diff options
Diffstat (limited to 'pod/perldiag.pod')
| -rw-r--r-- | pod/perldiag.pod | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/pod/perldiag.pod b/pod/perldiag.pod index a4d9356977..166e046f22 100644 --- a/pod/perldiag.pod +++ b/pod/perldiag.pod @@ -35,7 +35,7 @@ if you want to localize a package variable. =item "my" variable %s masks earlier declaration in same scope -(S) A lexical variable has been redeclared in the same scope, effectively +(W) A lexical variable has been redeclared in the same scope, effectively eliminating all access to the previous instance. This is almost always a typographical error. Note that the earlier variable will still exist until the end of the scope or until all closure referents to it are @@ -594,7 +594,11 @@ for us to go to. See L<perlfunc/goto>. the closing delimiter was omitted. Because bracketed quotes count nesting levels, the following is missing its final parenthesis: - print q(The character '(' starts a side comment.) + print q(The character '(' starts a side comment.); + +If you're getting this error from a here-document, you may have +included unseen whitespace before or after your closing tag. A good +programmer's editor will have a way to help you find these characters. =item Can't fork @@ -778,13 +782,16 @@ of suidperl. =item Can't take log of %g -(F) Logarithms are defined on only positive real numbers. +(F) For ordinary real numbers, you can't take the logarithm of a +negative number or zero. There's a Math::Complex package that comes +standard with Perl, though, if you really want to do that for +the negative numbers. =item Can't take sqrt of %g (F) For ordinary real numbers, you can't take the square root of a -negative number. There's a Complex package available for Perl, though, -if you really want to do that. +negative number. There's a Math::Complex package that comes standard +with Perl, though, if you really want to do that. =item Can't undef active subroutine @@ -1315,10 +1322,14 @@ See L<perlfunc/sprintf>. =item Invalid type in pack: '%s' (F) The given character is not a valid pack type. See L<perlfunc/pack>. +(W) The given character is not a valid pack type but used to be silently +ignored. =item Invalid type in unpack: '%s' (F) The given character is not a valid unpack type. See L<perlfunc/unpack>. +(W) The given character is not a valid unpack type but used to be silently +ignored. =item ioctl is not implemented @@ -2015,6 +2026,11 @@ an unintended loop in your inheritance hierarchy. (W) The internal sv_replace() function was handed a new SV with a reference count of other than 1. +=item regexp *+ operand could be empty + +(F) The part of the regexp subject to either the * or + quantifier +could match an empty string. + =item regexp memory corruption (P) The regular expression engine got confused by what the regular @@ -2082,6 +2098,7 @@ or setgid bit set. This doesn't make much sense. (F) The lexer couldn't find the final delimiter of a // or m{} construct. Remember that bracketing delimiters count nesting level. +Missing the leading C<$> from a variable C<$m> may cause this error. =item %sseek() on unopened file @@ -2252,11 +2269,13 @@ L<perlop/"Quote and Quote-like Operators">. (F) The lexer couldn't find the interior delimiter of a s/// or s{}{} construct. Remember that bracketing delimiters count nesting level. +Missing the leading C<$> from variable C<$s> may cause this error. =item Substitution replacement not terminated (F) The lexer couldn't find the final delimiter of a s/// or s{}{} construct. Remember that bracketing delimiters count nesting level. +Missing the leading C<$> from variable C<$s> may cause this error. =item substr outside of string @@ -2413,7 +2432,8 @@ it. See L<perlre>. =item Translation pattern not terminated (F) The lexer couldn't find the interior delimiter of a tr/// or tr[][] -construct. +or y/// or y[][] construct. Missing the leading C<$> from variables +C<$tr> or C<$y> may cause this error. =item Translation replacement not terminated @@ -2635,6 +2655,10 @@ non-methods. The simple fix for old code is: In any module that used to depend on inheriting C<AUTOLOAD> for non-methods from a base class named C<BaseClass>, execute C<*AUTOLOAD = \&BaseClass::AUTOLOAD> during startup. +In code that currently says C<use AutoLoader; @ISA = qw(AutoLoader);> you +should remove AutoLoader from @ISA and change C<use AutoLoader;> to +C<C<use AutoLoader 'AUTOLOAD';>. + =item Use of %s is deprecated (D) The construct indicated is no longer recommended for use, generally |