771a83
GS
3036(P) You tried to make a hash value spring into existence, and it
3037couldn't be created for some peculiar reason.
a0d0e21e
LW
3038
3039=item Module name must be constant
3040
3041(F) Only a bare module name is allowed as the first argument to a "use".
3042
be98fb35 3043=item Module name required with -%c option
6df41af2 3044
be98fb35
GS
3045(F) The C<-M> or C<-m> options say that Perl should load some module, but
3046you omitted the name of the module. Consult L<perlrun> for full details
3047about C<-M> and C<-m>.
6df41af2 3048
fe13d51d 3049=item More than one argument to '%s' open
ed9aa3b7 3050
6903afa2 3051(F) The C<open> function has been asked to open multiple files. This
ed9aa3b7
SG
3052can happen if you are trying to open a pipe to a command that takes a
3053list of arguments, but have forgotten to specify a piped open mode.
3054See L<perlfunc/open> for details.
3055
a0d0e21e
LW
3056=item msg%s not implemented
3057
3058(F) You don't have System V message IPC on your system.
3059
3060=item Multidimensional syntax %s not supported
3061
75b44862
GS
3062(W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>.
3063They're written like C<$foo[1][2][3]>, as in C.
8b1a09fc 3064
49704364 3065=item '/' must follow a numeric type in unpack
6df41af2 3066
49704364
LW
3067(F) You had an unpack template that contained a '/', but this did not
3068follow some unpack specification producing a numeric value.
3069See L<perlfunc/pack>.
6df41af2
GS
3070
3071=item "my sub" not yet implemented
3072
be771a83
GS
3073(F) Lexically scoped subroutines are not yet implemented. Don't try
3074that yet.
6df41af2 3075
fd1b7234 3076=item "my" variable %s can't be in a package
6df41af2 3077
be771a83
GS
3078(F) Lexically scoped variables aren't in a package, so it doesn't make
3079sense to try to declare one with a package qualifier on the front. Use
3080local() if you want to localize a package variable.
09bef843 3081
8149aa9f
FC
3082=item Name "%s::%s" used only once: possible typo
3083
3084(W once) Typographical errors often show up as unique variable names.
3085If you had a good reason for having a unique name, then just mention it
3086again somehow to suppress the message. The C<our> declaration is
3087provided for this purpose.
3088
3089NOTE: This warning detects symbols that have been used only once so $c, @c,
3090%c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered
3091the same; if a program uses $c only once but also uses any of the others it
3092will not trigger this warning.
3093
6fbc9859
MH
3094=item \N in a character class must be a named character: \N{...} in regex;
3095marked by <-- HERE in m/%s/
ff3f963a 3096
c3c41406 3097(F) The new (5.12) meaning of C<\N> as C<[^\n]> is not valid in a bracketed
f4e361c7
FC
3098character class, for the same reason that C<.> in a character class loses
3099its specialness: it matches almost everything, which is probably not
3100what you want.
c3c41406 3101
aec0ef10 3102=item \N{NAME} must be resolved by the lexer in regex; marked by <-- HERE in m/%s/
c3c41406 3103
f4e361c7
FC
3104(F) When compiling a regex pattern, an unresolved named character or
3105sequence was encountered. This can happen in any of several ways that
3106bypass the lexer, such as using single-quotish context, or an extra
7fae04b9 3107backslash in double-quotish:
c3c41406
KW
3108
3109 $re = '\N{SPACE}'; # Wrong!
b09c05e6 3110 $re = "\\N{SPACE}"; # Wrong!
c3c41406
KW
3111 /$re/;
3112
b09c05e6 3113Instead, use double-quotes with a single backslash:
c3c41406
KW
3114
3115 $re = "\N{SPACE}"; # ok
3116 /$re/;
3117
3118The lexer can be bypassed as well by creating the pattern from smaller
3119components:
3120
3121 $re = '\N';
3122 /${re}{SPACE}/; # Wrong!
3123
3124It's not a good idea to split a construct in the middle like this, and it
3125doesn't work here. Instead use the solution above.
3126
3127Finally, the message also can happen under the C</x> regex modifier when the
3128C<\N> is separated by spaces from the C<{>, in which case, remove the spaces.
3129
3130 /\N {SPACE}/x; # Wrong!
3131 /\N{SPACE}/x; # ok
ff3f963a 3132
0d0b4b3b
KW
3133=item Need exactly 3 octal digits in regex; marked by <-- HERE in m/%s/
3134
3135(F) Within S<C<(?[ ])>>, all constants interpreted as octal need to be
3136exactly 3 digits long. This helps catch some ambiguities. If your
3137constant is too short, add leading zeros, like
3138
3139 (?[ [ \078 ] ]) # Syntax error!
3140 (?[ [ \0078 ] ]) # Works
3141 (?[ [ \007 8 ] ]) # Clearer
3142
3143The maximum number this construct can express is C<\777>. If you
3144need a larger one, you need to use L<\o{}|perlrebackslash/Octal escapes>
3145instead. If you meant two separate things, you need to separate them
3146
3147 (?[ [ \7776 ] ]) # Syntax error!
3148 (?[ [ \o{7776} ] ]) # One meaning
3149 (?[ [ \777 6 ] ]) # Another meaning
3150 (?[ [ \777 \006 ] ]) # Still another
3151
49704364
LW
3152=item Negative '/' count in unpack
3153
3154(F) The length count obtained from a length/code unpack operation was
3155negative. See L<perlfunc/pack>.
3156
a0d0e21e
LW
3157=item Negative length
3158
be771a83
GS
3159(F) You tried to do a read/write/send/recv operation with a buffer
3160length that is less than 0. This is difficult to imagine.
a0d0e21e 3161
ed9aa3b7
SG
3162=item Negative offset to vec in lvalue context
3163
3164(F) When C<vec> is called in an lvalue context, the second argument must be
3165greater than or equal to zero.
3166
7253e4e3 3167=item Nested quantifiers in regex; marked by <-- HERE in m/%s/
a0d0e21e 3168
6903afa2 3169(F) You can't quantify a quantifier without intervening parentheses.
9e3ec65c
FC
3170So things like ** or +* or ?* are illegal. The <-- HERE shows
3171whereabouts in the regular expression the problem was discovered.
a0d0e21e 3172
7253e4e3 3173Note that the minimal matching quantifiers, C<*?>, C<+?>, and
be771a83 3174C<??> appear to be nested quantifiers, but aren't. See L<perlre>.
a0d0e21e 3175
6df41af2 3176=item %s never introduced
a0d0e21e 3177
be771a83
GS
3178(S internal) The symbol in question was declared but somehow went out of
3179scope before it could possibly have been used.
a0d0e21e 3180
2c7d6b9c
RGS
3181=item next::method/next::can/maybe::next::method cannot find enclosing method
3182
3183(F) C<next::method> needs to be called within the context of a
3184real method in a real package, and it could not find such a context.
3185See L<mro>.
3186
a0d0e21e
LW
3187=item No %s allowed while running setuid
3188
be771a83
GS
3189(F) Certain operations are deemed to be too insecure for a setuid or
3190setgid script to even be allowed to attempt. Generally speaking there
3191will be another way to do what you want that is, if not secure, at least
3192securable. See L<perlsec>.
a0d0e21e 3193
6651ba0b
FC
3194=item No code specified for -%c
3195
3196(F) Perl's B<-e> and B<-E> command-line options require an argument. If
3197you want to run an empty program, pass the empty string as a separate
3198argument or run a program consisting of a single 0 or 1:
3199
3200 perl -e ""
3201 perl -e0
3202 perl -e1
3203
a0d0e21e
LW
3204=item No comma allowed after %s
3205
6903afa2
FC
3206(F) A list operator that has a filehandle or "indirect object" is
3207not allowed to have a comma between that and the following arguments.
a0d0e21e
LW
3208Otherwise it'd be just another one of the arguments.
3209
6903afa2
FC
3210One possible cause for this is that you expected to have imported
3211a constant to your name space with B<use> or B<import> while no such
3212importing took place, it may for example be that your operating
3213system does not support that particular constant. Hopefully you did
3214use an explicit import list for the constants you expect to see;
3215please see L<perlfunc/use> and L<perlfunc/import>. While an
3216explicit import list would probably have caught this error earlier
3217it naturally does not remedy the fact that your operating system
3218still does not support that constant. Maybe you have a typo in
3219the constants of the symbol import list of B<use> or B<import> or in the
3220constant name at the line where this error was triggered?
0a753a76 3221
748a9306
LW
3222=item No command into which to pipe on command line
3223
be771a83
GS
3224(F) An error peculiar to VMS. Perl handles its own command line
3225redirection, and found a '|' at the end of the command line, so it
3226doesn't know where you want to pipe the output from this command.
748a9306 3227
a0d0e21e
LW
3228=item No DB::DB routine defined
3229
be771a83 3230(F) The currently executing code was compiled with the B<-d> switch, but
f7af5ce1 3231for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
ccafdc96
RGS
3232module) didn't define a routine to be called at the beginning of each
3233statement.
a0d0e21e
LW
3234
3235=item No dbm on this machine
3236
3237(P) This is counted as an internal error, because every machine should
5f05dabc 3238supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
a0d0e21e 3239
ccafdc96 3240=item No DB::sub routine defined
a0d0e21e 3241
ccafdc96
RGS
3242(F) The currently executing code was compiled with the B<-d> switch, but
3243for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
3244module) didn't define a C<DB::sub> routine to be called at the beginning
3245of each ordinary subroutine call.
a0d0e21e 3246
6651ba0b
FC
3247=item No directory specified for -I
3248
3249(F) The B<-I> command-line switch requires a directory name as part of the
3250I<same> argument. Use B<-Ilib>, for instance. B<-I lib> won't work.
3251
c47ff5f1 3252=item No error file after 2> or 2>> on command line
748a9306 3253
be771a83
GS
3254(F) An error peculiar to VMS. Perl handles its own command line
3255redirection, and found a '2>' or a '2>>' on the command line, but can't
3256find the name of the file to which to write data destined for stderr.
748a9306 3257
49704364
LW
3258=item No group ending character '%c' found in template
3259
3260(F) A pack or unpack template has an opening '(' or '[' without its
6903afa2 3261matching counterpart. See L<perlfunc/pack>.
49704364 3262
c47ff5f1 3263=item No input file after < on command line
748a9306 3264
be771a83
GS
3265(F) An error peculiar to VMS. Perl handles its own command line
3266redirection, and found a '<' on the command line, but can't find the
3267name of the file from which to read data for stdin.
748a9306 3268
2c7d6b9c
RGS
3269=item No next::method '%s' found for %s
3270
3271(F) C<next::method> found no further instances of this method name
3272in the remaining packages of the MRO of this class. If you don't want
3273it throwing an exception, use C<maybe::next::method>
fa816bf3 3274or C<next::can>. See L<mro>.
2c7d6b9c 3275
6df41af2
GS
3276=item "no" not allowed in expression
3277
be771a83
GS
3278(F) The "no" keyword is recognized and executed at compile time, and
3279returns no useful value. See L<perlmod>.
6df41af2 3280
c47ff5f1 3281=item No output file after > on command line
748a9306 3282
be771a83
GS
3283(F) An error peculiar to VMS. Perl handles its own command line
3284redirection, and found a lone '>' at the end of the command line, so it
3285doesn't know where you wanted to redirect stdout.
748a9306 3286
c47ff5f1 3287=item No output file after > or >> on command line
748a9306 3288
be771a83
GS
3289(F) An error peculiar to VMS. Perl handles its own command line
3290redirection, and found a '>' or a '>>' on the command line, but can't
3291find the name of the file to which to write data destined for stdout.
748a9306 3292
1ec3e8de
GS
3293=item No package name allowed for variable %s in "our"
3294
be771a83
GS
3295(F) Fully qualified variable names are not allowed in "our"
3296declarations, because that doesn't make much sense under existing
3297semantics. Such syntax is reserved for future extensions.
1ec3e8de 3298
a0d0e21e
LW
3299=item No Perl script found in input
3300
3301(F) You called C<perl -x>, but no line was found in the file beginning
3302with #! and containing the word "perl".
3303
3304=item No setregid available
3305
3306(F) Configure didn't find anything resembling the setregid() call for
3307your system.