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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
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18The majority of messages from the first three classifications above
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 to
50check the return value of your socket() call? See L<perlfunc/accept>.
33633739 51
6df41af2 52=item Allocation too large: %lx
a0d0e21e 53
6df41af2 54(X) You can't allocate more than 64K on an MS-DOS machine.
a0d0e21e 55
f61d411c 56=item '!' allowed only after types %s
ef54e1a4 57
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58(F) The '!' is allowed in pack() and unpack() only after certain types.
59See L<perlfunc/pack>.
ef54e1a4 60
6df41af2 61=item Ambiguous call resolved as CORE::%s(), qualify as such or use &
43192e07 62
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63(W ambiguous) A subroutine you have declared has the same name as a Perl
64keyword, and you have used the name without qualification for calling one or
65the other. Perl decided to call the builtin because the subroutine is not
66imported.
43192e07 67
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68To force interpretation as a subroutine call, either put an ampersand
69before the subroutine name, or qualify the name with its package.
70Alternatively, you can import the subroutine (or pretend that it's
71imported with the C<use subs> pragma).
43192e07 72
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73To silently interpret it as the Perl operator, use the C<CORE::> prefix
74on the operator (e.g. C<CORE::log($x)>) or by declaring the subroutine
75to be an object method (see L<perlsub/"Subroutine Attributes">
76or L<attributes>).
43192e07 77
6df41af2 78=item Ambiguous use of %s resolved as %s
43192e07 79
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80(W ambiguous)(S) You said something that may not be interpreted the way
81you thought. Normally it's pretty easy to disambiguate it by supplying
82a missing quote, operator, parenthesis pair or declaration.
a0d0e21e 83
6df41af2 84=item '|' and '<' may not both be specified on command line
a0d0e21e 85
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86(F) An error peculiar to VMS. Perl does its own command line redirection, and
87found that STDIN was a pipe, and that you also tried to redirect STDIN using
88'<'. Only one STDIN stream to a customer, please.
c9f97d15 89
6df41af2 90=item '|' and '>' may not both be specified on command line
1028017a 91
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92(F) An error peculiar to VMS. Perl does its own command line redirection, and
93thinks you tried to redirect stdout both to a file and into a pipe to another
94command. You need to choose one or the other, though nothing's stopping you
95from piping into a program or Perl script which 'splits' output into two
96streams, such as
1028017a 97
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98 open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
99 while (<STDIN>) {
100 print;
101 print OUT;
102 }
103 close OUT;
c9f97d15 104
6df41af2 105=item Applying %s to %s will act on scalar(%s)
eb6e2d6f 106
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107(W misc) The pattern match (//), substitution (s///), and transliteration
108(tr///) operators work on scalar values. If you apply one of them to an array
109or a hash, it will convert the array or hash to a scalar value -- the length
110of an array, or the population info of a hash -- and then work on that scalar
111value. This is probably not what you meant to do. See L<perlfunc/grep> and
112L<perlfunc/map> for alternatives.
eb6e2d6f 113
6df41af2 114=item Args must match #! line
a0d0e21e 115
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116(F) The setuid emulator requires that the arguments Perl was invoked
117with match the arguments specified on the #! line. Since some systems
118impose a one-argument limit on the #! line, try combining switches;
119for example, turn C<-w -U> into C<-wU>.
a0d0e21e 120
6df41af2 121=item Arg too short for msgsnd
76cd736e 122
6df41af2 123(F) msgsnd() requires a string at least as long as sizeof(long).
76cd736e 124
8ea97a1e 125=item %s argument is not a HASH or ARRAY element
a0d0e21e 126
8ea97a1e 127(F) The argument to exists() must be a hash or array element, such as:
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128
129 $foo{$bar}
cb4f522a 130 $ref->{"susie"}[12]
a0d0e21e 131
8ea97a1e 132=item %s argument is not a HASH or ARRAY element or slice
5f05dabc 133
8ea97a1e 134(F) The argument to delete() must be either a hash or array element, such as:
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135
136 $foo{$bar}
cb4f522a 137 $ref->{"susie"}[12]
5f05dabc 138
8ea97a1e 139or a hash or array slice, such as:
5f05dabc 140
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141 @foo[$bar, $baz, $xyzzy]
142 @{$ref->[12]}{"susie", "queue"}
5315574d 143
6df41af2 144=item %s argument is not a subroutine name
a0d0e21e 145
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146(F) The argument to exists() for C<exists &sub> must be a subroutine
147name, and not a subroutine call. C<exists &sub()> will generate this error.
a0d0e21e 148
f86702cc 149=item Argument "%s" isn't numeric%s
a0d0e21e 150
e476b1b5 151(W numeric) The indicated string was fed as an argument to an operator that
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152expected a numeric value instead. If you're fortunate the message will
153identify which operator was so unfortunate.
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154
155=item Array @%s missing the @ in argument %d of %s()
156
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157(D deprecated) Really old Perl let you omit the @ on array names in some
158spots. This is now heavily deprecated.
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159
160=item assertion botched: %s
161
162(P) The malloc package that comes with Perl had an internal failure.
163
164=item Assertion failed: file "%s"
165
166(P) A general assertion failed. The file in question must be examined.
167
168=item Assignment to both a list and a scalar
169
170(F) If you assign to a conditional operator, the 2nd and 3rd arguments
171must either both be scalars or both be lists. Otherwise Perl won't
172know which context to supply to the right side.
173
174=item Attempt to free non-arena SV: 0x%lx
175
e476b1b5 176(P internal) All SV objects are supposed to be allocated from arenas that will
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177be garbage collected on exit. An SV was discovered to be outside any of those
178arenas.
a0d0e21e 179
54310121 180=item Attempt to free nonexistent shared string
bbce6d69 181
e476b1b5 182(P internal) Perl maintains a reference counted internal table of strings to
bbce6d69 183optimize the storage and access of hash keys and other strings. This
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184indicates someone tried to decrement the reference count of a string that can
185no longer be found in the table.
bbce6d69 186
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187=item Attempt to free temp prematurely
188
e476b1b5 189(W debugging) Mortalized values are supposed to be freed by the free_tmps()
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190routine. This indicates that something else is freeing the SV before the
191free_tmps() routine gets a chance, which means that the free_tmps() routine
192will be freeing an unreferenced scalar when it does try to free it.
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193
194=item Attempt to free unreferenced glob pointers
195
e476b1b5 196(P internal) The reference counts got screwed up on symbol aliases.
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197
198=item Attempt to free unreferenced scalar
199
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200(W internal) Perl went to decrement the reference count of a scalar to see if
201it would go to 0, and discovered that it had already gone to 0 earlier, and
202should have been freed, and in fact, probably was freed. This could indicate
203that SvREFCNT_dec() was called too many times, or that SvREFCNT_inc() was
204called too few times, or that the SV was mortalized when it shouldn't have
205been, or that memory has been corrupted.
a0d0e21e 206
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207=item Attempt to join self
208
209(F) You tried to join a thread from within itself, which is an
210impossible task. You may be joining the wrong thread, or you may
211need to move the join() to some other thread.
212
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213=item Attempt to pack pointer to temporary value
214
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215(W pack) You tried to pass a temporary value (like the result of a function,
216or a computed expression) to the "p" pack() template. This means the result
217contains a pointer to a location that could become invalid anytime, even
218before the end of the current statement. Use literals or global values as
219arguments to the "p" pack() template to avoid this warning.
84902520 220
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221=item Attempt to use reference as lvalue in substr
222
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223(W substr) You supplied a reference as the first argument to substr() used as
224an lvalue, which is pretty strange. Perhaps you forgot to dereference it
225first. See L<perlfunc/substr>.
b7a902f4 226
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227=item Bad arg length for %s, is %d, should be %d
228
229(F) You passed a buffer of the wrong size to one of msgctl(), semctl() or
2ba9eb46 230shmctl(). In C parlance, the correct sizes are, respectively,
5f05dabc 231S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and
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232S<sizeof(struct shmid_ds *)>.
233
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234=item Bad evalled substitution pattern
235
236(F) You've used the /e switch to evaluate the replacement for a
237substitution, but perl found a syntax error in the code to evaluate,
238most likely an unexpected right brace '}'.
239
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240=item Bad filehandle: %s
241
242(F) A symbol was passed to something wanting a filehandle, but the symbol
243has no filehandle associated with it. Perhaps you didn't do an open(), or
244did it in another package.
245
246=item Bad free() ignored
247
e476b1b5 248(S malloc) An internal routine called free() on something that had never been
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249malloc()ed in the first place. Mandatory, but can be disabled by setting
250environment variable C<PERL_BADFREE> to 1.
33c8a3fe 251
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252This message can be quite often seen with DB_File on systems with "hard"
253dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB> which
254is left unnoticed if C<DB> uses I<forgiving> system malloc().
a0d0e21e 255
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256=item Bad hash
257
258(P) One of the internal hash routines was passed a null HV pointer.
259
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260=item Bad index while coercing array into hash
261
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262(F) The index looked up in the hash found as the 0'th element of a
263pseudo-hash is not legal. Index values must be at 1 or greater.
264See L<perlref>.
57079c46 265
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266=item Badly placed ()'s
267
268(A) You've accidentally run your script through B<csh> instead
269of Perl. Check the #! line, or manually feed your script into
270Perl yourself.
271
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272=item Bad name after %s::
273
274(F) You started to name a symbol by using a package prefix, and then didn't
275finish the symbol. In particular, you can't interpolate outside of quotes,
276so
277
278 $var = 'myvar';
279 $sym = mypack::$var;
280
281is not the same as
282
283 $var = 'myvar';
284 $sym = "mypack::$var";
285
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286=item Bad realloc() ignored
287
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288(S malloc) An internal routine called realloc() on something that had never
289been malloc()ed in the first place. Mandatory, but can be disabled by setting
290environment variable C<PERL_BADFREE> to 1.
4ad56ec9 291
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292=item Bad symbol for array
293
294(P) An internal request asked to add an array entry to something that
295wasn't a symbol table entry.
296
297=item Bad symbol for filehandle
298
299(P) An internal request asked to add a filehandle entry to something that
300wasn't a symbol table entry.
301
302=item Bad symbol for hash
303
304(P) An internal request asked to add a hash entry to something that
305wasn't a symbol table entry.
306
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307=item Bareword found in conditional
308
e476b1b5 309(W bareword) The compiler found a bareword where it expected a conditional,
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310which often indicates that an || or && was parsed as part of the last argument
311of the previous construct, for example:
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312
313 open FOO || die;
314
315It may also indicate a misspelled constant that has been interpreted
316as a bareword:
317
318 use constant TYPO => 1;
319 if (TYOP) { print "foo" }
320
321The C<strict> pragma is useful in avoiding such errors.
322
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323=item Bareword "%s" not allowed while "strict subs" in use
324
325(F) With "strict subs" in use, a bareword is only allowed as a
326subroutine identifier, in curly brackets or to the left of the "=>" symbol.
327Perhaps you need to predeclare a subroutine?
328
329=item Bareword "%s" refers to nonexistent package
330
331(W bareword) You used a qualified bareword of the form C<Foo::>, but
332the compiler saw no other uses of that namespace before that point.
333Perhaps you need to predeclare a package?
334
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335=item BEGIN failed--compilation aborted
336
337(F) An untrapped exception was raised while executing a BEGIN subroutine.
338Compilation stops immediately and the interpreter is exited.
339
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340=item BEGIN not safe after errors--compilation aborted
341
342(F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which
343implies a C<BEGIN {}>) after one or more compilation errors had
344already occurred. Since the intended environment for the C<BEGIN {}>
345could not be guaranteed (due to the errors), and since subsequent code
346likely depends on its correct operation, Perl just gave up.
347
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348=item \1 better written as $1
349
350(W syntax) Outside of patterns, backreferences live on as variables. The use
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351of backslashes is grandfathered on the right-hand side of a substitution, but
352stylistically it's better to use the variable form because other Perl
353programmers will expect it, and it works better if there are more than 9
354backreferences.
6df41af2 355
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356=item Binary number > 0b11111111111111111111111111111111 non-portable
357
e476b1b5 358(W portable) The binary number you specified is larger than 2**32-1
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359(4294967295) and therefore non-portable between systems. See
360L<perlport> for more on portability concerns.
252aa082 361
69282e91 362=item bind() on closed socket %s
a0d0e21e 363
e476b1b5 364(W closed) You tried to do a bind on a closed socket. Did you forget to check
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365the return value of your socket() call? See L<perlfunc/bind>.
366
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367=item Bit vector size > 32 non-portable
368
e476b1b5 369(W portable) Using bit vector sizes larger than 32 is non-portable.
c5a0f51a 370
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371=item Bizarre copy of %s in %s
372
373(P) Perl detected an attempt to copy an internal value that is not copiable.
374
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375=item B<-P> not allowed for setuid/setgid script
376
377(F) The script would have to be opened by the C preprocessor by name,
378which provides a race condition that breaks security.
379
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380=item Buffer overflow in prime_env_iter: %s
381
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382(W internal) A warning peculiar to VMS. While Perl was preparing to iterate
383over %ENV, it encountered a logical name or symbol definition which was too
384long, so it was truncated to the string shown.
f675dbe5 385
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386=item Callback called exit
387
4929bf7b 388(F) A subroutine invoked from an external package via call_sv()
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389exited by calling exit.
390
6df41af2 391=item %s() called too early to check prototype
f675dbe5 392
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393(W prototype) You've called a function that has a prototype before the parser
394saw a definition or declaration for it, and Perl could not check that the call
6df41af2 395conforms to the prototype. You need to either add an early prototype
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396declaration for the subroutine in question, or move the subroutine definition
397ahead of the call to get proper prototype checking. Alternatively, if you are
398certain that you're calling the function correctly, you may put an ampersand
399before the name to avoid the warning. See L<perlsub>.
f675dbe5 400
6df41af2 401=item / cannot take a count
a0d0e21e 402
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403(F) You had an unpack template indicating a counted-length string,
404but you have also specified an explicit size for the string.
405See L<perlfunc/pack>.
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406
407=item Can't bless non-reference value
408
409(F) Only hard references may be blessed. This is how Perl "enforces"
410encapsulation of objects. See L<perlobj>.
411
412=item Can't break at that line
413
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414(S internal) A warning intended to only be printed while running within the
415debugger, indicating the line number specified wasn't the location of a
416statement that could be stopped at.
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417
418=item Can't call method "%s" in empty package "%s"
419
420(F) You called a method correctly, and it correctly indicated a package
421functioning as a class, but that package doesn't have ANYTHING defined
422in it, let alone methods. See L<perlobj>.
423
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424=item Can't call method "%s" on an undefined value
425
426(F) You used the syntax of a method call, but the slot filled by the
427object reference or package name contains an undefined value.
428Something like this will reproduce the error:
429
430 $BADREF = undef;
431 process $BADREF 1,2,3;
432 $BADREF->process(1,2,3);
433
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434=item Can't call method "%s" on unblessed reference
435
54310121 436(F) A method call must know in what package it's supposed to run. It
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437ordinarily finds this out from the object reference you supply, but
438you didn't supply an object reference in this case. A reference isn't
439an object reference until it has been blessed. See L<perlobj>.
440
441=item Can't call method "%s" without a package or object reference
442
443(F) You used the syntax of a method call, but the slot filled by the
444object reference or package name contains an expression that returns
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445a defined value which is neither an object reference nor a package name.
446Something like this will reproduce the error:
447
448 $BADREF = 42;
449 process $BADREF 1,2,3;
450 $BADREF->process(1,2,3);
451
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452=item Can't chdir to %s
453
454(F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory
455that you can chdir to, possibly because it doesn't exist.
456
0545a864 457=item Can't check filesystem of script "%s" for nosuid
104d25b7 458
e688b231 459(P) For some reason you can't check the filesystem of the script for nosuid.
104d25b7 460
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461=item Can't coerce array into hash
462
463(F) You used an array where a hash was expected, but the array has no
464information on how to map from keys to array indices. You can do that
465only with arrays that have a hash reference at index 0.
466
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467=item Can't coerce %s to integer in %s
468
469(F) Certain types of SVs, in particular real symbol table entries
55497cff 470(typeglobs), can't be forced to stop being what they are. So you can't
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471say things like:
472
473 *foo += 1;
474
475You CAN say
476
477 $foo = *foo;
478 $foo += 1;
479
480but then $foo no longer contains a glob.
481
482=item Can't coerce %s to number in %s
483
484(F) Certain types of SVs, in particular real symbol table entries
55497cff 485(typeglobs), can't be forced to stop being what they are.
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486
487=item Can't coerce %s to string in %s
488
489(F) Certain types of SVs, in particular real symbol table entries
55497cff 490(typeglobs), can't be forced to stop being what they are.
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491
492=item Can't create pipe mailbox
493
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494(P) An error peculiar to VMS. The process is suffering from exhausted quotas
495or other plumbing problems.
a0d0e21e 496
eb64745e 497=item Can't declare class for non-scalar %s in "%s"
a0d0e21e 498
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499(S) Currently, only scalar variables can declared with a specific class
500qualifier in a "my" or "our" declaration. The semantics may be extended
501for other types of variables in future.
502
503=item Can't declare %s in "%s"
504
505(F) Only scalar, array, and hash variables may be declared as "my" or
506"our" variables. They must have ordinary identifiers as names.
a0d0e21e 507
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508=item Can't do inplace edit: %s is not a regular file
509
510(S inplace) You tried to use the B<-i> switch on a special file, such as a file in
511/dev, or a FIFO. The file was ignored.
512
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513=item Can't do inplace edit on %s: %s
514
e476b1b5 515(S inplace) The creation of the new file failed for the indicated reason.
a0d0e21e 516
54310121 517=item Can't do inplace edit without backup
a0d0e21e 518
54310121 519(F) You're on a system such as MS-DOS that gets confused if you try reading
3fe9a6f1 520from a deleted (but still opened) file. You have to say C<-i.bak>, or some
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521such.
522
10f9c03d 523=item Can't do inplace edit: %s would not be unique
a0d0e21e 524
e476b1b5 525(S inplace) Your filesystem does not support filenames longer than 14
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526characters and Perl was unable to create a unique filename during
527inplace editing with the B<-i> switch. The file was ignored.
a0d0e21e 528
6df41af2 529=item Can't do {n,m} with n > m
a0d0e21e 530
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531(F) Minima must be less than or equal to maxima. If you really want
532your regexp to match something 0 times, just put {0}. See L<perlre>.
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533
534=item Can't do setegid!
535
536(P) The setegid() call failed for some reason in the setuid emulator
537of suidperl.
538
539=item Can't do seteuid!
540
541(P) The setuid emulator of suidperl failed for some reason.
542
543=item Can't do setuid
544
545(F) This typically means that ordinary perl tried to exec suidperl to
546do setuid emulation, but couldn't exec it. It looks for a name of the
547form sperl5.000 in the same directory that the perl executable resides
548under the name perl5.000, typically /usr/local/bin on Unix machines.
549If the file is there, check the execute permissions. If it isn't, ask
550your sysadmin why he and/or she removed it.
551
552=item Can't do waitpid with flags
553
554(F) This machine doesn't have either waitpid() or wait4(), so only waitpid()
555without flags is emulated.
556
a0d0e21e
LW
557=item Can't emulate -%s on #! line
558
559(F) The #! line specifies a switch that doesn't make sense at this point.
560For example, it'd be kind of silly to put a B<-x> on the #! line.
561
562=item Can't exec "%s": %s
563
e476b1b5 564(W exec) An system(), exec(), or piped open call could not execute the named
a0d0e21e 565program for the indicated reason. Typical reasons include: the permissions
75b44862
GS
566were wrong on the file, the file wasn't found in C<$ENV{PATH}>, the executable
567in question was compiled for another architecture, or the #! line in a script
568points to an interpreter that can't be run for similar reasons. (Or maybe
569your system doesn't support #! at all.)
a0d0e21e
LW
570
571=item Can't exec %s
572
573(F) Perl was trying to execute the indicated program for you because that's
574what the #! line said. If that's not what you wanted, you may need to
575mention "perl" on the #! line somewhere.
576
577=item Can't execute %s
578
2a92aaa0
GS
579(F) You used the B<-S> switch, but the copies of the script to execute found
580in the PATH did not have correct permissions.
581
6df41af2 582=item Can't find an opnumber for "%s"
2a92aaa0 583
6df41af2
GS
584(F) A string of a form C<CORE::word> was given to prototype(), but
585there is no builtin with the name C<word>.
586
587=item Can't find label %s
588
589(F) You said to goto a label that isn't mentioned anywhere that it's possible
590for us to go to. See L<perlfunc/goto>.
2a92aaa0
GS
591
592=item Can't find %s on PATH
593
a0d0e21e 594(F) You used the B<-S> switch, but the script to execute could not be found
2a92aaa0 595in the PATH.
a0d0e21e 596
6df41af2 597=item Can't find %s on PATH, '.' not in PATH
a0d0e21e 598
6df41af2
GS
599(F) You used the B<-S> switch, but the script to execute could not be found
600in the PATH, or at least not with the correct permissions. The script
601exists in the current directory, but PATH prohibits running it.
a0d0e21e
LW
602
603=item Can't find string terminator %s anywhere before EOF
604
605(F) Perl strings can stretch over multiple lines. This message means that
5f05dabc 606the closing delimiter was omitted. Because bracketed quotes count nesting
a0d0e21e
LW
607levels, the following is missing its final parenthesis:
608
fb73857a
PP
609 print q(The character '(' starts a side comment.);
610
611If you're getting this error from a here-document, you may have
612included unseen whitespace before or after your closing tag. A good
613programmer's editor will have a way to help you find these characters.
a0d0e21e
LW
614
615=item Can't fork
616
617(F) A fatal error occurred while trying to fork while opening a pipeline.
618
748a9306
LW
619=item Can't get filespec - stale stat buffer?
620
621(S) A warning peculiar to VMS. This arises because of the difference between
622access checks under VMS and under the Unix model Perl assumes. Under VMS,
623access checks are done by filename, rather than by bits in the stat buffer, so
624that ACLs and other protections can be taken into account. Unfortunately, Perl
625assumes that the stat buffer contains all the necessary information, and passes
626it, instead of the filespec, to the access checking routine. It will try to
627retrieve the filespec using the device name and FID present in the stat buffer,
628but this works only if you haven't made a subsequent call to the CRTL stat()
5f05dabc 629routine, because the device name is overwritten with each call. If this warning
748a9306
LW
630appears, the name lookup failed, and the access checking routine gave up and
631returned FALSE, just to be conservative. (Note: The access checking routine
632knows about the Perl C<stat> operator and file tests, so you shouldn't ever
633see this warning in response to a Perl command; it arises only if some internal
634code takes stat buffers lightly.)
635
a0d0e21e
LW
636=item Can't get pipe mailbox device name
637
748a9306
LW
638(P) An error peculiar to VMS. After creating a mailbox to act as a pipe, Perl
639can't retrieve its name for later use.
a0d0e21e
LW
640
641=item Can't get SYSGEN parameter value for MAXBUF
642
748a9306
LW
643(P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
644mailbox buffers to be, and didn't get an answer.
a0d0e21e 645
6df41af2 646=item Can't "goto" into the middle of a foreach loop
a0d0e21e 647
6df41af2
GS
648(F) A "goto" statement was executed to jump into the middle of a
649foreach loop. You can't get there from here. See L<perlfunc/goto>.
650
651=item Can't "goto" out of a pseudo block
652
653(F) A "goto" statement was executed to jump out of what might look
654like a block, except that it isn't a proper block. This usually
655occurs if you tried to jump out of a sort() block or subroutine, which
656is a no-no. See L<perlfunc/goto>.
a0d0e21e 657
b150fb22
RH
658=item Can't goto subroutine from an eval-string
659
660(F) The "goto subroutine" call can't be used to jump out of an eval "string".
661(You can use it to jump out of an eval {BLOCK}, but you probably don't want to.)
662
6df41af2
GS
663=item Can't goto subroutine outside a subroutine
664
665(F) The deeply magical "goto subroutine" call can only replace one subroutine
666call for another. It can't manufacture one out of whole cloth. In general
667you should be calling it out of only an AUTOLOAD routine anyway. See
668L<perlfunc/goto>.
669
0b5b802d
GS
670=item Can't ignore signal CHLD, forcing to default
671
e476b1b5 672(W signal) Perl has detected that it is being run with the SIGCHLD signal
75b44862
GS
673(sometimes known as SIGCLD) disabled. Since disabling this signal will
674interfere with proper determination of exit status of child processes, Perl
675has reset the signal to its default value. This situation typically indicates
676that the parent program under which Perl may be running (e.g. cron) is being
677very careless.
0b5b802d 678
6df41af2 679=item Can't "last" outside a loop block
4633a7c4 680
6df41af2
GS
681(F) A "last" statement was executed to break out of the current block,
682except that there's this itty bitty problem called there isn't a
683current block. Note that an "if" or "else" block doesn't count as a
684"loopish" block, as doesn't a block given to sort(), map() or grep().
685You can usually double the curlies to get the same effect though,
686because the inner curlies will be considered a block that loops once.
687See L<perlfunc/last>.
4633a7c4 688
748a9306
LW
689=item Can't localize lexical variable %s
690
2ba9eb46 691(F) You used local on a variable name that was previously declared as a
748a9306
LW
692lexical variable using "my". This is not allowed. If you want to
693localize a package variable of the same name, qualify it with the
694package name.
695
0ebe0038
SM
696=item Can't localize pseudo-hash element
697
c47ff5f1 698(F) You said something like C<< local $ar->{'key'} >>, where $ar is
0ebe0038
SM
699a reference to a pseudo-hash. That hasn't been implemented yet, but
700you can get a similar effect by localizing the corresponding array
c47ff5f1 701element directly -- C<< local $ar->[$ar->[0]{'key'}] >>.
0ebe0038 702
6df41af2 703=item Can't localize through a reference
4727527e 704
6df41af2
GS
705(F) You said something like C<local $$ref>, which Perl can't currently
706handle, because when it goes to restore the old value of whatever $ref
707pointed to after the scope of the local() is finished, it can't be
708sure that $ref will still be a reference.
4727527e 709
ec889f3a
GS
710=item Can't locate %s
711
712(F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be
713found. Perl looks for the file in all the locations mentioned in @INC,
714unless the file name included the full path to the file. Perhaps you need
715to set the PERL5LIB or PERL5OPT environment variable to say where the extra
716library is, or maybe the script needs to add the library name to @INC. Or
717maybe you just misspelled the name of the file. See L<perlfunc/require>
718and L<lib>.
a0d0e21e 719
6df41af2
GS
720=item Can't locate auto/%s.al in @INC
721
722(F) A function (or method) was called in a package which allows autoload,
723but there is no function to autoload. Most probable causes are a misprint
724in a function/method name or a failure to C<AutoSplit> the file, say, by
725doing C<make install>.
726
a0d0e21e
LW
727=item Can't locate object method "%s" via package "%s"
728
729(F) You called a method correctly, and it correctly indicated a package
730functioning as a class, but that package doesn't define that particular
2ba9eb46 731method, nor does any of its base classes. See L<perlobj>.
a0d0e21e
LW
732
733=item Can't locate package %s for @%s::ISA
734
75b44862
GS
735(W syntax) The @ISA array contained the name of another package that doesn't
736seem to exist.
a0d0e21e 737
3e3baf6d
TB
738=item Can't make list assignment to \%ENV on this system
739
740(F) List assignment to %ENV is not supported on some systems, notably VMS.
741
a0d0e21e
LW
742=item Can't modify %s in %s
743
744(F) You aren't allowed to assign to the item indicated, or otherwise try to
5f05dabc 745change it, such as with an auto-increment.
a0d0e21e 746
54310121 747=item Can't modify nonexistent substring
a0d0e21e
LW
748
749(P) The internal routine that does assignment to a substr() was handed
750a NULL.
751
6df41af2
GS
752=item Can't modify non-lvalue subroutine call
753
754(F) Subroutines meant to be used in lvalue context should be declared as
755such, see L<perlsub/"Lvalue subroutines">.
756
5f05dabc 757=item Can't msgrcv to read-only var
a0d0e21e 758
5f05dabc 759(F) The target of a msgrcv must be modifiable to be used as a receive
a0d0e21e
LW
760buffer.
761
6df41af2
GS
762=item Can't "next" outside a loop block
763
764(F) A "next" statement was executed to reiterate the current block, but
765there isn't a current block. Note that an "if" or "else" block doesn't
766count as a "loopish" block, as doesn't a block given to sort(), map()
767or grep(). You can usually double the curlies to get the same effect
768though, because the inner curlies will be considered a block that
769loops once. See L<perlfunc/next>.
770
a0d0e21e
LW
771=item Can't open %s: %s
772
c47ff5f1 773(S inplace) The implicit opening of a file through use of the C<< <> >>
08e9d68e
DD
774filehandle, either implicitly under the C<-n> or C<-p> command-line
775switches, or explicitly, failed for the indicated reason. Usually this
776is because you don't have read permission for a file which you named
777on the command line.
a0d0e21e
LW
778
779=item Can't open bidirectional pipe
780
75b44862
GS
781(W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported. You
782can try any of several modules in the Perl library to do this, such as
783IPC::Open2. Alternately, direct the pipe's output to a file using ">", and
784then read it in under a different file handle.
a0d0e21e 785
748a9306
LW
786=item Can't open error file %s as stderr
787
788(F) An error peculiar to VMS. Perl does its own command line redirection, and
c47ff5f1 789couldn't open the file specified after '2>' or '2>>' on the
8b1a09fc 790command line for writing.
748a9306
LW
791
792=item Can't open input file %s as stdin
793
794(F) An error peculiar to VMS. Perl does its own command line redirection, and
c47ff5f1 795couldn't open the file specified after '<' on the command line for reading.
748a9306
LW
796
797=item Can't open output file %s as stdout
798
799(F) An error peculiar to VMS. Perl does its own command line redirection, and
c47ff5f1 800couldn't open the file specified after '>' or '>>' on the command
8b1a09fc 801line for writing.
748a9306
LW
802
803=item Can't open output pipe (name: %s)
804
805(P) An error peculiar to VMS. Perl does its own command line redirection, and
806couldn't open the pipe into which to send data destined for stdout.
807
a0d0e21e
LW
808=item Can't open perl script "%s": %s
809
810(F) The script you specified can't be opened for the indicated reason.
811
6df41af2
GS
812=item Can't read CRTL environ
813
814(S) A warning peculiar to VMS. Perl tried to read an element of %ENV
815from the CRTL's internal environment array and discovered the array was
816missing. You need to figure out where your CRTL misplaced its environ
817or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not searched.
818
7bac28a0
PP
819=item Can't redefine active sort subroutine %s
820
821(F) Perl optimizes the internal handling of sort subroutines and keeps
822pointers into them. You tried to redefine one such sort subroutine when it
823was currently active, which is not allowed. If you really want to do
824this, you should write C<sort { &func } @x> instead of C<sort func @x>.
825
6df41af2
GS
826=item Can't "redo" outside a loop block
827
828(F) A "redo" statement was executed to restart the current block, but
829there isn't a current block. Note that an "if" or "else" block doesn't
830count as a "loopish" block, as doesn't a block given to sort(), map()
831or grep(). You can usually double the curlies to get the same effect
832though, because the inner curlies will be considered a block that
833loops once. See L<perlfunc/redo>.
834
10f9c03d
CK
835=item Can't remove %s: %s, skipping file
836
e476b1b5 837(S inplace) You requested an inplace edit without creating a backup file. Perl
10f9c03d
CK
838was unable to remove the original file to replace it with the modified
839file. The file was left unmodified.
840
a0d0e21e
LW
841=item Can't rename %s to %s: %s, skipping file
842
e476b1b5 843(S inplace) The rename done by the B<-i> switch failed for some reason,
10f9c03d 844probably because you don't have write permission to the directory.
a0d0e21e 845
748a9306
LW
846=item Can't reopen input pipe (name: %s) in binary mode
847
848(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried to
849reopen it to accept binary data. Alas, it failed.
850
6df41af2
GS
851=item Can't resolve method `%s' overloading `%s' in package `%s'
852
853(F|P) Error resolving overloading specified by a method name (as
854opposed to a subroutine reference): no such method callable via the
855package. If method name is C<???>, this is an internal error.
856
a0d0e21e
LW
857=item Can't reswap uid and euid
858
859(P) The setreuid() call failed for some reason in the setuid emulator
860of suidperl.
861
cd06dffe
GS
862=item Can't return %s from lvalue subroutine
863
864(F) Perl detected an attempt to return illegal lvalues (such
865as temporary or readonly values) from a subroutine used as an lvalue.
866This is not allowed.
867
6df41af2
GS
868=item Can't return outside a subroutine
869
870(F) The return statement was executed in mainline code, that is, where
871there was no subroutine call to return out of. See L<perlsub>.
872
a0d0e21e
LW
873=item Can't stat script "%s"
874
875(P) For some reason you can't fstat() the script even though you have
876it open already. Bizarre.
877
878=item Can't swap uid and euid
879
880(P) The setreuid() call failed for some reason in the setuid emulator
881of suidperl.
882
883=item Can't take log of %g
884
fb73857a
PP
885(F) For ordinary real numbers, you can't take the logarithm of a
886negative number or zero. There's a Math::Complex package that comes
887standard with Perl, though, if you really want to do that for
888the negative numbers.
a0d0e21e
LW
889
890=item Can't take sqrt of %g
891
892(F) For ordinary real numbers, you can't take the square root of a
fb73857a
PP
893negative number. There's a Math::Complex package that comes standard
894with Perl, though, if you really want to do that.
a0d0e21e
LW
895
896=item Can't undef active subroutine
897
898(F) You can't undefine a routine that's currently running. You can,
899however, redefine it while it's running, and you can even undef the
900redefined subroutine while the old routine is running. Go figure.
901
902=item Can't unshift
903
904(F) You tried to unshift an "unreal" array that can't be unshifted, such
905as the main Perl stack.
906
907=item Can't upgrade that kind of scalar
908
909(P) The internal sv_upgrade routine adds "members" to an SV, making
910it into a more specialized kind of SV. The top several SV types are
911so specialized, however, that they cannot be interconverted. This
912message indicates that such a conversion was attempted.
913
914=item Can't upgrade to undef
915
916(P) The undefined SV is the bottom of the totem pole, in the scheme
917of upgradability. Upgrading to undef indicates an error in the
918code calling sv_upgrade.
919
6df41af2
GS
920=item Can't use an undefined value as %s reference
921
922(F) A value used as either a hard reference or a symbolic reference must
923be a defined value. This helps to delurk some insidious errors.
924
925=item Can't use bareword ("%s") as %s ref while "strict refs" in use
926
927(F) Only hard references are allowed by "strict refs". Symbolic references
928are disallowed. See L<perlref>.
929
1d2dff63
GS
930=item Can't use %%! because Errno.pm is not available
931
932(F) The first time the %! hash is used, perl automatically loads the
933Errno.pm module. The Errno module is expected to tie the %! hash to
934provide symbolic names for C<$!> errno values.
935
6df41af2
GS
936=item Can't use %s for loop variable
937
938(F) Only a simple scalar variable may be used as a loop variable on a foreach.
939
940=item Can't use global %s in "my"
941
942(F) You tried to declare a magical variable as a lexical variable. This is
943not allowed, because the magic can be tied to only one location (namely
944the global variable) and it would be incredibly confusing to have
945variables in your program that looked like magical variables but
946weren't.
947
c07a80fd
PP
948=item Can't use "my %s" in sort comparison
949
950(F) The global variables $a and $b are reserved for sort comparisons.
c47ff5f1 951You mentioned $a or $b in the same line as the <=> or cmp operator,
c07a80fd
PP
952and the variable had earlier been declared as a lexical variable.
953Either qualify the sort variable with the package name, or rename the
954lexical variable.
955
a0d0e21e
LW
956=item Can't use %s ref as %s ref
957
958(F) You've mixed up your reference types. You have to dereference a
959reference of the type needed. You can use the ref() function to
960test the type of the reference, if need be.
961
748a9306 962=item Can't use string ("%s") as %s ref while "strict refs" in use
a0d0e21e
LW
963
964(F) Only hard references are allowed by "strict refs". Symbolic references
965are disallowed. See L<perlref>.
966
748a9306
LW
967=item Can't use subscript on %s
968
969(F) The compiler tried to interpret a bracketed expression as a
970subscript. But to the left of the brackets was an expression that
971didn't look like an array reference, or anything else subscriptable.
972
6df41af2
GS
973=item Can't use \%c to mean $%c in expression
974
75b44862
GS
975(W syntax) In an ordinary expression, backslash is a unary operator that
976creates a reference to its argument. The use of backslash to indicate a
977backreference to a matched substring is valid only as part of a regular
978expression pattern. Trying to do this in ordinary Perl code produces a value
979that prints out looking like SCALAR(0xdecaf). Use the $1 form instead.
6df41af2 980
810b8aa5
GS
981=item Can't weaken a nonreference
982
983(F) You attempted to weaken something that was not a reference. Only
984references can be weakened.
985
5f05dabc 986=item Can't x= to read-only value
a0d0e21e
LW
987
988(F) You tried to repeat a constant value (often the undefined value) with
989an assignment operator, which implies modifying the value itself.
990Perhaps you need to copy the value to a temporary, and repeat that.
991
b8c5462f
JH
992=item Character class syntax [%s] belongs inside character classes
993
e476b1b5 994(W unsafe) The character class constructs [: :], [= =], and [. .] go
75b44862
GS
995I<inside> character classes, the [] are part of the construct, for example:
996/[012[:alpha:]345]/. Note that [= =] and [. .] are not currently implemented;
997they are simply placeholders for future extensions.
b8c5462f 998
644a2880 999=item Character class syntax [. .] is reserved for future extensions
4599a1de 1000
75b44862
GS
1001(W regexp) Within regular expression character classes ([]) the syntax
1002beginning with "[." and ending with ".]" is reserved for future extensions.
1003If you need to represent those character sequences inside a regular expression
1004character class, just quote the square brackets with the backslash: "\[." and
1005".\]".
4599a1de
JH
1006
1007=item Character class syntax [= =] is reserved for future extensions
1008
e476b1b5 1009(W regexp) Within regular expression character classes ([]) the syntax
4599a1de 1010beginning with "[=" and ending with "=]" is reserved for future extensions.
75b44862
GS
1011If you need to represent those character sequences inside a regular expression
1012character class, just quote the square brackets with the backslash: "\[=" and
1013"=\]".
4599a1de 1014
6df41af2
GS
1015=item Character class [:%s:] unknown
1016
1017(F) The class in the character class [: :] syntax is unknown.
1018See L<perlre>.
1019
5a211162 1020=item chmod() mode argument is missing initial 0
a0d0e21e 1021
e476b1b5 1022(W chmod) A novice will sometimes say
a0d0e21e
LW
1023
1024 chmod 777, $filename
1025
1026not realizing that 777 will be interpreted as a decimal number, equivalent
1027to 01411. Octal constants are introduced with a leading 0 in Perl, as in C.
1028
c47ff5f1 1029=item Close on unopened file <%s>
a0d0e21e 1030
e476b1b5 1031(W unopened) You tried to close a filehandle that was never opened.
a0d0e21e 1032
6df41af2
GS
1033=item %s: Command not found
1034
1035(A) You've accidentally run your script through B<csh> instead
1036of Perl. Check the #! line, or manually feed your script into
1037Perl yourself.
1038
7a2e2cd6
PP
1039=item Compilation failed in require
1040
1041(F) Perl could not compile a file specified in a C<require> statement.
1042Perl uses this generic message when none of the errors that it encountered
1043were severe enough to halt compilation immediately.
1044
c3464db5
DD
1045=item Complex regular subexpression recursion limit (%d) exceeded
1046
e476b1b5 1047(W regexp) The regular expression engine uses recursion in complex situations
75b44862
GS
1048where back-tracking is required. Recursion depth is limited to 32766, or
1049perhaps less in architectures where the stack cannot grow arbitrarily.
1050("Simple" and "medium" situations are handled without recursion and are not
1051subject to a limit.) Try shortening the string under examination; looping in
1052Perl code (e.g. with C<while>) rather than in the regular expression engine;
1053or rewriting the regular expression so that it is simpler or backtracks less.
1054(See L<perlbook> for information on I<Mastering Regular Expressions>.)
c3464db5 1055
69282e91 1056=item connect() on closed socket %s
a0d0e21e 1057
75b44862
GS
1058(W closed) You tried to do a connect on a closed socket. Did you forget to
1059check the return value of your socket() call? See L<perlfunc/connect>.
a0d0e21e 1060
6df41af2
GS
1061=item constant(%s): %s
1062
1063(F) The parser found inconsistencies either while attempting to define an
1064overloaded constant, or when trying to find the character name specified
1065in the C<\N{...}> escape. Perhaps you forgot to load the corresponding
1066C<overload> or C<charnames> pragma? See L<charnames> and L<overload>.
1067
779c5bc9
GS
1068=item Constant is not %s reference
1069
1070(F) A constant value (perhaps declared using the C<use constant> pragma)
1071is being dereferenced, but it amounts to the wrong type of reference. The
1072message indicates the type of reference that was expected. This usually
1073indicates a syntax error in dereferencing the constant value.
1074See L<perlsub/"Constant Functions"> and L<constant>.
1075
4cee8e80
CS
1076=item Constant subroutine %s redefined
1077
e476b1b5 1078(S|W redefine) You redefined a subroutine which had previously been eligible for
4cee8e80
CS
1079inlining. See L<perlsub/"Constant Functions"> for commentary and
1080workarounds.
1081
9607fc9c
PP
1082=item Constant subroutine %s undefined
1083
e476b1b5 1084(W misc) You undefined a subroutine which had previously been eligible for
75b44862 1085inlining. See L<perlsub/"Constant Functions"> for commentary and workarounds.
9607fc9c 1086
e7ea3e70
IZ
1087=item Copy method did not return a reference
1088
1089(F) The method which overloads "=" is buggy. See L<overload/Copy Constructor>.
1090
6798c92b
GS
1091=item CORE::%s is not a keyword
1092
1093(F) The CORE:: namespace is reserved for Perl keywords.
1094
a0d0e21e
LW
1095=item corrupted regexp pointers
1096
1097(P) The regular expression engine got confused by what the regular
1098expression compiler gave it.
1099
1100=item corrupted regexp program
1101
1102(P) The regular expression engine got passed a regexp program without
1103a valid magic number.
1104
6df41af2
GS
1105=item Corrupt malloc ptr 0x%lx at 0x%lx
1106
1107(P) The malloc package that comes with Perl had an internal failure.
1108
1109=item C<-p> destination: %s
1110
1111(F) An error occurred during the implicit output invoked by the C<-p>
1112command-line switch. (This output goes to STDOUT unless you've
1113redirected it with select().)
1114
1115=item C<-T> and C<-B> not implemented on filehandles
1116
1117(F) Perl can't peek at the stdio buffer of filehandles when it doesn't
1118know about your kind of stdio. You'll have to use a filename instead.
1119
a0d0e21e
LW
1120=item Deep recursion on subroutine "%s"
1121
e476b1b5 1122(W recursion) This subroutine has called itself (directly or indirectly) 100
3e3baf6d 1123times more than it has returned. This probably indicates an infinite
75b44862
GS
1124recursion, unless you're writing strange benchmark programs, in which case it
1125indicates something else.
a0d0e21e 1126
f10b0346 1127=item defined(@array) is deprecated
69794302 1128
e476b1b5 1129(D deprecated) defined() is not usually useful on arrays because it checks for an
69794302
MJD
1130undefined I<scalar> value. If you want to see if the array is empty,
1131just use C<if (@array) { # not empty }> for example.
1132
f10b0346 1133=item defined(%hash) is deprecated
69794302 1134
e476b1b5 1135(D deprecated) defined() is not usually useful on hashes because it checks for an
69794302
MJD
1136undefined I<scalar> value. If you want to see if the hash is empty,
1137just use C<if (%hash) { # not empty }> for example.
1138
fc36a67e
PP
1139=item Delimiter for here document is too long
1140
c47ff5f1 1141(F) In a here document construct like C<<<FOO>, the label
fc36a67e
PP
1142C<FOO> is too long for Perl to handle. You have to be seriously
1143twisted to write code that triggers this error.
1144
3cdd684c
TP
1145=item Did not produce a valid header
1146
1147See Server error.
1148
6df41af2
GS
1149=item %s did not return a true value
1150
1151(F) A required (or used) file must return a true value to indicate that
1152it compiled correctly and ran its initialization code correctly. It's
1153traditional to end such a file with a "1;", though any true value would
1154do. See L<perlfunc/require>.
1155
cc507455 1156=item (Did you mean &%s instead?)
4633a7c4
LW
1157
1158(W) You probably referred to an imported subroutine &FOO as $FOO or some such.
1159
cc507455 1160=item (Did you mean "local" instead of "our"?)
33633739 1161
e476b1b5 1162(W misc) Remember that "our" does not localize the declared global variable.
33633739
GS
1163You have declared it again in the same lexical scope, which seems superfluous.
1164
cc507455 1165=item (Did you mean $ or @ instead of %?)
a0d0e21e 1166
748a9306
LW
1167(W) You probably said %hash{$key} when you meant $hash{$key} or @hash{@keys}.
1168On the other hand, maybe you just meant %hash and got carried away.
1169
7e1af8bc 1170=item Died
5f05dabc
PP
1171
1172(F) You passed die() an empty string (the equivalent of C<die "">) or
1173you called it with no args and both C<$@> and C<$_> were empty.
1174
3cdd684c
TP
1175=item Document contains no data
1176
1177See Server error.
1178
a0d0e21e
LW
1179=item Don't know how to handle magic of type '%s'
1180
1181(P) The internal handling of magical variables has been cursed.
1182
1183=item do_study: out of memory
1184
1185(P) This should have been caught by safemalloc() instead.
1186
6df41af2
GS
1187=item (Do you need to predeclare %s?)
1188
1189(S) This is an educated guess made in conjunction with the message "%s
1190found where operator expected". It often means a subroutine or module
1191name is being referenced that hasn't been declared yet. This may be
1192because of ordering problems in your file, or because of a missing
1193"sub", "package", "require", or "use" statement. If you're
1194referencing something that isn't defined yet, you don't actually have
1195to define the subroutine or package before the current location. You
1196can use an empty "sub foo;" or "package FOO;" to enter a "forward"
1197declaration.
1198
a0d0e21e
LW
1199=item Duplicate free() ignored
1200
e476b1b5 1201(S malloc) An internal routine called free() on something that had already
a0d0e21e
LW
1202been freed.
1203
4633a7c4
LW
1204=item elseif should be elsif
1205
1206(S) There is no keyword "elseif" in Perl because Larry thinks it's
1207ugly. Your code will be interpreted as an attempt to call a method
1208named "elseif" for the class returned by the following block. This is
1209unlikely to be what you want.
1210
85ab1d1d 1211=item entering effective %s failed
5ff3f7a4 1212
85ab1d1d 1213(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1214effective uids or gids failed.
1215
748a9306
LW
1216=item Error converting file specification %s
1217
5f05dabc 1218(F) An error peculiar to VMS. Because Perl may have to deal with file
748a9306
LW
1219specifications in either VMS or Unix syntax, it converts them to a
1220single form when it must operate on them directly. Either you've
1221passed an invalid file specification to Perl, or you've found a
1222case the conversion routines don't handle. Drat.
1223
e4d48cc9
GS
1224=item %s: Eval-group in insecure regular expression
1225
1226(F) Perl detected tainted data when trying to compile a regular expression
1227that contains the C<(?{ ... })> zero-width assertion, which is unsafe.
1228See L<perlre/(?{ code })>, and L<perlsec>.
1229
e4d48cc9
GS
1230=item %s: Eval-group not allowed at run time
1231
1232(F) Perl tried to compile a regular expression containing the C<(?{ ... })>
3c247ff3
GS
1233zero-width assertion at run time, as it would when the pattern contains
1234interpolated values. Since that is a security risk, it is not allowed.
e4d48cc9
GS
1235If you insist, you may still do this by explicitly building the pattern
1236from an interpolated string at run time and using that in an eval().
1237See L<perlre/(?{ code })>.
1238
6df41af2
GS
1239=item %s: Eval-group not allowed, use re 'eval'
1240
1241(F) A regular expression contained the C<(?{ ... })> zero-width assertion,
1242but that construct is only allowed when the C<use re 'eval'> pragma is
1243in effect. See L<perlre/(?{ code })>.
1244
fc36a67e
PP
1245=item Excessively long <> operator
1246
1247(F) The contents of a <> operator may not exceed the maximum size of a
1248Perl identifier. If you're just trying to glob a long list of
1249filenames, try using the glob() operator, or put the filenames into a
1250variable and glob that.
1251
f86702cc 1252=item Execution of %s aborted due to compilation errors
a0d0e21e
LW
1253
1254(F) The final summary message when a Perl compilation fails.
1255
1256=item Exiting eval via %s
1257
75b44862
GS
1258(W exiting) You are exiting an eval by unconventional means, such as a goto,
1259or a loop control statement.
e476b1b5
GS
1260
1261=item Exiting format via %s
1262
75b44862
GS
1263(W exiting) You are exiting an eval by unconventional means, such as a goto,
1264or a loop control statement.
a0d0e21e 1265
0a753a76
PP
1266=item Exiting pseudo-block via %s
1267
75b44862
GS
1268(W exiting) You are exiting a rather special block construct (like a sort
1269block or subroutine) by unconventional means, such as a goto, or a loop
1270control statement. See L<perlfunc/sort>.
0a753a76 1271
a0d0e21e
LW
1272=item Exiting subroutine via %s
1273
75b44862
GS
1274(W exiting) You are exiting a subroutine by unconventional means, such as a
1275goto, or a loop control statement.
a0d0e21e
LW
1276
1277=item Exiting substitution via %s
1278
75b44862
GS
1279(W exiting) You are exiting a substitution by unconventional means, such as a
1280return, a goto, or a loop control statement.
a0d0e21e 1281
7b8d334a
GS
1282=item Explicit blessing to '' (assuming package main)
1283
75b44862
GS
1284(W misc) You are blessing a reference to a zero length string. This has the
1285effect of blessing the reference into the package main. This is usually not
1286what you want. Consider providing a default target package, e.g. bless($ref,
1287$p || 'MyPackage');
7b8d334a 1288
6df41af2
GS
1289=item %s: Expression syntax
1290
1291(A) You've accidentally run your script through B<csh> instead
1292of Perl. Check the #! line, or manually feed your script into
1293Perl yourself.
1294
1295=item %s failed--call queue aborted
1296
1297(F) An untrapped exception was raised while executing a CHECK, INIT, or
1298END subroutine. Processing of the remainder of the queue of such
1299routines has been prematurely ended.
1300
73b437c8
JH
1301=item false [] range "%s" in regexp
1302
75b44862
GS
1303(W regexp) A character class range must start and end at a literal character,
1304not another character class like C<\d> or C<[:alpha:]>. The "-" in your false
1305range is interpreted as a literal "-". Consider quoting the "-", "\-". See
1306L<perlre>.
73b437c8 1307
748a9306 1308=item Fatal VMS error at %s, line %d
a0d0e21e 1309
748a9306
LW
1310(P) An error peculiar to VMS. Something untoward happened in a VMS system
1311service or RTL routine; Perl's exit status should provide more details. The
1312filename in "at %s" and the line number in "line %d" tell you which section of
1313the Perl source code is distressed.
a0d0e21e
LW
1314
1315=item fcntl is not implemented
1316
1317(F) Your machine apparently doesn't implement fcntl(). What is this, a
1318PDP-11 or something?
1319
1320=item Filehandle %s never opened
1321
75b44862
GS
1322(W unopened) An I/O operation was attempted on a filehandle that was never
1323initialized. You need to do an open() or a socket() call, or call a
1324constructor from the FileHandle package.
a0d0e21e 1325
af8c498a 1326=item Filehandle %s opened only for input
a0d0e21e 1327
75b44862
GS
1328(W io) You tried to write on a read-only filehandle. If you intended it to be
1329a read-write filehandle, you needed to open it with "+<" or "+>" or "+>>"
1330instead of with "<" or nothing. If you intended only to write the file, use
1331">" or ">>". See L<perlfunc/open>.
a0d0e21e 1332
af8c498a 1333=item Filehandle %s opened only for output
a0d0e21e 1334
e476b1b5 1335(W io) You tried to read from a filehandle opened only for writing. If you
75b44862
GS
1336intended it to be a read/write filehandle, you needed to open it with "+<" or
1337"+>" or "+>>" instead of with "<" or nothing. If you intended only to read
1338from the file, use "<". See L<perlfunc/open>.
a0d0e21e
LW
1339
1340=item Final $ should be \$ or $name
1341
1342(F) You must now decide whether the final $ in a string was meant to be
1343a literal dollar sign, or was meant to introduce a variable name
1344that happens to be missing. So you have to put either the backslash or
1345the name.
1346
1347=item Final @ should be \@ or @name
1348
1349(F) You must now decide whether the final @ in a string was meant to be
1350a literal "at" sign, or was meant to introduce a variable name
1351that happens to be missing. So you have to put either the backslash or
1352the name.
1353
56e90b21
GS
1354=item flock() on closed filehandle %s
1355
e476b1b5 1356(W closed) The filehandle you're attempting to flock() got itself closed some
56e90b21
GS
1357time before now. Check your logic flow. flock() operates on filehandles.
1358Are you attempting to call flock() on a dirhandle by the same name?
1359
6df41af2
GS
1360=item ?+* follows nothing in regexp
1361
1362(F) You started a regular expression with a quantifier. Backslash it
1363if you meant it literally. See L<perlre>.
1364
1365=item Format not terminated
1366
1367(F) A format must be terminated by a line with a solitary dot. Perl got
1368to the end of your file without finding such a line.
1369
a0d0e21e
LW
1370=item Format %s redefined
1371
e476b1b5 1372(W redefine) You redefined a format. To suppress this warning, say
a0d0e21e
LW
1373
1374 {
4438c4b7 1375 no warnings;
a0d0e21e
LW
1376 eval "format NAME =...";
1377 }
1378
a0d0e21e
LW
1379=item Found = in conditional, should be ==
1380
e476b1b5 1381(W syntax) You said
a0d0e21e
LW
1382
1383 if ($foo = 123)
1384
1385when you meant
1386
1387 if ($foo == 123)
1388
1389(or something like that).
1390
6df41af2
GS
1391=item %s found where operator expected
1392
1393(S) The Perl lexer knows whether to expect a term or an operator. If it
1394sees what it knows to be a term when it was expecting to see an operator,
1395it gives you this warning. Usually it indicates that an operator or
1396delimiter was omitted, such as a semicolon.
1397
a0d0e21e
LW
1398=item gdbm store returned %d, errno %d, key "%s"
1399
1400(S) A warning from the GDBM_File extension that a store failed.
1401
1402=item gethostent not implemented
1403
1404(F) Your C library apparently doesn't implement gethostent(), probably
1405because if it did, it'd feel morally obligated to return every hostname
1406on the Internet.
1407
69282e91 1408=item get%sname() on closed socket %s
a0d0e21e 1409
e476b1b5 1410(W closed) You tried to get a socket or peer socket name on a closed socket.
a0d0e21e
LW
1411Did you forget to check the return value of your socket() call?
1412
748a9306
LW
1413=item getpwnam returned invalid UIC %#o for user "%s"
1414
1415(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
1416C<getpwnam> operator returned an invalid UIC.
1417
6df41af2
GS
1418=item getsockopt() on closed socket %s
1419
1420(W closed) You tried to get a socket option on a closed socket. Did
1421you forget to check the return value of your socket() call? See
1422L<perlfunc/getsockopt>.
1423
1424=item Global symbol "%s" requires explicit package name
1425
1426(F) You've said "use strict vars", which indicates that all variables
1427must either be lexically scoped (using "my"), declared beforehand using
1428"our", or explicitly qualified to say which package the global variable
1429is in (using "::").
1430
e476b1b5
GS
1431=item glob failed (%s)
1432
1433(W glob) Something went wrong with the external program(s) used for C<glob>
75b44862
GS
1434and C<< <*.c> >>. Usually, this means that you supplied a C<glob> pattern
1435that caused the external program to fail and exit with a nonzero status. If
1436the message indicates that the abnormal exit resulted in a coredump, this may
1437also mean that your csh (C shell) is broken. If so, you should change all of
1438the csh-related variables in config.sh: If you have tcsh, make the variables
1439refer to it as if it were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise,
1440make them all empty (except that C<d_csh> should be C<'undef'>) so that Perl
1441will think csh is missing. In either case, after editing config.sh, run
1442C<./Configure -S> and rebuild Perl.
e476b1b5 1443
a0d0e21e
LW
1444=item Glob not terminated
1445
1446(F) The lexer saw a left angle bracket in a place where it was expecting
1447a term, so it's looking for the corresponding right angle bracket, and not
1448finding it. Chances are you left some needed parentheses out earlier in
1449the line, and you really meant a "less than".
1450
6df41af2 1451=item Got an error from DosAllocMem
a0d0e21e 1452
6df41af2
GS
1453(P) An error peculiar to OS/2. Most probably you're using an obsolete
1454version of Perl, and this should not happen anyway.
a0d0e21e
LW
1455
1456=item goto must have label
1457
1458(F) Unlike with "next" or "last", you're not allowed to goto an
1459unspecified destination. See L<perlfunc/goto>.
1460
6df41af2
GS
1461=item %s had compilation errors
1462
1463(F) The final summary message when a C<perl -c> fails.
1464
a0d0e21e
LW
1465=item Had to create %s unexpectedly
1466
e476b1b5 1467(S internal) A routine asked for a symbol from a symbol table that ought to have
a0d0e21e
LW
1468existed already, but for some reason it didn't, and had to be created on
1469an emergency basis to prevent a core dump.
1470
1471=item Hash %%s missing the % in argument %d of %s()
1472
75b44862
GS
1473(D deprecated) Really old Perl let you omit the % on hash names in some spots.
1474This is now heavily deprecated.
a0d0e21e 1475
6df41af2
GS
1476=item %s has too many errors
1477
1478(F) The parser has given up trying to parse the program after 10 errors.
1479Further error messages would likely be uninformative.
1480
252aa082
JH
1481=item Hexadecimal number > 0xffffffff non-portable
1482
e476b1b5 1483(W portable) The hexadecimal number you specified is larger than 2**32-1
9e24b6e2
JH
1484(4294967295) and therefore non-portable between systems. See
1485L<perlport> for more on portability concerns.
252aa082 1486
8903cb82
PP
1487=item Identifier too long
1488
1489(F) Perl limits identifiers (names for variables, functions, etc.) to
fc36a67e
PP
1490about 250 characters for simple names, and somewhat more for compound
1491names (like C<$A::B>). You've exceeded Perl's limits. Future
1492versions of Perl are likely to eliminate these arbitrary limitations.
8903cb82 1493
6df41af2 1494=item Illegal binary digit %s
f675dbe5 1495
6df41af2 1496(F) You used a digit other than 0 or 1 in a binary number.
f675dbe5 1497
6df41af2 1498=item Illegal binary digit %s ignored
a0d0e21e 1499
75b44862
GS
1500(W digit) You may have tried to use a digit other than 0 or 1 in a binary
1501number. Interpretation of the binary number stopped before the offending
1502digit.
a0d0e21e 1503
4fdae800
PP
1504=item Illegal character %s (carriage return)
1505
d5898338
GS
1506(F) Perl normally treats carriage returns in the program text as it
1507would any other whitespace, which means you should never see this
1508error when Perl was built using standard options. For some reason,
1509your version of Perl appears to have been built without this support.
1510Talk to your Perl administrator.
4fdae800 1511
a0d0e21e
LW
1512=item Illegal division by zero
1513
1514(F) You tried to divide a number by 0. Either something was wrong in your
1515logic, or you need to put a conditional in to guard against meaningless input.
1516
6df41af2
GS
1517=item Illegal hexadecimal digit %s ignored
1518
75b44862
GS
1519(W digit) You may have tried to use a character other than 0 - 9 or A - F,
1520a - f in a hexadecimal number. Interpretation of the hexadecimal number
1521stopped before the illegal character.
6df41af2 1522
a0d0e21e
LW
1523=item Illegal modulus zero
1524
1525(F) You tried to divide a number by 0 to get the remainder. Most numbers
1526don't take to this kindly.
1527
6df41af2 1528=item Illegal number of bits in vec
399388f4 1529
6df41af2
GS
1530(F) The number of bits in vec() (the third argument) must be a power of
1531two from 1 to 32 (or 64, if your platform supports that).
399388f4
GS
1532
1533=item Illegal octal digit %s
a0d0e21e
LW
1534
1535(F) You used an 8 or 9 in a octal number.
1536
399388f4 1537=item Illegal octal digit %s ignored
748a9306 1538
75b44862
GS
1539(W digit) You may have tried to use an 8 or 9 in a octal number.
1540Interpretation of the octal number stopped before the 8 or 9.
748a9306 1541
6df41af2 1542=item Illegal switch in PERL5OPT: %s
6ff81951 1543
6df41af2
GS
1544(X) The PERL5OPT environment variable may only be used to set the
1545following switches: B<-[DIMUdmw]>.
6ff81951 1546
6df41af2 1547=item Ill-formed CRTL environ value "%s"
81e118e0 1548
75b44862
GS
1549(W internal) A warning peculiar to VMS. Perl tried to read the CRTL's
1550internal environ array, and encountered an element without the C<=> delimiter
6df41af2 1551used to separate keys from values. The element is ignored.
09bef843 1552
6df41af2 1553=item Ill-formed message in prime_env_iter: |%s|
54310121 1554
75b44862
GS
1555(W internal) A warning peculiar to VMS. Perl tried to read a logical name or
1556CLI symbol definition when preparing to iterate over %ENV, and didn't see the
1557expected delimiter between key and value, so the line was ignored.
54310121 1558
6df41af2 1559=item (in cleanup) %s
9607fc9c 1560
75b44862
GS
1561(W misc) This prefix usually indicates that a DESTROY() method raised the
1562indicated exception. Since destructors are usually called by the system at
1563arbitrary points during execution, and often a vast number of times, the
1564warning is issued only once for any number of failures that would otherwise
1565result in the same message being repeated.
6df41af2 1566
75b44862
GS
1567Failure of user callbacks dispatched using the C<G_KEEPERR> flag could also
1568result in this warning. See L<perlcall/G_KEEPERR>.
9607fc9c 1569
a0d0e21e
LW
1570=item Insecure dependency in %s
1571
8b1a09fc 1572(F) You tried to do something that the tainting mechanism didn't like.
a0d0e21e
LW
1573The tainting mechanism is turned on when you're running setuid or setgid,
1574or when you specify B<-T> to turn it on explicitly. The tainting mechanism
1575labels all data that's derived directly or indirectly from the user,
1576who is considered to be unworthy of your trust. If any such data is
1577used in a "dangerous" operation, you get this error. See L<perlsec>
1578for more information.
1579
1580=item Insecure directory in %s
1581
1582(F) You can't use system(), exec(), or a piped open in a setuid or setgid
8b1a09fc 1583script if C<$ENV{PATH}> contains a directory that is writable by the world.
a0d0e21e
LW
1584See L<perlsec>.
1585
62f468fc 1586=item Insecure $ENV{%s} while running %s
a0d0e21e
LW
1587
1588(F) You can't use system(), exec(), or a piped open in a setuid or
62f468fc
G
1589setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
1590C<$ENV{ENV}> or C<$ENV{BASH_ENV}> are derived from data supplied (or
a0d0e21e
LW
1591potentially supplied) by the user. The script must set the path to a
1592known value, using trustworthy data. See L<perlsec>.
1593
6df41af2
GS
1594=item In string, @%s now must be written as \@%s
1595
1596(F) It used to be that Perl would try to guess whether you wanted an
1597array interpolated or a literal @. It did this when the string was first
1598used at runtime. Now strings are parsed at compile time, and ambiguous
1599instances of @ must be disambiguated, either by prepending a backslash to
1600indicate a literal, or by declaring (or using) the array within the
1601program before the string (lexically). (Someday it will simply assume
1602that an unbackslashed @ interpolates an array.)
1603
a7ae9550
GS
1604=item Integer overflow in %s number
1605
75b44862
GS
1606(W overflow) The hexadecimal, octal or binary number you have specified
1607either as a literal or as an argument to hex() or oct() is too big for your
9e24b6e2
JH
1608architecture, and has been converted to a floating point number. On a
160932-bit architecture the largest hexadecimal, octal or binary number
1610representable without overflow is 0xFFFFFFFF, 037777777777, or
16110b11111111111111111111111111111111 respectively. Note that Perl
1612transparently promotes all numbers to a floating point representation
1613internally--subject to loss of precision errors in subsequent
1614operations.
bbce6d69 1615
6df41af2
GS
1616=item internal disaster in regexp
1617
1618(P) Something went badly wrong in the regular expression parser.
1619
748a9306
LW
1620=item Internal inconsistency in tracking vforks
1621
1622(S) A warning peculiar to VMS. Perl keeps track of the number
5f05dabc 1623of times you've called C<fork> and C<exec>, to determine
2ba9eb46 1624whether the current call to C<exec> should affect the current
b687b08b 1625script or a subprocess (see L<perlvms/"exec LIST">). Somehow, this count
748a9306
LW
1626has become scrambled, so Perl is making a guess and treating
1627this C<exec> as a request to terminate the Perl script
1628and execute the specified command.
1629
a0d0e21e
LW
1630=item internal urp in regexp at /%s/
1631
1632(P) Something went badly awry in the regular expression parser.
1633
6df41af2
GS
1634=item %s (...) interpreted as function
1635
75b44862
GS
1636(W syntax) You've run afoul of the rule that says that any list operator
1637followed by parentheses turns into a function, with all the list operators
1638arguments found inside the parentheses. See L<perlop/Terms and List Operators
1639(Leftward)>.
6df41af2 1640
09bef843
SB
1641=item Invalid %s attribute: %s
1642
1643The indicated attribute for a subroutine or variable was not recognized
1644by Perl or by a user-supplied handler. See L<attributes>.
1645
1646=item Invalid %s attributes: %s
1647
1648The indicated attributes for a subroutine or variable were not recognized
1649by Perl or by a user-supplied handler. See L<attributes>.
1650
c635e13b
PP
1651=item Invalid conversion in %s: "%s"
1652
e476b1b5 1653(W printf) Perl does not understand the given format conversion.
c635e13b
PP
1654See L<perlfunc/sprintf>.
1655
6df41af2
GS
1656=item invalid [] range "%s" in regexp
1657
1658(F) The range specified in a character class had a minimum character
1659greater than the maximum character. See L<perlre>.
1660
09bef843
SB
1661=item Invalid separator character %s in attribute list
1662
0120eecf 1663(F) Something other than a colon or whitespace was seen between the
09bef843
SB
1664elements of an attribute list. If the previous attribute
1665had a parenthesised parameter list, perhaps that list was terminated
1666too soon. See L<attributes>.
1667
96e4d5b1
PP
1668=item Invalid type in pack: '%s'
1669
8903cb82 1670(F) The given character is not a valid pack type. See L<perlfunc/pack>.
e476b1b5 1671(W pack) The given character is not a valid pack type but used to be silently
fb73857a 1672ignored.
96e4d5b1
PP
1673
1674=item Invalid type in unpack: '%s'
1675
8903cb82 1676(F) The given character is not a valid unpack type. See L<perlfunc/unpack>.
75b44862
GS
1677(W unpack) The given character is not a valid unpack type but used to be
1678silently ignored.
96e4d5b1 1679
a0d0e21e
LW
1680=item ioctl is not implemented
1681
1682(F) Your machine apparently doesn't implement ioctl(), which is pretty
1683strange for a machine that supports C.
1684
1685=item junk on end of regexp
1686
1687(P) The regular expression parser is confused.
1688
1689=item Label not found for "last %s"
1690
1691(F) You named a loop to break out of, but you're not currently in a
1692loop of that name, not even if you count where you were called from.
1693See L<perlfunc/last>.
1694
1695=item Label not found for "next %s"
1696
1697(F) You named a loop to continue, but you're not currently in a loop of
1698that name, not even if you count where you were called from. See
1699L<perlfunc/last>.
1700
1701=item Label not found for "redo %s"
1702
1703(F) You named a loop to restart, but you're not currently in a loop of
1704that name, not even if you count where you were called from. See
1705L<perlfunc/last>.
1706
85ab1d1d 1707=item leaving effective %s failed
5ff3f7a4 1708
85ab1d1d 1709(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1710effective uids or gids failed.
1711
69282e91 1712=item listen() on closed socket %s
a0d0e21e 1713
75b44862
GS
1714(W closed) You tried to do a listen on a closed socket. Did you forget to
1715check the return value of your socket() call? See L<perlfunc/listen>.
a0d0e21e 1716
cd06dffe
GS
1717=item Lvalue subs returning %s not implemented yet
1718
1719(F) Due to limitations in the current implementation, array and hash
1720values cannot be returned in subroutines used in lvalue context.
1721See L<perlsub/"Lvalue subroutines">.
1722
6df41af2
GS
1723=item Malformed PERLLIB_PREFIX
1724
1725(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
1726
1727 prefix1;prefix2
1728
1729or
1730
1731 prefix1 prefix2
1732
1733with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix
1734of a builtin library search path, prefix2 is substituted. The error
1735may appear if components are not found, or are too long. See
1736"PERLLIB_PREFIX" in F<README.os2>.
1737
1738=item %s matches null string many times
1739
1740(W regexp) The pattern you've specified would be an infinite loop if the
1741regular expression engine didn't specifically check for that. See L<perlre>.
1742
1743=item % may only be used in unpack
1744
1745(F) You can't pack a string by supplying a checksum, because the
1746checksumming process loses information, and you can't go the other
1747way. See L<perlfunc/unpack>.
1748
a0d0e21e
LW
1749=item Method for operation %s not found in package %s during blessing
1750
1751(F) An attempt was made to specify an entry in an overloading table that
e7ea3e70 1752doesn't resolve to a valid subroutine. See L<overload>.
a0d0e21e 1753
3cdd684c
TP
1754=item Method %s not permitted
1755
1756See Server error.
1757
a0d0e21e
LW
1758=item Might be a runaway multi-line %s string starting on line %d
1759
1760(S) An advisory indicating that the previous error may have been caused
1761by a missing delimiter on a string or pattern, because it eventually
1762ended earlier on the current line.
1763
1764=item Misplaced _ in number
1765
e476b1b5 1766(W syntax) An underline in a decimal constant wasn't on a 3-digit boundary.
a0d0e21e 1767
4a2d328f 1768=item Missing %sbrace%s on \N{}
423cee85 1769
4a2d328f 1770(F) Wrong syntax of character name literal C<\N{charname}> within
423cee85
JH
1771double-quotish context.
1772
a0d0e21e
LW
1773=item Missing comma after first argument to %s function
1774
1775(F) While certain functions allow you to specify a filehandle or an
1776"indirect object" before the argument list, this ain't one of them.
1777
06eaf0bc
GS
1778=item Missing command in piped open
1779
e476b1b5 1780(W pipe) You used the C<open(FH, "| command")> or C<open(FH, "command |")>
06eaf0bc
GS
1781construction, but the command was missing or blank.
1782
6df41af2
GS
1783=item Missing name in "my sub"
1784
1785(F) The reserved syntax for lexically scoped subroutines requires that they
1786have a name with which they can be found.
1787
1788=item Missing $ on loop variable
1789
1790(F) Apparently you've been programming in B<csh> too much. Variables are always
1791mentioned with the $ in Perl, unlike in the shells, where it can vary from
1792one line to the next.
1793
cc507455 1794=item (Missing operator before %s?)
748a9306
LW
1795
1796(S) This is an educated guess made in conjunction with the message "%s
1797found where operator expected". Often the missing operator is a comma.
1798
d98d5fff 1799=item Missing right curly or square bracket
a0d0e21e 1800
d98d5fff
GS
1801(F) The lexer counted more opening curly or square brackets than
1802closing ones. As a general rule, you'll find it's missing near the place
1803you were last editing.
a0d0e21e 1804
6df41af2
GS
1805=item (Missing semicolon on previous line?)
1806
1807(S) This is an educated guess made in conjunction with the message "%s
1808found where operator expected". Don't automatically put a semicolon on
1809the previous line just because you saw this message.
1810
a0d0e21e
LW
1811=item Modification of a read-only value attempted
1812
1813(F) You tried, directly or indirectly, to change the value of a
5f05dabc 1814constant. You didn't, of course, try "2 = 1", because the compiler
a0d0e21e
LW
1815catches that. But an easy way to do the same thing is:
1816
1817 sub mod { $_[0] = 1 }
1818 mod(2);
1819
1820Another way is to assign to a substr() that's off the end of the string.
1821
4fe4fdb3 1822=item Modification of non-creatable array value attempted, subscript %d
a0d0e21e
LW
1823
1824(F) You tried to make an array value spring into existence, and the
1825subscript was probably negative, even counting from end of the array
1826backwards.
1827
4fe4fdb3 1828=item Modification of non-creatable hash value attempted, subscript "%s"
a0d0e21e 1829
19a09eb8 1830(P) You tried to make a hash value spring into existence, and it couldn't
a0d0e21e
LW
1831be created for some peculiar reason.
1832
1833=item Module name must be constant
1834
1835(F) Only a bare module name is allowed as the first argument to a "use".
1836
6df41af2
GS
1837=item Module name required with -M option
1838
1839(F) The C<-M> option says that Perl should load some module, but you
1840omitted the name of the module. Consult L<perlrun> for full details
1841about C<-M>.
1842
a0d0e21e
LW
1843=item msg%s not implemented
1844
1845(F) You don't have System V message IPC on your system.
1846
1847=item Multidimensional syntax %s not supported
1848
75b44862
GS
1849(W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>.
1850They're written like C<$foo[1][2][3]>, as in C.
8b1a09fc 1851
6df41af2 1852=item / must be followed by a*, A* or Z*
09bef843 1853
6df41af2
GS
1854(F) You had a pack template indicating a counted-length string,
1855Currently the only things that can have their length counted are a*, A* or Z*.
1856See L<perlfunc/pack>.
1857
1858=item / must be followed by a, A or Z
1859
1860(F) You had an unpack template indicating a counted-length string,
1861which must be followed by one of the letters a, A or Z
1862to indicate what sort of string is to be unpacked.
1863See L<perlfunc/pack>.
1864
1865=item / must follow a numeric type
1866
1867(F) You had an unpack template that contained a '#',
1868but this did not follow some numeric unpack specification.
1869See L<perlfunc/pack>.
1870
1871=item "my sub" not yet implemented
1872
1873(F) Lexically scoped subroutines are not yet implemented. Don't try that
1874yet.
1875
1876=item "my" variable %s can't be in a package
1877
1878(F) Lexically scoped variables aren't in a package, so it doesn't make sense
1879to try to declare one with a package qualifier on the front. Use local()
1880if you want to localize a package variable.
09bef843 1881
8b1a09fc
PP
1882=item Name "%s::%s" used only once: possible typo
1883
e476b1b5 1884(W once) Typographical errors often show up as unique variable names.
68dc0745 1885If you had a good reason for having a unique name, then just mention
77ca0c92
LW
1886it again somehow to suppress the message. The C<our> declaration is
1887provided for this purpose.
a0d0e21e
LW
1888
1889=item Negative length
1890
1891(F) You tried to do a read/write/send/recv operation with a buffer length
1892that is less than 0. This is difficult to imagine.
1893
1894=item nested *?+ in regexp
1895
5f05dabc 1896(F) You can't quantify a quantifier without intervening parentheses. So
a0d0e21e
LW
1897things like ** or +* or ?* are illegal.
1898
5f05dabc 1899Note, however, that the minimal matching quantifiers, C<*?>, C<+?>, and C<??> appear
a0d0e21e
LW
1900to be nested quantifiers, but aren't. See L<perlre>.
1901
6df41af2 1902=item %s never introduced
a0d0e21e 1903
6df41af2
GS
1904(S internal) The symbol in question was declared but somehow went out of scope
1905before it could possibly have been used.
a0d0e21e
LW
1906
1907=item No %s allowed while running setuid
1908
1909(F) Certain operations are deemed to be too insecure for a setuid or setgid
1910script to even be allowed to attempt. Generally speaking there will be
1911another way to do what you want that is, if not secure, at least securable.
1912See L<perlsec>.
1913
1914=item No B<-e> allowed in setuid scripts
1915
1916(F) A setuid script can't be specified by the user.
1917
1918=item No comma allowed after %s
1919
1920(F) A list operator that has a filehandle or "indirect object" is not
1921allowed to have a comma between that and the following arguments.
1922Otherwise it'd be just another one of the arguments.
1923
0a753a76
PP
1924One possible cause for this is that you expected to have imported a
1925constant to your name space with B<use> or B<import> while no such
1926importing took place, it may for example be that your operating system
1927does not support that particular constant. Hopefully you did use an
1928explicit import list for the constants you expect to see, please see
1929L<perlfunc/use> and L<perlfunc/import>. While an explicit import list
1930would probably have caught this error earlier it naturally does not
1931remedy the fact that your operating system still does not support that
1932constant. Maybe you have a typo in the constants of the symbol import
1933list of B<use> or B<import> or in the constant name at the line where
1934this error was triggered?
1935
748a9306
LW
1936=item No command into which to pipe on command line
1937
1938(F) An error peculiar to VMS. Perl handles its own command line redirection,
54310121 1939and found a '|' at the end of the command line, so it doesn't know where you
748a9306
LW
1940want to pipe the output from this command.
1941
a0d0e21e
LW
1942=item No DB::DB routine defined
1943
1944(F) The currently executing code was compiled with the B<-d> switch,
1945but for some reason the perl5db.pl file (or some facsimile thereof)
1946didn't define a routine to be called at the beginning of each
1947statement. Which is odd, because the file should have been required
1948automatically, and should have blown up the require if it didn't parse
1949right.
1950
1951=item No dbm on this machine
1952
1953(P) This is counted as an internal error, because every machine should
5f05dabc 1954supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
a0d0e21e
LW
1955
1956=item No DBsub routine
1957
1958(F) The currently executing code was compiled with the B<-d> switch,
1959but for some reason the perl5db.pl file (or some facsimile thereof)
1960didn't define a DB::sub routine to be called at the beginning of each
1961ordinary subroutine call.
1962
c47ff5f1 1963=item No error file after 2> or 2>> on command line
748a9306
LW
1964
1965(F) An error peculiar to VMS. Perl handles its own command line redirection,
c47ff5f1 1966and found a '2>' or a '2>>' on the command line, but can't find
8b1a09fc 1967the name of the file to which to write data destined for stderr.
748a9306 1968
c47ff5f1 1969=item No input file after < on command line
748a9306
LW
1970
1971(F) An error peculiar to VMS. Perl handles its own command line redirection,
c47ff5f1 1972and found a '<' on the command line, but can't find the name of the file
8b1a09fc 1973from which to read data for stdin.
748a9306 1974
6df41af2
GS
1975=item No #! line
1976
1977(F) The setuid emulator requires that scripts have a well-formed #! line
1978even on machines that don't support the #! construct.
1979
1980=item "no" not allowed in expression
1981
1982(F) The "no" keyword is recognized and executed at compile time, and returns
1983no useful value. See L<perlmod>.
1984
c47ff5f1 1985=item No output file after > on command line
748a9306
LW
1986
1987(F) An error peculiar to VMS. Perl handles its own command line redirection,
c47ff5f1 1988and found a lone '>' at the end of the command line, so it doesn't know
54310121 1989where you wanted to redirect stdout.
748a9306 1990
c47ff5f1 1991=item No output file after > or >> on command line
748a9306
LW
1992
1993(F) An error peculiar to VMS. Perl handles its own command line redirection,
c47ff5f1 1994and found a '>' or a '>>' on the command line, but can't find the
8b1a09fc 1995name of the file to which to write data destined for stdout.
748a9306 1996
1ec3e8de
GS
1997=item No package name allowed for variable %s in "our"
1998
1999(F) Fully qualified variable names are not allowed in "our" declarations,
2000because that doesn't make much sense under existing semantics. Such
2001syntax is reserved for future extensions.
2002
a0d0e21e
LW
2003=item No Perl script found in input
2004
2005(F) You called C<perl -x>, but no line was found in the file beginning
2006with #! and containing the word "perl".
2007
2008=item No setregid available
2009
2010(F) Configure didn't find anything resembling the setregid() call for
2011your system.
2012
2013=item No setreuid available
2014
2015(F) Configure didn't find anything resembling the setreuid() call for
2016your system.
2017
a67e862a 2018=item No space allowed after -%c
a0d0e21e 2019
a67e862a
GS
2020(F) The argument to the indicated command line switch must follow immediately
2021after the switch, without intervening spaces.
a0d0e21e 2022
6df41af2
GS
2023=item No %s specified for -%c
2024
2025(F) The indicated command line switch needs a mandatory argument, but
2026you haven't specified one.
2027
2028=item No such pipe open
2029
2030(P) An error peculiar to VMS. The internal routine my_pclose() tried to
2031close a pipe which hadn't been opened. This should have been caught earlier as
2032an attempt to close an unopened filehandle.
2033
88e9b055 2034=item No such pseudo-hash field "%s"
57079c46 2035
88e9b055 2036(F) You tried to access an array as a hash, but the field name used is
57079c46
GA
2037not defined. The hash at index 0 should map all valid field names to
2038array indices for that to work.
2039
88e9b055 2040=item No such pseudo-hash field "%s" in variable %s of type %s
f1192cee
GA
2041
2042(F) You tried to access a field of a typed variable where the type
2043does not know about the field name. The field names are looked up in
2044the %FIELDS hash in the type package at compile time. The %FIELDS hash
2045is usually set up with the 'fields' pragma.
2046
a0d0e21e
LW
2047=item No such signal: SIG%s
2048
75b44862
GS
2049(W signal) You specified a signal name as a subscript to %SIG that was not
2050recognized. Say C<kill -l> in your shell to see the valid signal names on
2051your system.
a0d0e21e
LW
2052
2053=item Not a CODE reference
2054
2055(F) Perl was trying to evaluate a reference to a code value (that is, a
2056subroutine), but found a reference to something else instead. You can
2057use the ref() function to find out what kind of ref it really was.
2058See also L<perlref>.
2059
2060=item Not a format reference
2061
2062(F) I'm not sure how you managed to generate a reference to an anonymous
2063format, but this indicates you did, and that it didn't exist.
2064
2065=item Not a GLOB reference
2066
55497cff 2067(F) Perl was trying to evaluate a reference to a "typeglob" (that is,
a0d0e21e
LW
2068a symbol table entry that looks like C<*foo>), but found a reference to
2069something else instead. You can use the ref() function to find out
2070what kind of ref it really was. See L<perlref>.
2071
2072=item Not a HASH reference
2073
2074(F) Perl was trying to evaluate a reference to a hash value, but
2075found a reference to something else instead. You can use the ref()
2076function to find out what kind of ref it really was. See L<perlref>.
2077
6df41af2
GS
2078=item Not an ARRAY reference
2079
2080(F) Perl was trying to evaluate a reference to an array value, but
2081found a reference to something else instead. You can use the ref()
2082function to find out what kind of ref it really was. See L<perlref>.
2083
a0d0e21e
LW
2084=item Not a perl script
2085
2086(F) The setuid emulator requires that scripts have a well-formed #! line
2087even on machines that don't support the #! construct. The line must
2088mention perl.
2089
2090=item Not a SCALAR reference
2091
2092(F) Perl was trying to evaluate a reference to a scalar value, but
2093found a reference to something else instead. You can use the ref()
2094function to find out what kind of ref it really was. See L<perlref>.
2095
2096=item Not a subroutine reference
2097
2098(F) Perl was trying to evaluate a reference to a code value (that is, a
2099subroutine), but found a reference to something else instead. You can
2100use the ref() function to find out what kind of ref it really was.
2101See also L<perlref>.
2102
e7ea3e70 2103=item Not a subroutine reference in overload table
a0d0e21e
LW
2104
2105(F) An attempt was made to specify an entry in an overloading table that
8b1a09fc 2106doesn't somehow point to a valid subroutine. See L<overload>.
a0d0e21e 2107
a0d0e21e
LW
2108=item Not enough arguments for %s
2109
2110(F) The function requires more arguments than you specified.
2111
6df41af2
GS
2112=item Not enough format arguments
2113
2114(W syntax) A format specified more picture fields than the next line supplied.
2115See L<perlform>.
2116
2117=item %s: not found
2118
2119(A) You've accidentally run your script through the Bourne shell
2120instead of Perl. Check the #! line, or manually feed your script
2121into Perl yourself.
2122
2123=item no UTC offset information; assuming local time is UTC
a0d0e21e 2124
6df41af2
GS
2125(S) A warning peculiar to VMS. Perl was unable to find the local
2126timezone offset, so it's assuming that local system time is equivalent
2127to UTC. If it's not, define the logical name F<SYS$TIMEZONE_DIFFERENTIAL>
2128to translate to the number of seconds which need to be added to UTC to
2129get local time.
a0d0e21e
LW
2130
2131=item Null filename used
2132
5f05dabc 2133(F) You can't require the null filename, especially because on many machines
a0d0e21e
LW
2134that means the current directory! See L<perlfunc/require>.
2135
6df41af2
GS
2136=item NULL OP IN RUN
2137
2138(P debugging) Some internal routine called run() with a null opcode pointer.
2139
55497cff
PP
2140=item Null picture in formline
2141
2142(F) The first argument to formline must be a valid format picture
2143specification. It was found to be empty, which probably means you
2144supplied it an uninitialized value. See L<perlform>.
2145
a0d0e21e
LW
2146=item Null realloc
2147
2148(P) An attempt was made to realloc NULL.
2149
2150=item NULL regexp argument
2151
5f05dabc 2152(P) The internal pattern matching routines blew it big time.
a0d0e21e
LW
2153
2154=item NULL regexp parameter
2155
2156(P) The internal pattern matching routines are out of their gourd.
2157
fc36a67e
PP
2158=item Number too long
2159
2160(F) Perl limits the representation of decimal numbers in programs to about
2161about 250 characters. You've exceeded that length. Future versions of
2162Perl are likely to eliminate this arbitrary limitation. In the meantime,
2163try using scientific notation (e.g. "1e6" instead of "1_000_000").
2164
6df41af2
GS
2165=item Octal number in vector unsupported
2166
2167(F) Numbers with a leading C<0> are not currently allowed in vectors. The
2168octal number interpretation of such numbers may be supported in a future
2169version.
2170
252aa082
JH
2171=item Octal number > 037777777777 non-portable
2172
75b44862
GS
2173(W portable) The octal number you specified is larger than 2**32-1
2174(4294967295) and therefore non-portable between systems. See L<perlport> for
2175more on portability concerns.
252aa082
JH
2176
2177See also L<perlport> for writing portable code.
2178
1930e939 2179=item Odd number of elements in hash assignment
a0d0e21e 2180
e476b1b5 2181(W misc) You specified an odd number of elements to initialize a hash, which
1930e939 2182is odd, because hashes come in key/value pairs.
a0d0e21e 2183
bbce6d69
PP
2184=item Offset outside string
2185
2186(F) You tried to do a read/write/send/recv operation with an offset
2187pointing outside the buffer. This is difficult to imagine.
2188The sole exception to this is that C<sysread()>ing past the buffer
2189will extend the buffer and zero pad the new area.
2190
a0d0e21e
LW
2191=item oops: oopsAV
2192
e476b1b5 2193(S internal) An internal warning that the grammar is screwed up.
a0d0e21e
LW
2194
2195=item oops: oopsHV
2196
e476b1b5 2197(S internal) An internal warning that the grammar is screwed up.
a0d0e21e 2198
56f7f34b 2199=item Operation `%s': no method found, %s
44a8e56a 2200
e7ea3e70
IZ
2201(F) An attempt was made to perform an overloaded operation for which
2202no handler was defined. While some handlers can be autogenerated in
2203terms of other handlers, there is no default handler for any
2204operation, unless C<fallback> overloading key is specified to be
2205true. See L<overload>.
44a8e56a 2206
748a9306
LW
2207=item Operator or semicolon missing before %s
2208
e476b1b5 2209(S ambiguous) You used a variable or subroutine call where the parser was
748a9306
LW
2210expecting an operator. The parser has assumed you really meant
2211to use an operator, but this is highly likely to be incorrect.
2212For example, if you say "*foo *foo" it will be interpreted as
2213if you said "*foo * 'foo'".
2214
6df41af2
GS
2215=item "our" variable %s redeclared
2216
2217(W misc) You seem to have already declared the same global once before in the
2218current lexical scope.
2219
a80b8354
GS
2220=item Out of memory!
2221
2222(X) The malloc() function returned 0, indicating there was insufficient
2223remaining memory (or virtual memory) to satisfy the request. Perl
2224has no option but to exit immediately.
2225
6df41af2 2226=item Out of memory during "large" request for %s
a0d0e21e 2227
6df41af2
GS
2228(F) The malloc() function returned 0, indicating there was insufficient
2229remaining memory (or virtual memory) to satisfy the request. However,
2230the request was judged large enough (compile-time default is 64K), so
2231a possibility to shut down by trapping this error is granted.
a0d0e21e 2232
1b979e0a 2233=item Out of memory during request for %s
a0d0e21e 2234
55497cff 2235(X|F) The malloc() function returned 0, indicating there was insufficient
54310121 2236remaining memory (or virtual memory) to satisfy the request.
eff9c6e2
CS
2237
2238The request was judged to be small, so the possibility to trap it
2239depends on the way perl was compiled. By default it is not trappable.
2240However, if compiled for this, Perl may use the contents of C<$^M> as
2241an emergency pool after die()ing with this message. In this case the
55497cff
PP
2242error is trappable I<once>.
2243
1b979e0a
IZ
2244=item Out of memory during ridiculously large request
2245
2246(F) You can't allocate more than 2^31+"small amount" bytes. This error
2247is most likely to be caused by a typo in the Perl program. e.g., C<$arr[time]>
2248instead of C<$arr[$time]>.
2249
6df41af2
GS
2250=item Out of memory for yacc stack
2251
2252(F) The yacc parser wanted to grow its stack so it could continue parsing,
2253but realloc() wouldn't give it more memory, virtual or otherwise.
2254
2255=item @ outside of string
2256
2257(F) You had a pack template that specified an absolute position outside
2258the string being unpacked. See L<perlfunc/pack>.
2259
2260=item %s package attribute may clash with future reserved word: %s
2261
75b44862
GS
2262(W reserved) A lowercase attribute name was used that had a package-specific
2263handler. That name might have a meaning to Perl itself some day, even though
2264it doesn't yet. Perhaps you should use a mixed-case attribute name, instead.
6df41af2
GS
2265See L<attributes>.
2266
a0d0e21e
LW
2267=item page overflow
2268
e476b1b5 2269(W io) A single call to write() produced more lines than can fit on a page.
a0d0e21e
LW
2270See L<perlform>.
2271
6df41af2
GS
2272=item panic: %s
2273
2274(P) An internal error.
2275
a0d0e21e
LW
2276=item panic: ck_grep
2277
2278(P) Failed an internal consistency check trying to compile a grep.
2279
2280=item panic: ck_split
2281
2282(P) Failed an internal consistency check trying to compile a split.
2283
2284=item panic: corrupt saved stack index
2285
2286(P) The savestack was requested to restore more localized values than there
2287are in the savestack.
2288
810b8aa5
GS
2289=item panic: del_backref
2290
2291(P) Failed an internal consistency check while trying to reset a weak
2292reference.
2293
a0d0e21e
LW
2294=item panic: die %s
2295
2296(P) We popped the context stack to an eval context, and then discovered
2297it wasn't an eval context.
2298
2299=item panic: do_match
2300
2301(P) The internal pp_match() routine was called with invalid operational data.
2302
2303=item panic: do_split
2304
2305(P) Something terrible went wrong in setting up for the split.
2306
2307=item panic: do_subst
2308
2309(P) The internal pp_subst() routine was called with invalid operational data.
2310
2311=item panic: do_trans
2312
2313(P) The internal do_trans() routine was called with invalid operational data.
2314
c635e13b
PP
2315=item panic: frexp
2316
2317(P) The library function frexp() failed, making printf("%f") impossible.
2318
a0d0e21e
LW
2319=item panic: goto
2320
2321(P) We popped the context stack to a context with the specified label,
2322and then discovered it wasn't a context we know how to do a goto in.
2323
2324=item panic: INTERPCASEMOD
2325
2326(P) The lexer got into a bad state at a case modifier.
2327
2328=item panic: INTERPCONCAT
2329
2330(P) The lexer got into a bad state parsing a string with brackets.
2331
e446cec8
IZ
2332=item panic: kid popen errno read
2333
2334(F) forked child returned an incomprehensible message about its errno.
2335
a0d0e21e
LW
2336=item panic: last
2337
2338(P) We popped the context stack to a block context, and then discovered
2339it wasn't a block context.
2340
2341=item panic: leave_scope clearsv
2342
5f05dabc 2343(P) A writable lexical variable became read-only somehow within the scope.
a0d0e21e
LW
2344
2345=item panic: leave_scope inconsistency
2346
2347(P) The savestack probably got out of sync. At least, there was an
2348invalid enum on the top of it.
2349
810b8aa5
GS
2350=item panic: magic_killbackrefs
2351
2352(P) Failed an internal consistency check while trying to reset all weak
2353references to an object.
2354
6df41af2
GS
2355=item panic: malloc
2356
2357(P) Something requested a negative number of bytes of malloc.
2358
a0d0e21e
LW
2359=item panic: mapstart
2360
2361(P) The compiler is screwed up with respect to the map() function.
2362
2363=item panic: null array
2364
2365(P) One of the internal array routines was passed a null AV pointer.
2366
2367=item panic: pad_alloc
2368
2369(P) The compiler got confused about which scratch pad it was allocating
2370and freeing temporaries and lexicals from.
2371
2372=item panic: pad_free curpad
2373
2374(P) The compiler got confused about which scratch pad it was allocating
2375and freeing temporaries and lexicals from.
2376
2377=item panic: pad_free po
2378
2379(P) An invalid scratch pad offset was detected internally.
2380
2381=item panic: pad_reset curpad
2382
2383(P) The compiler got confused about which scratch pad it was allocating
2384and freeing temporaries and lexicals from.
2385
2386=item panic: pad_sv po
2387
2388(P) An invalid scratch pad offset was detected internally.
2389
2390=item panic: pad_swipe curpad
2391
2392(P) The compiler got confused about which scratch pad it was allocating
2393and freeing temporaries and lexicals from.
2394
2395=item panic: pad_swipe po
2396
2397(P) An invalid scratch pad offset was detected internally.
2398
2399=item panic: pp_iter
2400
2401(P) The foreach iterator got called in a non-loop context frame.
2402
2403=item panic: realloc
2404
2405(P) Something requested a negative number of bytes of realloc.
2406
2407=item panic: restartop
2408
2409(P) Some internal routine requested a goto (or something like it), and
2410didn't supply the destination.
2411
2412=item panic: return
2413
2414(P) We popped the context stack to a subroutine or eval context, and
2415then discovered it wasn't a subroutine or eval context.
2416
2417=item panic: scan_num
2418
2419(P) scan_num() got called on something that wasn't a number.
2420
2421=item panic: sv_insert
2422
2423(P) The sv_insert() routine was told to remove more string than there
2424was string.
2425
2426=item panic: top_env
2427
6224f72b 2428(P) The compiler attempted to do a goto, or something weird like that.
a0d0e21e
LW
2429
2430=item panic: yylex
2431
2432(P) The lexer got into a bad state while processing a case modifier.
2433
7b8d334a 2434=item Parentheses missing around "%s" list
a0d0e21e 2435
e476b1b5 2436(W parenthesis) You said something like
a0d0e21e
LW
2437
2438 my $foo, $bar = @_;
2439
2440when you meant
2441
2442 my ($foo, $bar) = @_;
2443
54884818 2444Remember that "my", "our", and "local" bind tighter than comma.
a0d0e21e 2445
75b44862 2446=item Perl %s required--this is only version %s, stopped
a0d0e21e
LW
2447
2448(F) The module in question uses features of a version of Perl more recent
2449than the currently running version. How long has it been since you upgraded,
2450anyway? See L<perlfunc/require>.
2451
6df41af2
GS
2452=item PERL_SH_DIR too long
2453
2454(F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the
2455C<sh>-shell in. See "PERL_SH_DIR" in F<README.os2>.
2456
2457=item perl: warning: Setting locale failed.
2458
2459(S) The whole warning message will look something like:
2460
2461 perl: warning: Setting locale failed.
2462 perl: warning: Please check that your locale settings:
2463 LC_ALL = "En_US",
2464 LANG = (unset)
2465 are supported and installed on your system.
2466 perl: warning: Falling back to the standard locale ("C").
2467
2468Exactly what were the failed locale settings varies. In the above the
2469settings were that the LC_ALL was "En_US" and the LANG had no value.
2470This error means that Perl detected that you and/or your system
2471administrator have set up the so-called variable system but Perl could
2472not use those settings. This was not dead serious, fortunately: there
2473is a "default locale" called "C" that Perl can and will use, the
2474script will be run. Before you really fix the problem, however, you
2475will get the same error message each time you run Perl. How to really
2476fix the problem can be found in L<perllocale> section B<LOCALE PROBLEMS>.
2477
a0d0e21e
LW
2478=item Permission denied
2479
2480(F) The setuid emulator in suidperl decided you were up to no good.
2481
bd3fa61c 2482=item pid %x not a child
748a9306 2483
75b44862
GS
2484(W exec) A warning peculiar to VMS. Waitpid() was asked to wait for a process
2485which isn't a subprocess of the current process. While this is fine from VMS'
748a9306
LW
2486perspective, it's probably not what you intended.
2487
a0d0e21e
LW
2488=item POSIX getpgrp can't take an argument
2489
81777298 2490(F) Your system has POSIX getpgrp(), which takes no argument, unlike
a0d0e21e
LW
2491the BSD version, which takes a pid.
2492
bbce6d69
PP
2493=item Possible attempt to put comments in qw() list
2494
e476b1b5 2495(W qw) qw() lists contain items separated by whitespace; as with literal
75b44862
GS
2496strings, comment characters are not ignored, but are instead treated as
2497literal data. (You may have used different delimiters than the parentheses
2498shown here; braces are also frequently used.)
bbce6d69 2499
774d564b
PP
2500You probably wrote something like this:
2501
54310121 2502 @list = qw(
774d564b 2503 a # a comment
bbce6d69 2504 b # another comment
774d564b 2505 );
bbce6d69
PP
2506
2507when you should have written this:
2508
774d564b 2509 @list = qw(
54310121
PP
2510 a
2511 b
774d564b
PP
2512 );
2513
2514If you really want comments, build your list the
2515old-fashioned way, with quotes and commas:
2516
2517 @list = (
2518 'a', # a comment
2519 'b', # another comment
2520 );
bbce6d69
PP
2521
2522=item Possible attempt to separate words with commas
2523
e476b1b5 2524(W qw) qw() lists contain items separated by whitespace; therefore commas
68dc0745 2525aren't needed to separate the items. (You may have used different
774d564b
PP
2526delimiters than the parentheses shown here; braces are also frequently
2527used.)
bbce6d69 2528
54310121 2529You probably wrote something like this:
bbce6d69 2530
774d564b
PP
2531 qw! a, b, c !;
2532
2533which puts literal commas into some of the list items. Write it without
2534commas if you don't want them to appear in your data:
bbce6d69 2535
774d564b 2536 qw! a b c !;
bbce6d69 2537
a0d0e21e
LW
2538=item Possible memory corruption: %s overflowed 3rd argument
2539
2540(F) An ioctl() or fcntl() returned more than Perl was bargaining for.
2541Perl guesses a reasonable buffer size, but puts a sentinel byte at the
2542end of the buffer just in case. This sentinel byte got clobbered, and
2543Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>.
2544
6df41af2
GS
2545=item Possible Y2K bug: %s
2546
2547(W y2k) You are concatenating the number 19 with another number, which
2548could be a potential Year 2000 problem.
2549
8cd79558
GS
2550=item pragma "attrs" is deprecated, use "sub NAME : ATTRS" instead
2551
4375e838 2552(W deprecated) You have written something like this:
8cd79558
GS
2553
2554 sub doit
2555 {
2556 use attrs qw(locked);
2557 }
2558
2559You should use the new declaration syntax instead.
2560
2561 sub doit : locked
2562 {
2563 ...
2564
2565The C<use attrs> pragma is now obsolete, and is only provided for
2566backward-compatibility. See L<perlsub/"Subroutine Attributes">.
2567
a0d0e21e
LW
2568=item Precedence problem: open %s should be open(%s)
2569
e476b1b5 2570(S precedence) The old irregular construct
cb1a09d0 2571
a0d0e21e
LW
2572 open FOO || die;
2573
2574is now misinterpreted as
2575
2576 open(FOO || die);
2577
68dc0745
PP
2578because of the strict regularization of Perl 5's grammar into unary
2579and list operators. (The old open was a little of both.) You must
2580put parentheses around the filehandle, or use the new "or" operator
2581instead of "||".
a0d0e21e 2582
3cdd684c
TP
2583=item Premature end of script headers
2584
2585See Server error.
2586
6df41af2
GS
2587=item printf() on closed filehandle %s
2588
75b44862
GS
2589(W closed) The filehandle you're writing to got itself closed sometime before
2590now. Check your logic flow.
6df41af2 2591
9a7dcd9c 2592=item print() on closed filehandle %s
a0d0e21e 2593
75b44862
GS
2594(W closed) The filehandle you're printing on got itself closed sometime before
2595now. Check your logic flow.
a0d0e21e 2596
6df41af2 2597=item Process terminated by SIG%s
a0d0e21e 2598
6df41af2
GS
2599(W) This is a standard message issued by OS/2 applications, while *nix
2600applications die in silence. It is considered a feature of the OS/2
2601port. One can easily disable this by appropriate sighandlers, see
2602L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT"
2603in F<README.os2>.
a0d0e21e 2604
3fe9a6f1 2605=item Prototype mismatch: %s vs %s
4633a7c4 2606
e476b1b5 2607(S unsafe) The subroutine being declared or defined had previously been declared
3fe9a6f1 2608or defined with a different function prototype.
4633a7c4 2609
89ea2908
GA
2610=item Range iterator outside integer range
2611
2612(F) One (or both) of the numeric arguments to the range operator ".."
2613are outside the range which can be represented by integers internally.
2614One possible workaround is to force Perl to use magical string
2615increment by prepending "0" to your numbers.
2616
9a7dcd9c 2617=item readline() on closed filehandle %s
a0d0e21e 2618
75b44862
GS
2619(W closed) The filehandle you're reading from got itself closed sometime
2620before now. Check your logic flow.
a0d0e21e 2621
6df41af2
GS
2622=item Reallocation too large: %lx
2623
2624(F) You can't allocate more than 64K on an MS-DOS machine.
2625
4ad56ec9
IZ
2626=item realloc() of freed memory ignored
2627
e476b1b5 2628(S malloc) An internal routine called realloc() on something that had already
4ad56ec9
IZ
2629been freed.
2630
a0d0e21e
LW
2631=item Recompile perl with B<-D>DEBUGGING to use B<-D> switch
2632
e476b1b5 2633(F debugging) You can't use the B<-D> option unless the code to produce the
a0d0e21e
LW
2634desired output is compiled into Perl, which entails some overhead,
2635which is why it's currently left out of your copy.
2636
3e0ccd42 2637=item Recursive inheritance detected in package '%s'
a0d0e21e
LW
2638
2639(F) More than 100 levels of inheritance were used. Probably indicates
2640an unintended loop in your inheritance hierarchy.
2641
3e0ccd42
JP
2642=item Recursive inheritance detected while looking for method '%s' in package '%s'
2643
2644(F) More than 100 levels of inheritance were encountered while invoking a
2645method. Probably indicates an unintended loop in your inheritance hierarchy.
2646
1930e939
TP
2647=item Reference found where even-sized list expected
2648
e476b1b5 2649(W misc) You gave a single reference where Perl was expecting a list with
1930e939
TP
2650an even number of elements (for assignment to a hash). This
2651usually means that you used the anon hash constructor when you meant
2652to use parens. In any case, a hash requires key/value B<pairs>.
7b8d334a
GS
2653
2654 %hash = { one => 1, two => 2, }; # WRONG
2655 %hash = [ qw/ an anon array / ]; # WRONG
2656 %hash = ( one => 1, two => 2, ); # right
2657 %hash = qw( one 1 two 2 ); # also fine
2658
810b8aa5
GS
2659=item Reference is already weak
2660
e476b1b5 2661(W misc) You have attempted to weaken a reference that is already weak.
810b8aa5
GS
2662Doing so has no effect.
2663
a0d0e21e
LW
2664=item Reference miscount in sv_replace()
2665
e476b1b5 2666(W internal) The internal sv_replace() function was handed a new SV with a
a0d0e21e
LW
2667reference count of other than 1.
2668
2669=item regexp memory corruption
2670
2671(P) The regular expression engine got confused by what the regular
2672expression compiler gave it.
2673
6df41af2
GS
2674=item regexp *+ operand could be empty
2675
2676(F) The part of the regexp subject to either the * or + quantifier
2677could match an empty string.
2678
a0d0e21e
LW
2679=item regexp out of space
2680
2681(P) A "can't happen" error, because safemalloc() should have caught it earlier.
2682
7a95317d
GS
2683=item Repeat count in pack overflows
2684
2685(F) You can't specify a repeat count so large that it overflows
2686your signed integers. See L<perlfunc/pack>.
2687
2688=item Repeat count in unpack overflows
2689
2690(F) You can't specify a repeat count so large that it overflows
2691your signed integers. See L<perlfunc/unpack>.
2692
a0d0e21e
LW
2693=item Reversed %s= operator
2694
e476b1b5 2695(W syntax) You wrote your assignment operator backwards. The = must always
a0d0e21e
LW
2696comes last, to avoid ambiguity with subsequent unary operators.
2697
2698=item Runaway format
2699
2700(F) Your format contained the ~~ repeat-until-blank sequence, but it
2701produced 200 lines at once, and the 200th line looked exactly like the
2702199th line. Apparently you didn't arrange for the arguments to exhaust
2703themselves, either by using ^ instead of @ (for scalar variables), or by
2704shifting or popping (for array variables). See L<perlform>.
2705
2706=item Scalar value @%s[%s] better written as $%s[%s]
2707
75b44862
GS
2708(W syntax) You've used an array slice (indicated by @) to select a single
2709element of an array. Generally it's better to ask for a scalar value
2710(indicated by $). The difference is that C<$foo[&bar]> always behaves like a
2711scalar, both when assigning to it and when evaluating its argument, while
2712C<@foo[&bar]> behaves like a list when you assign to it, and provides a list
2713context to its subscript, which can do weird things if you're expecting only
2714one subscript.
a0d0e21e 2715
748a9306 2716On the other hand, if you were actually hoping to treat the array
5f05dabc 2717element as a list, you need to look into how references work, because
748a9306
LW
2718Perl will not magically convert between scalars and lists for you. See
2719L<perlref>.
2720
a6006777
PP
2721=item Scalar value @%s{%s} better written as $%s{%s}
2722
75b44862
GS
2723(W syntax) You've used a hash slice (indicated by @) to select a single
2724element of a hash. Generally it's better to ask for a scalar value (indicated
2725by $). The difference is that C<$foo{&bar}> always behaves like a scalar,
2726both when assigning to it and when evaluating its argument, while
2727C<@foo{&bar}> behaves like a list when you assign to it, and provides a list
2728context to its subscript, which can do weird things if you're expecting only
2729one subscript.
a6006777
PP
2730
2731On the other hand, if you were actually hoping to treat the hash
2732element as a list, you need to look into how references work, because
2733Perl will not magically convert between scalars and lists for you. See
2734L<perlref>.
2735
a0d0e21e
LW
2736=item Script is not setuid/setgid in suidperl
2737
54310121
PP
2738(F) Oddly, the suidperl program was invoked on a script without a setuid
2739or setgid bit set. This doesn't make much sense.
a0d0e21e
LW
2740
2741=item Search pattern not terminated
2742
2743(F) The lexer couldn't find the final delimiter of a // or m{}
2744construct. Remember that bracketing delimiters count nesting level.
fb73857a 2745Missing the leading C<$> from a variable C<$m> may cause this error.
a0d0e21e 2746
96e4d5b1 2747=item %sseek() on unopened file
a0d0e21e 2748
75b44862
GS
2749(W unopened) You tried to use the seek() or sysseek() function on a filehandle
2750that was either never opened or has since been closed.
a0d0e21e
LW
2751
2752=item select not implemented
2753
2754(F) This machine doesn't implement the select() system call.
2755
6df41af2 2756=item Semicolon seems to be missing
a0d0e21e 2757
75b44862
GS
2758(W semicolon) A nearby syntax error was probably caused by a missing
2759semicolon, or possibly some other missing operator, such as a comma.
a0d0e21e
LW
2760
2761=item semi-panic: attempt to dup freed string
2762
e476b1b5 2763(S internal) The internal newSVsv() routine was called to duplicate a scalar
a0d0e21e
LW
2764that had previously been marked as free.
2765
6df41af2 2766=item sem%s not implemented
a0d0e21e 2767
6df41af2 2768(F) You don't have System V semaphore IPC on your system.
a0d0e21e 2769
69282e91 2770=item send() on closed socket %s
a0d0e21e 2771
e476b1b5 2772(W closed) The socket you're sending to got itself closed sometime before now.
a0d0e21e
LW
2773Check your logic flow.
2774
1b1626e4 2775=item Sequence (? incomplete
7b8d334a 2776
1b1626e4
G
2777(F) A regular expression ended with an incomplete extension (?.
2778See L<perlre>.
2779
a0d0e21e
LW
2780=item Sequence (?%s...) not implemented
2781
2782(F) A proposed regular expression extension has the character reserved
2783but has not yet been written. See L<perlre>.
2784
2785=item Sequence (?%s...) not recognized
2786
2787(F) You used a regular expression extension that doesn't make sense.
2788See L<perlre>.
2789
6df41af2
GS
2790=item Sequence (?#... not terminated
2791
2792(F) A regular expression comment must be terminated by a closing
2793parenthesis. Embedded parentheses aren't allowed. See L<perlre>.
2794
2795=item 500 Server error
2796
2797See Server error.
2798
a5f75d66
AD
2799=item Server error
2800
3cdd684c
TP
2801This is the error message generally seen in a browser window when trying
2802to run a CGI program (including SSI) over the web. The actual error
2803text varies widely from server to server. The most frequently-seen
2804variants are "500 Server error", "Method (something) not permitted",
2805"Document contains no data", "Premature end of script headers", and
2806"Did not produce a valid header".
9607fc9c
PP
2807
2808B<This is a CGI error, not a Perl error>.
2809
2810You need to make sure your script is executable, is accessible by the user
2811CGI is running the script under (which is probably not the user account you
2812tested it under), does not rely on any environment variables (like PATH)
2813from the user it isn't running under, and isn't in a location where the CGI
2814server can't find it, basically, more or less. Please see the following
2815for more information:
2816
be94a901
GS
2817 http://www.perl.com/CPAN/doc/FAQs/cgi/idiots-guide.html
2818 http://www.perl.com/CPAN/doc/FAQs/cgi/perl-cgi-faq.html
9607fc9c
PP
2819 ftp://rtfm.mit.edu/pub/usenet/news.answers/www/cgi-faq
2820 http://hoohoo.ncsa.uiuc.edu/cgi/interface.html
2821 http://www-genome.wi.mit.edu/WWW/faqs/www-security-faq.html
a5f75d66 2822
be94a901
GS
2823You should also look at L<perlfaq9>.
2824
a0d0e21e
LW
2825=item setegid() not implemented
2826
8b1a09fc 2827(F) You tried to assign to C<$)>, and your operating system doesn't support
a0d0e21e
LW
2828the setegid() system call (or equivalent), or at least Configure didn't
2829think so.
2830
2831=item seteuid() not implemented
2832
c47ff5f1 2833(F) You tried to assign to C<< $> >>, and your operating system doesn't support
a0d0e21e
LW
2834the seteuid() system call (or equivalent), or at least Configure didn't
2835think so.
2836
81777298
GS
2837=item setpgrp can't take arguments
2838
2839(F) Your system has the setpgrp() from BSD 4.2, which takes no arguments,
2840unlike POSIX setpgid(), which takes a process ID and process group ID.
2841
a0d0e21e
LW
2842=item setrgid() not implemented
2843
8b1a09fc 2844(F) You tried to assign to C<$(>, and your operating system doesn't support
a0d0e21e
LW
2845the setrgid() system call (or equivalent), or at least Configure didn't
2846think so.
2847
2848=item setruid() not implemented
2849
c47ff5f1 2850(F) You tried to assign to C<$<>, and your operating system doesn't support
a0d0e21e
LW
2851the setruid() system call (or equivalent), or at least Configure didn't
2852think so.
2853
6df41af2
GS
2854=item setsockopt() on closed socket %s
2855
2856(W closed) You tried to set a socket option on a closed socket. Did
2857you forget to check the return value of your socket() call? See
2858L<perlfunc/setsockopt>.
2859
a0d0e21e
LW
2860=item Setuid/gid script is writable by world
2861
2862(F) The setuid emulator won't run a script that is writable by the world,
2863because the world might have written on it already.
2864
2865=item shm%s not implemented
2866
2867(F) You don't have System V shared memory IPC on your system.
2868
6df41af2
GS
2869=item <> should be quotes
2870
2871(F) You wrote C<< require <file> >> when you should have written
2872C<require 'file'>.
2873
2874=item /%s/ should probably be written as "%s"
2875
2876(W syntax) You have used a pattern where Perl expected to find a string,
2877as in the first argument to C<join>. Perl will treat the true
2878or false result of matching the pattern against $_ as the string,
2879which is probably not what you had in mind.
2880
69282e91 2881=item shutdown() on closed socket %s
a0d0e21e 2882
75b44862
GS
2883(W closed) You tried to do a shutdown on a closed socket. Seems a bit
2884superfluous.
a0d0e21e 2885
f86702cc 2886=item SIG%s handler "%s" not defined
a0d0e21e 2887
75b44862
GS
2888(W signal) The signal handler named in %SIG doesn't, in fact, exist. Perhaps
2889you put it into the wrong package?
a0d0e21e
LW
2890
2891=item sort is now a reserved word
2892
2893(F) An ancient error message that almost nobody ever runs into anymore.
2894But before sort was a keyword, people sometimes used it as a filehandle.
2895
2896=item Sort subroutine didn't return a numeric value
2897
2898(F) A sort comparison routine must return a number. You probably blew
c47ff5f1 2899it by not using C<< <=> >> or C<cmp>, or by not using them correctly.
a0d0e21e
LW
2900See L<perlfunc/sort>.
2901
2902=item Sort subroutine didn't return single value
2903
2904(F) A sort comparison subroutine may not return a list value with more
2905or less than one element. See L<perlfunc/sort>.
2906
2907=item Split loop
2908
2909(P) The split was looping infinitely. (Obviously, a split shouldn't iterate
2910more times than there are characters of input, which is what happened.)
2911See L<perlfunc/split>.
2912
a0d0e21e
LW
2913=item Statement unlikely to be reached
2914
e476b1b5 2915(W exec) You did an exec() with some statement after it other than a die().
a0d0e21e
LW
2916This is almost always an error, because exec() never returns unless
2917there was a failure. You probably wanted to use system() instead,
2918which does return. To suppress this warning, put the exec() in a block
2919by itself.
2920
6df41af2
GS
2921=item Stat on unopened file <%s>
2922
2923(W unopened) You tried to use the stat() function (or an equivalent file test)
2924on a filehandle that was either never opened or has since been closed.
2925
17feb5d5
DD
2926=item Strange *+?{} on zero-length expression
2927
e476b1b5 2928(W regexp) You applied a regular expression quantifier in a place where it
75b44862
GS
2929makes no sense, such as on a zero-width assertion. Try putting the quantifier
2930inside the assertion instead. For example, the way to match "abc" provided
2931that it is followed by three repetitions of "xyz" is C</abc(?=(?:xyz){3})/>,
2932not C</abc(?=xyz){3}/>.
17feb5d5 2933
e7ea3e70
IZ
2934=item Stub found while resolving method `%s' overloading `%s' in package `%s'
2935
2936(P) Overloading resolution over @ISA tree may be broken by importation stubs.
4375e838 2937Stubs should never be implicitly created, but explicit calls to C<can>
e7ea3e70
IZ
2938may break this.
2939
a0d0e21e
LW
2940=item Subroutine %s redefined
2941
e476b1b5 2942(W redefine) You redefined a subroutine. To suppress this warning, say
a0d0e21e
LW
2943
2944 {
4438c4b7 2945 no warnings;
a0d0e21e
LW
2946 eval "sub name { ... }";
2947 }
2948
2949=item Substitution loop
2950
2951(P) The substitution was looping infinitely. (Obviously, a
2952substitution shouldn't iterate more times than there are characters of
68dc0745 2953input, which is what happened.) See the discussion of substitution in
5f05dabc 2954L<perlop/"Quote and Quote-like Operators">.
a0d0e21e
LW
2955
2956=item Substitution pattern not terminated
2957
2958(F) The lexer couldn't find the interior delimiter of a s/// or s{}{}
2959construct. Remember that bracketing delimiters count nesting level.
fb73857a 2960Missing the leading C<$> from variable C<$s> may cause this error.
a0d0e21e
LW
2961
2962=item Substitution replacement not terminated
2963
2964(F) The lexer couldn't find the final delimiter of a s/// or s{}{}
2965construct. Remember that bracketing delimiters count nesting level.
fb73857a 2966Missing the leading C<$> from variable C<$s> may cause this error.
a0d0e21e
LW
2967
2968=item substr outside of string
2969
e476b1b5 2970(W substr),(F) You tried to reference a substr() that pointed outside of a
75b44862
GS
2971string. That is, the absolute value of the offset was larger than the length
2972of the string. See L<perlfunc/substr>. This warning is fatal if substr is
2973used in an lvalue context (as the left hand side of an assignment or as a
2974subroutine argument for example).
a0d0e21e 2975
f86702cc 2976=item suidperl is no longer needed since %s
a0d0e21e
LW
2977
2978(F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a
2979version of the setuid emulator somehow got run anyway.
2980
85ab1d1d
JH
2981=item switching effective %s is not implemented
2982
2983(F) While under the C<use filetest> pragma, we cannot switch the
2984real and effective uids or gids.
2985
a0d0e21e
LW
2986=item syntax error
2987
2988(F) Probably means you had a syntax error. Common reasons include:
2989
2990 A keyword is misspelled.
2991 A semicolon is missing.
2992 A comma is missing.
2993 An opening or closing parenthesis is missing.
2994 An opening or closing brace is missing.
2995 A closing quote is missing.
2996
2997Often there will be another error message associated with the syntax
2998error giving more information. (Sometimes it helps to turn on B<-w>.)
2999The error message itself often tells you where it was in the line when
3000it decided to give up. Sometimes the actual error is several tokens
5f05dabc 3001before this, because Perl is good at understanding random input.
a0d0e21e
LW
3002Occasionally the line number may be misleading, and once in a blue moon
3003the only way to figure out what's triggering the error is to call
3004C<perl -c> repeatedly, chopping away half the program each time to see
3005if the error went away. Sort of the cybernetic version of S<20 questions>.
3006
cb1a09d0
AD
3007=item syntax error at line %d: `%s' unexpected
3008
8b1a09fc 3009(A) You've accidentally run your script through the Bourne shell
3a52c276 3010instead of Perl. Check the #! line, or manually feed your script
cb1a09d0
AD
3011into Perl yourself.
3012
6df41af2
GS
3013=item %s syntax OK
3014
3015(F) The final summary message when a C<perl -c> succeeds.
3016
6087ac44 3017=item System V %s is not implemented on this machine
a0d0e21e 3018
6087ac44
JH
3019(F) You tried to do something with a function beginning with "sem",
3020"shm", or "msg" but that System V IPC is not implemented in your
3021machine. In some machines the functionality can exist but be
3022unconfigured. Consult your system support.
a0d0e21e 3023
69282e91 3024=item syswrite() on closed filehandle %s
a0d0e21e 3025
75b44862
GS
3026(W closed) The filehandle you're writing to got itself closed sometime before
3027now. Check your logic flow.
a0d0e21e 3028
fc36a67e
PP
3029=item Target of goto is too deeply nested
3030
3031(F) You tried to use C<goto> to reach a label that was too deeply
3032nested for Perl to reach. Perl is doing you a favor by refusing.
3033
8903cb82 3034=item tell() on unopened file
a0d0e21e 3035
75b44862
GS
3036(W unopened) You tried to use the tell() function on a filehandle that was
3037either never opened or has since been closed.
a0d0e21e 3038
c47ff5f1 3039=item Test on unopened file <%s>
a0d0e21e 3040
75b44862
GS
3041(W unopened) You tried to invoke a file test operator on a filehandle that
3042isn't open. Check your logic. See also L<perlfunc/-X>.
a0d0e21e
LW
3043
3044=item That use of $[ is unsupported
3045
8b1a09fc 3046(F) Assignment to C<$[> is now strictly circumscribed, and interpreted as
5f05dabc 3047a compiler directive. You may say only one of
a0d0e21e
LW
3048
3049 $[ = 0;
3050 $[ = 1;
3051 ...
3052 local $[ = 0;
3053 local $[ = 1;
3054 ...
3055
3056This is to prevent the problem of one module changing the array base
3057out from under another module inadvertently. See L<perlvar/$[>.
3058
f86702cc 3059=item The crypt() function is unimplemented due to excessive paranoia
a0d0e21e
LW
3060
3061(F) Configure couldn't find the crypt() function on your machine,
3062probably because your vendor didn't supply it, probably because they
8b1a09fc 3063think the U.S. Government thinks it's a secret, or at least that they
a0d0e21e
LW
3064will continue to pretend that it is. And if you quote me on that, I
3065will deny it.
3066
6df41af2
GS
3067=item The %s function is unimplemented
3068
3069The function indicated isn't implemented on this architecture, according
3070to the probings of Configure.
3071
a0d0e21e
LW
3072=item The stat preceding C<-l _> wasn't an lstat
3073
3074(F) It makes no sense to test the current stat buffer for symbolic linkhood
3075if the last stat that wrote to the stat buffer already went past
3076the symlink to get to the real file. Use an actual filename instead.
3077
437784d6 3078=item This Perl can't reset CRTL environ elements (%s)
f675dbe5
CB
3079
3080=item This Perl can't set CRTL environ elements (%s=%s)
3081
75b44862
GS
3082(W internal) Warnings peculiar to VMS. You tried to change or delete an
3083element of the CRTL's internal environ array, but your copy of Perl wasn't
f675dbe5
CB
3084built with a CRTL that contained the setenv() function. You'll need to
3085rebuild Perl with a CRTL that does, or redefine F<PERL_ENV_TABLES> (see
3086L<perlvms>) so that the environ array isn't the target of the change to
3087%ENV which produced the warning.
3088
a0d0e21e
LW
3089=item times not implemented
3090
3091(F) Your version of the C library apparently doesn't do times(). I suspect
3092you're not running on Unix.
3093
3094=item Too few args to syscall
3095
3096(F) There has to be at least one argument to syscall() to specify the
3097system call to call, silly dilly.
3098
9607fc9c
PP
3099=item Too late for "B<-T>" option
3100
3101(X) The #! line (or local equivalent) in a Perl script contains the
8cc95fdb
PP
3102B<-T> option, but Perl was not invoked with B<-T> in its command line.
3103This is an error because, by the time Perl discovers a B<-T> in a
3104script, it's too late to properly taint everything from the environment.
3105So Perl gives up.
f86702cc 3106
9607fc9c
PP
3107If the Perl script is being executed as a command using the #!
3108mechanism (or its local equivalent), this error can usually be fixed
3109by editing the #! line so that the B<-T> option is a part of Perl's
3110first argument: e.g. change C<perl -n -T> to C<perl -T -n>.
f86702cc 3111
9607fc9c
PP
3112If the Perl script is being executed as C<perl scriptname>, then the
3113B<-T> option must appear on the command line: C<perl -T scriptname>.
f86702cc 3114
8cc95fdb
PP
3115=item Too late for "-%s" option
3116
3117(X) The #! line (or local equivalent) in a Perl script contains the
3118B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options
3119are not intended for use inside scripts. Use the C<use> pragma instead.
3120
ddda08b7
GS
3121=item Too late to run %s block
3122
3123(W void) A CHECK or INIT block is being defined during run time proper,
3124when the opportunity to run them has already passed. Perhaps you are
3125loading a file with C<require> or C<do> when you should be using
3126C<use> instead. Or perhaps you should put the C<require> or C<do>
3127inside a BEGIN block.
3128
a0d0e21e
LW
3129=item Too many args to syscall
3130
5f05dabc 3131(F) Perl supports a maximum of only 14 args to syscall().
a0d0e21e
LW
3132
3133=item Too many arguments for %s
3134
3135(F) The function requires fewer arguments than you specified.
3136
6df41af2
GS
3137=item Too many )'s
3138
3139(A) You've accidentally run your script through B<csh> instead
3140of Perl. Check the #! line, or manually feed your script into
3141Perl yourself.
3142
3143=item Too many ('s
3144
a0d0e21e
LW
3145=item trailing \ in regexp
3146
3147(F) The regular expression ends with an unbackslashed backslash. Backslash
3148it. See L<perlre>.
3149
2c268ad5 3150=item Transliteration pattern not terminated
a0d0e21e
LW
3151
3152(F) The lexer couldn't find the interior delimiter of a tr/// or tr[][]
fb73857a
PP
3153or y/// or y[][] construct. Missing the leading C<$> from variables
3154C<$tr> or C<$y> may cause this error.
a0d0e21e 3155
2c268ad5 3156=item Transliteration replacement not terminated
a0d0e21e
LW
3157
3158(F) The lexer couldn't find the final delimiter of a tr/// or tr[][]
3159construct.
3160
3161=item truncate not implemented
3162
3163(F) Your machine doesn't implement a file truncation mechanism that
3164Configure knows about.
3165
3166=item Type of arg %d to %s must be %s (not %s)
3167
3168(F) This function requires the argument in that position to be of a
8b1a09fc
PP
3169certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be
3170%NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the
a0d0e21e
LW
3171{EXPR} forms as an explicit dereference. See L<perlref>.
3172
3173=item umask: argument is missing initial 0
3174
e476b1b5 3175(W umask) A umask of 222 is incorrect. It should be 0222, because octal
eec2d3df
GS
3176literals always start with 0 in Perl, as in C.
3177
3178=item umask not implemented
3179
3180(F) Your machine doesn't implement the umask function and you tried
3181to use it to restrict permissions for yourself (EXPR & 0700).
a0d0e21e 3182
4633a7c4
LW
3183=item Unable to create sub named "%s"
3184
3185(F) You attempted to create or access a subroutine with an illegal name.
3186
a0d0e21e
LW
3187=item Unbalanced context: %d more PUSHes than POPs
3188
75b44862
GS
3189(W internal) The exit code detected an internal inconsistency in how many
3190execution contexts were entered and left.
a0d0e21e
LW
3191
3192=item Unbalanced saves: %d more saves than restores
3193
e476b1b5 3194(W internal) The exit code detected an internal inconsistency in how many
a0d0e21e
LW
3195values were temporarily localized.
3196
3197=item Unbalanced scopes: %d more ENTERs than LEAVEs
3198
75b44862
GS
3199(W internal) The exit code detected an internal inconsistency in how many
3200blocks were entered and left.
a0d0e21e
LW
3201
3202=item Unbalanced tmps: %d more allocs than frees
3203
75b44862
GS
3204(W internal) The exit code detected an internal inconsistency in how many
3205mortal scalars were allocated and freed.
a0d0e21e
LW
3206
3207=item Undefined format "%s" called
3208
3209(F) The format indicated doesn't seem to exist. Perhaps it's really in
3210another package? See L<perlform>.
3211
3212=item Undefined sort subroutine "%s" called
3213
3214(F) The sort comparison routine specified doesn't seem to exist. Perhaps
3215it's in a different package? See L<perlfunc/sort>.
3216
3217=item Undefined subroutine &%s called
3218
3219(F) The subroutine indicated hasn't been defined, or if it was, it
3220has since been undefined.
3221
3222=item Undefined subroutine called
3223
3224(F) The anonymous subroutine you're trying to call hasn't been defined,
3225or if it was, it has since been undefined.
3226
3227=item Undefined subroutine in sort
3228
3229(F) The sort comparison routine specified is declared but doesn't seem to
3230have been defined yet. See L<perlfunc/sort>.
3231
4633a7c4
LW
3232=item Undefined top format "%s" called
3233
3234(F) The format indicated doesn't seem to exist. Perhaps it's really in
3235another package? See L<perlform>.
3236
20408e3c
GS
3237=item Undefined value assigned to typeglob
3238
e476b1b5 3239(W misc) An undefined value was assigned to a typeglob, a la C<*foo = undef>.
20408e3c
GS
3240This does nothing. It's possible that you really mean C<undef *foo>.
3241
6df41af2
GS
3242=item %s: Undefined variable
3243
3244(A) You've accidentally run your script through B<csh> instead
3245of Perl. Check the #! line, or manually feed your script into
3246Perl yourself.
3247
a0d0e21e
LW
3248=item unexec of %s into %s failed!
3249
3250(F) The unexec() routine failed for some reason. See your local FSF
3251representative, who probably put it there in the first place.
3252
3253=item Unknown BYTEORDER
3254
5f05dabc 3255(F) There are no byte-swapping functions for a machine with this byte order.
a0d0e21e 3256
6170680b
IZ
3257=item Unknown open() mode '%s'
3258
437784d6 3259(F) The second argument of 3-argument open() is not among the list
c47ff5f1
GS
3260of valid modes: C<< < >>, C<< > >>, C<<< >> >>>, C<< +< >>,
3261C<< +> >>, C<<< +>> >>>, C<-|>, C<|->.
6170680b 3262
f675dbe5
CB
3263=item Unknown process %x sent message to prime_env_iter: %s
3264
3265(P) An error peculiar to VMS. Perl was reading values for %ENV before
3266iterating over it, and someone else stuck a message in the stream of
3267data Perl expected. Someone's very confused, or perhaps trying to
3268subvert Perl's population of %ENV for nefarious purposes.
3269
6df41af2
GS
3270=item unmatched [] in regexp
3271
3272(F) The brackets around a character class must match. If you wish to
3273include a closing bracket in a character class, backslash it or put it first.
3274See L<perlre>.
3275
a0d0e21e
LW
3276=item unmatched () in regexp
3277
3278(F) Unbackslashed parentheses must always be balanced in regular
3279expressions. If you're a vi user, the % key is valuable for finding
5f05dabc 3280the matching parenthesis. See L<perlre>.
a0d0e21e 3281
d98d5fff 3282=item Unmatched right %s bracket
a0d0e21e 3283
d98d5fff
GS
3284(F) The lexer counted more closing curly or square brackets than
3285opening ones, so you're probably missing a matching opening bracket.
3286As a general rule, you'll find the missing one (so to speak) near the
3287place you were last editing.
a0d0e21e 3288
a0d0e21e
LW
3289=item Unquoted string "%s" may clash with future reserved word
3290
75b44862
GS
3291(W reserved) You used a bareword that might someday be claimed as a reserved
3292word. It's best to put such a word in quotes, or capitalize it somehow, or
3293insert an underbar into it. You might also declare it as a subroutine.
a0d0e21e 3294
54310121 3295=item Unrecognized character %s
a0d0e21e 3296
54310121
PP
3297(F) The Perl parser has no idea what to do with the specified character
3298in your Perl script (or eval). Perhaps you tried to run a compressed
3299script, a binary program, or a directory as a Perl program.
a0d0e21e 3300
6df41af2
GS
3301=item /%s/: Unrecognized escape \\%c in character class passed through
3302
3303(W regexp) You used a backslash-character combination which is not recognized
3304by Perl inside character classes. The character was understood literally.
3305
3306=item /%s/: Unrecognized escape \\%c passed through
3307
3308(W regexp) You used a backslash-character combination which is not recognized
3309by Perl. This combination appears in an interpolated variable or a
3310C<'>-delimited regular expression. The character was understood literally.
3311
c9f97d15
IZ
3312=item Unrecognized escape \\%c passed through
3313
e476b1b5 3314(W misc) You used a backslash-character combination which is not recognized
c9f97d15
IZ
3315by Perl.
3316
a0d0e21e
LW
3317=item Unrecognized signal name "%s"
3318
3319(F) You specified a signal name to the kill() function that was not recognized.
3320Say C<kill -l> in your shell to see the valid signal names on your system.
3321
90248788 3322=item Unrecognized switch: -%s (-h will show valid options)
a0d0e21e
LW
3323
3324(F) You specified an illegal option to Perl. Don't do that.
3325(If you think you didn't do that, check the #! line to see if it's
3326supplying the bad switch on your behalf.)
3327
3328=item Unsuccessful %s on filename containing newline
3329
e476b1b5 3330(W newline) A file operation was attempted on a filename, and that operation
a0d0e21e 3331failed, PROBABLY because the filename contained a newline, PROBABLY
54310121 3332because you forgot to chop() or chomp() it off. See L<perlfunc/chomp>.
a0d0e21e
LW
3333
3334=item Unsupported directory function "%s" called
3335
3336(F) Your machine doesn't support opendir() and readdir().
3337
6df41af2
GS
3338=item Unsupported function %s
3339
3340(F) This machine doesn't implement the indicated function, apparently.
3341At least, Configure doesn't think so.
3342
54310121
PP
3343=item Unsupported function fork
3344
3345(F) Your version of executable does not support forking.
3346
3347Note that under some systems, like OS/2, there may be different flavors of
3348Perl executables, some of which may support fork, some not. Try changing
3349the name you call Perl by to C<perl_>, C<perl__>, and so on.
3350
a0d0e21e
LW
3351=item Unsupported socket function "%s" called
3352
3353(F) Your machine doesn't support the Berkeley socket mechanism, or at
3354least that's what Configure thought.
3355
6df41af2 3356=item Unterminated attribute list
a0d0e21e 3357
6df41af2
GS
3358(F) The lexer found something other than a simple identifier at the start
3359of an attribute, and it wasn't a semicolon or the start of a
3360block. Perhaps you terminated the parameter list of the previous attribute
3361too soon. See L<attributes>.
a0d0e21e 3362
09bef843
SB
3363=item Unterminated attribute parameter in attribute list
3364
3365(F) The lexer saw an opening (left) parenthesis character while parsing an
3366attribute list, but the matching closing (right) parenthesis
3367character was not found. You may need to add (or remove) a backslash
3368character to get your parentheses to balance. See L<attributes>.
3369
6df41af2 3370=item Unterminated <> operator
09bef843 3371
6df41af2
GS
3372(F) The lexer saw a left angle bracket in a place where it was expecting
3373a term, so it's looking for the corresponding right angle bracket, and not
3374finding it. Chances are you left some needed parentheses out earlier in
3375the line, and you really meant a "less than".
09bef843 3376
6df41af2 3377=item untie attempted while %d inner references still exist
a0d0e21e 3378
6df41af2
GS
3379(W untie) A copy of the object returned from C<tie> (or C<tied>) was still
3380valid when C<untie> was called.
a0d0e21e 3381
6df41af2 3382=item Useless use of %s in void context
a0d0e21e 3383
75b44862
GS
3384(W void) You did something without a side effect in a context that does
3385nothing with the return value, such as a statement that doesn't return a value
3386from a block, or the left side of a scalar comma operator. Very often this
3387points not to stupidity on your part, but a failure of Perl to parse your
3388program the way you thought it would. For example, you'd get this if you
3389mixed up your C precedence with Python precedence and said
a0d0e21e 3390
6df41af2 3391 $one, $two = 1, 2;
748a9306 3392
6df41af2
GS
3393when you meant to say
3394
3395 ($one, $two) = (1, 2);
3396
3397Another common error is to use ordinary parentheses to construct a list
3398reference when you should be using square or curly brackets, for
3399example, if you say
3400
3401 $array = (1,2);
3402
3403when you should have said
3404
3405 $array = [1,2];
3406
3407The square brackets explicitly turn a list value into a scalar value,
3408while parentheses do not. So when a parenthesized list is evaluated in
3409a scalar context, the comma is treated like C's comma operator, which
3410throws away the left argument, which is not what you want. See
3411L<perlref> for more on this.
3412
3413=item Useless use of "re" pragma
3414
3415(W) You did C<use re;> without any arguments. That isn't very useful.
3416
3417=item "use" not allowed in expression
3418
3419(F) The "use" keyword is recognized and executed at compile time, and returns
3420no useful value. See L<perlmod>.
748a9306 3421
c47ff5f1 3422=item Use of bare << to mean <<"" is deprecated
4633a7c4 3423
e476b1b5 3424(D deprecated) You are now encouraged to use the explicitly quoted form if you
3fe9a6f1 3425wish to use an empty line as the terminator of the here-document.
4633a7c4 3426
a0d0e21e
LW
3427=item Use of implicit split to @_ is deprecated
3428
e476b1b5 3429(D deprecated) It makes a lot of work for the compiler when you clobber a
a0d0e21e
LW
3430subroutine's argument list, so it's better if you assign the results of
3431a split() explicitly to an array (or list).
3432
dc848c6f
PP
3433=item Use of inherited AUTOLOAD for non-method %s() is deprecated
3434
c47ff5f1
GS
3435(D deprecated) As an (ahem) accidental feature, C<AUTOLOAD> subroutines are
3436looked up as methods (using the C<@ISA> hierarchy) even when the subroutines
3437to be autoloaded were called as plain functions (e.g. C<Foo::bar()>),
3438not as methods (e.g. C<< Foo->bar() >> or C<< $obj->bar() >>).
dc848c6f 3439
75b44862
GS
3440This bug will be rectified in future by using method lookup only for methods'
3441C<AUTOLOAD>s. However, there is a significant base of existing code that may
3442be using the old behavior. So, as an interim step, Perl currently issues an
3443optional warning when non-methods use inherited C<AUTOLOAD>s.
dc848c6f
PP
3444
3445The simple rule is: Inheritance will not work when autoloading
3446non-methods. The simple fix for old code is: In any module that used to
3447depend on inheriting C<AUTOLOAD> for non-methods from a base class named
3448C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during startup.
3449
fb73857a
PP
3450In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> you
3451should remove AutoLoader from @ISA and change C<use AutoLoader;> to
7b8d334a 3452C<use AutoLoader 'AUTOLOAD';>.
fb73857a 3453
6df41af2
GS
3454=item Use of %s in printf format not supported
3455
3456(F) You attempted to use a feature of printf that is accessible from
3457only C. This usually means there's a better way to do it in Perl.
3458
3459=item Use of $* is deprecated
3460
75b44862
GS
3461(D deprecated) This variable magically turned on multi-line pattern matching,
3462both for you and for any luckless subroutine that you happen to call. You
3463should use the new C<//m> and C<//s> modifiers now to do that without the
3464dangerous action-at-a-distance effects of C<$*>.
6df41af2
GS
3465
3466=item Use of %s is deprecated
3467
75b44862
GS
3468(D deprecated) The construct indicated is no longer recommended for use,
3469generally because there's a better way to do it, and also because the old way
3470has bad side effects.
6df41af2
GS
3471
3472=item Use of $# is deprecated
3473
75b44862
GS
3474(D deprecated) This was an ill-advised attempt to emulate a poorly defined
3475B<awk> feature. Use an explicit printf() or sprintf() instead.
6df41af2 3476
85b81015
LW
3477=item Use of reserved word "%s" is deprecated
3478
75b44862
GS
3479(D deprecated) The indicated bareword is a reserved word. Future versions of
3480perl may use it as a keyword, so you're better off either explicitly quoting
3481the word in a manner appropriate for its context of use, or using a different
3482name altogether. The warning can be suppressed for subroutine names by either
3483adding a C<&> prefix, or using a package qualifier, e.g. C<&our()>, or
3484C<Foo::our()>.
85b81015 3485
cc95b072 3486=item Use of uninitialized value%s
a0d0e21e 3487
75b44862
GS
3488(W uninitialized) An undefined value was used as if it were already defined.
3489It was interpreted as a "" or a 0, but maybe it was a mistake. To suppress
3490this warning assign a defined value to your variables.
a0d0e21e 3491
68dc0745 3492=item Value of %s can be "0"; test with defined()
a6006777 3493
75b44862
GS
3494(W misc) In a conditional expression, you used <HANDLE>, <*> (glob),
3495C<each()>, or C<readdir()> as a boolean value. Each of these constructs can
3496return a value of "0"; that would make the conditional expression false, which
3497is probably not what you intended. When using these constructs in conditional
68dc0745 3498expressions, test their values with the C<defined> operator.
a6006777 3499
f675dbe5
CB
3500=item Value of CLI symbol "%s" too long
3501
e476b1b5 3502(W misc) A warning peculiar to VMS. Perl tried to read the value of an %ENV
75b44862
GS
3503element from a CLI symbol table, and found a resultant string longer than 1024
3504characters. The return value has been truncated to 1024 characters.
f675dbe5 3505
9607fc9c 3506=item Variable "%s" is not imported%s
4633a7c4
LW
3507
3508(F) While "use strict" in effect, you referred to a global variable
3509that you apparently thought was imported from another module, because
3510something else of the same name (usually a subroutine) is exported
3511by that module. It usually means you put the wrong funny character
3512on the front of your variable.
3513
6df41af2
GS
3514=item "%s" variable %s masks earlier declaration in same %s
3515
75b44862
GS
3516(W misc) A "my" or "our" variable has been redeclared in the current scope or
3517statement, effectively eliminating all access to the previous instance. This
3518is almost always a typographical error. Note that the earlier variable will
3519still exist until the end of the scope or until all closure referents to it
3520are destroyed.
6df41af2 3521
44a8e56a
PP
3522=item Variable "%s" may be unavailable
3523
e476b1b5 3524(W closure) An inner (nested) I<anonymous> subroutine is inside a I<named>