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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).
11 (D) A deprecation (optional).
e476b1b5 12 (S) A severe warning (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
23below.
24
25Optional warnings are enabled by using the C<warnings> pragma or the B<-w>
26and B<-W> switches. Warnings may be captured by setting C<$SIG{__WARN__}>
27to a reference to a routine that will be called on each warning instead
28of printing it. See L<perlvar>.
29
30Default warnings are always enabled unless they are explicitly disabled
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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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
6df41af2 53=item Allocation too large: %lx
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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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
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88(W ambiguous)(S) You said something that may not be interpreted the way
89you thought. Normally it's pretty easy to disambiguate it by supplying
90a missing quote, operator, parenthesis pair or declaration.
a0d0e21e 91
6df41af2 92=item '|' and '<' may not both be specified on command line
a0d0e21e 93
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94(F) An error peculiar to VMS. Perl does its own command line
95redirection, and found that STDIN was a pipe, and that you also tried to
96redirect STDIN using '<'. Only one STDIN stream to a customer, please.
c9f97d15 97
6df41af2 98=item '|' and '>' may not both be specified on command line
1028017a 99
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100(F) An error peculiar to VMS. Perl does its own command line
101redirection, and thinks you tried to redirect stdout both to a file and
102into a pipe to another command. You need to choose one or the other,
103though nothing's stopping you from piping into a program or Perl script
104which 'splits' output into two streams, such as
1028017a 105
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106 open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
107 while (<STDIN>) {
108 print;
109 print OUT;
110 }
111 close OUT;
c9f97d15 112
6df41af2 113=item Applying %s to %s will act on scalar(%s)
eb6e2d6f 114
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115(W misc) The pattern match (C<//>), substitution (C<s///>), and
116transliteration (C<tr///>) operators work on scalar values. If you apply
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117one of them to an array or a hash, it will convert the array or hash to
118a scalar value -- the length of an array, or the population info of a
119hash -- and then work on that scalar value. This is probably not what
120you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for
121alternatives.
eb6e2d6f 122
6df41af2 123=item Args must match #! line
a0d0e21e 124
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125(F) The setuid emulator requires that the arguments Perl was invoked
126with match the arguments specified on the #! line. Since some systems
127impose a one-argument limit on the #! line, try combining switches;
128for example, turn C<-w -U> into C<-wU>.
a0d0e21e 129
6df41af2 130=item Arg too short for msgsnd
76cd736e 131
6df41af2 132(F) msgsnd() requires a string at least as long as sizeof(long).
76cd736e 133
8ea97a1e 134=item %s argument is not a HASH or ARRAY element
a0d0e21e 135
8ea97a1e 136(F) The argument to exists() must be a hash or array element, such as:
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137
138 $foo{$bar}
cb4f522a 139 $ref->{"susie"}[12]
a0d0e21e 140
8ea97a1e 141=item %s argument is not a HASH or ARRAY element or slice
5f05dabc 142
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143(F) The argument to delete() must be either a hash or array element,
144such as:
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145
146 $foo{$bar}
cb4f522a 147 $ref->{"susie"}[12]
5f05dabc 148
8ea97a1e 149or a hash or array slice, such as:
5f05dabc 150
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151 @foo[$bar, $baz, $xyzzy]
152 @{$ref->[12]}{"susie", "queue"}
5315574d 153
6df41af2 154=item %s argument is not a subroutine name
a0d0e21e 155
6df41af2 156(F) The argument to exists() for C<exists &sub> must be a subroutine
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157name, and not a subroutine call. C<exists &sub()> will generate this
158error.
a0d0e21e 159
f86702cc 160=item Argument "%s" isn't numeric%s
a0d0e21e 161
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162(W numeric) The indicated string was fed as an argument to an operator
163that expected a numeric value instead. If you're fortunate the message
164will identify which operator was so unfortunate.
a0d0e21e 165
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166=item Argument list not closed for PerlIO layer "%s"
167
168(W layer) When pushing a layer with arguments onto the Perl I/O system you
169forgot the ) that closes the argument list. (Layers take care of transforming
170data between external and internal representations.) Perl stopped parsing
171the layer list at this point and did not attempt to push this layer.
172If your program didn't explicitly request the failing operation, it may be
173the result of the value of the environment variable PERLIO.
174
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175=item Array @%s missing the @ in argument %d of %s()
176
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177(D deprecated) Really old Perl let you omit the @ on array names in some
178spots. This is now heavily deprecated.
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179
180=item assertion botched: %s
181
182(P) The malloc package that comes with Perl had an internal failure.
183
184=item Assertion failed: file "%s"
185
186(P) A general assertion failed. The file in question must be examined.
187
188=item Assignment to both a list and a scalar
189
190(F) If you assign to a conditional operator, the 2nd and 3rd arguments
191must either both be scalars or both be lists. Otherwise Perl won't
192know which context to supply to the right side.
193
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194=item A thread exited while %d threads were running
195
4447dfc1 196(W threads)(S) When using threaded Perl, a thread (not necessarily the main
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197thread) exited while there were still other threads running.
198Usually it's a good idea to first collect the return values of the
199created threads by joining them, and only then exit from the main
200thread. See L<threads>.
201
2393f1b9 202=item Attempt to access disallowed key '%s' in a restricted hash
1b1f1335 203
49293501 204(F) The failing code has attempted to get or set a key which is not in
2393f1b9 205the current set of allowed keys of a restricted hash.
49293501 206
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207=item Attempt to bless into a reference
208
209(F) The CLASSNAME argument to the bless() operator is expected to be
210the name of the package to bless the resulting object into. You've
211supplied instead a reference to something: perhaps you wrote
212
213 bless $self, $proto;
214
215when you intended
216
217 bless $self, ref($proto) || $proto;
218
219If you actually want to bless into the stringified version
220of the reference supplied, you need to stringify it yourself, for
221example by:
222
223 bless $self, "$proto";
224
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225=item Attempt to delete disallowed key '%s' from a restricted hash
226
227(F) The failing code attempted to delete from a restricted hash a key
228which is not in its key set.
229
230=item Attempt to delete readonly key '%s' from a restricted hash
231
232(F) The failing code attempted to delete a key whose value has been
233declared readonly from a restricted hash.
234
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235=item Attempt to free non-arena SV: 0x%lx
236
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237(P internal) All SV objects are supposed to be allocated from arenas
238that will be garbage collected on exit. An SV was discovered to be
239outside any of those arenas.
a0d0e21e 240
54310121 241=item Attempt to free nonexistent shared string
bbce6d69 242
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243(P internal) Perl maintains a reference counted internal table of
244strings to optimize the storage and access of hash keys and other
245strings. This indicates someone tried to decrement the reference count
246of a string that can no longer be found in the table.
bbce6d69 247
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248=item Attempt to free temp prematurely
249
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250(W debugging) Mortalized values are supposed to be freed by the
251free_tmps() routine. This indicates that something else is freeing the
252SV before the free_tmps() routine gets a chance, which means that the
253free_tmps() routine will be freeing an unreferenced scalar when it does
254try to free it.
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255
256=item Attempt to free unreferenced glob pointers
257
e476b1b5 258(P internal) The reference counts got screwed up on symbol aliases.
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259
260=item Attempt to free unreferenced scalar
261
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262(W internal) Perl went to decrement the reference count of a scalar to
263see if it would go to 0, and discovered that it had already gone to 0
264earlier, and should have been freed, and in fact, probably was freed.
265This could indicate that SvREFCNT_dec() was called too many times, or
266that SvREFCNT_inc() was called too few times, or that the SV was
267mortalized when it shouldn't have been, or that memory has been
268corrupted.
a0d0e21e 269
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270=item Attempt to join self
271
272(F) You tried to join a thread from within itself, which is an
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273impossible task. You may be joining the wrong thread, or you may need
274to move the join() to some other thread.
dcdda58d 275
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276=item Attempt to pack pointer to temporary value
277
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278(W pack) You tried to pass a temporary value (like the result of a
279function, or a computed expression) to the "p" pack() template. This
280means the result contains a pointer to a location that could become
281invalid anytime, even before the end of the current statement. Use
282literals or global values as arguments to the "p" pack() template to
283avoid this warning.
84902520 284
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285=item Attempt to set length of freed array
286
287(W) You tried to set the length of an array which has been freed. You
288can do this by storing a reference to the scalar representing the last index
289of an array and later assigning through that reference. For example
290
291 $r = do {my @a; \$#a};
292 $$r = 503
293
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294=item Attempt to use reference as lvalue in substr
295
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296(W substr) You supplied a reference as the first argument to substr()
297used as an lvalue, which is pretty strange. Perhaps you forgot to
298dereference it first. See L<perlfunc/substr>.
b7a902f4 299
dc26df50 300=item Bad arg length for %s, is %d, should be %s
a0d0e21e 301
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302(F) You passed a buffer of the wrong size to one of msgctl(), semctl()
303or shmctl(). In C parlance, the correct sizes are, respectively,
5f05dabc 304S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and
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305S<sizeof(struct shmid_ds *)>.
306
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307=item Bad evalled substitution pattern
308
496a33f5 309(F) You've used the C</e> switch to evaluate the replacement for a
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310substitution, but perl found a syntax error in the code to evaluate,
311most likely an unexpected right brace '}'.
312
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313=item Bad filehandle: %s
314
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315(F) A symbol was passed to something wanting a filehandle, but the
316symbol has no filehandle associated with it. Perhaps you didn't do an
317open(), or did it in another package.
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318
319=item Bad free() ignored
320
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321(S malloc) An internal routine called free() on something that had never
322been malloc()ed in the first place. Mandatory, but can be disabled by
9ea8bc6d 323setting environment variable C<PERL_BADFREE> to 0.
33c8a3fe 324
9ea8bc6d 325This message can be seen quite often with DB_File on systems with "hard"
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326dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB>
327which is left unnoticed if C<DB> uses I<forgiving> system malloc().
a0d0e21e 328
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PP
329=item Bad hash
330
331(P) One of the internal hash routines was passed a null HV pointer.
332
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333=item Badly placed ()'s
334
335(A) You've accidentally run your script through B<csh> instead
336of Perl. Check the #! line, or manually feed your script into
337Perl yourself.
338
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339=item Bad name after %s::
340
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341(F) You started to name a symbol by using a package prefix, and then
342didn't finish the symbol. In particular, you can't interpolate outside
343of quotes, so
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344
345 $var = 'myvar';
346 $sym = mypack::$var;
347
348is not the same as
349
350 $var = 'myvar';
351 $sym = "mypack::$var";
352
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353=item Bad realloc() ignored
354
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355(S malloc) An internal routine called realloc() on something that had
356never been malloc()ed in the first place. Mandatory, but can be disabled
357by setting environment variable C<PERL_BADFREE> to 1.
4ad56ec9 358
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359=item Bad symbol for array
360
361(P) An internal request asked to add an array entry to something that
362wasn't a symbol table entry.
363
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364=item Bad symbol for dirhandle
365
366(P) An internal request asked to add a dirhandle entry to something
367that wasn't a symbol table entry.
368
369
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370=item Bad symbol for filehandle
371
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372(P) An internal request asked to add a filehandle entry to something
373that wasn't a symbol table entry.
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374
375=item Bad symbol for hash
376
377(P) An internal request asked to add a hash entry to something that
378wasn't a symbol table entry.
379
34d09196
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380=item Bareword found in conditional
381
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382(W bareword) The compiler found a bareword where it expected a
383conditional, which often indicates that an || or && was parsed as part
384of the last argument of the previous construct, for example:
34d09196
GS
385
386 open FOO || die;
387
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388It may also indicate a misspelled constant that has been interpreted as
389a bareword:
34d09196
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390
391 use constant TYPO => 1;
392 if (TYOP) { print "foo" }
393
394The C<strict> pragma is useful in avoiding such errors.
395
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396=item Bareword "%s" not allowed while "strict subs" in use
397
398(F) With "strict subs" in use, a bareword is only allowed as a
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399subroutine identifier, in curly brackets or to the left of the "=>"
400symbol. Perhaps you need to predeclare a subroutine?
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401
402=item Bareword "%s" refers to nonexistent package
403
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404(W bareword) You used a qualified bareword of the form C<Foo::>, but the
405compiler saw no other uses of that namespace before that point. Perhaps
406you need to predeclare a package?
6df41af2 407
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408=item BEGIN failed--compilation aborted
409
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410(F) An untrapped exception was raised while executing a BEGIN
411subroutine. Compilation stops immediately and the interpreter is
412exited.
a0d0e21e 413
68dc0745
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414=item BEGIN not safe after errors--compilation aborted
415
416(F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which
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417implies a C<BEGIN {}>) after one or more compilation errors had already
418occurred. Since the intended environment for the C<BEGIN {}> could not
419be guaranteed (due to the errors), and since subsequent code likely
420depends on its correct operation, Perl just gave up.
68dc0745 421
6df41af2
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422=item \1 better written as $1
423
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424(W syntax) Outside of patterns, backreferences live on as variables.
425The use of backslashes is grandfathered on the right-hand side of a
426substitution, but stylistically it's better to use the variable form
427because other Perl programmers will expect it, and it works better if
428there are more than 9 backreferences.
6df41af2 429
252aa082
JH
430=item Binary number > 0b11111111111111111111111111111111 non-portable
431
e476b1b5 432(W portable) The binary number you specified is larger than 2**32-1
9e24b6e2
JH
433(4294967295) and therefore non-portable between systems. See
434L<perlport> for more on portability concerns.
252aa082 435
69282e91 436=item bind() on closed socket %s
a0d0e21e 437
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438(W closed) You tried to do a bind on a closed socket. Did you forget to
439check the return value of your socket() call? See L<perlfunc/bind>.
a0d0e21e 440
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JH
441=item binmode() on closed filehandle %s
442
443(W unopened) You tried binmode() on a filehandle that was never opened.
444Check you control flow and number of arguments.
445
c5a0f51a
JH
446=item Bit vector size > 32 non-portable
447
e476b1b5 448(W portable) Using bit vector sizes larger than 32 is non-portable.
c5a0f51a 449
4633a7c4
LW
450=item Bizarre copy of %s in %s
451
be771a83 452(P) Perl detected an attempt to copy an internal value that is not
b45f050a 453copyable.
4633a7c4 454
f675dbe5
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455=item Buffer overflow in prime_env_iter: %s
456
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457(W internal) A warning peculiar to VMS. While Perl was preparing to
458iterate over %ENV, it encountered a logical name or symbol definition
459which was too long, so it was truncated to the string shown.
f675dbe5 460
a0d0e21e
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461=item Callback called exit
462
4929bf7b 463(F) A subroutine invoked from an external package via call_sv()
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464exited by calling exit.
465
6df41af2 466=item %s() called too early to check prototype
f675dbe5 467
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468(W prototype) You've called a function that has a prototype before the
469parser saw a definition or declaration for it, and Perl could not check
470that the call conforms to the prototype. You need to either add an
471early prototype declaration for the subroutine in question, or move the
472subroutine definition ahead of the call to get proper prototype
473checking. Alternatively, if you are certain that you're calling the
474function correctly, you may put an ampersand before the name to avoid
475the warning. See L<perlsub>.
f675dbe5 476
49704364 477=item Cannot compress integer in pack
0258719b
NC
478
479(F) An argument to pack("w",...) was too large to compress. The BER
480compressed integer format can only be used with positive integers, and you
481attempted to compress Infinity or a very large number (> 1e308).
482See L<perlfunc/pack>.
483
49704364 484=item Cannot compress negative numbers in pack
0258719b
NC
485
486(F) An argument to pack("w",...) was negative. The BER compressed integer
487format can only be used with positive integers. See L<perlfunc/pack>.
488
5c1f4d79
NC
489=item Cannot convert a reference to %s to typeglob
490
491(F) You manipulated Perl's symbol table directly, stored a reference in it,
492then tried to access that symbol via conventional Perl syntax. The access
493triggers Perl to autovivify that typeglob, but it there is no legal conversion
494from that type of reference to a typeglob.
495
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496=item Can only compress unsigned integers in pack
497
498(F) An argument to pack("w",...) was not an integer. The BER compressed
499integer format can only be used with positive integers, and you attempted
500to compress something else. See L<perlfunc/pack>.
501
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502=item Can't bless non-reference value
503
504(F) Only hard references may be blessed. This is how Perl "enforces"
505encapsulation of objects. See L<perlobj>.
506
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507=item Can't "break" in a loop topicalizer
508
0d863452
RH
509(F) You called C<break>, but you're in a C<foreach> block rather than
510a C<given> block. You probably meant to use C<next> or C<last>.
511
512=item Can't "break" outside a given block
dc57907a 513
0d863452
RH
514(F) You called C<break>, but you're not inside a C<given> block.
515
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516=item Can't call method "%s" in empty package "%s"
517
518(F) You called a method correctly, and it correctly indicated a package
519functioning as a class, but that package doesn't have ANYTHING defined
520in it, let alone methods. See L<perlobj>.
521
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522=item Can't call method "%s" on an undefined value
523
524(F) You used the syntax of a method call, but the slot filled by the
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525object reference or package name contains an undefined value. Something
526like this will reproduce the error:
6df41af2
GS
527
528 $BADREF = undef;
529 process $BADREF 1,2,3;
530 $BADREF->process(1,2,3);
531
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532=item Can't call method "%s" on unblessed reference
533
54310121 534(F) A method call must know in what package it's supposed to run. It
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535ordinarily finds this out from the object reference you supply, but you
536didn't supply an object reference in this case. A reference isn't an
537object reference until it has been blessed. See L<perlobj>.
a0d0e21e
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538
539=item Can't call method "%s" without a package or object reference
540
541(F) You used the syntax of a method call, but the slot filled by the
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542object reference or package name contains an expression that returns a
543defined value which is neither an object reference nor a package name.
72b5445b
GS
544Something like this will reproduce the error:
545
546 $BADREF = 42;
547 process $BADREF 1,2,3;
548 $BADREF->process(1,2,3);
549
a0d0e21e
LW
550=item Can't chdir to %s
551
552(F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory
553that you can chdir to, possibly because it doesn't exist.
554
0545a864 555=item Can't check filesystem of script "%s" for nosuid
104d25b7 556
be771a83
GS
557(P) For some reason you can't check the filesystem of the script for
558nosuid.
104d25b7 559
6df41af2
GS
560=item Can't coerce array into hash
561
562(F) You used an array where a hash was expected, but the array has no
563information on how to map from keys to array indices. You can do that
564only with arrays that have a hash reference at index 0.
565
a0d0e21e
LW
566=item Can't coerce %s to integer in %s
567
568(F) Certain types of SVs, in particular real symbol table entries
55497cff 569(typeglobs), can't be forced to stop being what they are. So you can't
a0d0e21e
LW
570say things like:
571
572 *foo += 1;
573
574You CAN say
575
576 $foo = *foo;
577 $foo += 1;
578
579but then $foo no longer contains a glob.
580
581=item Can't coerce %s to number in %s
582
583(F) Certain types of SVs, in particular real symbol table entries
55497cff 584(typeglobs), can't be forced to stop being what they are.
a0d0e21e
LW
585
586=item Can't coerce %s to string in %s
587
588(F) Certain types of SVs, in particular real symbol table entries
55497cff 589(typeglobs), can't be forced to stop being what they are.
a0d0e21e 590
0d863452 591=item Can't "continue" outside a when block
dc57907a 592
0d863452
RH
593(F) You called C<continue>, but you're not inside a C<when>
594or C<default> block.
595
a0d0e21e
LW
596=item Can't create pipe mailbox
597
be771a83
GS
598(P) An error peculiar to VMS. The process is suffering from exhausted
599quotas or other plumbing problems.
a0d0e21e 600
eb64745e 601=item Can't declare class for non-scalar %s in "%s"
a0d0e21e 602
2f7e735d
AMS
603(F) Currently, only scalar variables can be declared with a specific
604class qualifier in a "my" or "our" declaration. The semantics may be
605extended for other types of variables in future.
eb64745e
GS
606
607=item Can't declare %s in "%s"
608
609(F) Only scalar, array, and hash variables may be declared as "my" or
610"our" variables. They must have ordinary identifiers as names.
a0d0e21e 611
6df41af2
GS
612=item Can't do inplace edit: %s is not a regular file
613
be771a83
GS
614(S inplace) You tried to use the B<-i> switch on a special file, such as
615a file in /dev, or a FIFO. The file was ignored.
6df41af2 616
a0d0e21e
LW
617=item Can't do inplace edit on %s: %s
618
be771a83
GS
619(S inplace) The creation of the new file failed for the indicated
620reason.
a0d0e21e 621
54310121 622=item Can't do inplace edit without backup
a0d0e21e 623
be771a83
GS
624(F) You're on a system such as MS-DOS that gets confused if you try
625reading from a deleted (but still opened) file. You have to say
626C<-i.bak>, or some such.
a0d0e21e 627
10f9c03d 628=item Can't do inplace edit: %s would not be unique
a0d0e21e 629
e476b1b5 630(S inplace) Your filesystem does not support filenames longer than 14
10f9c03d
CK
631characters and Perl was unable to create a unique filename during
632inplace editing with the B<-i> switch. The file was ignored.
a0d0e21e 633
7253e4e3 634=item Can't do {n,m} with n > m in regex; marked by <-- HERE in m/%s/
a0d0e21e 635
b45f050a 636(F) Minima must be less than or equal to maxima. If you really want your
7253e4e3 637regexp to match something 0 times, just put {0}. The <-- HERE shows in the
b45f050a 638regular expression about where the problem was discovered. See L<perlre>.
a0d0e21e
LW
639
640=item Can't do setegid!
641
be771a83
GS
642(P) The setegid() call failed for some reason in the setuid emulator of
643suidperl.
a0d0e21e
LW
644
645=item Can't do seteuid!
646
647(P) The setuid emulator of suidperl failed for some reason.
648
649=item Can't do setuid
650
be771a83
GS
651(F) This typically means that ordinary perl tried to exec suidperl to do
652setuid emulation, but couldn't exec it. It looks for a name of the form
653sperl5.000 in the same directory that the perl executable resides under
654the name perl5.000, typically /usr/local/bin on Unix machines. If the
655file is there, check the execute permissions. If it isn't, ask your
656sysadmin why he and/or she removed it.
a0d0e21e
LW
657
658=item Can't do waitpid with flags
659
be771a83
GS
660(F) This machine doesn't have either waitpid() or wait4(), so only
661waitpid() without flags is emulated.
a0d0e21e 662
a0d0e21e
LW
663=item Can't emulate -%s on #! line
664
be771a83
GS
665(F) The #! line specifies a switch that doesn't make sense at this
666point. For example, it'd be kind of silly to put a B<-x> on the #!
667line.
a0d0e21e 668
1109a392
MHM
669=item Can't %s %s-endian %ss on this platform
670
671(F) Your platform's byte-order is neither big-endian nor little-endian,
672or it has a very strange pointer size. Packing and unpacking big- or
673little-endian floating point values and pointers may not be possible.
674See L<perlfunc/pack>.
675
a0d0e21e
LW
676=item Can't exec "%s": %s
677
d1be9408 678(W exec) A system(), exec(), or piped open call could not execute the
be771a83
GS
679named program for the indicated reason. Typical reasons include: the
680permissions were wrong on the file, the file wasn't found in
681C<$ENV{PATH}>, the executable in question was compiled for another
682architecture, or the #! line in a script points to an interpreter that
683can't be run for similar reasons. (Or maybe your system doesn't support
684#! at all.)
a0d0e21e
LW
685
686=item Can't exec %s
687
be771a83
GS
688(F) Perl was trying to execute the indicated program for you because
689that's what the #! line said. If that's not what you wanted, you may
690need to mention "perl" on the #! line somewhere.
a0d0e21e
LW
691
692=item Can't execute %s
693
be771a83
GS
694(F) You used the B<-S> switch, but the copies of the script to execute
695found in the PATH did not have correct permissions.
2a92aaa0 696
6df41af2 697=item Can't find an opnumber for "%s"
2a92aaa0 698
be771a83
GS
699(F) A string of a form C<CORE::word> was given to prototype(), but there
700is no builtin with the name C<word>.
6df41af2 701
56ca2fc0
JH
702=item Can't find %s character property "%s"
703
704(F) You used C<\p{}> or C<\P{}> but the character property by that name
89d60977 705could not be found. Maybe you misspelled the name of the property
56ca2fc0
JH
706(remember that the names of character properties consist only of
707alphanumeric characters), or maybe you forgot the C<Is> or C<In> prefix?
708
6df41af2
GS
709=item Can't find label %s
710
be771a83
GS
711(F) You said to goto a label that isn't mentioned anywhere that it's
712possible for us to go to. See L<perlfunc/goto>.
2a92aaa0
GS
713
714=item Can't find %s on PATH
715
be771a83
GS
716(F) You used the B<-S> switch, but the script to execute could not be
717found in the PATH.
a0d0e21e 718
6df41af2 719=item Can't find %s on PATH, '.' not in PATH
a0d0e21e 720
be771a83
GS
721(F) You used the B<-S> switch, but the script to execute could not be
722found in the PATH, or at least not with the correct permissions. The
723script exists in the current directory, but PATH prohibits running it.
a0d0e21e
LW
724
725=item Can't find string terminator %s anywhere before EOF
726
be771a83
GS
727(F) Perl strings can stretch over multiple lines. This message means
728that the closing delimiter was omitted. Because bracketed quotes count
729nesting levels, the following is missing its final parenthesis:
a0d0e21e 730
fb73857a
PP
731 print q(The character '(' starts a side comment.);
732
be771a83
GS
733If you're getting this error from a here-document, you may have included
734unseen whitespace before or after your closing tag. A good programmer's
735editor will have a way to help you find these characters.
a0d0e21e 736
660a4616
ST
737=item Can't find Unicode property definition "%s"
738
739(F) You may have tried to use C<\p> which means a Unicode property (for
740example C<\p{Lu}> is all uppercase letters). If you did mean to use a
741Unicode property, see L<perlunicode> for the list of known properties.
742If you didn't mean to use a Unicode property, escape the C<\p>, either
743by C<\\p> (just the C<\p>) or by C<\Q\p> (the rest of the string, until
744possible C<\E>).
745
a0d0e21e
LW
746=item Can't fork
747
be771a83
GS
748(F) A fatal error occurred while trying to fork while opening a
749pipeline.
a0d0e21e 750
748a9306
LW
751=item Can't get filespec - stale stat buffer?
752
be771a83
GS
753(S) A warning peculiar to VMS. This arises because of the difference
754between access checks under VMS and under the Unix model Perl assumes.
755Under VMS, access checks are done by filename, rather than by bits in
756the stat buffer, so that ACLs and other protections can be taken into
757account. Unfortunately, Perl assumes that the stat buffer contains all
758the necessary information, and passes it, instead of the filespec, to
759the access checking routine. It will try to retrieve the filespec using
760the device name and FID present in the stat buffer, but this works only
761if you haven't made a subsequent call to the CRTL stat() routine,
762because the device name is overwritten with each call. If this warning
763appears, the name lookup failed, and the access checking routine gave up
764and returned FALSE, just to be conservative. (Note: The access checking
765routine knows about the Perl C<stat> operator and file tests, so you
766shouldn't ever see this warning in response to a Perl command; it arises
767only if some internal code takes stat buffers lightly.)
748a9306 768
a0d0e21e
LW
769=item Can't get pipe mailbox device name
770
be771a83
GS
771(P) An error peculiar to VMS. After creating a mailbox to act as a
772pipe, Perl can't retrieve its name for later use.
a0d0e21e
LW
773
774=item Can't get SYSGEN parameter value for MAXBUF
775
748a9306
LW
776(P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
777mailbox buffers to be, and didn't get an answer.
a0d0e21e 778
6df41af2 779=item Can't "goto" into the middle of a foreach loop
a0d0e21e 780
be771a83
GS
781(F) A "goto" statement was executed to jump into the middle of a foreach
782loop. You can't get there from here. See L<perlfunc/goto>.
6df41af2
GS
783
784=item Can't "goto" out of a pseudo block
785
be771a83
GS
786(F) A "goto" statement was executed to jump out of what might look like
787a block, except that it isn't a proper block. This usually occurs if
788you tried to jump out of a sort() block or subroutine, which is a no-no.
789See L<perlfunc/goto>.
a0d0e21e 790
9850bf21 791=item Can't goto subroutine from a sort sub (or similar callback)
cd299c6e 792
9850bf21
RH
793(F) The "goto subroutine" call can't be used to jump out of the
794comparison sub for a sort(), or from a similar callback (such
795as the reduce() function in List::Util).
796
c74ace89 797=item Can't goto subroutine from an eval-%s
b150fb22 798
be771a83 799(F) The "goto subroutine" call can't be used to jump out of an eval
c74ace89 800"string" or block.
b150fb22 801
6df41af2
GS
802=item Can't goto subroutine outside a subroutine
803
be771a83
GS
804(F) The deeply magical "goto subroutine" call can only replace one
805subroutine call for another. It can't manufacture one out of whole
806cloth. In general you should be calling it out of only an AUTOLOAD
807routine anyway. See L<perlfunc/goto>.
6df41af2 808
0b5b802d
GS
809=item Can't ignore signal CHLD, forcing to default
810
be771a83
GS
811(W signal) Perl has detected that it is being run with the SIGCHLD
812signal (sometimes known as SIGCLD) disabled. Since disabling this
813signal will interfere with proper determination of exit status of child
814processes, Perl has reset the signal to its default value. This
815situation typically indicates that the parent program under which Perl
816may be running (e.g. cron) is being very careless.
0b5b802d 817
6df41af2 818=item Can't "last" outside a loop block
4633a7c4 819
6df41af2 820(F) A "last" statement was executed to break out of the current block,
be771a83
GS
821except that there's this itty bitty problem called there isn't a current
822block. Note that an "if" or "else" block doesn't count as a "loopish"
823block, as doesn't a block given to sort(), map() or grep(). You can
824usually double the curlies to get the same effect though, because the
825inner curlies will be considered a block that loops once. See
826L<perlfunc/last>.
4633a7c4 827
b8170e59
JB
828=item Can't load '%s' for module %s
829
830(F) The module you tried to load failed to load a dynamic extension. This
831may either mean that you upgraded your version of perl to one that is
832incompatible with your old dynamic extensions (which is known to happen
833between major versions of perl), or (more likely) that your dynamic
16d98ec5 834extension was built against an older version of the library that is
b8170e59
JB
835installed on your system. You may need to rebuild your old dynamic
836extensions.
837
748a9306
LW
838=item Can't localize lexical variable %s
839
2ba9eb46 840(F) You used local on a variable name that was previously declared as a
748a9306
LW
841lexical variable using "my". This is not allowed. If you want to
842localize a package variable of the same name, qualify it with the
843package name.
844
6df41af2 845=item Can't localize through a reference
4727527e 846
6df41af2
GS
847(F) You said something like C<local $$ref>, which Perl can't currently
848handle, because when it goes to restore the old value of whatever $ref
be771a83 849pointed to after the scope of the local() is finished, it can't be sure
64977eb6 850that $ref will still be a reference.
4727527e 851
ea071790 852=item Can't locate %s
ec889f3a
GS
853
854(F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be
855found. Perl looks for the file in all the locations mentioned in @INC,
be771a83
GS
856unless the file name included the full path to the file. Perhaps you
857need to set the PERL5LIB or PERL5OPT environment variable to say where
858the extra library is, or maybe the script needs to add the library name
859to @INC. Or maybe you just misspelled the name of the file. See
860L<perlfunc/require> and L<lib>.
a0d0e21e 861
6df41af2
GS
862=item Can't locate auto/%s.al in @INC
863
be771a83
GS
864(F) A function (or method) was called in a package which allows
865autoload, but there is no function to autoload. Most probable causes
866are a misprint in a function/method name or a failure to C<AutoSplit>
867the file, say, by doing C<make install>.
6df41af2 868
b8170e59
JB
869=item Can't locate loadable object for module %s in @INC
870
871(F) The module you loaded is trying to load an external library, like
872for example, C<foo.so> or C<bar.dll>, but the L<DynaLoader> module was
873unable to locate this library. See L<DynaLoader>.
874
a0d0e21e
LW
875=item Can't locate object method "%s" via package "%s"
876
877(F) You called a method correctly, and it correctly indicated a package
878functioning as a class, but that package doesn't define that particular
2ba9eb46 879method, nor does any of its base classes. See L<perlobj>.
a0d0e21e
LW
880
881=item Can't locate package %s for @%s::ISA
882
be771a83
GS
883(W syntax) The @ISA array contained the name of another package that
884doesn't seem to exist.
a0d0e21e 885
2f7da168
RK
886=item Can't locate PerlIO%s
887
888(F) You tried to use in open() a PerlIO layer that does not exist,
889e.g. open(FH, ">:nosuchlayer", "somefile").
890
3e3baf6d
TB
891=item Can't make list assignment to \%ENV on this system
892
be771a83
GS
893(F) List assignment to %ENV is not supported on some systems, notably
894VMS.
3e3baf6d 895
a0d0e21e
LW
896=item Can't modify %s in %s
897
be771a83
GS
898(F) You aren't allowed to assign to the item indicated, or otherwise try
899to change it, such as with an auto-increment.
a0d0e21e 900
54310121 901=item Can't modify nonexistent substring
a0d0e21e
LW
902
903(P) The internal routine that does assignment to a substr() was handed
904a NULL.
905
6df41af2
GS
906=item Can't modify non-lvalue subroutine call
907
908(F) Subroutines meant to be used in lvalue context should be declared as
909such, see L<perlsub/"Lvalue subroutines">.
910
5f05dabc 911=item Can't msgrcv to read-only var
a0d0e21e 912
5f05dabc 913(F) The target of a msgrcv must be modifiable to be used as a receive
a0d0e21e
LW
914buffer.
915
6df41af2
GS
916=item Can't "next" outside a loop block
917
918(F) A "next" statement was executed to reiterate the current block, but
919there isn't a current block. Note that an "if" or "else" block doesn't
be771a83
GS
920count as a "loopish" block, as doesn't a block given to sort(), map() or
921grep(). You can usually double the curlies to get the same effect
922though, because the inner curlies will be considered a block that loops
923once. See L<perlfunc/next>.
6df41af2 924
a0d0e21e
LW
925=item Can't open %s: %s
926
c47ff5f1 927(S inplace) The implicit opening of a file through use of the C<< <> >>
08e9d68e
DD
928filehandle, either implicitly under the C<-n> or C<-p> command-line
929switches, or explicitly, failed for the indicated reason. Usually this
be771a83
GS
930is because you don't have read permission for a file which you named on
931the command line.
a0d0e21e 932
9a869a14
RGS
933=item Can't open a reference
934
935(W io) You tried to open a scalar reference for reading or writing,
936using the 3-arg open() syntax :
937
938 open FH, '>', $ref;
939
940but your version of perl is compiled without perlio, and this form of
941open is not supported.
942
a0d0e21e
LW
943=item Can't open bidirectional pipe
944
be771a83
GS
945(W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported.
946You can try any of several modules in the Perl library to do this, such
947as IPC::Open2. Alternately, direct the pipe's output to a file using
948">", and then read it in under a different file handle.
a0d0e21e 949
748a9306
LW
950=item Can't open error file %s as stderr
951
be771a83
GS
952(F) An error peculiar to VMS. Perl does its own command line
953redirection, and couldn't open the file specified after '2>' or '2>>' on
954the command line for writing.
748a9306
LW
955
956=item Can't open input file %s as stdin
957
be771a83
GS
958(F) An error peculiar to VMS. Perl does its own command line
959redirection, and couldn't open the file specified after '<' on the
960command line for reading.
748a9306
LW
961
962=item Can't open output file %s as stdout
963
be771a83
GS
964(F) An error peculiar to VMS. Perl does its own command line
965redirection, and couldn't open the file specified after '>' or '>>' on
966the command line for writing.
748a9306
LW
967
968=item Can't open output pipe (name: %s)
969
be771a83
GS
970(P) An error peculiar to VMS. Perl does its own command line
971redirection, and couldn't open the pipe into which to send data destined
972for stdout.
748a9306 973
2b8ca739 974=item Can't open perl script%s
a0d0e21e
LW
975
976(F) The script you specified can't be opened for the indicated reason.
977
fa3aa65a
JC
978If you're debugging a script that uses #!, and normally relies on the
979shell's $PATH search, the -S option causes perl to do that search, so
980you don't have to type the path or C<`which $scriptname`>.
981
6df41af2
GS
982=item Can't read CRTL environ
983
984(S) A warning peculiar to VMS. Perl tried to read an element of %ENV
985from the CRTL's internal environment array and discovered the array was
986missing. You need to figure out where your CRTL misplaced its environ
be771a83
GS
987or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not
988searched.
6df41af2 989
6df41af2
GS
990=item Can't "redo" outside a loop block
991
992(F) A "redo" statement was executed to restart the current block, but
993there isn't a current block. Note that an "if" or "else" block doesn't
994count as a "loopish" block, as doesn't a block given to sort(), map()
995or grep(). You can usually double the curlies to get the same effect
996though, because the inner curlies will be considered a block that
997loops once. See L<perlfunc/redo>.
998
64977eb6 999=item Can't remove %s: %s, skipping file
10f9c03d 1000
be771a83
GS
1001(S inplace) You requested an inplace edit without creating a backup
1002file. Perl was unable to remove the original file to replace it with
1003the modified file. The file was left unmodified.
10f9c03d 1004
a0d0e21e
LW
1005=item Can't rename %s to %s: %s, skipping file
1006
e476b1b5 1007(S inplace) The rename done by the B<-i> switch failed for some reason,
10f9c03d 1008probably because you don't have write permission to the directory.
a0d0e21e 1009
748a9306
LW
1010=item Can't reopen input pipe (name: %s) in binary mode
1011
be771a83
GS
1012(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried
1013to reopen it to accept binary data. Alas, it failed.
748a9306 1014
6df41af2
GS
1015=item Can't resolve method `%s' overloading `%s' in package `%s'
1016
be771a83
GS
1017(F|P) Error resolving overloading specified by a method name (as opposed
1018to a subroutine reference): no such method callable via the package. If
1019method name is C<???>, this is an internal error.
6df41af2 1020
a0d0e21e
LW
1021=item Can't reswap uid and euid
1022
be771a83
GS
1023(P) The setreuid() call failed for some reason in the setuid emulator of
1024suidperl.
a0d0e21e 1025
cd06dffe
GS
1026=item Can't return %s from lvalue subroutine
1027
be771a83
GS
1028(F) Perl detected an attempt to return illegal lvalues (such as
1029temporary or readonly values) from a subroutine used as an lvalue. This
1030is not allowed.
cd06dffe 1031
96ebfdd7
RK
1032=item Can't return outside a subroutine
1033
1034(F) The return statement was executed in mainline code, that is, where
1035there was no subroutine call to return out of. See L<perlsub>.
1036
78f9721b
SM
1037=item Can't return %s to lvalue scalar context
1038
1039(F) You tried to return a complete array or hash from an lvalue subroutine,
1040but you called the subroutine in a way that made Perl think you meant
1041to return only one value. You probably meant to write parentheses around
1042the call to the subroutine, which tell Perl that the call should be in
1043list context.
1044
a0d0e21e
LW
1045=item Can't stat script "%s"
1046
be771a83
GS
1047(P) For some reason you can't fstat() the script even though you have it
1048open already. Bizarre.
a0d0e21e
LW
1049
1050=item Can't swap uid and euid
1051
be771a83
GS
1052(P) The setreuid() call failed for some reason in the setuid emulator of
1053suidperl.
a0d0e21e
LW
1054
1055=item Can't take log of %g
1056
fb73857a
PP
1057(F) For ordinary real numbers, you can't take the logarithm of a
1058negative number or zero. There's a Math::Complex package that comes
be771a83
GS
1059standard with Perl, though, if you really want to do that for the
1060negative numbers.
a0d0e21e
LW
1061
1062=item Can't take sqrt of %g
1063
1064(F) For ordinary real numbers, you can't take the square root of a
fb73857a
PP
1065negative number. There's a Math::Complex package that comes standard
1066with Perl, though, if you really want to do that.
a0d0e21e
LW
1067
1068=item Can't undef active subroutine
1069
1070(F) You can't undefine a routine that's currently running. You can,
1071however, redefine it while it's running, and you can even undef the
1072redefined subroutine while the old routine is running. Go figure.
1073
1074=item Can't unshift
1075
1076(F) You tried to unshift an "unreal" array that can't be unshifted, such
1077as the main Perl stack.
1078
c81225bc 1079=item Can't upgrade %s (%d) to %d
a0d0e21e 1080
be771a83
GS
1081(P) The internal sv_upgrade routine adds "members" to an SV, making it
1082into a more specialized kind of SV. The top several SV types are so
1083specialized, however, that they cannot be interconverted. This message
1084indicates that such a conversion was attempted.
a0d0e21e 1085
1db89ea5
BS
1086=item Can't use anonymous symbol table for method lookup
1087
e27ad1f2 1088(F) The internal routine that does method lookup was handed a symbol
1db89ea5
BS
1089table that doesn't have a name. Symbol tables can become anonymous
1090for example by undefining stashes: C<undef %Some::Package::>.
1091
96ebfdd7
RK
1092=item Can't use an undefined value as %s reference
1093
1094(F) A value used as either a hard reference or a symbolic reference must
1095be a defined value. This helps to delurk some insidious errors.
1096
6df41af2
GS
1097=item Can't use bareword ("%s") as %s ref while "strict refs" in use
1098
be771a83
GS
1099(F) Only hard references are allowed by "strict refs". Symbolic
1100references are disallowed. See L<perlref>.
6df41af2 1101
90b75b61 1102=item Can't use %! because Errno.pm is not available
1d2dff63
GS
1103
1104(F) The first time the %! hash is used, perl automatically loads the
1105Errno.pm module. The Errno module is expected to tie the %! hash to
1106provide symbolic names for C<$!> errno values.
1107
1109a392
MHM
1108=item Can't use both '<' and '>' after type '%c' in %s
1109
1110(F) A type cannot be forced to have both big-endian and little-endian
1111byte-order at the same time, so this combination of modifiers is not
1112allowed. See L<perlfunc/pack>.
1113
6df41af2
GS
1114=item Can't use %s for loop variable
1115
be771a83
GS
1116(F) Only a simple scalar variable may be used as a loop variable on a
1117foreach.
6df41af2
GS
1118
1119=item Can't use global %s in "my"
1120
be771a83
GS
1121(F) You tried to declare a magical variable as a lexical variable. This
1122is not allowed, because the magic can be tied to only one location
1123(namely the global variable) and it would be incredibly confusing to
1124have variables in your program that looked like magical variables but
6df41af2
GS
1125weren't.
1126
6d3b25aa
RGS
1127=item Can't use '%c' in a group with different byte-order in %s
1128
1129(F) You attempted to force a different byte-order on a type
1130that is already inside a group with a byte-order modifier.
1131For example you cannot force little-endianness on a type that
1132is inside a big-endian group.
1133
c07a80fd
PP
1134=item Can't use "my %s" in sort comparison
1135
1136(F) The global variables $a and $b are reserved for sort comparisons.
c47ff5f1 1137You mentioned $a or $b in the same line as the <=> or cmp operator,
c07a80fd
PP
1138and the variable had earlier been declared as a lexical variable.
1139Either qualify the sort variable with the package name, or rename the
1140lexical variable.
1141
a0d0e21e
LW
1142=item Can't use %s ref as %s ref
1143
1144(F) You've mixed up your reference types. You have to dereference a
1145reference of the type needed. You can use the ref() function to
1146test the type of the reference, if need be.
1147
748a9306 1148=item Can't use string ("%s") as %s ref while "strict refs" in use
a0d0e21e 1149
be771a83
GS
1150(F) Only hard references are allowed by "strict refs". Symbolic
1151references are disallowed. See L<perlref>.
a0d0e21e 1152
748a9306
LW
1153=item Can't use subscript on %s
1154
1155(F) The compiler tried to interpret a bracketed expression as a
1156subscript. But to the left of the brackets was an expression that
209e7cf1 1157didn't look like a hash or array reference, or anything else subscriptable.
748a9306 1158
6df41af2
GS
1159=item Can't use \%c to mean $%c in expression
1160
75b44862
GS
1161(W syntax) In an ordinary expression, backslash is a unary operator that
1162creates a reference to its argument. The use of backslash to indicate a
1163backreference to a matched substring is valid only as part of a regular
be771a83
GS
1164expression pattern. Trying to do this in ordinary Perl code produces a
1165value that prints out looking like SCALAR(0xdecaf). Use the $1 form
1166instead.
6df41af2 1167
0d863452 1168=item Can't use "when" outside a topicalizer
dc57907a 1169
0d863452
RH
1170(F) You have used a when() block that is neither inside a C<foreach>
1171loop nor a C<given> block. (Note that this error is issued on exit
1172from the C<when> block, so you won't get the error if the match fails,
1173or if you use an explicit C<continue>.)
1174
810b8aa5
GS
1175=item Can't weaken a nonreference
1176
1177(F) You attempted to weaken something that was not a reference. Only
1178references can be weakened.
1179
5f05dabc 1180=item Can't x= to read-only value
a0d0e21e 1181
be771a83
GS
1182(F) You tried to repeat a constant value (often the undefined value)
1183with an assignment operator, which implies modifying the value itself.
a0d0e21e
LW
1184Perhaps you need to copy the value to a temporary, and repeat that.
1185
f337b084 1186=item Character in 'C' format wrapped in pack
ac7cd81a
SC
1187
1188(W pack) You said
1189
1190 pack("C", $x)
1191
1192where $x is either less than 0 or more than 255; the C<"C"> format is
1193only for encoding native operating system characters (ASCII, EBCDIC,
1194and so on) and not for Unicode characters, so Perl behaved as if you meant
1195
1196 pack("C", $x & 255)
1197
1198If you actually want to pack Unicode codepoints, use the C<"U"> format
1199instead.
1200
f337b084
TH
1201=item Character in 'W' format wrapped in pack
1202
1203(W pack) You said
1204
1205 pack("U0W", $x)
1206
1207where $x is either less than 0 or more than 255. However, C<U0>-mode expects
1208all values to fall in the interval [0, 255], so Perl behaved as if you
1209meant:
1210
1211 pack("U0W", $x & 255)
1212
1213=item Character in 'c' format wrapped in pack
ac7cd81a
SC
1214
1215(W pack) You said
1216
1217 pack("c", $x)
1218
1219where $x is either less than -128 or more than 127; the C<"c"> format
1220is only for encoding native operating system characters (ASCII, EBCDIC,
1221and so on) and not for Unicode characters, so Perl behaved as if you meant
1222
1223 pack("c", $x & 255);
1224
1225If you actually want to pack Unicode codepoints, use the C<"U"> format
1226instead.
1227
f337b084
TH
1228=item Character in '%c' format wrapped in unpack
1229
1230(W unpack) You tried something like
1231
1232 unpack("H", "\x{2a1}")
1233
1234where the format expects to process a byte (a character with a value
1235below 256), but a higher value was provided instead. Perl uses the value
1236modulus 256 instead, as if you had provided:
1237
1238 unpack("H", "\x{a1}")
1239
1240=item Character(s) in '%c' format wrapped in pack
1241
1242(W pack) You tried something like
1243
1244 pack("u", "\x{1f3}b")
1245
1246where the format expects to process a sequence of bytes (character with a
1247value below 256), but some of the characters had a higher value. Perl
1248uses the character values modulus 256 instead, as if you had provided:
1249
1250 pack("u", "\x{f3}b")
1251
1252=item Character(s) in '%c' format wrapped in unpack
1253
1254(W unpack) You tried something like
1255
1256 unpack("s", "\x{1f3}b")
1257
1258where the format expects to process a sequence of bytes (character with a
1259value below 256), but some of the characters had a higher value. Perl
1260uses the character values modulus 256 instead, as if you had provided:
1261
1262 unpack("s", "\x{f3}b")
1263
96ebfdd7
RK
1264=item close() on unopened filehandle %s
1265
1266(W unopened) You tried to close a filehandle that was never opened.
1267
abc7ecad
SP
1268=item closedir() attempted on invalid dirhandle %s
1269
1270(W io) The dirhandle you tried to close is either closed or not really
1271a dirhandle. Check your control flow.
1272
49704364
LW
1273=item Code missing after '/'
1274
1275(F) You had a (sub-)template that ends with a '/'. There must be another
1276template code following the slash. See L<perlfunc/pack>.
1277
6df41af2
GS
1278=item %s: Command not found
1279
be771a83
GS
1280(A) You've accidentally run your script through B<csh> instead of Perl.
1281Check the #! line, or manually feed your script into Perl yourself.
6df41af2 1282
7a2e2cd6
PP
1283=item Compilation failed in require
1284
1285(F) Perl could not compile a file specified in a C<require> statement.
be771a83
GS
1286Perl uses this generic message when none of the errors that it
1287encountered were severe enough to halt compilation immediately.
7a2e2cd6 1288
c3464db5
DD
1289=item Complex regular subexpression recursion limit (%d) exceeded
1290
be771a83
GS
1291(W regexp) The regular expression engine uses recursion in complex
1292situations where back-tracking is required. Recursion depth is limited
1293to 32766, or perhaps less in architectures where the stack cannot grow
1294arbitrarily. ("Simple" and "medium" situations are handled without
1295recursion and are not subject to a limit.) Try shortening the string
1296under examination; looping in Perl code (e.g. with C<while>) rather than
1297in the regular expression engine; or rewriting the regular expression so
c2e66d9e 1298that it is simpler or backtracks less. (See L<perlfaq2> for information
be771a83 1299on I<Mastering Regular Expressions>.)
c3464db5 1300
38875929
DM
1301=item cond_broadcast() called on unlocked variable
1302
1303(W threads) Within a thread-enabled program, you tried to call
1304cond_broadcast() on a variable which wasn't locked. The cond_broadcast()
1305function is used to wake up another thread that is waiting in a
1306cond_wait(). To ensure that the signal isn't sent before the other thread
1307has a chance to enter the wait, it is usual for the signaling thread to
1308first wait for a lock on variable. This lock attempt will only succeed
1309after the other thread has entered cond_wait() and thus relinquished the
1310lock.
1311
38875929
DM
1312=item cond_signal() called on unlocked variable
1313
1314(W threads) Within a thread-enabled program, you tried to call
1315cond_signal() on a variable which wasn't locked. The cond_signal()
1316function is used to wake up another thread that is waiting in a
1317cond_wait(). To ensure that the signal isn't sent before the other thread
1318has a chance to enter the wait, it is usual for the signaling thread to
1319first wait for a lock on variable. This lock attempt will only succeed
1320after the other thread has entered cond_wait() and thus relinquished the
1321lock.
1322
69282e91 1323=item connect() on closed socket %s
a0d0e21e 1324
be771a83
GS
1325(W closed) You tried to do a connect on a closed socket. Did you forget
1326to check the return value of your socket() call? See
1327L<perlfunc/connect>.
a0d0e21e 1328
41ab332f 1329=item Constant(%s)%s: %s
6df41af2 1330
be771a83
GS
1331(F) The parser found inconsistencies either while attempting to define
1332an overloaded constant, or when trying to find the character name
1333specified in the C<\N{...}> escape. Perhaps you forgot to load the
1334corresponding C<overload> or C<charnames> pragma? See L<charnames> and
1335L<overload>.
6df41af2 1336
fc8cd66c
YO
1337=item Constant(%s)%s: %s in regex; marked by <-- HERE in m/%s/
1338
1339(F) The parser found inconsistencies while attempting to find
1340the character name specified in the C<\N{...}> escape. Perhaps you
1341forgot to load the corresponding C<charnames> pragma?
1342See L<charnames>.
1343
1344
779c5bc9
GS
1345=item Constant is not %s reference
1346
1347(F) A constant value (perhaps declared using the C<use constant> pragma)
be771a83
GS
1348is being dereferenced, but it amounts to the wrong type of reference.
1349The message indicates the type of reference that was expected. This
1350usually indicates a syntax error in dereferencing the constant value.
779c5bc9
GS
1351See L<perlsub/"Constant Functions"> and L<constant>.
1352
4cee8e80
CS
1353=item Constant subroutine %s redefined
1354
bb028877 1355(S) You redefined a subroutine which had previously been
be771a83
GS
1356eligible for inlining. See L<perlsub/"Constant Functions"> for
1357commentary and workarounds.
4cee8e80 1358
9607fc9c
PP
1359=item Constant subroutine %s undefined
1360
be771a83
GS
1361(W misc) You undefined a subroutine which had previously been eligible
1362for inlining. See L<perlsub/"Constant Functions"> for commentary and
1363workarounds.
9607fc9c 1364
e7ea3e70
IZ
1365=item Copy method did not return a reference
1366
64977eb6 1367(F) The method which overloads "=" is buggy. See
13a2d996 1368L<overload/Copy Constructor>.
e7ea3e70 1369
6798c92b
GS
1370=item CORE::%s is not a keyword
1371
1372(F) The CORE:: namespace is reserved for Perl keywords.
1373
a0d0e21e
LW
1374=item corrupted regexp pointers
1375
1376(P) The regular expression engine got confused by what the regular
1377expression compiler gave it.
1378
1379=item corrupted regexp program
1380
be771a83
GS
1381(P) The regular expression engine got passed a regexp program without a
1382valid magic number.
a0d0e21e 1383
6df41af2
GS
1384=item Corrupt malloc ptr 0x%lx at 0x%lx
1385
1386(P) The malloc package that comes with Perl had an internal failure.
1387
49704364
LW
1388=item Count after length/code in unpack
1389
1390(F) You had an unpack template indicating a counted-length string, but
1391you have also specified an explicit size for the string. See
1392L<perlfunc/pack>.
1393
a0d0e21e
LW
1394=item Deep recursion on subroutine "%s"
1395
be771a83
GS
1396(W recursion) This subroutine has called itself (directly or indirectly)
1397100 times more than it has returned. This probably indicates an
1398infinite recursion, unless you're writing strange benchmark programs, in
1399which case it indicates something else.
a0d0e21e 1400
f10b0346 1401=item defined(@array) is deprecated
69794302 1402
be771a83
GS
1403(D deprecated) defined() is not usually useful on arrays because it
1404checks for an undefined I<scalar> value. If you want to see if the
64977eb6 1405array is empty, just use C<if (@array) { # not empty }> for example.
69794302 1406
f10b0346 1407=item defined(%hash) is deprecated
69794302 1408
be771a83
GS
1409(D deprecated) defined() is not usually useful on hashes because it
1410checks for an undefined I<scalar> value. If you want to see if the hash
64977eb6 1411is empty, just use C<if (%hash) { # not empty }> for example.
69794302 1412
62658f4d
PM
1413=item %s defines neither package nor VERSION--version check failed
1414
1415(F) You said something like "use Module 42" but in the Module file
1416there are neither package declarations nor a C<$VERSION>.
1417
fc36a67e
PP
1418=item Delimiter for here document is too long
1419
be771a83
GS
1420(F) In a here document construct like C<<<FOO>, the label C<FOO> is too
1421long for Perl to handle. You have to be seriously twisted to write code
1422that triggers this error.
fc36a67e 1423
6d3b25aa
RGS
1424=item Deprecated use of my() in false conditional
1425
1426(D deprecated) You used a declaration similar to C<my $x if 0>.
1427There has been a long-standing bug in Perl that causes a lexical variable
1428not to be cleared at scope exit when its declaration includes a false
1429conditional. Some people have exploited this bug to achieve a kind of
1430static variable. Since we intend to fix this bug, we don't want people
1431relying on this behavior. You can achieve a similar static effect by
1432declaring the variable in a separate block outside the function, eg
36fb85f3 1433
6d3b25aa
RGS
1434 sub f { my $x if 0; return $x++ }
1435
1436becomes
1437
1438 { my $x; sub f { return $x++ } }
1439
36fb85f3
RGS
1440Beginning with perl 5.9.4, you can also use C<state> variables to
1441have lexicals that are initialized only once (see L<feature>):
1442
1443 sub f { state $x; return $x++ }
1444
500ab966
RGS
1445=item DESTROY created new reference to dead object '%s'
1446
1447(F) A DESTROY() method created a new reference to the object which is
1448just being DESTROYed. Perl is confused, and prefers to abort rather than
1449to create a dangling reference.
1450
3cdd684c
TP
1451=item Did not produce a valid header
1452
1453See Server error.
1454
6df41af2
GS
1455=item %s did not return a true value
1456
1457(F) A required (or used) file must return a true value to indicate that
1458it compiled correctly and ran its initialization code correctly. It's
1459traditional to end such a file with a "1;", though any true value would
1460do. See L<perlfunc/require>.
1461
cc507455 1462=item (Did you mean &%s instead?)
4633a7c4 1463
be771a83
GS
1464(W) You probably referred to an imported subroutine &FOO as $FOO or some
1465such.
4633a7c4 1466
cc507455 1467=item (Did you mean "local" instead of "our"?)
33633739 1468
be771a83
GS
1469(W misc) Remember that "our" does not localize the declared global
1470variable. You have declared it again in the same lexical scope, which
1471seems superfluous.
33633739 1472
cc507455 1473=item (Did you mean $ or @ instead of %?)
a0d0e21e 1474
be771a83
GS
1475(W) You probably said %hash{$key} when you meant $hash{$key} or
1476@hash{@keys}. On the other hand, maybe you just meant %hash and got
1477carried away.
748a9306 1478
7e1af8bc 1479=item Died
5f05dabc
PP
1480
1481(F) You passed die() an empty string (the equivalent of C<die "">) or
1482you called it with no args and both C<$@> and C<$_> were empty.
1483
3cdd684c
TP
1484=item Document contains no data
1485
1486See Server error.
1487
62658f4d
PM
1488=item %s does not define %s::VERSION--version check failed
1489
1490(F) You said something like "use Module 42" but the Module did not
1491define a C<$VERSION.>
1492
49704364
LW
1493=item '/' does not take a repeat count
1494
1495(F) You cannot put a repeat count of any kind right after the '/' code.
1496See L<perlfunc/pack>.
1497
a0d0e21e
LW
1498=item Don't know how to handle magic of type '%s'
1499
1500(P) The internal handling of magical variables has been cursed.
1501
1502=item do_study: out of memory
1503
1504(P) This should have been caught by safemalloc() instead.
1505
6df41af2
GS
1506=item (Do you need to predeclare %s?)
1507
56da5a46
RGS
1508(S syntax) This is an educated guess made in conjunction with the message
1509"%s found where operator expected". It often means a subroutine or module
6df41af2
GS
1510name is being referenced that hasn't been declared yet. This may be
1511because of ordering problems in your file, or because of a missing
be771a83
GS
1512"sub", "package", "require", or "use" statement. If you're referencing
1513something that isn't defined yet, you don't actually have to define the
1514subroutine or package before the current location. You can use an empty
1515"sub foo;" or "package FOO;" to enter a "forward" declaration.
6df41af2 1516
ac206dc8
RGS
1517=item dump() better written as CORE::dump()
1518
1519(W misc) You used the obsolescent C<dump()> built-in function, without fully
1520qualifying it as C<CORE::dump()>. Maybe it's a typo. See L<perlfunc/dump>.
1521
84d78eb7
YO
1522=item dump is not supported
1523
1524(F) Your machine doesn't support dump/undump.
1525
a0d0e21e
LW
1526=item Duplicate free() ignored
1527
be771a83
GS
1528(S malloc) An internal routine called free() on something that had
1529already been freed.
a0d0e21e 1530
1109a392
MHM
1531=item Duplicate modifier '%c' after '%c' in %s
1532
1533(W) You have applied the same modifier more than once after a type
1534in a pack template. See L<perlfunc/pack>.
1535
4633a7c4
LW
1536=item elseif should be elsif
1537
56da5a46
RGS
1538(S syntax) There is no keyword "elseif" in Perl because Larry thinks it's
1539ugly. Your code will be interpreted as an attempt to call a method named
be771a83 1540"elseif" for the class returned by the following block. This is
4633a7c4
LW
1541unlikely to be what you want.
1542
ab13f0c7
JH
1543=item Empty %s
1544
af6f566e
HS
1545(F) C<\p> and C<\P> are used to introduce a named Unicode property, as
1546described in L<perlunicode> and L<perlre>. You used C<\p> or C<\P> in
1547a regular expression without specifying the property name.
ab13f0c7 1548
85ab1d1d 1549=item entering effective %s failed
5ff3f7a4 1550
85ab1d1d 1551(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1552effective uids or gids failed.
1553
c038024b
RGS
1554=item %ENV is aliased to %s
1555
1556(F) You're running under taint mode, and the C<%ENV> variable has been
1557aliased to another hash, so it doesn't reflect anymore the state of the
1558program's environment. This is potentially insecure.
1559
748a9306
LW
1560=item Error converting file specification %s
1561
5f05dabc 1562(F) An error peculiar to VMS. Because Perl may have to deal with file
748a9306 1563specifications in either VMS or Unix syntax, it converts them to a
be771a83
GS
1564single form when it must operate on them directly. Either you've passed
1565an invalid file specification to Perl, or you've found a case the
1566conversion routines don't handle. Drat.
748a9306 1567
e4d48cc9
GS
1568=item %s: Eval-group in insecure regular expression
1569
be771a83
GS
1570(F) Perl detected tainted data when trying to compile a regular
1571expression that contains the C<(?{ ... })> zero-width assertion, which
1572is unsafe. See L<perlre/(?{ code })>, and L<perlsec>.
e4d48cc9 1573
e4d48cc9
GS
1574=item %s: Eval-group not allowed at run time
1575
be771a83
GS
1576(F) Perl tried to compile a regular expression containing the
1577C<(?{ ... })> zero-width assertion at run time, as it would when the
1578pattern contains interpolated values. Since that is a security risk, it
1579is not allowed. If you insist, you may still do this by explicitly
1580building the pattern from an interpolated string at run time and using
1581that in an eval(). See L<perlre/(?{ code })>.
e4d48cc9 1582
6df41af2
GS
1583=item %s: Eval-group not allowed, use re 'eval'
1584
be771a83
GS
1585(F) A regular expression contained the C<(?{ ... })> zero-width
1586assertion, but that construct is only allowed when the C<use re 'eval'>
1587pragma is in effect. See L<perlre/(?{ code })>.
6df41af2 1588
fc36a67e
PP
1589=item Excessively long <> operator
1590
1591(F) The contents of a <> operator may not exceed the maximum size of a
1592Perl identifier. If you're just trying to glob a long list of
1593filenames, try using the glob() operator, or put the filenames into a
1594variable and glob that.
1595
ed9aa3b7
SG
1596=item exec? I'm not *that* kind of operating system
1597
1598(F) The C<exec> function is not implemented in MacPerl. See L<perlport>.
1599
f86702cc 1600=item Execution of %s aborted due to compilation errors
a0d0e21e
LW
1601
1602(F) The final summary message when a Perl compilation fails.
1603
1604=item Exiting eval via %s
1605
be771a83
GS
1606(W exiting) You are exiting an eval by unconventional means, such as a
1607goto, or a loop control statement.
e476b1b5
GS
1608
1609=item Exiting format via %s
1610
9a2ff54b 1611(W exiting) You are exiting a format by unconventional means, such as a
be771a83 1612goto, or a loop control statement.
a0d0e21e 1613
0a753a76
PP
1614=item Exiting pseudo-block via %s
1615
be771a83
GS
1616(W exiting) You are exiting a rather special block construct (like a
1617sort block or subroutine) by unconventional means, such as a goto, or a
1618loop control statement. See L<perlfunc/sort>.
0a753a76 1619
a0d0e21e
LW
1620=item Exiting subroutine via %s
1621
be771a83
GS
1622(W exiting) You are exiting a subroutine by unconventional means, such
1623as a goto, or a loop control statement.
a0d0e21e
LW
1624
1625=item Exiting substitution via %s
1626
be771a83
GS
1627(W exiting) You are exiting a substitution by unconventional means, such
1628as a return, a goto, or a loop control statement.
a0d0e21e 1629
7b8d334a
GS
1630=item Explicit blessing to '' (assuming package main)
1631
be771a83
GS
1632(W misc) You are blessing a reference to a zero length string. This has
1633the effect of blessing the reference into the package main. This is
1634usually not what you want. Consider providing a default target package,
1635e.g. bless($ref, $p || 'MyPackage');
7b8d334a 1636
6df41af2
GS
1637=item %s: Expression syntax
1638
be771a83
GS
1639(A) You've accidentally run your script through B<csh> instead of Perl.
1640Check the #! line, or manually feed your script into Perl yourself.
6df41af2
GS
1641
1642=item %s failed--call queue aborted
1643
1644(F) An untrapped exception was raised while executing a CHECK, INIT, or
1645END subroutine. Processing of the remainder of the queue of such
1646routines has been prematurely ended.
1647
7253e4e3 1648=item False [] range "%s" in regex; marked by <-- HERE in m/%s/
73b437c8 1649
be771a83 1650(W regexp) A character class range must start and end at a literal
7253e4e3
RK
1651character, not another character class like C<\d> or C<[:alpha:]>. The "-"
1652in your false range is interpreted as a literal "-". Consider quoting the
1653"-", "\-". The <-- HERE shows in the regular expression about where the
1654problem was discovered. See L<perlre>.
73b437c8 1655
748a9306 1656=item Fatal VMS error at %s, line %d
a0d0e21e 1657
be771a83
GS
1658(P) An error peculiar to VMS. Something untoward happened in a VMS
1659system service or RTL routine; Perl's exit status should provide more
1660details. The filename in "at %s" and the line number in "line %d" tell
1661you which section of the Perl source code is distressed.
a0d0e21e
LW
1662
1663=item fcntl is not implemented
1664
1665(F) Your machine apparently doesn't implement fcntl(). What is this, a
1666PDP-11 or something?
1667
f337b084
TH
1668=item Field too wide in 'u' format in pack
1669
1670(W pack) Each line in an uuencoded string start with a length indicator
1671which can't encode values above 63. So there is no point in asking for
1672a line length bigger than that. Perl will behave as if you specified
1673C<u63> as format.
1674
af8c498a 1675=item Filehandle %s opened only for input
a0d0e21e 1676
6c8d78fb
HS
1677(W io) You tried to write on a read-only filehandle. If you intended
1678it to be a read-write filehandle, you needed to open it with "+<" or
1679"+>" or "+>>" instead of with "<" or nothing. If you intended only to
1680write the file, use ">" or ">>". See L<perlfunc/open>.
a0d0e21e 1681
af8c498a 1682=item Filehandle %s opened only for output
a0d0e21e 1683
6c8d78fb
HS
1684(W io) You tried to read from a filehandle opened only for writing, If
1685you intended it to be a read/write filehandle, you needed to open it
be771a83
GS
1686with "+<" or "+>" or "+>>" instead of with "<" or nothing. If you
1687intended only to read from the file, use "<". See L<perlfunc/open>.
6c8d78fb
HS
1688Another possibility is that you attempted to open filedescriptor 0
1689(also known as STDIN) for output (maybe you closed STDIN earlier?).
97828cef
RGS
1690
1691=item Filehandle %s reopened as %s only for input
1692
1693(W io) You opened for reading a filehandle that got the same filehandle id
d7f8936a 1694as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR
97828cef
RGS
1695previously.
1696
1697=item Filehandle STDIN reopened as %s only for output
1698
1699(W io) You opened for writing a filehandle that got the same filehandle id
d7f8936a 1700as STDIN. This occurred because you closed STDIN previously.
a0d0e21e
LW
1701
1702=item Final $ should be \$ or $name
1703
1704(F) You must now decide whether the final $ in a string was meant to be
be771a83
GS
1705a literal dollar sign, or was meant to introduce a variable name that
1706happens to be missing. So you have to put either the backslash or the
1707name.
a0d0e21e 1708
56e90b21
GS
1709=item flock() on closed filehandle %s
1710
be771a83 1711(W closed) The filehandle you're attempting to flock() got itself closed
c289d2f7 1712some time before now. Check your control flow. flock() operates on
be771a83
GS
1713filehandles. Are you attempting to call flock() on a dirhandle by the
1714same name?
56e90b21 1715
6df41af2
GS
1716=item Format not terminated
1717
1718(F) A format must be terminated by a line with a solitary dot. Perl got
1719to the end of your file without finding such a line.
1720
a0d0e21e
LW
1721=item Format %s redefined
1722
e476b1b5 1723(W redefine) You redefined a format. To suppress this warning, say
a0d0e21e
LW
1724
1725 {
271595cc 1726 no warnings 'redefine';
a0d0e21e
LW
1727 eval "format NAME =...";
1728 }
1729
a0d0e21e
LW
1730=item Found = in conditional, should be ==
1731
e476b1b5 1732(W syntax) You said
a0d0e21e
LW
1733
1734 if ($foo = 123)
1735
1736when you meant
1737
1738 if ($foo == 123)
1739
1740(or something like that).
1741
6df41af2
GS
1742=item %s found where operator expected
1743
56da5a46
RGS
1744(S syntax) The Perl lexer knows whether to expect a term or an operator.
1745If it sees what it knows to be a term when it was expecting to see an
be771a83
GS
1746operator, it gives you this warning. Usually it indicates that an
1747operator or delimiter was omitted, such as a semicolon.
6df41af2 1748
a0d0e21e
LW
1749=item gdbm store returned %d, errno %d, key "%s"
1750
1751(S) A warning from the GDBM_File extension that a store failed.
1752
1753=item gethostent not implemented
1754
1755(F) Your C library apparently doesn't implement gethostent(), probably
1756because if it did, it'd feel morally obligated to return every hostname
1757on the Internet.
1758
69282e91 1759=item get%sname() on closed socket %s
a0d0e21e 1760
be771a83
GS
1761(W closed) You tried to get a socket or peer socket name on a closed
1762socket. Did you forget to check the return value of your socket() call?
a0d0e21e 1763
748a9306
LW
1764=item getpwnam returned invalid UIC %#o for user "%s"
1765
1766(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
1767C<getpwnam> operator returned an invalid UIC.
1768
6df41af2
GS
1769=item getsockopt() on closed socket %s
1770
be771a83
GS
1771(W closed) You tried to get a socket option on a closed socket. Did you
1772forget to check the return value of your socket() call? See
6df41af2
GS
1773L<perlfunc/getsockopt>.
1774
1775=item Global symbol "%s" requires explicit package name
1776
1777(F) You've said "use strict vars", which indicates that all variables
1778must either be lexically scoped (using "my"), declared beforehand using
1779"our", or explicitly qualified to say which package the global variable
1780is in (using "::").
1781
e476b1b5
GS
1782=item glob failed (%s)
1783
be771a83
GS
1784(W glob) Something went wrong with the external program(s) used for
1785C<glob> and C<< <*.c> >>. Usually, this means that you supplied a
1786C<glob> pattern that caused the external program to fail and exit with a
1787nonzero status. If the message indicates that the abnormal exit
1788resulted in a coredump, this may also mean that your csh (C shell) is
1789broken. If so, you should change all of the csh-related variables in
1790config.sh: If you have tcsh, make the variables refer to it as if it
1791were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all
1792empty (except that C<d_csh> should be C<'undef'>) so that Perl will
1793think csh is missing. In either case, after editing config.sh, run
75b44862 1794C<./Configure -S> and rebuild Perl.
e476b1b5 1795
a0d0e21e
LW
1796=item Glob not terminated
1797
1798(F) The lexer saw a left angle bracket in a place where it was expecting
be771a83
GS
1799a term, so it's looking for the corresponding right angle bracket, and
1800not finding it. Chances are you left some needed parentheses out
1801earlier in the line, and you really meant a "less than".
a0d0e21e 1802
6df41af2 1803=item Got an error from DosAllocMem
a0d0e21e 1804
6df41af2
GS
1805(P) An error peculiar to OS/2. Most probably you're using an obsolete
1806version of Perl, and this should not happen anyway.
a0d0e21e
LW
1807
1808=item goto must have label
1809
1810(F) Unlike with "next" or "last", you're not allowed to goto an
1811unspecified destination. See L<perlfunc/goto>.
1812
49704364 1813=item ()-group starts with a count
18529408 1814
49704364 1815(F) A ()-group started with a count. A count is
18529408 1816supposed to follow something: a template character or a ()-group.
49704364 1817 See L<perlfunc/pack>.
18529408 1818
6df41af2
GS
1819=item %s had compilation errors
1820
1821(F) The final summary message when a C<perl -c> fails.
1822
a0d0e21e
LW
1823=item Had to create %s unexpectedly
1824
be771a83
GS
1825(S internal) A routine asked for a symbol from a symbol table that ought
1826to have existed already, but for some reason it didn't, and had to be
1827created on an emergency basis to prevent a core dump.
a0d0e21e
LW
1828
1829=item Hash %%s missing the % in argument %d of %s()
1830
be771a83
GS
1831(D deprecated) Really old Perl let you omit the % on hash names in some
1832spots. This is now heavily deprecated.
a0d0e21e 1833
6df41af2
GS
1834=item %s has too many errors
1835
1836(F) The parser has given up trying to parse the program after 10 errors.
1837Further error messages would likely be uninformative.
1838
252aa082
JH
1839=item Hexadecimal number > 0xffffffff non-portable
1840
e476b1b5 1841(W portable) The hexadecimal number you specified is larger than 2**32-1
9e24b6e2
JH
1842(4294967295) and therefore non-portable between systems. See
1843L<perlport> for more on portability concerns.
252aa082 1844
8903cb82
PP
1845=item Identifier too long
1846
1847(F) Perl limits identifiers (names for variables, functions, etc.) to
fc36a67e 1848about 250 characters for simple names, and somewhat more for compound
be771a83
GS
1849names (like C<$A::B>). You've exceeded Perl's limits. Future versions
1850of Perl are likely to eliminate these arbitrary limitations.
8903cb82 1851
fc8cd66c
YO
1852=item Ignoring %s in character class in regex; marked by <-- HERE in m/%s/
1853
1854(W) Named unicode character escapes (\N{...}) may return multi-char
1855or zero length sequences. When such an escape is used in a character class
1856its behaviour is not well defined. Check that the correct escape has
1857been used, and the correct charname handler is in scope.
1858
6df41af2 1859=item Illegal binary digit %s
f675dbe5 1860
6df41af2 1861(F) You used a digit other than 0 or 1 in a binary number.
f675dbe5 1862
6df41af2 1863=item Illegal binary digit %s ignored
a0d0e21e 1864
be771a83
GS
1865(W digit) You may have tried to use a digit other than 0 or 1 in a
1866binary number. Interpretation of the binary number stopped before the
1867offending digit.
a0d0e21e 1868
4fdae800
PP
1869=item Illegal character %s (carriage return)
1870
d5898338 1871(F) Perl normally treats carriage returns in the program text as it
be771a83
GS
1872would any other whitespace, which means you should never see this error
1873when Perl was built using standard options. For some reason, your
1874version of Perl appears to have been built without this support. Talk
1875to your Perl administrator.
4fdae800 1876
d37a9538
ST
1877=item Illegal character in prototype for %s : %s
1878
420cdfc1 1879(W syntax) An illegal character was found in a prototype declaration. Legal
d37a9538
ST
1880characters in prototypes are $, @, %, *, ;, [, ], &, and \.
1881
904d85c5
RGS
1882=item Illegal declaration of anonymous subroutine
1883
1884(F) When using the C<sub> keyword to construct an anonymous subroutine,
1885you must always specify a block of code. See L<perlsub>.
1886
8e742a20
MHM
1887=item Illegal declaration of subroutine %s
1888
1889(F) A subroutine was not declared correctly. See L<perlsub>.
1890
a0d0e21e
LW
1891=item Illegal division by zero
1892
be771a83
GS
1893(F) You tried to divide a number by 0. Either something was wrong in
1894your logic, or you need to put a conditional in to guard against
1895meaningless input.
a0d0e21e 1896
6df41af2
GS
1897=item Illegal hexadecimal digit %s ignored
1898
be771a83
GS
1899(W digit) You may have tried to use a character other than 0 - 9 or
1900A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal
1901number stopped before the illegal character.
6df41af2 1902
a0d0e21e
LW
1903=item Illegal modulus zero
1904
be771a83
GS
1905(F) You tried to divide a number by 0 to get the remainder. Most
1906numbers don't take to this kindly.
a0d0e21e 1907
6df41af2 1908=item Illegal number of bits in vec
399388f4 1909
6df41af2
GS
1910(F) The number of bits in vec() (the third argument) must be a power of
1911two from 1 to 32 (or 64, if your platform supports that).
399388f4
GS
1912
1913=item Illegal octal digit %s
a0d0e21e 1914
d1be9408 1915(F) You used an 8 or 9 in an octal number.
a0d0e21e 1916
399388f4 1917=item Illegal octal digit %s ignored
748a9306 1918
d1be9408 1919(W digit) You may have tried to use an 8 or 9 in an octal number.
75b44862 1920Interpretation of the octal number stopped before the 8 or 9.
748a9306 1921
6df41af2 1922=item Illegal switch in PERL5OPT: %s
6ff81951 1923
6df41af2 1924(X) The PERL5OPT environment variable may only be used to set the
e4af53b0 1925following switches: B<-[CDIMUdmtwA]>.
6ff81951 1926
6df41af2 1927=item Ill-formed CRTL environ value "%s"
81e118e0 1928
75b44862 1929(W internal) A warning peculiar to VMS. Perl tried to read the CRTL's
be771a83
GS
1930internal environ array, and encountered an element without the C<=>
1931delimiter used to separate keys from values. The element is ignored.
09bef843 1932
6df41af2 1933=item Ill-formed message in prime_env_iter: |%s|
54310121 1934
be771a83
GS
1935(W internal) A warning peculiar to VMS. Perl tried to read a logical
1936name or CLI symbol definition when preparing to iterate over %ENV, and
1937didn't see the expected delimiter between key and value, so the line was
1938ignored.
54310121 1939
8fa7688f
SF
1940=item Impossible to activate assertion call
1941
1942(W assertions) You're calling an assertion function in a block that is
1943not under the control of the C<assertions> pragma.
1944
6df41af2 1945=item (in cleanup) %s
9607fc9c 1946
be771a83
GS
1947(W misc) This prefix usually indicates that a DESTROY() method raised
1948the indicated exception. Since destructors are usually called by the
1949system at arbitrary points during execution, and often a vast number of
1950times, the warning is issued only once for any number of failures that
1951would otherwise result in the same message being repeated.
6df41af2 1952
be771a83
GS
1953Failure of user callbacks dispatched using the C<G_KEEPERR> flag could
1954also result in this warning. See L<perlcall/G_KEEPERR>.
9607fc9c 1955
979699d9
JH
1956=item In EBCDIC the v-string components cannot exceed 2147483647
1957
1958(F) An error peculiar to EBCDIC. Internally, v-strings are stored as
1959Unicode code points, and encoded in EBCDIC as UTF-EBCDIC. The UTF-EBCDIC
1960encoding is limited to code points no larger than 2147483647 (0x7FFFFFFF).
1961
a0d0e21e
LW
1962=item Insecure dependency in %s
1963
8b1a09fc 1964(F) You tried to do something that the tainting mechanism didn't like.
be771a83
GS
1965The tainting mechanism is turned on when you're running setuid or
1966setgid, or when you specify B<-T> to turn it on explicitly. The
1967tainting mechanism labels all data that's derived directly or indirectly
1968from the user, who is considered to be unworthy of your trust. If any
1969such data is used in a "dangerous" operation, you get this error. See
1970L<perlsec> for more information.
a0d0e21e
LW
1971
1972=item Insecure directory in %s
1973
be771a83
GS
1974(F) You can't use system(), exec(), or a piped open in a setuid or
1975setgid script if C<$ENV{PATH}> contains a directory that is writable by
df98f984
RGS
1976the world. Also, the PATH must not contain any relative directory.
1977See L<perlsec>.
a0d0e21e 1978
62f468fc 1979=item Insecure $ENV{%s} while running %s
a0d0e21e
LW
1980
1981(F) You can't use system(), exec(), or a piped open in a setuid or
62f468fc 1982setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
332d5f78
SR
1983C<$ENV{ENV}>, C<$ENV{BASH_ENV}> or C<$ENV{TERM}> are derived from data
1984supplied (or potentially supplied) by the user. The script must set
1985the path to a known value, using trustworthy data. See L<perlsec>.
a0d0e21e 1986
a7ae9550
GS
1987=item Integer overflow in %s number
1988
75b44862 1989(W overflow) The hexadecimal, octal or binary number you have specified
be771a83
GS
1990either as a literal or as an argument to hex() or oct() is too big for
1991your architecture, and has been converted to a floating point number.
1992On a 32-bit architecture the largest hexadecimal, octal or binary number
9e24b6e2
JH
1993representable without overflow is 0xFFFFFFFF, 037777777777, or
19940b11111111111111111111111111111111 respectively. Note that Perl
1995transparently promotes all numbers to a floating point representation
1996internally--subject to loss of precision errors in subsequent
1997operations.
bbce6d69 1998
2fba7546
GA
1999=item Integer overflow in format string for %s
2000
0be96356
AL
2001(F) The indexes and widths specified in the format string of C<printf()>
2002or C<sprintf()> are too large. The numbers must not overflow the size of
2fba7546
GA
2003integers for your architecture.
2004
46314c13
JP
2005=item Integer overflow in version
2006
2007(F) Some portion of a version initialization is too large for the
2008size of integers for your architecture. This is not a warning
2009because there is no rational reason for a version to try and use a
2010element larger than typically 2**32. This is usually caused by
2011trying to use some odd mathematical operation as a version, like
2012100/9.
2013
7253e4e3 2014=item Internal disaster in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2015
2016(P) Something went badly wrong in the regular expression parser.
7253e4e3 2017The <-- HERE shows in the regular expression about where the problem was
b45f050a
JF
2018discovered.
2019
748a9306
LW
2020=item Internal inconsistency in tracking vforks
2021
be771a83
GS
2022(S) A warning peculiar to VMS. Perl keeps track of the number of times
2023you've called C<fork> and C<exec>, to determine whether the current call
2024to C<exec> should affect the current script or a subprocess (see
2025L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so
2026Perl is making a guess and treating this C<exec> as a request to
2027terminate the Perl script and execute the specified command.
748a9306 2028
7253e4e3 2029=item Internal urp in regex; marked by <-- HERE in m/%s/
b45f050a 2030
7253e4e3
RK
2031(P) Something went badly awry in the regular expression parser. The
2032<-- HERE shows in the regular expression about where the problem was
2033discovered.
a0d0e21e 2034
6df41af2
GS
2035=item %s (...) interpreted as function
2036
75b44862 2037(W syntax) You've run afoul of the rule that says that any list operator
be771a83 2038followed by parentheses turns into a function, with all the list
64977eb6 2039operators arguments found inside the parentheses. See
13a2d996 2040L<perlop/Terms and List Operators (Leftward)>.
6df41af2 2041
09bef843
SB
2042=item Invalid %s attribute: %s
2043
2044The indicated attribute for a subroutine or variable was not recognized
2045by Perl or by a user-supplied handler. See L<attributes>.
2046
2047=item Invalid %s attributes: %s
2048
be771a83
GS
2049The indicated attributes for a subroutine or variable were not
2050recognized by Perl or by a user-supplied handler. See L<attributes>.
09bef843 2051
c635e13b
PP
2052=item Invalid conversion in %s: "%s"
2053
be771a83
GS
2054(W printf) Perl does not understand the given format conversion. See
2055L<perlfunc/sprintf>.
c635e13b 2056
7253e4e3 2057=item Invalid [] range "%s" in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2058
2059(F) The range specified in a character class had a minimum character
7253e4e3
RK
2060greater than the maximum character. One possibility is that you forgot the
2061C<{}> from your ending C<\x{}> - C<\x> without the curly braces can go only
2062up to C<ff>. The <-- HERE shows in the regular expression about where the
2063problem was discovered. See L<perlre>.
6df41af2 2064
d1573ac7 2065=item Invalid range "%s" in transliteration operator
c2e66d9e
GS
2066
2067(F) The range specified in the tr/// or y/// operator had a minimum
2068character greater than the maximum character. See L<perlop>.
2069
09bef843
SB
2070=item Invalid separator character %s in attribute list
2071
0120eecf 2072(F) Something other than a colon or whitespace was seen between the
be771a83
GS
2073elements of an attribute list. If the previous attribute had a
2074parenthesised parameter list, perhaps that list was terminated too soon.
2075See L<attributes>.
09bef843 2076
b4581f09
JH
2077=item Invalid separator character %s in PerlIO layer specification %s
2078
2079(W layer) When pushing layers onto the Perl I/O system, something other than a
2080colon or whitespace was seen between the elements of a layer list.
2081If the previous attribute had a parenthesised parameter list, perhaps that
2082list was terminated too soon.
2083
49704364 2084=item Invalid type '%s' in %s
96e4d5b1 2085
49704364
LW
2086(F) The given character is not a valid pack or unpack type.
2087See L<perlfunc/pack>.
2088(W) The given character is not a valid pack or unpack type but used to be
75b44862 2089silently ignored.
96e4d5b1 2090
46314c13
JP
2091=item Invalid version format (multiple underscores)
2092
2093(F) Versions may contain at most a single underscore, which signals
2094that the version is a beta release. See L<version> for the allowed
2095version formats.
2096
2097=item Invalid version format (underscores before decimal)
2098
2099(F) Versions may not contain decimals after the optional underscore.
2100See L<version> for the allowed version formats.
2101
a0d0e21e
LW
2102=item ioctl is not implemented
2103
2104(F) Your machine apparently doesn't implement ioctl(), which is pretty
2105strange for a machine that supports C.
2106
c289d2f7
JH
2107=item ioctl() on unopened %s
2108
2109(W unopened) You tried ioctl() on a filehandle that was never opened.
2110Check you control flow and number of arguments.
2111
363c40c4
SB
2112=item IO layers (like "%s") unavailable
2113
2114(F) Your Perl has not been configured to have PerlIO, and therefore
2115you cannot use IO layers. To have PerlIO Perl must be configured
2116with 'useperlio'.
2117
80cbd5ad
JH
2118=item IO::Socket::atmark not implemented on this architecture
2119
2120(F) Your machine doesn't implement the sockatmark() functionality,
2121neither as a system call or an ioctl call (SIOCATMARK).
2122
b4581f09
JH
2123=item $* is no longer supported
2124
2125(D deprecated) The special variable C<$*>, deprecated in older perls, has
2126been removed as of 5.9.0 and is no longer supported. You should use the
2127C<//m> and C<//s> regexp modifiers instead.
2128
8ae1fe26
RGS
2129=item $# is no longer supported
2130
2131(D deprecated) The special variable C<$#>, deprecated in older perls, has
2132been removed as of 5.9.3 and is no longer supported. You should use the
2133printf/sprintf functions instead.
2134
6ad11d81
JH
2135=item `%s' is not a code reference
2136
04a80ee0
RGS
2137(W overload) The second (fourth, sixth, ...) argument of overload::constant
2138needs to be a code reference. Either an anonymous subroutine, or a reference
6ad11d81
JH
2139to a subroutine.
2140
2141=item `%s' is not an overloadable type
2142
04a80ee0
RGS
2143(W overload) You tried to overload a constant type the overload package is
2144unaware of.
6ad11d81 2145
a0d0e21e
LW
2146=item junk on end of regexp
2147
2148(P) The regular expression parser is confused.
2149
2150=item Label not found for "last %s"
2151
be771a83
GS
2152(F) You named a loop to break out of, but you're not currently in a loop
2153of that name, not even if you count where you were called from. See
2154L<perlfunc/last>.
a0d0e21e
LW
2155
2156=item Label not found for "next %s"
2157
2158(F) You named a loop to continue, but you're not currently in a loop of
2159that name, not even if you count where you were called from. See
2160L<perlfunc/last>.
2161
2162=item Label not found for "redo %s"
2163
2164(F) You named a loop to restart, but you're not currently in a loop of
2165that name, not even if you count where you were called from. See
2166L<perlfunc/last>.
2167
85ab1d1d 2168=item leaving effective %s failed
5ff3f7a4 2169
85ab1d1d 2170(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
2171effective uids or gids failed.
2172
49704364
LW
2173=item length/code after end of string in unpack
2174
d7f8936a 2175(F) While unpacking, the string buffer was already used up when an unpack
49704364
LW
2176length/code combination tried to obtain more data. This results in
2177an undefined value for the length. See L<perlfunc/pack>.
2178
69282e91 2179=item listen() on closed socket %s
a0d0e21e 2180
be771a83
GS
2181(W closed) You tried to do a listen on a closed socket. Did you forget
2182to check the return value of your socket() call? See
2183L<perlfunc/listen>.
a0d0e21e 2184
49704364 2185=item Lookbehind longer than %d not implemented in regex; marked by <-- HERE in m/%s/
b45f050a
JF
2186
2187(F) There is currently a limit on the length of string which lookbehind can
7253e4e3
RK
2188handle. This restriction may be eased in a future release. The <-- HERE
2189shows in the regular expression about where the problem was discovered.
2e50fd82 2190
2f7da168
RK
2191=item lstat() on filehandle %s
2192
2193(W io) You tried to do an lstat on a filehandle. What did you mean
2194by that? lstat() makes sense only on filenames. (Perl did a fstat()
2195instead on the filehandle.)
2196
96ebfdd7
RK
2197=item Lvalue subs returning %s not implemented yet
2198
2199(F) Due to limitations in the current implementation, array and hash
2200values cannot be returned in subroutines used in lvalue context. See
2201L<perlsub/"Lvalue subroutines">.
2202
49704364
LW
2203=item Malformed integer in [] in pack
2204
2205(F) Between the brackets enclosing a numeric repeat count only digits
2206are permitted. See L<perlfunc/pack>.
2207
2208=item Malformed integer in [] in unpack
2209
2210(F) Between the brackets enclosing a numeric repeat count only digits
2211are permitted. See L<perlfunc/pack>.
2212
6df41af2
GS
2213=item Malformed PERLLIB_PREFIX
2214
2215(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
2216
2217 prefix1;prefix2
2218
2219or
6df41af2
GS
2220 prefix1 prefix2
2221
be771a83
GS
2222with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of
2223a builtin library search path, prefix2 is substituted. The error may
2224appear if components are not found, or are too long. See
fecfaeb8 2225"PERLLIB_PREFIX" in L<perlos2>.
6df41af2 2226
2f758a16
ST
2227=item Malformed prototype for %s: %s
2228
d37a9538
ST
2229(F) You tried to use a function with a malformed prototype. The
2230syntax of function prototypes is given a brief compile-time check for
2231obvious errors like invalid characters. A more rigorous check is run
2232when the function is called.
2f758a16 2233
ba210ebe
JH
2234=item Malformed UTF-8 character (%s)
2235
987b48f0
RGS
2236(S utf8) (F) Perl detected something that didn't comply with UTF-8
2237encoding rules.
ba210ebe 2238
901b21bf
JH
2239One possible cause is that you read in data that you thought to be in
2240UTF-8 but it wasn't (it was for example legacy 8-bit data). Another
2241possibility is careless use of utf8::upgrade().
2242
dea0fc0b
JH
2243=item Malformed UTF-16 surrogate
2244
2245Perl thought it was reading UTF-16 encoded character data but while
2246doing it Perl met a malformed Unicode surrogate.
2247
f337b084
TH
2248=item Malformed UTF-8 string in pack
2249
2250(F) You tried to pack something that didn't comply with UTF-8 encoding
2251rules and perl was unable to guess how to make more progress.
2252
2253=item Malformed UTF-8 string in unpack
2254
2255(F) You tried to unpack something that didn't comply with UTF-8 encoding
2256rules and perl was unable to guess how to make more progress.
2257
2258=item Malformed UTF-8 string in '%c' format in unpack
2259
2260(F) You tried to unpack something that didn't comply with UTF-8 encoding
2261rules and perl was unable to guess how to make more progress.
2262
49704364 2263=item %s matches null string many times in regex; marked by <-- HERE in m/%s/
6df41af2
GS
2264
2265(W regexp) The pattern you've specified would be an infinite loop if the
7253e4e3
RK
2266regular expression engine didn't specifically check for that. The <-- HERE
2267shows in the regular expression about where the problem was discovered.
2268See L<perlre>.
6df41af2 2269
25f58aea
PN
2270=item "%s" may clash with future reserved word
2271
2272(W) This warning may be due to running a perl5 script through a perl4
2273interpreter, especially if the word that is being warned about is
2274"use" or "my".
2275
49704364 2276=item % may not be used in pack
6df41af2
GS
2277
2278(F) You can't pack a string by supplying a checksum, because the
be771a83
GS
2279checksumming process loses information, and you can't go the other way.
2280See L<perlfunc/unpack>.
6df41af2 2281
a0d0e21e
LW
2282=item Method for operation %s not found in package %s during blessing
2283
2284(F) An attempt was made to specify an entry in an overloading table that
e7ea3e70 2285doesn't resolve to a valid subroutine. See L<overload>.
a0d0e21e 2286
3cdd684c
TP
2287=item Method %s not permitted
2288
2289See Server error.
2290
a0d0e21e
LW
2291=item Might be a runaway multi-line %s string starting on line %d
2292
2293(S) An advisory indicating that the previous error may have been caused
2294by a missing delimiter on a string or pattern, because it eventually
2295ended earlier on the current line.
2296
2297=item Misplaced _ in number
2298
d4ced10d
JH
2299(W syntax) An underscore (underbar) in a numeric constant did not
2300separate two digits.
a0d0e21e 2301
9e81e6a1
RGS
2302=item Missing argument to -%c
2303
2304(F) The argument to the indicated command line switch must follow
2305immediately after the switch, without intervening spaces.
2306
4a2d328f 2307=item Missing %sbrace%s on \N{}
423cee85 2308
4a2d328f 2309(F) Wrong syntax of character name literal C<\N{charname}> within
423cee85
JH
2310double-quotish context.
2311
a0d0e21e
LW
2312=item Missing comma after first argument to %s function
2313
2314(F) While certain functions allow you to specify a filehandle or an
2315"indirect object" before the argument list, this ain't one of them.
2316
06eaf0bc
GS
2317=item Missing command in piped open
2318
be771a83
GS
2319(W pipe) You used the C<open(FH, "| command")> or
2320C<open(FH, "command |")> construction, but the command was missing or
2321blank.
06eaf0bc 2322
961ce445
RGS
2323=item Missing control char name in \c
2324
2325(F) A double-quoted string ended with "\c", without the required control
2326character name.
2327
6df41af2
GS
2328=item Missing name in "my sub"
2329
be771a83
GS
2330(F) The reserved syntax for lexically scoped subroutines requires that
2331they have a name with which they can be found.
6df41af2
GS
2332
2333=item Missing $ on loop variable
2334
be771a83
GS
2335(F) Apparently you've been programming in B<csh> too much. Variables
2336are always mentioned with the $ in Perl, unlike in the shells, where it
2337can vary from one line to the next.
6df41af2 2338
cc507455 2339=item (Missing operator before %s?)
748a9306 2340
56da5a46
RGS
2341(S syntax) This is an educated guess made in conjunction with the message
2342"%s found where operator expected". Often the missing operator is a comma.
748a9306 2343
ab13f0c7
JH
2344=item Missing right brace on %s
2345
2346(F) Missing right brace in C<\p{...}> or C<\P{...}>.
2347
d98d5fff 2348=item Missing right curly or square bracket
a0d0e21e 2349
be771a83
GS
2350(F) The lexer counted more opening curly or square brackets than closing
2351ones. As a general rule, you'll find it's missing near the place you
2352were last editing.
a0d0e21e 2353
6df41af2
GS
2354=item (Missing semicolon on previous line?)
2355
56da5a46
RGS
2356(S syntax) This is an educated guess made in conjunction with the message
2357"%s found where operator expected". Don't automatically put a semicolon on
6df41af2
GS
2358the previous line just because you saw this message.
2359
a0d0e21e
LW
2360=item Modification of a read-only value attempted
2361
2362(F) You tried, directly or indirectly, to change the value of a
5f05dabc 2363constant. You didn't, of course, try "2 = 1", because the compiler
a0d0e21e
LW
2364catches that. But an easy way to do the same thing is:
2365
2366 sub mod { $_[0] = 1 }
2367 mod(2);
2368
2369Another way is to assign to a substr() that's off the end of the string.
2370
c5674021
PDF
2371Yet another way is to assign to a C<foreach> loop I<VAR> when I<VAR>
2372is aliased to a constant in the look I<LIST>:
2373
2374 $x = 1;
2375 foreach my $n ($x, 2) {
2376 $n *= 2; # modifies the $x, but fails on attempt to modify the 2
64977eb6 2377 }
c5674021 2378
7a4340ed 2379=item Modification of non-creatable array value attempted, %s
a0d0e21e
LW
2380
2381(F) You tried to make an array value spring into existence, and the
2382subscript was probably negative, even counting from end of the array
2383backwards.
2384
7a4340ed 2385=item Modification of non-creatable hash value attempted, %s
a0d0e21e 2386
be771a83
GS
2387(P) You tried to make a hash value spring into existence, and it
2388couldn't be created for some peculiar reason.
a0d0e21e
LW
2389
2390=item Module name must be constant
2391
2392(F) Only a bare module name is allowed as the first argument to a "use".
2393
be98fb35 2394=item Module name required with -%c option
6df41af2 2395
be98fb35
GS
2396(F) The C<-M> or C<-m> options say that Perl should load some module, but
2397you omitted the name of the module. Consult L<perlrun> for full details
2398about C<-M> and C<-m>.
6df41af2 2399
ed9aa3b7
SG
2400=item More than one argument to open
2401
2402(F) The C<open> function has been asked to open multiple files. This
2403can happen if you are trying to open a pipe to a command that takes a
2404list of arguments, but have forgotten to specify a piped open mode.
2405See L<perlfunc/open> for details.
2406
a0d0e21e
LW
2407=item msg%s not implemented
2408
2409(F) You don't have System V message IPC on your system.
2410
2411=item Multidimensional syntax %s not supported
2412
75b44862
GS
2413(W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>.
2414They're written like C<$foo[1][2][3]>, as in C.
8b1a09fc 2415
49704364 2416=item '/' must follow a numeric type in unpack
6df41af2 2417
49704364
LW
2418(F) You had an unpack template that contained a '/', but this did not
2419follow some unpack specification producing a numeric value.
2420See L<perlfunc/pack>.
6df41af2
GS
2421
2422=item "my sub" not yet implemented
2423
be771a83
GS
2424(F) Lexically scoped subroutines are not yet implemented. Don't try
2425that yet.
6df41af2
GS
2426
2427=item "my" variable %s can't be in a package
2428
be771a83
GS
2429(F) Lexically scoped variables aren't in a package, so it doesn't make
2430sense to try to declare one with a package qualifier on the front. Use
2431local() if you want to localize a package variable.
09bef843 2432
8b1a09fc
PP
2433=item Name "%s::%s" used only once: possible typo
2434
e476b1b5 2435(W once) Typographical errors often show up as unique variable names.
be771a83
GS
2436If you had a good reason for having a unique name, then just mention it
2437again somehow to suppress the message. The C<our> declaration is
77ca0c92 2438provided for this purpose.
a0d0e21e 2439
64b374f4
FD
2440NOTE: This warning detects symbols that have been used only once so $c, @c,
2441%c, *c, &c, sub c{}, c(), and c (the filehandle or format) are considered
2442the same; if a program uses $c only once but also uses any of the others it
2443will not trigger this warning.
2444
49704364
LW
2445=item Negative '/' count in unpack
2446
2447(F) The length count obtained from a length/code unpack operation was
2448negative. See L<perlfunc/pack>.
2449
a0d0e21e
LW
2450=item Negative length
2451
be771a83
GS
2452(F) You tried to do a read/write/send/recv operation with a buffer
2453length that is less than 0. This is difficult to imagine.
a0d0e21e 2454
ed9aa3b7
SG
2455=item Negative offset to vec in lvalue context
2456
2457(F) When C<vec> is called in an lvalue context, the second argument must be
2458greater than or equal to zero.
2459
7253e4e3 2460=item Nested quantifiers in regex; marked by <-- HERE in m/%s/
a0d0e21e 2461
b45f050a 2462(F) You can't quantify a quantifier without intervening parentheses. So
7253e4e3 2463things like ** or +* or ?* are illegal. The <-- HERE shows in the regular
b45f050a 2464expression about where the problem was discovered.
a0d0e21e 2465
7253e4e3 2466Note that the minimal matching quantifiers, C<*?>, C<+?>, and
be771a83 2467C<??> appear to be nested quantifiers, but aren't. See L<perlre>.
a0d0e21e 2468
6df41af2 2469=item %s never introduced
a0d0e21e 2470
be771a83
GS
2471(S internal) The symbol in question was declared but somehow went out of
2472scope before it could possibly have been used.
a0d0e21e
LW
2473
2474=item No %s allowed while running setuid
2475
be771a83
GS
2476(F) Certain operations are deemed to be too insecure for a setuid or
2477setgid script to even be allowed to attempt. Generally speaking there
2478will be another way to do what you want that is, if not secure, at least
2479securable. See L<perlsec>.
a0d0e21e 2480
a0d0e21e
LW
2481=item No comma allowed after %s
2482
2483(F) A list operator that has a filehandle or "indirect object" is not
2484allowed to have a comma between that and the following arguments.
2485Otherwise it'd be just another one of the arguments.
2486
0a753a76
PP
2487One possible cause for this is that you expected to have imported a
2488constant to your name space with B<use> or B<import> while no such
2489importing took place, it may for example be that your operating system
2490does not support that particular constant. Hopefully you did use an
2491explicit import list for the constants you expect to see, please see
2492L<perlfunc/use> and L<perlfunc/import>. While an explicit import list
2493would probably have caught this error earlier it naturally does not
2494remedy the fact that your operating system still does not support that
2495constant. Maybe you have a typo in the constants of the symbol import
2496list of B<use> or B<import> or in the constant name at the line where
2497this error was triggered?
2498
748a9306
LW
2499=item No command into which to pipe on command line
2500
be771a83
GS
2501(F) An error peculiar to VMS. Perl handles its own command line
2502redirection, and found a '|' at the end of the command line, so it
2503doesn't know where you want to pipe the output from this command.
748a9306 2504
a0d0e21e
LW
2505=item No DB::DB routine defined
2506
be771a83 2507(F) The currently executing code was compiled with the B<-d> switch, but
ccafdc96
RGS
2508for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
2509module) didn't define a routine to be called at the beginning of each
2510statement.
a0d0e21e
LW
2511
2512=item No dbm on this machine
2513
2514(P) This is counted as an internal error, because every machine should
5f05dabc 2515supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
a0d0e21e 2516
ccafdc96 2517=item No DB::sub routine defined
a0d0e21e 2518
ccafdc96
RGS
2519(F) The currently executing code was compiled with the B<-d> switch, but
2520for some reason the current debugger (e.g. F<perl5db.pl> or a C<Devel::>
2521module) didn't define a C<DB::sub> routine to be called at the beginning
2522of each ordinary subroutine call.
a0d0e21e 2523
96ebfdd7
RK
2524=item No B<-e> allowed in setuid scripts
2525
2526(F) A setuid script can't be specified by the user.
2527
c47ff5f1 2528=item No error file after 2> or 2>> on command line
748a9306 2529
be771a83
GS
2530(F) An error peculiar to VMS. Perl handles its own command line
2531redirection, and found a '2>' or a '2>>' on the command line, but can't
2532find the name of the file to which to write data destined for stderr.
748a9306 2533
49704364
LW
2534=item No group ending character '%c' found in template
2535
2536(F) A pack or unpack template has an opening '(' or '[' without its
2537matching counterpart. See L<perlfunc/pack>.
2538
c47ff5f1 2539=item No input file after < on command line
748a9306 2540
be771a83
GS
2541(F) An error peculiar to VMS. Perl handles its own command line
2542redirection, and found a '<' on the command line, but can't find the
2543name of the file from which to read data for stdin.
748a9306 2544
6df41af2
GS
2545=item No #! line
2546
2547(F) The setuid emulator requires that scripts have a well-formed #! line
2548even on machines that don't support the #! construct.
2549
2550=item "no" not allowed in expression
2551
be771a83
GS
2552(F) The "no" keyword is recognized and executed at compile time, and
2553returns no useful value. See L<perlmod>.
6df41af2 2554
c47ff5f1 2555=item No output file after > on command line
748a9306 2556
be771a83
GS
2557(F) An error peculiar to VMS. Perl handles its own command line
2558redirection, and found a lone '>' at the end of the command line, so it
2559doesn't know where you wanted to redirect stdout.
748a9306 2560
c47ff5f1 2561=item No output file after > or >> on command line
748a9306 2562
be771a83
GS
2563(F) An error peculiar to VMS. Perl handles its own command line
2564redirection, and found a '>' or a '>>' on the command line, but can't
2565find the name of the file to which to write data destined for stdout.
748a9306 2566
1ec3e8de
GS
2567=item No package name allowed for variable %s in "our"
2568
be771a83
GS
2569(F) Fully qualified variable names are not allowed in "our"
2570declarations, because that doesn't make much sense under existing
2571semantics. Such syntax is reserved for future extensions.
1ec3e8de 2572
a0d0e21e
LW
2573=item No Perl script found in input
2574
2575(F) You called C<perl -x>, but no line was found in the file beginning
2576with #! and containing the word "perl".
2577
2578=item No setregid available
2579
2580(F) Configure didn't find anything resembling the setregid() call for
2581your system.
2582
2583=item No setreuid available
2584
2585(F) Configure didn't find anything resembling the setreuid() call for
2586your system.
2587
6df41af2
GS
2588=item No %s specified for -%c
2589
2590(F) The indicated command line switch needs a mandatory argument, but
2591you haven't specified one.
2592
e75d1f10
RD
2593=item No such class field "%s" in variable %s of type %s
2594
2595(F) You tried to access a key from a hash through the indicated typed variable
2596but that key is not allowed by the package of the same type. The indicated
2597package has restricted the set of allowed keys using the L<fields> pragma.
2598
2c692339
RGS
2599=item No such class %s
2600
2601(F) You provided a class qualifier in a "my" or "our" declaration, but
2602this class doesn't exist at this point in your program.
2603
6df41af2
GS
2604=item No such pipe open
2605
2606(P) An error peculiar to VMS. The internal routine my_pclose() tried to
be771a83
GS
2607close a pipe which hadn't been opened. This should have been caught
2608earlier as an attempt to close an unopened filehandle.
6df41af2 2609
a0d0e21e
LW
2610=item No such signal: SIG%s
2611
be771a83
GS
2612(W signal) You specified a signal name as a subscript to %SIG that was
2613not recognized. Say C<kill -l> in your shell to see the valid signal
2614names on your system.
a0d0e21e
LW
2615
2616=item Not a CODE reference
2617
2618(F) Perl was trying to evaluate a reference to a code value (that is, a
2619subroutine), but found a reference to something else instead. You can
be771a83
GS
2620use the ref() function to find out what kind of ref it really was. See
2621also L<perlref>.
a0d0e21e
LW
2622
2623=item Not a format reference
2624
2625(F) I'm not sure how you managed to generate a reference to an anonymous
2626format, but this indicates you did, and that it didn't exist.
2627
2628=item Not a GLOB reference
2629
be771a83
GS
2630(F) Perl was trying to evaluate a reference to a "typeglob" (that is, a
2631symbol table entry that looks like C<*foo>), but found a reference to
2632something else instead. You can use the ref() function to find out what
2633kind of ref it really was. See L<perlref>.
a0d0e21e
LW
2634
2635=item Not a HASH reference
2636
be771a83
GS
2637(F) Perl was trying to evaluate a reference to a hash value, but found a
2638reference to something else instead. You can use the ref() function to
2639find out what kind of ref it really was. See L<perlref>.
a0d0e21e 2640
6df41af2
GS
2641=item Not an ARRAY reference
2642
be771a83
GS
2643(F) Perl was trying to evaluate a reference to an array value, but found
2644a reference to something else instead. You can use the ref() function
2645to find out what kind of ref it really was. See L<perlref>.
6df41af2 2646
a0d0e21e
LW
2647=item Not a perl script
2648
2649(F) The setuid emulator requires that scripts have a well-formed #! line
2650even on machines that don't support the #! construct. The line must
2651mention perl.
2652
2653=item Not a SCALAR reference
2654
be771a83
GS
2655(F) Perl was trying to evaluate a reference to a scalar value, but found
2656a reference to something else instead. You can use the ref() function
2657to find out what kind of ref it really was. See L<perlref>.
a0d0e21e
LW
2658
2659=item Not a subroutine reference
2660
2661(F) Perl was trying to evaluate a reference to a code value (that is, a
2662subroutine), but found a reference to something else instead. You can
be771a83
GS
2663use the ref() function to find out what kind of ref it really was. See
2664also L<perlref>.
a0d0e21e 2665
e7ea3e70 2666=item Not a subroutine reference in overload table
a0d0e21e
LW
2667
2668(F) An attempt was made to specify an entry in an overloading table that
8b1a09fc 2669doesn't somehow point to a valid subroutine. See L<overload>.
a0d0e21e 2670
a0d0e21e
LW
2671=item Not enough arguments for %s
2672
2673(F) The function requires more arguments than you specified.
2674
6df41af2
GS
2675=item Not enough format arguments
2676
be771a83
GS
2677(W syntax) A format specified more picture fields than the next line
2678supplied. See L<perlform>.
6df41af2
GS
2679
2680=item %s: not found
2681
be771a83
GS
2682(A) You've accidentally run your script through the Bourne shell instead
2683of Perl. Check the #! line, or manually feed your script into Perl
2684yourself.
6df41af2
GS
2685
2686=item no UTC offset information; assuming local time is UTC
a0d0e21e 2687
6df41af2
GS
2688(S) A warning peculiar to VMS. Perl was unable to find the local
2689timezone offset, so it's assuming that local system time is equivalent
be771a83
GS
2690to UTC. If it's not, define the logical name
2691F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which
2692need to be added to UTC to get local time.
a0d0e21e 2693
4ef2275c
GA
2694=item Non-string passed as bitmask
2695
2696(W misc) A number has been passed as a bitmask argument to select().
2697Use the vec() function to construct the file descriptor bitmasks for
2698select. See L<perlfunc/select>
2699
a0d0e21e
LW
2700=item Null filename used
2701
be771a83
GS
2702(F) You can't require the null filename, especially because on many
2703machines that means the current directory! See L<perlfunc/require>.
a0d0e21e 2704
6df41af2
GS
2705=item NULL OP IN RUN
2706
be771a83
GS
2707(P debugging) Some internal routine called run() with a null opcode
2708pointer.
6df41af2 2709
55497cff
PP
2710=item Null picture in formline
2711
2712(F) The first argument to formline must be a valid format picture
2713specification. It was found to be empty, which probably means you
2714supplied it an uninitialized value. See L<perlform>.
2715
a0d0e21e
LW
2716=item Null realloc
2717
2718(P) An attempt was made to realloc NULL.
2719
2720=item NULL regexp argument
2721
5f05dabc 2722(P) The internal pattern matching routines blew it big time.
a0d0e21e
LW
2723
2724=item NULL regexp parameter
2725
2726(P) The internal pattern matching routines are out of their gourd.
2727
fc36a67e
PP
2728=item Number too long
2729
be771a83 2730(F) Perl limits the representation of decimal numbers in programs to
da75cd15 2731about 250 characters. You've exceeded that length. Future
be771a83
GS
2732versions of Perl are likely to eliminate this arbitrary limitation. In
2733the meantime, try using scientific notation (e.g. "1e6" instead of
2734"1_000_000").
fc36a67e 2735
6df41af2
GS
2736=item Octal number in vector unsupported
2737
be771a83
GS
2738(F) Numbers with a leading C<0> are not currently allowed in vectors.
2739The octal number interpretation of such numbers may be supported in a
2740future version.
6df41af2 2741
252aa082
JH
2742=item Octal number > 037777777777 non-portable
2743
75b44862 2744(W portable) The octal number you specified is larger than 2**32-1
be771a83
GS
2745(4294967295) and therefore non-portable between systems. See
2746L<perlport> for more on portability concerns.
252aa082
JH
2747
2748See also L<perlport> for writing portable code.
2749
6ad11d81
JH
2750=item Odd number of arguments for overload::constant
2751
04a80ee0
RGS
2752(W overload) The call to overload::constant contained an odd number of
2753arguments. The arguments should come in pairs.
6ad11d81 2754
b21befc1
MG
2755=item Odd number of elements in anonymous hash
2756
2757(W misc) You specified an odd number of elements to initialize a hash,
2758which is odd, because hashes come in key/value pairs.
2759
1930e939 2760=item Odd number of elements in hash assignment
a0d0e21e 2761
be771a83
GS
2762(W misc) You specified an odd number of elements to initialize a hash,
2763which is odd, because hashes come in key/value pairs.
a0d0e21e 2764
bbce6d69
PP
2765=item Offset outside string
2766
2767(F) You tried to do a read/write/send/recv operation with an offset
be771a83
GS
2768pointing outside the buffer. This is difficult to imagine. The sole
2769exception to this is that C<sysread()>ing past the buffer will extend
2770the buffer and zero pad the new area.
bbce6d69 2771
c289d2f7 2772=item %s() on unopened %s
2dd78f96
JH
2773
2774(W unopened) An I/O operation was attempted on a filehandle that was
2775never initialized. You need to do an open(), a sysopen(), or a socket()
2776call, or call a constructor from the FileHandle package.
2777
96ebfdd7
RK
2778=item -%s on unopened filehandle %s
2779
2780(W unopened) You tried to invoke a file test operator on a filehandle
2781that isn't open. Check your control flow. See also L<perlfunc/-X>.
2782
a0d0e21e
LW
2783=item oops: oopsAV
2784
e476b1b5 2785(S internal) An internal warning that the grammar is screwed up.
a0d0e21e
LW
2786
2787=item oops: oopsHV
2788
e476b1b5 2789(S internal) An internal warning that the grammar is screwed up.
a0d0e21e 2790
a0288114 2791=item Operation "%s": no method found, %s
44a8e56a 2792
be771a83
GS
2793(F) An attempt was made to perform an overloaded operation for which no
2794handler was defined. While some handlers can be autogenerated in terms
2795of other handlers, there is no default handler for any operation, unless
2796C<fallback> overloading key is specified to be true. See L<overload>.
44a8e56a 2797
748a9306
LW
2798=item Operator or semicolon missing before %s
2799
be771a83
GS
2800(S ambiguous) You used a variable or subroutine call where the parser
2801was expecting an operator. The parser has assumed you really meant to
2802use an operator, but this is highly likely to be incorrect. For
2803example, if you say "*foo *foo" it will be interpreted as if you said
2804"*foo * 'foo'".
748a9306 2805
6df41af2
GS
2806=item "our" variable %s redeclared
2807
be771a83
GS
2808(W misc) You seem to have already declared the same global once before
2809in the current lexical scope.
6df41af2 2810
a80b8354
GS
2811=item Out of memory!
2812
2813(X) The malloc() function returned 0, indicating there was insufficient
be771a83
GS
2814remaining memory (or virtual memory) to satisfy the request. Perl has
2815no option but to exit immediately.
a80b8354 2816
19a52907
JH
2817At least in Unix you may be able to get past this by increasing your
2818process datasize limits: in csh/tcsh use C<limit> and
2819C<limit datasize n> (where C<n> is the number of kilobytes) to check
2820the current limits and change them, and in ksh/bash/zsh use C<ulimit -a>
2821and C<ulimit -d n>, respectively.
2822
6d3b25aa
RGS
2823=item Out of memory during %s extend
2824
2825(X) An attempt was made to extend an array, a list, or a string beyond
2826the largest possible memory allocation.
2827
6df41af2 2828=item Out of memory during "large" request for %s
a0d0e21e 2829
6df41af2
GS
2830(F) The malloc() function returned 0, indicating there was insufficient
2831remaining memory (or virtual memory) to satisfy the request. However,
be771a83
GS
2832the request was judged large enough (compile-time default is 64K), so a
2833possibility to shut down by trapping this error is granted.
a0d0e21e 2834
1b979e0a 2835=item Out of memory during request for %s
a0d0e21e 2836
be771a83
GS
2837(X|F) The malloc() function returned 0, indicating there was
2838insufficient remaining memory (or virtual memory) to satisfy the
2839request.
eff9c6e2
CS
2840
2841The request was judged to be small, so the possibility to trap it
2842depends on the way perl was compiled. By default it is not trappable.
be771a83
GS
2843However, if compiled for this, Perl may use the contents of C<$^M> as an
2844emergency pool after die()ing with this message. In this case the error
b022d2d2
IZ
2845is trappable I<once>, and the error message will include the line and file
2846where the failed request happened.
55497cff 2847
1b979e0a
IZ
2848=item Out of memory during ridiculously large request
2849
2850(F) You can't allocate more than 2^31+"small amount" bytes. This error
be771a83
GS
2851is most likely to be caused by a typo in the Perl program. e.g.,
2852C<$arr[time]> instead of C<$arr[$time]>.
1b979e0a 2853
6df41af2
GS
2854=item Out of memory for yacc stack
2855
be771a83
GS
2856(F) The yacc parser wanted to grow its stack so it could continue
2857parsing, but realloc() wouldn't give it more memory, virtual or
2858otherwise.
6df41af2 2859
28be1210
TH
2860=item '.' outside of string in pack
2861
2862(F) The argument to a '.' in your template tried to move the working
2863position to before the start of the packed string being built.
2864
49704364 2865=item '@' outside of string in unpack
6df41af2 2866
49704364 2867(F) You had a template that specified an absolute position outside
6df41af2
GS
2868the string being unpacked. See L<perlfunc/pack>.
2869
f337b084
TH
2870=item '@' outside of string with malformed UTF-8 in unpack
2871
2872(F) You had a template that specified an absolute position outside
2873the string being unpacked. The string being unpacked was also invalid
2874UTF-8. See L<perlfunc/pack>.
2875
6df41af2
GS
2876=item %s package attribute may clash with future reserved word: %s
2877
be771a83
GS
2878(W reserved) A lowercase attribute name was used that had a
2879package-specific handler. That name might have a meaning to Perl itself
2880some day, even though it doesn't yet. Perhaps you should use a
2881mixed-case attribute name, instead. See L<attributes>.
6df41af2 2882
96ebfdd7
RK
2883=item pack/unpack repeat count overflow
2884
2885(F) You can't specify a repeat count so large that it overflows your
2886signed integers. See L<perlfunc/pack>.
2887
a0d0e21e
LW
2888=item page overflow
2889
be771a83
GS
2890(W io) A single call to write() produced more lines than can fit on a
2891page. See L<perlform>.
a0d0e21e 2892
6df41af2
GS
2893=item panic: %s
2894
2895(P) An internal error.
2896
c99a1475
NC
2897=item panic: attempt to call %s in %s
2898
2899(P) One of the file test operators entered a code branch that calls
2900an ACL related-function, but that function is not available on this
2901platform. Earlier checks mean that it should not be possible to
2902enter this branch on this platform.
2903
a0d0e21e
LW
2904=item panic: ck_grep
2905
2906(P) Failed an internal consistency check trying to compile a grep.
2907
2908=item panic: ck_split
2909
2910(P) Failed an internal consistency check trying to compile a split.
2911
2912=item panic: corrupt saved stack index
2913
be771a83
GS
2914(P) The savestack was requested to restore more localized values than
2915there are in the savestack.
a0d0e21e 2916
810b8aa5
GS
2917=item panic: del_backref
2918
2919(P) Failed an internal consistency check while trying to reset a weak
2920reference.
2921
7619c85e
RG
2922=item panic: Devel::DProf inconsistent subroutine return
2923
2924(P) Devel::DProf called a subroutine that exited using goto(LABEL),
2925last(LABEL) or next(LABEL). Leaving that way a subroutine called from
2926an XSUB will lead very probably to a crash of the interpreter. This is
2927a bug that will hopefully one day get fixed.
2928
a0d0e21e
LW
2929=item panic: die %s
2930
2931(P) We popped the context stack to an eval context, and then discovered
2932it wasn't an eval context.
2933
a0d0e21e
LW
2934=item panic: do_subst
2935
be771a83
GS
2936(P) The internal pp_subst() routine was called with invalid operational
2937data.
a0d0e21e 2938
2269b42e 2939=item panic: do_trans_%s
a0d0e21e 2940
2269b42e 2941(P) The internal do_trans routines were called with invalid operational
be771a83 2942data.
a0d0e21e 2943
b7f7fd0b
NC
2944=item panic: fold_constants JMPENV_PUSH returned %d
2945
10203f38 2946(P) While attempting folding constants an exception other than an C<eval>
b7f7fd0b
NC
2947failure was caught.
2948
c635e13b
PP
2949=item panic: frexp
2950
2951(P) The library function frexp() failed, making printf("%f") impossible.
2952
a0d0e21e
LW
2953=item panic: goto
2954
2955(P) We popped the context stack to a context with the specified label,
2956and then discovered it wasn't a context we know how to do a goto in.
2957
23976bdd
NC
2958=item panic: hfreeentries failed to free hash
2959
2960(P) The internal routine used to clear a hashes entries tried repeatedly,
2961but each time something added more entries to the hash. Most likely the hash
2962contains an object with a reference back to the hash and a destructor that
2963adds a new object to the hash.
2964
a0d0e21e
LW
2965=item panic: INTERPCASEMOD
2966
2967(P) The lexer got into a bad state at a case modifier.
2968
2969=item panic: INTERPCONCAT
2970
2971(P) The lexer got into a bad state parsing a string with brackets.
2972
e446cec8
IZ
2973=item panic: kid popen errno read
2974
2975(F) forked child returned an incomprehensible message about its errno.
2976
a0d0e21e
LW
2977=item panic: last
2978
2979(P) We popped the context stack to a block context, and then discovered
2980it wasn't a block context.
2981
2982=item panic: leave_scope clearsv
2983
be771a83
GS
2984(P) A writable lexical variable became read-only somehow within the
2985scope.
a0d0e21e
LW
2986
2987=item panic: leave_scope inconsistency
2988
2989(P) The savestack probably got out of sync. At least, there was an
2990invalid enum on the top of it.
2991
810b8aa5
GS
2992=item panic: magic_killbackrefs
2993
2994(P) Failed an internal consistency check while trying to reset all weak
2995references to an object.
2996
6df41af2
GS
2997=item panic: malloc
2998
2999(P) Something requested a negative number of bytes of malloc.
3000
27d5b266
JH
3001=item panic: memory wrap
3002
3003(P) Something tried to allocate more memory than possible.
3004
a0d0e21e
LW
3005=item panic: pad_alloc
3006
3007(P) The compiler got confused about which scratch pad it was allocating
3008and freeing temporaries and lexicals from.
3009
3010=item panic: pad_free curpad
3011
3012(P) The compiler got confused about which scratch pad it was allocating
3013and freeing temporaries and lexicals from.
3014
3015=item panic: pad_free po
3016
3017(P) An invalid scratch pad offset was detected internally.
3018
3019=item panic: pad_reset curpad
3020
3021(P) The compiler got confused about which scratch pad it was allocating
3022and freeing temporaries and lexicals from.
3023
3024=item panic: pad_sv po
3025
3026(P) An invalid scratch pad offset was detected internally.
3027
3028=item panic: pad_swipe curpad
3029
3030(P) The compiler got confused about which scratch pad it was allocating
3031and freeing temporaries and lexicals from.
3032
3033=item panic: pad_swipe po
3034
3035(P) An invalid scratch pad offset was detected internally.
3036
3037=item panic: pp_iter
3038
3039(P) The foreach iterator got called in a non-loop context frame.
3040
96ebfdd7
RK
3041=item panic: pp_match%s
3042
3043(P) The internal pp_match() routine was called with invalid operational
3044data.
3045
2269b42e
JH
3046=item panic: pp_split
3047
3048(P) Something terrible went wrong in setting up for the split.
3049
a0d0e21e
LW
3050=item panic: realloc
3051
3052(P) Something requested a negative number of bytes of realloc.
3053
3054=item panic: restartop
3055
3056(P) Some internal routine requested a goto (or something like it), and
3057didn't supply the destination.
3058
3059=item panic: return
3060
3061(P) We popped the context stack to a subroutine or eval context, and
3062then discovered it wasn't a subroutine or eval context.
3063
3064=item panic: scan_num
3065
3066(P) scan_num() got called on something that wasn't a number.
3067
3068=item panic: sv_insert
3069
3070(P) The sv_insert() routine was told to remove more string than there
3071was string.
3072
3073=item panic: top_env
3074
6224f72b 3075(P) The compiler attempted to do a goto, or something weird like that.
a0d0e21e 3076
65bca31a
NC
3077=item panic: unimplemented op %s (#%d) called
3078
3079(P) The compiler is screwed up and attempted to use an op that isn't permitted
3080at run time.
3081
dea0fc0b
JH
3082=item panic: utf16_to_utf8: odd bytelen
3083
3084(P) Something tried to call utf16_to_utf8 with an odd (as opposed
64977eb6 3085to even) byte length.
dea0fc0b 3086
2f7da168
RK
3087=item panic: yylex
3088
3089(P) The lexer got into a bad state while processing a case modifier.
3090
7b8d334a 3091=item Parentheses missing around "%s" list
a0d0e21e 3092
e476b1b5 3093(W parenthesis) You said something like
a0d0e21e
LW
3094
3095 my $foo, $bar = @_;
3096
3097when you meant
3098
3099 my ($foo, $bar) = @_;
3100
54884818 3101Remember that "my", "our", and "local" bind tighter than comma.
a0d0e21e 3102
96ebfdd7
RK
3103=item C<-p> destination: %s
3104
3105(F) An error occurred during the implicit output invoked by the C<-p>
3106command-line switch. (This output goes to STDOUT unless you've
3107redirected it with select().)
3108
3109=item (perhaps you forgot to load "%s"?)
3110
3111(F) This is an educated guess made in conjunction with the message
3112"Can't locate object method \"%s\" via package \"%s\"". It often means
3113that a method requires a package that has not been loaded.
3114
1109a392
MHM
3115=item Perl_my_%s() not available
3116
3117(F) Your platform has very uncommon byte-order and integer size,
3118so it was not possible to set up some or all fixed-width byte-order
3119conversion functions. This is only a problem when you're using the
3120'<' or '>' modifiers in (un)pack templates. See L<perlfunc/pack>.
3121
6d3b25aa
RGS
3122=item Perl %s required--this is only version %s, stopped
3123
3124(F) The module in question uses features of a version of Perl more
3125recent than the currently running version. How long has it been since
3126you upgraded, anyway? See L<perlfunc/require>.
3127
6df41af2
GS
3128=item PERL_SH_DIR too long
3129
3130(F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the
fecfaeb8 3131C<sh>-shell in. See "PERL_SH_DIR" in L<perlos2>.
6df41af2 3132
96ebfdd7
RK
3133=item PERL_SIGNALS illegal: "%s"
3134
3135See L<perlrun/PERL_SIGNALS> for legal values.
3136
6df41af2
GS
3137=item perl: warning: Setting locale failed.
3138
3139(S) The whole warning message will look something like:
3140
3141 perl: warning: Setting locale failed.
3142 perl: warning: Please check that your locale settings:
3143 LC_ALL = "En_US",
3144 LANG = (unset)
3145 are supported and installed on your system.
3146 perl: warning: Falling back to the standard locale ("C").
3147
3148Exactly what were the failed locale settings varies. In the above the
3149settings were that the LC_ALL was "En_US" and the LANG had no value.
0ea6b70f
JH
3150This error means that Perl detected that you and/or your operating
3151system supplier and/or system administrator have set up the so-called
3152locale system but Perl could not use those settings. This was not
3153dead serious, fortunately: there is a "default locale" called "C" that
3154Perl can and will use, the script will be run. Before you really fix
3155the problem, however, you will get the same error message each time
3156you run Perl. How to really fix the problem can be found in
3157L<perllocale> section B<LOCALE PROBLEMS>.
6df41af2 3158
a0d0e21e
LW
3159=item Permission denied
3160
3161(F) The setuid emulator in suidperl decided you were up to no good.
3162
bd3fa61c 3163=item pid %x not a child
748a9306 3164
be771a83
GS
3165(W exec) A warning peculiar to VMS. Waitpid() was asked to wait for a
3166process which isn't a subprocess of the current process. While this is
3167fine from VMS' perspective, it's probably not what you intended.
748a9306 3168
49704364 3169=item 'P' must have an explicit size in unpack
3bf38418
WL
3170
3171(F) The unpack format P must have an explicit size, not "*".
3172
96ebfdd7
RK
3173=item B<-P> not allowed for setuid/setgid script
3174
3175(F) The script would have to be opened by the C preprocessor by name,
3176which provides a race condition that breaks security.
3177
3178=item POSIX class [:%s:] unknown in regex; marked by <-- HERE in m/%s/
3179
3180(F) The class in the character class [: :] syntax is unknown. The <-- HERE
3181shows in the regular expression about where the problem was discovered.
3182Note that the POSIX character classes do B<not> have the C<is> prefix
3183the corresponding C interfaces have: in other words, it's C<[[:print:]]>,
3184not C<isprint>. See L<perlre>.
3185
3186=item POSIX getpgrp can't take an argument
3187
3188(F) Your system has POSIX getpgrp(), which takes no argument, unlike
3189the BSD version, which takes a pid.
3190
49704364 3191=item POSIX syntax [%s] belongs inside character classes in regex; marked by <-- HERE in m/%s/
b45f050a 3192
9a0b3859 3193(W regexp) The character class constructs [: :], [= =], and [. .] go
7253e4e3
RK
3194I<inside> character classes, the [] are part of the construct, for example:
3195/[012[:alpha:]345]/. Note that [= =] and [. .] are not currently
3196implemented; they are simply placeholders for future extensions and will
3197cause fatal errors. The <-- HERE shows in the regular expression about
3198where the problem was discovered. See L<perlre>.
b45f050a 3199
49704364 3200=item POSIX syntax [. .] is reserved for future extensions in regex; marked by <-- HERE in m/%s/
b45f050a
JF
3201
3202(F regexp) Within regular expression character classes ([]) the syntax
7253e4e3
RK
3203beginning with "[." and ending with ".]" is reserved for future extensions.
3204If you need to represent those character sequences inside a regular
3205expression character class, just quote the square brackets with the
3206backslash: "\[." and ".\]". The <-- HERE shows in the regular expression
3207about where the problem was discovered. See L<perlre>.
b45f050a 3208
49704364 3209=item POSIX syntax [= =] is reserved for future extensions in regex; marked by <-- HERE in m/%s/
b45f050a 3210
7253e4e3
RK
3211(F) Within regular expression character classes ([]) the syntax beginning
3212with "[=" and ending with "=]" is reserved for future extensions. If you
3213need to represent those character sequences inside a regular expression
3214character class, just quote the square brackets with the backslash: "\[="
3215and "=\]". The <-- HERE shows in the regular expression about where the
3216problem was discovered. See L<perlre>.
b45f050a 3217
bbce6d69
PP
3218=item Possible attempt to put comments in qw() list
3219
e476b1b5 3220(W qw) qw() lists contain items separated by whitespace; as with literal
75b44862 3221strings, comment characters are not ignored, but are instead treated as
be771a83
GS
3222literal data. (You may have used different delimiters than the
3223parentheses shown here; braces are also frequently used.)
bbce6d69 3224
774d564b
PP
3225You probably wrote something like this:
3226
54310121 3227 @list = qw(
774d564b 3228 a # a comment
bbce6d69 3229 b # another comment
774d564b 3230 );
bbce6d69
PP
3231
3232when you should have written this:
3233
774d564b 3234 @list = qw(
54310121
PP
3235 a
3236 b
774d564b
PP
3237 );
3238
3239If you really want comments, build your list the
3240old-fashioned way, with quotes and commas:
3241
3242 @list = (
3243 'a', # a comment
3244 'b', # another comment
3245 );
bbce6d69
PP
3246
3247=item Possible attempt to separate words with commas
3248
be771a83
GS
3249(W qw) qw() lists contain items separated by whitespace; therefore
3250commas aren't needed to separate the items. (You may have used
3251different delimiters than the parentheses shown here; braces are also
3252frequently used.)
bbce6d69 3253
54310121 3254You probably wrote something like this:
bbce6d69 3255
774d564b
PP
3256 qw! a, b, c !;
3257
3258which puts literal commas into some of the list items. Write it without
3259commas if you don't want them to appear in your data:
bbce6d69 3260
774d564b 3261 qw! a b c !;
bbce6d69 3262
a0d0e21e
LW
3263=item Possible memory corruption: %s overflowed 3rd argument
3264
3265(F) An ioctl() or fcntl() returned more than Perl was bargaining for.
3266Perl guesses a reasonable buffer size, but puts a sentinel byte at the
3267end of the buffer just in case. This sentinel byte got clobbered, and
3268Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>.
3269
276b2a0c
RGS
3270=item Possible precedence problem on bitwise %c operator
3271
3272(W precedence) Your program uses a bitwise logical operator in conjunction
3273with a numeric comparison operator, like this :
3274
3275 if ($x & $y == 0) { ... }
3276
3277This expression is actually equivalent to C<$x & ($y == 0)>, due to the
3278higher precedence of C<==>. This is probably not what you want. (If you
96a925ab
YST
3279really meant to write this, disable the warning, or, better, put the
3280parentheses explicitly and write C<$x & ($y == 0)>).
276b2a0c 3281
18623440
PS
3282=item Possible unintended interpolation of %s in string
3283
3284(W ambiguous) You said something like `@foo' in a double-quoted string
32b0a12e
AMS
3285but there was no array C<@foo> in scope at the time. If you wanted a
3286literal @foo, then write it as \@foo; otherwise find out what happened
3287to the array you apparently lost track of.
18623440 3288
8cd79558
GS
3289=item pragma "attrs" is deprecated, use "sub NAME : ATTRS" instead
3290
a1063b2d 3291(D deprecated) You have written something like this:
8cd79558
GS
3292
3293 sub doit
3294 {
3295 use attrs qw(locked);
3296 }
3297
3298You should use the new declaration syntax instead.
3299
3300 sub doit : locked
3301 {
3302 ...
3303
3304The C<use attrs> pragma is now obsolete, and is only provided for
3305backward-compatibility. See L<perlsub/"Subroutine Attributes">.
3306
a0d0e21e
LW
3307=item Precedence problem: open %s should be open(%s)
3308
e476b1b5 3309(S precedence) The old irregular construct
cb1a09d0 3310
a0d0e21e
LW
3311 open FOO || die;
3312
3313is now misinterpreted as
3314
3315 open(FOO || die);
3316
be771a83
GS
3317because of the strict regularization of Perl 5's grammar into unary and
3318list operators. (The old open was a little of both.) You must put
3319parentheses around the filehandle, or use the new "or" operator instead
3320of "||".
a0d0e21e 3321
3cdd684c
TP
3322=item Premature end of script headers
3323
3324See Server error.
3325
6df41af2
GS
3326=item printf() on closed filehandle %s
3327
be771a83 3328(W closed) The filehandle you're writing to got itself closed sometime
c289d2f7 3329before now. Check your control flow.
6df41af2 3330
9a7dcd9c 3331=item print() on closed filehandle %s
a0d0e21e 3332
be771a83 3333(W closed) The filehandle you're printing on got itself closed sometime
c289d2f7 3334before now. Check your control flow.
a0d0e21e 3335
6df41af2 3336=item Process terminated by SIG%s
a0d0e21e 3337
6df41af2
GS
3338(W) This is a standard message issued by OS/2 applications, while *nix
3339applications die in silence. It is considered a feature of the OS/2
3340port. One can easily disable this by appropriate sighandlers, see
3341L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT"
fecfaeb8 3342in L<perlos2>.
a0d0e21e 3343
3fe9a6f1 3344=item Prototype mismatch: %s vs %s
4633a7c4 3345
9a0b3859 3346(S prototype) The subroutine being declared or defined had previously been
be771a83 3347declared or defined with a different function prototype.
4633a7c4 3348
ed9aa3b7
SG
3349=item Prototype not terminated
3350
2a6fd447 3351(F) You've omitted the closing parenthesis in a function prototype
ed9aa3b7
SG
3352definition.
3353
96ebfdd7
RK
3354=item Quantifier follows nothing in regex; marked by <-- HERE in m/%s/
3355
3356(F) You started a regular expression with a quantifier. Backslash it if you
3357meant it literally. The <-- HERE shows in the regular expression about
3358where the problem was discovered. See L<perlre>.
3359
49704364 3360=item Quantifier in {,} bigger than %d in regex; marked by <-- HERE in m/%s/
9baa0206 3361
b45f050a 3362(F) There is currently a limit to the size of the min and max values of the
7253e4e3 3363{min,max} construct. The <-- HERE shows in the regular expression about where
b45f050a 3364the problem was discovered. See L<perlre>.
9baa0206 3365
49704364 3366=item Quantifier unexpected on zero-length expression; marked by <-- HERE in m/%s/
9baa0206 3367
b45f050a
JF
3368(W regexp) You applied a regular expression quantifier in a place where
3369it makes no sense, such as on a zero-width assertion. Try putting the
3370quantifier inside the assertion instead. For example, the way to match
3371"abc" provided that it is followed by three repetitions of "xyz" is
3372C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>.
9baa0206 3373
7253e4e3
RK
3374The <-- HERE shows in the regular expression about where the problem was
3375discovered.
3376
89ea2908
GA
3377=item Range iterator outside integer range
3378
3379(F) One (or both) of the numeric arguments to the range operator ".."
3380are outside the range which can be represented by integers internally.
be771a83
GS
3381One possible workaround is to force Perl to use magical string increment
3382by prepending "0" to your numbers.
89ea2908 3383
3b7fbd4a
SP
3384=item readdir() attempted on invalid dirhandle %s
3385
3386(W io) The dirhandle you're reading from is either closed or not really
3387a dirhandle. Check your control flow.
3388
96ebfdd7
RK
3389=item readline() on closed filehandle %s
3390
3391(W closed) The filehandle you're reading from got itself closed sometime
3392before now. Check your control flow.
3393
b5fe5ca2
SR
3394=item read() on closed filehandle %s
3395
3396(W closed) You tried to read from a closed filehandle.
3397
3398=item read() on unopened filehandle %s
3399
3400(W unopened) You tried to read from a filehandle that was never opened.
3401
6df41af2
GS
3402=item Reallocation too large: %lx
3403
3404(F) You can't allocate more than 64K on an MS-DOS machine.
3405
4ad56ec9
IZ
3406=item realloc() of freed memory ignored
3407
be771a83
GS
3408(S malloc) An internal routine called realloc() on something that had
3409already been freed.
4ad56ec9 3410
a0d0e21e
LW
3411=item Recompile perl with B<-D>DEBUGGING to use B<-D> switch
3412
be771a83
GS
3413(F debugging) You can't use the B<-D> option unless the code to produce
3414the desired output is compiled into Perl, which entails some overhead,
a0d0e21e
LW
3415which is why it's currently left out of your copy.
3416
3e0ccd42 3417=item Recursive inheritance detected in package '%s'
a0d0e21e
LW
3418
3419(F) More than 100 levels of inheritance were used. Probably indicates
3420an unintended loop in your inheritance hierarchy.
3421
7a4340ed 3422=item Recursive inheritance detected while looking for method %s</