Commit | Line | Data |
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a0d0e21e LW |
1 | =head1 NAME |
2 | ||
3 | perldiag - various Perl diagnostics | |
4 | ||
5 | =head1 DESCRIPTION | |
6 | ||
7 | These messages are classified as follows (listed in increasing order of | |
8 | desperation): | |
9 | ||
10 | (W) A warning (optional). | |
11 | (D) A deprecation (optional). | |
e476b1b5 | 12 | (S) A severe warning (default). |
a0d0e21e LW |
13 | (F) A fatal error (trappable). |
14 | (P) An internal error you should never see (trappable). | |
54310121 | 15 | (X) A very fatal error (nontrappable). |
cb1a09d0 | 16 | (A) An alien error message (not generated by Perl). |
a0d0e21e | 17 | |
75b44862 GS |
18 | The majority of messages from the first three classifications above |
19 | (W, D & S) can be controlled using the C<warnings> pragma. | |
e476b1b5 GS |
20 | |
21 | If a message can be controlled by the C<warnings> pragma, its warning | |
22 | category is included with the classification letter in the description | |
23 | below. | |
24 | ||
25 | Optional warnings are enabled by using the C<warnings> pragma or the B<-w> | |
26 | and B<-W> switches. Warnings may be captured by setting C<$SIG{__WARN__}> | |
27 | to a reference to a routine that will be called on each warning instead | |
28 | of printing it. See L<perlvar>. | |
29 | ||
30 | Default warnings are always enabled unless they are explicitly disabled | |
31 | with the C<warnings> pragma or the B<-X> switch. | |
4438c4b7 | 32 | |
748a9306 | 33 | Trappable errors may be trapped using the eval operator. See |
4438c4b7 JH |
34 | L<perlfunc/eval>. In almost all cases, warnings may be selectively |
35 | disabled or promoted to fatal errors using the C<warnings> pragma. | |
36 | See L<warnings>. | |
a0d0e21e | 37 | |
6df41af2 GS |
38 | The messages are in alphabetical order, without regard to upper or |
39 | lower-case. Some of these messages are generic. Spots that vary are | |
40 | denoted with a %s or other printf-style escape. These escapes are | |
41 | ignored by the alphabetical order, as are all characters other than | |
42 | letters. To look up your message, just ignore anything that is not a | |
43 | letter. | |
a0d0e21e LW |
44 | |
45 | =over 4 | |
46 | ||
6df41af2 | 47 | =item accept() on closed socket %s |
33633739 | 48 | |
be771a83 GS |
49 | (W closed) You tried to do an accept on a closed socket. Did you forget |
50 | to check the return value of your socket() call? See | |
51 | L<perlfunc/accept>. | |
33633739 | 52 | |
6df41af2 | 53 | =item Allocation too large: %lx |
a0d0e21e | 54 | |
6df41af2 | 55 | (X) You can't allocate more than 64K on an MS-DOS machine. |
a0d0e21e | 56 | |
f61d411c | 57 | =item '!' allowed only after types %s |
ef54e1a4 | 58 | |
f61d411c JH |
59 | (F) The '!' is allowed in pack() and unpack() only after certain types. |
60 | See L<perlfunc/pack>. | |
ef54e1a4 | 61 | |
6df41af2 | 62 | =item Ambiguous call resolved as CORE::%s(), qualify as such or use & |
43192e07 | 63 | |
75b44862 | 64 | (W ambiguous) A subroutine you have declared has the same name as a Perl |
be771a83 GS |
65 | keyword, and you have used the name without qualification for calling |
66 | one or the other. Perl decided to call the builtin because the | |
67 | subroutine is not imported. | |
43192e07 | 68 | |
6df41af2 GS |
69 | To force interpretation as a subroutine call, either put an ampersand |
70 | before the subroutine name, or qualify the name with its package. | |
71 | Alternatively, you can import the subroutine (or pretend that it's | |
72 | imported with the C<use subs> pragma). | |
43192e07 | 73 | |
6df41af2 GS |
74 | To silently interpret it as the Perl operator, use the C<CORE::> prefix |
75 | on the operator (e.g. C<CORE::log($x)>) or by declaring the subroutine | |
be771a83 GS |
76 | to be an object method (see L<perlsub/"Subroutine Attributes"> or |
77 | L<attributes>). | |
43192e07 | 78 | |
6df41af2 | 79 | =item Ambiguous use of %s resolved as %s |
43192e07 | 80 | |
6df41af2 GS |
81 | (W ambiguous)(S) You said something that may not be interpreted the way |
82 | you thought. Normally it's pretty easy to disambiguate it by supplying | |
83 | a missing quote, operator, parenthesis pair or declaration. | |
a0d0e21e | 84 | |
6df41af2 | 85 | =item '|' and '<' may not both be specified on command line |
a0d0e21e | 86 | |
be771a83 GS |
87 | (F) An error peculiar to VMS. Perl does its own command line |
88 | redirection, and found that STDIN was a pipe, and that you also tried to | |
89 | redirect STDIN using '<'. Only one STDIN stream to a customer, please. | |
c9f97d15 | 90 | |
6df41af2 | 91 | =item '|' and '>' may not both be specified on command line |
1028017a | 92 | |
be771a83 GS |
93 | (F) An error peculiar to VMS. Perl does its own command line |
94 | redirection, and thinks you tried to redirect stdout both to a file and | |
95 | into a pipe to another command. You need to choose one or the other, | |
96 | though nothing's stopping you from piping into a program or Perl script | |
97 | which 'splits' output into two streams, such as | |
1028017a | 98 | |
6df41af2 GS |
99 | open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!"; |
100 | while (<STDIN>) { | |
101 | print; | |
102 | print OUT; | |
103 | } | |
104 | close OUT; | |
c9f97d15 | 105 | |
6df41af2 | 106 | =item Applying %s to %s will act on scalar(%s) |
eb6e2d6f | 107 | |
be771a83 GS |
108 | (W misc) The pattern match (//), substitution (s///), and |
109 | transliteration (tr///) operators work on scalar values. If you apply | |
110 | one of them to an array or a hash, it will convert the array or hash to | |
111 | a scalar value -- the length of an array, or the population info of a | |
112 | hash -- and then work on that scalar value. This is probably not what | |
113 | you meant to do. See L<perlfunc/grep> and L<perlfunc/map> for | |
114 | alternatives. | |
eb6e2d6f | 115 | |
6df41af2 | 116 | =item Args must match #! line |
a0d0e21e | 117 | |
6df41af2 GS |
118 | (F) The setuid emulator requires that the arguments Perl was invoked |
119 | with match the arguments specified on the #! line. Since some systems | |
120 | impose a one-argument limit on the #! line, try combining switches; | |
121 | for example, turn C<-w -U> into C<-wU>. | |
a0d0e21e | 122 | |
6df41af2 | 123 | =item Arg too short for msgsnd |
76cd736e | 124 | |
6df41af2 | 125 | (F) msgsnd() requires a string at least as long as sizeof(long). |
76cd736e | 126 | |
8ea97a1e | 127 | =item %s argument is not a HASH or ARRAY element |
a0d0e21e | 128 | |
8ea97a1e | 129 | (F) The argument to exists() must be a hash or array element, such as: |
a0d0e21e LW |
130 | |
131 | $foo{$bar} | |
cb4f522a | 132 | $ref->{"susie"}[12] |
a0d0e21e | 133 | |
8ea97a1e | 134 | =item %s argument is not a HASH or ARRAY element or slice |
5f05dabc | 135 | |
be771a83 GS |
136 | (F) The argument to delete() must be either a hash or array element, |
137 | such as: | |
5f05dabc | 138 | |
139 | $foo{$bar} | |
cb4f522a | 140 | $ref->{"susie"}[12] |
5f05dabc | 141 | |
8ea97a1e | 142 | or a hash or array slice, such as: |
5f05dabc | 143 | |
6df41af2 GS |
144 | @foo[$bar, $baz, $xyzzy] |
145 | @{$ref->[12]}{"susie", "queue"} | |
5315574d | 146 | |
6df41af2 | 147 | =item %s argument is not a subroutine name |
a0d0e21e | 148 | |
6df41af2 | 149 | (F) The argument to exists() for C<exists &sub> must be a subroutine |
be771a83 GS |
150 | name, and not a subroutine call. C<exists &sub()> will generate this |
151 | error. | |
a0d0e21e | 152 | |
f86702cc | 153 | =item Argument "%s" isn't numeric%s |
a0d0e21e | 154 | |
be771a83 GS |
155 | (W numeric) The indicated string was fed as an argument to an operator |
156 | that expected a numeric value instead. If you're fortunate the message | |
157 | will identify which operator was so unfortunate. | |
a0d0e21e LW |
158 | |
159 | =item Array @%s missing the @ in argument %d of %s() | |
160 | ||
75b44862 GS |
161 | (D deprecated) Really old Perl let you omit the @ on array names in some |
162 | spots. This is now heavily deprecated. | |
a0d0e21e LW |
163 | |
164 | =item assertion botched: %s | |
165 | ||
166 | (P) The malloc package that comes with Perl had an internal failure. | |
167 | ||
168 | =item Assertion failed: file "%s" | |
169 | ||
170 | (P) A general assertion failed. The file in question must be examined. | |
171 | ||
172 | =item Assignment to both a list and a scalar | |
173 | ||
174 | (F) If you assign to a conditional operator, the 2nd and 3rd arguments | |
175 | must either both be scalars or both be lists. Otherwise Perl won't | |
176 | know which context to supply to the right side. | |
177 | ||
178 | =item Attempt to free non-arena SV: 0x%lx | |
179 | ||
be771a83 GS |
180 | (P internal) All SV objects are supposed to be allocated from arenas |
181 | that will be garbage collected on exit. An SV was discovered to be | |
182 | outside any of those arenas. | |
a0d0e21e | 183 | |
54310121 | 184 | =item Attempt to free nonexistent shared string |
bbce6d69 | 185 | |
be771a83 GS |
186 | (P internal) Perl maintains a reference counted internal table of |
187 | strings to optimize the storage and access of hash keys and other | |
188 | strings. This indicates someone tried to decrement the reference count | |
189 | of a string that can no longer be found in the table. | |
bbce6d69 | 190 | |
a0d0e21e LW |
191 | =item Attempt to free temp prematurely |
192 | ||
be771a83 GS |
193 | (W debugging) Mortalized values are supposed to be freed by the |
194 | free_tmps() routine. This indicates that something else is freeing the | |
195 | SV before the free_tmps() routine gets a chance, which means that the | |
196 | free_tmps() routine will be freeing an unreferenced scalar when it does | |
197 | try to free it. | |
a0d0e21e LW |
198 | |
199 | =item Attempt to free unreferenced glob pointers | |
200 | ||
e476b1b5 | 201 | (P internal) The reference counts got screwed up on symbol aliases. |
a0d0e21e LW |
202 | |
203 | =item Attempt to free unreferenced scalar | |
204 | ||
be771a83 GS |
205 | (W internal) Perl went to decrement the reference count of a scalar to |
206 | see if it would go to 0, and discovered that it had already gone to 0 | |
207 | earlier, and should have been freed, and in fact, probably was freed. | |
208 | This could indicate that SvREFCNT_dec() was called too many times, or | |
209 | that SvREFCNT_inc() was called too few times, or that the SV was | |
210 | mortalized when it shouldn't have been, or that memory has been | |
211 | corrupted. | |
a0d0e21e | 212 | |
dcdda58d GS |
213 | =item Attempt to join self |
214 | ||
215 | (F) You tried to join a thread from within itself, which is an | |
be771a83 GS |
216 | impossible task. You may be joining the wrong thread, or you may need |
217 | to move the join() to some other thread. | |
dcdda58d | 218 | |
84902520 TB |
219 | =item Attempt to pack pointer to temporary value |
220 | ||
be771a83 GS |
221 | (W pack) You tried to pass a temporary value (like the result of a |
222 | function, or a computed expression) to the "p" pack() template. This | |
223 | means the result contains a pointer to a location that could become | |
224 | invalid anytime, even before the end of the current statement. Use | |
225 | literals or global values as arguments to the "p" pack() template to | |
226 | avoid this warning. | |
84902520 | 227 | |
b7a902f4 | 228 | =item Attempt to use reference as lvalue in substr |
229 | ||
be771a83 GS |
230 | (W substr) You supplied a reference as the first argument to substr() |
231 | used as an lvalue, which is pretty strange. Perhaps you forgot to | |
232 | dereference it first. See L<perlfunc/substr>. | |
b7a902f4 | 233 | |
a0d0e21e LW |
234 | =item Bad arg length for %s, is %d, should be %d |
235 | ||
be771a83 GS |
236 | (F) You passed a buffer of the wrong size to one of msgctl(), semctl() |
237 | or shmctl(). In C parlance, the correct sizes are, respectively, | |
5f05dabc | 238 | S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and |
a0d0e21e LW |
239 | S<sizeof(struct shmid_ds *)>. |
240 | ||
7a95317d GS |
241 | =item Bad evalled substitution pattern |
242 | ||
243 | (F) You've used the /e switch to evaluate the replacement for a | |
244 | substitution, but perl found a syntax error in the code to evaluate, | |
245 | most likely an unexpected right brace '}'. | |
246 | ||
a0d0e21e LW |
247 | =item Bad filehandle: %s |
248 | ||
be771a83 GS |
249 | (F) A symbol was passed to something wanting a filehandle, but the |
250 | symbol has no filehandle associated with it. Perhaps you didn't do an | |
251 | open(), or did it in another package. | |
a0d0e21e LW |
252 | |
253 | =item Bad free() ignored | |
254 | ||
be771a83 GS |
255 | (S malloc) An internal routine called free() on something that had never |
256 | been malloc()ed in the first place. Mandatory, but can be disabled by | |
257 | setting environment variable C<PERL_BADFREE> to 1. | |
33c8a3fe | 258 | |
75b44862 | 259 | This message can be quite often seen with DB_File on systems with "hard" |
be771a83 GS |
260 | dynamic linking, like C<AIX> and C<OS/2>. It is a bug of C<Berkeley DB> |
261 | which is left unnoticed if C<DB> uses I<forgiving> system malloc(). | |
a0d0e21e | 262 | |
aa689395 | 263 | =item Bad hash |
264 | ||
265 | (P) One of the internal hash routines was passed a null HV pointer. | |
266 | ||
f1192cee GA |
267 | =item Bad index while coercing array into hash |
268 | ||
6f54a448 GS |
269 | (F) The index looked up in the hash found as the 0'th element of a |
270 | pseudo-hash is not legal. Index values must be at 1 or greater. | |
271 | See L<perlref>. | |
57079c46 | 272 | |
6df41af2 GS |
273 | =item Badly placed ()'s |
274 | ||
275 | (A) You've accidentally run your script through B<csh> instead | |
276 | of Perl. Check the #! line, or manually feed your script into | |
277 | Perl yourself. | |
278 | ||
a0d0e21e LW |
279 | =item Bad name after %s:: |
280 | ||
be771a83 GS |
281 | (F) You started to name a symbol by using a package prefix, and then |
282 | didn't finish the symbol. In particular, you can't interpolate outside | |
283 | of quotes, so | |
a0d0e21e LW |
284 | |
285 | $var = 'myvar'; | |
286 | $sym = mypack::$var; | |
287 | ||
288 | is not the same as | |
289 | ||
290 | $var = 'myvar'; | |
291 | $sym = "mypack::$var"; | |
292 | ||
4ad56ec9 IZ |
293 | =item Bad realloc() ignored |
294 | ||
be771a83 GS |
295 | (S malloc) An internal routine called realloc() on something that had |
296 | never been malloc()ed in the first place. Mandatory, but can be disabled | |
297 | by setting environment variable C<PERL_BADFREE> to 1. | |
4ad56ec9 | 298 | |
a0d0e21e LW |
299 | =item Bad symbol for array |
300 | ||
301 | (P) An internal request asked to add an array entry to something that | |
302 | wasn't a symbol table entry. | |
303 | ||
304 | =item Bad symbol for filehandle | |
305 | ||
be771a83 GS |
306 | (P) An internal request asked to add a filehandle entry to something |
307 | that wasn't a symbol table entry. | |
a0d0e21e LW |
308 | |
309 | =item Bad symbol for hash | |
310 | ||
311 | (P) An internal request asked to add a hash entry to something that | |
312 | wasn't a symbol table entry. | |
313 | ||
34d09196 GS |
314 | =item Bareword found in conditional |
315 | ||
be771a83 GS |
316 | (W bareword) The compiler found a bareword where it expected a |
317 | conditional, which often indicates that an || or && was parsed as part | |
318 | of the last argument of the previous construct, for example: | |
34d09196 GS |
319 | |
320 | open FOO || die; | |
321 | ||
be771a83 GS |
322 | It may also indicate a misspelled constant that has been interpreted as |
323 | a bareword: | |
34d09196 GS |
324 | |
325 | use constant TYPO => 1; | |
326 | if (TYOP) { print "foo" } | |
327 | ||
328 | The C<strict> pragma is useful in avoiding such errors. | |
329 | ||
6df41af2 GS |
330 | =item Bareword "%s" not allowed while "strict subs" in use |
331 | ||
332 | (F) With "strict subs" in use, a bareword is only allowed as a | |
be771a83 GS |
333 | subroutine identifier, in curly brackets or to the left of the "=>" |
334 | symbol. Perhaps you need to predeclare a subroutine? | |
6df41af2 GS |
335 | |
336 | =item Bareword "%s" refers to nonexistent package | |
337 | ||
be771a83 GS |
338 | (W bareword) You used a qualified bareword of the form C<Foo::>, but the |
339 | compiler saw no other uses of that namespace before that point. Perhaps | |
340 | you need to predeclare a package? | |
6df41af2 | 341 | |
a0d0e21e LW |
342 | =item BEGIN failed--compilation aborted |
343 | ||
be771a83 GS |
344 | (F) An untrapped exception was raised while executing a BEGIN |
345 | subroutine. Compilation stops immediately and the interpreter is | |
346 | exited. | |
a0d0e21e | 347 | |
68dc0745 | 348 | =item BEGIN not safe after errors--compilation aborted |
349 | ||
350 | (F) Perl found a C<BEGIN {}> subroutine (or a C<use> directive, which | |
be771a83 GS |
351 | implies a C<BEGIN {}>) after one or more compilation errors had already |
352 | occurred. Since the intended environment for the C<BEGIN {}> could not | |
353 | be guaranteed (due to the errors), and since subsequent code likely | |
354 | depends on its correct operation, Perl just gave up. | |
68dc0745 | 355 | |
6df41af2 GS |
356 | =item \1 better written as $1 |
357 | ||
be771a83 GS |
358 | (W syntax) Outside of patterns, backreferences live on as variables. |
359 | The use of backslashes is grandfathered on the right-hand side of a | |
360 | substitution, but stylistically it's better to use the variable form | |
361 | because other Perl programmers will expect it, and it works better if | |
362 | there are more than 9 backreferences. | |
6df41af2 | 363 | |
252aa082 JH |
364 | =item Binary number > 0b11111111111111111111111111111111 non-portable |
365 | ||
e476b1b5 | 366 | (W portable) The binary number you specified is larger than 2**32-1 |
9e24b6e2 JH |
367 | (4294967295) and therefore non-portable between systems. See |
368 | L<perlport> for more on portability concerns. | |
252aa082 | 369 | |
69282e91 | 370 | =item bind() on closed socket %s |
a0d0e21e | 371 | |
be771a83 GS |
372 | (W closed) You tried to do a bind on a closed socket. Did you forget to |
373 | check the return value of your socket() call? See L<perlfunc/bind>. | |
a0d0e21e | 374 | |
c5a0f51a JH |
375 | =item Bit vector size > 32 non-portable |
376 | ||
e476b1b5 | 377 | (W portable) Using bit vector sizes larger than 32 is non-portable. |
c5a0f51a | 378 | |
4633a7c4 LW |
379 | =item Bizarre copy of %s in %s |
380 | ||
be771a83 GS |
381 | (P) Perl detected an attempt to copy an internal value that is not |
382 | copiable. | |
4633a7c4 | 383 | |
6df41af2 GS |
384 | =item B<-P> not allowed for setuid/setgid script |
385 | ||
386 | (F) The script would have to be opened by the C preprocessor by name, | |
387 | which provides a race condition that breaks security. | |
388 | ||
f675dbe5 CB |
389 | =item Buffer overflow in prime_env_iter: %s |
390 | ||
be771a83 GS |
391 | (W internal) A warning peculiar to VMS. While Perl was preparing to |
392 | iterate over %ENV, it encountered a logical name or symbol definition | |
393 | which was too long, so it was truncated to the string shown. | |
f675dbe5 | 394 | |
a0d0e21e LW |
395 | =item Callback called exit |
396 | ||
4929bf7b | 397 | (F) A subroutine invoked from an external package via call_sv() |
a0d0e21e LW |
398 | exited by calling exit. |
399 | ||
6df41af2 | 400 | =item %s() called too early to check prototype |
f675dbe5 | 401 | |
be771a83 GS |
402 | (W prototype) You've called a function that has a prototype before the |
403 | parser saw a definition or declaration for it, and Perl could not check | |
404 | that the call conforms to the prototype. You need to either add an | |
405 | early prototype declaration for the subroutine in question, or move the | |
406 | subroutine definition ahead of the call to get proper prototype | |
407 | checking. Alternatively, if you are certain that you're calling the | |
408 | function correctly, you may put an ampersand before the name to avoid | |
409 | the warning. See L<perlsub>. | |
f675dbe5 | 410 | |
6df41af2 | 411 | =item / cannot take a count |
a0d0e21e | 412 | |
be771a83 GS |
413 | (F) You had an unpack template indicating a counted-length string, but |
414 | you have also specified an explicit size for the string. See | |
415 | L<perlfunc/pack>. | |
a0d0e21e LW |
416 | |
417 | =item Can't bless non-reference value | |
418 | ||
419 | (F) Only hard references may be blessed. This is how Perl "enforces" | |
420 | encapsulation of objects. See L<perlobj>. | |
421 | ||
422 | =item Can't break at that line | |
423 | ||
be771a83 GS |
424 | (S internal) A warning intended to only be printed while running within |
425 | the debugger, indicating the line number specified wasn't the location | |
426 | of a statement that could be stopped at. | |
a0d0e21e LW |
427 | |
428 | =item Can't call method "%s" in empty package "%s" | |
429 | ||
430 | (F) You called a method correctly, and it correctly indicated a package | |
431 | functioning as a class, but that package doesn't have ANYTHING defined | |
432 | in it, let alone methods. See L<perlobj>. | |
433 | ||
6df41af2 GS |
434 | =item Can't call method "%s" on an undefined value |
435 | ||
436 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
437 | object reference or package name contains an undefined value. Something |
438 | like this will reproduce the error: | |
6df41af2 GS |
439 | |
440 | $BADREF = undef; | |
441 | process $BADREF 1,2,3; | |
442 | $BADREF->process(1,2,3); | |
443 | ||
a0d0e21e LW |
444 | =item Can't call method "%s" on unblessed reference |
445 | ||
54310121 | 446 | (F) A method call must know in what package it's supposed to run. It |
be771a83 GS |
447 | ordinarily finds this out from the object reference you supply, but you |
448 | didn't supply an object reference in this case. A reference isn't an | |
449 | object reference until it has been blessed. See L<perlobj>. | |
a0d0e21e LW |
450 | |
451 | =item Can't call method "%s" without a package or object reference | |
452 | ||
453 | (F) You used the syntax of a method call, but the slot filled by the | |
be771a83 GS |
454 | object reference or package name contains an expression that returns a |
455 | defined value which is neither an object reference nor a package name. | |
72b5445b GS |
456 | Something like this will reproduce the error: |
457 | ||
458 | $BADREF = 42; | |
459 | process $BADREF 1,2,3; | |
460 | $BADREF->process(1,2,3); | |
461 | ||
a0d0e21e LW |
462 | =item Can't chdir to %s |
463 | ||
464 | (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory | |
465 | that you can chdir to, possibly because it doesn't exist. | |
466 | ||
0545a864 | 467 | =item Can't check filesystem of script "%s" for nosuid |
104d25b7 | 468 | |
be771a83 GS |
469 | (P) For some reason you can't check the filesystem of the script for |
470 | nosuid. | |
104d25b7 | 471 | |
6df41af2 GS |
472 | =item Can't coerce array into hash |
473 | ||
474 | (F) You used an array where a hash was expected, but the array has no | |
475 | information on how to map from keys to array indices. You can do that | |
476 | only with arrays that have a hash reference at index 0. | |
477 | ||
a0d0e21e LW |
478 | =item Can't coerce %s to integer in %s |
479 | ||
480 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 481 | (typeglobs), can't be forced to stop being what they are. So you can't |
a0d0e21e LW |
482 | say things like: |
483 | ||
484 | *foo += 1; | |
485 | ||
486 | You CAN say | |
487 | ||
488 | $foo = *foo; | |
489 | $foo += 1; | |
490 | ||
491 | but then $foo no longer contains a glob. | |
492 | ||
493 | =item Can't coerce %s to number in %s | |
494 | ||
495 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 496 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e LW |
497 | |
498 | =item Can't coerce %s to string in %s | |
499 | ||
500 | (F) Certain types of SVs, in particular real symbol table entries | |
55497cff | 501 | (typeglobs), can't be forced to stop being what they are. |
a0d0e21e LW |
502 | |
503 | =item Can't create pipe mailbox | |
504 | ||
be771a83 GS |
505 | (P) An error peculiar to VMS. The process is suffering from exhausted |
506 | quotas or other plumbing problems. | |
a0d0e21e | 507 | |
eb64745e | 508 | =item Can't declare class for non-scalar %s in "%s" |
a0d0e21e | 509 | |
eb64745e GS |
510 | (S) Currently, only scalar variables can declared with a specific class |
511 | qualifier in a "my" or "our" declaration. The semantics may be extended | |
512 | for other types of variables in future. | |
513 | ||
514 | =item Can't declare %s in "%s" | |
515 | ||
516 | (F) Only scalar, array, and hash variables may be declared as "my" or | |
517 | "our" variables. They must have ordinary identifiers as names. | |
a0d0e21e | 518 | |
6df41af2 GS |
519 | =item Can't do inplace edit: %s is not a regular file |
520 | ||
be771a83 GS |
521 | (S inplace) You tried to use the B<-i> switch on a special file, such as |
522 | a file in /dev, or a FIFO. The file was ignored. | |
6df41af2 | 523 | |
a0d0e21e LW |
524 | =item Can't do inplace edit on %s: %s |
525 | ||
be771a83 GS |
526 | (S inplace) The creation of the new file failed for the indicated |
527 | reason. | |
a0d0e21e | 528 | |
54310121 | 529 | =item Can't do inplace edit without backup |
a0d0e21e | 530 | |
be771a83 GS |
531 | (F) You're on a system such as MS-DOS that gets confused if you try |
532 | reading from a deleted (but still opened) file. You have to say | |
533 | C<-i.bak>, or some such. | |
a0d0e21e | 534 | |
10f9c03d | 535 | =item Can't do inplace edit: %s would not be unique |
a0d0e21e | 536 | |
e476b1b5 | 537 | (S inplace) Your filesystem does not support filenames longer than 14 |
10f9c03d CK |
538 | characters and Perl was unable to create a unique filename during |
539 | inplace editing with the B<-i> switch. The file was ignored. | |
a0d0e21e | 540 | |
6df41af2 | 541 | =item Can't do {n,m} with n > m |
a0d0e21e | 542 | |
6df41af2 GS |
543 | (F) Minima must be less than or equal to maxima. If you really want |
544 | your regexp to match something 0 times, just put {0}. See L<perlre>. | |
a0d0e21e LW |
545 | |
546 | =item Can't do setegid! | |
547 | ||
be771a83 GS |
548 | (P) The setegid() call failed for some reason in the setuid emulator of |
549 | suidperl. | |
a0d0e21e LW |
550 | |
551 | =item Can't do seteuid! | |
552 | ||
553 | (P) The setuid emulator of suidperl failed for some reason. | |
554 | ||
555 | =item Can't do setuid | |
556 | ||
be771a83 GS |
557 | (F) This typically means that ordinary perl tried to exec suidperl to do |
558 | setuid emulation, but couldn't exec it. It looks for a name of the form | |
559 | sperl5.000 in the same directory that the perl executable resides under | |
560 | the name perl5.000, typically /usr/local/bin on Unix machines. If the | |
561 | file is there, check the execute permissions. If it isn't, ask your | |
562 | sysadmin why he and/or she removed it. | |
a0d0e21e LW |
563 | |
564 | =item Can't do waitpid with flags | |
565 | ||
be771a83 GS |
566 | (F) This machine doesn't have either waitpid() or wait4(), so only |
567 | waitpid() without flags is emulated. | |
a0d0e21e | 568 | |
a0d0e21e LW |
569 | =item Can't emulate -%s on #! line |
570 | ||
be771a83 GS |
571 | (F) The #! line specifies a switch that doesn't make sense at this |
572 | point. For example, it'd be kind of silly to put a B<-x> on the #! | |
573 | line. | |
a0d0e21e LW |
574 | |
575 | =item Can't exec "%s": %s | |
576 | ||
be771a83 GS |
577 | (W exec) An system(), exec(), or piped open call could not execute the |
578 | named program for the indicated reason. Typical reasons include: the | |
579 | permissions were wrong on the file, the file wasn't found in | |
580 | C<$ENV{PATH}>, the executable in question was compiled for another | |
581 | architecture, or the #! line in a script points to an interpreter that | |
582 | can't be run for similar reasons. (Or maybe your system doesn't support | |
583 | #! at all.) | |
a0d0e21e LW |
584 | |
585 | =item Can't exec %s | |
586 | ||
be771a83 GS |
587 | (F) Perl was trying to execute the indicated program for you because |
588 | that's what the #! line said. If that's not what you wanted, you may | |
589 | need to mention "perl" on the #! line somewhere. | |
a0d0e21e LW |
590 | |
591 | =item Can't execute %s | |
592 | ||
be771a83 GS |
593 | (F) You used the B<-S> switch, but the copies of the script to execute |
594 | found in the PATH did not have correct permissions. | |
2a92aaa0 | 595 | |
6df41af2 | 596 | =item Can't find an opnumber for "%s" |
2a92aaa0 | 597 | |
be771a83 GS |
598 | (F) A string of a form C<CORE::word> was given to prototype(), but there |
599 | is no builtin with the name C<word>. | |
6df41af2 GS |
600 | |
601 | =item Can't find label %s | |
602 | ||
be771a83 GS |
603 | (F) You said to goto a label that isn't mentioned anywhere that it's |
604 | possible for us to go to. See L<perlfunc/goto>. | |
2a92aaa0 GS |
605 | |
606 | =item Can't find %s on PATH | |
607 | ||
be771a83 GS |
608 | (F) You used the B<-S> switch, but the script to execute could not be |
609 | found in the PATH. | |
a0d0e21e | 610 | |
6df41af2 | 611 | =item Can't find %s on PATH, '.' not in PATH |
a0d0e21e | 612 | |
be771a83 GS |
613 | (F) You used the B<-S> switch, but the script to execute could not be |
614 | found in the PATH, or at least not with the correct permissions. The | |
615 | script exists in the current directory, but PATH prohibits running it. | |
a0d0e21e LW |
616 | |
617 | =item Can't find string terminator %s anywhere before EOF | |
618 | ||
be771a83 GS |
619 | (F) Perl strings can stretch over multiple lines. This message means |
620 | that the closing delimiter was omitted. Because bracketed quotes count | |
621 | nesting levels, the following is missing its final parenthesis: | |
a0d0e21e | 622 | |
fb73857a | 623 | print q(The character '(' starts a side comment.); |
624 | ||
be771a83 GS |
625 | If you're getting this error from a here-document, you may have included |
626 | unseen whitespace before or after your closing tag. A good programmer's | |
627 | editor will have a way to help you find these characters. | |
a0d0e21e LW |
628 | |
629 | =item Can't fork | |
630 | ||
be771a83 GS |
631 | (F) A fatal error occurred while trying to fork while opening a |
632 | pipeline. | |
a0d0e21e | 633 | |
748a9306 LW |
634 | =item Can't get filespec - stale stat buffer? |
635 | ||
be771a83 GS |
636 | (S) A warning peculiar to VMS. This arises because of the difference |
637 | between access checks under VMS and under the Unix model Perl assumes. | |
638 | Under VMS, access checks are done by filename, rather than by bits in | |
639 | the stat buffer, so that ACLs and other protections can be taken into | |
640 | account. Unfortunately, Perl assumes that the stat buffer contains all | |
641 | the necessary information, and passes it, instead of the filespec, to | |
642 | the access checking routine. It will try to retrieve the filespec using | |
643 | the device name and FID present in the stat buffer, but this works only | |
644 | if you haven't made a subsequent call to the CRTL stat() routine, | |
645 | because the device name is overwritten with each call. If this warning | |
646 | appears, the name lookup failed, and the access checking routine gave up | |
647 | and returned FALSE, just to be conservative. (Note: The access checking | |
648 | routine knows about the Perl C<stat> operator and file tests, so you | |
649 | shouldn't ever see this warning in response to a Perl command; it arises | |
650 | only if some internal code takes stat buffers lightly.) | |
748a9306 | 651 | |
a0d0e21e LW |
652 | =item Can't get pipe mailbox device name |
653 | ||
be771a83 GS |
654 | (P) An error peculiar to VMS. After creating a mailbox to act as a |
655 | pipe, Perl can't retrieve its name for later use. | |
a0d0e21e LW |
656 | |
657 | =item Can't get SYSGEN parameter value for MAXBUF | |
658 | ||
748a9306 LW |
659 | (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your |
660 | mailbox buffers to be, and didn't get an answer. | |
a0d0e21e | 661 | |
6df41af2 | 662 | =item Can't "goto" into the middle of a foreach loop |
a0d0e21e | 663 | |
be771a83 GS |
664 | (F) A "goto" statement was executed to jump into the middle of a foreach |
665 | loop. You can't get there from here. See L<perlfunc/goto>. | |
6df41af2 GS |
666 | |
667 | =item Can't "goto" out of a pseudo block | |
668 | ||
be771a83 GS |
669 | (F) A "goto" statement was executed to jump out of what might look like |
670 | a block, except that it isn't a proper block. This usually occurs if | |
671 | you tried to jump out of a sort() block or subroutine, which is a no-no. | |
672 | See L<perlfunc/goto>. | |
a0d0e21e | 673 | |
b150fb22 RH |
674 | =item Can't goto subroutine from an eval-string |
675 | ||
be771a83 GS |
676 | (F) The "goto subroutine" call can't be used to jump out of an eval |
677 | "string". (You can use it to jump out of an eval {BLOCK}, but you | |
678 | probably don't want to.) | |
b150fb22 | 679 | |
6df41af2 GS |
680 | =item Can't goto subroutine outside a subroutine |
681 | ||
be771a83 GS |
682 | (F) The deeply magical "goto subroutine" call can only replace one |
683 | subroutine call for another. It can't manufacture one out of whole | |
684 | cloth. In general you should be calling it out of only an AUTOLOAD | |
685 | routine anyway. See L<perlfunc/goto>. | |
6df41af2 | 686 | |
0b5b802d GS |
687 | =item Can't ignore signal CHLD, forcing to default |
688 | ||
be771a83 GS |
689 | (W signal) Perl has detected that it is being run with the SIGCHLD |
690 | signal (sometimes known as SIGCLD) disabled. Since disabling this | |
691 | signal will interfere with proper determination of exit status of child | |
692 | processes, Perl has reset the signal to its default value. This | |
693 | situation typically indicates that the parent program under which Perl | |
694 | may be running (e.g. cron) is being very careless. | |
0b5b802d | 695 | |
6df41af2 | 696 | =item Can't "last" outside a loop block |
4633a7c4 | 697 | |
6df41af2 | 698 | (F) A "last" statement was executed to break out of the current block, |
be771a83 GS |
699 | except that there's this itty bitty problem called there isn't a current |
700 | block. Note that an "if" or "else" block doesn't count as a "loopish" | |
701 | block, as doesn't a block given to sort(), map() or grep(). You can | |
702 | usually double the curlies to get the same effect though, because the | |
703 | inner curlies will be considered a block that loops once. See | |
704 | L<perlfunc/last>. | |
4633a7c4 | 705 | |
748a9306 LW |
706 | =item Can't localize lexical variable %s |
707 | ||
2ba9eb46 | 708 | (F) You used local on a variable name that was previously declared as a |
748a9306 LW |
709 | lexical variable using "my". This is not allowed. If you want to |
710 | localize a package variable of the same name, qualify it with the | |
711 | package name. | |
712 | ||
0ebe0038 SM |
713 | =item Can't localize pseudo-hash element |
714 | ||
be771a83 GS |
715 | (F) You said something like C<< local $ar->{'key'} >>, where $ar is a |
716 | reference to a pseudo-hash. That hasn't been implemented yet, but you | |
717 | can get a similar effect by localizing the corresponding array element | |
718 | directly -- C<< local $ar->[$ar->[0]{'key'}] >>. | |
0ebe0038 | 719 | |
6df41af2 | 720 | =item Can't localize through a reference |
4727527e | 721 | |
6df41af2 GS |
722 | (F) You said something like C<local $$ref>, which Perl can't currently |
723 | handle, because when it goes to restore the old value of whatever $ref | |
be771a83 GS |
724 | pointed to after the scope of the local() is finished, it can't be sure |
725 | that $ref will still be a reference. | |
4727527e | 726 | |
ec889f3a GS |
727 | =item Can't locate %s |
728 | ||
729 | (F) You said to C<do> (or C<require>, or C<use>) a file that couldn't be | |
730 | found. Perl looks for the file in all the locations mentioned in @INC, | |
be771a83 GS |
731 | unless the file name included the full path to the file. Perhaps you |
732 | need to set the PERL5LIB or PERL5OPT environment variable to say where | |
733 | the extra library is, or maybe the script needs to add the library name | |
734 | to @INC. Or maybe you just misspelled the name of the file. See | |
735 | L<perlfunc/require> and L<lib>. | |
a0d0e21e | 736 | |
6df41af2 GS |
737 | =item Can't locate auto/%s.al in @INC |
738 | ||
be771a83 GS |
739 | (F) A function (or method) was called in a package which allows |
740 | autoload, but there is no function to autoload. Most probable causes | |
741 | are a misprint in a function/method name or a failure to C<AutoSplit> | |
742 | the file, say, by doing C<make install>. | |
6df41af2 | 743 | |
a0d0e21e LW |
744 | =item Can't locate object method "%s" via package "%s" |
745 | ||
746 | (F) You called a method correctly, and it correctly indicated a package | |
747 | functioning as a class, but that package doesn't define that particular | |
2ba9eb46 | 748 | method, nor does any of its base classes. See L<perlobj>. |
a0d0e21e LW |
749 | |
750 | =item Can't locate package %s for @%s::ISA | |
751 | ||
be771a83 GS |
752 | (W syntax) The @ISA array contained the name of another package that |
753 | doesn't seem to exist. | |
a0d0e21e | 754 | |
3e3baf6d TB |
755 | =item Can't make list assignment to \%ENV on this system |
756 | ||
be771a83 GS |
757 | (F) List assignment to %ENV is not supported on some systems, notably |
758 | VMS. | |
3e3baf6d | 759 | |
a0d0e21e LW |
760 | =item Can't modify %s in %s |
761 | ||
be771a83 GS |
762 | (F) You aren't allowed to assign to the item indicated, or otherwise try |
763 | to change it, such as with an auto-increment. | |
a0d0e21e | 764 | |
54310121 | 765 | =item Can't modify nonexistent substring |
a0d0e21e LW |
766 | |
767 | (P) The internal routine that does assignment to a substr() was handed | |
768 | a NULL. | |
769 | ||
6df41af2 GS |
770 | =item Can't modify non-lvalue subroutine call |
771 | ||
772 | (F) Subroutines meant to be used in lvalue context should be declared as | |
773 | such, see L<perlsub/"Lvalue subroutines">. | |
774 | ||
5f05dabc | 775 | =item Can't msgrcv to read-only var |
a0d0e21e | 776 | |
5f05dabc | 777 | (F) The target of a msgrcv must be modifiable to be used as a receive |
a0d0e21e LW |
778 | buffer. |
779 | ||
6df41af2 GS |
780 | =item Can't "next" outside a loop block |
781 | ||
782 | (F) A "next" statement was executed to reiterate the current block, but | |
783 | there isn't a current block. Note that an "if" or "else" block doesn't | |
be771a83 GS |
784 | count as a "loopish" block, as doesn't a block given to sort(), map() or |
785 | grep(). You can usually double the curlies to get the same effect | |
786 | though, because the inner curlies will be considered a block that loops | |
787 | once. See L<perlfunc/next>. | |
6df41af2 | 788 | |
a0d0e21e LW |
789 | =item Can't open %s: %s |
790 | ||
c47ff5f1 | 791 | (S inplace) The implicit opening of a file through use of the C<< <> >> |
08e9d68e DD |
792 | filehandle, either implicitly under the C<-n> or C<-p> command-line |
793 | switches, or explicitly, failed for the indicated reason. Usually this | |
be771a83 GS |
794 | is because you don't have read permission for a file which you named on |
795 | the command line. | |
a0d0e21e LW |
796 | |
797 | =item Can't open bidirectional pipe | |
798 | ||
be771a83 GS |
799 | (W pipe) You tried to say C<open(CMD, "|cmd|")>, which is not supported. |
800 | You can try any of several modules in the Perl library to do this, such | |
801 | as IPC::Open2. Alternately, direct the pipe's output to a file using | |
802 | ">", and then read it in under a different file handle. | |
a0d0e21e | 803 | |
748a9306 LW |
804 | =item Can't open error file %s as stderr |
805 | ||
be771a83 GS |
806 | (F) An error peculiar to VMS. Perl does its own command line |
807 | redirection, and couldn't open the file specified after '2>' or '2>>' on | |
808 | the command line for writing. | |
748a9306 LW |
809 | |
810 | =item Can't open input file %s as stdin | |
811 | ||
be771a83 GS |
812 | (F) An error peculiar to VMS. Perl does its own command line |
813 | redirection, and couldn't open the file specified after '<' on the | |
814 | command line for reading. | |
748a9306 LW |
815 | |
816 | =item Can't open output file %s as stdout | |
817 | ||
be771a83 GS |
818 | (F) An error peculiar to VMS. Perl does its own command line |
819 | redirection, and couldn't open the file specified after '>' or '>>' on | |
820 | the command line for writing. | |
748a9306 LW |
821 | |
822 | =item Can't open output pipe (name: %s) | |
823 | ||
be771a83 GS |
824 | (P) An error peculiar to VMS. Perl does its own command line |
825 | redirection, and couldn't open the pipe into which to send data destined | |
826 | for stdout. | |
748a9306 | 827 | |
a0d0e21e LW |
828 | =item Can't open perl script "%s": %s |
829 | ||
830 | (F) The script you specified can't be opened for the indicated reason. | |
831 | ||
6df41af2 GS |
832 | =item Can't read CRTL environ |
833 | ||
834 | (S) A warning peculiar to VMS. Perl tried to read an element of %ENV | |
835 | from the CRTL's internal environment array and discovered the array was | |
836 | missing. You need to figure out where your CRTL misplaced its environ | |
be771a83 GS |
837 | or define F<PERL_ENV_TABLES> (see L<perlvms>) so that environ is not |
838 | searched. | |
6df41af2 | 839 | |
7bac28a0 | 840 | =item Can't redefine active sort subroutine %s |
841 | ||
842 | (F) Perl optimizes the internal handling of sort subroutines and keeps | |
be771a83 GS |
843 | pointers into them. You tried to redefine one such sort subroutine when |
844 | it was currently active, which is not allowed. If you really want to do | |
7bac28a0 | 845 | this, you should write C<sort { &func } @x> instead of C<sort func @x>. |
846 | ||
6df41af2 GS |
847 | =item Can't "redo" outside a loop block |
848 | ||
849 | (F) A "redo" statement was executed to restart the current block, but | |
850 | there isn't a current block. Note that an "if" or "else" block doesn't | |
851 | count as a "loopish" block, as doesn't a block given to sort(), map() | |
852 | or grep(). You can usually double the curlies to get the same effect | |
853 | though, because the inner curlies will be considered a block that | |
854 | loops once. See L<perlfunc/redo>. | |
855 | ||
10f9c03d CK |
856 | =item Can't remove %s: %s, skipping file |
857 | ||
be771a83 GS |
858 | (S inplace) You requested an inplace edit without creating a backup |
859 | file. Perl was unable to remove the original file to replace it with | |
860 | the modified file. The file was left unmodified. | |
10f9c03d | 861 | |
a0d0e21e LW |
862 | =item Can't rename %s to %s: %s, skipping file |
863 | ||
e476b1b5 | 864 | (S inplace) The rename done by the B<-i> switch failed for some reason, |
10f9c03d | 865 | probably because you don't have write permission to the directory. |
a0d0e21e | 866 | |
748a9306 LW |
867 | =item Can't reopen input pipe (name: %s) in binary mode |
868 | ||
be771a83 GS |
869 | (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried |
870 | to reopen it to accept binary data. Alas, it failed. | |
748a9306 | 871 | |
6df41af2 GS |
872 | =item Can't resolve method `%s' overloading `%s' in package `%s' |
873 | ||
be771a83 GS |
874 | (F|P) Error resolving overloading specified by a method name (as opposed |
875 | to a subroutine reference): no such method callable via the package. If | |
876 | method name is C<???>, this is an internal error. | |
6df41af2 | 877 | |
a0d0e21e LW |
878 | =item Can't reswap uid and euid |
879 | ||
be771a83 GS |
880 | (P) The setreuid() call failed for some reason in the setuid emulator of |
881 | suidperl. | |
a0d0e21e | 882 | |
cd06dffe GS |
883 | =item Can't return %s from lvalue subroutine |
884 | ||
be771a83 GS |
885 | (F) Perl detected an attempt to return illegal lvalues (such as |
886 | temporary or readonly values) from a subroutine used as an lvalue. This | |
887 | is not allowed. | |
cd06dffe | 888 | |
6df41af2 GS |
889 | =item Can't return outside a subroutine |
890 | ||
891 | (F) The return statement was executed in mainline code, that is, where | |
892 | there was no subroutine call to return out of. See L<perlsub>. | |
893 | ||
a0d0e21e LW |
894 | =item Can't stat script "%s" |
895 | ||
be771a83 GS |
896 | (P) For some reason you can't fstat() the script even though you have it |
897 | open already. Bizarre. | |
a0d0e21e LW |
898 | |
899 | =item Can't swap uid and euid | |
900 | ||
be771a83 GS |
901 | (P) The setreuid() call failed for some reason in the setuid emulator of |
902 | suidperl. | |
a0d0e21e LW |
903 | |
904 | =item Can't take log of %g | |
905 | ||
fb73857a | 906 | (F) For ordinary real numbers, you can't take the logarithm of a |
907 | negative number or zero. There's a Math::Complex package that comes | |
be771a83 GS |
908 | standard with Perl, though, if you really want to do that for the |
909 | negative numbers. | |
a0d0e21e LW |
910 | |
911 | =item Can't take sqrt of %g | |
912 | ||
913 | (F) For ordinary real numbers, you can't take the square root of a | |
fb73857a | 914 | negative number. There's a Math::Complex package that comes standard |
915 | with Perl, though, if you really want to do that. | |
a0d0e21e LW |
916 | |
917 | =item Can't undef active subroutine | |
918 | ||
919 | (F) You can't undefine a routine that's currently running. You can, | |
920 | however, redefine it while it's running, and you can even undef the | |
921 | redefined subroutine while the old routine is running. Go figure. | |
922 | ||
923 | =item Can't unshift | |
924 | ||
925 | (F) You tried to unshift an "unreal" array that can't be unshifted, such | |
926 | as the main Perl stack. | |
927 | ||
928 | =item Can't upgrade that kind of scalar | |
929 | ||
be771a83 GS |
930 | (P) The internal sv_upgrade routine adds "members" to an SV, making it |
931 | into a more specialized kind of SV. The top several SV types are so | |
932 | specialized, however, that they cannot be interconverted. This message | |
933 | indicates that such a conversion was attempted. | |
a0d0e21e LW |
934 | |
935 | =item Can't upgrade to undef | |
936 | ||
be771a83 GS |
937 | (P) The undefined SV is the bottom of the totem pole, in the scheme of |
938 | upgradability. Upgrading to undef indicates an error in the code | |
939 | calling sv_upgrade. | |
a0d0e21e | 940 | |
6df41af2 GS |
941 | =item Can't use an undefined value as %s reference |
942 | ||
943 | (F) A value used as either a hard reference or a symbolic reference must | |
944 | be a defined value. This helps to delurk some insidious errors. | |
945 | ||
946 | =item Can't use bareword ("%s") as %s ref while "strict refs" in use | |
947 | ||
be771a83 GS |
948 | (F) Only hard references are allowed by "strict refs". Symbolic |
949 | references are disallowed. See L<perlref>. | |
6df41af2 | 950 | |
1d2dff63 GS |
951 | =item Can't use %%! because Errno.pm is not available |
952 | ||
953 | (F) The first time the %! hash is used, perl automatically loads the | |
954 | Errno.pm module. The Errno module is expected to tie the %! hash to | |
955 | provide symbolic names for C<$!> errno values. | |
956 | ||
6df41af2 GS |
957 | =item Can't use %s for loop variable |
958 | ||
be771a83 GS |
959 | (F) Only a simple scalar variable may be used as a loop variable on a |
960 | foreach. | |
6df41af2 GS |
961 | |
962 | =item Can't use global %s in "my" | |
963 | ||
be771a83 GS |
964 | (F) You tried to declare a magical variable as a lexical variable. This |
965 | is not allowed, because the magic can be tied to only one location | |
966 | (namely the global variable) and it would be incredibly confusing to | |
967 | have variables in your program that looked like magical variables but | |
6df41af2 GS |
968 | weren't. |
969 | ||
c07a80fd | 970 | =item Can't use "my %s" in sort comparison |
971 | ||
972 | (F) The global variables $a and $b are reserved for sort comparisons. | |
c47ff5f1 | 973 | You mentioned $a or $b in the same line as the <=> or cmp operator, |
c07a80fd | 974 | and the variable had earlier been declared as a lexical variable. |
975 | Either qualify the sort variable with the package name, or rename the | |
976 | lexical variable. | |
977 | ||
a0d0e21e LW |
978 | =item Can't use %s ref as %s ref |
979 | ||
980 | (F) You've mixed up your reference types. You have to dereference a | |
981 | reference of the type needed. You can use the ref() function to | |
982 | test the type of the reference, if need be. | |
983 | ||
748a9306 | 984 | =item Can't use string ("%s") as %s ref while "strict refs" in use |
a0d0e21e | 985 | |
be771a83 GS |
986 | (F) Only hard references are allowed by "strict refs". Symbolic |
987 | references are disallowed. See L<perlref>. | |
a0d0e21e | 988 | |
748a9306 LW |
989 | =item Can't use subscript on %s |
990 | ||
991 | (F) The compiler tried to interpret a bracketed expression as a | |
992 | subscript. But to the left of the brackets was an expression that | |
993 | didn't look like an array reference, or anything else subscriptable. | |
994 | ||
6df41af2 GS |
995 | =item Can't use \%c to mean $%c in expression |
996 | ||
75b44862 GS |
997 | (W syntax) In an ordinary expression, backslash is a unary operator that |
998 | creates a reference to its argument. The use of backslash to indicate a | |
999 | backreference to a matched substring is valid only as part of a regular | |
be771a83 GS |
1000 | expression pattern. Trying to do this in ordinary Perl code produces a |
1001 | value that prints out looking like SCALAR(0xdecaf). Use the $1 form | |
1002 | instead. | |
6df41af2 | 1003 | |
810b8aa5 GS |
1004 | =item Can't weaken a nonreference |
1005 | ||
1006 | (F) You attempted to weaken something that was not a reference. Only | |
1007 | references can be weakened. | |
1008 | ||
5f05dabc | 1009 | =item Can't x= to read-only value |
a0d0e21e | 1010 | |
be771a83 GS |
1011 | (F) You tried to repeat a constant value (often the undefined value) |
1012 | with an assignment operator, which implies modifying the value itself. | |
a0d0e21e LW |
1013 | Perhaps you need to copy the value to a temporary, and repeat that. |
1014 | ||
b8c5462f JH |
1015 | =item Character class syntax [%s] belongs inside character classes |
1016 | ||
e476b1b5 | 1017 | (W unsafe) The character class constructs [: :], [= =], and [. .] go |
be771a83 GS |
1018 | I<inside> character classes, the [] are part of the construct, for |
1019 | example: /[012[:alpha:]345]/. Note that [= =] and [. .] are not | |
1020 | currently implemented; they are simply placeholders for future | |
1021 | extensions. | |
b8c5462f | 1022 | |
644a2880 | 1023 | =item Character class syntax [. .] is reserved for future extensions |
4599a1de | 1024 | |
75b44862 | 1025 | (W regexp) Within regular expression character classes ([]) the syntax |
be771a83 GS |
1026 | beginning with "[." and ending with ".]" is reserved for future |
1027 | extensions. If you need to represent those character sequences inside a | |
1028 | regular expression character class, just quote the square brackets with | |
1029 | the backslash: "\[." and ".\]". | |
4599a1de JH |
1030 | |
1031 | =item Character class syntax [= =] is reserved for future extensions | |
1032 | ||
e476b1b5 | 1033 | (W regexp) Within regular expression character classes ([]) the syntax |
be771a83 GS |
1034 | beginning with "[=" and ending with "=]" is reserved for future |
1035 | extensions. If you need to represent those character sequences inside a | |
1036 | regular expression character class, just quote the square brackets with | |
1037 | the backslash: "\[=" and "=\]". | |
4599a1de | 1038 | |
6df41af2 GS |
1039 | =item Character class [:%s:] unknown |
1040 | ||
be771a83 GS |
1041 | (F) The class in the character class [: :] syntax is unknown. See |
1042 | L<perlre>. | |
6df41af2 | 1043 | |
5a211162 | 1044 | =item chmod() mode argument is missing initial 0 |
a0d0e21e | 1045 | |
e476b1b5 | 1046 | (W chmod) A novice will sometimes say |
a0d0e21e LW |
1047 | |
1048 | chmod 777, $filename | |
1049 | ||
be771a83 GS |
1050 | not realizing that 777 will be interpreted as a decimal number, |
1051 | equivalent to 01411. Octal constants are introduced with a leading 0 in | |
1052 | Perl, as in C. | |
a0d0e21e | 1053 | |
c47ff5f1 | 1054 | =item Close on unopened file <%s> |
a0d0e21e | 1055 | |
e476b1b5 | 1056 | (W unopened) You tried to close a filehandle that was never opened. |
a0d0e21e | 1057 | |
6df41af2 GS |
1058 | =item %s: Command not found |
1059 | ||
be771a83 GS |
1060 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1061 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 1062 | |
7a2e2cd6 | 1063 | =item Compilation failed in require |
1064 | ||
1065 | (F) Perl could not compile a file specified in a C<require> statement. | |
be771a83 GS |
1066 | Perl uses this generic message when none of the errors that it |
1067 | encountered were severe enough to halt compilation immediately. | |
7a2e2cd6 | 1068 | |
c3464db5 DD |
1069 | =item Complex regular subexpression recursion limit (%d) exceeded |
1070 | ||
be771a83 GS |
1071 | (W regexp) The regular expression engine uses recursion in complex |
1072 | situations where back-tracking is required. Recursion depth is limited | |
1073 | to 32766, or perhaps less in architectures where the stack cannot grow | |
1074 | arbitrarily. ("Simple" and "medium" situations are handled without | |
1075 | recursion and are not subject to a limit.) Try shortening the string | |
1076 | under examination; looping in Perl code (e.g. with C<while>) rather than | |
1077 | in the regular expression engine; or rewriting the regular expression so | |
1078 | that it is simpler or backtracks less. (See L<perlbook> for information | |
1079 | on I<Mastering Regular Expressions>.) | |
c3464db5 | 1080 | |
69282e91 | 1081 | =item connect() on closed socket %s |
a0d0e21e | 1082 | |
be771a83 GS |
1083 | (W closed) You tried to do a connect on a closed socket. Did you forget |
1084 | to check the return value of your socket() call? See | |
1085 | L<perlfunc/connect>. | |
a0d0e21e | 1086 | |
6df41af2 GS |
1087 | =item constant(%s): %s |
1088 | ||
be771a83 GS |
1089 | (F) The parser found inconsistencies either while attempting to define |
1090 | an overloaded constant, or when trying to find the character name | |
1091 | specified in the C<\N{...}> escape. Perhaps you forgot to load the | |
1092 | corresponding C<overload> or C<charnames> pragma? See L<charnames> and | |
1093 | L<overload>. | |
6df41af2 | 1094 | |
779c5bc9 GS |
1095 | =item Constant is not %s reference |
1096 | ||
1097 | (F) A constant value (perhaps declared using the C<use constant> pragma) | |
be771a83 GS |
1098 | is being dereferenced, but it amounts to the wrong type of reference. |
1099 | The message indicates the type of reference that was expected. This | |
1100 | usually indicates a syntax error in dereferencing the constant value. | |
779c5bc9 GS |
1101 | See L<perlsub/"Constant Functions"> and L<constant>. |
1102 | ||
4cee8e80 CS |
1103 | =item Constant subroutine %s redefined |
1104 | ||
be771a83 GS |
1105 | (S|W redefine) You redefined a subroutine which had previously been |
1106 | eligible for inlining. See L<perlsub/"Constant Functions"> for | |
1107 | commentary and workarounds. | |
4cee8e80 | 1108 | |
9607fc9c | 1109 | =item Constant subroutine %s undefined |
1110 | ||
be771a83 GS |
1111 | (W misc) You undefined a subroutine which had previously been eligible |
1112 | for inlining. See L<perlsub/"Constant Functions"> for commentary and | |
1113 | workarounds. | |
9607fc9c | 1114 | |
e7ea3e70 IZ |
1115 | =item Copy method did not return a reference |
1116 | ||
be771a83 GS |
1117 | (F) The method which overloads "=" is buggy. See L<overload/Copy |
1118 | Constructor>. | |
e7ea3e70 | 1119 | |
6798c92b GS |
1120 | =item CORE::%s is not a keyword |
1121 | ||
1122 | (F) The CORE:: namespace is reserved for Perl keywords. | |
1123 | ||
a0d0e21e LW |
1124 | =item corrupted regexp pointers |
1125 | ||
1126 | (P) The regular expression engine got confused by what the regular | |
1127 | expression compiler gave it. | |
1128 | ||
1129 | =item corrupted regexp program | |
1130 | ||
be771a83 GS |
1131 | (P) The regular expression engine got passed a regexp program without a |
1132 | valid magic number. | |
a0d0e21e | 1133 | |
6df41af2 GS |
1134 | =item Corrupt malloc ptr 0x%lx at 0x%lx |
1135 | ||
1136 | (P) The malloc package that comes with Perl had an internal failure. | |
1137 | ||
1138 | =item C<-p> destination: %s | |
1139 | ||
1140 | (F) An error occurred during the implicit output invoked by the C<-p> | |
1141 | command-line switch. (This output goes to STDOUT unless you've | |
1142 | redirected it with select().) | |
1143 | ||
1144 | =item C<-T> and C<-B> not implemented on filehandles | |
1145 | ||
1146 | (F) Perl can't peek at the stdio buffer of filehandles when it doesn't | |
1147 | know about your kind of stdio. You'll have to use a filename instead. | |
1148 | ||
a0d0e21e LW |
1149 | =item Deep recursion on subroutine "%s" |
1150 | ||
be771a83 GS |
1151 | (W recursion) This subroutine has called itself (directly or indirectly) |
1152 | 100 times more than it has returned. This probably indicates an | |
1153 | infinite recursion, unless you're writing strange benchmark programs, in | |
1154 | which case it indicates something else. | |
a0d0e21e | 1155 | |
f10b0346 | 1156 | =item defined(@array) is deprecated |
69794302 | 1157 | |
be771a83 GS |
1158 | (D deprecated) defined() is not usually useful on arrays because it |
1159 | checks for an undefined I<scalar> value. If you want to see if the | |
1160 | array is empty, just use C<if (@array) { # not empty }> for example. | |
69794302 | 1161 | |
f10b0346 | 1162 | =item defined(%hash) is deprecated |
69794302 | 1163 | |
be771a83 GS |
1164 | (D deprecated) defined() is not usually useful on hashes because it |
1165 | checks for an undefined I<scalar> value. If you want to see if the hash | |
1166 | is empty, just use C<if (%hash) { # not empty }> for example. | |
69794302 | 1167 | |
fc36a67e | 1168 | =item Delimiter for here document is too long |
1169 | ||
be771a83 GS |
1170 | (F) In a here document construct like C<<<FOO>, the label C<FOO> is too |
1171 | long for Perl to handle. You have to be seriously twisted to write code | |
1172 | that triggers this error. | |
fc36a67e | 1173 | |
3cdd684c TP |
1174 | =item Did not produce a valid header |
1175 | ||
1176 | See Server error. | |
1177 | ||
6df41af2 GS |
1178 | =item %s did not return a true value |
1179 | ||
1180 | (F) A required (or used) file must return a true value to indicate that | |
1181 | it compiled correctly and ran its initialization code correctly. It's | |
1182 | traditional to end such a file with a "1;", though any true value would | |
1183 | do. See L<perlfunc/require>. | |
1184 | ||
cc507455 | 1185 | =item (Did you mean &%s instead?) |
4633a7c4 | 1186 | |
be771a83 GS |
1187 | (W) You probably referred to an imported subroutine &FOO as $FOO or some |
1188 | such. | |
4633a7c4 | 1189 | |
cc507455 | 1190 | =item (Did you mean "local" instead of "our"?) |
33633739 | 1191 | |
be771a83 GS |
1192 | (W misc) Remember that "our" does not localize the declared global |
1193 | variable. You have declared it again in the same lexical scope, which | |
1194 | seems superfluous. | |
33633739 | 1195 | |
cc507455 | 1196 | =item (Did you mean $ or @ instead of %?) |
a0d0e21e | 1197 | |
be771a83 GS |
1198 | (W) You probably said %hash{$key} when you meant $hash{$key} or |
1199 | @hash{@keys}. On the other hand, maybe you just meant %hash and got | |
1200 | carried away. | |
748a9306 | 1201 | |
7e1af8bc | 1202 | =item Died |
5f05dabc | 1203 | |
1204 | (F) You passed die() an empty string (the equivalent of C<die "">) or | |
1205 | you called it with no args and both C<$@> and C<$_> were empty. | |
1206 | ||
3cdd684c TP |
1207 | =item Document contains no data |
1208 | ||
1209 | See Server error. | |
1210 | ||
a0d0e21e LW |
1211 | =item Don't know how to handle magic of type '%s' |
1212 | ||
1213 | (P) The internal handling of magical variables has been cursed. | |
1214 | ||
1215 | =item do_study: out of memory | |
1216 | ||
1217 | (P) This should have been caught by safemalloc() instead. | |
1218 | ||
6df41af2 GS |
1219 | =item (Do you need to predeclare %s?) |
1220 | ||
1221 | (S) This is an educated guess made in conjunction with the message "%s | |
1222 | found where operator expected". It often means a subroutine or module | |
1223 | name is being referenced that hasn't been declared yet. This may be | |
1224 | because of ordering problems in your file, or because of a missing | |
be771a83 GS |
1225 | "sub", "package", "require", or "use" statement. If you're referencing |
1226 | something that isn't defined yet, you don't actually have to define the | |
1227 | subroutine or package before the current location. You can use an empty | |
1228 | "sub foo;" or "package FOO;" to enter a "forward" declaration. | |
6df41af2 | 1229 | |
a0d0e21e LW |
1230 | =item Duplicate free() ignored |
1231 | ||
be771a83 GS |
1232 | (S malloc) An internal routine called free() on something that had |
1233 | already been freed. | |
a0d0e21e | 1234 | |
4633a7c4 LW |
1235 | =item elseif should be elsif |
1236 | ||
be771a83 GS |
1237 | (S) There is no keyword "elseif" in Perl because Larry thinks it's ugly. |
1238 | Your code will be interpreted as an attempt to call a method named | |
1239 | "elseif" for the class returned by the following block. This is | |
4633a7c4 LW |
1240 | unlikely to be what you want. |
1241 | ||
85ab1d1d | 1242 | =item entering effective %s failed |
5ff3f7a4 | 1243 | |
85ab1d1d | 1244 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
1245 | effective uids or gids failed. |
1246 | ||
748a9306 LW |
1247 | =item Error converting file specification %s |
1248 | ||
5f05dabc | 1249 | (F) An error peculiar to VMS. Because Perl may have to deal with file |
748a9306 | 1250 | specifications in either VMS or Unix syntax, it converts them to a |
be771a83 GS |
1251 | single form when it must operate on them directly. Either you've passed |
1252 | an invalid file specification to Perl, or you've found a case the | |
1253 | conversion routines don't handle. Drat. | |
748a9306 | 1254 | |
e4d48cc9 GS |
1255 | =item %s: Eval-group in insecure regular expression |
1256 | ||
be771a83 GS |
1257 | (F) Perl detected tainted data when trying to compile a regular |
1258 | expression that contains the C<(?{ ... })> zero-width assertion, which | |
1259 | is unsafe. See L<perlre/(?{ code })>, and L<perlsec>. | |
e4d48cc9 | 1260 | |
e4d48cc9 GS |
1261 | =item %s: Eval-group not allowed at run time |
1262 | ||
be771a83 GS |
1263 | (F) Perl tried to compile a regular expression containing the |
1264 | C<(?{ ... })> zero-width assertion at run time, as it would when the | |
1265 | pattern contains interpolated values. Since that is a security risk, it | |
1266 | is not allowed. If you insist, you may still do this by explicitly | |
1267 | building the pattern from an interpolated string at run time and using | |
1268 | that in an eval(). See L<perlre/(?{ code })>. | |
e4d48cc9 | 1269 | |
6df41af2 GS |
1270 | =item %s: Eval-group not allowed, use re 'eval' |
1271 | ||
be771a83 GS |
1272 | (F) A regular expression contained the C<(?{ ... })> zero-width |
1273 | assertion, but that construct is only allowed when the C<use re 'eval'> | |
1274 | pragma is in effect. See L<perlre/(?{ code })>. | |
6df41af2 | 1275 | |
fc36a67e | 1276 | =item Excessively long <> operator |
1277 | ||
1278 | (F) The contents of a <> operator may not exceed the maximum size of a | |
1279 | Perl identifier. If you're just trying to glob a long list of | |
1280 | filenames, try using the glob() operator, or put the filenames into a | |
1281 | variable and glob that. | |
1282 | ||
f86702cc | 1283 | =item Execution of %s aborted due to compilation errors |
a0d0e21e LW |
1284 | |
1285 | (F) The final summary message when a Perl compilation fails. | |
1286 | ||
1287 | =item Exiting eval via %s | |
1288 | ||
be771a83 GS |
1289 | (W exiting) You are exiting an eval by unconventional means, such as a |
1290 | goto, or a loop control statement. | |
e476b1b5 GS |
1291 | |
1292 | =item Exiting format via %s | |
1293 | ||
be771a83 GS |
1294 | (W exiting) You are exiting an eval by unconventional means, such as a |
1295 | goto, or a loop control statement. | |
a0d0e21e | 1296 | |
0a753a76 | 1297 | =item Exiting pseudo-block via %s |
1298 | ||
be771a83 GS |
1299 | (W exiting) You are exiting a rather special block construct (like a |
1300 | sort block or subroutine) by unconventional means, such as a goto, or a | |
1301 | loop control statement. See L<perlfunc/sort>. | |
0a753a76 | 1302 | |
a0d0e21e LW |
1303 | =item Exiting subroutine via %s |
1304 | ||
be771a83 GS |
1305 | (W exiting) You are exiting a subroutine by unconventional means, such |
1306 | as a goto, or a loop control statement. | |
a0d0e21e LW |
1307 | |
1308 | =item Exiting substitution via %s | |
1309 | ||
be771a83 GS |
1310 | (W exiting) You are exiting a substitution by unconventional means, such |
1311 | as a return, a goto, or a loop control statement. | |
a0d0e21e | 1312 | |
7b8d334a GS |
1313 | =item Explicit blessing to '' (assuming package main) |
1314 | ||
be771a83 GS |
1315 | (W misc) You are blessing a reference to a zero length string. This has |
1316 | the effect of blessing the reference into the package main. This is | |
1317 | usually not what you want. Consider providing a default target package, | |
1318 | e.g. bless($ref, $p || 'MyPackage'); | |
7b8d334a | 1319 | |
6df41af2 GS |
1320 | =item %s: Expression syntax |
1321 | ||
be771a83 GS |
1322 | (A) You've accidentally run your script through B<csh> instead of Perl. |
1323 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 GS |
1324 | |
1325 | =item %s failed--call queue aborted | |
1326 | ||
1327 | (F) An untrapped exception was raised while executing a CHECK, INIT, or | |
1328 | END subroutine. Processing of the remainder of the queue of such | |
1329 | routines has been prematurely ended. | |
1330 | ||
73b437c8 JH |
1331 | =item false [] range "%s" in regexp |
1332 | ||
be771a83 GS |
1333 | (W regexp) A character class range must start and end at a literal |
1334 | character, not another character class like C<\d> or C<[:alpha:]>. The | |
1335 | "-" in your false range is interpreted as a literal "-". Consider | |
1336 | quoting the "-", "\-". See L<perlre>. | |
73b437c8 | 1337 | |
748a9306 | 1338 | =item Fatal VMS error at %s, line %d |
a0d0e21e | 1339 | |
be771a83 GS |
1340 | (P) An error peculiar to VMS. Something untoward happened in a VMS |
1341 | system service or RTL routine; Perl's exit status should provide more | |
1342 | details. The filename in "at %s" and the line number in "line %d" tell | |
1343 | you which section of the Perl source code is distressed. | |
a0d0e21e LW |
1344 | |
1345 | =item fcntl is not implemented | |
1346 | ||
1347 | (F) Your machine apparently doesn't implement fcntl(). What is this, a | |
1348 | PDP-11 or something? | |
1349 | ||
1350 | =item Filehandle %s never opened | |
1351 | ||
be771a83 GS |
1352 | (W unopened) An I/O operation was attempted on a filehandle that was |
1353 | never initialized. You need to do an open() or a socket() call, or call | |
1354 | a constructor from the FileHandle package. | |
a0d0e21e | 1355 | |
af8c498a | 1356 | =item Filehandle %s opened only for input |
a0d0e21e | 1357 | |
be771a83 GS |
1358 | (W io) You tried to write on a read-only filehandle. If you intended it |
1359 | to be a read-write filehandle, you needed to open it with "+<" or "+>" | |
1360 | or "+>>" instead of with "<" or nothing. If you intended only to write | |
1361 | the file, use ">" or ">>". See L<perlfunc/open>. | |
a0d0e21e | 1362 | |
af8c498a | 1363 | =item Filehandle %s opened only for output |
a0d0e21e | 1364 | |
be771a83 GS |
1365 | (W io) You tried to read from a filehandle opened only for writing. If |
1366 | you intended it to be a read/write filehandle, you needed to open it | |
1367 | with "+<" or "+>" or "+>>" instead of with "<" or nothing. If you | |
1368 | intended only to read from the file, use "<". See L<perlfunc/open>. | |
a0d0e21e LW |
1369 | |
1370 | =item Final $ should be \$ or $name | |
1371 | ||
1372 | (F) You must now decide whether the final $ in a string was meant to be | |
be771a83 GS |
1373 | a literal dollar sign, or was meant to introduce a variable name that |
1374 | happens to be missing. So you have to put either the backslash or the | |
1375 | name. | |
a0d0e21e LW |
1376 | |
1377 | =item Final @ should be \@ or @name | |
1378 | ||
1379 | (F) You must now decide whether the final @ in a string was meant to be | |
be771a83 GS |
1380 | a literal "at" sign, or was meant to introduce a variable name that |
1381 | happens to be missing. So you have to put either the backslash or the | |
1382 | name. | |
a0d0e21e | 1383 | |
56e90b21 GS |
1384 | =item flock() on closed filehandle %s |
1385 | ||
be771a83 GS |
1386 | (W closed) The filehandle you're attempting to flock() got itself closed |
1387 | some time before now. Check your logic flow. flock() operates on | |
1388 | filehandles. Are you attempting to call flock() on a dirhandle by the | |
1389 | same name? | |
56e90b21 | 1390 | |
6df41af2 GS |
1391 | =item ?+* follows nothing in regexp |
1392 | ||
be771a83 GS |
1393 | (F) You started a regular expression with a quantifier. Backslash it if |
1394 | you meant it literally. See L<perlre>. | |
6df41af2 GS |
1395 | |
1396 | =item Format not terminated | |
1397 | ||
1398 | (F) A format must be terminated by a line with a solitary dot. Perl got | |
1399 | to the end of your file without finding such a line. | |
1400 | ||
a0d0e21e LW |
1401 | =item Format %s redefined |
1402 | ||
e476b1b5 | 1403 | (W redefine) You redefined a format. To suppress this warning, say |
a0d0e21e LW |
1404 | |
1405 | { | |
4438c4b7 | 1406 | no warnings; |
a0d0e21e LW |
1407 | eval "format NAME =..."; |
1408 | } | |
1409 | ||
a0d0e21e LW |
1410 | =item Found = in conditional, should be == |
1411 | ||
e476b1b5 | 1412 | (W syntax) You said |
a0d0e21e LW |
1413 | |
1414 | if ($foo = 123) | |
1415 | ||
1416 | when you meant | |
1417 | ||
1418 | if ($foo == 123) | |
1419 | ||
1420 | (or something like that). | |
1421 | ||
6df41af2 GS |
1422 | =item %s found where operator expected |
1423 | ||
1424 | (S) The Perl lexer knows whether to expect a term or an operator. If it | |
be771a83 GS |
1425 | sees what it knows to be a term when it was expecting to see an |
1426 | operator, it gives you this warning. Usually it indicates that an | |
1427 | operator or delimiter was omitted, such as a semicolon. | |
6df41af2 | 1428 | |
a0d0e21e LW |
1429 | =item gdbm store returned %d, errno %d, key "%s" |
1430 | ||
1431 | (S) A warning from the GDBM_File extension that a store failed. | |
1432 | ||
1433 | =item gethostent not implemented | |
1434 | ||
1435 | (F) Your C library apparently doesn't implement gethostent(), probably | |
1436 | because if it did, it'd feel morally obligated to return every hostname | |
1437 | on the Internet. | |
1438 | ||
69282e91 | 1439 | =item get%sname() on closed socket %s |
a0d0e21e | 1440 | |
be771a83 GS |
1441 | (W closed) You tried to get a socket or peer socket name on a closed |
1442 | socket. Did you forget to check the return value of your socket() call? | |
a0d0e21e | 1443 | |
748a9306 LW |
1444 | =item getpwnam returned invalid UIC %#o for user "%s" |
1445 | ||
1446 | (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the | |
1447 | C<getpwnam> operator returned an invalid UIC. | |
1448 | ||
6df41af2 GS |
1449 | =item getsockopt() on closed socket %s |
1450 | ||
be771a83 GS |
1451 | (W closed) You tried to get a socket option on a closed socket. Did you |
1452 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
1453 | L<perlfunc/getsockopt>. |
1454 | ||
1455 | =item Global symbol "%s" requires explicit package name | |
1456 | ||
1457 | (F) You've said "use strict vars", which indicates that all variables | |
1458 | must either be lexically scoped (using "my"), declared beforehand using | |
1459 | "our", or explicitly qualified to say which package the global variable | |
1460 | is in (using "::"). | |
1461 | ||
e476b1b5 GS |
1462 | =item glob failed (%s) |
1463 | ||
be771a83 GS |
1464 | (W glob) Something went wrong with the external program(s) used for |
1465 | C<glob> and C<< <*.c> >>. Usually, this means that you supplied a | |
1466 | C<glob> pattern that caused the external program to fail and exit with a | |
1467 | nonzero status. If the message indicates that the abnormal exit | |
1468 | resulted in a coredump, this may also mean that your csh (C shell) is | |
1469 | broken. If so, you should change all of the csh-related variables in | |
1470 | config.sh: If you have tcsh, make the variables refer to it as if it | |
1471 | were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all | |
1472 | empty (except that C<d_csh> should be C<'undef'>) so that Perl will | |
1473 | think csh is missing. In either case, after editing config.sh, run | |
75b44862 | 1474 | C<./Configure -S> and rebuild Perl. |
e476b1b5 | 1475 | |
a0d0e21e LW |
1476 | =item Glob not terminated |
1477 | ||
1478 | (F) The lexer saw a left angle bracket in a place where it was expecting | |
be771a83 GS |
1479 | a term, so it's looking for the corresponding right angle bracket, and |
1480 | not finding it. Chances are you left some needed parentheses out | |
1481 | earlier in the line, and you really meant a "less than". | |
a0d0e21e | 1482 | |
6df41af2 | 1483 | =item Got an error from DosAllocMem |
a0d0e21e | 1484 | |
6df41af2 GS |
1485 | (P) An error peculiar to OS/2. Most probably you're using an obsolete |
1486 | version of Perl, and this should not happen anyway. | |
a0d0e21e LW |
1487 | |
1488 | =item goto must have label | |
1489 | ||
1490 | (F) Unlike with "next" or "last", you're not allowed to goto an | |
1491 | unspecified destination. See L<perlfunc/goto>. | |
1492 | ||
6df41af2 GS |
1493 | =item %s had compilation errors |
1494 | ||
1495 | (F) The final summary message when a C<perl -c> fails. | |
1496 | ||
a0d0e21e LW |
1497 | =item Had to create %s unexpectedly |
1498 | ||
be771a83 GS |
1499 | (S internal) A routine asked for a symbol from a symbol table that ought |
1500 | to have existed already, but for some reason it didn't, and had to be | |
1501 | created on an emergency basis to prevent a core dump. | |
a0d0e21e LW |
1502 | |
1503 | =item Hash %%s missing the % in argument %d of %s() | |
1504 | ||
be771a83 GS |
1505 | (D deprecated) Really old Perl let you omit the % on hash names in some |
1506 | spots. This is now heavily deprecated. | |
a0d0e21e | 1507 | |
6df41af2 GS |
1508 | =item %s has too many errors |
1509 | ||
1510 | (F) The parser has given up trying to parse the program after 10 errors. | |
1511 | Further error messages would likely be uninformative. | |
1512 | ||
252aa082 JH |
1513 | =item Hexadecimal number > 0xffffffff non-portable |
1514 | ||
e476b1b5 | 1515 | (W portable) The hexadecimal number you specified is larger than 2**32-1 |
9e24b6e2 JH |
1516 | (4294967295) and therefore non-portable between systems. See |
1517 | L<perlport> for more on portability concerns. | |
252aa082 | 1518 | |
8903cb82 | 1519 | =item Identifier too long |
1520 | ||
1521 | (F) Perl limits identifiers (names for variables, functions, etc.) to | |
fc36a67e | 1522 | about 250 characters for simple names, and somewhat more for compound |
be771a83 GS |
1523 | names (like C<$A::B>). You've exceeded Perl's limits. Future versions |
1524 | of Perl are likely to eliminate these arbitrary limitations. | |
8903cb82 | 1525 | |
6df41af2 | 1526 | =item Illegal binary digit %s |
f675dbe5 | 1527 | |
6df41af2 | 1528 | (F) You used a digit other than 0 or 1 in a binary number. |
f675dbe5 | 1529 | |
6df41af2 | 1530 | =item Illegal binary digit %s ignored |
a0d0e21e | 1531 | |
be771a83 GS |
1532 | (W digit) You may have tried to use a digit other than 0 or 1 in a |
1533 | binary number. Interpretation of the binary number stopped before the | |
1534 | offending digit. | |
a0d0e21e | 1535 | |
4fdae800 | 1536 | =item Illegal character %s (carriage return) |
1537 | ||
d5898338 | 1538 | (F) Perl normally treats carriage returns in the program text as it |
be771a83 GS |
1539 | would any other whitespace, which means you should never see this error |
1540 | when Perl was built using standard options. For some reason, your | |
1541 | version of Perl appears to have been built without this support. Talk | |
1542 | to your Perl administrator. | |
4fdae800 | 1543 | |
a0d0e21e LW |
1544 | =item Illegal division by zero |
1545 | ||
be771a83 GS |
1546 | (F) You tried to divide a number by 0. Either something was wrong in |
1547 | your logic, or you need to put a conditional in to guard against | |
1548 | meaningless input. | |
a0d0e21e | 1549 | |
6df41af2 GS |
1550 | =item Illegal hexadecimal digit %s ignored |
1551 | ||
be771a83 GS |
1552 | (W digit) You may have tried to use a character other than 0 - 9 or |
1553 | A - F, a - f in a hexadecimal number. Interpretation of the hexadecimal | |
1554 | number stopped before the illegal character. | |
6df41af2 | 1555 | |
a0d0e21e LW |
1556 | =item Illegal modulus zero |
1557 | ||
be771a83 GS |
1558 | (F) You tried to divide a number by 0 to get the remainder. Most |
1559 | numbers don't take to this kindly. | |
a0d0e21e | 1560 | |
6df41af2 | 1561 | =item Illegal number of bits in vec |
399388f4 | 1562 | |
6df41af2 GS |
1563 | (F) The number of bits in vec() (the third argument) must be a power of |
1564 | two from 1 to 32 (or 64, if your platform supports that). | |
399388f4 GS |
1565 | |
1566 | =item Illegal octal digit %s | |
a0d0e21e LW |
1567 | |
1568 | (F) You used an 8 or 9 in a octal number. | |
1569 | ||
399388f4 | 1570 | =item Illegal octal digit %s ignored |
748a9306 | 1571 | |
75b44862 GS |
1572 | (W digit) You may have tried to use an 8 or 9 in a octal number. |
1573 | Interpretation of the octal number stopped before the 8 or 9. | |
748a9306 | 1574 | |
6df41af2 | 1575 | =item Illegal switch in PERL5OPT: %s |
6ff81951 | 1576 | |
6df41af2 GS |
1577 | (X) The PERL5OPT environment variable may only be used to set the |
1578 | following switches: B<-[DIMUdmw]>. | |
6ff81951 | 1579 | |
6df41af2 | 1580 | =item Ill-formed CRTL environ value "%s" |
81e118e0 | 1581 | |
75b44862 | 1582 | (W internal) A warning peculiar to VMS. Perl tried to read the CRTL's |
be771a83 GS |
1583 | internal environ array, and encountered an element without the C<=> |
1584 | delimiter used to separate keys from values. The element is ignored. | |
09bef843 | 1585 | |
6df41af2 | 1586 | =item Ill-formed message in prime_env_iter: |%s| |
54310121 | 1587 | |
be771a83 GS |
1588 | (W internal) A warning peculiar to VMS. Perl tried to read a logical |
1589 | name or CLI symbol definition when preparing to iterate over %ENV, and | |
1590 | didn't see the expected delimiter between key and value, so the line was | |
1591 | ignored. | |
54310121 | 1592 | |
6df41af2 | 1593 | =item (in cleanup) %s |
9607fc9c | 1594 | |
be771a83 GS |
1595 | (W misc) This prefix usually indicates that a DESTROY() method raised |
1596 | the indicated exception. Since destructors are usually called by the | |
1597 | system at arbitrary points during execution, and often a vast number of | |
1598 | times, the warning is issued only once for any number of failures that | |
1599 | would otherwise result in the same message being repeated. | |
6df41af2 | 1600 | |
be771a83 GS |
1601 | Failure of user callbacks dispatched using the C<G_KEEPERR> flag could |
1602 | also result in this warning. See L<perlcall/G_KEEPERR>. | |
9607fc9c | 1603 | |
a0d0e21e LW |
1604 | =item Insecure dependency in %s |
1605 | ||
8b1a09fc | 1606 | (F) You tried to do something that the tainting mechanism didn't like. |
be771a83 GS |
1607 | The tainting mechanism is turned on when you're running setuid or |
1608 | setgid, or when you specify B<-T> to turn it on explicitly. The | |
1609 | tainting mechanism labels all data that's derived directly or indirectly | |
1610 | from the user, who is considered to be unworthy of your trust. If any | |
1611 | such data is used in a "dangerous" operation, you get this error. See | |
1612 | L<perlsec> for more information. | |
a0d0e21e LW |
1613 | |
1614 | =item Insecure directory in %s | |
1615 | ||
be771a83 GS |
1616 | (F) You can't use system(), exec(), or a piped open in a setuid or |
1617 | setgid script if C<$ENV{PATH}> contains a directory that is writable by | |
1618 | the world. See L<perlsec>. | |
a0d0e21e | 1619 | |
62f468fc | 1620 | =item Insecure $ENV{%s} while running %s |
a0d0e21e LW |
1621 | |
1622 | (F) You can't use system(), exec(), or a piped open in a setuid or | |
62f468fc MG |
1623 | setgid script if any of C<$ENV{PATH}>, C<$ENV{IFS}>, C<$ENV{CDPATH}>, |
1624 | C<$ENV{ENV}> or C<$ENV{BASH_ENV}> are derived from data supplied (or | |
a0d0e21e LW |
1625 | potentially supplied) by the user. The script must set the path to a |
1626 | known value, using trustworthy data. See L<perlsec>. | |
1627 | ||
6df41af2 GS |
1628 | =item In string, @%s now must be written as \@%s |
1629 | ||
1630 | (F) It used to be that Perl would try to guess whether you wanted an | |
be771a83 GS |
1631 | array interpolated or a literal @. It did this when the string was |
1632 | first used at runtime. Now strings are parsed at compile time, and | |
1633 | ambiguous instances of @ must be disambiguated, either by prepending a | |
1634 | backslash to indicate a literal, or by declaring (or using) the array | |
1635 | within the program before the string (lexically). (Someday it will | |
1636 | simply assume that an unbackslashed @ interpolates an array.) | |
6df41af2 | 1637 | |
a7ae9550 GS |
1638 | =item Integer overflow in %s number |
1639 | ||
75b44862 | 1640 | (W overflow) The hexadecimal, octal or binary number you have specified |
be771a83 GS |
1641 | either as a literal or as an argument to hex() or oct() is too big for |
1642 | your architecture, and has been converted to a floating point number. | |
1643 | On a 32-bit architecture the largest hexadecimal, octal or binary number | |
9e24b6e2 JH |
1644 | representable without overflow is 0xFFFFFFFF, 037777777777, or |
1645 | 0b11111111111111111111111111111111 respectively. Note that Perl | |
1646 | transparently promotes all numbers to a floating point representation | |
1647 | internally--subject to loss of precision errors in subsequent | |
1648 | operations. | |
bbce6d69 | 1649 | |
6df41af2 GS |
1650 | =item internal disaster in regexp |
1651 | ||
1652 | (P) Something went badly wrong in the regular expression parser. | |
1653 | ||
748a9306 LW |
1654 | =item Internal inconsistency in tracking vforks |
1655 | ||
be771a83 GS |
1656 | (S) A warning peculiar to VMS. Perl keeps track of the number of times |
1657 | you've called C<fork> and C<exec>, to determine whether the current call | |
1658 | to C<exec> should affect the current script or a subprocess (see | |
1659 | L<perlvms/"exec LIST">). Somehow, this count has become scrambled, so | |
1660 | Perl is making a guess and treating this C<exec> as a request to | |
1661 | terminate the Perl script and execute the specified command. | |
748a9306 | 1662 | |
a0d0e21e LW |
1663 | =item internal urp in regexp at /%s/ |
1664 | ||
1665 | (P) Something went badly awry in the regular expression parser. | |
1666 | ||
6df41af2 GS |
1667 | =item %s (...) interpreted as function |
1668 | ||
75b44862 | 1669 | (W syntax) You've run afoul of the rule that says that any list operator |
be771a83 GS |
1670 | followed by parentheses turns into a function, with all the list |
1671 | operators arguments found inside the parentheses. See L<perlop/Terms | |
1672 | and List Operators (Leftward)>. | |
6df41af2 | 1673 | |
09bef843 SB |
1674 | =item Invalid %s attribute: %s |
1675 | ||
1676 | The indicated attribute for a subroutine or variable was not recognized | |
1677 | by Perl or by a user-supplied handler. See L<attributes>. | |
1678 | ||
1679 | =item Invalid %s attributes: %s | |
1680 | ||
be771a83 GS |
1681 | The indicated attributes for a subroutine or variable were not |
1682 | recognized by Perl or by a user-supplied handler. See L<attributes>. | |
09bef843 | 1683 | |
c635e13b | 1684 | =item Invalid conversion in %s: "%s" |
1685 | ||
be771a83 GS |
1686 | (W printf) Perl does not understand the given format conversion. See |
1687 | L<perlfunc/sprintf>. | |
c635e13b | 1688 | |
6df41af2 GS |
1689 | =item invalid [] range "%s" in regexp |
1690 | ||
1691 | (F) The range specified in a character class had a minimum character | |
1692 | greater than the maximum character. See L<perlre>. | |
1693 | ||
09bef843 SB |
1694 | =item Invalid separator character %s in attribute list |
1695 | ||
0120eecf | 1696 | (F) Something other than a colon or whitespace was seen between the |
be771a83 GS |
1697 | elements of an attribute list. If the previous attribute had a |
1698 | parenthesised parameter list, perhaps that list was terminated too soon. | |
1699 | See L<attributes>. | |
09bef843 | 1700 | |
96e4d5b1 | 1701 | =item Invalid type in pack: '%s' |
1702 | ||
8903cb82 | 1703 | (F) The given character is not a valid pack type. See L<perlfunc/pack>. |
be771a83 GS |
1704 | (W pack) The given character is not a valid pack type but used to be |
1705 | silently ignored. | |
96e4d5b1 | 1706 | |
1707 | =item Invalid type in unpack: '%s' | |
1708 | ||
be771a83 GS |
1709 | (F) The given character is not a valid unpack type. See |
1710 | L<perlfunc/unpack>. | |
75b44862 GS |
1711 | (W unpack) The given character is not a valid unpack type but used to be |
1712 | silently ignored. | |
96e4d5b1 | 1713 | |
a0d0e21e LW |
1714 | =item ioctl is not implemented |
1715 | ||
1716 | (F) Your machine apparently doesn't implement ioctl(), which is pretty | |
1717 | strange for a machine that supports C. | |
1718 | ||
1719 | =item junk on end of regexp | |
1720 | ||
1721 | (P) The regular expression parser is confused. | |
1722 | ||
1723 | =item Label not found for "last %s" | |
1724 | ||
be771a83 GS |
1725 | (F) You named a loop to break out of, but you're not currently in a loop |
1726 | of that name, not even if you count where you were called from. See | |
1727 | L<perlfunc/last>. | |
a0d0e21e LW |
1728 | |
1729 | =item Label not found for "next %s" | |
1730 | ||
1731 | (F) You named a loop to continue, but you're not currently in a loop of | |
1732 | that name, not even if you count where you were called from. See | |
1733 | L<perlfunc/last>. | |
1734 | ||
1735 | =item Label not found for "redo %s" | |
1736 | ||
1737 | (F) You named a loop to restart, but you're not currently in a loop of | |
1738 | that name, not even if you count where you were called from. See | |
1739 | L<perlfunc/last>. | |
1740 | ||
85ab1d1d | 1741 | =item leaving effective %s failed |
5ff3f7a4 | 1742 | |
85ab1d1d | 1743 | (F) While under the C<use filetest> pragma, switching the real and |
5ff3f7a4 GS |
1744 | effective uids or gids failed. |
1745 | ||
69282e91 | 1746 | =item listen() on closed socket %s |
a0d0e21e | 1747 | |
be771a83 GS |
1748 | (W closed) You tried to do a listen on a closed socket. Did you forget |
1749 | to check the return value of your socket() call? See | |
1750 | L<perlfunc/listen>. | |
a0d0e21e | 1751 | |
cd06dffe GS |
1752 | =item Lvalue subs returning %s not implemented yet |
1753 | ||
1754 | (F) Due to limitations in the current implementation, array and hash | |
be771a83 GS |
1755 | values cannot be returned in subroutines used in lvalue context. See |
1756 | L<perlsub/"Lvalue subroutines">. | |
cd06dffe | 1757 | |
6df41af2 GS |
1758 | =item Malformed PERLLIB_PREFIX |
1759 | ||
1760 | (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form | |
1761 | ||
1762 | prefix1;prefix2 | |
1763 | ||
1764 | or | |
1765 | ||
1766 | prefix1 prefix2 | |
1767 | ||
be771a83 GS |
1768 | with nonempty prefix1 and prefix2. If C<prefix1> is indeed a prefix of |
1769 | a builtin library search path, prefix2 is substituted. The error may | |
1770 | appear if components are not found, or are too long. See | |
6df41af2 GS |
1771 | "PERLLIB_PREFIX" in F<README.os2>. |
1772 | ||
1773 | =item %s matches null string many times | |
1774 | ||
1775 | (W regexp) The pattern you've specified would be an infinite loop if the | |
be771a83 GS |
1776 | regular expression engine didn't specifically check for that. See |
1777 | L<perlre>. | |
6df41af2 GS |
1778 | |
1779 | =item % may only be used in unpack | |
1780 | ||
1781 | (F) You can't pack a string by supplying a checksum, because the | |
be771a83 GS |
1782 | checksumming process loses information, and you can't go the other way. |
1783 | See L<perlfunc/unpack>. | |
6df41af2 | 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 | 1788 | doesn't resolve to a valid subroutine. See L<overload>. |
a0d0e21e | 1789 | |
3cdd684c TP |
1790 | =item Method %s not permitted |
1791 | ||
1792 | See 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 | |
1797 | by a missing delimiter on a string or pattern, because it eventually | |
1798 | ended earlier on the current line. | |
1799 | ||
1800 | =item Misplaced _ in number | |
1801 | ||
e476b1b5 | 1802 | (W syntax) An underline in a decimal constant wasn't on a 3-digit boundary. |
a0d0e21e | 1803 | |
4a2d328f | 1804 | =item Missing %sbrace%s on \N{} |
423cee85 | 1805 | |
4a2d328f | 1806 | (F) Wrong syntax of character name literal C<\N{charname}> within |
423cee85 JH |
1807 | double-quotish context. |
1808 | ||
a0d0e21e LW |
1809 | =item Missing comma after first argument to %s function |
1810 | ||
1811 | (F) While certain functions allow you to specify a filehandle or an | |
1812 | "indirect object" before the argument list, this ain't one of them. | |
1813 | ||
06eaf0bc GS |
1814 | =item Missing command in piped open |
1815 | ||
be771a83 GS |
1816 | (W pipe) You used the C<open(FH, "| command")> or |
1817 | C<open(FH, "command |")> construction, but the command was missing or | |
1818 | blank. | |
06eaf0bc | 1819 | |
6df41af2 GS |
1820 | =item Missing name in "my sub" |
1821 | ||
be771a83 GS |
1822 | (F) The reserved syntax for lexically scoped subroutines requires that |
1823 | they have a name with which they can be found. | |
6df41af2 GS |
1824 | |
1825 | =item Missing $ on loop variable | |
1826 | ||
be771a83 GS |
1827 | (F) Apparently you've been programming in B<csh> too much. Variables |
1828 | are always mentioned with the $ in Perl, unlike in the shells, where it | |
1829 | can vary from one line to the next. | |
6df41af2 | 1830 | |
cc507455 | 1831 | =item (Missing operator before %s?) |
748a9306 LW |
1832 | |
1833 | (S) This is an educated guess made in conjunction with the message "%s | |
1834 | found where operator expected". Often the missing operator is a comma. | |
1835 | ||
d98d5fff | 1836 | =item Missing right curly or square bracket |
a0d0e21e | 1837 | |
be771a83 GS |
1838 | (F) The lexer counted more opening curly or square brackets than closing |
1839 | ones. As a general rule, you'll find it's missing near the place you | |
1840 | were last editing. | |
a0d0e21e | 1841 | |
6df41af2 GS |
1842 | =item (Missing semicolon on previous line?) |
1843 | ||
1844 | (S) This is an educated guess made in conjunction with the message "%s | |
1845 | found where operator expected". Don't automatically put a semicolon on | |
1846 | the previous line just because you saw this message. | |
1847 | ||
a0d0e21e LW |
1848 | =item Modification of a read-only value attempted |
1849 | ||
1850 | (F) You tried, directly or indirectly, to change the value of a | |
5f05dabc | 1851 | constant. You didn't, of course, try "2 = 1", because the compiler |
a0d0e21e LW |
1852 | catches that. But an easy way to do the same thing is: |
1853 | ||
1854 | sub mod { $_[0] = 1 } | |
1855 | mod(2); | |
1856 | ||
1857 | Another way is to assign to a substr() that's off the end of the string. | |
1858 | ||
4fe4fdb3 | 1859 | =item Modification of non-creatable array value attempted, subscript %d |
a0d0e21e LW |
1860 | |
1861 | (F) You tried to make an array value spring into existence, and the | |
1862 | subscript was probably negative, even counting from end of the array | |
1863 | backwards. | |
1864 | ||
4fe4fdb3 | 1865 | =item Modification of non-creatable hash value attempted, subscript "%s" |
a0d0e21e | 1866 | |
be771a83 GS |
1867 | (P) You tried to make a hash value spring into existence, and it |
1868 | couldn't be created for some peculiar reason. | |
a0d0e21e LW |
1869 | |
1870 | =item Module name must be constant | |
1871 | ||
1872 | (F) Only a bare module name is allowed as the first argument to a "use". | |
1873 | ||
6df41af2 GS |
1874 | =item Module name required with -M option |
1875 | ||
1876 | (F) The C<-M> option says that Perl should load some module, but you | |
1877 | omitted the name of the module. Consult L<perlrun> for full details | |
1878 | about C<-M>. | |
1879 | ||
a0d0e21e LW |
1880 | =item msg%s not implemented |
1881 | ||
1882 | (F) You don't have System V message IPC on your system. | |
1883 | ||
1884 | =item Multidimensional syntax %s not supported | |
1885 | ||
75b44862 GS |
1886 | (W syntax) Multidimensional arrays aren't written like C<$foo[1,2,3]>. |
1887 | They're written like C<$foo[1][2][3]>, as in C. | |
8b1a09fc | 1888 | |
6df41af2 | 1889 | =item / must be followed by a*, A* or Z* |
09bef843 | 1890 | |
6df41af2 | 1891 | (F) You had a pack template indicating a counted-length string, |
be771a83 GS |
1892 | Currently the only things that can have their length counted are a*, A* |
1893 | or Z*. See L<perlfunc/pack>. | |
6df41af2 GS |
1894 | |
1895 | =item / must be followed by a, A or Z | |
1896 | ||
be771a83 GS |
1897 | (F) You had an unpack template indicating a counted-length string, which |
1898 | must be followed by one of the letters a, A or Z to indicate what sort | |
1899 | of string is to be unpacked. See L<perlfunc/pack>. | |
6df41af2 GS |
1900 | |
1901 | =item / must follow a numeric type | |
1902 | ||
be771a83 GS |
1903 | (F) You had an unpack template that contained a '#', but this did not |
1904 | follow some numeric unpack specification. See L<perlfunc/pack>. | |
6df41af2 GS |
1905 | |
1906 | =item "my sub" not yet implemented | |
1907 | ||
be771a83 GS |
1908 | (F) Lexically scoped subroutines are not yet implemented. Don't try |
1909 | that yet. | |
6df41af2 GS |
1910 | |
1911 | =item "my" variable %s can't be in a package | |
1912 | ||
be771a83 GS |
1913 | (F) Lexically scoped variables aren't in a package, so it doesn't make |
1914 | sense to try to declare one with a package qualifier on the front. Use | |
1915 | local() if you want to localize a package variable. | |
09bef843 | 1916 | |
8b1a09fc | 1917 | =item Name "%s::%s" used only once: possible typo |
1918 | ||
e476b1b5 | 1919 | (W once) Typographical errors often show up as unique variable names. |
be771a83 GS |
1920 | If you had a good reason for having a unique name, then just mention it |
1921 | again somehow to suppress the message. The C<our> declaration is | |
77ca0c92 | 1922 | provided for this purpose. |
a0d0e21e LW |
1923 | |
1924 | =item Negative length | |
1925 | ||
be771a83 GS |
1926 | (F) You tried to do a read/write/send/recv operation with a buffer |
1927 | length that is less than 0. This is difficult to imagine. | |
a0d0e21e LW |
1928 | |
1929 | =item nested *?+ in regexp | |
1930 | ||
5f05dabc | 1931 | (F) You can't quantify a quantifier without intervening parentheses. So |
a0d0e21e LW |
1932 | things like ** or +* or ?* are illegal. |
1933 | ||
be771a83 GS |
1934 | Note, however, that the minimal matching quantifiers, C<*?>, C<+?>, and |
1935 | C<??> appear to be nested quantifiers, but aren't. See L<perlre>. | |
a0d0e21e | 1936 | |
6df41af2 | 1937 | =item %s never introduced |
a0d0e21e | 1938 | |
be771a83 GS |
1939 | (S internal) The symbol in question was declared but somehow went out of |
1940 | scope before it could possibly have been used. | |
a0d0e21e LW |
1941 | |
1942 | =item No %s allowed while running setuid | |
1943 | ||
be771a83 GS |
1944 | (F) Certain operations are deemed to be too insecure for a setuid or |
1945 | setgid script to even be allowed to attempt. Generally speaking there | |
1946 | will be another way to do what you want that is, if not secure, at least | |
1947 | securable. See L<perlsec>. | |
a0d0e21e LW |
1948 | |
1949 | =item No B<-e> allowed in setuid scripts | |
1950 | ||
1951 | (F) A setuid script can't be specified by the user. | |
1952 | ||
1953 | =item No comma allowed after %s | |
1954 | ||
1955 | (F) A list operator that has a filehandle or "indirect object" is not | |
1956 | allowed to have a comma between that and the following arguments. | |
1957 | Otherwise it'd be just another one of the arguments. | |
1958 | ||
0a753a76 | 1959 | One possible cause for this is that you expected to have imported a |
1960 | constant to your name space with B<use> or B<import> while no such | |
1961 | importing took place, it may for example be that your operating system | |
1962 | does not support that particular constant. Hopefully you did use an | |
1963 | explicit import list for the constants you expect to see, please see | |
1964 | L<perlfunc/use> and L<perlfunc/import>. While an explicit import list | |
1965 | would probably have caught this error earlier it naturally does not | |
1966 | remedy the fact that your operating system still does not support that | |
1967 | constant. Maybe you have a typo in the constants of the symbol import | |
1968 | list of B<use> or B<import> or in the constant name at the line where | |
1969 | this error was triggered? | |
1970 | ||
748a9306 LW |
1971 | =item No command into which to pipe on command line |
1972 | ||
be771a83 GS |
1973 | (F) An error peculiar to VMS. Perl handles its own command line |
1974 | redirection, and found a '|' at the end of the command line, so it | |
1975 | doesn't know where you want to pipe the output from this command. | |
748a9306 | 1976 | |
a0d0e21e LW |
1977 | =item No DB::DB routine defined |
1978 | ||
be771a83 GS |
1979 | (F) The currently executing code was compiled with the B<-d> switch, but |
1980 | for some reason the perl5db.pl file (or some facsimile thereof) didn't | |
1981 | define a routine to be called at the beginning of each statement. Which | |
1982 | is odd, because the file should have been required automatically, and | |
1983 | should have blown up the require if it didn't parse right. | |
a0d0e21e LW |
1984 | |
1985 | =item No dbm on this machine | |
1986 | ||
1987 | (P) This is counted as an internal error, because every machine should | |
5f05dabc | 1988 | supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>. |
a0d0e21e LW |
1989 | |
1990 | =item No DBsub routine | |
1991 | ||
1992 | (F) The currently executing code was compiled with the B<-d> switch, | |
1993 | but for some reason the perl5db.pl file (or some facsimile thereof) | |
1994 | didn't define a DB::sub routine to be called at the beginning of each | |
1995 | ordinary subroutine call. | |
1996 | ||
c47ff5f1 | 1997 | =item No error file after 2> or 2>> on command line |
748a9306 | 1998 | |
be771a83 GS |
1999 | (F) An error peculiar to VMS. Perl handles its own command line |
2000 | redirection, and found a '2>' or a '2>>' on the command line, but can't | |
2001 | find the name of the file to which to write data destined for stderr. | |
748a9306 | 2002 | |
c47ff5f1 | 2003 | =item No input file after < on command line |
748a9306 | 2004 | |
be771a83 GS |
2005 | (F) An error peculiar to VMS. Perl handles its own command line |
2006 | redirection, and found a '<' on the command line, but can't find the | |
2007 | name of the file from which to read data for stdin. | |
748a9306 | 2008 | |
6df41af2 GS |
2009 | =item No #! line |
2010 | ||
2011 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2012 | even on machines that don't support the #! construct. | |
2013 | ||
2014 | =item "no" not allowed in expression | |
2015 | ||
be771a83 GS |
2016 | (F) The "no" keyword is recognized and executed at compile time, and |
2017 | returns no useful value. See L<perlmod>. | |
6df41af2 | 2018 | |
c47ff5f1 | 2019 | =item No output file after > on command line |
748a9306 | 2020 | |
be771a83 GS |
2021 | (F) An error peculiar to VMS. Perl handles its own command line |
2022 | redirection, and found a lone '>' at the end of the command line, so it | |
2023 | doesn't know where you wanted to redirect stdout. | |
748a9306 | 2024 | |
c47ff5f1 | 2025 | =item No output file after > or >> on command line |
748a9306 | 2026 | |
be771a83 GS |
2027 | (F) An error peculiar to VMS. Perl handles its own command line |
2028 | redirection, and found a '>' or a '>>' on the command line, but can't | |
2029 | find the name of the file to which to write data destined for stdout. | |
748a9306 | 2030 | |
1ec3e8de GS |
2031 | =item No package name allowed for variable %s in "our" |
2032 | ||
be771a83 GS |
2033 | (F) Fully qualified variable names are not allowed in "our" |
2034 | declarations, because that doesn't make much sense under existing | |
2035 | semantics. Such syntax is reserved for future extensions. | |
1ec3e8de | 2036 | |
a0d0e21e LW |
2037 | =item No Perl script found in input |
2038 | ||
2039 | (F) You called C<perl -x>, but no line was found in the file beginning | |
2040 | with #! and containing the word "perl". | |
2041 | ||
2042 | =item No setregid available | |
2043 | ||
2044 | (F) Configure didn't find anything resembling the setregid() call for | |
2045 | your system. | |
2046 | ||
2047 | =item No setreuid available | |
2048 | ||
2049 | (F) Configure didn't find anything resembling the setreuid() call for | |
2050 | your system. | |
2051 | ||
a67e862a | 2052 | =item No space allowed after -%c |
a0d0e21e | 2053 | |
be771a83 GS |
2054 | (F) The argument to the indicated command line switch must follow |
2055 | immediately after the switch, without intervening spaces. | |
a0d0e21e | 2056 | |
6df41af2 GS |
2057 | =item No %s specified for -%c |
2058 | ||
2059 | (F) The indicated command line switch needs a mandatory argument, but | |
2060 | you haven't specified one. | |
2061 | ||
2062 | =item No such pipe open | |
2063 | ||
2064 | (P) An error peculiar to VMS. The internal routine my_pclose() tried to | |
be771a83 GS |
2065 | close a pipe which hadn't been opened. This should have been caught |
2066 | earlier as an attempt to close an unopened filehandle. | |
6df41af2 | 2067 | |
88e9b055 | 2068 | =item No such pseudo-hash field "%s" |
57079c46 | 2069 | |
88e9b055 | 2070 | (F) You tried to access an array as a hash, but the field name used is |
57079c46 GA |
2071 | not defined. The hash at index 0 should map all valid field names to |
2072 | array indices for that to work. | |
2073 | ||
88e9b055 | 2074 | =item No such pseudo-hash field "%s" in variable %s of type %s |
f1192cee | 2075 | |
be771a83 GS |
2076 | (F) You tried to access a field of a typed variable where the type does |
2077 | not know about the field name. The field names are looked up in the | |
2078 | %FIELDS hash in the type package at compile time. The %FIELDS hash is | |
2079 | %usually set up with the 'fields' pragma. | |
f1192cee | 2080 | |
a0d0e21e LW |
2081 | =item No such signal: SIG%s |
2082 | ||
be771a83 GS |
2083 | (W signal) You specified a signal name as a subscript to %SIG that was |
2084 | not recognized. Say C<kill -l> in your shell to see the valid signal | |
2085 | names on your system. | |
a0d0e21e LW |
2086 | |
2087 | =item Not a CODE reference | |
2088 | ||
2089 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2090 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
2091 | use the ref() function to find out what kind of ref it really was. See |
2092 | also L<perlref>. | |
a0d0e21e LW |
2093 | |
2094 | =item Not a format reference | |
2095 | ||
2096 | (F) I'm not sure how you managed to generate a reference to an anonymous | |
2097 | format, but this indicates you did, and that it didn't exist. | |
2098 | ||
2099 | =item Not a GLOB reference | |
2100 | ||
be771a83 GS |
2101 | (F) Perl was trying to evaluate a reference to a "typeglob" (that is, a |
2102 | symbol table entry that looks like C<*foo>), but found a reference to | |
2103 | something else instead. You can use the ref() function to find out what | |
2104 | kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
2105 | |
2106 | =item Not a HASH reference | |
2107 | ||
be771a83 GS |
2108 | (F) Perl was trying to evaluate a reference to a hash value, but found a |
2109 | reference to something else instead. You can use the ref() function to | |
2110 | find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e | 2111 | |
6df41af2 GS |
2112 | =item Not an ARRAY reference |
2113 | ||
be771a83 GS |
2114 | (F) Perl was trying to evaluate a reference to an array value, but found |
2115 | a reference to something else instead. You can use the ref() function | |
2116 | to find out what kind of ref it really was. See L<perlref>. | |
6df41af2 | 2117 | |
a0d0e21e LW |
2118 | =item Not a perl script |
2119 | ||
2120 | (F) The setuid emulator requires that scripts have a well-formed #! line | |
2121 | even on machines that don't support the #! construct. The line must | |
2122 | mention perl. | |
2123 | ||
2124 | =item Not a SCALAR reference | |
2125 | ||
be771a83 GS |
2126 | (F) Perl was trying to evaluate a reference to a scalar value, but found |
2127 | a reference to something else instead. You can use the ref() function | |
2128 | to find out what kind of ref it really was. See L<perlref>. | |
a0d0e21e LW |
2129 | |
2130 | =item Not a subroutine reference | |
2131 | ||
2132 | (F) Perl was trying to evaluate a reference to a code value (that is, a | |
2133 | subroutine), but found a reference to something else instead. You can | |
be771a83 GS |
2134 | use the ref() function to find out what kind of ref it really was. See |
2135 | also L<perlref>. | |
a0d0e21e | 2136 | |
e7ea3e70 | 2137 | =item Not a subroutine reference in overload table |
a0d0e21e LW |
2138 | |
2139 | (F) An attempt was made to specify an entry in an overloading table that | |
8b1a09fc | 2140 | doesn't somehow point to a valid subroutine. See L<overload>. |
a0d0e21e | 2141 | |
a0d0e21e LW |
2142 | =item Not enough arguments for %s |
2143 | ||
2144 | (F) The function requires more arguments than you specified. | |
2145 | ||
6df41af2 GS |
2146 | =item Not enough format arguments |
2147 | ||
be771a83 GS |
2148 | (W syntax) A format specified more picture fields than the next line |
2149 | supplied. See L<perlform>. | |
6df41af2 GS |
2150 | |
2151 | =item %s: not found | |
2152 | ||
be771a83 GS |
2153 | (A) You've accidentally run your script through the Bourne shell instead |
2154 | of Perl. Check the #! line, or manually feed your script into Perl | |
2155 | yourself. | |
6df41af2 GS |
2156 | |
2157 | =item no UTC offset information; assuming local time is UTC | |
a0d0e21e | 2158 | |
6df41af2 GS |
2159 | (S) A warning peculiar to VMS. Perl was unable to find the local |
2160 | timezone offset, so it's assuming that local system time is equivalent | |
be771a83 GS |
2161 | to UTC. If it's not, define the logical name |
2162 | F<SYS$TIMEZONE_DIFFERENTIAL> to translate to the number of seconds which | |
2163 | need to be added to UTC to get local time. | |
a0d0e21e LW |
2164 | |
2165 | =item Null filename used | |
2166 | ||
be771a83 GS |
2167 | (F) You can't require the null filename, especially because on many |
2168 | machines that means the current directory! See L<perlfunc/require>. | |
a0d0e21e | 2169 | |
6df41af2 GS |
2170 | =item NULL OP IN RUN |
2171 | ||
be771a83 GS |
2172 | (P debugging) Some internal routine called run() with a null opcode |
2173 | pointer. | |
6df41af2 | 2174 | |
55497cff | 2175 | =item Null picture in formline |
2176 | ||
2177 | (F) The first argument to formline must be a valid format picture | |
2178 | specification. It was found to be empty, which probably means you | |
2179 | supplied it an uninitialized value. See L<perlform>. | |
2180 | ||
a0d0e21e LW |
2181 | =item Null realloc |
2182 | ||
2183 | (P) An attempt was made to realloc NULL. | |
2184 | ||
2185 | =item NULL regexp argument | |
2186 | ||
5f05dabc | 2187 | (P) The internal pattern matching routines blew it big time. |
a0d0e21e LW |
2188 | |
2189 | =item NULL regexp parameter | |
2190 | ||
2191 | (P) The internal pattern matching routines are out of their gourd. | |
2192 | ||
fc36a67e | 2193 | =item Number too long |
2194 | ||
be771a83 GS |
2195 | (F) Perl limits the representation of decimal numbers in programs to |
2196 | about about 250 characters. You've exceeded that length. Future | |
2197 | versions of Perl are likely to eliminate this arbitrary limitation. In | |
2198 | the meantime, try using scientific notation (e.g. "1e6" instead of | |
2199 | "1_000_000"). | |
fc36a67e | 2200 | |
6df41af2 GS |
2201 | =item Octal number in vector unsupported |
2202 | ||
be771a83 GS |
2203 | (F) Numbers with a leading C<0> are not currently allowed in vectors. |
2204 | The octal number interpretation of such numbers may be supported in a | |
2205 | future version. | |
6df41af2 | 2206 | |
252aa082 JH |
2207 | =item Octal number > 037777777777 non-portable |
2208 | ||
75b44862 | 2209 | (W portable) The octal number you specified is larger than 2**32-1 |
be771a83 GS |
2210 | (4294967295) and therefore non-portable between systems. See |
2211 | L<perlport> for more on portability concerns. | |
252aa082 JH |
2212 | |
2213 | See also L<perlport> for writing portable code. | |
2214 | ||
1930e939 | 2215 | =item Odd number of elements in hash assignment |
a0d0e21e | 2216 | |
be771a83 GS |
2217 | (W misc) You specified an odd number of elements to initialize a hash, |
2218 | which is odd, because hashes come in key/value pairs. | |
a0d0e21e | 2219 | |
bbce6d69 | 2220 | =item Offset outside string |
2221 | ||
2222 | (F) You tried to do a read/write/send/recv operation with an offset | |
be771a83 GS |
2223 | pointing outside the buffer. This is difficult to imagine. The sole |
2224 | exception to this is that C<sysread()>ing past the buffer will extend | |
2225 | the buffer and zero pad the new area. | |
bbce6d69 | 2226 | |
a0d0e21e LW |
2227 | =item oops: oopsAV |
2228 | ||
e476b1b5 | 2229 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e LW |
2230 | |
2231 | =item oops: oopsHV | |
2232 | ||
e476b1b5 | 2233 | (S internal) An internal warning that the grammar is screwed up. |
a0d0e21e | 2234 | |
56f7f34b | 2235 | =item Operation `%s': no method found, %s |
44a8e56a | 2236 | |
be771a83 GS |
2237 | (F) An attempt was made to perform an overloaded operation for which no |
2238 | handler was defined. While some handlers can be autogenerated in terms | |
2239 | of other handlers, there is no default handler for any operation, unless | |
2240 | C<fallback> overloading key is specified to be true. See L<overload>. | |
44a8e56a | 2241 | |
748a9306 LW |
2242 | =item Operator or semicolon missing before %s |
2243 | ||
be771a83 GS |
2244 | (S ambiguous) You used a variable or subroutine call where the parser |
2245 | was expecting an operator. The parser has assumed you really meant to | |
2246 | use an operator, but this is highly likely to be incorrect. For | |
2247 | example, if you say "*foo *foo" it will be interpreted as if you said | |
2248 | "*foo * 'foo'". | |
748a9306 | 2249 | |
6df41af2 GS |
2250 | =item "our" variable %s redeclared |
2251 | ||
be771a83 GS |
2252 | (W misc) You seem to have already declared the same global once before |
2253 | in the current lexical scope. | |
6df41af2 | 2254 | |
a80b8354 GS |
2255 | =item Out of memory! |
2256 | ||
2257 | (X) The malloc() function returned 0, indicating there was insufficient | |
be771a83 GS |
2258 | remaining memory (or virtual memory) to satisfy the request. Perl has |
2259 | no option but to exit immediately. | |
a80b8354 | 2260 | |
6df41af2 | 2261 | =item Out of memory during "large" request for %s |
a0d0e21e | 2262 | |
6df41af2 GS |
2263 | (F) The malloc() function returned 0, indicating there was insufficient |
2264 | remaining memory (or virtual memory) to satisfy the request. However, | |
be771a83 GS |
2265 | the request was judged large enough (compile-time default is 64K), so a |
2266 | possibility to shut down by trapping this error is granted. | |
a0d0e21e | 2267 | |
1b979e0a | 2268 | =item Out of memory during request for %s |
a0d0e21e | 2269 | |
be771a83 GS |
2270 | (X|F) The malloc() function returned 0, indicating there was |
2271 | insufficient remaining memory (or virtual memory) to satisfy the | |
2272 | request. | |
eff9c6e2 CS |
2273 | |
2274 | The request was judged to be small, so the possibility to trap it | |
2275 | depends on the way perl was compiled. By default it is not trappable. | |
be771a83 GS |
2276 | However, if compiled for this, Perl may use the contents of C<$^M> as an |
2277 | emergency pool after die()ing with this message. In this case the error | |
2278 | is trappable I<once>. | |
55497cff | 2279 | |
1b979e0a IZ |
2280 | =item Out of memory during ridiculously large request |
2281 | ||
2282 | (F) You can't allocate more than 2^31+"small amount" bytes. This error | |
be771a83 GS |
2283 | is most likely to be caused by a typo in the Perl program. e.g., |
2284 | C<$arr[time]> instead of C<$arr[$time]>. | |
1b979e0a | 2285 | |
6df41af2 GS |
2286 | =item Out of memory for yacc stack |
2287 | ||
be771a83 GS |
2288 | (F) The yacc parser wanted to grow its stack so it could continue |
2289 | parsing, but realloc() wouldn't give it more memory, virtual or | |
2290 | otherwise. | |
6df41af2 GS |
2291 | |
2292 | =item @ outside of string | |
2293 | ||
2294 | (F) You had a pack template that specified an absolute position outside | |
2295 | the string being unpacked. See L<perlfunc/pack>. | |
2296 | ||
2297 | =item %s package attribute may clash with future reserved word: %s | |
2298 | ||
be771a83 GS |
2299 | (W reserved) A lowercase attribute name was used that had a |
2300 | package-specific handler. That name might have a meaning to Perl itself | |
2301 | some day, even though it doesn't yet. Perhaps you should use a | |
2302 | mixed-case attribute name, instead. See L<attributes>. | |
6df41af2 | 2303 | |
a0d0e21e LW |
2304 | =item page overflow |
2305 | ||
be771a83 GS |
2306 | (W io) A single call to write() produced more lines than can fit on a |
2307 | page. See L<perlform>. | |
a0d0e21e | 2308 | |
6df41af2 GS |
2309 | =item panic: %s |
2310 | ||
2311 | (P) An internal error. | |
2312 | ||
a0d0e21e LW |
2313 | =item panic: ck_grep |
2314 | ||
2315 | (P) Failed an internal consistency check trying to compile a grep. | |
2316 | ||
2317 | =item panic: ck_split | |
2318 | ||
2319 | (P) Failed an internal consistency check trying to compile a split. | |
2320 | ||
2321 | =item panic: corrupt saved stack index | |
2322 | ||
be771a83 GS |
2323 | (P) The savestack was requested to restore more localized values than |
2324 | there are in the savestack. | |
a0d0e21e | 2325 | |
810b8aa5 GS |
2326 | =item panic: del_backref |
2327 | ||
2328 | (P) Failed an internal consistency check while trying to reset a weak | |
2329 | reference. | |
2330 | ||
a0d0e21e LW |
2331 | =item panic: die %s |
2332 | ||
2333 | (P) We popped the context stack to an eval context, and then discovered | |
2334 | it wasn't an eval context. | |
2335 | ||
2336 | =item panic: do_match | |
2337 | ||
be771a83 GS |
2338 | (P) The internal pp_match() routine was called with invalid operational |
2339 | data. | |
a0d0e21e LW |
2340 | |
2341 | =item panic: do_split | |
2342 | ||
2343 | (P) Something terrible went wrong in setting up for the split. | |
2344 | ||
2345 | =item panic: do_subst | |
2346 | ||
be771a83 GS |
2347 | (P) The internal pp_subst() routine was called with invalid operational |
2348 | data. | |
a0d0e21e LW |
2349 | |
2350 | =item panic: do_trans | |
2351 | ||
be771a83 GS |
2352 | (P) The internal do_trans() routine was called with invalid operational |
2353 | data. | |
a0d0e21e | 2354 | |
c635e13b | 2355 | =item panic: frexp |
2356 | ||
2357 | (P) The library function frexp() failed, making printf("%f") impossible. | |
2358 | ||
a0d0e21e LW |
2359 | =item panic: goto |
2360 | ||
2361 | (P) We popped the context stack to a context with the specified label, | |
2362 | and then discovered it wasn't a context we know how to do a goto in. | |
2363 | ||
2364 | =item panic: INTERPCASEMOD | |
2365 | ||
2366 | (P) The lexer got into a bad state at a case modifier. | |
2367 | ||
2368 | =item panic: INTERPCONCAT | |
2369 | ||
2370 | (P) The lexer got into a bad state parsing a string with brackets. | |
2371 | ||
e446cec8 IZ |
2372 | =item panic: kid popen errno read |
2373 | ||
2374 | (F) forked child returned an incomprehensible message about its errno. | |
2375 | ||
a0d0e21e LW |
2376 | =item panic: last |
2377 | ||
2378 | (P) We popped the context stack to a block context, and then discovered | |
2379 | it wasn't a block context. | |
2380 | ||
2381 | =item panic: leave_scope clearsv | |
2382 | ||
be771a83 GS |
2383 | (P) A writable lexical variable became read-only somehow within the |
2384 | scope. | |
a0d0e21e LW |
2385 | |
2386 | =item panic: leave_scope inconsistency | |
2387 | ||
2388 | (P) The savestack probably got out of sync. At least, there was an | |
2389 | invalid enum on the top of it. | |
2390 | ||
810b8aa5 GS |
2391 | =item panic: magic_killbackrefs |
2392 | ||
2393 | (P) Failed an internal consistency check while trying to reset all weak | |
2394 | references to an object. | |
2395 | ||
6df41af2 GS |
2396 | =item panic: malloc |
2397 | ||
2398 | (P) Something requested a negative number of bytes of malloc. | |
2399 | ||
a0d0e21e LW |
2400 | =item panic: mapstart |
2401 | ||
2402 | (P) The compiler is screwed up with respect to the map() function. | |
2403 | ||
2404 | =item panic: null array | |
2405 | ||
2406 | (P) One of the internal array routines was passed a null AV pointer. | |
2407 | ||
2408 | =item panic: pad_alloc | |
2409 | ||
2410 | (P) The compiler got confused about which scratch pad it was allocating | |
2411 | and freeing temporaries and lexicals from. | |
2412 | ||
2413 | =item panic: pad_free curpad | |
2414 | ||
2415 | (P) The compiler got confused about which scratch pad it was allocating | |
2416 | and freeing temporaries and lexicals from. | |
2417 | ||
2418 | =item panic: pad_free po | |
2419 | ||
2420 | (P) An invalid scratch pad offset was detected internally. | |
2421 | ||
2422 | =item panic: pad_reset curpad | |
2423 | ||
2424 | (P) The compiler got confused about which scratch pad it was allocating | |
2425 | and freeing temporaries and lexicals from. | |
2426 | ||
2427 | =item panic: pad_sv po | |
2428 | ||
2429 | (P) An invalid scratch pad offset was detected internally. | |
2430 | ||
2431 | =item panic: pad_swipe curpad | |
2432 | ||
2433 | (P) The compiler got confused about which scratch pad it was allocating | |
2434 | and freeing temporaries and lexicals from. | |
2435 | ||
2436 | =item panic: pad_swipe po | |
2437 | ||
2438 | (P) An invalid scratch pad offset was detected internally. | |
2439 | ||
2440 | =item panic: pp_iter | |
2441 | ||
2442 | (P) The foreach iterator got called in a non-loop context frame. | |
2443 | ||
2444 | =item panic: realloc | |
2445 | ||
2446 | (P) Something requested a negative number of bytes of realloc. | |
2447 | ||
2448 | =item panic: restartop | |
2449 | ||
2450 | (P) Some internal routine requested a goto (or something like it), and | |
2451 | didn't supply the destination. | |
2452 | ||
2453 | =item panic: return | |
2454 | ||
2455 | (P) We popped the context stack to a subroutine or eval context, and | |
2456 | then discovered it wasn't a subroutine or eval context. | |
2457 | ||
2458 | =item panic: scan_num | |
2459 | ||
2460 | (P) scan_num() got called on something that wasn't a number. | |
2461 | ||
2462 | =item panic: sv_insert | |
2463 | ||
2464 | (P) The sv_insert() routine was told to remove more string than there | |
2465 | was string. | |
2466 | ||
2467 | =item panic: top_env | |
2468 | ||
6224f72b | 2469 | (P) The compiler attempted to do a goto, or something weird like that. |
a0d0e21e LW |
2470 | |
2471 | =item panic: yylex | |
2472 | ||
2473 | (P) The lexer got into a bad state while processing a case modifier. | |
2474 | ||
7b8d334a | 2475 | =item Parentheses missing around "%s" list |
a0d0e21e | 2476 | |
e476b1b5 | 2477 | (W parenthesis) You said something like |
a0d0e21e LW |
2478 | |
2479 | my $foo, $bar = @_; | |
2480 | ||
2481 | when you meant | |
2482 | ||
2483 | my ($foo, $bar) = @_; | |
2484 | ||
54884818 | 2485 | Remember that "my", "our", and "local" bind tighter than comma. |
a0d0e21e | 2486 | |
75b44862 | 2487 | =item Perl %s required--this is only version %s, stopped |
a0d0e21e | 2488 | |
be771a83 GS |
2489 | (F) The module in question uses features of a version of Perl more |
2490 | recent than the currently running version. How long has it been since | |
2491 | you upgraded, anyway? See L<perlfunc/require>. | |
a0d0e21e | 2492 | |
6df41af2 GS |
2493 | =item PERL_SH_DIR too long |
2494 | ||
2495 | (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the | |
2496 | C<sh>-shell in. See "PERL_SH_DIR" in F<README.os2>. | |
2497 | ||
2498 | =item perl: warning: Setting locale failed. | |
2499 | ||
2500 | (S) The whole warning message will look something like: | |
2501 | ||
2502 | perl: warning: Setting locale failed. | |
2503 | perl: warning: Please check that your locale settings: | |
2504 | LC_ALL = "En_US", | |
2505 | LANG = (unset) | |
2506 | are supported and installed on your system. | |
2507 | perl: warning: Falling back to the standard locale ("C"). | |
2508 | ||
2509 | Exactly what were the failed locale settings varies. In the above the | |
2510 | settings were that the LC_ALL was "En_US" and the LANG had no value. | |
2511 | This error means that Perl detected that you and/or your system | |
2512 | administrator have set up the so-called variable system but Perl could | |
2513 | not use those settings. This was not dead serious, fortunately: there | |
be771a83 GS |
2514 | is a "default locale" called "C" that Perl can and will use, the script |
2515 | will be run. Before you really fix the problem, however, you will get | |
2516 | the same error message each time you run Perl. How to really fix the | |
2517 | problem can be found in L<perllocale> section B<LOCALE PROBLEMS>. | |
6df41af2 | 2518 | |
a0d0e21e LW |
2519 | =item Permission denied |
2520 | ||
2521 | (F) The setuid emulator in suidperl decided you were up to no good. | |
2522 | ||
bd3fa61c | 2523 | =item pid %x not a child |
748a9306 | 2524 | |
be771a83 GS |
2525 | (W exec) A warning peculiar to VMS. Waitpid() was asked to wait for a |
2526 | process which isn't a subprocess of the current process. While this is | |
2527 | fine from VMS' perspective, it's probably not what you intended. | |
748a9306 | 2528 | |
a0d0e21e LW |
2529 | =item POSIX getpgrp can't take an argument |
2530 | ||
81777298 | 2531 | (F) Your system has POSIX getpgrp(), which takes no argument, unlike |
a0d0e21e LW |
2532 | the BSD version, which takes a pid. |
2533 | ||
bbce6d69 | 2534 | =item Possible attempt to put comments in qw() list |
2535 | ||
e476b1b5 | 2536 | (W qw) qw() lists contain items separated by whitespace; as with literal |
75b44862 | 2537 | strings, comment characters are not ignored, but are instead treated as |
be771a83 GS |
2538 | literal data. (You may have used different delimiters than the |
2539 | parentheses shown here; braces are also frequently used.) | |
bbce6d69 | 2540 | |
774d564b | 2541 | You probably wrote something like this: |
2542 | ||
54310121 | 2543 | @list = qw( |
774d564b | 2544 | a # a comment |
bbce6d69 | 2545 | b # another comment |
774d564b | 2546 | ); |
bbce6d69 | 2547 | |
2548 | when you should have written this: | |
2549 | ||
774d564b | 2550 | @list = qw( |
54310121 | 2551 | a |
2552 | b | |
774d564b | 2553 | ); |
2554 | ||
2555 | If you really want comments, build your list the | |
2556 | old-fashioned way, with quotes and commas: | |
2557 | ||
2558 | @list = ( | |
2559 | 'a', # a comment | |
2560 | 'b', # another comment | |
2561 | ); | |
bbce6d69 | 2562 | |
2563 | =item Possible attempt to separate words with commas | |
2564 | ||
be771a83 GS |
2565 | (W qw) qw() lists contain items separated by whitespace; therefore |
2566 | commas aren't needed to separate the items. (You may have used | |
2567 | different delimiters than the parentheses shown here; braces are also | |
2568 | frequently used.) | |
bbce6d69 | 2569 | |
54310121 | 2570 | You probably wrote something like this: |
bbce6d69 | 2571 | |
774d564b | 2572 | qw! a, b, c !; |
2573 | ||
2574 | which puts literal commas into some of the list items. Write it without | |
2575 | commas if you don't want them to appear in your data: | |
bbce6d69 | 2576 | |
774d564b | 2577 | qw! a b c !; |
bbce6d69 | 2578 | |
a0d0e21e LW |
2579 | =item Possible memory corruption: %s overflowed 3rd argument |
2580 | ||
2581 | (F) An ioctl() or fcntl() returned more than Perl was bargaining for. | |
2582 | Perl guesses a reasonable buffer size, but puts a sentinel byte at the | |
2583 | end of the buffer just in case. This sentinel byte got clobbered, and | |
2584 | Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>. | |
2585 | ||
6df41af2 GS |
2586 | =item Possible Y2K bug: %s |
2587 | ||
2588 | (W y2k) You are concatenating the number 19 with another number, which | |
2589 | could be a potential Year 2000 problem. | |
2590 | ||
8cd79558 GS |
2591 | =item pragma "attrs" is deprecated, use "sub NAME : ATTRS" instead |
2592 | ||
4375e838 | 2593 | (W deprecated) You have written something like this: |
8cd79558 GS |
2594 | |
2595 | sub doit | |
2596 | { | |
2597 | use attrs qw(locked); | |
2598 | } | |
2599 | ||
2600 | You should use the new declaration syntax instead. | |
2601 | ||
2602 | sub doit : locked | |
2603 | { | |
2604 | ... | |
2605 | ||
2606 | The C<use attrs> pragma is now obsolete, and is only provided for | |
2607 | backward-compatibility. See L<perlsub/"Subroutine Attributes">. | |
2608 | ||
a0d0e21e LW |
2609 | =item Precedence problem: open %s should be open(%s) |
2610 | ||
e476b1b5 | 2611 | (S precedence) The old irregular construct |
cb1a09d0 | 2612 | |
a0d0e21e LW |
2613 | open FOO || die; |
2614 | ||
2615 | is now misinterpreted as | |
2616 | ||
2617 | open(FOO || die); | |
2618 | ||
be771a83 GS |
2619 | because of the strict regularization of Perl 5's grammar into unary and |
2620 | list operators. (The old open was a little of both.) You must put | |
2621 | parentheses around the filehandle, or use the new "or" operator instead | |
2622 | of "||". | |
a0d0e21e | 2623 | |
3cdd684c TP |
2624 | =item Premature end of script headers |
2625 | ||
2626 | See Server error. | |
2627 | ||
6df41af2 GS |
2628 | =item printf() on closed filehandle %s |
2629 | ||
be771a83 GS |
2630 | (W closed) The filehandle you're writing to got itself closed sometime |
2631 | before now. Check your logic flow. | |
6df41af2 | 2632 | |
9a7dcd9c | 2633 | =item print() on closed filehandle %s |
a0d0e21e | 2634 | |
be771a83 GS |
2635 | (W closed) The filehandle you're printing on got itself closed sometime |
2636 | before now. Check your logic flow. | |
a0d0e21e | 2637 | |
6df41af2 | 2638 | =item Process terminated by SIG%s |
a0d0e21e | 2639 | |
6df41af2 GS |
2640 | (W) This is a standard message issued by OS/2 applications, while *nix |
2641 | applications die in silence. It is considered a feature of the OS/2 | |
2642 | port. One can easily disable this by appropriate sighandlers, see | |
2643 | L<perlipc/"Signals">. See also "Process terminated by SIGTERM/SIGINT" | |
2644 | in F<README.os2>. | |
a0d0e21e | 2645 | |
3fe9a6f1 | 2646 | =item Prototype mismatch: %s vs %s |
4633a7c4 | 2647 | |
be771a83 GS |
2648 | (S unsafe) The subroutine being declared or defined had previously been |
2649 | declared or defined with a different function prototype. | |
4633a7c4 | 2650 | |
89ea2908 GA |
2651 | =item Range iterator outside integer range |
2652 | ||
2653 | (F) One (or both) of the numeric arguments to the range operator ".." | |
2654 | are outside the range which can be represented by integers internally. | |
be771a83 GS |
2655 | One possible workaround is to force Perl to use magical string increment |
2656 | by prepending "0" to your numbers. | |
89ea2908 | 2657 | |
9a7dcd9c | 2658 | =item readline() on closed filehandle %s |
a0d0e21e | 2659 | |
75b44862 GS |
2660 | (W closed) The filehandle you're reading from got itself closed sometime |
2661 | before now. Check your logic flow. | |
a0d0e21e | 2662 | |
6df41af2 GS |
2663 | =item Reallocation too large: %lx |
2664 | ||
2665 | (F) You can't allocate more than 64K on an MS-DOS machine. | |
2666 | ||
4ad56ec9 IZ |
2667 | =item realloc() of freed memory ignored |
2668 | ||
be771a83 GS |
2669 | (S malloc) An internal routine called realloc() on something that had |
2670 | already been freed. | |
4ad56ec9 | 2671 | |
a0d0e21e LW |
2672 | =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch |
2673 | ||
be771a83 GS |
2674 | (F debugging) You can't use the B<-D> option unless the code to produce |
2675 | the desired output is compiled into Perl, which entails some overhead, | |
a0d0e21e LW |
2676 | which is why it's currently left out of your copy. |
2677 | ||
3e0ccd42 | 2678 | =item Recursive inheritance detected in package '%s' |
a0d0e21e LW |
2679 | |
2680 | (F) More than 100 levels of inheritance were used. Probably indicates | |
2681 | an unintended loop in your inheritance hierarchy. | |
2682 | ||
3e0ccd42 JP |
2683 | =item Recursive inheritance detected while looking for method '%s' in package '%s' |
2684 | ||
be771a83 GS |
2685 | (F) More than 100 levels of inheritance were encountered while invoking |
2686 | a method. Probably indicates an unintended loop in your inheritance | |
2687 | hierarchy. | |
3e0ccd42 | 2688 | |
1930e939 TP |
2689 | =item Reference found where even-sized list expected |
2690 | ||
be771a83 GS |
2691 | (W misc) You gave a single reference where Perl was expecting a list |
2692 | with an even number of elements (for assignment to a hash). This usually | |
2693 | means that you used the anon hash constructor when you meant to use | |
2694 | parens. In any case, a hash requires key/value B<pairs>. | |
7b8d334a GS |
2695 | |
2696 | %hash = { one => 1, two => 2, }; # WRONG | |
2697 | %hash = [ qw/ an anon array / ]; # WRONG | |
2698 | %hash = ( one => 1, two => 2, ); # right | |
2699 | %hash = qw( one 1 two 2 ); # also fine | |
2700 | ||
810b8aa5 GS |
2701 | =item Reference is already weak |
2702 | ||
e476b1b5 | 2703 | (W misc) You have attempted to weaken a reference that is already weak. |
810b8aa5 GS |
2704 | Doing so has no effect. |
2705 | ||
a0d0e21e LW |
2706 | =item Reference miscount in sv_replace() |
2707 | ||
be771a83 GS |
2708 | (W internal) The internal sv_replace() function was handed a new SV with |
2709 | a reference count of other than 1. | |
a0d0e21e LW |
2710 | |
2711 | =item regexp memory corruption | |
2712 | ||
2713 | (P) The regular expression engine got confused by what the regular | |
2714 | expression compiler gave it. | |
2715 | ||
6df41af2 GS |
2716 | =item regexp *+ operand could be empty |
2717 | ||
be771a83 GS |
2718 | (F) The part of the regexp subject to either the * or + quantifier could |
2719 | match an empty string. | |
6df41af2 | 2720 | |
a0d0e21e LW |
2721 | =item regexp out of space |
2722 | ||
be771a83 GS |
2723 | (P) A "can't happen" error, because safemalloc() should have caught it |
2724 | earlier. | |
a0d0e21e | 2725 | |
7a95317d GS |
2726 | =item Repeat count in pack overflows |
2727 | ||
be771a83 GS |
2728 | (F) You can't specify a repeat count so large that it overflows your |
2729 | signed integers. See L<perlfunc/pack>. | |
7a95317d GS |
2730 | |
2731 | =item Repeat count in unpack overflows | |
2732 | ||
be771a83 GS |
2733 | (F) You can't specify a repeat count so large that it overflows your |
2734 | signed integers. See L<perlfunc/unpack>. | |
7a95317d | 2735 | |
a0d0e21e LW |
2736 | =item Reversed %s= operator |
2737 | ||
be771a83 GS |
2738 | (W syntax) You wrote your assignment operator backwards. The = must |
2739 | always comes last, to avoid ambiguity with subsequent unary operators. | |
a0d0e21e LW |
2740 | |
2741 | =item Runaway format | |
2742 | ||
2743 | (F) Your format contained the ~~ repeat-until-blank sequence, but it | |
2744 | produced 200 lines at once, and the 200th line looked exactly like the | |
2745 | 199th line. Apparently you didn't arrange for the arguments to exhaust | |
2746 | themselves, either by using ^ instead of @ (for scalar variables), or by | |
2747 | shifting or popping (for array variables). See L<perlform>. | |
2748 | ||
2749 | =item Scalar value @%s[%s] better written as $%s[%s] | |
2750 | ||
be771a83 GS |
2751 | (W syntax) You've used an array slice (indicated by @) to select a |
2752 | single element of an array. Generally it's better to ask for a scalar | |
2753 | value (indicated by $). The difference is that C<$foo[&bar]> always | |
2754 | behaves like a scalar, both when assigning to it and when evaluating its | |
2755 | argument, while C<@foo[&bar]> behaves like a list when you assign to it, | |
2756 | and provides a list context to its subscript, which can do weird things | |
2757 | if you're expecting only one subscript. | |
a0d0e21e | 2758 | |
748a9306 | 2759 | On the other hand, if you were actually hoping to treat the array |
5f05dabc | 2760 | element as a list, you need to look into how references work, because |
748a9306 LW |
2761 | Perl will not magically convert between scalars and lists for you. See |
2762 | L<perlref>. | |
2763 | ||
a6006777 | 2764 | =item Scalar value @%s{%s} better written as $%s{%s} |
2765 | ||
75b44862 | 2766 | (W syntax) You've used a hash slice (indicated by @) to select a single |
be771a83 GS |
2767 | element of a hash. Generally it's better to ask for a scalar value |
2768 | (indicated by $). The difference is that C<$foo{&bar}> always behaves | |
2769 | like a scalar, both when assigning to it and when evaluating its | |
2770 | argument, while C<@foo{&bar}> behaves like a list when you assign to it, | |
2771 | and provides a list context to its subscript, which can do weird things | |
2772 | if you're expecting only one subscript. | |
2773 | ||
2774 | On the other hand, if you were actually hoping to treat the hash element | |
2775 | as a list, you need to look into how references work, because Perl will | |
2776 | not magically convert between scalars and lists for you. See | |
a6006777 | 2777 | L<perlref>. |
2778 | ||
a0d0e21e LW |
2779 | =item Script is not setuid/setgid in suidperl |
2780 | ||
54310121 | 2781 | (F) Oddly, the suidperl program was invoked on a script without a setuid |
2782 | or setgid bit set. This doesn't make much sense. | |
a0d0e21e LW |
2783 | |
2784 | =item Search pattern not terminated | |
2785 | ||
2786 | (F) The lexer couldn't find the final delimiter of a // or m{} | |
2787 | construct. Remember that bracketing delimiters count nesting level. | |
fb73857a | 2788 | Missing the leading C<$> from a variable C<$m> may cause this error. |
a0d0e21e | 2789 | |
96e4d5b1 | 2790 | =item %sseek() on unopened file |
a0d0e21e | 2791 | |
be771a83 GS |
2792 | (W unopened) You tried to use the seek() or sysseek() function on a |
2793 | filehandle that was either never opened or has since been closed. | |
a0d0e21e LW |
2794 | |
2795 | =item select not implemented | |
2796 | ||
2797 | (F) This machine doesn't implement the select() system call. | |
2798 | ||
6df41af2 | 2799 | =item Semicolon seems to be missing |
a0d0e21e | 2800 | |
75b44862 GS |
2801 | (W semicolon) A nearby syntax error was probably caused by a missing |
2802 | semicolon, or possibly some other missing operator, such as a comma. | |
a0d0e21e LW |
2803 | |
2804 | =item semi-panic: attempt to dup freed string | |
2805 | ||
be771a83 GS |
2806 | (S internal) The internal newSVsv() routine was called to duplicate a |
2807 | scalar that had previously been marked as free. | |
a0d0e21e | 2808 | |
6df41af2 | 2809 | =item sem%s not implemented |
a0d0e21e | 2810 | |
6df41af2 | 2811 | (F) You don't have System V semaphore IPC on your system. |
a0d0e21e | 2812 | |
69282e91 | 2813 | =item send() on closed socket %s |
a0d0e21e | 2814 | |
be771a83 GS |
2815 | (W closed) The socket you're sending to got itself closed sometime |
2816 | before now. Check your logic flow. | |
a0d0e21e | 2817 | |
1b1626e4 | 2818 | =item Sequence (? incomplete |
7b8d334a | 2819 | |
be771a83 GS |
2820 | (F) A regular expression ended with an incomplete extension (?. See |
2821 | L<perlre>. | |
1b1626e4 | 2822 | |
a0d0e21e LW |
2823 | =item Sequence (?%s...) not implemented |
2824 | ||
2825 | (F) A proposed regular expression extension has the character reserved | |
2826 | but has not yet been written. See L<perlre>. | |
2827 | ||
2828 | =item Sequence (?%s...) not recognized | |
2829 | ||
2830 | (F) You used a regular expression extension that doesn't make sense. | |
2831 | See L<perlre>. | |
2832 | ||
6df41af2 GS |
2833 | =item Sequence (?#... not terminated |
2834 | ||
2835 | (F) A regular expression comment must be terminated by a closing | |
2836 | parenthesis. Embedded parentheses aren't allowed. See L<perlre>. | |
2837 | ||
2838 | =item 500 Server error | |
2839 | ||
2840 | See Server error. | |
2841 | ||
a5f75d66 AD |
2842 | =item Server error |
2843 | ||
3cdd684c | 2844 | This is the error message generally seen in a browser window when trying |
be771a83 GS |
2845 | to run a CGI program (including SSI) over the web. The actual error text |
2846 | varies widely from server to server. The most frequently-seen variants | |
2847 | are "500 Server error", "Method (something) not permitted", "Document | |
2848 | contains no data", "Premature end of script headers", and "Did not | |
2849 | produce a valid header". | |
9607fc9c | 2850 | |
2851 | B<This is a CGI error, not a Perl error>. | |
2852 | ||
be771a83 GS |
2853 | You need to make sure your script is executable, is accessible by the |
2854 | user CGI is running the script under (which is probably not the user | |
2855 | account you tested it under), does not rely on any environment variables | |
2856 | (like PATH) from the user it isn't running under, and isn't in a | |
2857 | location where the CGI server can't find it, basically, more or less. | |
2858 | Please see the following for more information: | |
9607fc9c | 2859 | |
be94a901 GS |
2860 | http://www.perl.com/CPAN/doc/FAQs/cgi/idiots-guide.html |
2861 | http://www.perl.com/CPAN/doc/FAQs/cgi/perl-cgi-faq.html | |
9607fc9c | 2862 | ftp://rtfm.mit.edu/pub/usenet/news.answers/www/cgi-faq |
2863 | http://hoohoo.ncsa.uiuc.edu/cgi/interface.html | |
2864 | http://www-genome.wi.mit.edu/WWW/faqs/www-security-faq.html | |
a5f75d66 | 2865 | |
be94a901 GS |
2866 | You should also look at L<perlfaq9>. |
2867 | ||
a0d0e21e LW |
2868 | =item setegid() not implemented |
2869 | ||
be771a83 GS |
2870 | (F) You tried to assign to C<$)>, and your operating system doesn't |
2871 | support the setegid() system call (or equivalent), or at least Configure | |
2872 | didn't think so. | |
a0d0e21e LW |
2873 | |
2874 | =item seteuid() not implemented | |
2875 | ||
be771a83 GS |
2876 | (F) You tried to assign to C<< $> >>, and your operating system doesn't |
2877 | support the seteuid() system call (or equivalent), or at least Configure | |
2878 | didn't think so. | |
a0d0e21e | 2879 | |
81777298 GS |
2880 | =item setpgrp can't take arguments |
2881 | ||
be771a83 GS |
2882 | (F) Your system has the setpgrp() from BSD 4.2, which takes no |
2883 | arguments, unlike POSIX setpgid(), which takes a process ID and process | |
2884 | group ID. | |
81777298 | 2885 | |
a0d0e21e LW |
2886 | =item setrgid() not implemented |
2887 | ||
be771a83 GS |
2888 | (F) You tried to assign to C<$(>, and your operating system doesn't |
2889 | support the setrgid() system call (or equivalent), or at least Configure | |
2890 | didn't think so. | |
a0d0e21e LW |
2891 | |
2892 | =item setruid() not implemented | |
2893 | ||
be771a83 GS |
2894 | (F) You tried to assign to C<$<>, and your operating system doesn't |
2895 | support the setruid() system call (or equivalent), or at least Configure | |
2896 | didn't think so. | |
a0d0e21e | 2897 | |
6df41af2 GS |
2898 | =item setsockopt() on closed socket %s |
2899 | ||
be771a83 GS |
2900 | (W closed) You tried to set a socket option on a closed socket. Did you |
2901 | forget to check the return value of your socket() call? See | |
6df41af2 GS |
2902 | L<perlfunc/setsockopt>. |
2903 | ||
a0d0e21e LW |
2904 | =item Setuid/gid script is writable by world |
2905 | ||
be771a83 GS |
2906 | (F) The setuid emulator won't run a script that is writable by the |
2907 | world, because the world might have written on it already. | |
a0d0e21e LW |
2908 | |
2909 | =item shm%s not implemented | |
2910 | ||
2911 | (F) You don't have System V shared memory IPC on your system. | |
2912 | ||
6df41af2 GS |
2913 | =item <> should be quotes |
2914 | ||
2915 | (F) You wrote C<< require <file> >> when you should have written | |
2916 | C<require 'file'>. | |
2917 | ||
2918 | =item /%s/ should probably be written as "%s" | |
2919 | ||
2920 | (W syntax) You have used a pattern where Perl expected to find a string, | |
be771a83 GS |
2921 | as in the first argument to C<join>. Perl will treat the true or false |
2922 | result of matching the pattern against $_ as the string, which is | |
2923 | probably not what you had in mind. | |
6df41af2 | 2924 | |
69282e91 | 2925 | =item shutdown() on closed socket %s |
a0d0e21e | 2926 | |
75b44862 GS |
2927 | (W closed) You tried to do a shutdown on a closed socket. Seems a bit |
2928 | superfluous. | |
a0d0e21e | 2929 | |
f86702cc | 2930 | =item SIG%s handler "%s" not defined |
a0d0e21e | 2931 | |
be771a83 GS |
2932 | (W signal) The signal handler named in %SIG doesn't, in fact, exist. |
2933 | Perhaps you put it into the wrong package? | |
a0d0e21e LW |
2934 | |
2935 | =item sort is now a reserved word | |
2936 | ||
2937 | (F) An ancient error message that almost nobody ever runs into anymore. | |
2938 | But before sort was a keyword, people sometimes used it as a filehandle. | |
2939 | ||
2940 | =item Sort subroutine didn't return a numeric value | |
2941 | ||
2942 | (F) A sort comparison routine must return a number. You probably blew | |
c47ff5f1 | 2943 | it by not using C<< <=> >> or C<cmp>, or by not using them correctly. |
a0d0e21e LW |
2944 | See L<perlfunc/sort>. |
2945 | ||
2946 | =item Sort subroutine didn't return single value | |
2947 | ||
2948 | (F) A sort comparison subroutine may not return a list value with more | |
2949 | or less than one element. See L<perlfunc/sort>. | |
2950 | ||
2951 | =item Split loop | |
2952 | ||
be771a83 GS |
2953 | (P) The split was looping infinitely. (Obviously, a split shouldn't |
2954 | iterate more times than there are characters of input, which is what | |
2955 | happened.) See L<perlfunc/split>. | |
a0d0e21e | 2956 | |
a0d0e21e LW |
2957 | =item Statement unlikely to be reached |
2958 | ||
be771a83 GS |
2959 | (W exec) You did an exec() with some statement after it other than a |
2960 | die(). This is almost always an error, because exec() never returns | |
2961 | unless there was a failure. You probably wanted to use system() | |
2962 | instead, which does return. To suppress this warning, put the exec() in | |
2963 | a block by itself. | |
a0d0e21e | 2964 | |
6df41af2 GS |
2965 | =item Stat on unopened file <%s> |
2966 | ||
be771a83 GS |
2967 | (W unopened) You tried to use the stat() function (or an equivalent file |
2968 | test) on a filehandle that was either never opened or has since been | |
2969 | closed. | |
6df41af2 | 2970 | |
17feb5d5 DD |
2971 | =item Strange *+?{} on zero-length expression |
2972 | ||
be771a83 GS |
2973 | (W regexp) You applied a regular expression quantifier in a place where |
2974 | it makes no sense, such as on a zero-width assertion. Try putting the | |
2975 | quantifier inside the assertion instead. For example, the way to match | |
2976 | "abc" provided that it is followed by three repetitions of "xyz" is | |
2977 | C</abc(?=(?:xyz){3})/>, not C</abc(?=xyz){3}/>. | |
17feb5d5 | 2978 | |
e7ea3e70 IZ |
2979 | =item Stub found while resolving method `%s' overloading `%s' in package `%s' |
2980 | ||
be771a83 GS |
2981 | (P) Overloading resolution over @ISA tree may be broken by importation |
2982 | stubs. Stubs should never be implicitly created, but explicit calls to | |
2983 | C<can> may break this. | |
e7ea3e70 | 2984 | |
a0d0e21e LW |
2985 | =item Subroutine %s redefined |
2986 | ||
e476b1b5 | 2987 | (W redefine) You redefined a subroutine. To suppress this warning, say |
a0d0e21e LW |
2988 | |
2989 | { | |
4438c4b7 | 2990 | no warnings; |
a0d0e21e LW |
2991 | eval "sub name { ... }"; |
2992 | } | |
2993 | ||
2994 | =item Substitution loop | |
2995 | ||
be771a83 GS |
2996 | (P) The substitution was looping infinitely. (Obviously, a substitution |
2997 | shouldn't iterate more times than there are characters of input, which | |
2998 | is what happened.) See the discussion of substitution in | |
5f05dabc | 2999 | L<perlop/"Quote and Quote-like Operators">. |
a0d0e21e LW |
3000 | |
3001 | =item Substitution pattern not terminated | |
3002 | ||
3003 | (F) The lexer couldn't find the interior delimiter of a s/// or s{}{} | |
3004 | construct. Remember that bracketing delimiters count nesting level. | |
fb73857a | 3005 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
3006 | |
3007 | =item Substitution replacement not terminated | |
3008 | ||
3009 | (F) The lexer couldn't find the final delimiter of a s/// or s{}{} | |
3010 | construct. Remember that bracketing delimiters count nesting level. | |
fb73857a | 3011 | Missing the leading C<$> from variable C<$s> may cause this error. |
a0d0e21e LW |
3012 | |
3013 | =item substr outside of string | |
3014 | ||
be771a83 GS |
3015 | (W substr),(F) You tried to reference a substr() that pointed outside of |
3016 | a string. That is, the absolute value of the offset was larger than the | |
3017 | length of the string. See L<perlfunc/substr>. This warning is fatal if | |
3018 | substr is used in an lvalue context (as the left hand side of an | |
3019 | assignment or as a subroutine argument for example). | |
a0d0e21e | 3020 | |
f86702cc | 3021 | =item suidperl is no longer needed since %s |
a0d0e21e | 3022 | |
be771a83 GS |
3023 | (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but |
3024 | a version of the setuid emulator somehow got run anyway. | |
a0d0e21e | 3025 | |
85ab1d1d JH |
3026 | =item switching effective %s is not implemented |
3027 | ||
be771a83 GS |
3028 | (F) While under the C<use filetest> pragma, we cannot switch the real |
3029 | and effective uids or gids. | |
85ab1d1d | 3030 | |
a0d0e21e LW |
3031 | =item syntax error |
3032 | ||
3033 | (F) Probably means you had a syntax error. Common reasons include: | |
3034 | ||
3035 | A keyword is misspelled. | |
3036 | A semicolon is missing. | |
3037 | A comma is missing. | |
3038 | An opening or closing parenthesis is missing. | |
3039 | An opening or closing brace is missing. | |
3040 | A closing quote is missing. | |
3041 | ||
3042 | Often there will be another error message associated with the syntax | |
3043 | error giving more information. (Sometimes it helps to turn on B<-w>.) | |
3044 | The error message itself often tells you where it was in the line when | |
3045 | it decided to give up. Sometimes the actual error is several tokens | |
5f05dabc | 3046 | before this, because Perl is good at understanding random input. |
a0d0e21e LW |
3047 | Occasionally the line number may be misleading, and once in a blue moon |
3048 | the only way to figure out what's triggering the error is to call | |
3049 | C<perl -c> repeatedly, chopping away half the program each time to see | |
be771a83 GS |
3050 | if the error went away. Sort of the cybernetic version of S<20 |
3051 | questions>. | |
a0d0e21e | 3052 | |
cb1a09d0 AD |
3053 | =item syntax error at line %d: `%s' unexpected |
3054 | ||
be771a83 GS |
3055 | (A) You've accidentally run your script through the Bourne shell instead |
3056 | of Perl. Check the #! line, or manually feed your script into Perl | |
3057 | yourself. | |
cb1a09d0 | 3058 | |
6df41af2 GS |
3059 | =item %s syntax OK |
3060 | ||
3061 | (F) The final summary message when a C<perl -c> succeeds. | |
3062 | ||
6087ac44 | 3063 | =item System V %s is not implemented on this machine |
a0d0e21e | 3064 | |
6087ac44 JH |
3065 | (F) You tried to do something with a function beginning with "sem", |
3066 | "shm", or "msg" but that System V IPC is not implemented in your | |
3067 | machine. In some machines the functionality can exist but be | |
3068 | unconfigured. Consult your system support. | |
a0d0e21e | 3069 | |
69282e91 | 3070 | =item syswrite() on closed filehandle %s |
a0d0e21e | 3071 | |
be771a83 GS |
3072 | (W closed) The filehandle you're writing to got itself closed sometime |
3073 | before now. Check your logic flow. | |
a0d0e21e | 3074 | |
fc36a67e | 3075 | =item Target of goto is too deeply nested |
3076 | ||
be771a83 GS |
3077 | (F) You tried to use C<goto> to reach a label that was too deeply nested |
3078 | for Perl to reach. Perl is doing you a favor by refusing. | |
fc36a67e | 3079 | |
8903cb82 | 3080 | =item tell() on unopened file |
a0d0e21e | 3081 | |
be771a83 GS |
3082 | (W unopened) You tried to use the tell() function on a filehandle that |
3083 | was either never opened or has since been closed. | |
a0d0e21e | 3084 | |
c47ff5f1 | 3085 | =item Test on unopened file <%s> |
a0d0e21e | 3086 | |
be771a83 GS |
3087 | (W unopened) You tried to invoke a file test operator on a filehandle |
3088 | that isn't open. Check your logic. See also L<perlfunc/-X>. | |
a0d0e21e LW |
3089 | |
3090 | =item That use of $[ is unsupported | |
3091 | ||
be771a83 GS |
3092 | (F) Assignment to C<$[> is now strictly circumscribed, and interpreted |
3093 | as a compiler directive. You may say only one of | |
a0d0e21e LW |
3094 | |
3095 | $[ = 0; | |
3096 | $[ = 1; | |
3097 | ... | |
3098 | local $[ = 0; | |
3099 | local $[ = 1; | |
3100 | ... | |
3101 | ||
be771a83 GS |
3102 | This is to prevent the problem of one module changing the array base out |
3103 | from under another module inadvertently. See L<perlvar/$[>. | |
a0d0e21e | 3104 | |
f86702cc | 3105 | =item The crypt() function is unimplemented due to excessive paranoia |
a0d0e21e LW |
3106 | |
3107 | (F) Configure couldn't find the crypt() function on your machine, | |
3108 | probably because your vendor didn't supply it, probably because they | |
8b1a09fc | 3109 | think the U.S. Government thinks it's a secret, or at least that they |
a0d0e21e LW |
3110 | will continue to pretend that it is. And if you quote me on that, I |
3111 | will deny it. | |
3112 | ||
6df41af2 GS |
3113 | =item The %s function is unimplemented |
3114 | ||
3115 | The function indicated isn't implemented on this architecture, according | |
3116 | to the probings of Configure. | |
3117 | ||
a0d0e21e LW |
3118 | =item The stat preceding C<-l _> wasn't an lstat |
3119 | ||
be771a83 GS |
3120 | (F) It makes no sense to test the current stat buffer for symbolic |
3121 | linkhood if the last stat that wrote to the stat buffer already went | |
3122 | past the symlink to get to the real file. Use an actual filename | |
3123 | instead. | |
a0d0e21e | 3124 | |
437784d6 | 3125 | =item This Perl can't reset CRTL environ elements (%s) |
f675dbe5 CB |
3126 | |
3127 | =item This Perl can't set CRTL environ elements (%s=%s) | |
3128 | ||
75b44862 | 3129 | (W internal) Warnings peculiar to VMS. You tried to change or delete an |
be771a83 GS |
3130 | element of the CRTL's internal environ array, but your copy of Perl |
3131 | wasn't built with a CRTL that contained the setenv() function. You'll | |
3132 | need to rebuild Perl with a CRTL that does, or redefine | |
3133 | F<PERL_ENV_TABLES> (see L<perlvms>) so that the environ array isn't the | |
3134 | target of the change to | |
f675dbe5 CB |
3135 | %ENV which produced the warning. |
3136 | ||
a0d0e21e LW |
3137 | =item times not implemented |
3138 | ||
be771a83 GS |
3139 | (F) Your version of the C library apparently doesn't do times(). I |
3140 | suspect you're not running on Unix. | |
a0d0e21e LW |
3141 | |
3142 | =item Too few args to syscall | |
3143 | ||
3144 | (F) There has to be at least one argument to syscall() to specify the | |
3145 | system call to call, silly dilly. | |
3146 | ||
9607fc9c | 3147 | =item Too late for "B<-T>" option |
3148 | ||
3149 | (X) The #! line (or local equivalent) in a Perl script contains the | |
8cc95fdb | 3150 | B<-T> option, but Perl was not invoked with B<-T> in its command line. |
3151 | This is an error because, by the time Perl discovers a B<-T> in a | |
3152 | script, it's too late to properly taint everything from the environment. | |
3153 | So Perl gives up. | |
f86702cc | 3154 | |
9607fc9c | 3155 | If the Perl script is being executed as a command using the #! |
be771a83 GS |
3156 | mechanism (or its local equivalent), this error can usually be fixed by |
3157 | editing the #! line so that the B<-T> option is a part of Perl's first | |
3158 | argument: e.g. change C<perl -n -T> to C<perl -T -n>. | |
f86702cc | 3159 | |
9607fc9c | 3160 | If the Perl script is being executed as C<perl scriptname>, then the |
3161 | B<-T> option must appear on the command line: C<perl -T scriptname>. | |
f86702cc | 3162 | |
8cc95fdb | 3163 | =item Too late for "-%s" option |
3164 | ||
3165 | (X) The #! line (or local equivalent) in a Perl script contains the | |
3166 | B<-M> or B<-m> option. This is an error because B<-M> and B<-m> options | |
3167 | are not intended for use inside scripts. Use the C<use> pragma instead. | |
3168 | ||
ddda08b7 GS |
3169 | =item Too late to run %s block |
3170 | ||
3171 | (W void) A CHECK or INIT block is being defined during run time proper, | |
3172 | when the opportunity to run them has already passed. Perhaps you are | |
be771a83 GS |
3173 | loading a file with C<require> or C<do> when you should be using C<use> |
3174 | instead. Or perhaps you should put the C<require> or C<do> inside a | |
3175 | BEGIN block. | |
ddda08b7 | 3176 | |
a0d0e21e LW |
3177 | =item Too many args to syscall |
3178 | ||
5f05dabc | 3179 | (F) Perl supports a maximum of only 14 args to syscall(). |
a0d0e21e LW |
3180 | |
3181 | =item Too many arguments for %s | |
3182 | ||
3183 | (F) The function requires fewer arguments than you specified. | |
3184 | ||
6df41af2 GS |
3185 | =item Too many )'s |
3186 | ||
be771a83 GS |
3187 | (A) You've accidentally run your script through B<csh> instead of Perl. |
3188 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 GS |
3189 | |
3190 | =item Too many ('s | |
3191 | ||
a0d0e21e LW |
3192 | =item trailing \ in regexp |
3193 | ||
be771a83 GS |
3194 | (F) The regular expression ends with an unbackslashed backslash. |
3195 | Backslash it. See L<perlre>. | |
a0d0e21e | 3196 | |
2c268ad5 | 3197 | =item Transliteration pattern not terminated |
a0d0e21e LW |
3198 | |
3199 | (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] | |
fb73857a | 3200 | or y/// or y[][] construct. Missing the leading C<$> from variables |
3201 | C<$tr> or C<$y> may cause this error. | |
a0d0e21e | 3202 | |
2c268ad5 | 3203 | =item Transliteration replacement not terminated |
a0d0e21e LW |
3204 | |
3205 | (F) The lexer couldn't find the final delimiter of a tr/// or tr[][] | |
3206 | construct. | |
3207 | ||
3208 | =item truncate not implemented | |
3209 | ||
3210 | (F) Your machine doesn't implement a file truncation mechanism that | |
3211 | Configure knows about. | |
3212 | ||
3213 | =item Type of arg %d to %s must be %s (not %s) | |
3214 | ||
3215 | (F) This function requires the argument in that position to be of a | |
8b1a09fc | 3216 | certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be |
3217 | %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the | |
a0d0e21e LW |
3218 | {EXPR} forms as an explicit dereference. See L<perlref>. |
3219 | ||
3220 | =item umask: argument is missing initial 0 | |
3221 | ||
e476b1b5 | 3222 | (W umask) A umask of 222 is incorrect. It should be 0222, because octal |
eec2d3df GS |
3223 | literals always start with 0 in Perl, as in C. |
3224 | ||
3225 | =item umask not implemented | |
3226 | ||
be771a83 GS |
3227 | (F) Your machine doesn't implement the umask function and you tried to |
3228 | use it to restrict permissions for yourself (EXPR & 0700). | |
a0d0e21e | 3229 | |
4633a7c4 LW |
3230 | =item Unable to create sub named "%s" |
3231 | ||
3232 | (F) You attempted to create or access a subroutine with an illegal name. | |
3233 | ||
a0d0e21e LW |
3234 | =item Unbalanced context: %d more PUSHes than POPs |
3235 | ||
be771a83 GS |
3236 | (W internal) The exit code detected an internal inconsistency in how |
3237 | many execution contexts were entered and left. | |
a0d0e21e LW |
3238 | |
3239 | =item Unbalanced saves: %d more saves than restores | |
3240 | ||
be771a83 GS |
3241 | (W internal) The exit code detected an internal inconsistency in how |
3242 | many values were temporarily localized. | |
a0d0e21e LW |
3243 | |
3244 | =item Unbalanced scopes: %d more ENTERs than LEAVEs | |
3245 | ||
be771a83 GS |
3246 | (W internal) The exit code detected an internal inconsistency in how |
3247 | many blocks were entered and left. | |
a0d0e21e LW |
3248 | |
3249 | =item Unbalanced tmps: %d more allocs than frees | |
3250 | ||
be771a83 GS |
3251 | (W internal) The exit code detected an internal inconsistency in how |
3252 | many mortal scalars were allocated and freed. | |
a0d0e21e LW |
3253 | |
3254 | =item Undefined format "%s" called | |
3255 | ||
3256 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
3257 | another package? See L<perlform>. | |
3258 | ||
3259 | =item Undefined sort subroutine "%s" called | |
3260 | ||
be771a83 GS |
3261 | (F) The sort comparison routine specified doesn't seem to exist. |
3262 | Perhaps it's in a different package? See L<perlfunc/sort>. | |
a0d0e21e LW |
3263 | |
3264 | =item Undefined subroutine &%s called | |
3265 | ||
be771a83 GS |
3266 | (F) The subroutine indicated hasn't been defined, or if it was, it has |
3267 | since been undefined. | |
a0d0e21e LW |
3268 | |
3269 | =item Undefined subroutine called | |
3270 | ||
3271 | (F) The anonymous subroutine you're trying to call hasn't been defined, | |
3272 | or if it was, it has since been undefined. | |
3273 | ||
3274 | =item Undefined subroutine in sort | |
3275 | ||
be771a83 GS |
3276 | (F) The sort comparison routine specified is declared but doesn't seem |
3277 | to have been defined yet. See L<perlfunc/sort>. | |
a0d0e21e | 3278 | |
4633a7c4 LW |
3279 | =item Undefined top format "%s" called |
3280 | ||
3281 | (F) The format indicated doesn't seem to exist. Perhaps it's really in | |
3282 | another package? See L<perlform>. | |
3283 | ||
20408e3c GS |
3284 | =item Undefined value assigned to typeglob |
3285 | ||
be771a83 GS |
3286 | (W misc) An undefined value was assigned to a typeglob, a la |
3287 | C<*foo = undef>. This does nothing. It's possible that you really mean | |
3288 | C<undef *foo>. | |
20408e3c | 3289 | |
6df41af2 GS |
3290 | =item %s: Undefined variable |
3291 | ||
be771a83 GS |
3292 | (A) You've accidentally run your script through B<csh> instead of Perl. |
3293 | Check the #! line, or manually feed your script into Perl yourself. | |
6df41af2 | 3294 | |
a0d0e21e LW |
3295 | =item unexec of %s into %s failed! |
3296 | ||
3297 | (F) The unexec() routine failed for some reason. See your local FSF | |
3298 | representative, who probably put it there in the first place. | |
3299 | ||
3300 | =item Unknown BYTEORDER | |
3301 | ||
be771a83 GS |
3302 | (F) There are no byte-swapping functions for a machine with this byte |
3303 | order. | |
a0d0e21e | 3304 | |
6170680b IZ |
3305 | =item Unknown open() mode '%s' |
3306 | ||
437784d6 | 3307 | (F) The second argument of 3-argument open() is not among the list |
c47ff5f1 GS |
3308 | of valid modes: C<< < >>, C<< > >>, C<<< >> >>>, C<< +< >>, |
3309 | C<< +> >>, C<<< +>> >>>, C<-|>, C<|->. | |
6170680b | 3310 | |
f675dbe5 CB |
3311 | =item Unknown process %x sent message to prime_env_iter: %s |
3312 | ||
3313 | (P) An error peculiar to VMS. Perl was reading values for %ENV before | |
3314 | iterating over it, and someone else stuck a message in the stream of | |
3315 | data Perl expected. Someone's very confused, or perhaps trying to | |
3316 | subvert Perl's population of %ENV for nefarious purposes. | |
3317 | ||
6df41af2 GS |
3318 | =item unmatched [] in regexp |
3319 | ||
3320 | (F) The brackets around a character class must match. If you wish to | |
be771a83 GS |
3321 | include a closing bracket in a character class, backslash it or put it |
3322 | first. See L<perlre>. | |
6df41af2 | 3323 | |
a0d0e21e LW |
3324 | =item unmatched () in regexp |
3325 | ||
3326 | (F) Unbackslashed parentheses must always be balanced in regular | |
be771a83 GS |
3327 | expressions. If you're a vi user, the % key is valuable for finding the |
3328 | matching parenthesis. See L<perlre>. | |
a0d0e21e | 3329 | |
d98d5fff | 3330 | =item Unmatched right %s bracket |
a0d0e21e | 3331 | |
be771a83 GS |
3332 | (F) The lexer counted more closing curly or square brackets than opening |
3333 | ones, so you're probably missing a matching opening bracket. As a | |
3334 | general rule, you'll find the missing one (so to speak) near the place | |
3335 | you were last editing. | |
a0d0e21e | 3336 | |
a0d0e21e LW |
3337 | =item Unquoted string "%s" may clash with future reserved word |
3338 | ||
be771a83 GS |
3339 | (W reserved) You used a bareword that might someday be claimed as a |
3340 | reserved word. It's best to put such a word in quotes, or capitalize it | |
3341 | somehow, or insert an underbar into it. You might also declare it as a | |
3342 | subroutine. | |
a0d0e21e | 3343 | |
54310121 | 3344 | =item Unrecognized character %s |
a0d0e21e | 3345 | |
54310121 | 3346 | (F) The Perl parser has no idea what to do with the specified character |
3347 | in your Perl script (or eval). Perhaps you tried to run a compressed | |
3348 | script, a binary program, or a directory as a Perl program. | |
a0d0e21e | 3349 | |
6df41af2 GS |
3350 | =item /%s/: Unrecognized escape \\%c in character class passed through |
3351 | ||
be771a83 GS |
3352 | (W regexp) You used a backslash-character combination which is not |
3353 | recognized by Perl inside character classes. The character was | |
3354 | understood literally. | |
6df41af2 GS |
3355 | |
3356 | =item /%s/: Unrecognized escape \\%c passed through | |
3357 | ||
be771a83 GS |
3358 | (W regexp) You used a backslash-character combination which is not |
3359 | recognized by Perl. This combination appears in an interpolated | |
3360 | variable or a C<'>-delimited regular expression. The character was | |
3361 | understood literally. | |
6df41af2 | 3362 | |
c9f97d15 IZ |
3363 | =item Unrecognized escape \\%c passed through |
3364 | ||
be771a83 GS |
3365 | (W misc) You used a backslash-character combination which is not |
3366 | recognized by Perl. | |
c9f97d15 | 3367 | |
a0d0e21e LW |
3368 | =item Unrecognized signal name "%s" |
3369 | ||
be771a83 GS |
3370 | (F) You specified a signal name to the kill() function that was not |
3371 | recognized. Say C<kill -l> in your shell to see the valid signal names | |
3372 | on your system. | |
a0d0e21e | 3373 | |
90248788 | 3374 | =item Unrecognized switch: -%s (-h will show valid options) |
a0d0e21e | 3375 | |
be771a83 GS |
3376 | (F) You specified an illegal option to Perl. Don't do that. (If you |
3377 | think you didn't do that, check the #! line to see if it's supplying the | |
3378 | bad switch on your behalf.) | |
a0d0e21e LW |
3379 | |
3380 | =item Unsuccessful %s on filename containing newline | |
3381 | ||
be771a83 GS |
3382 | (W newline) A file operation was attempted on a filename, and that |
3383 | operation failed, PROBABLY because the filename contained a newline, | |
3384 | PROBABLY because you forgot to chop() or chomp() it off. See | |
3385 | L<perlfunc/chomp>. | |
a0d0e21e LW |
3386 | |
3387 | =item Unsupported directory function "%s" called | |
3388 | ||
3389 | (F) Your machine doesn't support opendir() and readdir(). | |
3390 | ||
6df41af2 GS |
3391 | =item Unsupported function %s |
3392 | ||
3393 | (F) This machine doesn't implement the indicated function, apparently. | |
3394 | At least, Configure doesn't think so. | |
3395 | ||
54310121 | 3396 | =item Unsupported function fork |
3397 | ||
3398 | (F) Your version of executable does not support forking. | |
3399 | ||
be771a83 GS |
3400 | Note that under some systems, like OS/2, there may be different flavors |
3401 | of Perl executables, some of which may support fork, some not. Try | |
3402 | changing the name you call Perl by to C<perl_>, C<perl__>, and so on. | |
54310121 | 3403 | |
a0d0e21e LW |
3404 | =item Unsupported socket function "%s" called |
3405 | ||
3406 | (F) Your machine doesn't support the Berkeley socket mechanism, or at | |
3407 | least that's what Configure thought. | |
3408 | ||
6df41af2 | 3409 | =item Unterminated attribute list |
a0d0e21e | 3410 | |
be771a83 GS |
3411 | (F) The lexer found something other than a simple identifier at the |
3412 | start of an attribute, and it wasn't a semicolon or the start of a | |
3413 | block. Perhaps you terminated the parameter list of the previous | |
3414 | attribute too soon. See L<attributes>. | |
a0d0e21e | 3415 | |
09bef843 SB |
3416 | =item Unterminated attribute parameter in attribute list |
3417 | ||
be771a83 GS |
3418 | (F) The lexer saw an opening (left) parenthesis character while parsing |
3419 | an attribute list, but the matching closing (right) parenthesis | |
09bef843 SB |
3420 | character was not found. You may need to add (or remove) a backslash |
3421 | character to get your parentheses to balance. See L<attributes>. | |
3422 | ||
6df41af2 | 3423 | =item Unterminated <> operator |
09bef843 | 3424 | |
6df41af2 | 3425 | (F) The lexer saw a left angle bracket in a place where it was expecting |
be771a83 GS |
3426 | a term, so it's looking for the corresponding right angle bracket, and |
3427 | not finding it. Chances are you left some needed parentheses out | |
3428 | earlier in the line, and you really meant a "less than". | |
09bef843 | 3429 | |
6df41af2 | 3430 | =item untie attempted while %d inner references still exist |
a0d0e21e | 3431 | |
be771a83 GS |
3432 | (W untie) A copy of the object returned from C<tie> (or C<tied>) was |
3433 | still valid when C<untie> was called. | |
a0d0e21e | 3434 | |
6df41af2 | 3435 | =item Useless use of %s in void context |
a0d0e21e | 3436 | |
75b44862 | 3437 | (W void) You did something without a side effect in a context that does |
be771a83 GS |
3438 | nothing with the return value, such as a statement that doesn't return a |
3439 | value from a block, or the left side of a scalar comma operator. Very | |
3440 | often this points not to stupidity on your part, but a failure of Perl | |
3441 | to parse your program the way you thought it would. For example, you'd | |
3442 | get this if you mixed up your C precedence with Python precedence and | |
3443 | said | |
a0d0e21e | 3444 | |
6df41af2 | 3445 | $one, $two = 1, 2; |
748a9306 | 3446 | |
6df41af2 GS |
3447 | when you meant to say |
3448 | ||
3449 | ($one, $two) = (1, 2); | |
3450 | ||
3451 | Another common error is to use ordinary parentheses to construct a list | |
3452 | reference when you should be using square or curly brackets, for | |
3453 | example, if you say | |
3454 | ||
3455 | $array = (1,2); | |
3456 | ||
3457 | when you should have said | |
3458 | ||
3459 | $array = [1,2]; | |
3460 | ||
3461 | The square brackets explicitly turn a list value into a scalar value, | |
3462 | while parentheses do not. So when a parenthesized list is evaluated in | |
3463 | a scalar context, the comma is treated like C's comma operator, which | |
3464 | throws away the left argument, which is not what you want. See | |
3465 | L<perlref> for more on this. | |
3466 | ||
3467 | =item Useless use of "re" pragma | |
3468 | ||
3469 | (W) You did C<use re;> without any arguments. That isn't very useful. | |
3470 | ||
3471 | =item "use" not allowed in expression | |
3472 | ||
be771a83 GS |
3473 | (F) The "use" keyword is recognized and executed at compile time, and |
3474 | returns no useful value. See L<perlmod>. | |
748a9306 | 3475 | |
c47ff5f1 | 3476 | =item Use of bare << to mean <<"" is deprecated |
4633a7c4 | 3477 | |
be771a83 GS |
3478 | (D deprecated) You are now encouraged to use the explicitly quoted form |
3479 | if you wish to use an empty line as the terminator of the here-document. | |
4633a7c4 | 3480 | |
a0d0e21e LW |
3481 | =item Use of implicit split to @_ is deprecated |
3482 | ||
be771a83 GS |
3483 | (D deprecated) It makes a lot of work for the compiler when you clobber |
3484 | a subroutine's argument list, so it's better if you assign the results | |
3485 | of a split() explicitly to an array (or list). | |
a0d0e21e | 3486 | |
dc848c6f | 3487 | =item Use of inherited AUTOLOAD for non-method %s() is deprecated |
3488 | ||
be771a83 GS |
3489 | (D deprecated) As an (ahem) accidental feature, C<AUTOLOAD> subroutines |
3490 | are looked up as methods (using the C<@ISA> hierarchy) even when the | |
3491 | subroutines to be autoloaded were called as plain functions (e.g. | |
3492 | C<Foo::bar()>), not as methods (e.g. C<< Foo->bar() >> or C<< | |
3493 | $obj->bar() >>). | |
dc848c6f | 3494 | |
be771a83 GS |
3495 | This bug will be rectified in future by using method lookup only for |
3496 | methods' C<AUTOLOAD>s. However, there is a significant base of existing | |
3497 | code that may be using the old behavior. So, as an interim step, Perl | |
3498 | currently issues an optional warning when non-methods use inherited | |
3499 | C<AUTOLOAD>s. | |
dc848c6f | 3500 | |
3501 | The simple rule is: Inheritance will not work when autoloading | |
be771a83 GS |
3502 | non-methods. The simple fix for old code is: In any module that used |
3503 | to depend on inheriting C<AUTOLOAD> for non-methods from a base class | |
3504 | named C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during | |
3505 | startup. | |
dc848c6f | 3506 | |
be771a83 GS |
3507 | In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> |
3508 | you should remove AutoLoader from @ISA and change C<use AutoLoader;> to | |
7b8d334a | 3509 | C<use AutoLoader 'AUTOLOAD';>. |
fb73857a | 3510 | |
6df41af2 GS |
3511 | =item Use of %s in printf format not supported |
3512 | ||
3513 | (F) You attempted to use a feature of printf that is accessible from | |
3514 | only C. This usually means there's a better way to do it in Perl. | |
3515 | ||
3516 | =item Use of $* is deprecated | |
3517 | ||
be771a83 GS |
3518 | (D deprecated) This variable magically turned on multi-line pattern |
3519 | matching, both for you and for any luckless subroutine that you happen | |
3520 | to call. You should use the new C<//m> and C<//s> modifiers now to do | |
3521 | that without the dangerous action-at-a-distance effects of C<$*>. | |
6df41af2 GS |
3522 | |
3523 | =item Use of %s is deprecated | |
3524 | ||
75b44862 | 3525 | (D deprecated) The construct indicated is no longer recommended for use, |
be771a83 GS |
3526 | generally because there's a better way to do it, and also because the |
3527 | old way has bad side effects. | |
6df41af2 GS |
3528 | |
3529 | =item Use of $# is deprecated | |
3530 | ||
be771a83 GS |
3531 | (D deprecated) This was an ill-advised attempt to emulate a poorly |
3532 | defined B<awk> feature. Use an explicit printf() or sprintf() instead. | |
6df41af2 | 3533 | |
85b81015 LW |
3534 | =item Use of reserved word "%s" is deprecated |
3535 | ||
be771a83 GS |
3536 | (D deprecated) The indicated bareword is a reserved word. Future |
3537 | versions of perl may use it as a keyword, so you're better off either | |
3538 | explicitly quoting the word in a manner appropriate for its context of | |
3539 | use, or using a different name altogether. The warning can be | |
3540 | suppressed for subroutine names by either adding a C<&> prefix, or using | |
3541 | a package qualifier, e.g. C<&our()>, or C<Foo::our()>. | |
85b81015 | 3542 | |
cc95b072 | 3543 | =item Use of uninitialized value%s |
a0d0e21e | 3544 | |
be771a83 GS |
3545 | (W uninitialized) An undefined value was used as if it were already |
3546 | defined. It was interpreted as a "" or a 0, but maybe it was a mistake. | |
3547 | To suppress this warning assign a defined value to your variables. | |
a0d0e21e | 3548 | |
68dc0745 | 3549 | =item Value of %s can be "0"; test with defined() |
a6006777 | 3550 | |
75b44862 | 3551 | (W misc) In a conditional expression, you used <HANDLE>, <*> (glob), |
be771a83 GS |
3552 | C<each()>, or C<readdir()> as a boolean value. Each of these constructs |
3553 | can return a value of "0"; that would make the conditional expression | |
3554 | false, which is probably not what you intended. When using these | |
3555 | constructs in conditional expressions, test their values with the | |
3556 | C<defined> operator. | |
a6006777 | 3557 | |
f675dbe5 CB |
3558 | =item Value of CLI symbol "%s" too long |
3559 | ||
be771a83 GS |
3560 | (W misc) A warning peculiar to VMS. Perl tried to read the value of an |
3561 | %ENV element from a CLI symbol table, and found a resultant string | |
3562 | longer than 1024 characters. The return value has been truncated to | |
3563 | 1024 characters. | |
f675dbe5 | 3564 | |
9607fc9c | 3565 | =item Variable "%s" is not imported%s |
4633a7c4 | 3566 | |
be771a83 GS |
3567 | (F) While "use strict" in effect, you referred to a global variable that |
3568 | you apparently thought was imported from another module, because | |
3569 | something else of the same name (usually a subroutine) is exported by | |
3570 | that module. It usually means you put the wrong funny character on the | |
3571 | front of your variable. | |
4633a7c4 | 3572 | |
6df41af2 GS |
3573 | =item "%s" variable %s masks earlier declaration in same %s |
3574 | ||
be771a83 GS |
3575 | (W misc) A "my" or "our" variable has been redeclared in the current |
3576 | scope or statement, effectively eliminating all access to the previous | |
3577 | instance. This is almost always a typographical error. Note that the | |
3578 | earlier variable will still exist until the end of the scope or until | |
3579 | all closure referents to it are destroyed. | |
6df41af2 | 3580 | |
44a8e56a | 3581 | =item Variable "%s" may be unavailable |
3582 | ||
be771a83 GS |
3583 | (W closure) An inner (nested) I<anonymous> subroutine is inside a |
3584 | I<named> subroutine, and outside that is another subroutine; and the | |
3585 | anonymous (innermost) subroutine is referencing a lexical variable | |
3586 | defined in the outermost subroutine. For example: | |
44a8e56a | 3587 | |
3588 | sub outermost { my $a; sub middle { sub { $a } } } | |
3589 | ||
3590 | If the anonymous subroutine is called or referenced (directly or | |
be771a83 GS |
3591 | indirectly) from the outermost subroutine, it will share the variable as |
3592 | you would expect. But if the anonymous subroutine is called or | |
3593 | referenced when the outermost subroutine is not active, it will see the | |
3594 | value of the shared variable as it was before and during the *first* | |
3595 | call to the outermost subroutine, which is probably not what you want. | |
3596 | ||
3597 | In these circumstances, it is usually best to make the middle subroutine | |
3598 | anonymous, using the C<sub {}> syntax. Perl has specific support for | |
3599 | shared variables in nested anonymous subroutines; a named subroutine in | |
3600 | between interferes with this feature. | |
44a8e56a | 3601 | |
6df41af2 GS |
3602 | =item Variable syntax |
3603 | ||
3604 | (A) You've accidentally run your script through B<csh> instead | |
3605 | of Perl. Check the #! line, or manually feed your script into | |
3606 | Perl yourself. | |
3607 | ||
44a8e56a | 3608 | =item Variable "%s" will not stay shared |
3609 | ||
be771a83 GS |
3610 | (W closure) An inner (nested) I<named> subroutine is referencing a |
3611 | lexical variable defined in an outer subroutine. | |
44a8e56a | 3612 | |
3613 | When the inner subroutine is called, it will probably see the value of | |
be771a83 GS |
3614 | the outer subroutine's variable as it was before and during the *first* |
3615 | call to the outer subroutine; in this case, after the first call to the | |
3616 | outer subroutine is complete, the inner and outer subroutines will no | |
3617 | longer share a common value for the variable. In other words, the | |
3618 | variable will no longer be shared. | |
44a8e56a | 3619 | |
3620 | Furthermore, if the outer subroutine is anonymous and references a | |
3621 | lexical variable outside itself, then the outer and inner subroutines | |
3622 | will I<never> share the given variable. | |
3623 | ||
3624 | This problem can usually be solved by making the inner subroutine | |
3625 | anonymous, using the C<sub {}> syntax. When inner anonymous subs that | |
be771a83 GS |
3626 | reference variables in outer subroutines are called or referenced, they |
3627 | are automatically rebound to the current values of such variables. | |
44a8e56a | 3628 | |
084610c0 GS |
3629 | =item Version number must be a constant number |
3630 | ||
3631 | (P) The attempt to translate a C<use Module n.n LIST> statement into | |
3632 | its equivalent C<BEGIN> block found an internal inconsistency with | |
3633 | the version number. | |
3634 | ||
7e1af8bc | 3635 | =item Warning: something's wrong |
5f05dabc | 3636 | |
3637 | (W) You passed warn() an empty string (the equivalent of C<warn "">) or | |
3638 | you called it with no args and C<$_> was empty. | |
3639 | ||
f86702cc | 3640 | =item Warning: unable to close filehandle %s properly |
a0d0e21e | 3641 | |
be771a83 GS |
3642 | (S) The implicit close() done by an open() got an error indication on |
3643 | the close(). This usually indicates your file system ran out of disk | |
3644 | space. | |
a0d0e21e | 3645 | |
5f05dabc | 3646 | =item Warning: Use of "%s" without parentheses is ambiguous |
a0d0e21e | 3647 | |
be771a83 GS |
3648 | (S ambiguous) You wrote a unary operator followed by something that |
3649 | looks like a binary operator that could also have been interpreted as a | |
3650 | term or unary operator. For instance, if you know that the rand | |
3651 | function has a default argument of 1.0, and you write | |
a0d0e21e LW |
3652 | |
3653 | rand + 5; | |
3654 | ||
3655 | you may THINK you wrote the same thing as | |
3656 | ||
3657 | rand() + 5; | |
3658 | ||
3659 | but in actual fact, you got | |
3660 | ||
3661 | rand(+5); | |
3662 | ||
5f05dabc | 3663 | So put in parentheses to say what you really mean. |
a0d0e21e | 3664 | |
9a7dcd9c | 3665 | =item write() on closed filehandle %s |
a0d0e21e | 3666 | |
be771a83 GS |
3667 | (W closed) The filehandle you're writing to got itself closed sometime |
3668 | before now. Check your logic flow. | |
a0d0e21e LW |
3669 | |
3670 | =item X outside of string | |
3671 | ||
3672 | (F) You had a pack template that specified a relative position before | |
3673 | the beginning of the string being unpacked. See L<perlfunc/pack>. | |
3674 | ||
3675 | =item x outside of string | |
3676 | ||
3677 | (F) You had a pack template that specified a relative position after | |
3678 | the end of the string being unpacked. See L<perlfunc/pack>. | |
3679 | ||
3680 | =item Xsub "%s" called in sort | |
3681 | ||
be771a83 GS |
3682 | (F) The use of an external subroutine as a sort comparison is not yet |
3683 | supported. | |
a0d0e21e LW |
3684 | |
3685 | =item Xsub called in sort | |
3686 | ||
be771a83 GS |
3687 | (F) The use of an external subroutine as a sort comparison is not yet |
3688 | supported. | |
a0d0e21e LW |
3689 | |
3690 | =item You can't use C<-l> on a filehandle | |
3691 | ||
be771a83 GS |
3692 | (F) A filehandle represents an opened file, and when you opened the file |
3693 | it already went past any symlink you are presumably trying to look for. | |
a0d0e21e LW |
3694 | Use a filename instead. |
3695 | ||
3696 | =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! | |
3697 | ||
5f05dabc | 3698 | (F) And you probably never will, because you probably don't have the |
a0d0e21e | 3699 | sources to your kernel, and your vendor probably doesn't give a rip |
be771a83 GS |
3700 | about what you want. Your best bet is to use the wrapsuid script in the |
3701 | eg directory to put a setuid C wrapper around your script. | |
a0d0e21e LW |
3702 | |
3703 | =item You need to quote "%s" | |
3704 | ||
be771a83 GS |
3705 | (W syntax) You assigned a bareword as a signal handler name. |
3706 | Unfortunately, you already have a subroutine of that name declared, | |
3707 | which means that Perl 5 will try to call the subroutine when the | |
3708 | assignment is executed, which is probably not what you want. (If it IS | |
3709 | what you want, put an & in front.) | |
a0d0e21e | 3710 | |
a0d0e21e LW |
3711 | =back |
3712 | ||
56e90b21 | 3713 | =cut |