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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). |
12 | (S) A severe warning (mandatory). |
13 | (F) A fatal error (trappable). |
14 | (P) An internal error you should never see (trappable). |
15 | (X) A very fatal error (non-trappable). |
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16 | (A) An alien error message (not generated by Perl). |
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17 | |
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18 | Optional warnings are enabled by using the B<-w> switch. Warnings may |
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19 | be captured by setting C<$SIG{__WARN__}> to a reference to a routine that will be |
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20 | called on each warning instead of printing it. See L<perlvar>. |
21 | Trappable errors may be trapped using the eval operator. See |
22 | L<perlfunc/eval>. |
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23 | |
24 | Some of these messages are generic. Spots that vary are denoted with a %s, |
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25 | just as in a printf format. Note that some messages start with a %s! |
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26 | The symbols C<"%-?@> sort before the letters, while C<[> and C<\> sort after. |
27 | |
28 | =over 4 |
29 | |
30 | =item "my" variable %s can't be in a package |
31 | |
32 | (F) Lexically scoped variables aren't in a package, so it doesn't make sense |
33 | to try to declare one with a package qualifier on the front. Use local() |
34 | if you want to localize a package variable. |
35 | |
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36 | =item "my" variable %s masks earlier declaration in same scope |
37 | |
38 | (S) A lexical variable has been redeclared in the same scope, effectively |
39 | eliminating all access to the previous instance. This is almost always |
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40 | a typographical error. Note that the earlier variable will still exist |
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41 | until the end of the scope or until all closure referents to it are |
42 | destroyed. |
43 | |
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44 | =item "no" not allowed in expression |
45 | |
46 | (F) The "no" keyword is recognized and executed at compile time, and returns |
47 | no useful value. See L<perlmod>. |
48 | |
49 | =item "use" not allowed in expression |
50 | |
51 | (F) The "use" keyword is recognized and executed at compile time, and returns |
52 | no useful value. See L<perlmod>. |
53 | |
54 | =item % may only be used in unpack |
55 | |
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56 | (F) You can't pack a string by supplying a checksum, because the |
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57 | checksumming process loses information, and you can't go the other |
58 | way. See L<perlfunc/unpack>. |
59 | |
60 | =item %s (...) interpreted as function |
61 | |
62 | (W) You've run afoul of the rule that says that any list operator followed |
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63 | by parentheses turns into a function, with all the list operators arguments |
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64 | found inside the parentheses. See L<perlop/Terms and List Operators (Leftward)>. |
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65 | |
66 | =item %s argument is not a HASH element |
67 | |
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68 | (F) The argument to exists() must be a hash element, such as |
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69 | |
70 | $foo{$bar} |
71 | $ref->[12]->{"susie"} |
72 | |
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73 | =item %s argument is not a HASH element or slice |
74 | |
75 | (F) The argument to delete() must be either a hash element, such as |
76 | |
77 | $foo{$bar} |
78 | $ref->[12]->{"susie"} |
79 | |
80 | or a hash slice, such as |
81 | |
82 | @foo{$bar, $baz, $xyzzy} |
83 | @{$ref->[12]}{"susie", "queue"} |
84 | |
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85 | =item %s did not return a true value |
86 | |
87 | (F) A required (or used) file must return a true value to indicate that |
88 | it compiled correctly and ran its initialization code correctly. It's |
89 | traditional to end such a file with a "1;", though any true value would |
90 | do. See L<perlfunc/require>. |
91 | |
92 | =item %s found where operator expected |
93 | |
94 | (S) The Perl lexer knows whether to expect a term or an operator. If it |
95 | sees what it knows to be a term when it was expecting to see an operator, |
96 | it gives you this warning. Usually it indicates that an operator or |
97 | delimiter was omitted, such as a semicolon. |
98 | |
99 | =item %s had compilation errors. |
100 | |
101 | (F) The final summary message when a C<perl -c> fails. |
102 | |
103 | =item %s has too many errors. |
104 | |
105 | (F) The parser has given up trying to parse the program after 10 errors. |
106 | Further error messages would likely be uninformative. |
107 | |
108 | =item %s matches null string many times |
109 | |
110 | (W) The pattern you've specified would be an infinite loop if the |
111 | regular expression engine didn't specifically check for that. See L<perlre>. |
112 | |
113 | =item %s never introduced |
114 | |
115 | (S) The symbol in question was declared but somehow went out of scope |
116 | before it could possibly have been used. |
117 | |
118 | =item %s syntax OK |
119 | |
120 | (F) The final summary message when a C<perl -c> succeeds. |
121 | |
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122 | =item %s: Command not found. |
123 | |
124 | (A) You've accidentally run your script through B<csh> instead |
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125 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
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126 | into Perl yourself. |
127 | |
128 | =item %s: Expression syntax. |
129 | |
130 | (A) You've accidentally run your script through B<csh> instead |
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131 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
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132 | into Perl yourself. |
133 | |
134 | =item %s: Undefined variable. |
135 | |
136 | (A) You've accidentally run your script through B<csh> instead |
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137 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
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138 | into Perl yourself. |
139 | |
140 | =item %s: not found |
141 | |
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142 | (A) You've accidentally run your script through the Bourne shell |
143 | instead of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
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144 | into Perl yourself. |
145 | |
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146 | =item B<-P> not allowed for setuid/setgid script |
147 | |
148 | (F) The script would have to be opened by the C preprocessor by name, |
149 | which provides a race condition that breaks security. |
150 | |
151 | =item C<-T> and C<-B> not implemented on filehandles |
152 | |
153 | (F) Perl can't peek at the stdio buffer of filehandles when it doesn't |
154 | know about your kind of stdio. You'll have to use a filename instead. |
155 | |
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156 | =item 500 Server error |
157 | |
158 | See Server error. |
159 | |
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160 | =item ?+* follows nothing in regexp |
161 | |
162 | (F) You started a regular expression with a quantifier. Backslash it |
163 | if you meant it literally. See L<perlre>. |
164 | |
165 | =item @ outside of string |
166 | |
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167 | (F) You had a pack template that specified an absolute position outside |
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168 | the string being unpacked. See L<perlfunc/pack>. |
169 | |
170 | =item accept() on closed fd |
171 | |
172 | (W) You tried to do an accept on a closed socket. Did you forget to check |
173 | the return value of your socket() call? See L<perlfunc/accept>. |
174 | |
175 | =item Allocation too large: %lx |
176 | |
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177 | (X) You can't allocate more than 64K on an MSDOS machine. |
178 | |
179 | =item Allocation too large |
180 | |
181 | (F) You can't allocate more than 2^31+"small amount" bytes. |
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182 | |
183 | =item Arg too short for msgsnd |
184 | |
185 | (F) msgsnd() requires a string at least as long as sizeof(long). |
186 | |
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187 | =item Ambiguous use of %s resolved as %s |
188 | |
189 | (W)(S) You said something that may not be interpreted the way |
190 | you thought. Normally it's pretty easy to disambiguate it by supplying |
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191 | a missing quote, operator, parenthesis pair or declaration. |
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192 | |
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193 | =item Args must match #! line |
194 | |
195 | (F) The setuid emulator requires that the arguments Perl was invoked |
196 | with match the arguments specified on the #! line. |
197 | |
198 | =item Argument "%s" isn't numeric |
199 | |
200 | (W) The indicated string was fed as an argument to an operator that |
201 | expected a numeric value instead. If you're fortunate the message |
202 | will identify which operator was so unfortunate. |
203 | |
204 | =item Array @%s missing the @ in argument %d of %s() |
205 | |
206 | (D) Really old Perl let you omit the @ on array names in some spots. This |
207 | is now heavily deprecated. |
208 | |
209 | =item assertion botched: %s |
210 | |
211 | (P) The malloc package that comes with Perl had an internal failure. |
212 | |
213 | =item Assertion failed: file "%s" |
214 | |
215 | (P) A general assertion failed. The file in question must be examined. |
216 | |
217 | =item Assignment to both a list and a scalar |
218 | |
219 | (F) If you assign to a conditional operator, the 2nd and 3rd arguments |
220 | must either both be scalars or both be lists. Otherwise Perl won't |
221 | know which context to supply to the right side. |
222 | |
223 | =item Attempt to free non-arena SV: 0x%lx |
224 | |
225 | (P) All SV objects are supposed to be allocated from arenas that will |
226 | be garbage collected on exit. An SV was discovered to be outside any |
227 | of those arenas. |
228 | |
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229 | =item Attempt to free non-existent shared string |
230 | |
231 | (P) Perl maintains a reference counted internal table of strings to |
232 | optimize the storage and access of hash keys and other strings. This |
233 | indicates someone tried to decrement the reference count of a string |
234 | that can no longer be found in the table. |
235 | |
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236 | =item Attempt to free temp prematurely |
237 | |
238 | (W) Mortalized values are supposed to be freed by the free_tmps() |
239 | routine. This indicates that something else is freeing the SV before |
240 | the free_tmps() routine gets a chance, which means that the free_tmps() |
241 | routine will be freeing an unreferenced scalar when it does try to free |
242 | it. |
243 | |
244 | =item Attempt to free unreferenced glob pointers |
245 | |
246 | (P) The reference counts got screwed up on symbol aliases. |
247 | |
248 | =item Attempt to free unreferenced scalar |
249 | |
250 | (W) Perl went to decrement the reference count of a scalar to see if it |
251 | would go to 0, and discovered that it had already gone to 0 earlier, |
252 | and should have been freed, and in fact, probably was freed. This |
253 | could indicate that SvREFCNT_dec() was called too many times, or that |
254 | SvREFCNT_inc() was called too few times, or that the SV was mortalized |
255 | when it shouldn't have been, or that memory has been corrupted. |
256 | |
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257 | =item Attempt to use reference as lvalue in substr |
258 | |
259 | (W) You supplied a reference as the first argument to substr() used |
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260 | as an lvalue, which is pretty strange. Perhaps you forgot to |
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261 | dereference it first. See L<perlfunc/substr>. |
262 | |
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263 | =item Bad arg length for %s, is %d, should be %d |
264 | |
265 | (F) You passed a buffer of the wrong size to one of msgctl(), semctl() or |
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266 | shmctl(). In C parlance, the correct sizes are, respectively, |
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267 | S<sizeof(struct msqid_ds *)>, S<sizeof(struct semid_ds *)>, and |
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268 | S<sizeof(struct shmid_ds *)>. |
269 | |
270 | =item Bad associative array |
271 | |
272 | (P) One of the internal hash routines was passed a null HV pointer. |
273 | |
274 | =item Bad filehandle: %s |
275 | |
276 | (F) A symbol was passed to something wanting a filehandle, but the symbol |
277 | has no filehandle associated with it. Perhaps you didn't do an open(), or |
278 | did it in another package. |
279 | |
280 | =item Bad free() ignored |
281 | |
282 | (S) An internal routine called free() on something that had never been |
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283 | malloc()ed in the first place. Mandatory, but can be disabled by |
284 | setting environment variable C<PERL_BADFREE> to 1. |
285 | |
286 | This message can be quite often seen with DB_File on systems with |
287 | "hard" dynamic linking, like C<AIX> and C<OS/2>. It is a bug of |
288 | C<Berkeley DB> which is left unnoticed if C<DB> uses I<forgiving> |
289 | system malloc(). |
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290 | |
291 | =item Bad name after %s:: |
292 | |
293 | (F) You started to name a symbol by using a package prefix, and then didn't |
294 | finish the symbol. In particular, you can't interpolate outside of quotes, |
295 | so |
296 | |
297 | $var = 'myvar'; |
298 | $sym = mypack::$var; |
299 | |
300 | is not the same as |
301 | |
302 | $var = 'myvar'; |
303 | $sym = "mypack::$var"; |
304 | |
305 | =item Bad symbol for array |
306 | |
307 | (P) An internal request asked to add an array entry to something that |
308 | wasn't a symbol table entry. |
309 | |
310 | =item Bad symbol for filehandle |
311 | |
312 | (P) An internal request asked to add a filehandle entry to something that |
313 | wasn't a symbol table entry. |
314 | |
315 | =item Bad symbol for hash |
316 | |
317 | (P) An internal request asked to add a hash entry to something that |
318 | wasn't a symbol table entry. |
319 | |
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320 | =item Badly placed ()'s |
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321 | |
322 | (A) You've accidentally run your script through B<csh> instead |
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323 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
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324 | into Perl yourself. |
325 | |
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326 | =item BEGIN failed--compilation aborted |
327 | |
328 | (F) An untrapped exception was raised while executing a BEGIN subroutine. |
329 | Compilation stops immediately and the interpreter is exited. |
330 | |
331 | =item bind() on closed fd |
332 | |
333 | (W) You tried to do a bind on a closed socket. Did you forget to check |
334 | the return value of your socket() call? See L<perlfunc/bind>. |
335 | |
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336 | =item Bizarre copy of %s in %s |
337 | |
338 | (P) Perl detected an attempt to copy an internal value that is not copiable. |
339 | |
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340 | =item Callback called exit |
341 | |
342 | (F) A subroutine invoked from an external package via perl_call_sv() |
343 | exited by calling exit. |
344 | |
345 | =item Can't "last" outside a block |
346 | |
347 | (F) A "last" statement was executed to break out of the current block, |
348 | except that there's this itty bitty problem called there isn't a |
349 | current block. Note that an "if" or "else" block doesn't count as a |
350 | "loopish" block. You can usually double the curlies to get the same |
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351 | effect though, because the inner curlies will be considered a block |
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352 | that loops once. See L<perlfunc/last>. |
353 | |
354 | =item Can't "next" outside a block |
355 | |
356 | (F) A "next" statement was executed to reiterate the current block, but |
357 | there isn't a current block. Note that an "if" or "else" block doesn't |
358 | count as a "loopish" block. You can usually double the curlies to get |
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359 | the same effect though, because the inner curlies will be considered a block |
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360 | that loops once. See L<perlfunc/last>. |
361 | |
362 | =item Can't "redo" outside a block |
363 | |
364 | (F) A "redo" statement was executed to restart the current block, but |
365 | there isn't a current block. Note that an "if" or "else" block doesn't |
366 | count as a "loopish" block. You can usually double the curlies to get |
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367 | the same effect though, because the inner curlies will be considered a block |
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368 | that loops once. See L<perlfunc/last>. |
369 | |
370 | =item Can't bless non-reference value |
371 | |
372 | (F) Only hard references may be blessed. This is how Perl "enforces" |
373 | encapsulation of objects. See L<perlobj>. |
374 | |
375 | =item Can't break at that line |
376 | |
377 | (S) A warning intended for while running within the debugger, indicating |
378 | the line number specified wasn't the location of a statement that could |
379 | be stopped at. |
380 | |
381 | =item Can't call method "%s" in empty package "%s" |
382 | |
383 | (F) You called a method correctly, and it correctly indicated a package |
384 | functioning as a class, but that package doesn't have ANYTHING defined |
385 | in it, let alone methods. See L<perlobj>. |
386 | |
387 | =item Can't call method "%s" on unblessed reference |
388 | |
389 | (F) A method call must know what package it's supposed to run in. It |
390 | ordinarily finds this out from the object reference you supply, but |
391 | you didn't supply an object reference in this case. A reference isn't |
392 | an object reference until it has been blessed. See L<perlobj>. |
393 | |
394 | =item Can't call method "%s" without a package or object reference |
395 | |
396 | (F) You used the syntax of a method call, but the slot filled by the |
397 | object reference or package name contains an expression that returns |
398 | neither an object reference nor a package name. (Perhaps it's null?) |
399 | Something like this will reproduce the error: |
400 | |
401 | $BADREF = undef; |
402 | process $BADREF 1,2,3; |
403 | $BADREF->process(1,2,3); |
404 | |
405 | =item Can't chdir to %s |
406 | |
407 | (F) You called C<perl -x/foo/bar>, but C</foo/bar> is not a directory |
408 | that you can chdir to, possibly because it doesn't exist. |
409 | |
410 | =item Can't coerce %s to integer in %s |
411 | |
412 | (F) Certain types of SVs, in particular real symbol table entries |
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413 | (typeglobs), can't be forced to stop being what they are. So you can't |
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414 | say things like: |
415 | |
416 | *foo += 1; |
417 | |
418 | You CAN say |
419 | |
420 | $foo = *foo; |
421 | $foo += 1; |
422 | |
423 | but then $foo no longer contains a glob. |
424 | |
425 | =item Can't coerce %s to number in %s |
426 | |
427 | (F) Certain types of SVs, in particular real symbol table entries |
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428 | (typeglobs), can't be forced to stop being what they are. |
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429 | |
430 | =item Can't coerce %s to string in %s |
431 | |
432 | (F) Certain types of SVs, in particular real symbol table entries |
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433 | (typeglobs), can't be forced to stop being what they are. |
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434 | |
435 | =item Can't create pipe mailbox |
436 | |
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437 | (P) An error peculiar to VMS. The process is suffering from exhausted quotas |
438 | or other plumbing problems. |
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439 | |
440 | =item Can't declare %s in my |
441 | |
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442 | (F) Only scalar, array, and hash variables may be declared as lexical variables. |
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443 | They must have ordinary identifiers as names. |
444 | |
445 | =item Can't do inplace edit on %s: %s |
446 | |
447 | (S) The creation of the new file failed for the indicated reason. |
448 | |
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449 | =item Can't do in-place edit without backup |
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450 | |
451 | (F) You're on a system such as MSDOS that gets confused if you try reading |
452 | from a deleted (but still opened) file. You have to say B<-i>C<.bak>, or some |
453 | such. |
454 | |
8b1a09fc |
455 | =item Can't do inplace edit: %s E<gt> 14 characters |
a0d0e21e |
456 | |
457 | (S) There isn't enough room in the filename to make a backup name for the file. |
458 | |
459 | =item Can't do inplace edit: %s is not a regular file |
460 | |
461 | (S) You tried to use the B<-i> switch on a special file, such as a file in |
462 | /dev, or a FIFO. The file was ignored. |
463 | |
464 | =item Can't do setegid! |
465 | |
466 | (P) The setegid() call failed for some reason in the setuid emulator |
467 | of suidperl. |
468 | |
469 | =item Can't do seteuid! |
470 | |
471 | (P) The setuid emulator of suidperl failed for some reason. |
472 | |
473 | =item Can't do setuid |
474 | |
475 | (F) This typically means that ordinary perl tried to exec suidperl to |
476 | do setuid emulation, but couldn't exec it. It looks for a name of the |
477 | form sperl5.000 in the same directory that the perl executable resides |
478 | under the name perl5.000, typically /usr/local/bin on Unix machines. |
479 | If the file is there, check the execute permissions. If it isn't, ask |
480 | your sysadmin why he and/or she removed it. |
481 | |
482 | =item Can't do waitpid with flags |
483 | |
484 | (F) This machine doesn't have either waitpid() or wait4(), so only waitpid() |
485 | without flags is emulated. |
486 | |
8b1a09fc |
487 | =item Can't do {n,m} with n E<gt> m |
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488 | |
489 | (F) Minima must be less than or equal to maxima. If you really want |
490 | your regexp to match something 0 times, just put {0}. See L<perlre>. |
491 | |
492 | =item Can't emulate -%s on #! line |
493 | |
494 | (F) The #! line specifies a switch that doesn't make sense at this point. |
495 | For example, it'd be kind of silly to put a B<-x> on the #! line. |
496 | |
497 | =item Can't exec "%s": %s |
498 | |
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499 | (W) An system(), exec(), or piped open call could not execute the named |
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500 | program for the indicated reason. Typical reasons include: the permissions |
501 | were wrong on the file, the file wasn't found in C<$ENV{PATH}>, the |
502 | executable in question was compiled for another architecture, or the |
503 | #! line in a script points to an interpreter that can't be run for |
504 | similar reasons. (Or maybe your system doesn't support #! at all.) |
505 | |
506 | =item Can't exec %s |
507 | |
508 | (F) Perl was trying to execute the indicated program for you because that's |
509 | what the #! line said. If that's not what you wanted, you may need to |
510 | mention "perl" on the #! line somewhere. |
511 | |
512 | =item Can't execute %s |
513 | |
514 | (F) You used the B<-S> switch, but the script to execute could not be found |
515 | in the PATH, or at least not with the correct permissions. |
516 | |
517 | =item Can't find label %s |
518 | |
519 | (F) You said to goto a label that isn't mentioned anywhere that it's possible |
520 | for us to go to. See L<perlfunc/goto>. |
521 | |
522 | =item Can't find string terminator %s anywhere before EOF |
523 | |
524 | (F) Perl strings can stretch over multiple lines. This message means that |
5f05dabc |
525 | the closing delimiter was omitted. Because bracketed quotes count nesting |
a0d0e21e |
526 | levels, the following is missing its final parenthesis: |
527 | |
528 | print q(The character '(' starts a side comment.) |
529 | |
530 | =item Can't fork |
531 | |
532 | (F) A fatal error occurred while trying to fork while opening a pipeline. |
533 | |
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534 | =item Unsupported function fork |
535 | |
536 | (F) Your version of executable does not support forking. |
537 | |
538 | Note that under some systems, like OS/2, there may be different flavors of |
539 | Perl executables, some of which may support fork, some not. Try changing |
540 | the name you call Perl by to C<perl_>, C<perl__>, and so on. |
541 | |
748a9306 |
542 | =item Can't get filespec - stale stat buffer? |
543 | |
544 | (S) A warning peculiar to VMS. This arises because of the difference between |
545 | access checks under VMS and under the Unix model Perl assumes. Under VMS, |
546 | access checks are done by filename, rather than by bits in the stat buffer, so |
547 | that ACLs and other protections can be taken into account. Unfortunately, Perl |
548 | assumes that the stat buffer contains all the necessary information, and passes |
549 | it, instead of the filespec, to the access checking routine. It will try to |
550 | retrieve the filespec using the device name and FID present in the stat buffer, |
551 | but this works only if you haven't made a subsequent call to the CRTL stat() |
5f05dabc |
552 | routine, because the device name is overwritten with each call. If this warning |
748a9306 |
553 | appears, the name lookup failed, and the access checking routine gave up and |
554 | returned FALSE, just to be conservative. (Note: The access checking routine |
555 | knows about the Perl C<stat> operator and file tests, so you shouldn't ever |
556 | see this warning in response to a Perl command; it arises only if some internal |
557 | code takes stat buffers lightly.) |
558 | |
a0d0e21e |
559 | =item Can't get pipe mailbox device name |
560 | |
748a9306 |
561 | (P) An error peculiar to VMS. After creating a mailbox to act as a pipe, Perl |
562 | can't retrieve its name for later use. |
a0d0e21e |
563 | |
564 | =item Can't get SYSGEN parameter value for MAXBUF |
565 | |
748a9306 |
566 | (P) An error peculiar to VMS. Perl asked $GETSYI how big you want your |
567 | mailbox buffers to be, and didn't get an answer. |
a0d0e21e |
568 | |
569 | =item Can't goto subroutine outside a subroutine |
570 | |
571 | (F) The deeply magical "goto subroutine" call can only replace one subroutine |
572 | call for another. It can't manufacture one out of whole cloth. In general |
5f05dabc |
573 | you should be calling it out of only an AUTOLOAD routine anyway. See |
a0d0e21e |
574 | L<perlfunc/goto>. |
575 | |
4633a7c4 |
576 | =item Can't localize a reference |
577 | |
578 | (F) You said something like C<local $$ref>, which is not allowed because |
579 | the compiler can't determine whether $ref will end up pointing to anything |
580 | with a symbol table entry, and a symbol table entry is necessary to |
581 | do a local. |
582 | |
748a9306 |
583 | =item Can't localize lexical variable %s |
584 | |
2ba9eb46 |
585 | (F) You used local on a variable name that was previously declared as a |
748a9306 |
586 | lexical variable using "my". This is not allowed. If you want to |
587 | localize a package variable of the same name, qualify it with the |
588 | package name. |
589 | |
a0d0e21e |
590 | =item Can't locate %s in @INC |
591 | |
592 | (F) You said to do (or require, or use) a file that couldn't be found |
593 | in any of the libraries mentioned in @INC. Perhaps you need to set |
594 | the PERL5LIB environment variable to say where the extra library is, |
595 | or maybe the script needs to add the library name to @INC. Or maybe |
596 | you just misspelled the name of the file. See L<perlfunc/require>. |
597 | |
598 | =item Can't locate object method "%s" via package "%s" |
599 | |
600 | (F) You called a method correctly, and it correctly indicated a package |
601 | functioning as a class, but that package doesn't define that particular |
2ba9eb46 |
602 | method, nor does any of its base classes. See L<perlobj>. |
a0d0e21e |
603 | |
604 | =item Can't locate package %s for @%s::ISA |
605 | |
606 | (W) The @ISA array contained the name of another package that doesn't seem |
607 | to exist. |
608 | |
609 | =item Can't mktemp() |
610 | |
611 | (F) The mktemp() routine failed for some reason while trying to process |
612 | a B<-e> switch. Maybe your /tmp partition is full, or clobbered. |
613 | |
614 | =item Can't modify %s in %s |
615 | |
616 | (F) You aren't allowed to assign to the item indicated, or otherwise try to |
5f05dabc |
617 | change it, such as with an auto-increment. |
a0d0e21e |
618 | |
619 | =item Can't modify non-existent substring |
620 | |
621 | (P) The internal routine that does assignment to a substr() was handed |
622 | a NULL. |
623 | |
5f05dabc |
624 | =item Can't msgrcv to read-only var |
a0d0e21e |
625 | |
5f05dabc |
626 | (F) The target of a msgrcv must be modifiable to be used as a receive |
a0d0e21e |
627 | buffer. |
628 | |
629 | =item Can't open %s: %s |
630 | |
631 | (S) An inplace edit couldn't open the original file for the indicated reason. |
632 | Usually this is because you don't have read permission for the file. |
633 | |
634 | =item Can't open bidirectional pipe |
635 | |
636 | (W) You tried to say C<open(CMD, "|cmd|")>, which is not supported. You can |
637 | try any of several modules in the Perl library to do this, such as |
7e1af8bc |
638 | IPC::Open2. Alternately, direct the pipe's output to a file using "E<gt>", |
a0d0e21e |
639 | and then read it in under a different file handle. |
640 | |
748a9306 |
641 | =item Can't open error file %s as stderr |
642 | |
643 | (F) An error peculiar to VMS. Perl does its own command line redirection, and |
8b1a09fc |
644 | couldn't open the file specified after '2E<gt>' or '2E<gt>E<gt>' on the |
645 | command line for writing. |
748a9306 |
646 | |
647 | =item Can't open input file %s as stdin |
648 | |
649 | (F) An error peculiar to VMS. Perl does its own command line redirection, and |
8b1a09fc |
650 | couldn't open the file specified after 'E<lt>' on the command line for reading. |
748a9306 |
651 | |
652 | =item Can't open output file %s as stdout |
653 | |
654 | (F) An error peculiar to VMS. Perl does its own command line redirection, and |
8b1a09fc |
655 | couldn't open the file specified after 'E<gt>' or 'E<gt>E<gt>' on the command |
656 | line for writing. |
748a9306 |
657 | |
658 | =item Can't open output pipe (name: %s) |
659 | |
660 | (P) An error peculiar to VMS. Perl does its own command line redirection, and |
661 | couldn't open the pipe into which to send data destined for stdout. |
662 | |
a0d0e21e |
663 | =item Can't open perl script "%s": %s |
664 | |
665 | (F) The script you specified can't be opened for the indicated reason. |
666 | |
667 | =item Can't rename %s to %s: %s, skipping file |
668 | |
669 | (S) The rename done by the B<-i> switch failed for some reason, probably because |
670 | you don't have write permission to the directory. |
671 | |
748a9306 |
672 | =item Can't reopen input pipe (name: %s) in binary mode |
673 | |
674 | (P) An error peculiar to VMS. Perl thought stdin was a pipe, and tried to |
675 | reopen it to accept binary data. Alas, it failed. |
676 | |
a0d0e21e |
677 | =item Can't reswap uid and euid |
678 | |
679 | (P) The setreuid() call failed for some reason in the setuid emulator |
680 | of suidperl. |
681 | |
682 | =item Can't return outside a subroutine |
683 | |
684 | (F) The return statement was executed in mainline code, that is, where |
685 | there was no subroutine call to return out of. See L<perlsub>. |
686 | |
687 | =item Can't stat script "%s" |
688 | |
689 | (P) For some reason you can't fstat() the script even though you have |
690 | it open already. Bizarre. |
691 | |
692 | =item Can't swap uid and euid |
693 | |
694 | (P) The setreuid() call failed for some reason in the setuid emulator |
695 | of suidperl. |
696 | |
697 | =item Can't take log of %g |
698 | |
5f05dabc |
699 | (F) Logarithms are defined on only positive real numbers. |
a0d0e21e |
700 | |
701 | =item Can't take sqrt of %g |
702 | |
703 | (F) For ordinary real numbers, you can't take the square root of a |
704 | negative number. There's a Complex package available for Perl, though, |
705 | if you really want to do that. |
706 | |
707 | =item Can't undef active subroutine |
708 | |
709 | (F) You can't undefine a routine that's currently running. You can, |
710 | however, redefine it while it's running, and you can even undef the |
711 | redefined subroutine while the old routine is running. Go figure. |
712 | |
713 | =item Can't unshift |
714 | |
715 | (F) You tried to unshift an "unreal" array that can't be unshifted, such |
716 | as the main Perl stack. |
717 | |
718 | =item Can't upgrade that kind of scalar |
719 | |
720 | (P) The internal sv_upgrade routine adds "members" to an SV, making |
721 | it into a more specialized kind of SV. The top several SV types are |
722 | so specialized, however, that they cannot be interconverted. This |
723 | message indicates that such a conversion was attempted. |
724 | |
725 | =item Can't upgrade to undef |
726 | |
727 | (P) The undefined SV is the bottom of the totem pole, in the scheme |
728 | of upgradability. Upgrading to undef indicates an error in the |
729 | code calling sv_upgrade. |
730 | |
c07a80fd |
731 | =item Can't use "my %s" in sort comparison |
732 | |
733 | (F) The global variables $a and $b are reserved for sort comparisons. |
8b1a09fc |
734 | You mentioned $a or $b in the same line as the E<lt>=E<gt> or cmp operator, |
c07a80fd |
735 | and the variable had earlier been declared as a lexical variable. |
736 | Either qualify the sort variable with the package name, or rename the |
737 | lexical variable. |
738 | |
a0d0e21e |
739 | =item Can't use %s for loop variable |
740 | |
741 | (F) Only a simple scalar variable may be used as a loop variable on a foreach. |
742 | |
743 | =item Can't use %s ref as %s ref |
744 | |
745 | (F) You've mixed up your reference types. You have to dereference a |
746 | reference of the type needed. You can use the ref() function to |
747 | test the type of the reference, if need be. |
748 | |
748a9306 |
749 | =item Can't use \1 to mean $1 in expression |
750 | |
751 | (W) In an ordinary expression, backslash is a unary operator that creates |
752 | a reference to its argument. The use of backslash to indicate a backreference |
5f05dabc |
753 | to a matched substring is valid only as part of a regular expression pattern. |
748a9306 |
754 | Trying to do this in ordinary Perl code produces a value that prints |
755 | out looking like SCALAR(0xdecaf). Use the $1 form instead. |
756 | |
757 | =item Can't use string ("%s") as %s ref while "strict refs" in use |
a0d0e21e |
758 | |
759 | (F) Only hard references are allowed by "strict refs". Symbolic references |
760 | are disallowed. See L<perlref>. |
761 | |
762 | =item Can't use an undefined value as %s reference |
763 | |
764 | (F) A value used as either a hard reference or a symbolic reference must |
765 | be a defined value. This helps to de-lurk some insidious errors. |
766 | |
a0d0e21e |
767 | =item Can't use global %s in "my" |
768 | |
769 | (F) You tried to declare a magical variable as a lexical variable. This is |
5f05dabc |
770 | not allowed, because the magic can be tied to only one location (namely |
a0d0e21e |
771 | the global variable) and it would be incredibly confusing to have |
772 | variables in your program that looked like magical variables but |
773 | weren't. |
774 | |
748a9306 |
775 | =item Can't use subscript on %s |
776 | |
777 | (F) The compiler tried to interpret a bracketed expression as a |
778 | subscript. But to the left of the brackets was an expression that |
779 | didn't look like an array reference, or anything else subscriptable. |
780 | |
a0d0e21e |
781 | =item Can't write to temp file for B<-e>: %s |
782 | |
783 | (F) The write routine failed for some reason while trying to process |
784 | a B<-e> switch. Maybe your /tmp partition is full, or clobbered. |
785 | |
5f05dabc |
786 | =item Can't x= to read-only value |
a0d0e21e |
787 | |
788 | (F) You tried to repeat a constant value (often the undefined value) with |
789 | an assignment operator, which implies modifying the value itself. |
790 | Perhaps you need to copy the value to a temporary, and repeat that. |
791 | |
792 | =item Cannot open temporary file |
793 | |
8b1a09fc |
794 | (F) The create routine failed for some reason while trying to process |
a0d0e21e |
795 | a B<-e> switch. Maybe your /tmp partition is full, or clobbered. |
796 | |
797 | =item chmod: mode argument is missing initial 0 |
798 | |
799 | (W) A novice will sometimes say |
800 | |
801 | chmod 777, $filename |
802 | |
803 | not realizing that 777 will be interpreted as a decimal number, equivalent |
804 | to 01411. Octal constants are introduced with a leading 0 in Perl, as in C. |
805 | |
8b1a09fc |
806 | =item Close on unopened file E<lt>%sE<gt> |
a0d0e21e |
807 | |
808 | (W) You tried to close a filehandle that was never opened. |
809 | |
810 | =item connect() on closed fd |
811 | |
812 | (W) You tried to do a connect on a closed socket. Did you forget to check |
813 | the return value of your socket() call? See L<perlfunc/connect>. |
814 | |
815 | =item Corrupt malloc ptr 0x%lx at 0x%lx |
816 | |
817 | (P) The malloc package that comes with Perl had an internal failure. |
818 | |
819 | =item corrupted regexp pointers |
820 | |
821 | (P) The regular expression engine got confused by what the regular |
822 | expression compiler gave it. |
823 | |
824 | =item corrupted regexp program |
825 | |
826 | (P) The regular expression engine got passed a regexp program without |
827 | a valid magic number. |
828 | |
829 | =item Deep recursion on subroutine "%s" |
830 | |
831 | (W) This subroutine has called itself (directly or indirectly) 100 |
832 | times than it has returned. This probably indicates an infinite |
833 | recursion, unless you're writing strange benchmark programs, in which |
834 | case it indicates something else. |
835 | |
4633a7c4 |
836 | =item Did you mean &%s instead? |
837 | |
838 | (W) You probably referred to an imported subroutine &FOO as $FOO or some such. |
839 | |
748a9306 |
840 | =item Did you mean $ or @ instead of %? |
a0d0e21e |
841 | |
748a9306 |
842 | (W) You probably said %hash{$key} when you meant $hash{$key} or @hash{@keys}. |
843 | On the other hand, maybe you just meant %hash and got carried away. |
844 | |
7e1af8bc |
845 | =item Died |
5f05dabc |
846 | |
847 | (F) You passed die() an empty string (the equivalent of C<die "">) or |
848 | you called it with no args and both C<$@> and C<$_> were empty. |
849 | |
850 | =item Do you need to pre-declare %s? |
748a9306 |
851 | |
852 | (S) This is an educated guess made in conjunction with the message "%s |
853 | found where operator expected". It often means a subroutine or module |
854 | name is being referenced that hasn't been declared yet. This may be |
855 | because of ordering problems in your file, or because of a missing |
856 | "sub", "package", "require", or "use" statement. If you're |
857 | referencing something that isn't defined yet, you don't actually have |
858 | to define the subroutine or package before the current location. You |
859 | can use an empty "sub foo;" or "package FOO;" to enter a "forward" |
860 | declaration. |
a0d0e21e |
861 | |
862 | =item Don't know how to handle magic of type '%s' |
863 | |
864 | (P) The internal handling of magical variables has been cursed. |
865 | |
866 | =item do_study: out of memory |
867 | |
868 | (P) This should have been caught by safemalloc() instead. |
869 | |
870 | =item Duplicate free() ignored |
871 | |
872 | (S) An internal routine called free() on something that had already |
873 | been freed. |
874 | |
4633a7c4 |
875 | =item elseif should be elsif |
876 | |
877 | (S) There is no keyword "elseif" in Perl because Larry thinks it's |
878 | ugly. Your code will be interpreted as an attempt to call a method |
879 | named "elseif" for the class returned by the following block. This is |
880 | unlikely to be what you want. |
881 | |
a0d0e21e |
882 | =item END failed--cleanup aborted |
883 | |
884 | (F) An untrapped exception was raised while executing an END subroutine. |
885 | The interpreter is immediately exited. |
886 | |
748a9306 |
887 | =item Error converting file specification %s |
888 | |
5f05dabc |
889 | (F) An error peculiar to VMS. Because Perl may have to deal with file |
748a9306 |
890 | specifications in either VMS or Unix syntax, it converts them to a |
891 | single form when it must operate on them directly. Either you've |
892 | passed an invalid file specification to Perl, or you've found a |
893 | case the conversion routines don't handle. Drat. |
894 | |
a0d0e21e |
895 | =item Execution of %s aborted due to compilation errors. |
896 | |
897 | (F) The final summary message when a Perl compilation fails. |
898 | |
899 | =item Exiting eval via %s |
900 | |
8b1a09fc |
901 | (W) You are exiting an eval by unconventional means, such as |
a0d0e21e |
902 | a goto, or a loop control statement. |
903 | |
904 | =item Exiting subroutine via %s |
905 | |
8b1a09fc |
906 | (W) You are exiting a subroutine by unconventional means, such as |
a0d0e21e |
907 | a goto, or a loop control statement. |
908 | |
909 | =item Exiting substitution via %s |
910 | |
8b1a09fc |
911 | (W) You are exiting a substitution by unconventional means, such as |
a0d0e21e |
912 | a return, a goto, or a loop control statement. |
913 | |
748a9306 |
914 | =item Fatal VMS error at %s, line %d |
a0d0e21e |
915 | |
748a9306 |
916 | (P) An error peculiar to VMS. Something untoward happened in a VMS system |
917 | service or RTL routine; Perl's exit status should provide more details. The |
918 | filename in "at %s" and the line number in "line %d" tell you which section of |
919 | the Perl source code is distressed. |
a0d0e21e |
920 | |
921 | =item fcntl is not implemented |
922 | |
923 | (F) Your machine apparently doesn't implement fcntl(). What is this, a |
924 | PDP-11 or something? |
925 | |
926 | =item Filehandle %s never opened |
927 | |
928 | (W) An I/O operation was attempted on a filehandle that was never initialized. |
929 | You need to do an open() or a socket() call, or call a constructor from |
930 | the FileHandle package. |
931 | |
5f05dabc |
932 | =item Filehandle %s opened for only input |
a0d0e21e |
933 | |
934 | (W) You tried to write on a read-only filehandle. If you |
935 | intended it to be a read-write filehandle, you needed to open it with |
8b1a09fc |
936 | "+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If |
5f05dabc |
937 | you intended only to write the file, use "E<gt>" or "E<gt>E<gt>". See |
8b1a09fc |
938 | L<perlfunc/open>. |
a0d0e21e |
939 | |
5f05dabc |
940 | =item Filehandle opened for only input |
a0d0e21e |
941 | |
942 | (W) You tried to write on a read-only filehandle. If you |
943 | intended it to be a read-write filehandle, you needed to open it with |
8b1a09fc |
944 | "+E<lt>" or "+E<gt>" or "+E<gt>E<gt>" instead of with "E<lt>" or nothing. If |
5f05dabc |
945 | you intended only to write the file, use "E<gt>" or "E<gt>E<gt>". See |
8b1a09fc |
946 | L<perlfunc/open>. |
a0d0e21e |
947 | |
948 | =item Final $ should be \$ or $name |
949 | |
950 | (F) You must now decide whether the final $ in a string was meant to be |
951 | a literal dollar sign, or was meant to introduce a variable name |
952 | that happens to be missing. So you have to put either the backslash or |
953 | the name. |
954 | |
955 | =item Final @ should be \@ or @name |
956 | |
957 | (F) You must now decide whether the final @ in a string was meant to be |
958 | a literal "at" sign, or was meant to introduce a variable name |
959 | that happens to be missing. So you have to put either the backslash or |
960 | the name. |
961 | |
962 | =item Format %s redefined |
963 | |
964 | (W) You redefined a format. To suppress this warning, say |
965 | |
966 | { |
967 | local $^W = 0; |
968 | eval "format NAME =..."; |
969 | } |
970 | |
971 | =item Format not terminated |
972 | |
973 | (F) A format must be terminated by a line with a solitary dot. Perl got |
974 | to the end of your file without finding such a line. |
975 | |
976 | =item Found = in conditional, should be == |
977 | |
978 | (W) You said |
979 | |
980 | if ($foo = 123) |
981 | |
982 | when you meant |
983 | |
984 | if ($foo == 123) |
985 | |
986 | (or something like that). |
987 | |
988 | =item gdbm store returned %d, errno %d, key "%s" |
989 | |
990 | (S) A warning from the GDBM_File extension that a store failed. |
991 | |
992 | =item gethostent not implemented |
993 | |
994 | (F) Your C library apparently doesn't implement gethostent(), probably |
995 | because if it did, it'd feel morally obligated to return every hostname |
996 | on the Internet. |
997 | |
998 | =item get{sock,peer}name() on closed fd |
999 | |
1000 | (W) You tried to get a socket or peer socket name on a closed socket. |
1001 | Did you forget to check the return value of your socket() call? |
1002 | |
748a9306 |
1003 | =item getpwnam returned invalid UIC %#o for user "%s" |
1004 | |
1005 | (S) A warning peculiar to VMS. The call to C<sys$getuai> underlying the |
1006 | C<getpwnam> operator returned an invalid UIC. |
1007 | |
1008 | |
a0d0e21e |
1009 | =item Glob not terminated |
1010 | |
1011 | (F) The lexer saw a left angle bracket in a place where it was expecting |
1012 | a term, so it's looking for the corresponding right angle bracket, and not |
1013 | finding it. Chances are you left some needed parentheses out earlier in |
1014 | the line, and you really meant a "less than". |
1015 | |
1016 | =item Global symbol "%s" requires explicit package name |
1017 | |
1018 | (F) You've said "use strict vars", which indicates that all variables must |
1019 | either be lexically scoped (using "my"), or explicitly qualified to |
1020 | say which package the global variable is in (using "::"). |
1021 | |
1022 | =item goto must have label |
1023 | |
1024 | (F) Unlike with "next" or "last", you're not allowed to goto an |
1025 | unspecified destination. See L<perlfunc/goto>. |
1026 | |
1027 | =item Had to create %s unexpectedly |
1028 | |
1029 | (S) A routine asked for a symbol from a symbol table that ought to have |
1030 | existed already, but for some reason it didn't, and had to be created on |
1031 | an emergency basis to prevent a core dump. |
1032 | |
1033 | =item Hash %%s missing the % in argument %d of %s() |
1034 | |
1035 | (D) Really old Perl let you omit the % on hash names in some spots. This |
1036 | is now heavily deprecated. |
1037 | |
8b1a09fc |
1038 | =item Ill-formed logical name |%s| in prime_env_iter |
a0d0e21e |
1039 | |
8b1a09fc |
1040 | (W) A warning peculiar to VMS. A logical name was encountered when preparing |
1041 | to iterate over %ENV which violates the syntactic rules governing logical |
5f05dabc |
1042 | names. Because it cannot be translated normally, it is skipped, and will not |
1043 | appear in %ENV. This may be a benign occurrence, as some software packages |
8b1a09fc |
1044 | might directly modify logical name tables and introduce non-standard names, |
1045 | or it may indicate that a logical name table has been corrupted. |
a0d0e21e |
1046 | |
1047 | =item Illegal division by zero |
1048 | |
1049 | (F) You tried to divide a number by 0. Either something was wrong in your |
1050 | logic, or you need to put a conditional in to guard against meaningless input. |
1051 | |
1052 | =item Illegal modulus zero |
1053 | |
1054 | (F) You tried to divide a number by 0 to get the remainder. Most numbers |
1055 | don't take to this kindly. |
1056 | |
1057 | =item Illegal octal digit |
1058 | |
1059 | (F) You used an 8 or 9 in a octal number. |
1060 | |
748a9306 |
1061 | =item Illegal octal digit ignored |
1062 | |
1063 | (W) You may have tried to use an 8 or 9 in a octal number. Interpretation |
1064 | of the octal number stopped before the 8 or 9. |
1065 | |
a0d0e21e |
1066 | =item Insecure dependency in %s |
1067 | |
8b1a09fc |
1068 | (F) You tried to do something that the tainting mechanism didn't like. |
a0d0e21e |
1069 | The tainting mechanism is turned on when you're running setuid or setgid, |
1070 | or when you specify B<-T> to turn it on explicitly. The tainting mechanism |
1071 | labels all data that's derived directly or indirectly from the user, |
1072 | who is considered to be unworthy of your trust. If any such data is |
1073 | used in a "dangerous" operation, you get this error. See L<perlsec> |
1074 | for more information. |
1075 | |
1076 | =item Insecure directory in %s |
1077 | |
1078 | (F) You can't use system(), exec(), or a piped open in a setuid or setgid |
8b1a09fc |
1079 | script if C<$ENV{PATH}> contains a directory that is writable by the world. |
a0d0e21e |
1080 | See L<perlsec>. |
1081 | |
1082 | =item Insecure PATH |
1083 | |
1084 | (F) You can't use system(), exec(), or a piped open in a setuid or |
8b1a09fc |
1085 | setgid script if C<$ENV{PATH}> is derived from data supplied (or |
a0d0e21e |
1086 | potentially supplied) by the user. The script must set the path to a |
1087 | known value, using trustworthy data. See L<perlsec>. |
1088 | |
bbce6d69 |
1089 | =item Integer overflow in hex number |
1090 | |
1091 | (S) The literal hex number you have specified is too big for your |
1092 | architecture. On a 32-bit architecture the largest hex literal is |
1093 | 0xFFFFFFFF. |
1094 | |
1095 | =item Integer overflow in octal number |
1096 | |
1097 | (S) The literal octal number you have specified is too big for your |
1098 | architecture. On a 32-bit architecture the largest octal literal is |
1099 | 037777777777. |
1100 | |
748a9306 |
1101 | =item Internal inconsistency in tracking vforks |
1102 | |
1103 | (S) A warning peculiar to VMS. Perl keeps track of the number |
5f05dabc |
1104 | of times you've called C<fork> and C<exec>, to determine |
2ba9eb46 |
1105 | whether the current call to C<exec> should affect the current |
748a9306 |
1106 | script or a subprocess (see L<perlvms/exec>). Somehow, this count |
1107 | has become scrambled, so Perl is making a guess and treating |
1108 | this C<exec> as a request to terminate the Perl script |
1109 | and execute the specified command. |
1110 | |
a0d0e21e |
1111 | =item internal disaster in regexp |
1112 | |
1113 | (P) Something went badly wrong in the regular expression parser. |
1114 | |
1115 | =item internal urp in regexp at /%s/ |
1116 | |
1117 | (P) Something went badly awry in the regular expression parser. |
1118 | |
1119 | =item invalid [] range in regexp |
1120 | |
1121 | (F) The range specified in a character class had a minimum character |
1122 | greater than the maximum character. See L<perlre>. |
1123 | |
1124 | =item ioctl is not implemented |
1125 | |
1126 | (F) Your machine apparently doesn't implement ioctl(), which is pretty |
1127 | strange for a machine that supports C. |
1128 | |
1129 | =item junk on end of regexp |
1130 | |
1131 | (P) The regular expression parser is confused. |
1132 | |
1133 | =item Label not found for "last %s" |
1134 | |
1135 | (F) You named a loop to break out of, but you're not currently in a |
1136 | loop of that name, not even if you count where you were called from. |
1137 | See L<perlfunc/last>. |
1138 | |
1139 | =item Label not found for "next %s" |
1140 | |
1141 | (F) You named a loop to continue, but you're not currently in a loop of |
1142 | that name, not even if you count where you were called from. See |
1143 | L<perlfunc/last>. |
1144 | |
1145 | =item Label not found for "redo %s" |
1146 | |
1147 | (F) You named a loop to restart, but you're not currently in a loop of |
1148 | that name, not even if you count where you were called from. See |
1149 | L<perlfunc/last>. |
1150 | |
1151 | =item listen() on closed fd |
1152 | |
1153 | (W) You tried to do a listen on a closed socket. Did you forget to check |
1154 | the return value of your socket() call? See L<perlfunc/listen>. |
1155 | |
1156 | =item Literal @%s now requires backslash |
1157 | |
1158 | (F) It used to be that Perl would try to guess whether you wanted an |
1159 | array interpolated or a literal @. It did this when the string was |
1160 | first used at runtime. Now strings are parsed at compile time, and |
1161 | ambiguous instances of @ must be disambiguated, either by putting a |
1162 | backslash to indicate a literal, or by declaring (or using) the array |
1163 | within the program before the string (lexically). (Someday it will simply |
1164 | assume that an unbackslashed @ interpolates an array.) |
1165 | |
1166 | =item Method for operation %s not found in package %s during blessing |
1167 | |
1168 | (F) An attempt was made to specify an entry in an overloading table that |
8b1a09fc |
1169 | doesn't somehow point to a valid method. See L<overload>. |
a0d0e21e |
1170 | |
1171 | =item Might be a runaway multi-line %s string starting on line %d |
1172 | |
1173 | (S) An advisory indicating that the previous error may have been caused |
1174 | by a missing delimiter on a string or pattern, because it eventually |
1175 | ended earlier on the current line. |
1176 | |
1177 | =item Misplaced _ in number |
1178 | |
1179 | (W) An underline in a decimal constant wasn't on a 3-digit boundary. |
1180 | |
1181 | =item Missing $ on loop variable |
1182 | |
8b1a09fc |
1183 | (F) Apparently you've been programming in B<csh> too much. Variables are always |
1184 | mentioned with the $ in Perl, unlike in the shells, where it can vary from |
a0d0e21e |
1185 | one line to the next. |
1186 | |
1187 | =item Missing comma after first argument to %s function |
1188 | |
1189 | (F) While certain functions allow you to specify a filehandle or an |
1190 | "indirect object" before the argument list, this ain't one of them. |
1191 | |
748a9306 |
1192 | =item Missing operator before %s? |
1193 | |
1194 | (S) This is an educated guess made in conjunction with the message "%s |
1195 | found where operator expected". Often the missing operator is a comma. |
1196 | |
a0d0e21e |
1197 | =item Missing right bracket |
1198 | |
1199 | (F) The lexer counted more opening curly brackets (braces) than closing ones. |
1200 | As a general rule, you'll find it's missing near the place you were last |
1201 | editing. |
1202 | |
1203 | =item Missing semicolon on previous line? |
1204 | |
1205 | (S) This is an educated guess made in conjunction with the message "%s |
1206 | found where operator expected". Don't automatically put a semicolon on |
1207 | the previous line just because you saw this message. |
1208 | |
1209 | =item Modification of a read-only value attempted |
1210 | |
1211 | (F) You tried, directly or indirectly, to change the value of a |
5f05dabc |
1212 | constant. You didn't, of course, try "2 = 1", because the compiler |
a0d0e21e |
1213 | catches that. But an easy way to do the same thing is: |
1214 | |
1215 | sub mod { $_[0] = 1 } |
1216 | mod(2); |
1217 | |
1218 | Another way is to assign to a substr() that's off the end of the string. |
1219 | |
1220 | =item Modification of non-creatable array value attempted, subscript %d |
1221 | |
1222 | (F) You tried to make an array value spring into existence, and the |
1223 | subscript was probably negative, even counting from end of the array |
1224 | backwards. |
1225 | |
1226 | =item Modification of non-creatable hash value attempted, subscript "%s" |
1227 | |
1228 | (F) You tried to make a hash value spring into existence, and it couldn't |
1229 | be created for some peculiar reason. |
1230 | |
1231 | =item Module name must be constant |
1232 | |
1233 | (F) Only a bare module name is allowed as the first argument to a "use". |
1234 | |
1235 | =item msg%s not implemented |
1236 | |
1237 | (F) You don't have System V message IPC on your system. |
1238 | |
1239 | =item Multidimensional syntax %s not supported |
1240 | |
8b1a09fc |
1241 | (W) Multidimensional arrays aren't written like C<$foo[1,2,3]>. They're written |
1242 | like C<$foo[1][2][3]>, as in C. |
1243 | |
1244 | =item Name "%s::%s" used only once: possible typo |
1245 | |
1246 | (W) Typographical errors often show up as unique variable names. If you |
1247 | had a good reason for having a unique name, then just mention it |
1248 | again somehow to suppress the message (the C<use vars> pragma is |
1249 | provided for just this purpose). |
a0d0e21e |
1250 | |
1251 | =item Negative length |
1252 | |
1253 | (F) You tried to do a read/write/send/recv operation with a buffer length |
1254 | that is less than 0. This is difficult to imagine. |
1255 | |
1256 | =item nested *?+ in regexp |
1257 | |
5f05dabc |
1258 | (F) You can't quantify a quantifier without intervening parentheses. So |
a0d0e21e |
1259 | things like ** or +* or ?* are illegal. |
1260 | |
5f05dabc |
1261 | Note, however, that the minimal matching quantifiers, C<*?>, C<+?>, and C<??> appear |
a0d0e21e |
1262 | to be nested quantifiers, but aren't. See L<perlre>. |
1263 | |
1264 | =item No #! line |
1265 | |
1266 | (F) The setuid emulator requires that scripts have a well-formed #! line |
1267 | even on machines that don't support the #! construct. |
1268 | |
1269 | =item No %s allowed while running setuid |
1270 | |
1271 | (F) Certain operations are deemed to be too insecure for a setuid or setgid |
1272 | script to even be allowed to attempt. Generally speaking there will be |
1273 | another way to do what you want that is, if not secure, at least securable. |
1274 | See L<perlsec>. |
1275 | |
1276 | =item No B<-e> allowed in setuid scripts |
1277 | |
1278 | (F) A setuid script can't be specified by the user. |
1279 | |
1280 | =item No comma allowed after %s |
1281 | |
1282 | (F) A list operator that has a filehandle or "indirect object" is not |
1283 | allowed to have a comma between that and the following arguments. |
1284 | Otherwise it'd be just another one of the arguments. |
1285 | |
748a9306 |
1286 | =item No command into which to pipe on command line |
1287 | |
1288 | (F) An error peculiar to VMS. Perl handles its own command line redirection, |
1289 | and found a '|' at the end of the command line, so it doesn't know whither you |
1290 | want to pipe the output from this command. |
1291 | |
a0d0e21e |
1292 | =item No DB::DB routine defined |
1293 | |
1294 | (F) The currently executing code was compiled with the B<-d> switch, |
1295 | but for some reason the perl5db.pl file (or some facsimile thereof) |
1296 | didn't define a routine to be called at the beginning of each |
1297 | statement. Which is odd, because the file should have been required |
1298 | automatically, and should have blown up the require if it didn't parse |
1299 | right. |
1300 | |
1301 | =item No dbm on this machine |
1302 | |
1303 | (P) This is counted as an internal error, because every machine should |
5f05dabc |
1304 | supply dbm nowadays, because Perl comes with SDBM. See L<SDBM_File>. |
a0d0e21e |
1305 | |
1306 | =item No DBsub routine |
1307 | |
1308 | (F) The currently executing code was compiled with the B<-d> switch, |
1309 | but for some reason the perl5db.pl file (or some facsimile thereof) |
1310 | didn't define a DB::sub routine to be called at the beginning of each |
1311 | ordinary subroutine call. |
1312 | |
8b1a09fc |
1313 | =item No error file after 2E<gt> or 2E<gt>E<gt> on command line |
748a9306 |
1314 | |
1315 | (F) An error peculiar to VMS. Perl handles its own command line redirection, |
8b1a09fc |
1316 | and found a '2E<gt>' or a '2E<gt>E<gt>' on the command line, but can't find |
1317 | the name of the file to which to write data destined for stderr. |
748a9306 |
1318 | |
8b1a09fc |
1319 | =item No input file after E<lt> on command line |
748a9306 |
1320 | |
1321 | (F) An error peculiar to VMS. Perl handles its own command line redirection, |
8b1a09fc |
1322 | and found a 'E<lt>' on the command line, but can't find the name of the file |
1323 | from which to read data for stdin. |
748a9306 |
1324 | |
8b1a09fc |
1325 | =item No output file after E<gt> on command line |
748a9306 |
1326 | |
1327 | (F) An error peculiar to VMS. Perl handles its own command line redirection, |
8b1a09fc |
1328 | and found a lone 'E<gt>' at the end of the command line, so it doesn't know |
1329 | whither you wanted to redirect stdout. |
748a9306 |
1330 | |
8b1a09fc |
1331 | =item No output file after E<gt> or E<gt>E<gt> on command line |
748a9306 |
1332 | |
1333 | (F) An error peculiar to VMS. Perl handles its own command line redirection, |
8b1a09fc |
1334 | and found a 'E<gt>' or a 'E<gt>E<gt>' on the command line, but can't find the |
1335 | name of the file to which to write data destined for stdout. |
748a9306 |
1336 | |
a0d0e21e |
1337 | =item No Perl script found in input |
1338 | |
1339 | (F) You called C<perl -x>, but no line was found in the file beginning |
1340 | with #! and containing the word "perl". |
1341 | |
1342 | =item No setregid available |
1343 | |
1344 | (F) Configure didn't find anything resembling the setregid() call for |
1345 | your system. |
1346 | |
1347 | =item No setreuid available |
1348 | |
1349 | (F) Configure didn't find anything resembling the setreuid() call for |
1350 | your system. |
1351 | |
1352 | =item No space allowed after B<-I> |
1353 | |
1354 | (F) The argument to B<-I> must follow the B<-I> immediately with no |
1355 | intervening space. |
1356 | |
748a9306 |
1357 | =item No such pipe open |
1358 | |
1359 | (P) An error peculiar to VMS. The internal routine my_pclose() tried to |
1360 | close a pipe which hadn't been opened. This should have been caught earlier as |
1361 | an attempt to close an unopened filehandle. |
1362 | |
a0d0e21e |
1363 | =item No such signal: SIG%s |
1364 | |
1365 | (W) You specified a signal name as a subscript to %SIG that was not recognized. |
1366 | Say C<kill -l> in your shell to see the valid signal names on your system. |
1367 | |
1368 | =item Not a CODE reference |
1369 | |
1370 | (F) Perl was trying to evaluate a reference to a code value (that is, a |
1371 | subroutine), but found a reference to something else instead. You can |
1372 | use the ref() function to find out what kind of ref it really was. |
1373 | See also L<perlref>. |
1374 | |
1375 | =item Not a format reference |
1376 | |
1377 | (F) I'm not sure how you managed to generate a reference to an anonymous |
1378 | format, but this indicates you did, and that it didn't exist. |
1379 | |
1380 | =item Not a GLOB reference |
1381 | |
55497cff |
1382 | (F) Perl was trying to evaluate a reference to a "typeglob" (that is, |
a0d0e21e |
1383 | a symbol table entry that looks like C<*foo>), but found a reference to |
1384 | something else instead. You can use the ref() function to find out |
1385 | what kind of ref it really was. See L<perlref>. |
1386 | |
1387 | =item Not a HASH reference |
1388 | |
1389 | (F) Perl was trying to evaluate a reference to a hash value, but |
1390 | found a reference to something else instead. You can use the ref() |
1391 | function to find out what kind of ref it really was. See L<perlref>. |
1392 | |
1393 | =item Not a perl script |
1394 | |
1395 | (F) The setuid emulator requires that scripts have a well-formed #! line |
1396 | even on machines that don't support the #! construct. The line must |
1397 | mention perl. |
1398 | |
1399 | =item Not a SCALAR reference |
1400 | |
1401 | (F) Perl was trying to evaluate a reference to a scalar value, but |
1402 | found a reference to something else instead. You can use the ref() |
1403 | function to find out what kind of ref it really was. See L<perlref>. |
1404 | |
1405 | =item Not a subroutine reference |
1406 | |
1407 | (F) Perl was trying to evaluate a reference to a code value (that is, a |
1408 | subroutine), but found a reference to something else instead. You can |
1409 | use the ref() function to find out what kind of ref it really was. |
1410 | See also L<perlref>. |
1411 | |
1412 | =item Not a subroutine reference in %OVERLOAD |
1413 | |
1414 | (F) An attempt was made to specify an entry in an overloading table that |
8b1a09fc |
1415 | doesn't somehow point to a valid subroutine. See L<overload>. |
a0d0e21e |
1416 | |
1417 | =item Not an ARRAY reference |
1418 | |
1419 | (F) Perl was trying to evaluate a reference to an array value, but |
1420 | found a reference to something else instead. You can use the ref() |
1421 | function to find out what kind of ref it really was. See L<perlref>. |
1422 | |
1423 | =item Not enough arguments for %s |
1424 | |
1425 | (F) The function requires more arguments than you specified. |
1426 | |
1427 | =item Not enough format arguments |
1428 | |
1429 | (W) A format specified more picture fields than the next line supplied. |
1430 | See L<perlform>. |
1431 | |
1432 | =item Null filename used |
1433 | |
5f05dabc |
1434 | (F) You can't require the null filename, especially because on many machines |
a0d0e21e |
1435 | that means the current directory! See L<perlfunc/require>. |
1436 | |
55497cff |
1437 | =item Null picture in formline |
1438 | |
1439 | (F) The first argument to formline must be a valid format picture |
1440 | specification. It was found to be empty, which probably means you |
1441 | supplied it an uninitialized value. See L<perlform>. |
1442 | |
a0d0e21e |
1443 | =item NULL OP IN RUN |
1444 | |
1445 | (P) Some internal routine called run() with a null opcode pointer. |
1446 | |
1447 | =item Null realloc |
1448 | |
1449 | (P) An attempt was made to realloc NULL. |
1450 | |
1451 | =item NULL regexp argument |
1452 | |
5f05dabc |
1453 | (P) The internal pattern matching routines blew it big time. |
a0d0e21e |
1454 | |
1455 | =item NULL regexp parameter |
1456 | |
1457 | (P) The internal pattern matching routines are out of their gourd. |
1458 | |
1459 | =item Odd number of elements in hash list |
1460 | |
1461 | (S) You specified an odd number of elements to a hash list, which is odd, |
5f05dabc |
1462 | because hash lists come in key/value pairs. |
a0d0e21e |
1463 | |
bbce6d69 |
1464 | =item Offset outside string |
1465 | |
1466 | (F) You tried to do a read/write/send/recv operation with an offset |
1467 | pointing outside the buffer. This is difficult to imagine. |
1468 | The sole exception to this is that C<sysread()>ing past the buffer |
1469 | will extend the buffer and zero pad the new area. |
1470 | |
a0d0e21e |
1471 | =item oops: oopsAV |
1472 | |
1473 | (S) An internal warning that the grammar is screwed up. |
1474 | |
1475 | =item oops: oopsHV |
1476 | |
1477 | (S) An internal warning that the grammar is screwed up. |
1478 | |
1479 | =item Operation `%s' %s: no method found, |
1480 | |
1481 | (F) An attempt was made to use an entry in an overloading table that |
8b1a09fc |
1482 | somehow no longer points to a valid method. See L<overload>. |
a0d0e21e |
1483 | |
748a9306 |
1484 | =item Operator or semicolon missing before %s |
1485 | |
1486 | (S) You used a variable or subroutine call where the parser was |
1487 | expecting an operator. The parser has assumed you really meant |
1488 | to use an operator, but this is highly likely to be incorrect. |
1489 | For example, if you say "*foo *foo" it will be interpreted as |
1490 | if you said "*foo * 'foo'". |
1491 | |
a0d0e21e |
1492 | =item Out of memory for yacc stack |
1493 | |
1494 | (F) The yacc parser wanted to grow its stack so it could continue parsing, |
1495 | but realloc() wouldn't give it more memory, virtual or otherwise. |
1496 | |
1497 | =item Out of memory! |
1498 | |
55497cff |
1499 | (X|F) The malloc() function returned 0, indicating there was insufficient |
eff9c6e2 |
1500 | remaining memory (or virtual memory) to satisfy the request. |
1501 | |
1502 | The request was judged to be small, so the possibility to trap it |
1503 | depends on the way perl was compiled. By default it is not trappable. |
1504 | However, if compiled for this, Perl may use the contents of C<$^M> as |
1505 | an emergency pool after die()ing with this message. In this case the |
55497cff |
1506 | error is trappable I<once>. |
1507 | |
1508 | =item Out of memory during request for %s |
1509 | |
1510 | (F) The malloc() function returned 0, indicating there was insufficient |
1511 | remaining memory (or virtual memory) to satisfy the request. However, |
1512 | the request was judged large enough (compile-time default is 64K), so |
1513 | a possibility to shut down by trapping this error is granted. |
1514 | |
a0d0e21e |
1515 | =item page overflow |
1516 | |
1517 | (W) A single call to write() produced more lines than can fit on a page. |
1518 | See L<perlform>. |
1519 | |
1520 | =item panic: ck_grep |
1521 | |
1522 | (P) Failed an internal consistency check trying to compile a grep. |
1523 | |
1524 | =item panic: ck_split |
1525 | |
1526 | (P) Failed an internal consistency check trying to compile a split. |
1527 | |
1528 | =item panic: corrupt saved stack index |
1529 | |
1530 | (P) The savestack was requested to restore more localized values than there |
1531 | are in the savestack. |
1532 | |
1533 | =item panic: die %s |
1534 | |
1535 | (P) We popped the context stack to an eval context, and then discovered |
1536 | it wasn't an eval context. |
1537 | |
1538 | =item panic: do_match |
1539 | |
1540 | (P) The internal pp_match() routine was called with invalid operational data. |
1541 | |
1542 | =item panic: do_split |
1543 | |
1544 | (P) Something terrible went wrong in setting up for the split. |
1545 | |
1546 | =item panic: do_subst |
1547 | |
1548 | (P) The internal pp_subst() routine was called with invalid operational data. |
1549 | |
1550 | =item panic: do_trans |
1551 | |
1552 | (P) The internal do_trans() routine was called with invalid operational data. |
1553 | |
1554 | =item panic: goto |
1555 | |
1556 | (P) We popped the context stack to a context with the specified label, |
1557 | and then discovered it wasn't a context we know how to do a goto in. |
1558 | |
1559 | =item panic: INTERPCASEMOD |
1560 | |
1561 | (P) The lexer got into a bad state at a case modifier. |
1562 | |
1563 | =item panic: INTERPCONCAT |
1564 | |
1565 | (P) The lexer got into a bad state parsing a string with brackets. |
1566 | |
1567 | =item panic: last |
1568 | |
1569 | (P) We popped the context stack to a block context, and then discovered |
1570 | it wasn't a block context. |
1571 | |
1572 | =item panic: leave_scope clearsv |
1573 | |
5f05dabc |
1574 | (P) A writable lexical variable became read-only somehow within the scope. |
a0d0e21e |
1575 | |
1576 | =item panic: leave_scope inconsistency |
1577 | |
1578 | (P) The savestack probably got out of sync. At least, there was an |
1579 | invalid enum on the top of it. |
1580 | |
1581 | =item panic: malloc |
1582 | |
1583 | (P) Something requested a negative number of bytes of malloc. |
1584 | |
1585 | =item panic: mapstart |
1586 | |
1587 | (P) The compiler is screwed up with respect to the map() function. |
1588 | |
1589 | =item panic: null array |
1590 | |
1591 | (P) One of the internal array routines was passed a null AV pointer. |
1592 | |
1593 | =item panic: pad_alloc |
1594 | |
1595 | (P) The compiler got confused about which scratch pad it was allocating |
1596 | and freeing temporaries and lexicals from. |
1597 | |
1598 | =item panic: pad_free curpad |
1599 | |
1600 | (P) The compiler got confused about which scratch pad it was allocating |
1601 | and freeing temporaries and lexicals from. |
1602 | |
1603 | =item panic: pad_free po |
1604 | |
1605 | (P) An invalid scratch pad offset was detected internally. |
1606 | |
1607 | =item panic: pad_reset curpad |
1608 | |
1609 | (P) The compiler got confused about which scratch pad it was allocating |
1610 | and freeing temporaries and lexicals from. |
1611 | |
1612 | =item panic: pad_sv po |
1613 | |
1614 | (P) An invalid scratch pad offset was detected internally. |
1615 | |
1616 | =item panic: pad_swipe curpad |
1617 | |
1618 | (P) The compiler got confused about which scratch pad it was allocating |
1619 | and freeing temporaries and lexicals from. |
1620 | |
1621 | =item panic: pad_swipe po |
1622 | |
1623 | (P) An invalid scratch pad offset was detected internally. |
1624 | |
1625 | =item panic: pp_iter |
1626 | |
1627 | (P) The foreach iterator got called in a non-loop context frame. |
1628 | |
1629 | =item panic: realloc |
1630 | |
1631 | (P) Something requested a negative number of bytes of realloc. |
1632 | |
1633 | =item panic: restartop |
1634 | |
1635 | (P) Some internal routine requested a goto (or something like it), and |
1636 | didn't supply the destination. |
1637 | |
1638 | =item panic: return |
1639 | |
1640 | (P) We popped the context stack to a subroutine or eval context, and |
1641 | then discovered it wasn't a subroutine or eval context. |
1642 | |
1643 | =item panic: scan_num |
1644 | |
1645 | (P) scan_num() got called on something that wasn't a number. |
1646 | |
1647 | =item panic: sv_insert |
1648 | |
1649 | (P) The sv_insert() routine was told to remove more string than there |
1650 | was string. |
1651 | |
1652 | =item panic: top_env |
1653 | |
1654 | (P) The compiler attempted to do a goto, or something weird like that. |
1655 | |
1656 | =item panic: yylex |
1657 | |
1658 | (P) The lexer got into a bad state while processing a case modifier. |
1659 | |
5f05dabc |
1660 | =item Pareneses missing around "%s" list |
a0d0e21e |
1661 | |
1662 | (W) You said something like |
1663 | |
1664 | my $foo, $bar = @_; |
1665 | |
1666 | when you meant |
1667 | |
1668 | my ($foo, $bar) = @_; |
1669 | |
1670 | Remember that "my" and "local" bind closer than comma. |
1671 | |
1672 | =item Perl %3.3f required--this is only version %s, stopped |
1673 | |
1674 | (F) The module in question uses features of a version of Perl more recent |
1675 | than the currently running version. How long has it been since you upgraded, |
1676 | anyway? See L<perlfunc/require>. |
1677 | |
1678 | =item Permission denied |
1679 | |
1680 | (F) The setuid emulator in suidperl decided you were up to no good. |
1681 | |
748a9306 |
1682 | =item pid %d not a child |
1683 | |
1684 | (W) A warning peculiar to VMS. Waitpid() was asked to wait for a process which |
1685 | isn't a subprocess of the current process. While this is fine from VMS' |
1686 | perspective, it's probably not what you intended. |
1687 | |
a0d0e21e |
1688 | =item POSIX getpgrp can't take an argument |
1689 | |
1690 | (F) Your C compiler uses POSIX getpgrp(), which takes no argument, unlike |
1691 | the BSD version, which takes a pid. |
1692 | |
bbce6d69 |
1693 | =item Possible attempt to put comments in qw() list |
1694 | |
5f05dabc |
1695 | (W) You probably wrote something like this: |
bbce6d69 |
1696 | |
1697 | qw( a # a comment |
1698 | b # another comment |
1699 | ) ; |
1700 | |
1701 | when you should have written this: |
1702 | |
1703 | qw( a |
1704 | b |
1705 | ) ; |
1706 | |
1707 | =item Possible attempt to separate words with commas |
1708 | |
5f05dabc |
1709 | (W) You probably wrote something like this: |
bbce6d69 |
1710 | |
1711 | qw( a, b, c ); |
1712 | |
1713 | when you should have written this: |
1714 | |
1715 | qw( a b c ); |
1716 | |
a0d0e21e |
1717 | =item Possible memory corruption: %s overflowed 3rd argument |
1718 | |
1719 | (F) An ioctl() or fcntl() returned more than Perl was bargaining for. |
1720 | Perl guesses a reasonable buffer size, but puts a sentinel byte at the |
1721 | end of the buffer just in case. This sentinel byte got clobbered, and |
1722 | Perl assumes that memory is now corrupted. See L<perlfunc/ioctl>. |
1723 | |
1724 | =item Precedence problem: open %s should be open(%s) |
1725 | |
1726 | (S) The old irregular construct |
cb1a09d0 |
1727 | |
a0d0e21e |
1728 | open FOO || die; |
1729 | |
1730 | is now misinterpreted as |
1731 | |
1732 | open(FOO || die); |
1733 | |
1734 | because of the strict regularization of Perl 5's grammar into unary and |
1735 | list operators. (The old open was a little of both.) You must put |
5f05dabc |
1736 | parentheses around the filehandle, or use the new "or" operator instead of "||". |
a0d0e21e |
1737 | |
1738 | =item print on closed filehandle %s |
1739 | |
1740 | (W) The filehandle you're printing on got itself closed sometime before now. |
1741 | Check your logic flow. |
1742 | |
1743 | =item printf on closed filehandle %s |
1744 | |
1745 | (W) The filehandle you're writing to got itself closed sometime before now. |
1746 | Check your logic flow. |
1747 | |
1748 | =item Probable precedence problem on %s |
1749 | |
1750 | (W) The compiler found a bare word where it expected a conditional, |
1751 | which often indicates that an || or && was parsed as part of the |
1752 | last argument of the previous construct, for example: |
1753 | |
1754 | open FOO || die; |
1755 | |
4633a7c4 |
1756 | =item Prototype mismatch: (%s) vs (%s) |
1757 | |
5f05dabc |
1758 | (S) The subroutine being defined had a pre-declared (forward) declaration |
4633a7c4 |
1759 | with a different function prototype. |
1760 | |
8b1a09fc |
1761 | =item Read on closed filehandle E<lt>%sE<gt> |
a0d0e21e |
1762 | |
1763 | (W) The filehandle you're reading from got itself closed sometime before now. |
1764 | Check your logic flow. |
1765 | |
1766 | =item Reallocation too large: %lx |
1767 | |
1768 | (F) You can't allocate more than 64K on an MSDOS machine. |
1769 | |
1770 | =item Recompile perl with B<-D>DEBUGGING to use B<-D> switch |
1771 | |
1772 | (F) You can't use the B<-D> option unless the code to produce the |
1773 | desired output is compiled into Perl, which entails some overhead, |
1774 | which is why it's currently left out of your copy. |
1775 | |
1776 | =item Recursive inheritance detected |
1777 | |
1778 | (F) More than 100 levels of inheritance were used. Probably indicates |
1779 | an unintended loop in your inheritance hierarchy. |
1780 | |
1781 | =item Reference miscount in sv_replace() |
1782 | |
1783 | (W) The internal sv_replace() function was handed a new SV with a |
1784 | reference count of other than 1. |
1785 | |
1786 | =item regexp memory corruption |
1787 | |
1788 | (P) The regular expression engine got confused by what the regular |
1789 | expression compiler gave it. |
1790 | |
1791 | =item regexp out of space |
1792 | |
1793 | (P) A "can't happen" error, because safemalloc() should have caught it earlier. |
1794 | |
1795 | =item regexp too big |
1796 | |
2ba9eb46 |
1797 | (F) The current implementation of regular expressions uses shorts as |
a0d0e21e |
1798 | address offsets within a string. Unfortunately this means that if |
1799 | the regular expression compiles to longer than 32767, it'll blow up. |
1800 | Usually when you want a regular expression this big, there is a better |
1801 | way to do it with multiple statements. See L<perlre>. |
1802 | |
1803 | =item Reversed %s= operator |
1804 | |
1805 | (W) You wrote your assignment operator backwards. The = must always |
1806 | comes last, to avoid ambiguity with subsequent unary operators. |
1807 | |
1808 | =item Runaway format |
1809 | |
1810 | (F) Your format contained the ~~ repeat-until-blank sequence, but it |
1811 | produced 200 lines at once, and the 200th line looked exactly like the |
1812 | 199th line. Apparently you didn't arrange for the arguments to exhaust |
1813 | themselves, either by using ^ instead of @ (for scalar variables), or by |
1814 | shifting or popping (for array variables). See L<perlform>. |
1815 | |
1816 | =item Scalar value @%s[%s] better written as $%s[%s] |
1817 | |
1818 | (W) You've used an array slice (indicated by @) to select a single value of |
1819 | an array. Generally it's better to ask for a scalar value (indicated by $). |
8b1a09fc |
1820 | The difference is that C<$foo[&bar]> always behaves like a scalar, both when |
1821 | assigning to it and when evaluating its argument, while C<@foo[&bar]> behaves |
a0d0e21e |
1822 | like a list when you assign to it, and provides a list context to its |
5f05dabc |
1823 | subscript, which can do weird things if you're expecting only one subscript. |
a0d0e21e |
1824 | |
748a9306 |
1825 | On the other hand, if you were actually hoping to treat the array |
5f05dabc |
1826 | element as a list, you need to look into how references work, because |
748a9306 |
1827 | Perl will not magically convert between scalars and lists for you. See |
1828 | L<perlref>. |
1829 | |
a0d0e21e |
1830 | =item Script is not setuid/setgid in suidperl |
1831 | |
1832 | (F) Oddly, the suidperl program was invoked on a script with its setuid |
8b1a09fc |
1833 | or setgid bit not set. This doesn't make much sense. |
a0d0e21e |
1834 | |
1835 | =item Search pattern not terminated |
1836 | |
1837 | (F) The lexer couldn't find the final delimiter of a // or m{} |
1838 | construct. Remember that bracketing delimiters count nesting level. |
1839 | |
1840 | =item seek() on unopened file |
1841 | |
1842 | (W) You tried to use the seek() function on a filehandle that was either |
1843 | never opened or has been closed since. |
1844 | |
1845 | =item select not implemented |
1846 | |
1847 | (F) This machine doesn't implement the select() system call. |
1848 | |
1849 | =item sem%s not implemented |
1850 | |
1851 | (F) You don't have System V semaphore IPC on your system. |
1852 | |
1853 | =item semi-panic: attempt to dup freed string |
1854 | |
1855 | (S) The internal newSVsv() routine was called to duplicate a scalar |
1856 | that had previously been marked as free. |
1857 | |
1858 | =item Semicolon seems to be missing |
1859 | |
1860 | (W) A nearby syntax error was probably caused by a missing semicolon, |
1861 | or possibly some other missing operator, such as a comma. |
1862 | |
1863 | =item Send on closed socket |
1864 | |
1865 | (W) The filehandle you're sending to got itself closed sometime before now. |
1866 | Check your logic flow. |
1867 | |
1868 | =item Sequence (?#... not terminated |
1869 | |
1870 | (F) A regular expression comment must be terminated by a closing |
5f05dabc |
1871 | parenthesis. Embedded parentheses aren't allowed. See L<perlre>. |
a0d0e21e |
1872 | |
1873 | =item Sequence (?%s...) not implemented |
1874 | |
1875 | (F) A proposed regular expression extension has the character reserved |
1876 | but has not yet been written. See L<perlre>. |
1877 | |
1878 | =item Sequence (?%s...) not recognized |
1879 | |
1880 | (F) You used a regular expression extension that doesn't make sense. |
1881 | See L<perlre>. |
1882 | |
a5f75d66 |
1883 | =item Server error |
1884 | |
1885 | Also known as "500 Server error". This is a CGI error, not a Perl |
1886 | error. You need to make sure your script is executable, is accessible |
1887 | by the user CGI is running the script under (which is probably not |
1888 | the user account you tested it under), does not rely on any environment |
1889 | variables (like PATH) from the user it isn't running under, and isn't |
1890 | in a location where the CGI server can't find it, basically, more or less. |
1891 | |
a0d0e21e |
1892 | =item setegid() not implemented |
1893 | |
8b1a09fc |
1894 | (F) You tried to assign to C<$)>, and your operating system doesn't support |
a0d0e21e |
1895 | the setegid() system call (or equivalent), or at least Configure didn't |
1896 | think so. |
1897 | |
1898 | =item seteuid() not implemented |
1899 | |
8b1a09fc |
1900 | (F) You tried to assign to C<$E<gt>>, and your operating system doesn't support |
a0d0e21e |
1901 | the seteuid() system call (or equivalent), or at least Configure didn't |
1902 | think so. |
1903 | |
1904 | =item setrgid() not implemented |
1905 | |
8b1a09fc |
1906 | (F) You tried to assign to C<$(>, and your operating system doesn't support |
a0d0e21e |
1907 | the setrgid() system call (or equivalent), or at least Configure didn't |
1908 | think so. |
1909 | |
1910 | =item setruid() not implemented |
1911 | |
8b1a09fc |
1912 | (F) You tried to assign to C<$<lt>>, and your operating system doesn't support |
a0d0e21e |
1913 | the setruid() system call (or equivalent), or at least Configure didn't |
1914 | think so. |
1915 | |
1916 | =item Setuid/gid script is writable by world |
1917 | |
1918 | (F) The setuid emulator won't run a script that is writable by the world, |
1919 | because the world might have written on it already. |
1920 | |
1921 | =item shm%s not implemented |
1922 | |
1923 | (F) You don't have System V shared memory IPC on your system. |
1924 | |
1925 | =item shutdown() on closed fd |
1926 | |
1927 | (W) You tried to do a shutdown on a closed socket. Seems a bit superfluous. |
1928 | |
1929 | =item SIG%s handler "%s" not defined. |
1930 | |
1931 | (W) The signal handler named in %SIG doesn't, in fact, exist. Perhaps you |
1932 | put it into the wrong package? |
1933 | |
1934 | =item sort is now a reserved word |
1935 | |
1936 | (F) An ancient error message that almost nobody ever runs into anymore. |
1937 | But before sort was a keyword, people sometimes used it as a filehandle. |
1938 | |
1939 | =item Sort subroutine didn't return a numeric value |
1940 | |
1941 | (F) A sort comparison routine must return a number. You probably blew |
4633a7c4 |
1942 | it by not using C<E<lt>=E<gt>> or C<cmp>, or by not using them correctly. |
a0d0e21e |
1943 | See L<perlfunc/sort>. |
1944 | |
1945 | =item Sort subroutine didn't return single value |
1946 | |
1947 | (F) A sort comparison subroutine may not return a list value with more |
1948 | or less than one element. See L<perlfunc/sort>. |
1949 | |
1950 | =item Split loop |
1951 | |
1952 | (P) The split was looping infinitely. (Obviously, a split shouldn't iterate |
1953 | more times than there are characters of input, which is what happened.) |
1954 | See L<perlfunc/split>. |
1955 | |
8b1a09fc |
1956 | =item Stat on unopened file E<lt>%sE<gt> |
a0d0e21e |
1957 | |
1958 | (W) You tried to use the stat() function (or an equivalent file test) |
1959 | on a filehandle that was either never opened or has been closed since. |
1960 | |
1961 | =item Statement unlikely to be reached |
1962 | |
1963 | (W) You did an exec() with some statement after it other than a die(). |
1964 | This is almost always an error, because exec() never returns unless |
1965 | there was a failure. You probably wanted to use system() instead, |
1966 | which does return. To suppress this warning, put the exec() in a block |
1967 | by itself. |
1968 | |
1969 | =item Subroutine %s redefined |
1970 | |
1971 | (W) You redefined a subroutine. To suppress this warning, say |
1972 | |
1973 | { |
1974 | local $^W = 0; |
1975 | eval "sub name { ... }"; |
1976 | } |
1977 | |
1978 | =item Substitution loop |
1979 | |
1980 | (P) The substitution was looping infinitely. (Obviously, a |
1981 | substitution shouldn't iterate more times than there are characters of |
1982 | input, which is what happened.) See the discussion of substitution in |
5f05dabc |
1983 | L<perlop/"Quote and Quote-like Operators">. |
a0d0e21e |
1984 | |
1985 | =item Substitution pattern not terminated |
1986 | |
1987 | (F) The lexer couldn't find the interior delimiter of a s/// or s{}{} |
1988 | construct. Remember that bracketing delimiters count nesting level. |
1989 | |
1990 | =item Substitution replacement not terminated |
1991 | |
1992 | (F) The lexer couldn't find the final delimiter of a s/// or s{}{} |
1993 | construct. Remember that bracketing delimiters count nesting level. |
1994 | |
1995 | =item substr outside of string |
1996 | |
1997 | (W) You tried to reference a substr() that pointed outside of a string. |
1998 | That is, the absolute value of the offset was larger than the length of |
1999 | the string. See L<perlfunc/substr>. |
2000 | |
2001 | =item suidperl is no longer needed since... |
2002 | |
2003 | (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a |
2004 | version of the setuid emulator somehow got run anyway. |
2005 | |
2006 | =item syntax error |
2007 | |
2008 | (F) Probably means you had a syntax error. Common reasons include: |
2009 | |
2010 | A keyword is misspelled. |
2011 | A semicolon is missing. |
2012 | A comma is missing. |
2013 | An opening or closing parenthesis is missing. |
2014 | An opening or closing brace is missing. |
2015 | A closing quote is missing. |
2016 | |
2017 | Often there will be another error message associated with the syntax |
2018 | error giving more information. (Sometimes it helps to turn on B<-w>.) |
2019 | The error message itself often tells you where it was in the line when |
2020 | it decided to give up. Sometimes the actual error is several tokens |
5f05dabc |
2021 | before this, because Perl is good at understanding random input. |
a0d0e21e |
2022 | Occasionally the line number may be misleading, and once in a blue moon |
2023 | the only way to figure out what's triggering the error is to call |
2024 | C<perl -c> repeatedly, chopping away half the program each time to see |
2025 | if the error went away. Sort of the cybernetic version of S<20 questions>. |
2026 | |
cb1a09d0 |
2027 | =item syntax error at line %d: `%s' unexpected |
2028 | |
8b1a09fc |
2029 | (A) You've accidentally run your script through the Bourne shell |
2030 | instead of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 |
2031 | into Perl yourself. |
2032 | |
a0d0e21e |
2033 | =item System V IPC is not implemented on this machine |
2034 | |
5f05dabc |
2035 | (F) You tried to do something with a function beginning with "sem", "shm", |
a0d0e21e |
2036 | or "msg". See L<perlfunc/semctl>, for example. |
2037 | |
2038 | =item Syswrite on closed filehandle |
2039 | |
2040 | (W) The filehandle you're writing to got itself closed sometime before now. |
2041 | Check your logic flow. |
2042 | |
2043 | =item tell() on unopened file |
2044 | |
2045 | (W) You tried to use the tell() function on a filehandle that was either |
2046 | never opened or has been closed since. |
2047 | |
8b1a09fc |
2048 | =item Test on unopened file E<lt>%sE<gt> |
a0d0e21e |
2049 | |
2050 | (W) You tried to invoke a file test operator on a filehandle that isn't |
2051 | open. Check your logic. See also L<perlfunc/-X>. |
2052 | |
2053 | =item That use of $[ is unsupported |
2054 | |
8b1a09fc |
2055 | (F) Assignment to C<$[> is now strictly circumscribed, and interpreted as |
5f05dabc |
2056 | a compiler directive. You may say only one of |
a0d0e21e |
2057 | |
2058 | $[ = 0; |
2059 | $[ = 1; |
2060 | ... |
2061 | local $[ = 0; |
2062 | local $[ = 1; |
2063 | ... |
2064 | |
2065 | This is to prevent the problem of one module changing the array base |
2066 | out from under another module inadvertently. See L<perlvar/$[>. |
2067 | |
2068 | =item The %s function is unimplemented |
2069 | |
2070 | The function indicated isn't implemented on this architecture, according |
2071 | to the probings of Configure. |
2072 | |
2073 | =item The crypt() function is unimplemented due to excessive paranoia. |
2074 | |
2075 | (F) Configure couldn't find the crypt() function on your machine, |
2076 | probably because your vendor didn't supply it, probably because they |
8b1a09fc |
2077 | think the U.S. Government thinks it's a secret, or at least that they |
a0d0e21e |
2078 | will continue to pretend that it is. And if you quote me on that, I |
2079 | will deny it. |
2080 | |
2081 | =item The stat preceding C<-l _> wasn't an lstat |
2082 | |
2083 | (F) It makes no sense to test the current stat buffer for symbolic linkhood |
2084 | if the last stat that wrote to the stat buffer already went past |
2085 | the symlink to get to the real file. Use an actual filename instead. |
2086 | |
2087 | =item times not implemented |
2088 | |
2089 | (F) Your version of the C library apparently doesn't do times(). I suspect |
2090 | you're not running on Unix. |
2091 | |
2092 | =item Too few args to syscall |
2093 | |
2094 | (F) There has to be at least one argument to syscall() to specify the |
2095 | system call to call, silly dilly. |
2096 | |
cb1a09d0 |
2097 | =item Too many ('s |
2098 | |
2099 | =item Too many )'s |
2100 | |
2101 | (A) You've accidentally run your script through B<csh> instead |
8b1a09fc |
2102 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 |
2103 | into Perl yourself. |
2104 | |
a0d0e21e |
2105 | =item Too many args to syscall |
2106 | |
5f05dabc |
2107 | (F) Perl supports a maximum of only 14 args to syscall(). |
a0d0e21e |
2108 | |
2109 | =item Too many arguments for %s |
2110 | |
2111 | (F) The function requires fewer arguments than you specified. |
2112 | |
2113 | =item trailing \ in regexp |
2114 | |
2115 | (F) The regular expression ends with an unbackslashed backslash. Backslash |
2116 | it. See L<perlre>. |
2117 | |
2118 | =item Translation pattern not terminated |
2119 | |
2120 | (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] |
2121 | construct. |
2122 | |
2123 | =item Translation replacement not terminated |
2124 | |
2125 | (F) The lexer couldn't find the final delimiter of a tr/// or tr[][] |
2126 | construct. |
2127 | |
2128 | =item truncate not implemented |
2129 | |
2130 | (F) Your machine doesn't implement a file truncation mechanism that |
2131 | Configure knows about. |
2132 | |
2133 | =item Type of arg %d to %s must be %s (not %s) |
2134 | |
2135 | (F) This function requires the argument in that position to be of a |
8b1a09fc |
2136 | certain type. Arrays must be @NAME or C<@{EXPR}>. Hashes must be |
2137 | %NAME or C<%{EXPR}>. No implicit dereferencing is allowed--use the |
a0d0e21e |
2138 | {EXPR} forms as an explicit dereference. See L<perlref>. |
2139 | |
2140 | =item umask: argument is missing initial 0 |
2141 | |
5f05dabc |
2142 | (W) A umask of 222 is incorrect. It should be 0222, because octal literals |
a0d0e21e |
2143 | always start with 0 in Perl, as in C. |
2144 | |
4633a7c4 |
2145 | =item Unable to create sub named "%s" |
2146 | |
2147 | (F) You attempted to create or access a subroutine with an illegal name. |
2148 | |
a0d0e21e |
2149 | =item Unbalanced context: %d more PUSHes than POPs |
2150 | |
2151 | (W) The exit code detected an internal inconsistency in how many execution |
2152 | contexts were entered and left. |
2153 | |
2154 | =item Unbalanced saves: %d more saves than restores |
2155 | |
2156 | (W) The exit code detected an internal inconsistency in how many |
2157 | values were temporarily localized. |
2158 | |
2159 | =item Unbalanced scopes: %d more ENTERs than LEAVEs |
2160 | |
2161 | (W) The exit code detected an internal inconsistency in how many blocks |
2162 | were entered and left. |
2163 | |
2164 | =item Unbalanced tmps: %d more allocs than frees |
2165 | |
2166 | (W) The exit code detected an internal inconsistency in how many mortal |
2167 | scalars were allocated and freed. |
2168 | |
2169 | =item Undefined format "%s" called |
2170 | |
2171 | (F) The format indicated doesn't seem to exist. Perhaps it's really in |
2172 | another package? See L<perlform>. |
2173 | |
2174 | =item Undefined sort subroutine "%s" called |
2175 | |
2176 | (F) The sort comparison routine specified doesn't seem to exist. Perhaps |
2177 | it's in a different package? See L<perlfunc/sort>. |
2178 | |
2179 | =item Undefined subroutine &%s called |
2180 | |
2181 | (F) The subroutine indicated hasn't been defined, or if it was, it |
2182 | has since been undefined. |
2183 | |
2184 | =item Undefined subroutine called |
2185 | |
2186 | (F) The anonymous subroutine you're trying to call hasn't been defined, |
2187 | or if it was, it has since been undefined. |
2188 | |
2189 | =item Undefined subroutine in sort |
2190 | |
2191 | (F) The sort comparison routine specified is declared but doesn't seem to |
2192 | have been defined yet. See L<perlfunc/sort>. |
2193 | |
4633a7c4 |
2194 | =item Undefined top format "%s" called |
2195 | |
2196 | (F) The format indicated doesn't seem to exist. Perhaps it's really in |
2197 | another package? See L<perlform>. |
2198 | |
a0d0e21e |
2199 | =item unexec of %s into %s failed! |
2200 | |
2201 | (F) The unexec() routine failed for some reason. See your local FSF |
2202 | representative, who probably put it there in the first place. |
2203 | |
2204 | =item Unknown BYTEORDER |
2205 | |
5f05dabc |
2206 | (F) There are no byte-swapping functions for a machine with this byte order. |
a0d0e21e |
2207 | |
2208 | =item unmatched () in regexp |
2209 | |
2210 | (F) Unbackslashed parentheses must always be balanced in regular |
2211 | expressions. If you're a vi user, the % key is valuable for finding |
5f05dabc |
2212 | the matching parenthesis. See L<perlre>. |
a0d0e21e |
2213 | |
2214 | =item Unmatched right bracket |
2215 | |
2216 | (F) The lexer counted more closing curly brackets (braces) than opening |
2217 | ones, so you're probably missing an opening bracket. As a general |
2218 | rule, you'll find the missing one (so to speak) near the place you were |
2219 | last editing. |
2220 | |
2221 | =item unmatched [] in regexp |
2222 | |
2223 | (F) The brackets around a character class must match. If you wish to |
2224 | include a closing bracket in a character class, backslash it or put it first. |
2225 | See L<perlre>. |
2226 | |
2227 | =item Unquoted string "%s" may clash with future reserved word |
2228 | |
2229 | (W) You used a bare word that might someday be claimed as a reserved word. |
2230 | It's best to put such a word in quotes, or capitalize it somehow, or insert |
2231 | an underbar into it. You might also declare it as a subroutine. |
2232 | |
2233 | =item Unrecognized character \%03o ignored |
2234 | |
2235 | (S) A garbage character was found in the input, and ignored, in case it's |
2236 | a weird control character on an EBCDIC machine, or some such. |
2237 | |
2238 | =item Unrecognized signal name "%s" |
2239 | |
2240 | (F) You specified a signal name to the kill() function that was not recognized. |
2241 | Say C<kill -l> in your shell to see the valid signal names on your system. |
2242 | |
2243 | =item Unrecognized switch: -%s |
2244 | |
2245 | (F) You specified an illegal option to Perl. Don't do that. |
2246 | (If you think you didn't do that, check the #! line to see if it's |
2247 | supplying the bad switch on your behalf.) |
2248 | |
2249 | =item Unsuccessful %s on filename containing newline |
2250 | |
2251 | (W) A file operation was attempted on a filename, and that operation |
2252 | failed, PROBABLY because the filename contained a newline, PROBABLY |
2253 | because you forgot to chop() or chomp() it off. See L<perlfunc/chop>. |
2254 | |
2255 | =item Unsupported directory function "%s" called |
2256 | |
2257 | (F) Your machine doesn't support opendir() and readdir(). |
2258 | |
2259 | =item Unsupported function %s |
2260 | |
2261 | (F) This machines doesn't implement the indicated function, apparently. |
2262 | At least, Configure doesn't think so. |
2263 | |
2264 | =item Unsupported socket function "%s" called |
2265 | |
2266 | (F) Your machine doesn't support the Berkeley socket mechanism, or at |
2267 | least that's what Configure thought. |
2268 | |
8b1a09fc |
2269 | =item Unterminated E<lt>E<gt> operator |
a0d0e21e |
2270 | |
2271 | (F) The lexer saw a left angle bracket in a place where it was expecting |
2272 | a term, so it's looking for the corresponding right angle bracket, and not |
2273 | finding it. Chances are you left some needed parentheses out earlier in |
2274 | the line, and you really meant a "less than". |
2275 | |
2276 | =item Use of $# is deprecated |
2277 | |
8b1a09fc |
2278 | (D) This was an ill-advised attempt to emulate a poorly defined B<awk> feature. |
a0d0e21e |
2279 | Use an explicit printf() or sprintf() instead. |
2280 | |
2281 | =item Use of $* is deprecated |
2282 | |
5f05dabc |
2283 | (D) This variable magically turned on multi-line pattern matching, both for |
a0d0e21e |
2284 | you and for any luckless subroutine that you happen to call. You should |
2285 | use the new C<//m> and C<//s> modifiers now to do that without the dangerous |
2286 | action-at-a-distance effects of C<$*>. |
2287 | |
748a9306 |
2288 | =item Use of %s in printf format not supported |
2289 | |
5f05dabc |
2290 | (F) You attempted to use a feature of printf that is accessible from |
2291 | only C. This usually means there's a better way to do it in Perl. |
748a9306 |
2292 | |
a0d0e21e |
2293 | =item Use of %s is deprecated |
2294 | |
2295 | (D) The construct indicated is no longer recommended for use, generally |
2296 | because there's a better way to do it, and also because the old way has |
2297 | bad side effects. |
2298 | |
8b1a09fc |
2299 | =item Use of bare E<lt>E<lt> to mean E<lt>E<lt>"" is deprecated |
4633a7c4 |
2300 | |
2301 | (D) You are now encouraged to use the explicitly quoted form if you |
2302 | wish to use a blank line as the terminator of the here-document. |
2303 | |
a0d0e21e |
2304 | =item Use of implicit split to @_ is deprecated |
2305 | |
2306 | (D) It makes a lot of work for the compiler when you clobber a |
2307 | subroutine's argument list, so it's better if you assign the results of |
2308 | a split() explicitly to an array (or list). |
2309 | |
2310 | =item Use of uninitialized value |
2311 | |
2312 | (W) An undefined value was used as if it were already defined. It was |
2313 | interpreted as a "" or a 0, but maybe it was a mistake. To suppress this |
2314 | warning assign an initial value to your variables. |
2315 | |
2316 | =item Useless use of %s in void context |
2317 | |
2318 | (W) You did something without a side effect in a context that does nothing |
2319 | with the return value, such as a statement that doesn't return a value |
2320 | from a block, or the left side of a scalar comma operator. Very often |
2321 | this points not to stupidity on your part, but a failure of Perl to parse |
2322 | your program the way you thought it would. For example, you'd get this |
2323 | if you mixed up your C precedence with Python precedence and said |
2324 | |
2325 | $one, $two = 1, 2; |
2326 | |
2327 | when you meant to say |
2328 | |
2329 | ($one, $two) = (1, 2); |
2330 | |
748a9306 |
2331 | Another common error is to use ordinary parentheses to construct a list |
2332 | reference when you should be using square or curly brackets, for |
2333 | example, if you say |
2334 | |
2335 | $array = (1,2); |
2336 | |
2337 | when you should have said |
2338 | |
2339 | $array = [1,2]; |
2340 | |
2341 | The square brackets explicitly turn a list value into a scalar value, |
2342 | while parentheses do not. So when a parenthesized list is evaluated in |
2343 | a scalar context, the comma is treated like C's comma operator, which |
2344 | throws away the left argument, which is not what you want. See |
2345 | L<perlref> for more on this. |
2346 | |
55497cff |
2347 | =item untie attempted while %d inner references still exist |
2348 | |
2349 | (W) A copy of the object returned from C<tie> (or C<tied>) was still |
2350 | valid when C<untie> was called. |
2351 | |
4633a7c4 |
2352 | =item Variable "%s" is not exported |
2353 | |
2354 | (F) While "use strict" in effect, you referred to a global variable |
2355 | that you apparently thought was imported from another module, because |
2356 | something else of the same name (usually a subroutine) is exported |
2357 | by that module. It usually means you put the wrong funny character |
2358 | on the front of your variable. |
2359 | |
cb1a09d0 |
2360 | =item Variable syntax. |
2361 | |
2362 | (A) You've accidentally run your script through B<csh> instead |
8b1a09fc |
2363 | of Perl. Check the E<lt>#!E<gt> line, or manually feed your script |
cb1a09d0 |
2364 | into Perl yourself. |
2365 | |
7e1af8bc |
2366 | =item Warning: something's wrong |
5f05dabc |
2367 | |
2368 | (W) You passed warn() an empty string (the equivalent of C<warn "">) or |
2369 | you called it with no args and C<$_> was empty. |
2370 | |
a0d0e21e |
2371 | =item Warning: unable to close filehandle %s properly. |
2372 | |
8b1a09fc |
2373 | (S) The implicit close() done by an open() got an error indication on the |
5f05dabc |
2374 | close(). This usually indicates your file system ran out of disk space. |
a0d0e21e |
2375 | |
5f05dabc |
2376 | =item Warning: Use of "%s" without parentheses is ambiguous |
a0d0e21e |
2377 | |
2378 | (S) You wrote a unary operator followed by something that looks like a |
2379 | binary operator that could also have been interpreted as a term or |
2380 | unary operator. For instance, if you know that the rand function |
2381 | has a default argument of 1.0, and you write |
2382 | |
2383 | rand + 5; |
2384 | |
2385 | you may THINK you wrote the same thing as |
2386 | |
2387 | rand() + 5; |
2388 | |
2389 | but in actual fact, you got |
2390 | |
2391 | rand(+5); |
2392 | |
5f05dabc |
2393 | So put in parentheses to say what you really mean. |
a0d0e21e |
2394 | |
2395 | =item Write on closed filehandle |
2396 | |
2397 | (W) The filehandle you're writing to got itself closed sometime before now. |
2398 | Check your logic flow. |
2399 | |
2400 | =item X outside of string |
2401 | |
2402 | (F) You had a pack template that specified a relative position before |
2403 | the beginning of the string being unpacked. See L<perlfunc/pack>. |
2404 | |
2405 | =item x outside of string |
2406 | |
2407 | (F) You had a pack template that specified a relative position after |
2408 | the end of the string being unpacked. See L<perlfunc/pack>. |
2409 | |
2410 | =item Xsub "%s" called in sort |
2411 | |
2412 | (F) The use of an external subroutine as a sort comparison is not yet supported. |
2413 | |
2414 | =item Xsub called in sort |
2415 | |
2416 | (F) The use of an external subroutine as a sort comparison is not yet supported. |
2417 | |
2418 | =item You can't use C<-l> on a filehandle |
2419 | |
2420 | (F) A filehandle represents an opened file, and when you opened the file it |
2421 | already went past any symlink you are presumably trying to look for. |
2422 | Use a filename instead. |
2423 | |
2424 | =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! |
2425 | |
5f05dabc |
2426 | (F) And you probably never will, because you probably don't have the |
a0d0e21e |
2427 | sources to your kernel, and your vendor probably doesn't give a rip |
2428 | about what you want. Your best bet is to use the wrapsuid script in |
2429 | the eg directory to put a setuid C wrapper around your script. |
2430 | |
2431 | =item You need to quote "%s" |
2432 | |
2433 | (W) You assigned a bareword as a signal handler name. Unfortunately, you |
2434 | already have a subroutine of that name declared, which means that Perl 5 |
2435 | will try to call the subroutine when the assignment is executed, which is |
2436 | probably not what you want. (If it IS what you want, put an & in front.) |
2437 | |
2438 | =item [gs]etsockopt() on closed fd |
2439 | |
2440 | (W) You tried to get or set a socket option on a closed socket. |
2441 | Did you forget to check the return value of your socket() call? |
2442 | See L<perlfunc/getsockopt>. |
2443 | |
2444 | =item \1 better written as $1 |
2445 | |
2446 | (W) Outside of patterns, backreferences live on as variables. The use |
5f05dabc |
2447 | of backslashes is grandfathered on the right-hand side of a |
a0d0e21e |
2448 | substitution, but stylistically it's better to use the variable form |
2449 | because other Perl programmers will expect it, and it works better |
2450 | if there are more than 9 backreferences. |
2451 | |
8b1a09fc |
2452 | =item '|' and 'E<lt>' may not both be specified on command line |
748a9306 |
2453 | |
2454 | (F) An error peculiar to VMS. Perl does its own command line redirection, and |
2455 | found that STDIN was a pipe, and that you also tried to redirect STDIN using |
8b1a09fc |
2456 | 'E<lt>'. Only one STDIN stream to a customer, please. |
748a9306 |
2457 | |
8b1a09fc |
2458 | =item '|' and 'E<gt>' may not both be specified on command line |
748a9306 |
2459 | |
2460 | (F) An error peculiar to VMS. Perl does its own command line redirection, and |
2461 | thinks you tried to redirect stdout both to a file and into a pipe to another |
2462 | command. You need to choose one or the other, though nothing's stopping you |
2463 | from piping into a program or Perl script which 'splits' output into two |
2464 | streams, such as |
2465 | |
2466 | open(OUT,">$ARGV[0]") or die "Can't write to $ARGV[0]: $!"; |
2467 | while (<STDIN>) { |
2468 | print; |
2469 | print OUT; |
2470 | } |
2471 | close OUT; |
2472 | |
33c8a3fe |
2473 | =item Got an error from DosAllocMem: |
2474 | |
2475 | (P) An error peculiar to OS/2. Most probably you use an obsolete version |
5f05dabc |
2476 | of perl, and this should not happen anyway. |
33c8a3fe |
2477 | |
2478 | =item Malformed PERLLIB_PREFIX |
2479 | |
2480 | (F) An error peculiar to OS/2. PERLLIB_PREFIX should be of the form |
2481 | |
2482 | prefix1;prefix2 |
2483 | |
2484 | or |
2485 | |
2486 | prefix1 prefix2 |
2487 | |
2488 | with non-empty prefix1 and prefix2. If C<prefix1> is indeed a prefix of |
2489 | a builtin library search path, prefix2 is substituted. The error may appear |
2490 | if components are not found, or are too long. See L<perlos2/"PERLLIB_PREFIX">. |
2491 | |
2492 | =item PERL_SH_DIR too long |
2493 | |
2494 | (F) An error peculiar to OS/2. PERL_SH_DIR is the directory to find the |
2495 | C<sh>-shell in. See L<perlos2/"PERL_SH_DIR">. |
2496 | |
2497 | =item Process terminated by SIG%s |
2498 | |
2499 | (W) This is a standard message issued by OS/2 applications, while *nix |
2500 | applications die in silence. It is considered a feature of the OS/2 |
2501 | port. One can easily disable this by appropriate sighandlers, see |
2502 | L<perlipc/"Signals">. See L<perlos2/"Process terminated by SIGTERM/SIGINT">. |
2503 | |
a0d0e21e |
2504 | =back |
2505 | |