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Change the warning for $* to add ", and will become a syntax error".
[perl5.git] / pod / perldiag.pod
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1=head1 NAME
2
3perldiag - various Perl diagnostics
4
5=head1 DESCRIPTION
6
7These messages are classified as follows (listed in increasing order of
8desperation):
9
10 (W) A warning (optional).
d1d15184 11 (D) A deprecation (enabled by default).
00eb3f2b 12 (S) A severe warning (enabled by default).
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13 (F) A fatal error (trappable).
14 (P) An internal error you should never see (trappable).
54310121 15 (X) A very fatal error (nontrappable).
cb1a09d0 16 (A) An alien error message (not generated by Perl).
a0d0e21e 17
75b44862 18The majority of messages from the first three classifications above
64977eb6 19(W, D & S) can be controlled using the C<warnings> pragma.
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20
21If a message can be controlled by the C<warnings> pragma, its warning
22category is included with the classification letter in the description
466416ed 23below. E.g. C<(W closed)> means a warning in the C<closed> category.
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24
25Optional warnings are enabled by using the C<warnings> pragma or the B<-w>
fa816bf3 26and B<-W> switches. Warnings may be captured by setting C<$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
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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
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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
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MHM
59(F) The modifiers '!', '<' and '>' are allowed in pack() or unpack() only
60after certain types. See L<perlfunc/pack>.
ef54e1a4 61
6df41af2 62=item Ambiguous call resolved as CORE::%s(), qualify as such or use &
43192e07 63
75b44862 64(W ambiguous) A subroutine you have declared has the same name as a Perl
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65keyword, and you have used the name without qualification for calling
66one or the other. Perl decided to call the builtin because the
67subroutine is not imported.
43192e07 68
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69To force interpretation as a subroutine call, either put an ampersand
70before the subroutine name, or qualify the name with its package.
71Alternatively, you can import the subroutine (or pretend that it's
72imported with the C<use subs> pragma).
43192e07 73
6df41af2 74To silently interpret it as the Perl operator, use the C<CORE::> prefix
496a33f5 75on the operator (e.g. C<CORE::log($x)>) or declare the subroutine
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76to be an object method (see L<perlsub/"Subroutine Attributes"> or
77L<attributes>).
43192e07 78
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79=item Ambiguous range in transliteration operator
80
81(F) You wrote something like C<tr/a-z-0//> which doesn't mean anything at
82all. To include a C<-> character in a transliteration, put it either
83first or last. (In the past, C<tr/a-z-0//> was synonymous with
84C<tr/a-y//>, which was probably not what you would have expected.)
85
6df41af2 86=item Ambiguous use of %s resolved as %s
43192e07 87
7c7af292 88(S ambiguous) You said something that may not be interpreted the way
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89you thought. Normally it's pretty easy to disambiguate it by supplying
90a missing quote, operator, parenthesis pair or declaration.
a0d0e21e 91
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92=item Ambiguous use of %c resolved as operator %c
93
7c7af292 94(S ambiguous) C<%>, C<&>, and C<*> are both infix operators (modulus,
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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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FC
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
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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
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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
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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
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391(F) You passed a buffer of the wrong size to one of msgctl(), semctl()
392or shmctl(). In C parlance, the correct sizes are, respectively,
5f05dabc 393S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and
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394S<sizeof(struct shmid_ds *)>.
395
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396=item Bad evalled substitution pattern
397
496a33f5 398(F) You've used the C</e> switch to evaluate the replacement for a
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399substitution, but perl found a syntax error in the code to evaluate,
400most likely an unexpected right brace '}'.
401
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402=item Bad filehandle: %s
403
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404(F) A symbol was passed to something wanting a filehandle, but the
405symbol has no filehandle associated with it. Perhaps you didn't do an
406open(), or did it in another package.
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407
408=item Bad free() ignored
409
be771a83 410(S malloc) An internal routine called free() on something that had never
fa816bf3 411been malloc()ed in the first place. Mandatory, but can be disabled by
9ea8bc6d 412setting environment variable C<PERL_BADFREE> to 0.
33c8a3fe 413
9ea8bc6d 414This message can be seen quite often with DB_File on systems with "hard"
6903afa2 415dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB>
be771a83 416which is left unnoticed if C<DB> uses I<forgiving> system malloc().
a0d0e21e 417
aa689395
PP
418=item Bad hash
419
420(P) One of the internal hash routines was passed a null HV pointer.
421
6df41af2
GS
422=item Badly placed ()'s
423
424(A) You've accidentally run your script through B<csh> instead
425of Perl. Check the #! line, or manually feed your script into
426Perl yourself.
427
a7cb8dae 428=item Bad name after %s
a0d0e21e 429
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430(F) You started to name a symbol by using a package prefix, and then
431didn't finish the symbol. In particular, you can't interpolate outside
432of quotes, so
a0d0e21e
LW
433
434 $var = 'myvar';
435 $sym = mypack::$var;
436
437is not the same as
438
439 $var = 'myvar';
440 $sym = "mypack::$var";
441
88e1f1a2
JV
442=item Bad plugin affecting keyword '%s'
443
444(F) An extension using the keyword plugin mechanism violated the
445plugin API.
446
4ad56ec9
IZ
447=item Bad realloc() ignored
448
6903afa2
FC
449(S malloc) An internal routine called realloc() on something that
450had never been malloc()ed in the first place. Mandatory, but can
451be disabled by setting the environment variable C<PERL_BADFREE> to 1.
4ad56ec9 452
a0d0e21e
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453=item Bad symbol for array
454
455(P) An internal request asked to add an array entry to something that
456wasn't a symbol table entry.
457
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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.
a0d0e21e
LW
467
468=item Bad symbol for hash
469
470(P) An internal request asked to add a hash entry to something that
471wasn't a symbol table entry.
472
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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
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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
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494
495=item Bareword "%s" refers to nonexistent package
496
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497(W bareword) You used a qualified bareword of the form C<Foo::>, but the
498compiler saw no other uses of that namespace before that point. Perhaps
499you need to predeclare a package?
6df41af2 500
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501=item BEGIN failed--compilation aborted
502
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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
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515=item \1 better written as $1
516
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GS
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.
79ef86ee 1314It is planned to make this fatal in all instances in Perl 5.18. 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
1318Note that non-alphabetic ASCII characters are discouraged here as well.
f9d13529 1319
f337b084 1320=item Character in 'C' format wrapped in pack
ac7cd81a
SC
1321
1322(W pack) You said
1323
1324 pack("C", $x)
1325
1326where $x is either less than 0 or more than 255; the C<"C"> format is
1327only for encoding native operating system characters (ASCII, EBCDIC,
1328and so on) and not for Unicode characters, so Perl behaved as if you meant
1329
1330 pack("C", $x & 255)
1331
1332If you actually want to pack Unicode codepoints, use the C<"U"> format
1333instead.
1334
f337b084
TH
1335=item Character in 'W' format wrapped in pack
1336
1337(W pack) You said
1338
1339 pack("U0W", $x)
1340
6903afa2
FC
1341where $x is either less than 0 or more than 255. However, C<U0>-mode
1342expects all values to fall in the interval [0, 255], so Perl behaved
1343as if you meant:
f337b084
TH
1344
1345 pack("U0W", $x & 255)
1346
1347=item Character in 'c' format wrapped in pack
ac7cd81a
SC
1348
1349(W pack) You said
1350
1351 pack("c", $x)
1352
1353where $x is either less than -128 or more than 127; the C<"c"> format
1354is only for encoding native operating system characters (ASCII, EBCDIC,
1355and so on) and not for Unicode characters, so Perl behaved as if you meant
1356
1357 pack("c", $x & 255);
1358
1359If you actually want to pack Unicode codepoints, use the C<"U"> format
1360instead.
1361
f337b084
TH
1362=item Character in '%c' format wrapped in unpack
1363
1364(W unpack) You tried something like
1365
1366 unpack("H", "\x{2a1}")
1367
1a147d38 1368where the format expects to process a byte (a character with a value
6903afa2
FC
1369below 256), but a higher value was provided instead. Perl uses the
1370value modulus 256 instead, as if you had provided:
f337b084
TH
1371
1372 unpack("H", "\x{a1}")
1373
1374=item Character(s) in '%c' format wrapped in pack
1375
1376(W pack) You tried something like
1377
1378 pack("u", "\x{1f3}b")
1379
1a147d38 1380where the format expects to process a sequence of bytes (character with a
6903afa2 1381value below 256), but some of the characters had a higher value. Perl
f337b084
TH
1382uses the character values modulus 256 instead, as if you had provided:
1383
1384 pack("u", "\x{f3}b")
1385
1386=item Character(s) in '%c' format wrapped in unpack
1387
1388(W unpack) You tried something like
1389
1390 unpack("s", "\x{1f3}b")
1391
1a147d38 1392where the format expects to process a sequence of bytes (character with a
6903afa2 1393value below 256), but some of the characters had a higher value. Perl
f337b084
TH
1394uses the character values modulus 256 instead, as if you had provided:
1395
1396 unpack("s", "\x{f3}b")
1397
f866a7cd
FC
1398=item "\c{" is deprecated and is more clearly written as ";"
1399
1400(D deprecated, syntax) The C<\cI<X>> construct is intended to be a way
1401to specify non-printable characters. You used it with a "{" which
1402evaluates to ";", which is printable. It is planned to remove the
79ef86ee 1403ability to specify a semi-colon this way in Perl 5.18. Just use a
f866a7cd
FC
1404semi-colon or a backslash-semi-colon without the "\c".
1405
1406=item "\c%c" is more clearly written simply as "%s"
1407
1408(W syntax) The C<\cI<X>> construct is intended to be a way to specify
1409non-printable characters. You used it for a printable one, which is better
1410written as simply itself, perhaps preceded by a backslash for non-word
1411characters.
1412
6651ba0b
FC
1413=item Cloning substitution context is unimplemented
1414
1415(F) Creating a new thread inside the C<s///> operator is not supported.
1416
96ebfdd7
RK
1417=item close() on unopened filehandle %s
1418
1419(W unopened) You tried to close a filehandle that was never opened.
1420
abc7ecad
SP
1421=item closedir() attempted on invalid dirhandle %s
1422
1423(W io) The dirhandle you tried to close is either closed or not really
1424a dirhandle. Check your control flow.
1425
541ed3a9
FC
1426=item Closure prototype called
1427
1428(F) If a closure has attributes, the subroutine passed to an attribute
1429handler is the prototype that is cloned when a new closure is created.
1430This subroutine cannot be called.
1431
49704364
LW
1432=item Code missing after '/'
1433
6903afa2
FC
1434(F) You had a (sub-)template that ends with a '/'. There must be
1435another template code following the slash. See L<perlfunc/pack>.
49704364 1436
0876b9a0
KW
1437=item Code point 0x%X is not Unicode, may not be portable
1438
6fbc9859
MH
1439=item Code point 0x%X is not Unicode, all \p{} matches fail; all \P{} matches
1440succeed
9ae3ac1a 1441
e2f4a215 1442(S utf8, non_unicode) You had a code point above the Unicode maximum
1b64326b
FC
1443of U+10FFFF.
1444
1445Perl allows strings to contain a superset of Unicode code points, up
1446to the limit of what is storable in an unsigned integer on your system,
1447but these may not be accepted by other languages/systems. At one time,
1448it was legal in some standards to have code points up to 0x7FFF_FFFF,
1449but not higher. Code points above 0xFFFF_FFFF require larger than a
145032 bit word.
0876b9a0 1451
9ae3ac1a
KW
1452None of the Unicode or Perl-defined properties will match a non-Unicode
1453code point. For example,
1454
1455 chr(0x7FF_FFFF) =~ /\p{Any}/
1456
1457will not match, because the code point is not in Unicode. But
1458
1459 chr(0x7FF_FFFF) =~ /\P{Any}/
1460
1461will match.
1462
94b42e47
KW
1463This may be counterintuitive at times, as both these fail:
1464
f9d4ccdc
FC
1465 chr(0x110000) =~ /\p{ASCII_Hex_Digit=True}/ # Fails.
1466 chr(0x110000) =~ /\p{ASCII_Hex_Digit=False}/ # Also fails!
94b42e47
KW
1467
1468and both these succeed:
1469
f9d4ccdc
FC
1470 chr(0x110000) =~ /\P{ASCII_Hex_Digit=True}/ # Succeeds.
1471 chr(0x110000) =~ /\P{ASCII_Hex_Digit=False}/ # Also succeeds!
94b42e47 1472
6df41af2
GS
1473=item %s: Command not found
1474
a892b81a
FC
1475(A) You've accidentally run your script through B<csh> or another shell
1476shell instead of Perl. Check the #! line, or manually feed your script
1477into Perl yourself. The #! line at the top of your file could look like
8f721816
MM
1478
1479 #!/usr/bin/perl -w
6df41af2 1480
7a2e2cd6
PP
1481=item Compilation failed in require
1482
1483(F) Perl could not compile a file specified in a C<require> statement.
be771a83
GS
1484Perl uses this generic message when none of the errors that it
1485encountered were severe enough to halt compilation immediately.
7a2e2cd6 1486
c3464db5
DD
1487=item Complex regular subexpression recursion limit (%d) exceeded
1488
be771a83
GS
1489(W regexp) The regular expression engine uses recursion in complex
1490situations where back-tracking is required. Recursion depth is limited
1491to 32766, or perhaps less in architectures where the stack cannot grow
1492arbitrarily. ("Simple" and "medium" situations are handled without
1493recursion and are not subject to a limit.) Try shortening the string
1494under examination; looping in Perl code (e.g. with C<while>) rather than
1495in the regular expression engine; or rewriting the regular expression so
c2e66d9e 1496that it is simpler or backtracks less. (See L<perlfaq2> for information
be771a83 1497on I<Mastering Regular Expressions>.)
c3464db5 1498
38875929
DM
1499=item cond_broadcast() called on unlocked variable
1500
6903afa2
FC
1501(W threads) Within a thread-enabled program, you tried to
1502call cond_broadcast() on a variable which wasn't locked.
1503The cond_broadcast() function is used to wake up another thread
1504that is waiting in a cond_wait(). To ensure that the signal isn't
1505sent before the other thread has a chance to enter the wait, it
1506is usual for the signaling thread first to wait for a lock on
1507variable. This lock attempt will only succeed after the other
1508thread has entered cond_wait() and thus relinquished the lock.
38875929 1509
38875929
DM
1510=item cond_signal() called on unlocked variable
1511
6903afa2
FC
1512(W threads) Within a thread-enabled program, you tried to
1513call cond_signal() on a variable which wasn't locked. The
1514cond_signal() function is used to wake up another thread that
1515is waiting in a cond_wait(). To ensure that the signal isn't
1516sent before the other thread has a chance to enter the wait, it
1517is usual for the signaling thread first to wait for a lock on
1518variable. This lock attempt will only succeed after the other
1519thread has entered cond_wait() and thus relinquished the lock.
38875929 1520
69282e91 1521=item connect() on closed socket %s
a0d0e21e 1522
be771a83
GS
1523(W closed) You tried to do a connect on a closed socket. Did you forget
1524to check the return value of your socket() call? See
1525L<perlfunc/connect>.
a0d0e21e 1526
e21e7c6a
FC
1527=item Constant(%s): Call to &{$^H{%s}} did not return a defined value
1528
1529(F) The subroutine registered to handle constant overloading
1530(see L<overload>) or a custom charnames handler (see
1531L<charnames/CUSTOM TRANSLATORS>) returned an undefined value.
1532
1533=item Constant(%s): $^H{%s} is not defined
1534
1535(F) The parser found inconsistencies while attempting to define an
1536overloaded constant. Perhaps you forgot to load the corresponding
1537L<overload> pragma?.
1538
1539=item Constant(%s) unknown
6df41af2 1540
be771a83
GS
1541(F) The parser found inconsistencies either while attempting to define
1542an overloaded constant, or when trying to find the character name
1543specified in the C<\N{...}> escape. Perhaps you forgot to load the
fbb93542 1544corresponding L<overload> pragma?.
6df41af2 1545
779c5bc9
GS
1546=item Constant is not %s reference
1547
1548(F) A constant value (perhaps declared using the C<use constant> pragma)
be771a83 1549is being dereferenced, but it amounts to the wrong type of reference.
6903afa2 1550The message indicates the type of reference that was expected. This
be771a83 1551usually indicates a syntax error in dereferencing the constant value.
779c5bc9
GS
1552See L<perlsub/"Constant Functions"> and L<constant>.
1553
4cee8e80
CS
1554=item Constant subroutine %s redefined
1555
aeb94125
FC
1556(W redefine)(S) You redefined a subroutine which had previously
1557been eligible for inlining. See L<perlsub/"Constant Functions">
1558for commentary and workarounds.
4cee8e80 1559
9607fc9c
PP
1560=item Constant subroutine %s undefined
1561
be771a83
GS
1562(W misc) You undefined a subroutine which had previously been eligible
1563for inlining. See L<perlsub/"Constant Functions"> for commentary and
1564workarounds.
9607fc9c 1565
e7ea3e70
IZ
1566=item Copy method did not return a reference
1567
6903afa2 1568(F) The method which overloads "=" is buggy. See
13a2d996 1569L<overload/Copy Constructor>.
e7ea3e70 1570
4aaa4757
FC
1571=item &CORE::%s cannot be called directly
1572
1573(F) You tried to call a subroutine in the C<CORE::> namespace
8d605c0d 1574with C<&foo> syntax or through a reference. Some subroutines
4aaa4757
FC
1575in this package cannot yet be called that way, but must be
1576called as barewords. Something like this will work:
1577
1578 BEGIN { *shove = \&CORE::push; }
1579 shove @array, 1,2,3; # pushes on to @array
1580
6798c92b
GS
1581=item CORE::%s is not a keyword
1582
1583(F) The CORE:: namespace is reserved for Perl keywords.
1584
a0d0e21e
LW
1585=item corrupted regexp pointers
1586
1587(P) The regular expression engine got confused by what the regular
1588expression compiler gave it.
1589
1590=item corrupted regexp program
1591
be771a83
GS
1592(P) The regular expression engine got passed a regexp program without a
1593valid magic number.
a0d0e21e 1594
de42a5a9 1595=item Corrupt malloc ptr 0x%x at 0x%x
6df41af2
GS
1596
1597(P) The malloc package that comes with Perl had an internal failure.
1598
c608e803
KW
1599=item Corrupted regexp opcode %d > %d
1600
1601(F)
1602This is either an error in Perl, or, if you're using one, your
1603L<custom regular expression engine|perlreapi>. If not the latter,
1604report the problem through the L<perlbug> utility.
1605
49704364
LW
1606=item Count after length/code in unpack
1607
1608(F) You had an unpack template indicating a counted-length string, but
1609you have also specified an explicit size for the string. See
1610L<perlfunc/pack>.
1611
6651ba0b
FC
1612=item Deep recursion on anonymous subroutine
1613
a0d0e21e
LW
1614=item Deep recursion on subroutine "%s"
1615
be771a83
GS
1616(W recursion) This subroutine has called itself (directly or indirectly)
1617100 times more than it has returned. This probably indicates an
1618infinite recursion, unless you're writing strange benchmark programs, in
1619which case it indicates something else.
a0d0e21e 1620
aad1d01f
NC
1621This threshold can be changed from 100, by recompiling the F<perl> binary,
1622setting the C pre-processor macro C<PERL_SUB_DEPTH_WARN> to the desired value.
1623
f10b0346 1624=item defined(@array) is deprecated
69794302 1625
be771a83
GS
1626(D deprecated) defined() is not usually useful on arrays because it
1627checks for an undefined I<scalar> value. If you want to see if the
64977eb6 1628array is empty, just use C<if (@array) { # not empty }> for example.
69794302 1629
f10b0346 1630=item defined(%hash) is deprecated
69794302 1631
f0ec9725
KR
1632(D deprecated) C<defined()> is not usually right on hashes and has been
1633discouraged since 5.004.
1634
1635Although C<defined %hash> is false on a plain not-yet-used hash, it
1636becomes true in several non-obvious circumstances, including iterators,
1637weak references, stash names, even remaining true after C<undef %hash>.
1638These things make C<defined %hash> fairly useless in practice.
1639
1640If a check for non-empty is what you wanted then just put it in boolean
1641context (see L<perldata/Scalar values>):
16546e45
KR
1642
1643 if (%hash) {
1644 # not empty
1645 }
1646
f0ec9725
KR
1647If you had C<defined %Foo::Bar::QUUX> to check whether such a package
1648variable exists then that's never really been reliable, and isn't
1649a good way to enquire about the features of a package, or whether
1650it's loaded, etc.
1651
69794302 1652
6fbc9859
MH
1653=item (?(DEFINE)....) does not allow branches in regex; marked by <-- HERE in
1654m/%s/
bcb95744 1655
6903afa2 1656(F) You used something like C<(?(DEFINE)...|..)> which is illegal. The
bcb95744
FC
1657most likely cause of this error is that you left out a parenthesis inside
1658of the C<....> part.
1659
9e3ec65c 1660The <-- HERE shows whereabouts in the regular expression the problem was
bcb95744
FC
1661discovered.
1662
62658f4d
PM
1663=item %s defines neither package nor VERSION--version check failed
1664
1665(F) You said something like "use Module 42" but in the Module file
1666there are neither package declarations nor a C<$VERSION>.
1667
fc36a67e
PP
1668=item Delimiter for here document is too long
1669
be771a83
GS
1670(F) In a here document construct like C<<<FOO>, the label C<FOO> is too
1671long for Perl to handle. You have to be seriously twisted to write code
1672that triggers this error.
fc36a67e 1673
6d3b25aa
RGS
1674=item Deprecated use of my() in false conditional
1675
fa816bf3
FC
1676(D deprecated) You used a declaration similar to C<my $x if 0>. There
1677has been a long-standing bug in Perl that causes a lexical variable
6d3b25aa 1678not to be cleared at scope exit when its declaration includes a false
6903afa2 1679conditional. Some people have exploited this bug to achieve a kind of
fa816bf3 1680static variable. Since we intend to fix this bug, we don't want people
6903afa2 1681relying on this behavior. You can achieve a similar static effect by
6d3b25aa 1682declaring the variable in a separate block outside the function, eg
36fb85f3 1683
6d3b25aa
RGS
1684 sub f { my $x if 0; return $x++ }
1685
1686becomes
1687
1688 { my $x; sub f { return $x++ } }
1689
fa816bf3
FC
1690Beginning with perl 5.9.4, you can also use C<state> variables to have
1691lexicals that are initialized only once (see L<feature>):
36fb85f3
RGS
1692
1693 sub f { state $x; return $x++ }
1694
500ab966
RGS
1695=item DESTROY created new reference to dead object '%s'
1696
1697(F) A DESTROY() method created a new reference to the object which is
6903afa2
FC
1698just being DESTROYed. Perl is confused, and prefers to abort rather
1699than to create a dangling reference.
500ab966 1700
3cdd684c
TP
1701=item Did not produce a valid header
1702
1703See Server error.
1704
6df41af2
GS
1705=item %s did not return a true value
1706
1707(F) A required (or used) file must return a true value to indicate that
1708it compiled correctly and ran its initialization code correctly. It's
1709traditional to end such a file with a "1;", though any true value would
1710do. See L<perlfunc/require>.
1711
cc507455 1712=item (Did you mean &%s instead?)
4633a7c4 1713
413ff9f6
FC
1714(W misc) You probably referred to an imported subroutine &FOO as $FOO or
1715some such.
4633a7c4 1716
cc507455 1717=item (Did you mean "local" instead of "our"?)
33633739 1718
be771a83
GS
1719(W misc) Remember that "our" does not localize the declared global
1720variable. You have declared it again in the same lexical scope, which
1721seems superfluous.
33633739 1722
cc507455 1723=item (Did you mean $ or @ instead of %?)
a0d0e21e 1724
be771a83
GS
1725(W) You probably said %hash{$key} when you meant $hash{$key} or
1726@hash{@keys}. On the other hand, maybe you just meant %hash and got
1727carried away.
748a9306 1728
7e1af8bc 1729=item Died
5f05dabc
PP
1730
1731(F) You passed die() an empty string (the equivalent of C<die "">) or
075b00aa 1732you called it with no args and C<$@> was empty.
5f05dabc 1733
3cdd684c
TP
1734=item Document contains no data
1735
1736See Server error.
1737
62658f4d
PM
1738=item %s does not define %s::VERSION--version check failed
1739
1740(F) You said something like "use Module 42" but the Module did not
943fc58e 1741define a C<$VERSION>.
62658f4d 1742
49704364
LW
1743=item '/' does not take a repeat count
1744
1745(F) You cannot put a repeat count of any kind right after the '/' code.
1746See L<perlfunc/pack>.
1747
a0d0e21e
LW
1748=item Don't know how to handle magic of type '%s'
1749
1750(P) The internal handling of magical variables has been cursed.
1751
1752=item do_study: out of memory
1753
1754(P) This should have been caught by safemalloc() instead.
1755
6df41af2
GS
1756=item (Do you need to predeclare %s?)
1757
56da5a46
RGS
1758(S syntax) This is an educated guess made in conjunction with the message
1759"%s found where operator expected". It often means a subroutine or module
6df41af2
GS
1760name is being referenced that hasn't been declared yet. This may be
1761because of ordering problems in your file, or because of a missing
be771a83
GS
1762"sub", "package", "require", or "use" statement. If you're referencing
1763something that isn't defined yet, you don't actually have to define the
1764subroutine or package before the current location. You can use an empty
1765"sub foo;" or "package FOO;" to enter a "forward" declaration.
6df41af2 1766
ac206dc8
RGS
1767=item dump() better written as CORE::dump()
1768
1769(W misc) You used the obsolescent C<dump()> built-in function, without fully
1770qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>.
1771
84d78eb7
YO
1772=item dump is not supported
1773
1774(F) Your machine doesn't support dump/undump.
1775
a0d0e21e
LW
1776=item Duplicate free() ignored
1777
be771a83
GS
1778(S malloc) An internal routine called free() on something that had
1779already been freed.
a0d0e21e 1780
1109a392
MHM
1781=item Duplicate modifier '%c' after '%c' in %s
1782
35f0cd76
FC
1783(W unpack) You have applied the same modifier more than once after a
1784type in a pack template. See L<perlfunc/pack>.
1109a392 1785
4633a7c4
LW
1786=item elseif should be elsif
1787
fa816bf3
FC
1788(S syntax) There is no keyword "elseif" in Perl because Larry thinks
1789it's ugly. Your code will be interpreted as an attempt to call a method
1790named "elseif" for the class returned by the following block. This is
4633a7c4
LW
1791unlikely to be what you want.
1792
c608e803 1793=item Empty \%c{} in regex; marked by <-- HERE in m/%s/
ab13f0c7 1794
af6f566e 1795(F) C<\p> and C<\P> are used to introduce a named Unicode property, as
6903afa2 1796described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in
af6f566e 1797a regular expression without specifying the property name.
ab13f0c7 1798
85ab1d1d 1799=item entering effective %s failed
5ff3f7a4 1800
85ab1d1d 1801(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1802effective uids or gids failed.
1803
c038024b
RGS
1804=item %ENV is aliased to %s
1805
1806(F) You're running under taint mode, and the C<%ENV> variable has been
1807aliased to another hash, so it doesn't reflect anymore the state of the
6903afa2 1808program's environment. This is potentially insecure.
c038024b 1809
748a9306
LW
1810=item Error converting file specification %s
1811
5f05dabc 1812(F) An error peculiar to VMS. Because Perl may have to deal with file
748a9306 1813specifications in either VMS or Unix syntax, it converts them to a
be771a83
GS
1814single form when it must operate on them directly. Either you've passed
1815an invalid file specification to Perl, or you've found a case the
1816conversion routines don't handle. Drat.
748a9306 1817
ff56e4f1
KW
1818=item Escape literal pattern white space under /x
1819
1820(D deprecated) You compiled a regular expression pattern with C</x> to
1821ignore white space, and you used, as a literal, one of the characters
1822that Perl plans to eventually treat as white space. The character must
1823be escaped somehow, or it will work differently on a future Perl that
1824does treat it as white space. The easiest way is to insert a backslash
1825immediately before it, or to enclose it with square brackets. This
1826change is to bring Perl into conformance with Unicode recommendations.
1827Here are the five characters that generate this warning:
1828U+0085 NEXT LINE,
1829U+200E LEFT-TO-RIGHT MARK,
1830U+200F RIGHT-TO-LEFT MARK,
1831U+2028 LINE SEPARATOR,
1832and
1833U+2029 PARAGRAPH SEPARATOR.
1834
ad19ef22 1835=item Eval-group in insecure regular expression
e4d48cc9 1836
be771a83
GS
1837(F) Perl detected tainted data when trying to compile a regular
1838expression that contains the C<(?{ ... })> zero-width assertion, which
1839is unsafe. See L<perlre/(?{ code })>, and L<perlsec>.
e4d48cc9 1840
ad19ef22 1841=item Eval-group not allowed at runtime, use re 'eval' in regex m/%s/
e4d48cc9 1842
be771a83
GS
1843(F) Perl tried to compile a regular expression containing the
1844C<(?{ ... })> zero-width assertion at run time, as it would when the
f11307f5
FC
1845pattern contains interpolated values. Since that is a security risk,
1846it is not allowed. If you insist, you may still do this by using the
1847C<re 'eval'> pragma or by explicitly building the pattern from an
1848interpolated string at run time and using that in an eval(). See
1849L<perlre/(?{ code })>.
e4d48cc9 1850
ad19ef22 1851=item Eval-group not allowed, use re 'eval' in regex m/%s/
6df41af2 1852
be771a83
GS
1853(F) A regular expression contained the C<(?{ ... })> zero-width
1854assertion, but that construct is only allowed when the C<use re 'eval'>
1855pragma is in effect. See L<perlre/(?{ code })>.
6df41af2 1856
6fbc9859
MH
1857=item EVAL without pos change exceeded limit in regex; marked by <-- HERE in
1858m/%s/
1a147d38
YO
1859
1860(F) You used a pattern that nested too many EVAL calls without consuming
6903afa2 1861any text. Restructure the pattern so that text is consumed.
1a147d38 1862
9e3ec65c 1863The <-- HERE shows whereabouts in the regular expression the problem was
1a147d38
YO
1864discovered.
1865
fc36a67e
PP
1866=item Excessively long <> operator
1867
1868(F) The contents of a <> operator may not exceed the maximum size of a
1869Perl identifier. If you're just trying to glob a long list of
1870filenames, try using the glob() operator, or put the filenames into a
1871variable and glob that.
1872
ed9aa3b7
SG
1873=item exec? I'm not *that* kind of operating system
1874
af8bb25a 1875(F) The C<exec> function is not implemented on some systems, e.g., Symbian
6903afa2 1876OS. See L<perlport>.
ed9aa3b7 1877
fe13d51d 1878=item Execution of %s aborted due to compilation errors.
a0d0e21e
LW
1879
1880(F) The final summary message when a Perl compilation fails.
1881
1882=item Exiting eval via %s
1883
be771a83
GS
1884(W exiting) You are exiting an eval by unconventional means, such as a
1885goto, or a loop control statement.
e476b1b5
GS
1886
1887=item Exiting format via %s
1888
9a2ff54b 1889(W exiting) You are exiting a format by unconventional means, such as a
be771a83 1890goto, or a loop control statement.
a0d0e21e 1891
0a753a76
PP
1892=item Exiting pseudo-block via %s
1893
be771a83
GS
1894(W exiting) You are exiting a rather special block construct (like a
1895sort block or subroutine) by unconventional means, such as a goto, or a
1896loop control statement. See L<perlfunc/sort>.
0a753a76 1897
a0d0e21e
LW
1898=item Exiting subroutine via %s
1899
be771a83
GS
1900(W exiting) You are exiting a subroutine by unconventional means, such
1901as a goto, or a loop control statement.
a0d0e21e
LW
1902
1903=item Exiting substitution via %s
1904
be771a83
GS
1905(W exiting) You are exiting a substitution by unconventional means, such
1906as a return, a goto, or a loop control statement.
a0d0e21e 1907
c608e803
KW
1908=item Expecting close bracket in regex; marked by <-- HERE in m/%s/
1909
1910(F)
1911You wrote something like
1912
1913 (?13
1914
1915to denote a capturing group of the form
1916L<C<(?I<PARNO>)>|perlre/(?PARNO) (?-PARNO) (?+PARNO) (?R) (?0)>,
1917but omitted the C<")">.
1918
e7d0b801
FC
1919=item Experimental "%s" subs not enabled
1920
1921(F) To use lexical subs, you must first enable them:
1922
f1d34ca8 1923 no warnings 'experimental::lexical_subs';
e7d0b801
FC
1924 use feature 'lexical_subs';
1925 my sub foo { ... }
1926
7b8d334a
GS
1927=item Explicit blessing to '' (assuming package main)
1928
be771a83
GS
1929(W misc) You are blessing a reference to a zero length string. This has
1930the effect of blessing the reference into the package main. This is
1931usually not what you want. Consider providing a default target package,
1932e.g. bless($ref, $p || 'MyPackage');
7b8d334a 1933
6df41af2
GS
1934=item %s: Expression syntax
1935
be771a83
GS
1936(A) You've accidentally run your script through B<csh> instead of Perl.
1937Check the #! line, or manually feed your script into Perl yourself.
6df41af2
GS
1938
1939=item %s failed--call queue aborted
1940
3c10abe3
AG
1941(F) An untrapped exception was raised while executing a UNITCHECK,
1942CHECK, INIT, or END subroutine. Processing of the remainder of the
1943queue of such routines has been prematurely ended.
6df41af2 1944
7253e4e3 1945=item False [] range "%s" in regex; marked by <-- HERE in m/%s/
73b437c8 1946
be771a83 1947(W regexp) A character class range must start and end at a literal
7253e4e3
RK
1948character, not another character class like C<\d> or C<[:alpha:]>. The "-"
1949in your false range is interpreted as a literal "-". Consider quoting the
9e3ec65c 1950"-", "\-". The <-- HERE shows whereabouts in the regular expression the
7253e4e3 1951problem was discovered. See L<perlre>.
73b437c8 1952
1b1ee2ef 1953=item Fatal VMS error (status=%d) at %s, line %d
a0d0e21e 1954
be771a83
GS
1955(P) An error peculiar to VMS. Something untoward happened in a VMS
1956system service or RTL routine; Perl's exit status should provide more
1957details. The filename in "at %s" and the line number in "line %d" tell
1958you which section of the Perl source code is distressed.
a0d0e21e
LW
1959
1960=item fcntl is not implemented
1961
1962(F) Your machine apparently doesn't implement fcntl(). What is this, a
1963PDP-11 or something?
1964
22846ab4
AB
1965=item FETCHSIZE returned a negative value
1966
1967(F) A tied array claimed to have a negative number of elements, which
1968is not possible.
1969
f337b084
TH
1970=item Field too wide in 'u' format in pack
1971
d8b5cc61 1972(W pack) Each line in an uuencoded string starts with a length indicator
6903afa2
FC
1973which can't encode values above 63. So there is no point in asking for
1974a line length bigger than that. Perl will behave as if you specified
5c96f6f7 1975C<u63> as the format.
f337b084 1976
af8c498a 1977=item Filehandle %s opened only for input
a0d0e21e 1978
6c8d78fb
HS
1979(W io) You tried to write on a read-only filehandle. If you intended
1980it to be a read-write filehandle, you needed to open it with "+<" or
1981"+>" or "+>>" instead of with "<" or nothing. If you intended only to
1982write the file, use ">" or ">>". See L<perlfunc/open>.
a0d0e21e 1983
af8c498a 1984=item Filehandle %s opened only for output
a0d0e21e 1985
6c8d78fb
HS
1986(W io) You tried to read from a filehandle opened only for writing, If
1987you intended it to be a read/write filehandle, you needed to open it
89a1bda8
FC
1988with "+<" or "+>" or "+>>" instead of with ">". If you intended only to
1989read from the file, use "<". See L<perlfunc/open>. Another possibility
1990is that you attempted to open filedescriptor 0 (also known as STDIN) for
1991output (maybe you closed STDIN earlier?).
97828cef
RGS
1992
1993=item Filehandle %s reopened as %s only for input
1994
1995(W io) You opened for reading a filehandle that got the same filehandle id
6903afa2 1996as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR
97828cef
RGS
1997previously.
1998
1999=item Filehandle STDIN reopened as %s only for output
2000
2001(W io) You opened for writing a filehandle that got the same filehandle id
fa816bf3 2002as STDIN. This occurred because you closed STDIN previously.
a0d0e21e
LW
2003
2004=item Final $ should be \$ or $name
2005
2006(F) You must now decide whether the final $ in a string was meant to be
be771a83
GS
2007a literal dollar sign, or was meant to introduce a variable name that
2008happens to be missing. So you have to put either the backslash or the
2009name.
a0d0e21e 2010
56e90b21
GS
2011=item flock() on closed filehandle %s
2012
be771a83 2013(W closed) The filehandle you're attempting to flock() got itself closed
c289d2f7 2014some time before now. Check your control flow. flock() operates on
be771a83
GS
2015filehandles. Are you attempting to call flock() on a dirhandle by the
2016same name?
56e90b21 2017
6df41af2
GS
2018=item Format not terminated
2019
2020(F) A format must be terminated by a line with a solitary dot. Perl got
2021to the end of your file without finding such a line.
2022
a0d0e21e
LW
2023=item Format %s redefined
2024
e476b1b5 2025(W redefine) You redefined a format. To suppress this warning, say
a0d0e21e
LW
2026
2027 {
271595cc 2028 no warnings 'redefine';
a0d0e21e
LW
2029 eval "format NAME =...";
2030 }
2031
a0d0e21e
LW
2032=item Found = in conditional, should be ==
2033
e476b1b5 2034(W syntax) You said
a0d0e21e
LW
2035
2036 if ($foo = 123)
2037
2038when you meant
2039
2040 if ($foo == 123)
2041
2042(or something like that).
2043
6df41af2
GS
2044=item %s found where operator expected
2045
56da5a46
RGS
2046(S syntax) The Perl lexer knows whether to expect a term or an operator.
2047If it sees what it knows to be a term when it was expecting to see an
be771a83
GS
2048operator, it gives you this warning. Usually it indicates that an
2049operator or delimiter was omitted, such as a semicolon.
6df41af2 2050
a0d0e21e
LW
2051=item gdbm store returned %d, errno %d, key "%s"
2052
2053(S) A warning from the GDBM_File extension that a store failed.
2054
2055=item gethostent not implemented
2056
2057(F) Your C library apparently doesn't implement gethostent(), probably
2058because if it did, it'd feel morally obligated to return every hostname
2059on the Internet.
2060
69282e91 2061=item get%sname() on closed socket %s
a0d0e21e 2062
be771a83
GS
2063(W closed) You tried to get a socket or peer socket name on a closed
2064socket. Did you forget to check the return value of your socket() call?
a0d0e21e 2065
748a9306
LW
2066=item getpwnam returned invalid UIC %#o for user "%s"
2067
2068(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
2069C<getpwnam> operator returned an invalid UIC.
2070
6df41af2
GS
2071=item getsockopt() on closed socket %s
2072
be771a83
GS
2073(W closed) You tried to get a socket option on a closed socket. Did you
2074forget to check the return value of your socket() call? See
6df41af2
GS
2075L<perlfunc/getsockopt>.
2076
2077=item Global symbol "%s" requires explicit package name
2078
a4edf47d 2079(F) You've said "use strict" or "use strict vars", which indicates
30c282f6 2080that all variables must either be lexically scoped (using "my" or "state"),
a4edf47d
GS
2081declared beforehand using "our", or explicitly qualified to say
2082which package the global variable is in (using "::").
6df41af2 2083
e476b1b5
GS
2084=item glob failed (%s)
2085
5ead438e 2086(S glob) Something went wrong with the external program(s) used
73c4e9dc
FC
2087for C<glob> and C<< <*.c> >>. Usually, this means that you supplied a C<glob>
2088pattern that caused the external program to fail and exit with a
be771a83 2089nonzero status. If the message indicates that the abnormal exit
73c4e9dc
FC
2090resulted in a coredump, this may also mean that your csh (C shell)
2091is broken. If so, you should change all of the csh-related variables
2092in config.sh: If you have tcsh, make the variables refer to it as
2093if it were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them
2094all empty (except that C<d_csh> should be C<'undef'>) so that Perl will
be771a83 2095think csh is missing. In either case, after editing config.sh, run
75b44862 2096C<./Configure -S> and rebuild Perl.
e476b1b5 2097
a0d0e21e
LW
2098=item Glob not terminated
2099
2100(F) The lexer saw a left angle bracket in a place where it was expecting
be771a83
GS
2101a term, so it's looking for the corresponding right angle bracket, and
2102not finding it. Chances are you left some needed parentheses out
2103earlier in the line, and you really meant a "less than".
a0d0e21e 2104
bcd05b94 2105=item gmtime(%f) too large
8b56d6ff 2106
e9200be3 2107(W overflow) You called C<gmtime> with a number that was larger than
fc003d4b 2108it can reliably handle and C<gmtime> probably returned the wrong
6903afa2 2109date. This warning is also triggered with NaN (the special
fc003d4b
MS
2110not-a-number value).
2111
bcd05b94 2112=item gmtime(%f) too small
fc003d4b 2113
e9200be3 2114(W overflow) You called C<gmtime> with a number that was smaller than
e7a1a147 2115it can reliably handle and C<gmtime> probably returned the wrong date.
8b56d6ff 2116
6df41af2 2117=item Got an error from DosAllocMem
a0d0e21e 2118
6df41af2
GS
2119(P) An error peculiar to OS/2. Most probably you're using an obsolete
2120version of Perl, and this should not happen anyway.
a0d0e21e
LW
2121
2122=item goto must have label
2123
2124(F) Unlike with "next" or "last", you're not allowed to goto an
2125unspecified destination. See L<perlfunc/goto>.
2126
6651ba0b
FC
2127=item Goto undefined subroutine%s
2128
2129(F) You tried to call a subroutine with C<goto &sub> syntax, but
2130the indicated subroutine hasn't been defined, or if it was, it
2131has since been undefined.
2132
49704364 2133=item ()-group starts with a count
18529408 2134
bca4a986
FC
2135(F) A ()-group started with a count. A count is supposed to follow
2136something: a template character or a ()-group. See L<perlfunc/pack>.
18529408 2137
6fbc9859
MH
2138=item Group name must start with a non-digit word character in regex; marked by
2139<-- HERE in m/%s/
1f4f6bf1
YO
2140
2141(F) Group names must follow the rules for perl identifiers, meaning
2142they must start with a non-digit word character. A common cause of
2143this error is using (?&0) instead of (?0). See L<perlre>.
2144
fe13d51d 2145=item %s had compilation errors.
6df41af2
GS
2146
2147(F) The final summary message when a C<perl -c> fails.
2148
a0d0e21e
LW
2149=item Had to create %s unexpectedly
2150
be771a83
GS
2151(S internal) A routine asked for a symbol from a symbol table that ought
2152to have existed already, but for some reason it didn't, and had to be
2153created on an emergency basis to prevent a core dump.
a0d0e21e
LW
2154
2155=item Hash %%s missing the % in argument %d of %s()
2156
be771a83
GS
2157(D deprecated) Really old Perl let you omit the % on hash names in some
2158spots. This is now heavily deprecated.
a0d0e21e 2159
6df41af2
GS
2160=item %s has too many errors
2161
2162(F) The parser has given up trying to parse the program after 10 errors.
2163Further error messages would likely be uninformative.
2164
252aa082
JH
2165=item Hexadecimal number > 0xffffffff non-portable
2166
e476b1b5 2167(W portable) The hexadecimal number you specified is larger than 2**32-1
9e24b6e2
JH
2168(4294967295) and therefore non-portable between systems. See
2169L<perlport> for more on portability concerns.
252aa082 2170
82f96200
JL
2171=item -i used with no filenames on the command line, reading from STDIN
2172
2173(S inplace) The C<-i> option was passed on the command line, indicating
2174that the script is intended to edit files inplace, but no files were
0421bbaa
FC
2175given. This is usually a mistake, since editing STDIN inplace doesn't
2176make sense, and can be confusing because it can make perl look like
2177it is hanging when it is really just trying to read from STDIN. You
2178should either pass a filename to edit, or remove C<-i> from the command
2179line. See L<perlrun> for more details.
82f96200 2180
8903cb82
PP
2181=item Identifier too long
2182
2183(F) Perl limits identifiers (names for variables, functions, etc.) to
fc36a67e 2184about 250 characters for simple names, and somewhat more for compound
be771a83
GS
2185names (like C<$A::B>). You've exceeded Perl's limits. Future versions
2186of Perl are likely to eliminate these arbitrary limitations.
8903cb82 2187
b33c0c71 2188=item Ignoring zero length \N{} in character class in regex; marked by <-- HERE in m/%s/
fc8cd66c 2189
b33c0c71 2190(W regexp) Named Unicode character escapes C<(\N{...})> may return a zero-length
6903afa2
FC
2191sequence. When such an escape is used in a character class its
2192behaviour is not well defined. Check that the correct escape has
fc8cd66c
YO
2193been used, and the correct charname handler is in scope.
2194
6df41af2 2195=item Illegal binary digit %s
f675dbe5 2196
6df41af2 2197(F) You used a digit other than 0 or 1 in a binary number.
f675dbe5 2198
6df41af2 2199=item Illegal binary digit %s ignored
a0d0e21e 2200
be771a83
GS
2201(W digit) You may have tried to use a digit other than 0 or 1 in a
2202binary number. Interpretation of the binary number stopped before the
2203offending digit.
a0d0e21e 2204
6597eb22
FC
2205=item Illegal character after '_' in prototype for %s : %s
2206
2207(W illegalproto) An illegal character was found in a prototype declaration.
2208Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
2209
78d0fecf 2210=item Illegal character \%o (carriage return)
4fdae800 2211
d5898338 2212(F) Perl normally treats carriage returns in the program text as it
be771a83
GS
2213would any other whitespace, which means you should never see this error
2214when Perl was built using standard options. For some reason, your
2215version of Perl appears to have been built without this support. Talk
2216to your Perl administrator.
4fdae800 2217
d37a9538
ST
2218=item Illegal character in prototype for %s : %s
2219
197afce1 2220(W illegalproto) An illegal character was found in a prototype declaration.
2e9cc7ef 2221Legal characters in prototypes are $, @, %, *, ;, [, ], &, \, and +.
d37a9538 2222
904d85c5
RGS
2223=item Illegal declaration of anonymous subroutine
2224
2225(F) When using the C<sub> keyword to construct an anonymous subroutine,
6903afa2 2226you must always specify a block of code. See L<perlsub>.
904d85c5 2227
8e742a20
MHM
2228=item Illegal declaration of subroutine %s
2229
6903afa2 2230(F) A subroutine was not declared correctly. See L<perlsub>.
8e742a20 2231
a0d0e21e
LW
2232=item Illegal division by zero
2233
be771a83
GS
2234(F) You tried to divide a number by 0. Either something was wrong in
2235your logic, or you need to put a conditional in to guard against
2236meaningless input.
a0d0e21e 2237
6df41af2
GS
2238=item Illegal hexadecimal digit %s ignored
2239
be771a83
GS
2240(W digit) You may have tried to use a character other than 0 - 9 or
2241A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal
2242number stopped before the illegal character.
6df41af2 2243
a0d0e21e
LW
2244=item Illegal modulus zero
2245
be771a83
GS
2246(F) You tried to divide a number by 0 to get the remainder. Most
2247numbers don't take to this kindly.
a0d0e21e 2248
6df41af2 2249=item Illegal number of bits in vec
399388f4 2250
6df41af2
GS
2251(F) The number of bits in vec() (the third argument) must be a power of
2252two from 1 to 32 (or 64, if your platform supports that).
399388f4
GS
2253
2254=item Illegal octal digit %s
a0d0e21e 2255
d1be9408 2256(F) You used an 8 or 9 in an octal number.
a0d0e21e 2257
399388f4 2258=item Illegal octal digit %s ignored
748a9306 2259
d1be9408 2260(W digit) You may have tried to use an 8 or 9 in an octal number.
75b44862 2261Interpretation of the octal number stopped before the 8 or 9.
748a9306 2262
c608e803
KW
2263=item Illegal pattern in regex; marked by <-- HERE in m/%s/
2264
2265(F)
2266You wrote something like
2267
2268 (?+foo)
2269
2270The C<"+"> is valid only when followed by digits, indicating a
2271capturing group. See
2272L<C<(?I<PARNO>)>|perlre/(?PARNO) (?-PARNO) (?+PARNO) (?R) (?0)>.
2273
fe13d51d 2274=item Illegal switch in PERL5OPT: -%c
6ff81951 2275
6df41af2 2276(X) The PERL5OPT environment variable may only be used to set the
646ca9b2 2277following switches: B<-[CDIMUdmtw]>.
6ff81951 2278
6df41af2 2279=item Ill-formed CRTL environ value "%s"
81e118e0 2280
75b44862 2281(W internal) A warning peculiar to VMS. Perl tried to read the CRTL's
be771a83
GS
2282internal environ array, and encountered an element without the C<=>
2283delimiter used to separate keys from values. The element is ignored.
09bef843 2284
6df41af2 2285=item Ill-formed message in prime_env_iter: |%s|
54310121 2286
be771a83
GS
2287(W internal) A warning peculiar to VMS. Perl tried to read a logical
2288name or CLI symbol definition when preparing to iterate over %ENV, and
2289didn't see the expected delimiter between key and value, so the line was
2290ignored.
54310121 2291
6df41af2 2292=item (in cleanup) %s
9607fc9c 2293
be771a83
GS
2294(W misc) This prefix usually indicates that a DESTROY() method raised
2295the indicated exception. Since destructors are usually called by the
2296system at arbitrary points during execution, and often a vast number of
2297times, the warning is issued only once for any number of failures that
2298would otherwise result in the same message being repeated.
6df41af2 2299
be771a83
GS
2300Failure of user callbacks dispatched using the C<G_KEEPERR> flag could
2301also result in this warning. See L<perlcall/G_KEEPERR>.
9607fc9c 2302
0d0b4b3b
KW
2303=item Incomplete expression within '(?[ ])' in regex; marked by <-- HERE in m/%s/
2304
2305(F)
2306There was a syntax error within the C<(?[ ])>. This can happen if the
2307expression inside the construct was completely empty, or if there are
2308too many or few operands for the number of operators. Perl is not smart
2309enough to give you a more precise indication as to what is wrong.
2310
6fbc9859
MH
2311=item Inconsistent hierarchy during C3 merge of class '%s': merging failed on
2312parent '%s'
2c7d6b9c
RGS
2313
2314(F) The method resolution order (MRO) of the given class is not
2315C3-consistent, and you have enabled the C3 MRO for this class. See the C3
2316documentation in L<mro> for more information.
2317
979699d9
JH
2318=item In EBCDIC the v-string components cannot exceed 2147483647
2319
2320(F) An error peculiar to EBCDIC. Internally, v-strings are stored as
2321Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC
2322encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF).
2323
1a147d38
YO
2324=item Infinite recursion in regex; marked by <-- HERE in m/%s/
2325
2326(F) You used a pattern that references itself without consuming any input
6903afa2 2327text. You should check the pattern to ensure that recursive patterns
1a147d38
YO
2328either consume text or fail.
2329
9e3ec65c 2330The <-- HERE shows whereabouts in the regular expression the problem was
1a147d38
YO
2331discovered.
2332
6dbe9451
NC
2333=item Initialization of state variables in list context currently forbidden
2334
6903afa2
FC
2335(F) Currently the implementation of "state" only permits the
2336initialization of scalar variables in scalar context. Re-write
2337C<state ($a) = 42> as C<state $a = 42> to change from list to scalar
2338context. Constructions such as C<state (@a) = foo()> will be
2339supported in a future perl release.
6dbe9451 2340
a0d0e21e
LW
2341=item Insecure dependency in %s
2342
8b1a09fc 2343(F) You tried to do something that the tainting mechanism didn't like.
be771a83
GS
2344The tainting mechanism is turned on when you're running setuid or
2345setgid, or when you specify B<-T> to turn it on explicitly. The
2346tainting mechanism labels all data that's derived directly or indirectly
2347from the user, who is considered to be unworthy of your trust. If any
2348such data is used in a "dangerous" operation, you get this error. See
2349L<perlsec> for more information.
a0d0e21e
LW
2350
2351=item Insecure directory in %s
2352
be771a83
GS
2353(F) You can't use system(), exec(), or a piped open in a setuid or
2354setgid script if C<$ENV{PATH}> contains a directory that is writable by
df98f984
RGS
2355the world. Also, the PATH must not contain any relative directory.
2356See L<perlsec>.
a0d0e21e 2357
62f468fc 2358=item Insecure $ENV{%s} while running %s
a0d0e21e
LW
2359
2360(F) You can't use system(), exec(), or a piped open in a setuid or
62f468fc 2361setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
332d5f78
SR
2362C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data
2363supplied (or potentially supplied) by the user. The script must set
2364the path to a known value, using trustworthy data. See L<perlsec>.
a0d0e21e 2365
0e9be77f
DM
2366=item Insecure user-defined property %s
2367
2368(F) Perl detected tainted data when trying to compile a regular
2369expression that contains a call to a user-defined character property
2370function, i.e. C<\p{IsFoo}> or C<\p{InFoo}>.
2371See L<perlunicode/User-Defined Character Properties> and L<perlsec>.
2372
b9ef414d
FC
2373=item Integer overflow in format string for %s
2374
2375(F) The indexes and widths specified in the format string of C<printf()>
2376or C<sprintf()> are too large. The numbers must not overflow the size of
2377integers for your architecture.
2378
a7ae9550
GS
2379=item Integer overflow in %s number
2380
35928bc5 2381(S overflow) The hexadecimal, octal or binary number you have specified
be771a83
GS
2382either as a literal or as an argument to hex() or oct() is too big for
2383your architecture, and has been converted to a floating point number.
2384On a 32-bit architecture the largest hexadecimal, octal or binary number
9e24b6e2
JH
2385representable without overflow is 0xFFFFFFFF, 037777777777, or
23860b11111111111111111111111111111111 respectively. Note that Perl
2387transparently promotes all numbers to a floating point representation
2388internally--subject to loss of precision errors in subsequent
2389operations.
bbce6d69 2390
fc89ca81
FC
2391=item Integer overflow in srand
2392
2393(S overflow) The number you have passed to srand is too big to fit
2394in your architecture's integer representation. The number has been
2395replaced with the largest integer supported (0xFFFFFFFF on 32-bit
2396architectures). This means you may be getting less randomness than
2397you expect, because different random seeds above the maximum will
2398return the same sequence of random numbers.
2399
46314c13
JP
2400=item Integer overflow in version
2401
18da5252
FC
2402=item Integer overflow in version %d
2403
784d71ed
FC
2404(W overflow) Some portion of a version initialization is too large for
2405the size of integers for your architecture. This is not a warning
f084e84f 2406because there is no rational reason for a version to try and use an
784d71ed
FC
2407element larger than typically 2**32. This is usually caused by trying
2408to use some odd mathematical operation as a version, like 100/9.
46314c13 2409
7253e4e3 2410=item Internal disaster in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2411
2412(P) Something went badly wrong in the regular expression parser.
9e3ec65c 2413The <-- HERE shows whereabouts in the regular expression the problem was
b45f050a
JF
2414discovered.
2415
748a9306
LW
2416=item Internal inconsistency in tracking vforks
2417
be771a83
GS
2418(S) A warning peculiar to VMS. Perl keeps track of the number of times
2419you've called C<fork> and C<exec>, to determine whether the current call
2420to C<exec> should affect the current script or a subprocess (see
2421L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so
2422Perl is making a guess and treating this C<exec> as a request to
2423terminate the Perl script and execute the specified command.
748a9306 2424
7253e4e3 2425=item Internal urp in regex; marked by <-- HERE in m/%s/
b45f050a 2426
fa816bf3 2427(P) Something went badly awry in the regular expression parser. The
9e3ec65c 2428<-- HERE shows whereabouts in the regular expression the problem was
7253e4e3 2429discovered.
a0d0e21e 2430
6df41af2
GS
2431=item %s (...) interpreted as function
2432
75b44862 2433(W syntax) You've run afoul of the rule that says that any list operator
be771a83 2434followed by parentheses turns into a function, with all the list
64977eb6 2435operators arguments found inside the parentheses. See
13a2d996 2436L<perlop/Terms and List Operators (Leftward)>.
6df41af2 2437
09bef843
SB
2438=item Invalid %s attribute: %s
2439
a4a4c9e2 2440(F) The indicated attribute for a subroutine or variable was not recognized
09bef843
SB
2441by Perl or by a user-supplied handler. See L<attributes>.
2442
2443=item Invalid %s attributes: %s
2444
a4a4c9e2 2445(F) The indicated attributes for a subroutine or variable were not
be771a83 2446recognized by Perl or by a user-supplied handler. See L<attributes>.
09bef843 2447
c608e803
KW
2448=item Invalid [] range "%*.*s" in regex; marked by <-- HERE in m/%s/
2449
2450(F)
2451You wrote something like
2452
2453 [z-a]
2454
2455in a regular expression pattern. Ranges must be specified with the
2456lowest code point first. Instead write
2457
2458 [a-z]
2459
4d7cd482
KW
2460=item Invalid character in \N{...}; marked by <-- HERE in \N{%s}
2461
2462(F) Only certain characters are valid for character names. The
2463indicated one isn't. See L<charnames/CUSTOM ALIASES>.
2464
225fb84f
KW
2465=item Invalid character in charnames alias definition; marked by <-- HERE in '%s
2466
2467(F) You tried to create a custom alias for a character name, with
2468the C<:alias> option to C<use charnames> and the specified character in
2469the indicated name isn't valid. See L<charnames/CUSTOM ALIASES>.
2470
c635e13b
PP
2471=item Invalid conversion in %s: "%s"
2472
be771a83
GS
2473(W printf) Perl does not understand the given format conversion. See
2474L<perlfunc/sprintf>.
c635e13b 2475
6fbc9859
MH
2476=item Invalid escape in the specified encoding in regex; marked by <-- HERE in
2477m/%s/
9e08bc66
ST
2478
2479(W regexp) The numeric escape (for example C<\xHH>) of value < 256
2480didn't correspond to a single character through the conversion
2481from the encoding specified by the encoding pragma.
2482The escape was replaced with REPLACEMENT CHARACTER (U+FFFD) instead.
9e3ec65c 2483The <-- HERE shows whereabouts in the regular expression the
9e08bc66
ST
2484escape was discovered.
2485
8149aa9f
FC
2486=item Invalid hexadecimal number in \N{U+...}
2487
6fbc9859
MH
2488=item Invalid hexadecimal number in \N{U+...} in regex; marked by <-- HERE in
2489m/%s/
aec0ef10 2490
8149aa9f 2491(F) The character constant represented by C<...> is not a valid hexadecimal
74f8e9e3
FC
2492number. Either it is empty, or you tried to use a character other than
24930 - 9 or A - F, a - f in a hexadecimal number.
8149aa9f 2494
6651ba0b
FC
2495=item Invalid module name %s with -%c option: contains single ':'
2496
2497(F) The module argument to perl's B<-m> and B<-M> command-line options
2498cannot contain single colons in the module name, but only in the
2499arguments after "=". In other words, B<-MFoo::Bar=:baz> is ok, but
2500B<-MFoo:Bar=baz> is not.
2501
2c7d6b9c
RGS
2502=item Invalid mro name: '%s'
2503
162a3e34
FC
2504(F) You tried to C<mro::set_mro("classname", "foo")> or C<use mro 'foo'>,
2505where C<foo> is not a valid method resolution order (MRO). Currently,
2506the only valid ones supported are C<dfs> and C<c3>, unless you have loaded
2507a module that is a MRO plugin. See L<mro> and L<perlmroapi>.
2c7d6b9c 2508
40e4140b
FC
2509=item Invalid negative number (%s) in chr
2510
2511(W utf8) You passed a negative number to C<chr>. Negative numbers are
2512not valid characters numbers, so it return the Unicode replacement
2513character (U+FFFD).
2514
6651ba0b
FC
2515=item invalid option -D%c, use -D'' to see choices
2516
8ff21bfe
FC
2517(S debugging) Perl was called with invalid debugger flags. Call perl
2518with the B<-D> option with no flags to see the list of acceptable values.
982c4ecb 2519See also L<perlrun/-Dletters>.
6651ba0b 2520
7253e4e3 2521=item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2522
2523(F) The range specified in a character class had a minimum character
7253e4e3
RK
2524greater than the maximum character. One possibility is that you forgot the
2525C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only
9e3ec65c 2526up to C<ff>. The <-- HERE shows whereabouts in the regular expression the
7253e4e3 2527problem was discovered. See L<perlre>.
6df41af2 2528
d1573ac7 2529=item Invalid range "%s" in transliteration operator
c2e66d9e
GS
2530
2531(F) The range specified in the tr/// or y/// operator had a minimum
2532character greater than the maximum character. See L<perlop>.
2533
09bef843
SB
2534=item Invalid separator character %s in attribute list
2535
0120eecf 2536(F) Something other than a colon or whitespace was seen between the
be771a83
GS
2537elements of an attribute list. If the previous attribute had a
2538parenthesised parameter list, perhaps that list was terminated too soon.
2539See L<attributes>.
09bef843 2540
b4581f09
JH
2541=item Invalid separator character %s in PerlIO layer specification %s
2542
2bfc5f71
FC
2543(W layer) When pushing layers onto the Perl I/O system, something other
2544than a colon or whitespace was seen between the elements of a layer list.
b4581f09
JH
2545If the previous attribute had a parenthesised parameter list, perhaps that
2546list was terminated too soon.
2547
2c86d456
DG
2548=item Invalid strict version format (%s)
2549
fa816bf3 2550(F) A version number did not meet the "strict" criteria for versions.
2c86d456
DG
2551A "strict" version number is a positive decimal number (integer or
2552decimal-fraction) without exponentiation or else a dotted-decimal
2553v-string with a leading 'v' character and at least three components.
a6485a24 2554The parenthesized text indicates which criteria were not met.
2c86d456
DG
2555See the L<version> module for more details on allowed version formats.
2556
49704364 2557=item Invalid type '%s' in %s
96e4d5b1 2558
49704364
LW
2559(F) The given character is not a valid pack or unpack type.
2560See L<perlfunc/pack>.
6728c851 2561
49704364 2562(W) The given character is not a valid pack or unpack type but used to be
75b44862 2563silently ignored.
96e4d5b1 2564
2c86d456
DG
2565=item Invalid version format (%s)
2566
fa816bf3 2567(F) A version number did not meet the "lax" criteria for versions.
2c86d456
DG
2568A "lax" version number is a positive decimal number (integer or
2569decimal-fraction) without exponentiation or else a dotted-decimal
fa816bf3
FC
2570v-string. If the v-string has fewer than three components, it
2571must have a leading 'v' character. Otherwise, the leading 'v' is
2572optional. Both decimal and dotted-decimal versions may have a
2573trailing "alpha" component separated by an underscore character
2574after a fractional or dotted-decimal component. The parenthesized
2575text indicates which criteria were not met. See the L<version> module
2576for more details on allowed version formats.
46314c13 2577
798ae1b7
DG
2578=item Invalid version object
2579
fa816bf3
FC
2580(F) The internal structure of the version object was invalid.
2581Perhaps the internals were modified directly in some way or
2582an arbitrary reference was blessed into the "version" class.
798ae1b7 2583
a0d0e21e
LW
2584=item ioctl is not implemented
2585
2586(F) Your machine apparently doesn't implement ioctl(), which is pretty
2587strange for a machine that supports C.
2588
c289d2f7
JH
2589=item ioctl() on unopened %s
2590
2591(W unopened) You tried ioctl() on a filehandle that was never opened.
34b6fd5e 2592Check your control flow and number of arguments.
c289d2f7 2593
fe13d51d 2594=item IO layers (like '%s') unavailable
363c40c4
SB
2595
2596(F) Your Perl has not been configured to have PerlIO, and therefore
34b6fd5e 2597you cannot use IO layers. To have PerlIO, Perl must be configured
363c40c4
SB
2598with 'useperlio'.
2599
80cbd5ad
JH
2600=item IO::Socket::atmark not implemented on this architecture
2601
2602(F) Your machine doesn't implement the sockatmark() functionality,
34b6fd5e 2603neither as a system call nor an ioctl call (SIOCATMARK).
80cbd5ad 2604
53213d38 2605=item $* is no longer supported, and will become a syntax error
b4581f09 2606
53213d38
NC
2607(D deprecated, syntax) The special variable C<$*>, which has had no
2608effect since v5.10.0, will be removed soon. Currently code which mentions
2609this variable compiles with this warning, but the variable is no longer
2610magical, hence reads and writes have no side effects. In future such code
2611will fail to compile with a syntax error.
2612
2613Prior to v5.10.0 the use of C<$*> enabled or disabled multi-line matching
2614within a string.
4fd19576
B
2615
2616Instead of using C<$*> you should use the C</m> (and maybe C</s>) regexp
6903afa2
FC
2617modifiers. You can enable C</m> for a lexical scope (even a whole file)
2618with C<use re '/m'>. (In older versions: when C<$*> was set to a true value
570dedd4 2619then all regular expressions behaved as if they were written using C</m>.)
b4581f09 2620
8ae1fe26
RGS
2621=item $# is no longer supported
2622
a58ac25e 2623(D deprecated, syntax) The special variable C<$#>, deprecated in older
6903afa2 2624perls, has been removed as of 5.9.3 and is no longer supported. You
a58ac25e 2625should use the printf/sprintf functions instead.
8ae1fe26 2626
ccf3535a 2627=item '%s' is not a code reference
6ad11d81 2628
6903afa2
FC
2629(W overload) The second (fourth, sixth, ...) argument of
2630overload::constant needs to be a code reference. Either
2631an anonymous subroutine, or a reference to a subroutine.
6ad11d81 2632
ccf3535a 2633=item '%s' is not an overloadable type
6ad11d81 2634
04a80ee0
RGS
2635(W overload) You tried to overload a constant type the overload package is
2636unaware of.
6ad11d81 2637
aec0ef10 2638=item Junk on end of regexp in regex m/%s/
a0d0e21e
LW
2639
2640(P) The regular expression parser is confused.
2641
2642=item Label not found for "last %s"
2643
be771a83
GS
2644(F) You named a loop to break out of, but you're not currently in a loop
2645of that name, not even if you count where you were called from. See
2646L<perlfunc/last>.
a0d0e21e
LW
2647
2648=item Label not found for "next %s"
2649
2650(F) You named a loop to continue, but you're not currently in a loop of
2651that name, not even if you count where you were called from. See
2652L<perlfunc/last>.
2653
2654=item Label not found for "redo %s"
2655
2656(F) You named a loop to restart, but you're not currently in a loop of
2657that name, not even if you count where you were called from. See
2658L<perlfunc/last>.
2659
85ab1d1d 2660=item leaving effective %s failed
5ff3f7a4 2661
85ab1d1d 2662(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
2663effective uids or gids failed.
2664
49704364
LW
2665=item length/code after end of string in unpack
2666
d7f8936a 2667(F) While unpacking, the string buffer was already used up when an unpack
6903afa2
FC
2668length/code combination tried to obtain more data. This results in
2669an undefined value for the length. See L<perlfunc/pack>.
49704364 2670
e508c8a4
MH
2671=item length() used on %s
2672
0d46a4e7
FC
2673(W syntax) You used length() on either an array or a hash when you
2674probably wanted a count of the items.
e508c8a4
MH
2675
2676Array size can be obtained by doing:
2677
2678 scalar(@array);
2679
2680The number of items in a hash can be obtained by doing:
2681
2682 scalar(keys %hash);
2683
f0e67a1d
Z
2684=item Lexing code attempted to stuff non-Latin-1 character into Latin-1 input
2685
2686(F) An extension is attempting to insert text into the current parse
6903afa2
FC
2687(using L<lex_stuff_pvn|perlapi/lex_stuff_pvn> or similar), but tried to insert a character that
2688couldn't be part of the current input. This is an inherent pitfall
2689of the stuffing mechanism, and one of the reasons to avoid it. Where
2690it is necessary to stuff, stuffing only plain ASCII is recommended.
f0e67a1d
Z
2691
2692=item Lexing code internal error (%s)
2693
2694(F) Lexing code supplied by an extension violated the lexer's API in a
2695detectable way.
2696
69282e91 2697=item listen() on closed socket %s
a0d0e21e 2698
be771a83
GS
2699(W closed) You tried to do a listen on a closed socket. Did you forget
2700to check the return value of your socket() call? See
2701L<perlfunc/listen>.
a0d0e21e 2702
6651ba0b
FC
2703=item List form of piped open not implemented
2704
2705(F) On some platforms, notably Windows, the three-or-more-arguments
2706form of C<open> does not support pipes, such as C<open($pipe, '|-', @args)>.
2707Use the two-argument C<open($pipe, '|prog arg1 arg2...')> form instead.
2708
bcd05b94 2709=item localtime(%f) too large
8b56d6ff 2710
e9200be3 2711(W overflow) You called C<localtime> with a number that was larger
fc003d4b 2712than it can reliably handle and C<localtime> probably returned the
6903afa2 2713wrong date. This warning is also triggered with NaN (the special
fc003d4b
MS
2714not-a-number value).
2715
bcd05b94 2716=item localtime(%f) too small
fc003d4b 2717
e9200be3 2718(W overflow) You called C<localtime> with a number that was smaller
fc003d4b 2719than it can reliably handle and C<localtime> probably returned the
e7a1a147 2720wrong date.
8b56d6ff 2721
58e23c8d 2722=item Lookbehind longer than %d not implemented in regex m/%s/
b45f050a
JF
2723
2724(F) There is currently a limit on the length of string which lookbehind can
6903afa2 2725handle. This restriction may be eased in a future release.
2e50fd82 2726
b88df990
NC
2727=item Lost precision when %s %f by 1
2728
e63e8a91
FC
2729(W imprecision) The value you attempted to increment or decrement by one
2730is too large for the underlying floating point representation to store
2731accurately, hence the target of C<++> or C<--> is unchanged. Perl issues this
2732warning because it has already switched from integers to floating point
2733when values are too large for integers, and now even floating point is
2734insufficient. You may wish to switch to using L<Math::BigInt> explicitly.
b88df990 2735
93fad930 2736=item lstat() on filehandle%s
2f7da168
RK
2737
2738(W io) You tried to do an lstat on a filehandle. What did you mean
2739by that? lstat() makes sense only on filenames. (Perl did a fstat()
2740instead on the filehandle.)
2741
345d70e3 2742=item lvalue attribute %s already-defined subroutine
bb3abb05 2743
345d70e3
FC
2744(W misc) Although L<attributes.pm|attributes> allows this, turning the lvalue
2745attribute on or off on a Perl subroutine that is already defined
2746does not always work properly. It may or may not do what you
2747want, depending on what code is inside the subroutine, with exact
2748details subject to change between Perl versions. Only do this
2749if you really know what you are doing.
bb3abb05 2750
885ef6f5
GG
2751=item lvalue attribute ignored after the subroutine has been defined
2752
345d70e3
FC
2753(W misc) Using the C<:lvalue> declarative syntax to make a Perl
2754subroutine an lvalue subroutine after it has been defined is
2755not permitted. To make the subroutine an lvalue subroutine,
2756add the lvalue attribute to the definition, or put the C<sub
2757foo :lvalue;> declaration before the definition.
2758
2759See also L<attributes.pm|attributes>.
885ef6f5 2760
2db62bbc 2761=item Malformed integer in [] in pack
49704364 2762
2db62bbc 2763(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2764are permitted. See L<perlfunc/pack>.
2765
2766=item Malformed integer in [] in unpack
2767
2db62bbc 2768(F) Between the brackets enclosing a numeric repeat count only digits
49704364
LW
2769are permitted. See L<perlfunc/pack>.
2770
6df41af2
GS
2771=item Malformed PERLLIB_PREFIX
2772
2773(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
2774
2775 prefix1;prefix2
2776
2777or
6df41af2
GS
2778 prefix1 prefix2
2779
be771a83
GS
2780with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of
2781a builtin library search path, prefix2 is substituted. The error may
2782appear if components are not found, or are too long. See
fecfaeb8 2783"PERLLIB_PREFIX" in L<perlos2>.
6df41af2 2784
2f758a16
ST
2785=item Malformed prototype for %s: %s
2786
d37a9538
ST
2787(F) You tried to use a function with a malformed prototype. The
2788syntax of function prototypes is given a brief compile-time check for
2789obvious errors like invalid characters. A more rigorous check is run
2790when the function is called.
2f758a16 2791
ba210ebe
JH
2792=item Malformed UTF-8 character (%s)
2793
4d6f11e5 2794(S utf8)(F) Perl detected a string that didn't comply with UTF-8
2575c402 2795encoding rules, even though it had the UTF8 flag on.
ba210ebe 2796
2575c402
JW
2797One possible cause is that you set the UTF8 flag yourself for data that
2798you thought to be in UTF-8 but it wasn't (it was for example legacy
6903afa2 27998-bit data). To guard against this, you can use Encode::decode_utf8.
2575c402
JW
2800
2801If you use the C<:encoding(UTF-8)> PerlIO layer for input, invalid byte
2802sequences are handled gracefully, but if you use C<:utf8>, the flag is
2803set without validating the data, possibly resulting in this error
2804message.
2805
2806See also L<Encode/"Handling Malformed Data">.
901b21bf 2807
107160e2
KW
2808=item Malformed UTF-8 character immediately after '%s'
2809
2810(F) You said C<use utf8>, but the program file doesn't comply with UTF-8
2811encoding rules. The message prints out the properly encoded characters
2812just before the first bad one. If C<utf8> warnings are enabled, a
2813warning is generated that gives more details about the type of
2814malformation.
2815
bde9e88d 2816=item Malformed UTF-8 returned by \N{%s} immediately after '%s'
ff3f963a
KW
2817
2818(F) The charnames handler returned malformed UTF-8.
2819
4a5d3a93
FC
2820=item Malformed UTF-8 string in '%c' format in unpack
2821
2822(F) You tried to unpack something that didn't comply with UTF-8 encoding
2823rules and perl was unable to guess how to make more progress.
2824
f337b084
TH
2825=item Malformed UTF-8 string in pack
2826
2827(F) You tried to pack something that didn't comply with UTF-8 encoding
2828rules and perl was unable to guess how to make more progress.
2829
2830=item Malformed UTF-8 string in unpack
2831
2832(F) You tried to unpack something that didn't comply with UTF-8 encoding
2833rules and perl was unable to guess how to make more progress.
2834
4a5d3a93 2835=item Malformed UTF-16 surrogate
f337b084 2836
4a5d3a93
FC
2837(F) Perl thought it was reading UTF-16 encoded character data but while
2838doing it Perl met a malformed Unicode surrogate.
2839
2840=item %s matches null string many times in regex; marked by <-- HERE in m/%s/
2841
2842(W regexp) The pattern you've specified would be an infinite loop if the
2843regular expression engine didn't specifically check for that. The <-- HERE
9e3ec65c 2844shows whereabouts in the regular expression the problem was discovered.
4a5d3a93 2845See L<perlre>.
f337b084 2846
de42a5a9 2847=item Maximal count of pending signals (%u) exceeded
2563cec5 2848
6903afa2 2849(F) Perl aborted due to too high a number of signals pending. This
2563cec5
IZ
2850usually indicates that your operating system tried to deliver signals
2851too fast (with a very high priority), starving the perl process from
2852resources it would need to reach a point where it can process signals
6903afa2 2853safely. (See L<perlipc/"Deferred Signals (Safe Signals)">.)
2563cec5 2854
25f58aea
PN
2855=item "%s" may clash with future reserved word
2856
2857(W) This warning may be due to running a perl5 script through a perl4
2858interpreter, especially if the word that is being warned about is
2859"use" or "my".
2860
0d2487cd 2861=item '%' may not be used in pack
6df41af2
GS
2862
2863(F) You can't pack a string by supplying a checksum, because the
be771a83
GS
2864checksumming process loses information, and you can't go the other way.
2865See L<perlfunc/unpack>.
6df41af2 2866
a0d0e21e
LW
2867=item Method for operation %s not found in package %s during blessing
2868
2869(F) An attempt was made to specify an entry in an overloading table that
e7ea3e70 2870doesn't resolve to a valid subroutine. See L<overload>.
a0d0e21e 2871
3cdd684c
TP
2872=item Method %s not permitted
2873
2874See Server error.
2875
a0d0e21e
LW
2876=item Might be a runaway multi-line %s string starting on line %d
2877
2878(S) An advisory indicating that the previous error may have been caused
2879by a missing delimiter on a string or pattern, because it eventually
2880ended earlier on the current line.
2881
2882=item Misplaced _ in number
2883
d4ced10d
JH
2884(W syntax) An underscore (underbar) in a numeric constant did not
2885separate two digits.
a0d0e21e 2886
7baa4690
HS
2887=item Missing argument in %s
2888
2889(W uninitialized) A printf-type format required more arguments than were
2890supplied.
2891
9e81e6a1
RGS
2892=item Missing argument to -%c
2893
2894(F) The argument to the indicated command line switch must follow
2895immediately after the switch, without intervening spaces.
2896
ff3f963a 2897=item Missing braces on \N{}
423cee85 2898
aec0ef10
FC
2899=item Missing braces on \N{} in regex; marked by <-- HERE in m/%s/
2900
4a2d328f 2901(F) Wrong syntax of character name literal C<\N{charname}> within
532cb70d
FC
2902double-quotish context. This can also happen when there is a space
2903(or comment) between the C<\N> and the C<{> in a regex with the C</x> modifier.
2904This modifier does not change the requirement that the brace immediately
2905follow the C<\N>.
423cee85 2906
f0a2b745
KW
2907=item Missing braces on \o{}
2908
2909(F) A C<\o> must be followed immediately by a C<{> in double-quotish context.
2910
a0d0e21e
LW
2911=item Missing comma after first argument to %s function
2912
2913(F) While certain functions allow you to specify a filehandle or an
2914"indirect object" before the argument list, this ain't one of them.
2915
06eaf0bc
GS
2916=item Missing command in piped open
2917
be771a83
GS
2918(W pipe) You used the C<open(FH, "| command")> or
2919C<open(FH, "command |")> construction, but the command was missing or
2920blank.
06eaf0bc 2921
961ce445
RGS
2922=item Missing control char name in \c
2923
2924(F) A double-quoted string ended with "\c", without the required control
2925character name.
2926
8767b1ab 2927=item Missing name in "%s sub"
6df41af2 2928
be771a83
GS
2929(F) The reserved syntax for lexically scoped subroutines requires that
2930they have a name with which they can be found.
6df41af2
GS
2931
2932=item Missing $ on loop variable
2933
be771a83
GS
2934(F) Apparently you've been programming in B<csh> too much. Variables
2935are always mentioned with the $ in Perl, unlike in the shells, where it
2936can vary from one line to the next.
6df41af2 2937
cc507455 2938=item (Missing operator before %s?)
748a9306 2939
56da5a46
RGS
2940(S syntax) This is an educated guess made in conjunction with the message
2941"%s found where operator expected". Often the missing operator is a comma.
748a9306 2942
aec0ef10 2943=item Missing right brace on \%c{} in regex; marked by <-- HERE in m/%s/
ab13f0c7 2944
ff3f963a
KW
2945(F) Missing right brace in C<\x{...}>, C<\p{...}>, C<\P{...}>, or C<\N{...}>.
2946
4a68bf9d 2947=item Missing right brace on \N{} or unescaped left brace after \N
ff3f963a 2948
d32207c9
FC
2949(F) C<\N> has two meanings.
2950
2951The traditional one has it followed by a name enclosed in braces,
2952meaning the character (or sequence of characters) given by that
fa816bf3 2953name. Thus C<\N{ASTERISK}> is another way of writing C<*>, valid in both
d32207c9
FC
2954double-quoted strings and regular expression patterns. In patterns,
2955it doesn't have the meaning an unescaped C<*> does.
2956
2957Starting in Perl 5.12.0, C<\N> also can have an additional meaning (only)
2958in patterns, namely to match a non-newline character. (This is short
2959for C<[^\n]>, and like C<.> but is not affected by the C</s> regex modifier.)
2960
2961This can lead to some ambiguities. When C<\N> is not followed immediately
2962by a left brace, Perl assumes the C<[^\n]> meaning. Also, if the braces
2963form a valid quantifier such as C<\N{3}> or C<\N{5,}>, Perl assumes that this
2964means to match the given quantity of non-newlines (in these examples,
29653; and 5 or more, respectively). In all other case, where there is a
2966C<\N{> and a matching C<}>, Perl assumes that a character name is desired.
2967
2968However, if there is no matching C<}>, Perl doesn't know if it was
2969mistakenly omitted, or if C<[^\n]{> was desired, and raises this error.
2970If you meant the former, add the right brace; if you meant the latter,
2971escape the brace with a backslash, like so: C<\N\{>
ab13f0c7 2972
d98d5fff 2973=item Missing right curly or square bracket
a0d0e21e 2974
be771a83
GS
2975(F) The lexer counted more opening curly or square brackets than closing
2976ones. As a general rule, you'll find it's missing near the place you
2977were last editing.
a0d0e21e 2978
6df41af2
GS
2979=item (Missing semicolon on previous line?)
2980
56da5a46
RGS
2981(S syntax) This is an educated guess made in conjunction with the message
2982"%s found where operator expected". Don't automatically put a semicolon on
6df41af2
GS
2983the previous line just because you saw this message.
2984
a0d0e21e
LW
2985=item Modification of a read-only value attempted
2986
2987(F) You tried, directly or indirectly, to change the value of a
5f05dabc 2988constant. You didn't, of course, try "2 = 1", because the compiler
a0d0e21e
LW
2989catches that. But an easy way to do the same thing is:
2990
2991 sub mod { $_[0] = 1 }
2992 mod(2);
2993
2994Another way is to assign to a substr() that's off the end of the string.
2995
c5674021
PDF
2996Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR>
2997is aliased to a constant in the look I<LIST>:
2998
b7e4ecc1
FC
2999 $x = 1;
3000 foreach my $n ($x, 2) {
3001 $n *= 2; # modifies the $x, but fails on attempt to
3002 } # modify the 2
c5674021 3003
7a4340ed 3004=item Modification of non-creatable array value attempted, %s
a0d0e21e
LW
3005
3006(F) You tried to make an array value spring into existence, and the
3007subscript was probably negative, even counting from end of the array
3008backwards.
3009
7a4340ed 3010=item Modification of non-creatable hash value attempted, %s
a0d0e21e 3011
be771a83
GS
3012(P) You tried to make a hash value spring into existence, and it
3013couldn't be created for some peculiar reason.
a0d0e21e
LW
3014
3015=item Module name must be constant
3016
3017(F) Only a bare module name is allowed as the first argument to a "use".
3018
be98fb35 3019=item Module name required with -%c option
6df41af2 3020
be98fb35
GS
3021(F) The C<-M> or C<-m> options say that Perl should load some module, but
3022you omitted the name of the module. Consult L<perlrun> for full details
3023about C<-M> and C<-m>.
6df41af2 3024
fe13d51d 3025=item More than one argument to '%s' open
ed9aa3b7 3026
6903afa2 3027(F) The C<open> function has been asked to open multiple files. This
ed9aa3b7
SG
3028can happen if you are trying to open a pipe to a command that takes a
3029list of arguments, but have forgotten to specify a piped open mode.
3030See L<perlfunc/open> for details.
3031
a0d0e21e
LW
3032=item msg%s not implemented
3033
3034(F) You don't have System V message IPC on your system.
3035
3036=item Multidimensional syntax %s not supported
3037
75b44862
GS
3038(W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>.
3039They're written like C<$foo[1][2][3]>, as in C.
8b1a09fc 3040
49704364 3041=item '/' must follow a numeric type in unpack
6df41af2 3042
49704364
LW
3043(F) You had an unpack template that contained a '/', but this did not
3044follow some unpack specification producing a numeric value.
3045See L<perlfunc/pack>.
6df41af2
GS
3046
3047=item "my sub" not yet implemented
3048
be771a83
GS
3049(F) Lexically scoped subroutines are not yet implemented. Don't try
3050that yet.
6df41af2 3051
fd1b7234 3052=item "my" variable %s can't be in a package
6df41af2 3053
be771a83
GS
3054(F) Lexically scoped variables aren't in a package, so it doesn't make
3055sense to try to declare one with a package qualifier on the front. Use
3056local() if you want to localize a package variable.
09bef843 3057
8149aa9f
FC
3058=item Name "%s::%s" used only once: possible typo
3059
3060(W once) Typographical errors often show up as unique variable names.
3061If you had a good reason for having a unique name, then just mention it
3062again somehow to suppress the message. The C<our> declaration is
3063provided for this purpose.
3064
3065NOTE: This warning detects symbols that have been used only once so $c, @c,
3066%c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered
3067the same; if a program uses $c only once but also uses any of the others it
3068will not trigger this warning.
3069
6fbc9859
MH
3070=item \N in a character class must be a named character: \N{...} in regex;
3071marked by <-- HERE in m/%s/
ff3f963a 3072
c3c41406 3073(F) The new (5.12) meaning of C<\N> as C<[^\n]> is not valid in a bracketed
f4e361c7
FC
3074character class, for the same reason that C<.> in a character class loses
3075its specialness: it matches almost everything, which is probably not
3076what you want.
c3c41406 3077
aec0ef10 3078=item \N{NAME} must be resolved by the lexer in regex; marked by <-- HERE in m/%s/
c3c41406 3079
f4e361c7
FC
3080(F) When compiling a regex pattern, an unresolved named character or
3081sequence was encountered. This can happen in any of several ways that
3082bypass the lexer, such as using single-quotish context, or an extra
7fae04b9 3083backslash in double-quotish:
c3c41406
KW
3084
3085 $re = '\N{SPACE}'; # Wrong!
b09c05e6 3086 $re = "\\N{SPACE}"; # Wrong!
c3c41406
KW
3087 /$re/;
3088
b09c05e6 3089Instead, use double-quotes with a single backslash:
c3c41406
KW
3090
3091 $re = "\N{SPACE}"; # ok
3092 /$re/;
3093
3094The lexer can be bypassed as well by creating the pattern from smaller
3095components:
3096
3097 $re = '\N';
3098 /${re}{SPACE}/; # Wrong!
3099
3100It's not a good idea to split a construct in the middle like this, and it
3101doesn't work here. Instead use the solution above.
3102
3103Finally, the message also can happen under the C</x> regex modifier when the
3104C<\N> is separated by spaces from the C<{>, in which case, remove the spaces.
3105
3106 /\N {SPACE}/x; # Wrong!
3107 /\N{SPACE}/x; # ok
ff3f963a 3108
0d0b4b3b
KW
3109=item Need exactly 3 octal digits in regex; marked by <-- HERE in m/%s/
3110
3111(F) Within S<C<(?[ ])>>, all constants interpreted as octal need to be
3112exactly 3 digits long. This helps catch some ambiguities. If your
3113constant is too short, add leading zeros, like
3114
3115 (?[ [ \078 ] ]) # Syntax error!
3116 (?[ [ \0078 ] ]) # Works
3117 (?[ [ \007 8 ] ]) # Clearer
3118
3119The maximum number this construct can express is C<\777>. If you
3120need a larger one, you need to use L<\o{}|perlrebackslash/Octal escapes>
3121instead. If you meant two separate things, you need to separate them
3122
3123 (?[ [ \7776 ] ]) # Syntax error!
3124 (?[ [ \o{7776} ] ]) # One meaning
3125 (?[ [ \777 6 ] ]) # Another meaning
3126 (?[ [ \777 \006 ] ]) # Still another
3127
49704364
LW
3128=item Negative '/' count in unpack
3129
3130(F) The length count obtained from a length/code unpack operation was
3131negative. See L<perlfunc/pack>.
3132
a0d0e21e
LW
3133=item Negative length
3134
be771a83
GS
3135(F) You tried to do a read/write/send/recv operation with a buffer
3136length that is less than 0. This is difficult to imagine.
a0d0e21e 3137
ed9aa3b7
SG
3138=item Negative offset to vec in lvalue context
3139
3140(F) When C<vec> is called in an lvalue context, the second argument must be
3141greater than or equal to zero.
3142
7253e4e3 3143=item Nested quantifiers in regex; marked by <-- HERE in m/%s/
a0d0e21e 3144
6903afa2 3145(F) You can't quantify a quantifier without intervening parentheses.
9e3ec65c
FC
3146So things like ** or +* or ?* are illegal. The <-- HERE shows
3147whereabouts in the regular expression the problem was discovered.
a0d0e21e 3148
7253e4e3 3149Note that the minimal matching quantifiers, C<*?>, C<+?>, and
be771a83 3150C<??> appear to be nested quantifiers, but aren't. See L<perlre>.
a0d0e21e 3151
6df41af2 3152=item %s never introduced
a0d0e21e 3153
be771a83
GS
3154(S internal) The symbol in question was declared but somehow went out of
3155scope before it could possibly have been used.
a0d0e21e 3156
2c7d6b9c
RGS
3157=item next::method/next::can/maybe::next::method cannot find enclosing method
3158
3159(F) C<next::method> needs to be called within the context of a
3160real method in a real package, and it could not find such a context.
3161See L<mro>.
3162
a0d0e21e
LW
3163=item No %s allowed while running setuid
3164
be771a83
GS
3165(F) Certain operations are deemed to be too insecure for a setuid or
3166setgid script to even be allowed to attempt. Generally speaking there
3167will be another way to do what you want that is, if not secure, at least
3168securable. See L<perlsec>.
a0d0e21e 3169
6651ba0b
FC
3170=item No code specified for -%c
3171
3172(F) Perl's B<-e> and B<-E> command-line options require an argument. If
3173you want to run an empty program, pass the empty string as a separate
3174argument or run a program consisting of a single 0 or 1:
3175
3176 perl -e ""
3177 perl -e0
3178 perl -e1
3179
a0d0e21e
LW
3180=item No comma allowed after %s
3181
6903afa2
FC
3182(F) A list operator that has a filehandle or "indirect object" is
3183not allowed to have a comma between that and the following arguments.
a0d0e21e
LW
3184Otherwise it'd be just another one of the arguments.
3185
6903afa2
FC
3186One possible cause for this is that you expected to have imported
3187a constant to your name space with B<use> or B<import> while no such
3188importing took place, it may for example be that your operating
3189system does not support that particular constant. Hopefully you did
3190use an explicit import list for the constants you expect to see;
3191please see L<perlfunc/use> and L<perlfunc/import>. While an
3192explicit import list would probably have caught this error earlier
3193it naturally does not remedy the fact that your operating system
3194still does not support that constant. Maybe you have a typo in
3195the constants of the symbol import list of B<use> or B<import> or in the
3196constant name at the line where this error was triggered?
0a753a76 3197
748a9306
LW
3198=item No command into which to pipe on command line
3199
be771a83
GS
3200(F) An error peculiar to VMS. Perl handles its own command line
3201redirection, and found a '|' at the end of the command line, so it
3202doesn't know where you want to pipe the output from this command.
748a9306 3203
a0d0e21e
LW
3204=item No DB::DB routine defined
3205
be771a83 3206(F) The currently executing code was compiled with the B<-d> switch, but
f7af5ce1 3207for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
ccafdc96
RGS
3208module) didn't define a routine to be called at the beginning of each
3209statement.
a0d0e21e
LW
3210
3211=item No dbm on this machine
3212
3213(P) This is counted as an internal error, because every machine should
5f05dabc 3214supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
a0d0e21e 3215
ccafdc96 3216=item No DB::sub routine defined
a0d0e21e 3217
ccafdc96
RGS
3218(F) The currently executing code was compiled with the B<-d> switch, but
3219for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
3220module) didn't define a C<DB::sub> routine to be called at the beginning
3221of each ordinary subroutine call.
a0d0e21e 3222
6651ba0b
FC
3223=item No directory specified for -I
3224
3225(F) The B<-I> command-line switch requires a directory name as part of the
3226I<same> argument. Use B<-Ilib>, for instance. B<-I lib> won't work.
3227
c47ff5f1 3228=item No error file after 2> or 2>> on command line
748a9306 3229
be771a83
GS
3230(F) An error peculiar to VMS. Perl handles its own command line
3231redirection, and found a '2>' or a '2>>' on the command line, but can't
3232find the name of the file to which to write data destined for stderr.
748a9306 3233
49704364
LW
3234=item No group ending character '%c' found in template
3235
3236(F) A pack or unpack template has an opening '(' or '[' without its
6903afa2 3237matching counterpart. See L<perlfunc/pack>.
49704364 3238
c47ff5f1 3239=item No input file after < on command line
748a9306 3240
be771a83
GS
3241(F) An error peculiar to VMS. Perl handles its own command line
3242redirection, and found a '<' on the command line, but can't find the
3243name of the file from which to read data for stdin.
748a9306 3244
2c7d6b9c
RGS
3245=item No next::method '%s' found for %s
3246
3247(F) C<next::method> found no further instances of this method name
3248in the remaining packages of the MRO of this class. If you don't want
3249it throwing an exception, use C<maybe::next::method>
fa816bf3 3250or C<next::can>. See L<mro>.
2c7d6b9c 3251
6df41af2
GS
3252=item "no" not allowed in expression
3253
be771a83
GS
3254(F) The "no" keyword is recognized and executed at compile time, and
3255returns no useful value. See L<perlmod>.
6df41af2 3256
c47ff5f1 3257=item No output file after > on command line
748a9306 3258
be771a83
GS
3259(F) An error peculiar to VMS. Perl handles its own command line
3260redirection, and found a lone '>' at the end of the command line, so it
3261doesn't know where you wanted to redirect stdout.
748a9306 3262
c47ff5f1 3263=item No output file after > or >> on command line
748a9306 3264
be771a83
GS
3265(F) An error peculiar to VMS. Perl handles its own command line
3266redirection, and found a '>' or a '>>' on the command line, but can't
3267find the name of the file to which to write data destined for stdout.
748a9306 3268
1ec3e8de
GS
3269=item No package name allowed for variable %s in "our"
3270
be771a83
GS
3271(F) Fully qualified variable names are not allowed in "our"
3272declarations, because that doesn't make much sense under existing
3273semantics. Such syntax is reserved for future extensions.
1ec3e8de 3274
a0d0e21e
LW
3275=item No Perl script found in input
3276
3277(F) You called C<perl -x>, but no line was found in the file beginning
3278with #! and containing the word "perl".
3279
3280=item No setregid available
3281
3282(F) Configure didn't find anything resembling the setregid() call for
3283your system.
3284
3285=item No setreuid available
3286
3287(F) Configure didn't find anything resembling the setreuid() call for
3288your system.
3289
e75d1f10
RD
3290=item No such class field "%s" in variable %s of type %s
3291
b7e4ecc1
FC
3292(F) You tried to access a key from a hash through the indicated typed
3293variable but that key is not allowed by the package of the same type.
3294The indicated package has restricted the set of allowed keys using the
3295L<fields> pragma.
e75d1f10 3296
2c692339
RGS
3297=item No such class %s
3298
dc7e5945
FC
3299(F) You provided a class qualifier in a "my", "our" or "state"
3300declaration, but this class doesn't exist at this point in your program.
2c692339 3301
3c20a832
SP
3302=item No such hook: %s
3303
dc7e5945
FC
3304(F) You specified a signal hook that was not recognized by Perl.
3305Currently, Perl accepts C<__DIE__> and C<__WARN__> as valid signal hooks.