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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).
12 (S) A severe warning (mandatory).
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
748a9306 18Optional warnings are enabled by using the B<-w> switch. Warnings may
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19be captured by setting C<$SIG{__WARN__}> to a reference to a routine that
20will be called on each warning instead of printing it. See L<perlvar>.
4438c4b7 21
748a9306 22Trappable errors may be trapped using the eval operator. See
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23L<perlfunc/eval>. In almost all cases, warnings may be selectively
24disabled or promoted to fatal errors using the C<warnings> pragma.
25See L<warnings>.
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26
27Some of these messages are generic. Spots that vary are denoted with a %s,
2ba9eb46 28just as in a printf format. Note that some messages start with a %s!
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29Since the messages are listed in alphabetical order, the symbols
30C<"%(-?@> sort before the letters, while C<[> and C<\> sort after.
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31
32=over 4
33
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34=item "my sub" not yet implemented
35
36(F) Lexically scoped subroutines are not yet implemented. Don't try that
37yet.
38
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39=item "my" variable %s can't be in a package
40
41(F) Lexically scoped variables aren't in a package, so it doesn't make sense
42to try to declare one with a package qualifier on the front. Use local()
43if you want to localize a package variable.
44
9fbbe825 45=item "my" variable %s masks earlier declaration in same %s
2ba9eb46 46
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47(W) A lexical variable has been redeclared in the current scope or statement,
48effectively eliminating all access to the previous instance. This is almost
49always a typographical error. Note that the earlier variable will still exist
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50until the end of the scope or until all closure referents to it are
51destroyed.
52
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53=item "no" not allowed in expression
54
55(F) The "no" keyword is recognized and executed at compile time, and returns
56no useful value. See L<perlmod>.
57
58=item "use" not allowed in expression
59
60(F) The "use" keyword is recognized and executed at compile time, and returns
61no useful value. See L<perlmod>.
62
f61d411c 63=item '!' allowed only after types %s
ef54e1a4 64
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65(F) The '!' is allowed in pack() and unpack() only after certain types.
66See L<perlfunc/pack>.
ef54e1a4 67
17f4a12d 68=item / cannot take a count
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69
70(F) You had an unpack template indicating a counted-length string,
71but you have also specified an explicit size for the string.
72See L<perlfunc/pack>.
73
17f4a12d 74=item / must be followed by a, A or Z
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75
76(F) You had an unpack template indicating a counted-length string,
77which must be followed by one of the letters a, A or Z
78to indicate what sort of string is to be unpacked.
79See L<perlfunc/pack>.
80
17f4a12d 81=item / must be followed by a*, A* or Z*
43192e07 82
437784d6 83(F) You had a pack template indicating a counted-length string,
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84Currently the only things that can have their length counted are a*, A* or Z*.
85See L<perlfunc/pack>.
86
17f4a12d 87=item / must follow a numeric type
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88
89(F) You had an unpack template that contained a '#',
90but this did not follow some numeric unpack specification.
91See L<perlfunc/pack>.
92
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93=item % may only be used in unpack
94
5f05dabc 95(F) You can't pack a string by supplying a checksum, because the
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96checksumming process loses information, and you can't go the other
97way. See L<perlfunc/unpack>.
98
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99=item Repeat count in pack overflows
100
101(F) You can't specify a repeat count so large that it overflows
102your signed integers. See L<perlfunc/pack>.
103
104=item Repeat count in unpack overflows
105
106(F) You can't specify a repeat count so large that it overflows
107your signed integers. See L<perlfunc/unpack>.
108
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109=item /%s/: Unrecognized escape \\%c passed through
110
111(W) You used a backslash-character combination which is not recognized
112by Perl. This combination appears in an interpolated variable or a
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113C<'>-delimited regular expression. The character was understood literally.
114
115=item /%s/: Unrecognized escape \\%c in character class passed through
116
117(W) You used a backslash-character combination which is not recognized
118by Perl inside character classes. The character was understood literally.
c9f97d15 119
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120=item /%s/ should probably be written as "%s"
121
122(W) You have used a pattern where Perl expected to find a string,
437784d6 123as in the first argument to C<join>. Perl will treat the true
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124or false result of matching the pattern against $_ as the string,
125which is probably not what you had in mind.
126
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127=item %s (...) interpreted as function
128
129(W) You've run afoul of the rule that says that any list operator followed
8b1a09fc 130by parentheses turns into a function, with all the list operators arguments
5f05dabc 131found inside the parentheses. See L<perlop/Terms and List Operators (Leftward)>.
a0d0e21e 132
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133=item %s() called too early to check prototype
134
135(W) You've called a function that has a prototype before the parser saw a
136definition or declaration for it, and Perl could not check that the call
137conforms to the prototype. You need to either add an early prototype
138declaration for the subroutine in question, or move the subroutine
139definition ahead of the call to get proper prototype checking. Alternatively,
140if you are certain that you're calling the function correctly, you may put
141an ampersand before the name to avoid the warning. See L<perlsub>.
142
8ea97a1e 143=item %s argument is not a HASH or ARRAY element
a0d0e21e 144
8ea97a1e 145(F) The argument to exists() must be a hash or array element, such as:
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146
147 $foo{$bar}
8ea97a1e 148 $ref->[12]->["susie"]
a0d0e21e 149
8ea97a1e 150=item %s argument is not a HASH or ARRAY element or slice
5f05dabc 151
8ea97a1e 152(F) The argument to delete() must be either a hash or array element, such as:
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153
154 $foo{$bar}
8ea97a1e 155 $ref->[12]->["susie"]
5f05dabc 156
8ea97a1e 157or a hash or array slice, such as:
5f05dabc 158
8ea97a1e 159 @foo[$bar, $baz, $xyzzy]
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160 @{$ref->[12]}{"susie", "queue"}
161
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162=item %s argument is not a subroutine name
163
164(F) The argument to exists() for C<exists &sub> must be a subroutine
165name, and not a subroutine call. C<exists &sub()> will generate this error.
166
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167=item %s did not return a true value
168
169(F) A required (or used) file must return a true value to indicate that
170it compiled correctly and ran its initialization code correctly. It's
171traditional to end such a file with a "1;", though any true value would
172do. See L<perlfunc/require>.
173
174=item %s found where operator expected
175
176(S) The Perl lexer knows whether to expect a term or an operator. If it
177sees what it knows to be a term when it was expecting to see an operator,
178it gives you this warning. Usually it indicates that an operator or
179delimiter was omitted, such as a semicolon.
180
f86702cc 181=item %s had compilation errors
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182
183(F) The final summary message when a C<perl -c> fails.
184
f86702cc 185=item %s has too many errors
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186
187(F) The parser has given up trying to parse the program after 10 errors.
188Further error messages would likely be uninformative.
189
190=item %s matches null string many times
191
192(W) The pattern you've specified would be an infinite loop if the
193regular expression engine didn't specifically check for that. See L<perlre>.
194
195=item %s never introduced
196
197(S) The symbol in question was declared but somehow went out of scope
198before it could possibly have been used.
199
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200=item %s package attribute may clash with future reserved word: %s
201
202(W) A lowercase attribute name was used that had a package-specific handler.
203That name might have a meaning to Perl itself some day, even though it
204doesn't yet. Perhaps you should use a mixed-case attribute name, instead.
205See L<attributes>.
206
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207=item %s syntax OK
208
209(F) The final summary message when a C<perl -c> succeeds.
210
f86702cc 211=item %s: Command not found
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212
213(A) You've accidentally run your script through B<csh> instead
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214of Perl. Check the #! line, or manually feed your script into
215Perl yourself.
cb1a09d0 216
f86702cc 217=item %s: Expression syntax
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218
219(A) You've accidentally run your script through B<csh> instead
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220of Perl. Check the #! line, or manually feed your script into
221Perl yourself.
cb1a09d0 222
f86702cc 223=item %s: Undefined variable
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224
225(A) You've accidentally run your script through B<csh> instead
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226of Perl. Check the #! line, or manually feed your script into
227Perl yourself.
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228
229=item %s: not found
230
8b1a09fc 231(A) You've accidentally run your script through the Bourne shell
3a52c276 232instead of Perl. Check the #! line, or manually feed your script
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233into Perl yourself.
234
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235=item (in cleanup) %s
236
237(W) This prefix usually indicates that a DESTROY() method raised
238the indicated exception. Since destructors are usually called by
239the system at arbitrary points during execution, and often a vast
240number of times, the warning is issued only once for any number
241of failures that would otherwise result in the same message being
242repeated.
243
244Failure of user callbacks dispatched using the C<G_KEEPERR> flag
245could also result in this warning. See L<perlcall/G_KEEPERR>.
246
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247=item (Missing semicolon on previous line?)
248
249(S) This is an educated guess made in conjunction with the message "%s
250found where operator expected". Don't automatically put a semicolon on
251the previous line just because you saw this message.
252
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253=item B<-P> not allowed for setuid/setgid script
254
255(F) The script would have to be opened by the C preprocessor by name,
256which provides a race condition that breaks security.
257
258=item C<-T> and C<-B> not implemented on filehandles
259
260(F) Perl can't peek at the stdio buffer of filehandles when it doesn't
261know about your kind of stdio. You'll have to use a filename instead.
262
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263=item C<-p> destination: %s
264
265(F) An error occurred during the implicit output invoked by the C<-p>
266command-line switch. (This output goes to STDOUT unless you've
267redirected it with select().)
268
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269=item 500 Server error
270
271See Server error.
272
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273=item ?+* follows nothing in regexp
274
275(F) You started a regular expression with a quantifier. Backslash it
276if you meant it literally. See L<perlre>.
277
278=item @ outside of string
279
2ba9eb46 280(F) You had a pack template that specified an absolute position outside
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281the string being unpacked. See L<perlfunc/pack>.
282
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283=item <> should be quotes
284
285(F) You wrote C<require E<lt>fileE<gt>> when you should have written
286C<require 'file'>.
287
9a7dcd9c 288=item accept() on closed socket
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289
290(W) You tried to do an accept on a closed socket. Did you forget to check
291the return value of your socket() call? See L<perlfunc/accept>.
292
293=item Allocation too large: %lx
294
54310121 295(X) You can't allocate more than 64K on an MS-DOS machine.
55497cff 296
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297=item Applying %s to %s will act on scalar(%s)
298
2c268ad5 299(W) The pattern match (//), substitution (s///), and transliteration (tr///)
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300operators work on scalar values. If you apply one of them to an array
301or a hash, it will convert the array or hash to a scalar value -- the
302length of an array, or the population info of a hash -- and then work on
303that scalar value. This is probably not what you meant to do. See
304L<perlfunc/grep> and L<perlfunc/map> for alternatives.
305
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306=item Arg too short for msgsnd
307
308(F) msgsnd() requires a string at least as long as sizeof(long).
309
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310=item Ambiguous use of %s resolved as %s
311
312(W)(S) You said something that may not be interpreted the way
313you thought. Normally it's pretty easy to disambiguate it by supplying
5f05dabc 314a missing quote, operator, parenthesis pair or declaration.
748a9306 315
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316=item Ambiguous call resolved as CORE::%s(), qualify as such or use &
317
318(W) A subroutine you have declared has the same name as a Perl keyword,
319and you have used the name without qualification for calling one or the
320other. Perl decided to call the builtin because the subroutine is
321not imported.
322
323To force interpretation as a subroutine call, either put an ampersand
324before the subroutine name, or qualify the name with its package.
325Alternatively, you can import the subroutine (or pretend that it's
326imported with the C<use subs> pragma).
327
328To silently interpret it as the Perl operator, use the C<CORE::> prefix
329on the operator (e.g. C<CORE::log($x)>) or by declaring the subroutine
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330to be an object method (see L<perlsub/"Subroutine Attributes">
331or L<attributes>).
5315574d 332
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333=item Args must match #! line
334
335(F) The setuid emulator requires that the arguments Perl was invoked
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336with match the arguments specified on the #! line. Since some systems
337impose a one-argument limit on the #! line, try combining switches;
338for example, turn C<-w -U> into C<-wU>.
a0d0e21e 339
f86702cc 340=item Argument "%s" isn't numeric%s
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341
342(W) The indicated string was fed as an argument to an operator that
343expected a numeric value instead. If you're fortunate the message
344will identify which operator was so unfortunate.
345
346=item Array @%s missing the @ in argument %d of %s()
347
348(D) Really old Perl let you omit the @ on array names in some spots. This
349is now heavily deprecated.
350
351=item assertion botched: %s
352
353(P) The malloc package that comes with Perl had an internal failure.
354
355=item Assertion failed: file "%s"
356
357(P) A general assertion failed. The file in question must be examined.
358
359=item Assignment to both a list and a scalar
360
361(F) If you assign to a conditional operator, the 2nd and 3rd arguments
362must either both be scalars or both be lists. Otherwise Perl won't
363know which context to supply to the right side.
364
365=item Attempt to free non-arena SV: 0x%lx
366
367(P) All SV objects are supposed to be allocated from arenas that will
368be garbage collected on exit. An SV was discovered to be outside any
369of those arenas.
370
54310121 371=item Attempt to free nonexistent shared string
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372
373(P) Perl maintains a reference counted internal table of strings to
374optimize the storage and access of hash keys and other strings. This
375indicates someone tried to decrement the reference count of a string
376that can no longer be found in the table.
377
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378=item Attempt to free temp prematurely
379
380(W) Mortalized values are supposed to be freed by the free_tmps()
381routine. This indicates that something else is freeing the SV before
382the free_tmps() routine gets a chance, which means that the free_tmps()
383routine will be freeing an unreferenced scalar when it does try to free
384it.
385
386=item Attempt to free unreferenced glob pointers
387
388(P) The reference counts got screwed up on symbol aliases.
389
390=item Attempt to free unreferenced scalar
391
392(W) Perl went to decrement the reference count of a scalar to see if it
393would go to 0, and discovered that it had already gone to 0 earlier,
394and should have been freed, and in fact, probably was freed. This
395could indicate that SvREFCNT_dec() was called too many times, or that
396SvREFCNT_inc() was called too few times, or that the SV was mortalized
397when it shouldn't have been, or that memory has been corrupted.
398
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399=item Attempt to join self
400
401(F) You tried to join a thread from within itself, which is an
402impossible task. You may be joining the wrong thread, or you may
403need to move the join() to some other thread.
404
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405=item Attempt to pack pointer to temporary value
406
407(W) You tried to pass a temporary value (like the result of a
408function, or a computed expression) to the "p" pack() template. This
409means the result contains a pointer to a location that could become
410invalid anytime, even before the end of the current statement. Use
411literals or global values as arguments to the "p" pack() template to
412avoid this warning.
413
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414=item Attempt to use reference as lvalue in substr
415
416(W) You supplied a reference as the first argument to substr() used
8b1a09fc 417as an lvalue, which is pretty strange. Perhaps you forgot to
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418dereference it first. See L<perlfunc/substr>.
419
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420=item Bad arg length for %s, is %d, should be %d
421
422(F) You passed a buffer of the wrong size to one of msgctl(), semctl() or
2ba9eb46 423shmctl(). In C parlance, the correct sizes are, respectively,
5f05dabc 424S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and
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425S<sizeof(struct shmid_ds *)>.
426
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427=item Bad filehandle: %s
428
429(F) A symbol was passed to something wanting a filehandle, but the symbol
430has no filehandle associated with it. Perhaps you didn't do an open(), or
431did it in another package.
432
433=item Bad free() ignored
434
435(S) An internal routine called free() on something that had never been
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436malloc()ed in the first place. Mandatory, but can be disabled by
437setting environment variable C<PERL_BADFREE> to 1.
438
439This message can be quite often seen with DB_File on systems with
440"hard" dynamic linking, like C<AIX> and C<OS/2>. It is a bug of
441C<Berkeley DB> which is left unnoticed if C<DB> uses I<forgiving>
442system malloc().
a0d0e21e 443
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444=item Bad hash
445
446(P) One of the internal hash routines was passed a null HV pointer.
447
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448=item Bad index while coercing array into hash
449
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450(F) The index looked up in the hash found as the 0'th element of a
451pseudo-hash is not legal. Index values must be at 1 or greater.
452See L<perlref>.
57079c46 453
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454=item Bad name after %s::
455
456(F) You started to name a symbol by using a package prefix, and then didn't
457finish the symbol. In particular, you can't interpolate outside of quotes,
458so
459
460 $var = 'myvar';
461 $sym = mypack::$var;
462
463is not the same as
464
465 $var = 'myvar';
466 $sym = "mypack::$var";
467
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468=item Bad realloc() ignored
469
470(S) An internal routine called realloc() on something that had never been
471malloc()ed in the first place. Mandatory, but can be disabled by
472setting environment variable C<PERL_BADFREE> to 1.
473
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474=item Bad symbol for array
475
476(P) An internal request asked to add an array entry to something that
477wasn't a symbol table entry.
478
479=item Bad symbol for filehandle
480
481(P) An internal request asked to add a filehandle entry to something that
482wasn't a symbol table entry.
483
484=item Bad symbol for hash
485
486(P) An internal request asked to add a hash entry to something that
487wasn't a symbol table entry.
488
8b1a09fc 489=item Badly placed ()'s
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490
491(A) You've accidentally run your script through B<csh> instead
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492of Perl. Check the #! line, or manually feed your script into
493Perl yourself.
cb1a09d0 494
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495=item Bareword "%s" not allowed while "strict subs" in use
496
497(F) With "strict subs" in use, a bareword is only allowed as a
d98d5fff 498subroutine identifier, in curly brackets or to the left of the "=>" symbol.
54310121 499Perhaps you need to predeclare a subroutine?
3fe9a6f1 500
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501=item Bareword "%s" refers to nonexistent package
502
503(W) You used a qualified bareword of the form C<Foo::>, but
504the compiler saw no other uses of that namespace before that point.
505Perhaps you need to predeclare a package?
506
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507=item BEGIN failed--compilation aborted
508
509(F) An untrapped exception was raised while executing a BEGIN subroutine.
510Compilation stops immediately and the interpreter is exited.
511
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512=item BEGIN not safe after errors--compilation aborted
513
514(F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which
515implies a C<BEGIN {}>) after one or more compilation errors had
516already occurred. Since the intended environment for the C<BEGIN {}>
517could not be guaranteed (due to the errors), and since subsequent code
518likely depends on its correct operation, Perl just gave up.
519
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520=item Binary number > 0b11111111111111111111111111111111 non-portable
521
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522(W) The binary number you specified is larger than 2**32-1
523(4294967295) and therefore non-portable between systems. See
524L<perlport> for more on portability concerns.
252aa082 525
9a7dcd9c 526=item bind() on closed socket
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527
528(W) You tried to do a bind on a closed socket. Did you forget to check
529the return value of your socket() call? See L<perlfunc/bind>.
530
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531=item Bit vector size > 32 non-portable
532
533(W) Using bit vector sizes larger than 32 is non-portable.
534
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535=item Bizarre copy of %s in %s
536
537(P) Perl detected an attempt to copy an internal value that is not copiable.
538
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539=item Buffer overflow in prime_env_iter: %s
540
541(W) A warning peculiar to VMS. While Perl was preparing to iterate over
542%ENV, it encountered a logical name or symbol definition which was too long,
543so it was truncated to the string shown.
544
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545=item Callback called exit
546
547(F) A subroutine invoked from an external package via perl_call_sv()
548exited by calling exit.
549
a651a37d 550=item Can't "goto" out of a pseudo block
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551
552(F) A "goto" statement was executed to jump out of what might look
553like a block, except that it isn't a proper block. This usually
554occurs if you tried to jump out of a sort() block or subroutine, which
555is a no-no. See L<perlfunc/goto>.
556
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557=item Can't "goto" into the middle of a foreach loop
558
559(F) A "goto" statement was executed to jump into the middle of a
560foreach loop. You can't get there from here. See L<perlfunc/goto>.
561
a651a37d 562=item Can't "last" outside a loop block
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563
564(F) A "last" statement was executed to break out of the current block,
565except that there's this itty bitty problem called there isn't a
566current block. Note that an "if" or "else" block doesn't count as a
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567"loopish" block, as doesn't a block given to sort(), map() or grep().
568You can usually double the curlies to get the same effect though,
569because the inner curlies will be considered a block that loops once.
570See L<perlfunc/last>.
a0d0e21e 571
a651a37d 572=item Can't "next" outside a loop block
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573
574(F) A "next" statement was executed to reiterate the current block, but
575there isn't a current block. Note that an "if" or "else" block doesn't
a651a37d
GS
576count as a "loopish" block, as doesn't a block given to sort(), map()
577or grep(). You can usually double the curlies to get the same effect
578though, because the inner curlies will be considered a block that
579loops once. See L<perlfunc/next>.
a0d0e21e 580
f675dbe5
CB
581=item Can't read CRTL environ
582
583(S) A warning peculiar to VMS. Perl tried to read an element of %ENV
584from the CRTL's internal environment array and discovered the array was
585missing. You need to figure out where your CRTL misplaced its environ
586or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not searched.
587
a651a37d 588=item Can't "redo" outside a loop block
a0d0e21e
LW
589
590(F) A "redo" statement was executed to restart the current block, but
591there isn't a current block. Note that an "if" or "else" block doesn't
a651a37d
GS
592count as a "loopish" block, as doesn't a block given to sort(), map()
593or grep(). You can usually double the curlies to get the same effect
594though, because the inner curlies will be considered a block that
595loops once. See L<perlfunc/redo>.
a0d0e21e
LW
596
597=item Can't bless non-reference value
598
599(F) Only hard references may be blessed. This is how Perl "enforces"
600encapsulation of objects. See L<perlobj>.
601
602=item Can't break at that line
603
54310121 604(S) A warning intended to only be printed while running within the debugger, indicating
a0d0e21e
LW
605the line number specified wasn't the location of a statement that could
606be stopped at.
607
608=item Can't call method "%s" in empty package "%s"
609
610(F) You called a method correctly, and it correctly indicated a package
611functioning as a class, but that package doesn't have ANYTHING defined
612in it, let alone methods. See L<perlobj>.
613
614=item Can't call method "%s" on unblessed reference
615
54310121 616(F) A method call must know in what package it's supposed to run. It
a0d0e21e
LW
617ordinarily finds this out from the object reference you supply, but
618you didn't supply an object reference in this case. A reference isn't
619an object reference until it has been blessed. See L<perlobj>.
620
621=item Can't call method "%s" without a package or object reference
622
623(F) You used the syntax of a method call, but the slot filled by the
624object reference or package name contains an expression that returns
72b5445b
GS
625a defined value which is neither an object reference nor a package name.
626Something like this will reproduce the error:
627
628 $BADREF = 42;
629 process $BADREF 1,2,3;
630 $BADREF->process(1,2,3);
631
632=item Can't call method "%s" on an undefined value
633
634(F) You used the syntax of a method call, but the slot filled by the
635object reference or package name contains an undefined value.
a0d0e21e
LW
636Something like this will reproduce the error:
637
638 $BADREF = undef;
639 process $BADREF 1,2,3;
640 $BADREF->process(1,2,3);
641
642=item Can't chdir to %s
643
644(F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory
645that you can chdir to, possibly because it doesn't exist.
646
0545a864 647=item Can't check filesystem of script "%s" for nosuid
104d25b7 648
e688b231 649(P) For some reason you can't check the filesystem of the script for nosuid.
104d25b7 650
a0d0e21e
LW
651=item Can't coerce %s to integer in %s
652
653(F) Certain types of SVs, in particular real symbol table entries
55497cff 654(typeglobs), can't be forced to stop being what they are. So you can't
a0d0e21e
LW
655say things like:
656
657 *foo += 1;
658
659You CAN say
660
661 $foo = *foo;
662 $foo += 1;
663
664but then $foo no longer contains a glob.
665
666=item Can't coerce %s to number in %s
667
668(F) Certain types of SVs, in particular real symbol table entries
55497cff 669(typeglobs), can't be forced to stop being what they are.
a0d0e21e
LW
670
671=item Can't coerce %s to string in %s
672
673(F) Certain types of SVs, in particular real symbol table entries
55497cff 674(typeglobs), can't be forced to stop being what they are.
a0d0e21e 675
57079c46
GA
676=item Can't coerce array into hash
677
678(F) You used an array where a hash was expected, but the array has no
679information on how to map from keys to array indices. You can do that
680only with arrays that have a hash reference at index 0.
681
a0d0e21e
LW
682=item Can't create pipe mailbox
683
748a9306
LW
684(P) An error peculiar to VMS. The process is suffering from exhausted quotas
685or other plumbing problems.
a0d0e21e
LW
686
687=item Can't declare %s in my
688
5f05dabc 689(F) Only scalar, array, and hash variables may be declared as lexical variables.
a0d0e21e
LW
690They must have ordinary identifiers as names.
691
692=item Can't do inplace edit on %s: %s
693
694(S) The creation of the new file failed for the indicated reason.
695
54310121 696=item Can't do inplace edit without backup
a0d0e21e 697
54310121 698(F) You're on a system such as MS-DOS that gets confused if you try reading
3fe9a6f1 699from a deleted (but still opened) file. You have to say C<-i.bak>, or some
a0d0e21e
LW
700such.
701
10f9c03d 702=item Can't do inplace edit: %s would not be unique
a0d0e21e 703
10f9c03d
CK
704(S) Your filesystem does not support filenames longer than 14
705characters and Perl was unable to create a unique filename during
706inplace editing with the B<-i> switch. The file was ignored.
a0d0e21e
LW
707
708=item Can't do inplace edit: %s is not a regular file
709
710(S) You tried to use the B<-i> switch on a special file, such as a file in
711/dev, or a FIFO. The file was ignored.
712
713=item Can't do setegid!
714
715(P) The setegid() call failed for some reason in the setuid emulator
716of suidperl.
717
718=item Can't do seteuid!
719
720(P) The setuid emulator of suidperl failed for some reason.
721
722=item Can't do setuid
723
724(F) This typically means that ordinary perl tried to exec suidperl to
725do setuid emulation, but couldn't exec it. It looks for a name of the
726form sperl5.000 in the same directory that the perl executable resides
727under the name perl5.000, typically /usr/local/bin on Unix machines.
728If the file is there, check the execute permissions. If it isn't, ask
729your sysadmin why he and/or she removed it.
730
731=item Can't do waitpid with flags
732
733(F) This machine doesn't have either waitpid() or wait4(), so only waitpid()
734without flags is emulated.
735
8b1a09fc 736=item Can't do {n,m} with n E<gt> m
a0d0e21e
LW
737
738(F) Minima must be less than or equal to maxima. If you really want
739your regexp to match something 0 times, just put {0}. See L<perlre>.
740
741=item Can't emulate -%s on #! line
742
743(F) The #! line specifies a switch that doesn't make sense at this point.
744For example, it'd be kind of silly to put a B<-x> on the #! line.
745
746=item Can't exec "%s": %s
747
5f05dabc 748(W) An system(), exec(), or piped open call could not execute the named
a0d0e21e
LW
749program for the indicated reason. Typical reasons include: the permissions
750were wrong on the file, the file wasn't found in C<$ENV{PATH}>, the
751executable in question was compiled for another architecture, or the
752#! line in a script points to an interpreter that can't be run for
753similar reasons. (Or maybe your system doesn't support #! at all.)
754
755=item Can't exec %s
756
757(F) Perl was trying to execute the indicated program for you because that's
758what the #! line said. If that's not what you wanted, you may need to
759mention "perl" on the #! line somewhere.
760
761=item Can't execute %s
762
2a92aaa0
GS
763(F) You used the B<-S> switch, but the copies of the script to execute found
764in the PATH did not have correct permissions.
765
766=item Can't find %s on PATH, '.' not in PATH
767
768(F) You used the B<-S> switch, but the script to execute could not be found
769in the PATH, or at least not with the correct permissions. The script
770exists in the current directory, but PATH prohibits running it.
771
772=item Can't find %s on PATH
773
a0d0e21e 774(F) You used the B<-S> switch, but the script to execute could not be found
2a92aaa0 775in the PATH.
a0d0e21e
LW
776
777=item Can't find label %s
778
779(F) You said to goto a label that isn't mentioned anywhere that it's possible
780for us to go to. See L<perlfunc/goto>.
781
782=item Can't find string terminator %s anywhere before EOF
783
784(F) Perl strings can stretch over multiple lines. This message means that
5f05dabc 785the closing delimiter was omitted. Because bracketed quotes count nesting
a0d0e21e
LW
786levels, the following is missing its final parenthesis:
787
fb73857a
PP
788 print q(The character '(' starts a side comment.);
789
790If you're getting this error from a here-document, you may have
791included unseen whitespace before or after your closing tag. A good
792programmer's editor will have a way to help you find these characters.
a0d0e21e
LW
793
794=item Can't fork
795
796(F) A fatal error occurred while trying to fork while opening a pipeline.
797
748a9306
LW
798=item Can't get filespec - stale stat buffer?
799
800(S) A warning peculiar to VMS. This arises because of the difference between
801access checks under VMS and under the Unix model Perl assumes. Under VMS,
802access checks are done by filename, rather than by bits in the stat buffer, so
803that ACLs and other protections can be taken into account. Unfortunately, Perl
804assumes that the stat buffer contains all the necessary information, and passes
805it, instead of the filespec, to the access checking routine. It will try to
806retrieve the filespec using the device name and FID present in the stat buffer,
807but this works only if you haven't made a subsequent call to the CRTL stat()
5f05dabc 808routine, because the device name is overwritten with each call. If this warning
748a9306
LW
809appears, the name lookup failed, and the access checking routine gave up and
810returned FALSE, just to be conservative. (Note: The access checking routine
811knows about the Perl C<stat> operator and file tests, so you shouldn't ever
812see this warning in response to a Perl command; it arises only if some internal
813code takes stat buffers lightly.)
814
a0d0e21e
LW
815=item Can't get pipe mailbox device name
816
748a9306
LW
817(P) An error peculiar to VMS. After creating a mailbox to act as a pipe, Perl
818can't retrieve its name for later use.
a0d0e21e
LW
819
820=item Can't get SYSGEN parameter value for MAXBUF
821
748a9306
LW
822(P) An error peculiar to VMS. Perl asked $GETSYI how big you want your
823mailbox buffers to be, and didn't get an answer.
a0d0e21e
LW
824
825=item Can't goto subroutine outside a subroutine
826
827(F) The deeply magical "goto subroutine" call can only replace one subroutine
828call for another. It can't manufacture one out of whole cloth. In general
5f05dabc 829you should be calling it out of only an AUTOLOAD routine anyway. See
a0d0e21e
LW
830L<perlfunc/goto>.
831
b150fb22
RH
832=item Can't goto subroutine from an eval-string
833
834(F) The "goto subroutine" call can't be used to jump out of an eval "string".
835(You can use it to jump out of an eval {BLOCK}, but you probably don't want to.)
836
0b5b802d
GS
837=item Can't ignore signal CHLD, forcing to default
838
839(W) Perl has detected that it is being run with the SIGCHLD signal
840(sometimes known as SIGCLD) disabled. Since disabling this signal
841will interfere with proper determination of exit status of child
842processes, Perl has reset the signal to its default value.
843This situation typically indicates that the parent program under
844which Perl may be running (e.g. cron) is being very careless.
845
706a304b 846=item Can't localize through a reference
4633a7c4 847
706a304b
SM
848(F) You said something like C<local $$ref>, which Perl can't currently
849handle, because when it goes to restore the old value of whatever $ref
850pointed to after the scope of the local() is finished, it can't be
851sure that $ref will still be a reference.
4633a7c4 852
748a9306
LW
853=item Can't localize lexical variable %s
854
2ba9eb46 855(F) You used local on a variable name that was previously declared as a
748a9306
LW
856lexical variable using "my". This is not allowed. If you want to
857localize a package variable of the same name, qualify it with the
858package name.
859
0ebe0038
SM
860=item Can't localize pseudo-hash element
861
862(F) You said something like C<local $ar-E<gt>{'key'}>, where $ar is
863a reference to a pseudo-hash. That hasn't been implemented yet, but
864you can get a similar effect by localizing the corresponding array
865element directly -- C<local $ar-E<gt>[$ar-E<gt>[0]{'key'}]>.
866
4727527e
IZ
867=item Can't locate auto/%s.al in @INC
868
869(F) A function (or method) was called in a package which allows autoload,
870but there is no function to autoload. Most probable causes are a misprint
871in a function/method name or a failure to C<AutoSplit> the file, say, by
872doing C<make install>.
873
ec889f3a
GS
874=item Can't locate %s
875
876(F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be
877found. Perl looks for the file in all the locations mentioned in @INC,
878unless the file name included the full path to the file. Perhaps you need
879to set the PERL5LIB or PERL5OPT environment variable to say where the extra
880library is, or maybe the script needs to add the library name to @INC. Or
881maybe you just misspelled the name of the file. See L<perlfunc/require>
882and L<lib>.
a0d0e21e
LW
883
884=item Can't locate object method "%s" via package "%s"
885
886(F) You called a method correctly, and it correctly indicated a package
887functioning as a class, but that package doesn't define that particular
2ba9eb46 888method, nor does any of its base classes. See L<perlobj>.
a0d0e21e
LW
889
890=item Can't locate package %s for @%s::ISA
891
892(W) The @ISA array contained the name of another package that doesn't seem
893to exist.
894
3e3baf6d
TB
895=item Can't make list assignment to \%ENV on this system
896
897(F) List assignment to %ENV is not supported on some systems, notably VMS.
898
a0d0e21e
LW
899=item Can't modify %s in %s
900
901(F) You aren't allowed to assign to the item indicated, or otherwise try to
5f05dabc 902change it, such as with an auto-increment.
a0d0e21e 903
cd06dffe
GS
904=item Can't modify non-lvalue subroutine call
905
437784d6
GS
906(F) Subroutines meant to be used in lvalue context should be declared as
907such, see L<perlsub/"Lvalue subroutines">.
cd06dffe 908
54310121 909=item Can't modify nonexistent substring
a0d0e21e
LW
910
911(P) The internal routine that does assignment to a substr() was handed
912a NULL.
913
5f05dabc 914=item Can't msgrcv to read-only var
a0d0e21e 915
5f05dabc 916(F) The target of a msgrcv must be modifiable to be used as a receive
a0d0e21e
LW
917buffer.
918
919=item Can't open %s: %s
920
08e9d68e
DD
921(S) The implicit opening of a file through use of the C<E<lt>E<gt>>
922filehandle, either implicitly under the C<-n> or C<-p> command-line
923switches, or explicitly, failed for the indicated reason. Usually this
924is because you don't have read permission for a file which you named
925on the command line.
a0d0e21e
LW
926
927=item Can't open bidirectional pipe
928
929(W) You tried to say C<open(CMD, "|cmd|")>, which is not supported. You can
930try any of several modules in the Perl library to do this, such as
7e1af8bc 931IPC::Open2. Alternately, direct the pipe's output to a file using "E<gt>",
a0d0e21e
LW
932and then read it in under a different file handle.
933
748a9306
LW
934=item Can't open error file %s as stderr
935
936(F) An error peculiar to VMS. Perl does its own command line redirection, and
8b1a09fc
PP
937couldn't open the file specified after '2E<gt>' or '2E<gt>E<gt>' on the
938command line for writing.
748a9306
LW
939
940=item Can't open input file %s as stdin
941
942(F) An error peculiar to VMS. Perl does its own command line redirection, and
8b1a09fc 943couldn't open the file specified after 'E<lt>' on the command line for reading.
748a9306
LW
944
945=item Can't open output file %s as stdout
946
947(F) An error peculiar to VMS. Perl does its own command line redirection, and
8b1a09fc
PP
948couldn't open the file specified after 'E<gt>' or 'E<gt>E<gt>' on the command
949line for writing.
748a9306
LW
950
951=item Can't open output pipe (name: %s)
952
953(P) An error peculiar to VMS. Perl does its own command line redirection, and
954couldn't open the pipe into which to send data destined for stdout.
955
a0d0e21e
LW
956=item Can't open perl script "%s": %s
957
958(F) The script you specified can't be opened for the indicated reason.
959
7bac28a0
PP
960=item Can't redefine active sort subroutine %s
961
962(F) Perl optimizes the internal handling of sort subroutines and keeps
963pointers into them. You tried to redefine one such sort subroutine when it
964was currently active, which is not allowed. If you really want to do
965this, you should write C<sort { &func } @x> instead of C<sort func @x>.
966
10f9c03d
CK
967=item Can't remove %s: %s, skipping file
968
969(S) You requested an inplace edit without creating a backup file. Perl
970was unable to remove the original file to replace it with the modified
971file. The file was left unmodified.
972
a0d0e21e
LW
973=item Can't rename %s to %s: %s, skipping file
974
10f9c03d
CK
975(S) The rename done by the B<-i> switch failed for some reason,
976probably because you don't have write permission to the directory.
a0d0e21e 977
748a9306
LW
978=item Can't reopen input pipe (name: %s) in binary mode
979
980(P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried to
981reopen it to accept binary data. Alas, it failed.
982
a0d0e21e
LW
983=item Can't reswap uid and euid
984
985(P) The setreuid() call failed for some reason in the setuid emulator
986of suidperl.
987
988=item Can't return outside a subroutine
989
990(F) The return statement was executed in mainline code, that is, where
991there was no subroutine call to return out of. See L<perlsub>.
992
cd06dffe
GS
993=item Can't return %s from lvalue subroutine
994
995(F) Perl detected an attempt to return illegal lvalues (such
996as temporary or readonly values) from a subroutine used as an lvalue.
997This is not allowed.
998
a0d0e21e
LW
999=item Can't stat script "%s"
1000
1001(P) For some reason you can't fstat() the script even though you have
1002it open already. Bizarre.
1003
1004=item Can't swap uid and euid
1005
1006(P) The setreuid() call failed for some reason in the setuid emulator
1007of suidperl.
1008
1009=item Can't take log of %g
1010
fb73857a
PP
1011(F) For ordinary real numbers, you can't take the logarithm of a
1012negative number or zero. There's a Math::Complex package that comes
1013standard with Perl, though, if you really want to do that for
1014the negative numbers.
a0d0e21e
LW
1015
1016=item Can't take sqrt of %g
1017
1018(F) For ordinary real numbers, you can't take the square root of a
fb73857a
PP
1019negative number. There's a Math::Complex package that comes standard
1020with Perl, though, if you really want to do that.
a0d0e21e
LW
1021
1022=item Can't undef active subroutine
1023
1024(F) You can't undefine a routine that's currently running. You can,
1025however, redefine it while it's running, and you can even undef the
1026redefined subroutine while the old routine is running. Go figure.
1027
1028=item Can't unshift
1029
1030(F) You tried to unshift an "unreal" array that can't be unshifted, such
1031as the main Perl stack.
1032
1033=item Can't upgrade that kind of scalar
1034
1035(P) The internal sv_upgrade routine adds "members" to an SV, making
1036it into a more specialized kind of SV. The top several SV types are
1037so specialized, however, that they cannot be interconverted. This
1038message indicates that such a conversion was attempted.
1039
1040=item Can't upgrade to undef
1041
1042(P) The undefined SV is the bottom of the totem pole, in the scheme
1043of upgradability. Upgrading to undef indicates an error in the
1044code calling sv_upgrade.
1045
1d2dff63
GS
1046=item Can't use %%! because Errno.pm is not available
1047
1048(F) The first time the %! hash is used, perl automatically loads the
1049Errno.pm module. The Errno module is expected to tie the %! hash to
1050provide symbolic names for C<$!> errno values.
1051
c07a80fd
PP
1052=item Can't use "my %s" in sort comparison
1053
1054(F) The global variables $a and $b are reserved for sort comparisons.
8b1a09fc 1055You mentioned $a or $b in the same line as the E<lt>=E<gt> or cmp operator,
c07a80fd
PP
1056and the variable had earlier been declared as a lexical variable.
1057Either qualify the sort variable with the package name, or rename the
1058lexical variable.
1059
e9fa98b2
HS
1060=item Bad evalled substitution pattern
1061
1062(F) You've used the /e switch to evaluate the replacement for a
1063substitution, but perl found a syntax error in the code to evaluate,
1064most likely an unexpected right brace '}'.
1065
a0d0e21e
LW
1066=item Can't use %s for loop variable
1067
1068(F) Only a simple scalar variable may be used as a loop variable on a foreach.
1069
1070=item Can't use %s ref as %s ref
1071
1072(F) You've mixed up your reference types. You have to dereference a
1073reference of the type needed. You can use the ref() function to
1074test the type of the reference, if need be.
1075
9a7dcd9c 1076=item Can't use \%c to mean $%c in expression
748a9306
LW
1077
1078(W) In an ordinary expression, backslash is a unary operator that creates
1079a reference to its argument. The use of backslash to indicate a backreference
5f05dabc 1080to a matched substring is valid only as part of a regular expression pattern.
748a9306
LW
1081Trying to do this in ordinary Perl code produces a value that prints
1082out looking like SCALAR(0xdecaf). Use the $1 form instead.
1083
9a7dcd9c 1084=item Can't use bareword ("%s") as %s ref while "strict refs" in use
44a8e56a
PP
1085
1086(F) Only hard references are allowed by "strict refs". Symbolic references
1087are disallowed. See L<perlref>.
1088
748a9306 1089=item Can't use string ("%s") as %s ref while "strict refs" in use
a0d0e21e
LW
1090
1091(F) Only hard references are allowed by "strict refs". Symbolic references
1092are disallowed. See L<perlref>.
1093
1094=item Can't use an undefined value as %s reference
1095
1096(F) A value used as either a hard reference or a symbolic reference must
54310121 1097be a defined value. This helps to delurk some insidious errors.
a0d0e21e 1098
a0d0e21e
LW
1099=item Can't use global %s in "my"
1100
1101(F) You tried to declare a magical variable as a lexical variable. This is
5f05dabc 1102not allowed, because the magic can be tied to only one location (namely
a0d0e21e
LW
1103the global variable) and it would be incredibly confusing to have
1104variables in your program that looked like magical variables but
1105weren't.
1106
748a9306
LW
1107=item Can't use subscript on %s
1108
1109(F) The compiler tried to interpret a bracketed expression as a
1110subscript. But to the left of the brackets was an expression that
1111didn't look like an array reference, or anything else subscriptable.
1112
810b8aa5
GS
1113=item Can't weaken a nonreference
1114
1115(F) You attempted to weaken something that was not a reference. Only
1116references can be weakened.
1117
5f05dabc 1118=item Can't x= to read-only value
a0d0e21e
LW
1119
1120(F) You tried to repeat a constant value (often the undefined value) with
1121an assignment operator, which implies modifying the value itself.
1122Perhaps you need to copy the value to a temporary, and repeat that.
1123
3f4520fe 1124=item Can't find an opnumber for "%s"
b6c543e3
IZ
1125
1126(F) A string of a form C<CORE::word> was given to prototype(), but
1127there is no builtin with the name C<word>.
1128
3f4520fe 1129=item Can't resolve method `%s' overloading `%s' in package `%s'
e7ea3e70
IZ
1130
1131(F|P) Error resolving overloading specified by a method name (as
1132opposed to a subroutine reference): no such method callable via the
1133package. If method name is C<???>, this is an internal error.
1134
b8c5462f 1135=item Character class [:%s:] unknown
4599a1de 1136
b8c5462f 1137(F) The class in the character class [: :] syntax is unknown.
437784d6 1138See L<perlre>.
4599a1de 1139
b8c5462f
JH
1140=item Character class syntax [%s] belongs inside character classes
1141
1142(W) The character class constructs [: :], [= =], and [. .] go
644a2880 1143I<inside> character classes, the [] are part of the construct,
437784d6
GS
1144for example: /[012[:alpha:]345]/. Note that [= =] and [. .]
1145are not currently implemented; they are simply placeholders for
1146future extensions.
b8c5462f 1147
644a2880 1148=item Character class syntax [. .] is reserved for future extensions
4599a1de
JH
1149
1150(W) Within regular expression character classes ([]) the syntax beginning
b8c5462f 1151with "[." and ending with ".]" is reserved for future extensions.
4599a1de
JH
1152If you need to represent those character sequences inside a regular
1153expression character class, just quote the square brackets with the
b8c5462f 1154backslash: "\[." and ".\]".
4599a1de
JH
1155
1156=item Character class syntax [= =] is reserved for future extensions
1157
1158(W) Within regular expression character classes ([]) the syntax
1159beginning with "[=" and ending with "=]" is reserved for future extensions.
1160If you need to represent those character sequences inside a regular
1161expression character class, just quote the square brackets with the
1162backslash: "\[=" and "=\]".
1163
a0d0e21e
LW
1164=item chmod: mode argument is missing initial 0
1165
1166(W) A novice will sometimes say
1167
1168 chmod 777, $filename
1169
1170not realizing that 777 will be interpreted as a decimal number, equivalent
1171to 01411. Octal constants are introduced with a leading 0 in Perl, as in C.
1172
8b1a09fc 1173=item Close on unopened file E<lt>%sE<gt>
a0d0e21e
LW
1174
1175(W) You tried to close a filehandle that was never opened.
1176
7a2e2cd6
PP
1177=item Compilation failed in require
1178
1179(F) Perl could not compile a file specified in a C<require> statement.
1180Perl uses this generic message when none of the errors that it encountered
1181were severe enough to halt compilation immediately.
1182
c3464db5
DD
1183=item Complex regular subexpression recursion limit (%d) exceeded
1184
1185(W) The regular expression engine uses recursion in complex situations
1186where back-tracking is required. Recursion depth is limited to 32766,
1187or perhaps less in architectures where the stack cannot grow
1188arbitrarily. ("Simple" and "medium" situations are handled without
1189recursion and are not subject to a limit.) Try shortening the string
1190under examination; looping in Perl code (e.g. with C<while>) rather
1191than in the regular expression engine; or rewriting the regular
1192expression so that it is simpler or backtracks less. (See L<perlbook>
1193for information on I<Mastering Regular Expressions>.)
1194
9a7dcd9c 1195=item connect() on closed socket
a0d0e21e
LW
1196
1197(W) You tried to do a connect on a closed socket. Did you forget to check
1198the return value of your socket() call? See L<perlfunc/connect>.
1199
779c5bc9
GS
1200=item Constant is not %s reference
1201
1202(F) A constant value (perhaps declared using the C<use constant> pragma)
1203is being dereferenced, but it amounts to the wrong type of reference. The
1204message indicates the type of reference that was expected. This usually
1205indicates a syntax error in dereferencing the constant value.
1206See L<perlsub/"Constant Functions"> and L<constant>.
1207
4cee8e80
CS
1208=item Constant subroutine %s redefined
1209
1210(S) You redefined a subroutine which had previously been eligible for
1211inlining. See L<perlsub/"Constant Functions"> for commentary and
1212workarounds.
1213
9607fc9c
PP
1214=item Constant subroutine %s undefined
1215
1216(S) You undefined a subroutine which had previously been eligible for
1217inlining. See L<perlsub/"Constant Functions"> for commentary and
1218workarounds.
1219
423cee85
JH
1220=item constant(%s): %%^H is not localized
1221
1222(F) When setting compile-time-lexicalized hash %^H one should set the
1223corresponding bit of $^H as well.
1224
1225=item constant(%s): %s
1226
1227(F) Compile-time-substitutions (such as overloaded constants and
1228character names) were not correctly set up.
1229
e7ea3e70
IZ
1230=item Copy method did not return a reference
1231
1232(F) The method which overloads "=" is buggy. See L<overload/Copy Constructor>.
1233
a0d0e21e
LW
1234=item Corrupt malloc ptr 0x%lx at 0x%lx
1235
1236(P) The malloc package that comes with Perl had an internal failure.
1237
1238=item corrupted regexp pointers
1239
1240(P) The regular expression engine got confused by what the regular
1241expression compiler gave it.
1242
1243=item corrupted regexp program
1244
1245(P) The regular expression engine got passed a regexp program without
1246a valid magic number.
1247
1248=item Deep recursion on subroutine "%s"
1249
1250(W) This subroutine has called itself (directly or indirectly) 100
3e3baf6d 1251times more than it has returned. This probably indicates an infinite
a0d0e21e
LW
1252recursion, unless you're writing strange benchmark programs, in which
1253case it indicates something else.
1254
f10b0346 1255=item defined(@array) is deprecated
69794302
MJD
1256
1257(D) defined() is not usually useful on arrays because it checks for an
1258undefined I<scalar> value. If you want to see if the array is empty,
1259just use C<if (@array) { # not empty }> for example.
1260
f10b0346 1261=item defined(%hash) is deprecated
69794302
MJD
1262
1263(D) defined() is not usually useful on hashes because it checks for an
1264undefined I<scalar> value. If you want to see if the hash is empty,
1265just use C<if (%hash) { # not empty }> for example.
1266
fc36a67e
PP
1267=item Delimiter for here document is too long
1268
1269(F) In a here document construct like C<E<lt>E<lt>FOO>, the label
1270C<FOO> is too long for Perl to handle. You have to be seriously
1271twisted to write code that triggers this error.
1272
3cdd684c
TP
1273=item Did not produce a valid header
1274
1275See Server error.
1276
4633a7c4
LW
1277=item Did you mean &%s instead?
1278
1279(W) You probably referred to an imported subroutine &FOO as $FOO or some such.
1280
748a9306 1281=item Did you mean $ or @ instead of %?
a0d0e21e 1282
748a9306
LW
1283(W) You probably said %hash{$key} when you meant $hash{$key} or @hash{@keys}.
1284On the other hand, maybe you just meant %hash and got carried away.
1285
7e1af8bc 1286=item Died
5f05dabc
PP
1287
1288(F) You passed die() an empty string (the equivalent of C<die "">) or
1289you called it with no args and both C<$@> and C<$_> were empty.
1290
54310121 1291=item Do you need to predeclare %s?
748a9306
LW
1292
1293(S) This is an educated guess made in conjunction with the message "%s
1294found where operator expected". It often means a subroutine or module
1295name is being referenced that hasn't been declared yet. This may be
1296because of ordering problems in your file, or because of a missing
1297"sub", "package", "require", or "use" statement. If you're
1298referencing something that isn't defined yet, you don't actually have
1299to define the subroutine or package before the current location. You
1300can use an empty "sub foo;" or "package FOO;" to enter a "forward"
1301declaration.
a0d0e21e 1302
3cdd684c
TP
1303=item Document contains no data
1304
1305See Server error.
1306
a0d0e21e
LW
1307=item Don't know how to handle magic of type '%s'
1308
1309(P) The internal handling of magical variables has been cursed.
1310
1311=item do_study: out of memory
1312
1313(P) This should have been caught by safemalloc() instead.
1314
1315=item Duplicate free() ignored
1316
1317(S) An internal routine called free() on something that had already
1318been freed.
1319
4633a7c4
LW
1320=item elseif should be elsif
1321
1322(S) There is no keyword "elseif" in Perl because Larry thinks it's
1323ugly. Your code will be interpreted as an attempt to call a method
1324named "elseif" for the class returned by the following block. This is
1325unlikely to be what you want.
1326
4f25aa18 1327=item %s failed--call queue aborted
a0d0e21e 1328
4f25aa18
GS
1329(F) An untrapped exception was raised while executing a STOP, INIT, or
1330END subroutine. Processing of the remainder of the queue of such
1331routines has been prematurely ended.
a0d0e21e 1332
85ab1d1d 1333=item entering effective %s failed
5ff3f7a4 1334
85ab1d1d 1335(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1336effective uids or gids failed.
1337
748a9306
LW
1338=item Error converting file specification %s
1339
5f05dabc 1340(F) An error peculiar to VMS. Because Perl may have to deal with file
748a9306
LW
1341specifications in either VMS or Unix syntax, it converts them to a
1342single form when it must operate on them directly. Either you've
1343passed an invalid file specification to Perl, or you've found a
1344case the conversion routines don't handle. Drat.
1345
e4d48cc9
GS
1346=item %s: Eval-group in insecure regular expression
1347
1348(F) Perl detected tainted data when trying to compile a regular expression
1349that contains the C<(?{ ... })> zero-width assertion, which is unsafe.
1350See L<perlre/(?{ code })>, and L<perlsec>.
1351
1352=item %s: Eval-group not allowed, use re 'eval'
1353
1354(F) A regular expression contained the C<(?{ ... })> zero-width assertion,
1355but that construct is only allowed when the C<use re 'eval'> pragma is
1356in effect. See L<perlre/(?{ code })>.
1357
1358=item %s: Eval-group not allowed at run time
1359
1360(F) Perl tried to compile a regular expression containing the C<(?{ ... })>
3c247ff3
GS
1361zero-width assertion at run time, as it would when the pattern contains
1362interpolated values. Since that is a security risk, it is not allowed.
e4d48cc9
GS
1363If you insist, you may still do this by explicitly building the pattern
1364from an interpolated string at run time and using that in an eval().
1365See L<perlre/(?{ code })>.
1366
fc36a67e
PP
1367=item Excessively long <> operator
1368
1369(F) The contents of a <> operator may not exceed the maximum size of a
1370Perl identifier. If you're just trying to glob a long list of
1371filenames, try using the glob() operator, or put the filenames into a
1372variable and glob that.
1373
f86702cc 1374=item Execution of %s aborted due to compilation errors
a0d0e21e
LW
1375
1376(F) The final summary message when a Perl compilation fails.
1377
1378=item Exiting eval via %s
1379
8b1a09fc 1380(W) You are exiting an eval by unconventional means, such as
a0d0e21e
LW
1381a goto, or a loop control statement.
1382
0a753a76
PP
1383=item Exiting pseudo-block via %s
1384
1385(W) You are exiting a rather special block construct (like a sort block or
1386subroutine) by unconventional means, such as a goto, or a loop control
1387statement. See L<perlfunc/sort>.
1388
a0d0e21e
LW
1389=item Exiting subroutine via %s
1390
8b1a09fc 1391(W) You are exiting a subroutine by unconventional means, such as
a0d0e21e
LW
1392a goto, or a loop control statement.
1393
1394=item Exiting substitution via %s
1395
8b1a09fc 1396(W) You are exiting a substitution by unconventional means, such as
a0d0e21e
LW
1397a return, a goto, or a loop control statement.
1398
7b8d334a
GS
1399=item Explicit blessing to '' (assuming package main)
1400
1401(W) You are blessing a reference to a zero length string. This has
1402the effect of blessing the reference into the package main. This is
1403usually not what you want. Consider providing a default target
ae6c4aac 1404package, e.g. bless($ref, $p || 'MyPackage');
7b8d334a 1405
73b437c8
JH
1406=item false [] range "%s" in regexp
1407
1408(W) A character class range must start and end at a literal character, not
1409another character class like C<\d> or C<[:alpha:]>. The "-" in your false
1410range is interpreted as a literal "-". Consider quoting the "-", "\-".
1411See L<perlre>.
1412
748a9306 1413=item Fatal VMS error at %s, line %d
a0d0e21e 1414
748a9306
LW
1415(P) An error peculiar to VMS. Something untoward happened in a VMS system
1416service or RTL routine; Perl's exit status should provide more details. The
1417filename in "at %s" and the line number in "line %d" tell you which section of
1418the Perl source code is distressed.
a0d0e21e
LW
1419
1420=item fcntl is not implemented
1421
1422(F) Your machine apparently doesn't implement fcntl(). What is this, a
1423PDP-11 or something?
1424
1425=item Filehandle %s never opened
1426
1427(W) An I/O operation was attempted on a filehandle that was never initialized.
1428You need to do an open() or a socket() call, or call a constructor from
1429the FileHandle package.
1430
af8c498a 1431=item Filehandle %s opened only for input
a0d0e21e
LW
1432
1433(W) You tried to write on a read-only filehandle. If you
1434intended it to be a read-write filehandle, you needed to open it with
8b1a09fc 1435"+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If
5f05dabc 1436you intended only to write the file, use "E<gt>" or "E<gt>E<gt>". See
8b1a09fc 1437L<perlfunc/open>.
a0d0e21e 1438
af8c498a 1439=item Filehandle %s opened only for output
a0d0e21e 1440
af8c498a 1441(W) You tried to read from a filehandle opened only for writing. If you
437784d6 1442intended it to be a read/write filehandle, you needed to open it with
8b1a09fc 1443"+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If
af8c498a 1444you intended only to read from the file, use "E<lt>". See
8b1a09fc 1445L<perlfunc/open>.
a0d0e21e
LW
1446
1447=item Final $ should be \$ or $name
1448
1449(F) You must now decide whether the final $ in a string was meant to be
1450a literal dollar sign, or was meant to introduce a variable name
1451that happens to be missing. So you have to put either the backslash or
1452the name.
1453
1454=item Final @ should be \@ or @name
1455
1456(F) You must now decide whether the final @ in a string was meant to be
1457a literal "at" sign, or was meant to introduce a variable name
1458that happens to be missing. So you have to put either the backslash or
1459the name.
1460
1461=item Format %s redefined
1462
1463(W) You redefined a format. To suppress this warning, say
1464
1465 {
4438c4b7 1466 no warnings;
a0d0e21e
LW
1467 eval "format NAME =...";
1468 }
1469
1470=item Format not terminated
1471
1472(F) A format must be terminated by a line with a solitary dot. Perl got
1473to the end of your file without finding such a line.
1474
1475=item Found = in conditional, should be ==
1476
1477(W) You said
1478
1479 if ($foo = 123)
1480
1481when you meant
1482
1483 if ($foo == 123)
1484
1485(or something like that).
1486
1487=item gdbm store returned %d, errno %d, key "%s"
1488
1489(S) A warning from the GDBM_File extension that a store failed.
1490
1491=item gethostent not implemented
1492
1493(F) Your C library apparently doesn't implement gethostent(), probably
1494because if it did, it'd feel morally obligated to return every hostname
1495on the Internet.
1496
9a7dcd9c 1497=item get%sname() on closed socket
a0d0e21e
LW
1498
1499(W) You tried to get a socket or peer socket name on a closed socket.
1500Did you forget to check the return value of your socket() call?
1501
748a9306
LW
1502=item getpwnam returned invalid UIC %#o for user "%s"
1503
1504(S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the
1505C<getpwnam> operator returned an invalid UIC.
1506
a0d0e21e
LW
1507=item Glob not terminated
1508
1509(F) The lexer saw a left angle bracket in a place where it was expecting
1510a term, so it's looking for the corresponding right angle bracket, and not
1511finding it. Chances are you left some needed parentheses out earlier in
1512the line, and you really meant a "less than".
1513
1514=item Global symbol "%s" requires explicit package name
1515
68dc0745
PP
1516(F) You've said "use strict vars", which indicates that all variables
1517must either be lexically scoped (using "my"), or explicitly qualified to
a0d0e21e
LW
1518say which package the global variable is in (using "::").
1519
1520=item goto must have label
1521
1522(F) Unlike with "next" or "last", you're not allowed to goto an
1523unspecified destination. See L<perlfunc/goto>.
1524
1525=item Had to create %s unexpectedly
1526
1527(S) A routine asked for a symbol from a symbol table that ought to have
1528existed already, but for some reason it didn't, and had to be created on
1529an emergency basis to prevent a core dump.
1530
1531=item Hash %%s missing the % in argument %d of %s()
1532
1533(D) Really old Perl let you omit the % on hash names in some spots. This
1534is now heavily deprecated.
1535
252aa082
JH
1536=item Hexadecimal number > 0xffffffff non-portable
1537
9e24b6e2
JH
1538(W) The hexadecimal number you specified is larger than 2**32-1
1539(4294967295) and therefore non-portable between systems. See
1540L<perlport> for more on portability concerns.
252aa082 1541
8903cb82
PP
1542=item Identifier too long
1543
1544(F) Perl limits identifiers (names for variables, functions, etc.) to
fc36a67e
PP
1545about 250 characters for simple names, and somewhat more for compound
1546names (like C<$A::B>). You've exceeded Perl's limits. Future
1547versions of Perl are likely to eliminate these arbitrary limitations.
8903cb82 1548
f675dbe5
CB
1549=item Ill-formed CRTL environ value "%s"
1550
1551(W) A warning peculiar to VMS. Perl tried to read the CRTL's internal
1552environ array, and encountered an element without the C<=> delimiter
1553used to spearate keys from values. The element is ignored.
1554
1555=item Ill-formed message in prime_env_iter: |%s|
a0d0e21e 1556
f675dbe5
CB
1557(W) A warning peculiar to VMS. Perl tried to read a logical name
1558or CLI symbol definition when preparing to iterate over %ENV, and
1559didn't see the expected delimiter between key and value, so the
1560line was ignored.
a0d0e21e 1561
4fdae800
PP
1562=item Illegal character %s (carriage return)
1563
1564(F) A carriage return character was found in the input. This is an
1565error, and not a warning, because carriage return characters can break
54310121
PP
1566multi-line strings, including here documents (e.g., C<print E<lt>E<lt>EOF;>).
1567
1568Under Unix, this error is usually caused by executing Perl code --
68dc0745 1569either the main program, a module, or an eval'd string -- that was
54310121 1570transferred over a network connection from a non-Unix system without
68dc0745
PP
1571properly converting the text file format.
1572
1573Under systems that use something other than '\n' to delimit lines of
1574text, this error can also be caused by reading Perl code from a file
1575handle that is in binary mode (as set by the C<binmode> operator).
1576
1577In either case, the Perl code in question will probably need to be
1578converted with something like C<s/\x0D\x0A?/\n/g> before it can be
1579executed.
4fdae800 1580
a0d0e21e
LW
1581=item Illegal division by zero
1582
1583(F) You tried to divide a number by 0. Either something was wrong in your
1584logic, or you need to put a conditional in to guard against meaningless input.
1585
1586=item Illegal modulus zero
1587
1588(F) You tried to divide a number by 0 to get the remainder. Most numbers
1589don't take to this kindly.
1590
399388f4
GS
1591=item Illegal binary digit %s
1592
437784d6 1593(F) You used a digit other than 0 or 1 in a binary number.
399388f4
GS
1594
1595=item Illegal octal digit %s
a0d0e21e
LW
1596
1597(F) You used an 8 or 9 in a octal number.
1598
399388f4
GS
1599=item Illegal binary digit %s ignored
1600
1601(W) You may have tried to use a digit other than 0 or 1 in a binary number.
1602Interpretation of the binary number stopped before the offending digit.
1603
1604=item Illegal octal digit %s ignored
748a9306
LW
1605
1606(W) You may have tried to use an 8 or 9 in a octal number. Interpretation
1607of the octal number stopped before the 8 or 9.
1608
651978e7 1609=item Illegal hexadecimal digit %s ignored
6ff81951 1610
252aa082
JH
1611(W) You may have tried to use a character other than 0 - 9 or A - F, a - f
1612in a hexadecimal number. Interpretation of the hexadecimal number stopped
6ff81951
GS
1613before the illegal character.
1614
81e118e0
JH
1615=item Illegal number of bits in vec
1616
0a1cd687 1617(F) The number of bits in vec() (the third argument) must be a power of
c5a0f51a 1618two from 1 to 32 (or 64, if your platform supports that).
09bef843 1619
54310121
PP
1620=item Illegal switch in PERL5OPT: %s
1621
1622(X) The PERL5OPT environment variable may only be used to set the
1623following switches: B<-[DIMUdmw]>.
1624
9607fc9c
PP
1625=item In string, @%s now must be written as \@%s
1626
1627(F) It used to be that Perl would try to guess whether you wanted an
1628array interpolated or a literal @. It did this when the string was first
1629used at runtime. Now strings are parsed at compile time, and ambiguous
1630instances of @ must be disambiguated, either by prepending a backslash to
1631indicate a literal, or by declaring (or using) the array within the
1632program before the string (lexically). (Someday it will simply assume
1633that an unbackslashed @ interpolates an array.)
1634
a0d0e21e
LW
1635=item Insecure dependency in %s
1636
8b1a09fc 1637(F) You tried to do something that the tainting mechanism didn't like.
a0d0e21e
LW
1638The tainting mechanism is turned on when you're running setuid or setgid,
1639or when you specify B<-T> to turn it on explicitly. The tainting mechanism
1640labels all data that's derived directly or indirectly from the user,
1641who is considered to be unworthy of your trust. If any such data is
1642used in a "dangerous" operation, you get this error. See L<perlsec>
1643for more information.
1644
1645=item Insecure directory in %s
1646
1647(F) You can't use system(), exec(), or a piped open in a setuid or setgid
8b1a09fc 1648script if C<$ENV{PATH}> contains a directory that is writable by the world.
a0d0e21e
LW
1649See L<perlsec>.
1650
62f468fc 1651=item Insecure $ENV{%s} while running %s
a0d0e21e
LW
1652
1653(F) You can't use system(), exec(), or a piped open in a setuid or
62f468fc
G
1654setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>,
1655C<$ENV{ENV}> or C<$ENV{BASH_ENV}> are derived from data supplied (or
a0d0e21e
LW
1656potentially supplied) by the user. The script must set the path to a
1657known value, using trustworthy data. See L<perlsec>.
1658
a7ae9550
GS
1659=item Integer overflow in %s number
1660
9e24b6e2 1661(W) The hexadecimal, octal or binary number you have specified either
c6edd1b7 1662as a literal or as an argument to hex() or oct() is too big for your
9e24b6e2
JH
1663architecture, and has been converted to a floating point number. On a
166432-bit architecture the largest hexadecimal, octal or binary number
1665representable without overflow is 0xFFFFFFFF, 037777777777, or
16660b11111111111111111111111111111111 respectively. Note that Perl
1667transparently promotes all numbers to a floating point representation
1668internally--subject to loss of precision errors in subsequent
1669operations.
bbce6d69 1670
748a9306
LW
1671=item Internal inconsistency in tracking vforks
1672
1673(S) A warning peculiar to VMS. Perl keeps track of the number
5f05dabc 1674of times you've called C<fork> and C<exec>, to determine
2ba9eb46 1675whether the current call to C<exec> should affect the current
b687b08b 1676script or a subprocess (see L<perlvms/"exec LIST">). Somehow, this count
748a9306
LW
1677has become scrambled, so Perl is making a guess and treating
1678this C<exec> as a request to terminate the Perl script
1679and execute the specified command.
1680
a0d0e21e
LW
1681=item internal disaster in regexp
1682
1683(P) Something went badly wrong in the regular expression parser.
1684
4eb79ab5
GS
1685=item glob failed (%s)
1686
1687(W) Something went wrong with the external program(s) used for C<glob>
1688and C<E<lt>*.cE<gt>>. Usually, this means that you supplied a C<glob>
1689pattern that caused the external program to fail and exit with a nonzero
1690status. If the message indicates that the abnormal exit resulted in a
1691coredump, this may also mean that your csh (C shell) is broken. If so,
1692you should change all of the csh-related variables in config.sh: If you
1693have tcsh, make the variables refer to it as if it were csh (e.g.
1694C<full_csh='/usr/bin/tcsh'>); otherwise, make them all empty (except that
1695C<d_csh> should be C<'undef'>) so that Perl will think csh is missing.
1696In either case, after editing config.sh, run C<./Configure -S> and
1697rebuild Perl.
5cd24f17 1698
a0d0e21e
LW
1699=item internal urp in regexp at /%s/
1700
1701(P) Something went badly awry in the regular expression parser.
1702
09bef843
SB
1703=item Invalid %s attribute: %s
1704
1705The indicated attribute for a subroutine or variable was not recognized
1706by Perl or by a user-supplied handler. See L<attributes>.
1707
1708=item Invalid %s attributes: %s
1709
1710The indicated attributes for a subroutine or variable were not recognized
1711by Perl or by a user-supplied handler. See L<attributes>.
1712
73b437c8 1713=item invalid [] range "%s" in regexp
a0d0e21e
LW
1714
1715(F) The range specified in a character class had a minimum character
1209ba90 1716greater than the maximum character. See L<perlre>.
a0d0e21e 1717
c635e13b
PP
1718=item Invalid conversion in %s: "%s"
1719
878e08df 1720(W) Perl does not understand the given format conversion.
c635e13b
PP
1721See L<perlfunc/sprintf>.
1722
09bef843
SB
1723=item Invalid separator character %s in attribute list
1724
1725(F) Something other than a comma or whitespace was seen between the
1726elements of an attribute list. If the previous attribute
1727had a parenthesised parameter list, perhaps that list was terminated
1728too soon. See L<attributes>.
1729
96e4d5b1
PP
1730=item Invalid type in pack: '%s'
1731
8903cb82 1732(F) The given character is not a valid pack type. See L<perlfunc/pack>.
fb73857a
PP
1733(W) The given character is not a valid pack type but used to be silently
1734ignored.
96e4d5b1
PP
1735
1736=item Invalid type in unpack: '%s'
1737
8903cb82 1738(F) The given character is not a valid unpack type. See L<perlfunc/unpack>.
fb73857a
PP
1739(W) The given character is not a valid unpack type but used to be silently
1740ignored.
96e4d5b1 1741
a0d0e21e
LW
1742=item ioctl is not implemented
1743
1744(F) Your machine apparently doesn't implement ioctl(), which is pretty
1745strange for a machine that supports C.
1746
1747=item junk on end of regexp
1748
1749(P) The regular expression parser is confused.
1750
1751=item Label not found for "last %s"
1752
1753(F) You named a loop to break out of, but you're not currently in a
1754loop of that name, not even if you count where you were called from.
1755See L<perlfunc/last>.
1756
1757=item Label not found for "next %s"
1758
1759(F) You named a loop to continue, but you're not currently in a loop of
1760that name, not even if you count where you were called from. See
1761L<perlfunc/last>.
1762
1763=item Label not found for "redo %s"
1764
1765(F) You named a loop to restart, but you're not currently in a loop of
1766that name, not even if you count where you were called from. See
1767L<perlfunc/last>.
1768
85ab1d1d 1769=item leaving effective %s failed
5ff3f7a4 1770
85ab1d1d 1771(F) While under the C<use filetest> pragma, switching the real and
5ff3f7a4
GS
1772effective uids or gids failed.
1773
9a7dcd9c 1774=item listen() on closed socket
a0d0e21e
LW
1775
1776(W) You tried to do a listen on a closed socket. Did you forget to check
1777the return value of your socket() call? See L<perlfunc/listen>.
1778
cd06dffe
GS
1779=item Lvalue subs returning %s not implemented yet
1780
1781(F) Due to limitations in the current implementation, array and hash
1782values cannot be returned in subroutines used in lvalue context.
1783See L<perlsub/"Lvalue subroutines">.
1784
a0d0e21e
LW
1785=item Method for operation %s not found in package %s during blessing
1786
1787(F) An attempt was made to specify an entry in an overloading table that
e7ea3e70 1788doesn't resolve to a valid subroutine. See L<overload>.
a0d0e21e 1789
3cdd684c
TP
1790=item Method %s not permitted
1791
1792See Server error.
1793
a0d0e21e
LW
1794=item Might be a runaway multi-line %s string starting on line %d
1795
1796(S) An advisory indicating that the previous error may have been caused
1797by a missing delimiter on a string or pattern, because it eventually
1798ended earlier on the current line.
1799
1800=item Misplaced _ in number
1801
1802(W) An underline in a decimal constant wasn't on a 3-digit boundary.
1803
1804=item Missing $ on loop variable
1805
8b1a09fc
PP
1806(F) Apparently you've been programming in B<csh> too much. Variables are always
1807mentioned with the $ in Perl, unlike in the shells, where it can vary from
a0d0e21e
LW
1808one line to the next.
1809
4a2d328f 1810=item Missing %sbrace%s on \N{}
423cee85 1811
4a2d328f 1812(F) Wrong syntax of character name literal C<\N{charname}> within
423cee85
JH
1813double-quotish context.
1814
a0d0e21e
LW
1815=item Missing comma after first argument to %s function
1816
1817(F) While certain functions allow you to specify a filehandle or an
1818"indirect object" before the argument list, this ain't one of them.
1819
06eaf0bc
GS
1820=item Missing command in piped open
1821
1822(W) You used the C<open(FH, "| command")> or C<open(FH, "command |")>
1823construction, but the command was missing or blank.
1824
748a9306
LW
1825=item Missing operator before %s?
1826
1827(S) This is an educated guess made in conjunction with the message "%s
1828found where operator expected". Often the missing operator is a comma.
1829
d98d5fff 1830=item Missing right curly or square bracket
a0d0e21e 1831
d98d5fff
GS
1832(F) The lexer counted more opening curly or square brackets than
1833closing ones. As a general rule, you'll find it's missing near the place
1834you were last editing.
a0d0e21e 1835
a0d0e21e
LW
1836=item Modification of a read-only value attempted
1837
1838(F) You tried, directly or indirectly, to change the value of a
5f05dabc 1839constant. You didn't, of course, try "2 = 1", because the compiler
a0d0e21e
LW
1840catches that. But an easy way to do the same thing is:
1841
1842 sub mod { $_[0] = 1 }
1843 mod(2);
1844
1845Another way is to assign to a substr() that's off the end of the string.
1846
4fe4fdb3 1847=item Modification of non-creatable array value attempted, subscript %d
a0d0e21e
LW
1848
1849(F) You tried to make an array value spring into existence, and the
1850subscript was probably negative, even counting from end of the array
1851backwards.
1852
4fe4fdb3 1853=item Modification of non-creatable hash value attempted, subscript "%s"
a0d0e21e 1854
19a09eb8 1855(P) You tried to make a hash value spring into existence, and it couldn't
a0d0e21e
LW
1856be created for some peculiar reason.
1857
1858=item Module name must be constant
1859
1860(F) Only a bare module name is allowed as the first argument to a "use".
1861
1862=item msg%s not implemented
1863
1864(F) You don't have System V message IPC on your system.
1865
1866=item Multidimensional syntax %s not supported
1867
8b1a09fc
PP
1868(W) Multidimensional arrays aren't written like C<$foo[1,2,3]>. They're written
1869like C<$foo[1][2][3]>, as in C.
1870
09bef843
SB
1871=item Missing name in "my sub"
1872
1873(F) The reserved syntax for lexically scoped subroutines requires that they
1874have a name with which they can be found.
1875
8b1a09fc
PP
1876=item Name "%s::%s" used only once: possible typo
1877
68dc0745
PP
1878(W) Typographical errors often show up as unique variable names.
1879If you had a good reason for having a unique name, then just mention
77ca0c92
LW
1880it again somehow to suppress the message. The C<our> declaration is
1881provided for this purpose.
a0d0e21e
LW
1882
1883=item Negative length
1884
1885(F) You tried to do a read/write/send/recv operation with a buffer length
1886that is less than 0. This is difficult to imagine.
1887
1888=item nested *?+ in regexp
1889
5f05dabc 1890(F) You can't quantify a quantifier without intervening parentheses. So
a0d0e21e
LW
1891things like ** or +* or ?* are illegal.
1892
5f05dabc 1893Note, however, that the minimal matching quantifiers, C<*?>, C<+?>, and C<??> appear
a0d0e21e
LW
1894to be nested quantifiers, but aren't. See L<perlre>.
1895
1896=item No #! line
1897
1898(F) The setuid emulator requires that scripts have a well-formed #! line
1899even on machines that don't support the #! construct.
1900
1901=item No %s allowed while running setuid
1902
1903(F) Certain operations are deemed to be too insecure for a setuid or setgid
1904script to even be allowed to attempt. Generally speaking there will be
1905another way to do what you want that is, if not secure, at least securable.
1906See L<perlsec>.
1907
1908=item No B<-e> allowed in setuid scripts
1909
1910(F) A setuid script can't be specified by the user.
1911
a67e862a
GS
1912=item No %s specified for -%c
1913
1914(F) The indicated command line switch needs a mandatory argument, but
1915you haven't specified one.
1916
a0d0e21e
LW
1917=item No comma allowed after %s
1918
1919(F) A list operator that has a filehandle or "indirect object" is not
1920allowed to have a comma between that and the following arguments.
1921Otherwise it'd be just another one of the arguments.
1922
0a753a76
PP
1923One possible cause for this is that you expected to have imported a
1924constant to your name space with B<use> or B<import> while no such
1925importing took place, it may for example be that your operating system
1926does not support that particular constant. Hopefully you did use an
1927explicit import list for the constants you expect to see, please see
1928L<perlfunc/use> and L<perlfunc/import>. While an explicit import list
1929would probably have caught this error earlier it naturally does not
1930remedy the fact that your operating system still does not support that
1931constant. Maybe you have a typo in the constants of the symbol import
1932list of B<use> or B<import> or in the constant name at the line where
1933this error was triggered?
1934
748a9306
LW
1935=item No command into which to pipe on command line
1936
1937(F) An error peculiar to VMS. Perl handles its own command line redirection,
54310121 1938and found a '|' at the end of the command line, so it doesn't know where you
748a9306
LW
1939want to pipe the output from this command.
1940
a0d0e21e
LW
1941=item No DB::DB routine defined
1942
1943(F) The currently executing code was compiled with the B<-d> switch,
1944but for some reason the perl5db.pl file (or some facsimile thereof)
1945didn't define a routine to be called at the beginning of each
1946statement. Which is odd, because the file should have been required
1947automatically, and should have blown up the require if it didn't parse
1948right.
1949
1950=item No dbm on this machine
1951
1952(P) This is counted as an internal error, because every machine should
5f05dabc 1953supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>.
a0d0e21e
LW
1954
1955=item No DBsub routine
1956
1957(F) The currently executing code was compiled with the B<-d> switch,
1958but for some reason the perl5db.pl file (or some facsimile thereof)
1959didn't define a DB::sub routine to be called at the beginning of each
1960ordinary subroutine call.
1961
8b1a09fc 1962=item No error file after 2E<gt> or 2E<gt>E<gt> on command line
748a9306
LW
1963
1964(F) An error peculiar to VMS. Perl handles its own command line redirection,
8b1a09fc
PP
1965and found a '2E<gt>' or a '2E<gt>E<gt>' on the command line, but can't find
1966the name of the file to which to write data destined for stderr.
748a9306 1967
8b1a09fc 1968=item No input file after E<lt> on command line
748a9306
LW
1969
1970(F) An error peculiar to VMS. Perl handles its own command line redirection,
8b1a09fc
PP
1971and found a 'E<lt>' on the command line, but can't find the name of the file
1972from which to read data for stdin.
748a9306 1973
8b1a09fc 1974=item No output file after E<gt> on command line
748a9306
LW
1975
1976(F) An error peculiar to VMS. Perl handles its own command line redirection,
8b1a09fc 1977and found a lone 'E<gt>' at the end of the command line, so it doesn't know
54310121 1978where you wanted to redirect stdout.
748a9306 1979
8b1a09fc 1980=item No output file after E<gt> or E<gt>E<gt> on command line
748a9306
LW
1981
1982(F) An error peculiar to VMS. Perl handles its own command line redirection,
8b1a09fc
PP
1983and found a 'E<gt>' or a 'E<gt>E<gt>' on the command line, but can't find the
1984name of the file to which to write data destined for stdout.
748a9306 1985
a0d0e21e
LW
1986=item No Perl script found in input
1987
1988(F) You called C<perl -x>, but no line was found in the file beginning
1989with #! and containing the word "perl".
1990
1991=item No setregid available
1992
1993(F) Configure didn't find anything resembling the setregid() call for
1994your system.
1995
1996=item No setreuid available
1997
1998(F) Configure didn't find anything resembling the setreuid() call for
1999your system.
2000
a67e862a 2001=item No space allowed after -%c
a0d0e21e 2002
a67e862a
GS
2003(F) The argument to the indicated command line switch must follow immediately
2004after the switch, without intervening spaces.
a0d0e21e 2005
88e9b055 2006=item No such pseudo-hash field "%s"
57079c46 2007
88e9b055 2008(F) You tried to access an array as a hash, but the field name used is
57079c46
GA
2009not defined. The hash at index 0 should map all valid field names to
2010array indices for that to work.
2011
88e9b055 2012=item No such pseudo-hash field "%s" in variable %s of type %s
f1192cee
GA
2013
2014(F) You tried to access a field of a typed variable where the type
2015does not know about the field name. The field names are looked up in
2016the %FIELDS hash in the type package at compile time. The %FIELDS hash
2017is usually set up with the 'fields' pragma.
2018
748a9306
LW
2019=item No such pipe open
2020
2021(P) An error peculiar to VMS. The internal routine my_pclose() tried to
2022close a pipe which hadn't been opened. This should have been caught earlier as
2023an attempt to close an unopened filehandle.
2024
a0d0e21e
LW
2025=item No such signal: SIG%s
2026
2027(W) You specified a signal name as a subscript to %SIG that was not recognized.
2028Say C<kill -l> in your shell to see the valid signal names on your system.
2029
bd3fa61c
CB
2030=item no UTC offset information; assuming local time is UTC
2031
db7c17d7 2032(S) A warning peculiar to VMS. Perl was unable to find the local
f675dbe5
CB
2033timezone offset, so it's assuming that local system time is equivalent
2034to UTC. If it's not, define the logical name F<SYS$TIMEZONE_DIFFERENTIAL>
2035to translate to the number of seconds which need to be added to UTC to
2036get local time.
2037
a0d0e21e
LW
2038=item Not a CODE reference
2039
2040(F) Perl was trying to evaluate a reference to a code value (that is, a
2041subroutine), but found a reference to something else instead. You can
2042use the ref() function to find out what kind of ref it really was.
2043See also L<perlref>.
2044
2045=item Not a format reference
2046
2047(F) I'm not sure how you managed to generate a reference to an anonymous
2048format, but this indicates you did, and that it didn't exist.
2049
2050=item Not a GLOB reference
2051
55497cff 2052(F) Perl was trying to evaluate a reference to a "typeglob" (that is,
a0d0e21e
LW
2053a symbol table entry that looks like C<*foo>), but found a reference to
2054something else instead. You can use the ref() function to find out
2055what kind of ref it really was. See L<perlref>.
2056
2057=item Not a HASH reference
2058
2059(F) Perl was trying to evaluate a reference to a hash value, but
2060found a reference to something else instead. You can use the ref()
2061function to find out what kind of ref it really was. See L<perlref>.
2062
2063=item Not a perl script
2064
2065(F) The setuid emulator requires that scripts have a well-formed #! line
2066even on machines that don't support the #! construct. The line must
2067mention perl.
2068
2069=item Not a SCALAR reference
2070
2071(F) Perl was trying to evaluate a reference to a scalar value, but
2072found a reference to something else instead. You can use the ref()
2073function to find out what kind of ref it really was. See L<perlref>.
2074
2075=item Not a subroutine reference
2076
2077(F) Perl was trying to evaluate a reference to a code value (that is, a
2078subroutine), but found a reference to something else instead. You can
2079use the ref() function to find out what kind of ref it really was.
2080See also L<perlref>.
2081
e7ea3e70 2082=item Not a subroutine reference in overload table
a0d0e21e
LW
2083
2084(F) An attempt was made to specify an entry in an overloading table that
8b1a09fc 2085doesn't somehow point to a valid subroutine. See L<overload>.
a0d0e21e
LW
2086
2087=item Not an ARRAY reference
2088
2089(F) Perl was trying to evaluate a reference to an array value, but
2090found a reference to something else instead. You can use the ref()
2091function to find out what kind of ref it really was. See L<perlref>.
2092
2093=item Not enough arguments for %s
2094
2095(F) The function requires more arguments than you specified.
2096
2097=item Not enough format arguments
2098
2099(W) A format specified more picture fields than the next line supplied.
2100See L<perlform>.
2101
2102=item Null filename used
2103
5f05dabc 2104(F) You can't require the null filename, especially because on many machines
a0d0e21e
LW
2105that means the current directory! See L<perlfunc/require>.
2106
55497cff
PP
2107=item Null picture in formline
2108
2109(F) The first argument to formline must be a valid format picture
2110specification. It was found to be empty, which probably means you
2111supplied it an uninitialized value. See L<perlform>.
2112
a0d0e21e
LW
2113=item NULL OP IN RUN
2114
2115(P) Some internal routine called run() with a null opcode pointer.
2116
2117=item Null realloc
2118
2119(P) An attempt was made to realloc NULL.
2120
2121=item NULL regexp argument
2122
5f05dabc 2123(P) The internal pattern matching routines blew it big time.
a0d0e21e
LW
2124
2125=item NULL regexp parameter
2126
2127(P) The internal pattern matching routines are out of their gourd.
2128
fc36a67e
PP
2129=item Number too long
2130
2131(F) Perl limits the representation of decimal numbers in programs to about
2132about 250 characters. You've exceeded that length. Future versions of
2133Perl are likely to eliminate this arbitrary limitation. In the meantime,
2134try using scientific notation (e.g. "1e6" instead of "1_000_000").
2135
252aa082
JH
2136=item Octal number > 037777777777 non-portable
2137
9e24b6e2
JH
2138(W) The octal number you specified is larger than 2**32-1 (4294967295)
2139and therefore non-portable between systems. See L<perlport> for more
2140on portability concerns.
252aa082
JH
2141
2142See also L<perlport> for writing portable code.
2143
1930e939 2144=item Odd number of elements in hash assignment
a0d0e21e 2145
1930e939
TP
2146(S) You specified an odd number of elements to initialize a hash, which
2147is odd, because hashes come in key/value pairs.
a0d0e21e 2148
bbce6d69
PP
2149=item Offset outside string
2150
2151(F) You tried to do a read/write/send/recv operation with an offset
2152pointing outside the buffer. This is difficult to imagine.
2153The sole exception to this is that C<sysread()>ing past the buffer
2154will extend the buffer and zero pad the new area.
2155
a0d0e21e
LW
2156=item oops: oopsAV
2157
2158(S) An internal warning that the grammar is screwed up.
2159
2160=item oops: oopsHV
2161
2162(S) An internal warning that the grammar is screwed up.
2163
56f7f34b 2164=item Operation `%s': no method found, %s
44a8e56a 2165
e7ea3e70
IZ
2166(F) An attempt was made to perform an overloaded operation for which
2167no handler was defined. While some handlers can be autogenerated in
2168terms of other handlers, there is no default handler for any
2169operation, unless C<fallback> overloading key is specified to be
2170true. See L<overload>.
44a8e56a 2171
748a9306
LW
2172=item Operator or semicolon missing before %s
2173
2174(S) You used a variable or subroutine call where the parser was
2175expecting an operator. The parser has assumed you really meant
2176to use an operator, but this is highly likely to be incorrect.
2177For example, if you say "*foo *foo" it will be interpreted as
2178if you said "*foo * 'foo'".
2179
a80b8354
GS
2180=item Out of memory!
2181
2182(X) The malloc() function returned 0, indicating there was insufficient
2183remaining memory (or virtual memory) to satisfy the request. Perl
2184has no option but to exit immediately.
2185
a0d0e21e
LW
2186=item Out of memory for yacc stack
2187
2188(F) The yacc parser wanted to grow its stack so it could continue parsing,
2189but realloc() wouldn't give it more memory, virtual or otherwise.
2190
1b979e0a 2191=item Out of memory during request for %s
a0d0e21e 2192
55497cff 2193(X|F) The malloc() function returned 0, indicating there was insufficient
54310121 2194remaining memory (or virtual memory) to satisfy the request.
eff9c6e2
CS
2195
2196The request was judged to be small, so the possibility to trap it
2197depends on the way perl was compiled. By default it is not trappable.
2198However, if compiled for this, Perl may use the contents of C<$^M> as
2199an emergency pool after die()ing with this message. In this case the
55497cff
PP
2200error is trappable I<once>.
2201
1b979e0a 2202=item Out of memory during "large" request for %s
55497cff
PP
2203
2204(F) The malloc() function returned 0, indicating there was insufficient
2205remaining memory (or virtual memory) to satisfy the request. However,
2206the request was judged large enough (compile-time default is 64K), so
2207a possibility to shut down by trapping this error is granted.
2208
1b979e0a
IZ
2209=item Out of memory during ridiculously large request
2210
2211(F) You can't allocate more than 2^31+"small amount" bytes. This error
2212is most likely to be caused by a typo in the Perl program. e.g., C<$arr[time]>
2213instead of C<$arr[$time]>.
2214
a0d0e21e
LW
2215=item page overflow
2216
2217(W) A single call to write() produced more lines than can fit on a page.
2218See L<perlform>.
2219
2220=item panic: ck_grep
2221
2222(P) Failed an internal consistency check trying to compile a grep.
2223
2224=item panic: ck_split
2225
2226(P) Failed an internal consistency check trying to compile a split.
2227
2228=item panic: corrupt saved stack index
2229
2230(P) The savestack was requested to restore more localized values than there
2231are in the savestack.
2232
810b8aa5
GS
2233=item panic: del_backref
2234
2235(P) Failed an internal consistency check while trying to reset a weak
2236reference.
2237
a0d0e21e
LW
2238=item panic: die %s
2239
2240(P) We popped the context stack to an eval context, and then discovered
2241it wasn't an eval context.
2242
2243=item panic: do_match
2244
2245(P) The internal pp_match() routine was called with invalid operational data.
2246
2247=item panic: do_split
2248
2249(P) Something terrible went wrong in setting up for the split.
2250
2251=item panic: do_subst
2252
2253(P) The internal pp_subst() routine was called with invalid operational data.
2254
2255=item panic: do_trans
2256
2257(P) The internal do_trans() routine was called with invalid operational data.
2258
c635e13b
PP
2259=item panic: frexp
2260
2261(P) The library function frexp() failed, making printf("%f") impossible.
2262
a0d0e21e
LW
2263=item panic: goto
2264
2265(P) We popped the context stack to a context with the specified label,
2266and then discovered it wasn't a context we know how to do a goto in.
2267
2268=item panic: INTERPCASEMOD
2269
2270(P) The lexer got into a bad state at a case modifier.
2271
2272=item panic: INTERPCONCAT
2273
2274(P) The lexer got into a bad state parsing a string with brackets.
2275
e446cec8
IZ
2276=item panic: kid popen errno read
2277
2278(F) forked child returned an incomprehensible message about its errno.
2279
a0d0e21e
LW
2280=item panic: last
2281
2282(P) We popped the context stack to a block context, and then discovered
2283it wasn't a block context.
2284
2285=item panic: leave_scope clearsv
2286
5f05dabc 2287(P) A writable lexical variable became read-only somehow within the scope.
a0d0e21e
LW
2288
2289=item panic: leave_scope inconsistency
2290
2291(P) The savestack probably got out of sync. At least, there was an
2292invalid enum on the top of it.
2293
2294=item panic: malloc
2295
2296(P) Something requested a negative number of bytes of malloc.
2297
810b8aa5
GS
2298=item panic: magic_killbackrefs
2299
2300(P) Failed an internal consistency check while trying to reset all weak
2301references to an object.
2302
a0d0e21e
LW
2303=item panic: mapstart
2304
2305(P) The compiler is screwed up with respect to the map() function.
2306
2307=item panic: null array
2308
2309(P) One of the internal array routines was passed a null AV pointer.
2310
2311=item panic: pad_alloc
2312
2313(P) The compiler got confused about which scratch pad it was allocating
2314and freeing temporaries and lexicals from.
2315
2316=item panic: pad_free curpad
2317
2318(P) The compiler got confused about which scratch pad it was allocating
2319and freeing temporaries and lexicals from.
2320
2321=item panic: pad_free po
2322
2323(P) An invalid scratch pad offset was detected internally.
2324
2325=item panic: pad_reset curpad
2326
2327(P) The compiler got confused about which scratch pad it was allocating
2328and freeing temporaries and lexicals from.
2329
2330=item panic: pad_sv po
2331
2332(P) An invalid scratch pad offset was detected internally.
2333
2334=item panic: pad_swipe curpad
2335
2336(P) The compiler got confused about which scratch pad it was allocating
2337and freeing temporaries and lexicals from.
2338
2339=item panic: pad_swipe po
2340
2341(P) An invalid scratch pad offset was detected internally.
2342
2343=item panic: pp_iter
2344
2345(P) The foreach iterator got called in a non-loop context frame.
2346
2347=item panic: realloc
2348
2349(P) Something requested a negative number of bytes of realloc.
2350
2351=item panic: restartop
2352
2353(P) Some internal routine requested a goto (or something like it), and
2354didn't supply the destination.
2355
2356=item panic: return
2357
2358(P) We popped the context stack to a subroutine or eval context, and
2359then discovered it wasn't a subroutine or eval context.
2360
2361=item panic: scan_num
2362
2363(P) scan_num() got called on something that wasn't a number.
2364
2365=item panic: sv_insert
2366
2367(P) The sv_insert() routine was told to remove more string than there
2368was string.
2369
2370=item panic: top_env
2371
6224f72b 2372(P) The compiler attempted to do a goto, or something weird like that.
a0d0e21e
LW
2373
2374=item panic: yylex
2375
2376(P) The lexer got into a bad state while processing a case modifier.
2377
b3c9acc1
IZ
2378=item panic: %s
2379
2380(P) An internal error.
2381
7b8d334a 2382=item Parentheses missing around "%s" list
a0d0e21e
LW
2383
2384(W) You said something like
2385
2386 my $foo, $bar = @_;
2387
2388when you meant
2389
2390 my ($foo, $bar) = @_;
2391
2392Remember that "my" and "local" bind closer than comma.
2393
2394=item Perl %3.3f required--this is only version %s, stopped
2395
2396(F) The module in question uses features of a version of Perl more recent
2397than the currently running version. How long has it been since you upgraded,
2398anyway? See L<perlfunc/require>.
2399
2400=item Permission denied
2401
2402(F) The setuid emulator in suidperl decided you were up to no good.
2403
bd3fa61c 2404=item pid %x not a child
748a9306
LW
2405
2406(W) A warning peculiar to VMS. Waitpid() was asked to wait for a process which
2407isn't a subprocess of the current process. While this is fine from VMS'
2408perspective, it's probably not what you intended.
2409
a0d0e21e
LW
2410=item POSIX getpgrp can't take an argument
2411
81777298 2412(F) Your system has POSIX getpgrp(), which takes no argument, unlike
a0d0e21e
LW
2413the BSD version, which takes a pid.
2414
6bc102ca
GS
2415=item Possible Y2K bug: %s
2416
2417(W) You are concatenating the number 19 with another number, which
2418could be a potential Year 2000 problem.
2419
bbce6d69
PP
2420=item Possible attempt to put comments in qw() list
2421
774d564b
PP
2422(W) qw() lists contain items separated by whitespace; as with literal
2423strings, comment characters are not ignored, but are instead treated
2424as literal data. (You may have used different delimiters than the
7b8d334a 2425parentheses shown here; braces are also frequently used.)
bbce6d69 2426
774d564b
PP
2427You probably wrote something like this:
2428
54310121 2429 @list = qw(
774d564b 2430 a # a comment
bbce6d69 2431 b # another comment
774d564b 2432 );
bbce6d69
PP
2433
2434when you should have written this:
2435
774d564b 2436 @list = qw(
54310121
PP
2437 a
2438 b
774d564b
PP
2439 );
2440
2441If you really want comments, build your list the
2442old-fashioned way, with quotes and commas:
2443
2444 @list = (
2445 'a', # a comment
2446 'b', # another comment
2447 );
bbce6d69
PP
2448
2449=item Possible attempt to separate words with commas
2450
774d564b 2451(W) qw() lists contain items separated by whitespace; therefore commas
68dc0745 2452aren't needed to separate the items. (You may have used different
774d564b
PP
2453delimiters than the parentheses shown here; braces are also frequently
2454used.)
bbce6d69 2455
54310121 2456You probably wrote something like this:
bbce6d69 2457
774d564b
PP
2458 qw! a, b, c !;
2459
2460which puts literal commas into some of the list items. Write it without
2461commas if you don't want them to appear in your data:
bbce6d69 2462
774d564b 2463 qw! a b c !;
bbce6d69 2464
a0d0e21e
LW
2465=item Possible memory corruption: %s overflowed 3rd argument
2466
2467(F) An ioctl() or fcntl() returned more than Perl was bargaining for.
2468Perl guesses a reasonable buffer size, but puts a sentinel byte at the
2469end of the buffer just in case. This sentinel byte got clobbered, and
2470Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>.
2471
2472=item Precedence problem: open %s should be open(%s)
2473
2474(S) The old irregular construct
cb1a09d0 2475
a0d0e21e
LW
2476 open FOO || die;
2477
2478is now misinterpreted as
2479
2480 open(FOO || die);
2481
68dc0745
PP
2482because of the strict regularization of Perl 5's grammar into unary
2483and list operators. (The old open was a little of both.) You must
2484put parentheses around the filehandle, or use the new "or" operator
2485instead of "||".
a0d0e21e 2486
3cdd684c
TP
2487=item Premature end of script headers
2488
2489See Server error.
2490
9a7dcd9c 2491=item print() on closed filehandle %s
a0d0e21e
LW
2492
2493(W) The filehandle you're printing on got itself closed sometime before now.
2494Check your logic flow.
2495
9a7dcd9c 2496=item printf() on closed filehandle %s
a0d0e21e
LW
2497
2498(W) The filehandle you're writing to got itself closed sometime before now.
2499Check your logic flow.
2500
2501=item Probable precedence problem on %s
2502
54310121 2503(W) The compiler found a bareword where it expected a conditional,
a0d0e21e
LW
2504which often indicates that an || or && was parsed as part of the
2505last argument of the previous construct, for example:
2506
2507 open FOO || die;
2508
3fe9a6f1 2509=item Prototype mismatch: %s vs %s
4633a7c4 2510
3fe9a6f1
PP
2511(S) The subroutine being declared or defined had previously been declared
2512or defined with a different function prototype.
4633a7c4 2513
89ea2908
GA
2514=item Range iterator outside integer range
2515
2516(F) One (or both) of the numeric arguments to the range operator ".."
2517are outside the range which can be represented by integers internally.
2518One possible workaround is to force Perl to use magical string
2519increment by prepending "0" to your numbers.
2520
9a7dcd9c 2521=item readline() on closed filehandle %s
a0d0e21e
LW
2522
2523(W) The filehandle you're reading from got itself closed sometime before now.
2524Check your logic flow.
2525
4ad56ec9
IZ
2526=item realloc() of freed memory ignored
2527
2528(S) An internal routine called realloc() on something that had already
2529been freed.
2530
a0d0e21e
LW
2531=item Reallocation too large: %lx
2532
54310121 2533(F) You can't allocate more than 64K on an MS-DOS machine.
a0d0e21e
LW
2534
2535=item Recompile perl with B<-D>DEBUGGING to use B<-D> switch
2536
2537(F) You can't use the B<-D> option unless the code to produce the
2538desired output is compiled into Perl, which entails some overhead,
2539which is why it's currently left out of your copy.
2540
3e0ccd42 2541=item Recursive inheritance detected in package '%s'
a0d0e21e
LW
2542
2543(F) More than 100 levels of inheritance were used. Probably indicates
2544an unintended loop in your inheritance hierarchy.
2545
3e0ccd42
JP
2546=item Recursive inheritance detected while looking for method '%s' in package '%s'
2547
2548(F) More than 100 levels of inheritance were encountered while invoking a
2549method. Probably indicates an unintended loop in your inheritance hierarchy.
2550
1930e939
TP
2551=item Reference found where even-sized list expected
2552
2553(W) You gave a single reference where Perl was expecting a list with
2554an even number of elements (for assignment to a hash). This
2555usually means that you used the anon hash constructor when you meant
2556to use parens. In any case, a hash requires key/value B<pairs>.
7b8d334a
GS
2557
2558 %hash = { one => 1, two => 2, }; # WRONG
2559 %hash = [ qw/ an anon array / ]; # WRONG
2560 %hash = ( one => 1, two => 2, ); # right
2561 %hash = qw( one 1 two 2 ); # also fine
2562
810b8aa5
GS
2563=item Reference is already weak
2564
2565(W) You have attempted to weaken a reference that is already weak.
2566Doing so has no effect.
2567
a0d0e21e
LW
2568=item Reference miscount in sv_replace()
2569
2570(W) The internal sv_replace() function was handed a new SV with a
2571reference count of other than 1.
2572
fb73857a
PP
2573=item regexp *+ operand could be empty
2574
2575(F) The part of the regexp subject to either the * or + quantifier
2576could match an empty string.
2577
a0d0e21e
LW
2578=item regexp memory corruption
2579
2580(P) The regular expression engine got confused by what the regular
2581expression compiler gave it.
2582
2583=item regexp out of space
2584
2585(P) A "can't happen" error, because safemalloc() should have caught it earlier.
2586
a0d0e21e
LW
2587=item Reversed %s= operator
2588
2589(W) You wrote your assignment operator backwards. The = must always
2590comes last, to avoid ambiguity with subsequent unary operators.
2591
2592=item Runaway format
2593
2594(F) Your format contained the ~~ repeat-until-blank sequence, but it
2595produced 200 lines at once, and the 200th line looked exactly like the
2596199th line. Apparently you didn't arrange for the arguments to exhaust
2597themselves, either by using ^ instead of @ (for scalar variables), or by
2598shifting or popping (for array variables). See L<perlform>.
2599
2600=item Scalar value @%s[%s] better written as $%s[%s]
2601
a6006777 2602(W) You've used an array slice (indicated by @) to select a single element of
a0d0e21e 2603an array. Generally it's better to ask for a scalar value (indicated by $).
8b1a09fc
PP
2604The difference is that C<$foo[&bar]> always behaves like a scalar, both when
2605assigning to it and when evaluating its argument, while C<@foo[&bar]> behaves
a0d0e21e 2606like a list when you assign to it, and provides a list context to its
5f05dabc 2607subscript, which can do weird things if you're expecting only one subscript.
a0d0e21e 2608
748a9306 2609On the other hand, if you were actually hoping to treat the array
5f05dabc 2610element as a list, you need to look into how references work, because
748a9306
LW
2611Perl will not magically convert between scalars and lists for you. See
2612L<perlref>.
2613
a6006777
PP
2614=item Scalar value @%s{%s} better written as $%s{%s}
2615
2616(W) You've used a hash slice (indicated by @) to select a single element of
2617a hash. Generally it's better to ask for a scalar value (indicated by $).
2618The difference is that C<$foo{&bar}> always behaves like a scalar, both when
2619assigning to it and when evaluating its argument, while C<@foo{&bar}> behaves
2620like a list when you assign to it, and provides a list context to its
2621subscript, which can do weird things if you're expecting only one subscript.
2622
2623On the other hand, if you were actually hoping to treat the hash
2624element as a list, you need to look into how references work, because
2625Perl will not magically convert between scalars and lists for you. See
2626L<perlref>.
2627
a0d0e21e
LW
2628=item Script is not setuid/setgid in suidperl
2629
54310121
PP
2630(F) Oddly, the suidperl program was invoked on a script without a setuid
2631or setgid bit set. This doesn't make much sense.
a0d0e21e
LW
2632
2633=item Search pattern not terminated
2634
2635(F) The lexer couldn't find the final delimiter of a // or m{}
2636construct. Remember that bracketing delimiters count nesting level.
fb73857a 2637Missing the leading C<$> from a variable C<$m> may cause this error.
a0d0e21e 2638
96e4d5b1 2639=item %sseek() on unopened file
a0d0e21e 2640
96e4d5b1
PP
2641(W) You tried to use the seek() or sysseek() function on a filehandle that
2642was either never opened or has since been closed.
a0d0e21e
LW
2643
2644=item select not implemented
2645
2646(F) This machine doesn't implement the select() system call.
2647
2648=item sem%s not implemented
2649
2650(F) You don't have System V semaphore IPC on your system.
2651
2652=item semi-panic: attempt to dup freed string
2653
2654(S) The internal newSVsv() routine was called to duplicate a scalar
2655that had previously been marked as free.
2656
2657=item Semicolon seems to be missing
2658
2659(W) A nearby syntax error was probably caused by a missing semicolon,
2660or possibly some other missing operator, such as a comma.
2661
9a7dcd9c 2662=item send() on closed socket
a0d0e21e 2663
9a7dcd9c 2664(W) The socket you're sending to got itself closed sometime before now.
a0d0e21e
LW
2665Check your logic flow.
2666
1b1626e4 2667=item Sequence (? incomplete
7b8d334a 2668
1b1626e4
G
2669(F) A regular expression ended with an incomplete extension (?.
2670See L<perlre>.
2671
a0d0e21e
LW
2672=item Sequence (?#... not terminated
2673
2674(F) A regular expression comment must be terminated by a closing
5f05dabc 2675parenthesis. Embedded parentheses aren't allowed. See L<perlre>.
a0d0e21e
LW
2676
2677=item Sequence (?%s...) not implemented
2678
2679(F) A proposed regular expression extension has the character reserved
2680but has not yet been written. See L<perlre>.
2681
2682=item Sequence (?%s...) not recognized
2683
2684(F) You used a regular expression extension that doesn't make sense.
2685See L<perlre>.
2686
a5f75d66
AD
2687=item Server error
2688
3cdd684c
TP
2689This is the error message generally seen in a browser window when trying
2690to run a CGI program (including SSI) over the web. The actual error
2691text varies widely from server to server. The most frequently-seen
2692variants are "500 Server error", "Method (something) not permitted",
2693"Document contains no data", "Premature end of script headers", and
2694"Did not produce a valid header".
9607fc9c
PP
2695
2696B<This is a CGI error, not a Perl error>.
2697
2698You need to make sure your script is executable, is accessible by the user
2699CGI is running the script under (which is probably not the user account you
2700tested it under), does not rely on any environment variables (like PATH)
2701from the user it isn't running under, and isn't in a location where the CGI
2702server can't find it, basically, more or less. Please see the following
2703for more information:
2704
be94a901
GS
2705 http://www.perl.com/CPAN/doc/FAQs/cgi/idiots-guide.html
2706 http://www.perl.com/CPAN/doc/FAQs/cgi/perl-cgi-faq.html
9607fc9c
PP
2707 ftp://rtfm.mit.edu/pub/usenet/news.answers/www/cgi-faq
2708 http://hoohoo.ncsa.uiuc.edu/cgi/interface.html
2709 http://www-genome.wi.mit.edu/WWW/faqs/www-security-faq.html
a5f75d66 2710
be94a901
GS
2711You should also look at L<perlfaq9>.
2712
a0d0e21e
LW
2713=item setegid() not implemented
2714
8b1a09fc 2715(F) You tried to assign to C<$)>, and your operating system doesn't support
a0d0e21e
LW
2716the setegid() system call (or equivalent), or at least Configure didn't
2717think so.
2718
2719=item seteuid() not implemented
2720
8b1a09fc 2721(F) You tried to assign to C<$E<gt>>, and your operating system doesn't support
a0d0e21e
LW
2722the seteuid() system call (or equivalent), or at least Configure didn't
2723think so.
2724
81777298
GS
2725=item setpgrp can't take arguments
2726
2727(F) Your system has the setpgrp() from BSD 4.2, which takes no arguments,
2728unlike POSIX setpgid(), which takes a process ID and process group ID.
2729
a0d0e21e
LW
2730=item setrgid() not implemented
2731
8b1a09fc 2732(F) You tried to assign to C<$(>, and your operating system doesn't support
a0d0e21e
LW
2733the setrgid() system call (or equivalent), or at least Configure didn't
2734think so.
2735
2736=item setruid() not implemented
2737
1f8d2005 2738(F) You tried to assign to C<$E<lt>>, and your operating system doesn't support
a0d0e21e
LW
2739the setruid() system call (or equivalent), or at least Configure didn't
2740think so.
2741
2742=item Setuid/gid script is writable by world
2743
2744(F) The setuid emulator won't run a script that is writable by the world,
2745because the world might have written on it already.
2746
2747=item shm%s not implemented
2748
2749(F) You don't have System V shared memory IPC on your system.
2750
9a7dcd9c 2751=item shutdown() on closed socket
a0d0e21e
LW
2752
2753(W) You tried to do a shutdown on a closed socket. Seems a bit superfluous.
2754
f86702cc 2755=item SIG%s handler "%s" not defined
a0d0e21e
LW
2756
2757(W) The signal handler named in %SIG doesn't, in fact, exist. Perhaps you
2758put it into the wrong package?
2759
2760=item sort is now a reserved word
2761
2762(F) An ancient error message that almost nobody ever runs into anymore.
2763But before sort was a keyword, people sometimes used it as a filehandle.
2764
2765=item Sort subroutine didn't return a numeric value
2766
2767(F) A sort comparison routine must return a number. You probably blew
4633a7c4 2768it by not using C<E<lt>=E<gt>> or C<cmp>, or by not using them correctly.
a0d0e21e
LW
2769See L<perlfunc/sort>.
2770
2771=item Sort subroutine didn't return single value
2772
2773(F) A sort comparison subroutine may not return a list value with more
2774or less than one element. See L<perlfunc/sort>.
2775
2776=item Split loop
2777
2778(P) The split was looping infinitely. (Obviously, a split shouldn't iterate
2779more times than there are characters of input, which is what happened.)
2780See L<perlfunc/split>.
2781
8b1a09fc 2782=item Stat on unopened file E<lt>%sE<gt>
a0d0e21e
LW
2783
2784(W) You tried to use the stat() function (or an equivalent file test)
54310121 2785on a filehandle that was either never opened or has since been closed.
a0d0e21e
LW
2786
2787=item Statement unlikely to be reached
2788
2789(W) You did an exec() with some statement after it other than a die().
2790This is almost always an error, because exec() never returns unless
2791there was a failure. You probably wanted to use system() instead,
2792which does return. To suppress this warning, put the exec() in a block
2793by itself.
2794
17feb5d5
DD
2795=item Strange *+?{} on zero-length expression
2796
2797(W) You applied a regular expression quantifier in a place where it
2798makes no sense, such as on a zero-width assertion.
2799Try putting the quantifier inside the assertion instead. For example,
2800the way to match "abc" provided that it is followed by three
2801repetitions of "xyz" is C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>.
2802
e7ea3e70
IZ
2803=item Stub found while resolving method `%s' overloading `%s' in package `%s'
2804
2805(P) Overloading resolution over @ISA tree may be broken by importation stubs.
2806Stubs should never be implicitely created, but explicit calls to C<can>
2807may break this.
2808
a0d0e21e
LW
2809=item Subroutine %s redefined
2810
2811(W) You redefined a subroutine. To suppress this warning, say
2812
2813 {
4438c4b7 2814 no warnings;
a0d0e21e
LW
2815 eval "sub name { ... }";
2816 }
2817
2818=item Substitution loop
2819
2820(P) The substitution was looping infinitely. (Obviously, a
2821substitution shouldn't iterate more times than there are characters of
68dc0745 2822input, which is what happened.) See the discussion of substitution in
5f05dabc 2823L<perlop/"Quote and Quote-like Operators">.
a0d0e21e
LW
2824
2825=item Substitution pattern not terminated
2826
2827(F) The lexer couldn't find the interior delimiter of a s/// or s{}{}
2828construct. Remember that bracketing delimiters count nesting level.
fb73857a 2829Missing the leading C<$> from variable C<$s> may cause this error.
a0d0e21e
LW
2830
2831=item Substitution replacement not terminated
2832
2833(F) The lexer couldn't find the final delimiter of a s/// or s{}{}
2834construct. Remember that bracketing delimiters count nesting level.
fb73857a 2835Missing the leading C<$> from variable C<$s> may cause this error.
a0d0e21e
LW
2836
2837=item substr outside of string
2838
3e3baf6d
TB
2839(S),(W) You tried to reference a substr() that pointed outside of a
2840string. That is, the absolute value of the offset was larger than the
2841length of the string. See L<perlfunc/substr>. This warning is
2842mandatory if substr is used in an lvalue context (as the left hand side
2843of an assignment or as a subroutine argument for example).
a0d0e21e 2844
f86702cc 2845=item suidperl is no longer needed since %s
a0d0e21e
LW
2846
2847(F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a
2848version of the setuid emulator somehow got run anyway.
2849
85ab1d1d
JH
2850=item switching effective %s is not implemented
2851
2852(F) While under the C<use filetest> pragma, we cannot switch the
2853real and effective uids or gids.
2854
a0d0e21e
LW
2855=item syntax error
2856
2857(F) Probably means you had a syntax error. Common reasons include:
2858
2859 A keyword is misspelled.
2860 A semicolon is missing.
2861 A comma is missing.
2862 An opening or closing parenthesis is missing.
2863 An opening or closing brace is missing.
2864 A closing quote is missing.
2865
2866Often there will be another error message associated with the syntax
2867error giving more information. (Sometimes it helps to turn on B<-w>.)
2868The error message itself often tells you where it was in the line when
2869it decided to give up. Sometimes the actual error is several tokens
5f05dabc 2870before this, because Perl is good at understanding random input.
a0d0e21e
LW
2871Occasionally the line number may be misleading, and once in a blue moon
2872the only way to figure out what's triggering the error is to call
2873C<perl -c> repeatedly, chopping away half the program each time to see
2874if the error went away. Sort of the cybernetic version of S<20 questions>.
2875
cb1a09d0
AD
2876=item syntax error at line %d: `%s' unexpected
2877
8b1a09fc 2878(A) You've accidentally run your script through the Bourne shell
3a52c276 2879instead of Perl. Check the #! line, or manually feed your script
cb1a09d0
AD
2880into Perl yourself.
2881
6087ac44 2882=item System V %s is not implemented on this machine
a0d0e21e 2883
6087ac44
JH
2884(F) You tried to do something with a function beginning with "sem",
2885"shm", or "msg" but that System V IPC is not implemented in your
2886machine. In some machines the functionality can exist but be
2887unconfigured. Consult your system support.
a0d0e21e 2888
9a7dcd9c 2889=item syswrite() on closed filehandle
a0d0e21e
LW
2890
2891(W) The filehandle you're writing to got itself closed sometime before now.
2892Check your logic flow.
2893
fc36a67e
PP
2894=item Target of goto is too deeply nested
2895
2896(F) You tried to use C<goto> to reach a label that was too deeply
2897nested for Perl to reach. Perl is doing you a favor by refusing.
2898
8903cb82 2899=item tell() on unopened file
a0d0e21e 2900
8903cb82
PP
2901(W) You tried to use the tell() function on a filehandle that was either
2902never opened or has since been closed.
a0d0e21e 2903
8b1a09fc 2904=item Test on unopened file E<lt>%sE<gt>
a0d0e21e
LW
2905
2906(W) You tried to invoke a file test operator on a filehandle that isn't
2907open. Check your logic. See also L<perlfunc/-X>.
2908
2909=item That use of $[ is unsupported
2910
8b1a09fc 2911(F) Assignment to C<$[> is now strictly circumscribed, and interpreted as
5f05dabc 2912a compiler directive. You may say only one of
a0d0e21e
LW
2913
2914 $[ = 0;
2915 $[ = 1;
2916 ...
2917 local $[ = 0;
2918 local $[ = 1;
2919 ...
2920
2921This is to prevent the problem of one module changing the array base
2922out from under another module inadvertently. See L<perlvar/$[>.
2923
2924=item The %s function is unimplemented
2925
2926The function indicated isn't implemented on this architecture, according
2927to the probings of Configure.
2928
f86702cc 2929=item The crypt() function is unimplemented due to excessive paranoia
a0d0e21e
LW
2930
2931(F) Configure couldn't find the crypt() function on your machine,
2932probably because your vendor didn't supply it, probably because they
8b1a09fc 2933think the U.S. Government thinks it's a secret, or at least that they
a0d0e21e
LW
2934will continue to pretend that it is. And if you quote me on that, I
2935will deny it.
2936
2937=item The stat preceding C<-l _> wasn't an lstat
2938
2939(F) It makes no sense to test the current stat buffer for symbolic linkhood
2940if the last stat that wrote to the stat buffer already went past
2941the symlink to get to the real file. Use an actual filename instead.
2942
437784d6 2943=item This Perl can't reset CRTL environ elements (%s)
f675dbe5
CB
2944
2945=item This Perl can't set CRTL environ elements (%s=%s)
2946
2947(W) Warnings peculiar to VMS. You tried to change or delete an element
2948of the CRTL's internal environ array, but your copy of Perl wasn't
2949built with a CRTL that contained the setenv() function. You'll need to
2950rebuild Perl with a CRTL that does, or redefine F<PERL_ENV_TABLES> (see
2951L<perlvms>) so that the environ array isn't the target of the change to
2952%ENV which produced the warning.
2953
a0d0e21e
LW
2954=item times not implemented
2955
2956(F) Your version of the C library apparently doesn't do times(). I suspect
2957you're not running on Unix.
2958
2959=item Too few args to syscall
2960
2961(F) There has to be at least one argument to syscall() to specify the
2962system call to call, silly dilly.
2963
9607fc9c
PP
2964=item Too late for "B<-T>" option
2965
2966(X) The #! line (or local equivalent) in a Perl script contains the
8cc95fdb
PP
2967B<-T> option, but Perl was not invoked with B<-T> in its command line.
2968This is an error because, by the time Perl discovers a B<-T> in a
2969script, it's too late to properly taint everything from the environment.
2970So Perl gives up.
f86702cc 2971
9607fc9c
PP
2972If the Perl script is being executed as a command using the #!
2973mechanism (or its local equivalent), this error can usually be fixed
2974by editing the #! line so that the B<-T> option is a part of Perl's
2975first argument: e.g. change C<perl -n -T> to C<perl -T -n>.
f86702cc 2976
9607fc9c
PP
2977If the Perl script is being executed as C<perl scriptname>, then the
2978B<-T> option must appear on the command line: C<perl -T scriptname>.
f86702cc 2979
8cc95fdb
PP
2980=item Too late for "-%s" option
2981
2982(X) The #! line (or local equivalent) in a Perl script contains the
2983B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options
2984are not intended for use inside scripts. Use the C<use> pragma instead.
2985
cb1a09d0
AD
2986=item Too many ('s
2987
2988=item Too many )'s
2989
2990(A) You've accidentally run your script through B<csh> instead
3a52c276
CS
2991of Perl. Check the #! line, or manually feed your script into
2992Perl yourself.
cb1a09d0 2993
a0d0e21e
LW
2994=item Too many args to syscall
2995
5f05dabc 2996(F) Perl supports a maximum of only 14 args to syscall().
a0d0e21e
LW
2997
2998=item Too many arguments for %s
2999
3000(F) The function requires fewer arguments than you specified.
3001
3002=item trailing \ in regexp
3003
3004(F) The regular expression ends with an unbackslashed backslash. Backslash
3005it. See L<perlre>.
3006
2c268ad5 3007=item Transliteration pattern not terminated
a0d0e21e
LW
3008
3009(F) The lexer couldn't find the interior delimiter of a tr/// or tr[][]
fb73857a
PP
3010or y/// or y[][] construct. Missing the leading C<$> from variables
3011C<$tr> or C<$y> may cause this error.
a0d0e21e 3012
2c268ad5 3013=item Transliteration replacement not terminated
a0d0e21e
LW
3014
3015(F) The lexer couldn't find the final delimiter of a tr/// or tr[][]
3016construct.
3017
3018=item truncate not implemented
3019
3020(F) Your machine doesn't implement a file truncation mechanism that
3021Configure knows about.
3022
3023=item Type of arg %d to %s must be %s (not %s)
3024
3025(F) This function requires the argument in that position to be of a
8b1a09fc
PP
3026certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be
3027%NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the
a0d0e21e
LW
3028{EXPR} forms as an explicit dereference. See L<perlref>.
3029
3030=item umask: argument is missing initial 0
3031
eec2d3df
GS
3032(W) A umask of 222 is incorrect. It should be 0222, because octal
3033literals always start with 0 in Perl, as in C.
3034
3035=item umask not implemented
3036
3037(F) Your machine doesn't implement the umask function and you tried
3038to use it to restrict permissions for yourself (EXPR & 0700).
a0d0e21e 3039
4633a7c4
LW
3040=item Unable to create sub named "%s"
3041
3042(F) You attempted to create or access a subroutine with an illegal name.
3043
a0d0e21e
LW
3044=item Unbalanced context: %d more PUSHes than POPs
3045
3046(W) The exit code detected an internal inconsistency in how many execution
3047contexts were entered and left.
3048
3049=item Unbalanced saves: %d more saves than restores
3050
3051(W) The exit code detected an internal inconsistency in how many
3052values were temporarily localized.
3053
3054=item Unbalanced scopes: %d more ENTERs than LEAVEs
3055
3056(W) The exit code detected an internal inconsistency in how many blocks
3057were entered and left.
3058
3059=item Unbalanced tmps: %d more allocs than frees
3060
3061(W) The exit code detected an internal inconsistency in how many mortal
3062scalars were allocated and freed.
3063
3064=item Undefined format "%s" called
3065
3066(F) The format indicated doesn't seem to exist. Perhaps it's really in
3067another package? See L<perlform>.
3068
3069=item Undefined sort subroutine "%s" called
3070
3071(F) The sort comparison routine specified doesn't seem to exist. Perhaps
3072it's in a different package? See L<perlfunc/sort>.
3073
3074=item Undefined subroutine &%s called
3075
3076(F) The subroutine indicated hasn't been defined, or if it was, it
3077has since been undefined.
3078
3079=item Undefined subroutine called
3080
3081(F) The anonymous subroutine you're trying to call hasn't been defined,
3082or if it was, it has since been undefined.
3083
3084=item Undefined subroutine in sort
3085
3086(F) The sort comparison routine specified is declared but doesn't seem to
3087have been defined yet. See L<perlfunc/sort>.
3088
4633a7c4
LW
3089=item Undefined top format "%s" called
3090
3091(F) The format indicated doesn't seem to exist. Perhaps it's really in
3092another package? See L<perlform>.
3093
20408e3c
GS
3094=item Undefined value assigned to typeglob
3095
3096(W) An undefined value was assigned to a typeglob, a la C<*foo = undef>.
3097This does nothing. It's possible that you really mean C<undef *foo>.
3098
a0d0e21e
LW
3099=item unexec of %s into %s failed!
3100
3101(F) The unexec() routine failed for some reason. See your local FSF
3102representative, who probably put it there in the first place.
3103
3104=item Unknown BYTEORDER
3105
5f05dabc 3106(F) There are no byte-swapping functions for a machine with this byte order.
a0d0e21e 3107
6170680b
IZ
3108=item Unknown open() mode '%s'
3109
437784d6
GS
3110(F) The second argument of 3-argument open() is not among the list
3111of valid modes: C<L<lt>>, C<L<gt>>, C<E<gt>E<gt>>, C<+L<lt>>,
3112C<+L<gt>>, C<+E<gt>E<gt>>, C<-|>, C<|->.
6170680b 3113
f675dbe5
CB
3114=item Unknown process %x sent message to prime_env_iter: %s
3115
3116(P) An error peculiar to VMS. Perl was reading values for %ENV before
3117iterating over it, and someone else stuck a message in the stream of
3118data Perl expected. Someone's very confused, or perhaps trying to
3119subvert Perl's population of %ENV for nefarious purposes.
3120
a0d0e21e
LW
3121=item unmatched () in regexp
3122
3123(F) Unbackslashed parentheses must always be balanced in regular
3124expressions. If you're a vi user, the % key is valuable for finding
5f05dabc 3125the matching parenthesis. See L<perlre>.
a0d0e21e 3126
d98d5fff 3127=item Unmatched right %s bracket
a0d0e21e 3128
d98d5fff
GS
3129(F) The lexer counted more closing curly or square brackets than
3130opening ones, so you're probably missing a matching opening bracket.
3131As a general rule, you'll find the missing one (so to speak) near the
3132place you were last editing.
a0d0e21e
LW
3133
3134=item unmatched [] in regexp
3135
3136(F) The brackets around a character class must match. If you wish to
3137include a closing bracket in a character class, backslash it or put it first.
3138See L<perlre>.
3139
3140=item Unquoted string "%s" may clash with future reserved word
3141
54310121 3142(W) You used a bareword that might someday be claimed as a reserved word.
a0d0e21e
LW
3143It's best to put such a word in quotes, or capitalize it somehow, or insert
3144an underbar into it. You might also declare it as a subroutine.
3145
54310121 3146=item Unrecognized character %s
a0d0e21e 3147
54310121
PP
3148(F) The Perl parser has no idea what to do with the specified character
3149in your Perl script (or eval). Perhaps you tried to run a compressed
3150script, a binary program, or a directory as a Perl program.
a0d0e21e 3151
c9f97d15
IZ
3152=item Unrecognized escape \\%c passed through
3153
3154(W) You used a backslash-character combination which is not recognized
3155by Perl.
3156
a0d0e21e
LW
3157=item Unrecognized signal name "%s"
3158
3159(F) You specified a signal name to the kill() function that was not recognized.
3160Say C<kill -l> in your shell to see the valid signal names on your system.
3161
90248788 3162=item Unrecognized switch: -%s (-h will show valid options)
a0d0e21e
LW
3163
3164(F) You specified an illegal option to Perl. Don't do that.
3165(If you think you didn't do that, check the #! line to see if it's
3166supplying the bad switch on your behalf.)
3167
3168=item Unsuccessful %s on filename containing newline
3169
3170(W) A file operation was attempted on a filename, and that operation
3171failed, PROBABLY because the filename contained a newline, PROBABLY
54310121 3172because you forgot to chop() or chomp() it off. See L<perlfunc/chomp>.
a0d0e21e
LW
3173
3174=item Unsupported directory function "%s" called
3175
3176(F) Your machine doesn't support opendir() and readdir().
3177
54310121
PP
3178=item Unsupported function fork
3179
3180(F) Your version of executable does not support forking.
3181
3182Note that under some systems, like OS/2, there may be different flavors of
3183Perl executables, some of which may support fork, some not. Try changing
3184the name you call Perl by to C<perl_>, C<perl__>, and so on.
3185
a0d0e21e
LW
3186=item Unsupported function %s
3187
7b8d334a 3188(F) This machine doesn't implement the indicated function, apparently.
a0d0e21e
LW
3189At least, Configure doesn't think so.
3190
3191=item Unsupported socket function "%s" called
3192
3193(F) Your machine doesn't support the Berkeley socket mechanism, or at
3194least that's what Configure thought.
3195
8b1a09fc 3196=item Unterminated E<lt>E<gt> operator
a0d0e21e
LW
3197
3198(F) The lexer saw a left angle bracket in a place where it was expecting
3199a term, so it's looking for the corresponding right angle bracket, and not
3200finding it. Chances are you left some needed parentheses out earlier in
3201the line, and you really meant a "less than".
3202
09bef843
SB
3203=item Unterminated attribute parameter in attribute list
3204
3205(F) The lexer saw an opening (left) parenthesis character while parsing an
3206attribute list, but the matching closing (right) parenthesis
3207character was not found. You may need to add (or remove) a backslash
3208character to get your parentheses to balance. See L<attributes>.
3209
3210=item Unterminated attribute list
3211
3212(F) The lexer found something other than a simple identifier at the start
3213of an attribute, and it wasn't a semicolon or the start of a
3214block. Perhaps you terminated the parameter list of the previous attribute
3215too soon. See L<attributes>.
3216
a0d0e21e
LW
3217=item Use of $# is deprecated
3218
8b1a09fc 3219(D) This was an ill-advised attempt to emulate a poorly defined B<awk> feature.
a0d0e21e
LW
3220Use an explicit printf() or sprintf() instead.
3221
3222=item Use of $* is deprecated
3223
4a6725af 3224(D) This variable magically turned on multi-line pattern matching, both for
a0d0e21e
LW
3225you and for any luckless subroutine that you happen to call. You should
3226use the new C<//m> and C<//s> modifiers now to do that without the dangerous
3227action-at-a-distance effects of C<$*>.
3228
748a9306
LW
3229=item Use of %s in printf format not supported
3230
5f05dabc
PP
3231(F) You attempted to use a feature of printf that is accessible from
3232only C. This usually means there's a better way to do it in Perl.
748a9306 3233
8b1a09fc 3234=item Use of bare E<lt>E<lt> to mean E<lt>E<lt>"" is deprecated
4633a7c4
LW
3235
3236(D) You are now encouraged to use the explicitly quoted form if you
3fe9a6f1 3237wish to use an empty line as the terminator of the here-document.
4633a7c4 3238
a0d0e21e
LW
3239=item Use of implicit split to @_ is deprecated
3240
3241(D) It makes a lot of work for the compiler when you clobber a
3242subroutine's argument list, so it's better if you assign the results of
3243a split() explicitly to an array (or list).
3244
dc848c6f
PP
3245=item Use of inherited AUTOLOAD for non-method %s() is deprecated
3246
5cd24f17
PP
3247(D) As an (ahem) accidental feature, C<AUTOLOAD> subroutines are looked
3248up as methods (using the C<@ISA> hierarchy) even when the subroutines to
3249be autoloaded were called as plain functions (e.g. C<Foo::bar()>), not
7b8d334a 3250as methods (e.g. C<Foo-E<gt>bar()> or C<$obj-E<gt>bar()>).
dc848c6f
PP
3251
3252This bug will be rectified in Perl 5.005, which will use method lookup
3253only for methods' C<AUTOLOAD>s. However, there is a significant base
3254of existing code that may be using the old behavior. So, as an
3255interim step, Perl 5.004 issues an optional warning when non-methods
3256use inherited C<AUTOLOAD>s.
3257
3258The simple rule is: Inheritance will not work when autoloading
3259non-methods. The simple fix for old code is: In any module that used to
3260depend on inheriting C<AUTOLOAD> for non-methods from a base class named
3261C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during startup.
3262
fb73857a
PP
3263In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> you
3264should remove AutoLoader from @ISA and change C<use AutoLoader;> to
7b8d334a 3265C<use AutoLoader 'AUTOLOAD';>.
fb73857a 3266
85b81015
LW
3267=item Use of reserved word "%s" is deprecated
3268
3269(D) The indicated bareword is a reserved word. Future versions of perl
3270may use it as a keyword, so you're better off either explicitly quoting
3271the word in a manner appropriate for its context of use, or using a
3272different name altogether. The warning can be suppressed for subroutine
3273names by either adding a C<&> prefix, or using a package qualifier,
3274e.g. C<&our()>, or C<Foo::our()>.
3275
dc848c6f
PP
3276=item Use of %s is deprecated
3277
3278(D) The construct indicated is no longer recommended for use, generally
3279because there's a better way to do it, and also because the old way has
3280bad side effects.
3281
cc95b072 3282=item Use of uninitialized value%s
a0d0e21e
LW
3283
3284(W) An undefined value was used as if it were already defined. It was
3285interpreted as a "" or a 0, but maybe it was a mistake. To suppress this
5311ebfa 3286warning assign a defined value to your variables.
a0d0e21e 3287
8202fd39
G
3288=item Useless use of "re" pragma
3289
3290(W) You did C<use re;> without any arguments. That isn't very useful.
3291
a0d0e21e
LW
3292=item Useless use of %s in void context
3293
3294(W) You did something without a side effect in a context that does nothing
3295with the return value, such as a statement that doesn't return a value
3296from a block, or the left side of a scalar comma operator. Very often
3297this points not to stupidity on your part, but a failure of Perl to parse
3298your program the way you thought it would. For example, you'd get this
3299if you mixed up your C precedence with Python precedence and said
3300
3301 $one, $two = 1, 2;
3302
3303when you meant to say
3304
3305 ($one, $two) = (1, 2);
3306
748a9306
LW
3307Another common error is to use ordinary parentheses to construct a list
3308reference when you should be using square or curly brackets, for
3309example, if you say
3310
3311 $array = (1,2);
3312
3313when you should have said
3314
3315 $array = [1,2];
3316
3317The square brackets explicitly turn a list value into a scalar value,
3318while parentheses do not. So when a parenthesized list is evaluated in
3319a scalar context, the comma is treated like C's comma operator, which
3320throws away the left argument, which is not what you want. See
3321L<perlref> for more on this.
3322
55497cff
PP
3323=item untie attempted while %d inner references still exist
3324
3325(W) A copy of the object returned from C<tie> (or C<tied>) was still
3326valid when C<untie> was called.
3327
68dc0745 3328=item Value of %s can be "0"; test with defined()
a6006777 3329
68dc0745
PP
3330(W) In a conditional expression, you used <HANDLE>, <*> (glob), C<each()>,
3331or C<readdir()> as a boolean value. Each of these constructs can return a
3332value of "0"; that would make the conditional expression false, which is
3333probably not what you intended. When using these constructs in conditional
3334expressions, test their values with the C<defined> operator.
a6006777 3335
f675dbe5
CB
3336=item Value of CLI symbol "%s" too long
3337
3338(W) A warning peculiar to VMS. Perl tried to read the value of an %ENV
3339element from a CLI symbol table, and found a resultant string longer
3340than 1024 characters. The return value has been truncated to 1024
3341characters.
3342
9607fc9c 3343=item Variable "%s" is not imported%s
4633a7c4
LW
3344
3345(F) While "use strict" in effect, you referred to a global variable
3346that you apparently thought was imported from another module, because
3347something else of the same name (usually a subroutine) is exported
3348by that module. It usually means you put the wrong funny character
3349on the front of your variable.
3350
44a8e56a
PP
3351=item Variable "%s" may be unavailable
3352
3353(W) An inner (nested) I<anonymous> subroutine is inside a I<named>
3354subroutine, and outside that is another subroutine; and the anonymous
3355(innermost) subroutine is referencing a lexical variable defined in
3356the outermost subroutine. For example:
3357
3358 sub outermost { my $a; sub middle { sub { $a } } }
3359
3360If the anonymous subroutine is called or referenced (directly or
3361indirectly) from the outermost subroutine, it will share the variable
3362as you would expect. But if the anonymous subroutine is called or
3363referenced when the outermost subroutine is not active, it will see
3364the value of the shared variable as it was before and during the
3365*first* call to the outermost subroutine, which is probably not what
3366you want.
3367
3368In these circumstances, it is usually best to make the middle
3369subroutine anonymous, using the C<sub {}> syntax. Perl has specific
3370support for shared variables in nested anonymous subroutines; a named
3371subroutine in between interferes with this feature.
3372
3373=item Variable "%s" will not stay shared
3374
3375(W) An inner (nested) I<named> subroutine is referencing a lexical
3376variable defined in an outer subroutine.
3377
3378When the inner subroutine is called, it will probably see the value of
3379the outer subroutine's variable as it was before and during the
3380*first* call to the outer subroutine; in this case, after the first
3381call to the outer subroutine is complete, the inner and outer
3382subroutines will no longer share a common value for the variable. In
3383other words, the variable will no longer be shared.
3384
3385Furthermore, if the outer subroutine is anonymous and references a
3386lexical variable outside itself, then the outer and inner subroutines
3387will I<never> share the given variable.
3388
3389This problem can usually be solved by making the inner subroutine
3390anonymous, using the C<sub {}> syntax. When inner anonymous subs that
3391reference variables in outer subroutines are called or referenced,
54310121 3392they are automatically rebound to the current values of such
44a8e56a
PP
3393variables.
3394
f86702cc 3395=item Variable syntax
cb1a09d0
AD
3396
3397(A) You've accidentally run your script through B<csh> instead
3a52c276
CS
3398of Perl. Check the #! line, or manually feed your script into
3399Perl yourself.
cb1a09d0 3400
084610c0
GS
3401=item Version number must be a constant number
3402
3403(P) The attempt to translate a C<use Module n.n LIST> statement into
3404its equivalent C<BEGIN> block found an internal inconsistency with
3405the version number.
3406
3e6e419a
JH
3407=item perl: warning: Setting locale failed.
3408
3409(S) The whole warning message will look something like:
3410
3411 perl: warning: Setting locale failed.
3412 perl: warning: Please check that your locale settings:
3413 LC_ALL = "En_US",
3414 LANG = (unset)
3415 are supported and installed on your system.
3416 perl: warning: Falling back to the standard locale ("C").
3417
3418Exactly what were the failed locale settings varies. In the above the
3419settings were that the LC_ALL was "En_US" and the LANG had no value.
3420This error means that Perl detected that you and/or your system
3421administrator have set up the so-called variable system but Perl could
3422not use those settings. This was not dead serious, fortunately: there
3423is a "default locale" called "C" that Perl can and will use, the
3424script will be run. Before you really fix the problem, however, you
3425will get the same error message each time you run Perl. How to really
3426fix the problem can be found in L<perllocale> section B<LOCALE PROBLEMS>.
3427
7e1af8bc 3428=item Warning: something's wrong
5f05dabc
PP
3429
3430(W) You passed warn() an empty string (the equivalent of C<warn "">) or
3431you called it with no args and C<$_> was empty.
3432
f86702cc 3433=item Warning: unable to close filehandle %s properly
a0d0e21e 3434
8b1a09fc 3435(S) The implicit close() done by an open() got an error indication on the
5f05dabc 3436close(). This usually indicates your file system ran out of disk space.
a0d0e21e 3437
5f05dabc 3438=item Warning: Use of "%s" without parentheses is ambiguous
a0d0e21e
LW
3439
3440(S) You wrote a unary operator followed by something that looks like a
3441binary operator that could also have been interpreted as a term or
3442unary operator. For instance, if you know that the rand function
3443has a default argument of 1.0, and you write
3444
3445 rand + 5;
3446
3447you may THINK you wrote the same thing as
3448
3449 rand() + 5;
3450
3451but in actual fact, you got
3452
3453 rand(+5);
3454
5f05dabc 3455So put in parentheses to say what you really mean.
a0d0e21e 3456
9a7dcd9c 3457=item write() on closed filehandle %s
a0d0e21e
LW
3458
3459(W) The filehandle you're writing to got itself closed sometime before now.
3460Check your logic flow.
3461
3462=item X outside of string
3463
3464(F) You had a pack template that specified a relative position before
3465the beginning of the string being unpacked. See L<perlfunc/pack>.
3466
3467=item x outside of string
3468
3469(F) You had a pack template that specified a relative position after
3470the end of the string being unpacked. See L<perlfunc/pack>.
3471
3472=item Xsub "%s" called in sort
3473
3474(F) The use of an external subroutine as a sort comparison is not yet supported.
3475
3476=item Xsub called in sort
3477
3478(F) The use of an external subroutine as a sort comparison is not yet supported.
3479
3480=item You can't use C<-l> on a filehandle
3481
3482(F) A filehandle represents an opened file, and when you opened the file it
3483already went past any symlink you are presumably trying to look for.
3484Use a filename instead.
3485
3486=item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!
3487
5f05dabc 3488(F) And you probably never will, because you probably don't have the
a0d0e21e
LW
3489sources to your kernel, and your vendor probably doesn't give a rip
3490about what you want. Your best bet is to use the wrapsuid script in
3491the eg directory to put a setuid C wrapper around your script.
3492
3493=item You need to quote "%s"
3494
3495(W) You assigned a bareword as a signal handler name. Unfortunately, you
3496already have a subroutine of that name declared, which means that Perl 5
3497will try to call the subroutine when the assignment is executed, which is
3498probably not what you want. (If it IS what you want, put an & in front.)
3499
9a7dcd9c 3500=item %cetsockopt() on closed fd
a0d0e21e
LW
3501
3502(W) You tried to get or set a socket option on a closed socket.
3503Did you forget to check the return value of your socket() call?
9a7dcd9c 3504See L<perlfunc/getsockopt> and L<perlfunc/setsockopt>.
a0d0e21e
LW
3505
3506=item \1 better written as $1
3507
3508(W) Outside of patterns, backreferences live on as variables. The use
5f05dabc 3509of backslashes is grandfathered on the right-hand side of a
a0d0e21e
LW
3510substitution, but stylistically it's better to use the variable form
3511because other Perl programmers will expect it, and it works better
3512if there are more than 9 backreferences.
3513
8b1a09fc 3514=item '|' and 'E<lt>' may not both be specified on command line
748a9306
LW
3515
3516(F) An error peculiar to VMS. Perl does its own command line redirection, and
3517found that STDIN was a pipe, and that you also tried to redirect STDIN using
8b1a09fc 3518'E<lt>'. Only one STDIN stream to a customer, please.
748a9306 3519
8b1a09fc 3520=item '|' and 'E<gt>' may not both be specified on command line
748a9306
LW
3521
3522(F) An error peculiar to VMS. Perl does its own command line redirection, and
3523thinks you tried to redirect stdout both to a file and into a pipe to another
3524command. You need to choose one or the other, though nothing's stopping you
3525from piping into a program or Perl script which 'splits' output into two
3526streams, such as
3527
3528 open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!";
3529 while (<STDIN>) {
3530 print;
3531 print OUT;
3532 }
3533 close OUT;
3534
774d564b 3535=item Got an error from DosAllocMem
33c8a3fe 3536
774d564b
PP
3537(P) An error peculiar to OS/2. Most probably you're using an obsolete
3538version of Perl, and this should not happen anyway.
33c8a3fe
IZ
3539
3540=item Malformed PERLLIB_PREFIX
3541
dc848c6f 3542(F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form
33c8a3fe
IZ
3543
3544 prefix1;prefix2
3545
3546or
3547
3548 prefix1 prefix2
3549
dc848c6f
PP
3550with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix
3551of a builtin library search path, prefix2 is substituted. The error
3552may appear if components are not found, or are too long. See
3553"PERLLIB_PREFIX" in F<README.os2>.
33c8a3fe
IZ
3554
3555=item PERL_SH_DIR too long
3556
54310121 3557(F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the
dc848c6f 3558C<sh>-shell in. See "PERL_SH_DIR" in F<README.os2>.
33c8a3fe
IZ
3559
3560=item Process terminated by SIG%s
3561
3562(W) This is a standard message issued by OS/2 applications, while *nix
dc848c6f
PP
3563applications die in silence. It is considered a feature of the OS/2
3564port. One can easily disable this by appropriate sighandlers, see
3565L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT"
3566in F<README.os2>.
33c8a3fe 3567
a0d0e21e
LW
3568=back
3569