X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperldiag.pod;h=6e5207f5ef1f6e3ce0c355aec79018b07badc168;hb=4358a253560c226dd674c77f83b913c071c4fa25;hp=fce62b5dd7a5a0511c3af0deb82e94bbf8a0b24f;hpb=c74ace89800a81a764294e9f6eacc04bbed5a568;p=p5sagit%2Fp5-mst-13.2.git diff --git a/pod/perldiag.pod b/pod/perldiag.pod index fce62b5..6e5207f 100644 --- a/pod/perldiag.pod +++ b/pod/perldiag.pod @@ -193,7 +193,7 @@ know which context to supply to the right side. =item A thread exited while %d threads were running -(W) When using threaded Perl, a thread (not necessarily the main +(W threads)(S) When using threaded Perl, a thread (not necessarily the main thread) exited while there were still other threads running. Usually it's a good idea to first collect the return values of the created threads by joining them, and only then exit from the main @@ -282,6 +282,15 @@ invalid anytime, even before the end of the current statement. Use literals or global values as arguments to the "p" pack() template to avoid this warning. +=item Attempt to set length of freed array + +(W) You tried to set the length of an array which has been freed. You +can do this by storing a reference to the scalar representing the last index +of an array and later assigning through that reference. For example + + $r = do {my @a; \$#a}; + $$r = 503 + =item Attempt to use reference as lvalue in substr (W substr) You supplied a reference as the first argument to substr() @@ -752,6 +761,12 @@ a block, except that it isn't a proper block. This usually occurs if you tried to jump out of a sort() block or subroutine, which is a no-no. See L. +=item Can't goto subroutine from a sort sub (or similar callback) + +(F) The "goto subroutine" call can't be used to jump out of the +comparison sub for a sort(), or from a similar callback (such +as the reduce() function in List::Util). + =item Can't goto subroutine from an eval-%s (F) The "goto subroutine" call can't be used to jump out of an eval @@ -945,13 +960,6 @@ missing. You need to figure out where your CRTL misplaced its environ or define F (see L) so that environ is not searched. -=item Can't redefine active sort subroutine %s - -(F) Perl optimizes the internal handling of sort subroutines and keeps -pointers into them. You tried to redefine one such sort subroutine when -it was currently active, which is not allowed. If you really want to do -this, you should write C instead of C. - =item Can't "redo" outside a loop block (F) A "redo" statement was executed to restart the current block, but @@ -1125,7 +1133,7 @@ references are disallowed. See L. (F) The compiler tried to interpret a bracketed expression as a subscript. But to the left of the brackets was an expression that -didn't look like an array reference, or anything else subscriptable. +didn't look like a hash or array reference, or anything else subscriptable. =item Can't use \%c to mean $%c in expression @@ -1633,13 +1641,13 @@ Another possibility is that you attempted to open filedescriptor 0 =item Filehandle %s reopened as %s only for input (W io) You opened for reading a filehandle that got the same filehandle id -as STDOUT or STDERR. This occured because you closed STDOUT or STDERR +as STDOUT or STDERR. This occurred because you closed STDOUT or STDERR previously. =item Filehandle STDIN reopened as %s only for output (W io) You opened for writing a filehandle that got the same filehandle id -as STDIN. This occured because you closed STDIN previously. +as STDIN. This occurred because you closed STDIN previously. =item Final $ should be \$ or $name @@ -1857,7 +1865,7 @@ Interpretation of the octal number stopped before the 8 or 9. =item Illegal switch in PERL5OPT: %s (X) The PERL5OPT environment variable may only be used to set the -following switches: B<-[DIMUdmtw]>. +following switches: B<-[CDIMUdmtwA]>. =item Ill-formed CRTL environ value "%s" @@ -2055,6 +2063,12 @@ neither as a system call or an ioctl call (SIOCATMARK). been removed as of 5.9.0 and is no longer supported. You should use the C and C regexp modifiers instead. +=item $# is no longer supported + +(D deprecated) The special variable C<$#>, deprecated in older perls, has +been removed as of 5.9.3 and is no longer supported. You should use the +printf/sprintf functions instead. + =item `%s' is not a code reference (W overload) The second (fourth, sixth, ...) argument of overload::constant @@ -2095,7 +2109,7 @@ effective uids or gids failed. =item length/code after end of string in unpack -(F) While unpacking, the string buffer was alread used up when an unpack +(F) While unpacking, the string buffer was already used up when an unpack length/code combination tried to obtain more data. This results in an undefined value for the length. See L. @@ -2613,6 +2627,12 @@ to UTC. If it's not, define the logical name F to translate to the number of seconds which need to be added to UTC to get local time. +=item Non-string passed as bitmask + +(W misc) A number has been passed as a bitmask argument to select(). +Use the vec() function to construct the file descriptor bitmasks for +select. See L + =item Null filename used (F) You can't require the null filename, especially because on many @@ -2704,7 +2724,7 @@ that isn't open. Check your control flow. See also L. (S internal) An internal warning that the grammar is screwed up. -=item Operation `%s': no method found, %s +=item Operation "%s": no method found, %s (F) An attempt was made to perform an overloaded operation for which no handler was defined. While some handlers can be autogenerated in terms @@ -2810,6 +2830,13 @@ page. See L. (P) An internal error. +=item panic: attempt to call %s in %s + +(P) One of the file test operators entered a code branch that calls +an ACL related-function, but that function is not available on this +platform. Earlier checks mean that it should not be possible to +enter this branch on this platform. + =item panic: ck_grep (P) Failed an internal consistency check trying to compile a grep. @@ -2895,10 +2922,6 @@ references to an object. (P) Something requested a negative number of bytes of malloc. -=item panic: mapstart - -(P) The compiler is screwed up with respect to the map() function. - =item panic: memory wrap (P) Something tried to allocate more memory than possible. @@ -2979,6 +3002,11 @@ was string. (P) The compiler attempted to do a goto, or something weird like that. +=item panic: unimplemented op %s (#%d) called + +(P) The compiler is screwed up and attempted to use an op that isn't permitted +at run time. + =item panic: utf16_to_utf8: odd bytelen (P) Something tried to call utf16_to_utf8 with an odd (as opposed @@ -3364,7 +3392,7 @@ earlier. =item Repeated format line will never terminate (~~ and @# incompatible) -(F) Your format containes the ~~ repeat-until-blank sequence and a +(F) Your format contains the ~~ repeat-until-blank sequence and a numeric field that will never go blank so that the repetition never terminates. You might use ^# instead. See L. @@ -3434,6 +3462,16 @@ construct, not just the empty search pattern. Therefore code written in Perl 5.9.0 or later that uses the // as the I can be misparsed by pre-5.9.0 Perls as a non-terminated search pattern. +=item Search pattern not terminated or ternary operator parsed as search pattern + +(F) The lexer couldn't find the final delimiter of a C +construct. + +The question mark is also used as part of the ternary operator (as in +C) leading to some ambiguous constructions being wrongly +parsed. One way to disambiguate the parsing is to put parentheses around +the conditional expression, i.e. C<(foo) ? 0 : 1>. + =item %sseek() on unopened filehandle (W unopened) You tried to use the seek() or sysseek() function on a @@ -3648,7 +3686,7 @@ a block by itself. (W unopened) You tried to use the stat() function on a filehandle that was either never opened or has since been closed. -=item Stub found while resolving method `%s' overloading %s +=item Stub found while resolving method "%s" overloading "%s" (P) Overloading resolution over @ISA tree may be broken by importation stubs. Stubs should never be implicitly created, but explicit calls to @@ -3695,6 +3733,11 @@ assignment or as a subroutine argument for example). (F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but a version of the setuid emulator somehow got run anyway. +=item sv_upgrade from type %d down to type %d + +(P) Perl tried to force the upgrade an SV to a type which was actually +inferior to its current type. + =item Switch (?(condition)... contains too many branches in regex; marked by <-- HERE in m/%s/ (F) A (?(condition)if-clause|else-clause) construct can have at most two @@ -3845,7 +3888,7 @@ target of the change to =item thread failed to start: %s -(F) The entry point function of threads->create() failed for some reason. +(W threads)(S) The entry point function of threads->create() failed for some reason. =item times not implemented @@ -4301,7 +4344,7 @@ L for more on this. This warning will not be issued for numerical constants equal to 0 or 1 since they are often used in statements like - 1 while sub_with_side_effects() ; + 1 while sub_with_side_effects(); String constants that would normally evaluate to 0 or 1 are warned about. @@ -4417,11 +4460,6 @@ C. (F) You attempted to use a feature of printf that is accessible from only C. This usually means there's a better way to do it in Perl. -=item Use of $# is deprecated - -(D deprecated) This was an ill-advised attempt to emulate a poorly -defined B feature. Use an explicit printf() or sprintf() instead. - =item Use of %s is deprecated (D deprecated) The construct indicated is no longer recommended for use, @@ -4686,16 +4724,6 @@ the beginning of the string being (un)packed. See L. (F) You had a pack template that specified a relative position after the end of the string being unpacked. See L. -=item Xsub "%s" called in sort - -(F) The use of an external subroutine as a sort comparison is not yet -supported. - -=item Xsub called in sort - -(F) The use of an external subroutine as a sort comparison is not yet -supported. - =item YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET! (F) And you probably never will, because you probably don't have the