[perl5.git] / pod / perl5182delta.pod

=encoding utf8

=head1 NAME

perl5182delta - what is new for perl v5.18.2

=head1 DESCRIPTION

This document describes differences between the 5.18.1 release and the 5.18.2
release.

If you are upgrading from an earlier release such as 5.18.0, first read
L<perl5181delta>, which describes differences between 5.18.0 and 5.18.1.

=head1 Modules and Pragmata

=head2 Updated Modules and Pragmata

=over 4

=item *

L<B> has been upgraded from version 1.42_01 to 1.42_02.

The fix for [perl #118525] introduced a regression in the behaviour of
C<B::CV::GV>, changing the return value from a C<B::SPECIAL> object on
a C<NULL> C<CvGV> to C<undef>.  C<B::CV::GV> again returns a
C<B::SPECIAL> object in this case.  [perl #119413]

=item *

L<B::Concise> has been upgraded from version 0.95 to 0.95_01.

This fixes a bug in dumping unexpected SPECIALs.

=item *

L<English> has been upgraded from version 1.06 to 1.06_01.  This fixes an
error about the performance of C<$`>, C<$&>, and C<$'>.

=item *

L<File::Glob> has been upgraded from version 1.20 to 1.20_01.

=back

=head1 Documentation

=head2 Changes to Existing Documentation

=over 4

=item *

L<perlrepository> has been restored with a pointer to more useful pages.

=item *

L<perlhack> has been updated with the latest changes from blead.

=back

=head1 Selected Bug Fixes

=over 4

=item *

Perl 5.18.1 introduced a regression along with a bugfix for lexical subs.
Some B::SPECIAL results from B::CV::GV became undefs instead.  This broke
Devel::Cover among other libraries.  This has been fixed.  [perl #119351]

=item *

Perl 5.18.0 introduced a regression whereby C<[:^ascii:]>, if used in the same
character class as other qualifiers, would fail to match characters in the
Latin-1 block.  This has been fixed.  [perl #120799]

=item *

Perl 5.18.0 introduced a regression when using ->SUPER::method with AUTOLOAD
by looking up AUTOLOAD from the current package, rather than the current
package’s superclass.  This has been fixed. [perl #120694]

=item *

Perl 5.18.0 introduced a regression whereby C<-bareword> was no longer
permitted under the C<strict> and C<integer> pragmata when used together.  This
has been fixed.  [perl #120288]

=item *

Previously PerlIOBase_dup didn't check if pushing the new layer succeeded
before (optionally) setting the utf8 flag. This could cause
segfaults-by-nullpointer.  This has been fixed.

=item *

A buffer overflow with very long identifiers has been fixed.

=item *

A regression from 5.16 in the handling of padranges led to assertion failures
if a keyword plugin declined to handle the second ‘my’, but only after creating
a padop.

This affected, at least, Devel::CallParser under threaded builds.

This has been fixed.

=item *

The construct C<< $r=qr/.../; /$r/p >> is now handled properly, an issue which
had been worsened by changes 5.18.0. [perl #118213]

=back

=head1 Acknowledgements

Perl 5.18.2 represents approximately 3 months of development since Perl
5.18.1 and contains approximately 980 lines of changes across 39 files from 4
authors.

Perl continues to flourish into its third decade thanks to a vibrant
community of users and developers. The following people are known to have
contributed the improvements that became Perl 5.18.2:

Craig A. Berry, David Mitchell, Ricardo Signes, Tony Cook.

The list above is almost certainly incomplete as it is automatically
generated from version control history. In particular, it does not include
the names of the (very much appreciated) contributors who reported issues to
the Perl bug tracker.

Many of the changes included in this version originated in the CPAN modules
included in Perl's core. We're grateful to the entire CPAN community for
helping Perl to flourish.

For a more complete list of all of Perl's historical contributors, please see
the F<AUTHORS> file in the Perl source distribution.

=head1 Reporting Bugs

If you find what you think is a bug, you might check the articles recently
posted to the comp.lang.perl.misc newsgroup and the perl bug database at
http://rt.perl.org/perlbug/ .  There may also be information at
http://www.perl.org/ , the Perl Home Page.

If you believe you have an unreported bug, please run the L<perlbug> program
included with your release.  Be sure to trim your bug down to a tiny but
sufficient test case.  Your bug report, along with the output of C<perl -V>,
will be sent off to perlbug@perl.org to be analysed by the Perl porting team.

If the bug you are reporting has security implications, which make it
inappropriate to send to a publicly archived mailing list, then please send it
to perl5-security-report@perl.org.  This points to a closed subscription
unarchived mailing list, which includes all the core committers, who will be
able to help assess the impact of issues, figure out a resolution, and help
co-ordinate the release of patches to mitigate or fix the problem across all
platforms on which Perl is supported.  Please only use this address for
security issues in the Perl core, not for modules independently distributed on
CPAN.

=head1 SEE ALSO

The F<Changes> file for an explanation of how to view exhaustive details on
what changed.

The F<INSTALL> file for how to build Perl.

The F<README> file for general stuff.

The F<Artistic> and F<Copying> files for copyright information.

=cut
Commit	Line	Data
7b97958f SH	1	=encoding utf8
	2
	3	=head1 NAME
	4
	5	perl5182delta - what is new for perl v5.18.2
	6
	7	=head1 DESCRIPTION
	8
	9	This document describes differences between the 5.18.1 release and the 5.18.2
	10	release.
	11
	12	If you are upgrading from an earlier release such as 5.18.0, first read
	13	L<perl5181delta>, which describes differences between 5.18.0 and 5.18.1.
	14
	15	=head1 Modules and Pragmata
	16
	17	=head2 Updated Modules and Pragmata
	18
	19	=over 4
	20
	21	=item *
	22
	23	L<B> has been upgraded from version 1.42_01 to 1.42_02.
	24
	25	The fix for [perl #118525] introduced a regression in the behaviour of
	26	C<B::CV::GV>, changing the return value from a C<B::SPECIAL> object on
	27	a C<NULL> C<CvGV> to C<undef>. C<B::CV::GV> again returns a
	28	C<B::SPECIAL> object in this case. [perl #119413]
	29
	30	=item *
	31
	32	L<B::Concise> has been upgraded from version 0.95 to 0.95_01.
	33
	34	This fixes a bug in dumping unexpected SPECIALs.
	35
	36	=item *
	37
	38	L<English> has been upgraded from version 1.06 to 1.06_01. This fixes an
2e061f0f	39	error about the performance of C<$`>, C<$&>, and C<$'>.
7b97958f SH	40
	41	=item *
	42
	43	L<File::Glob> has been upgraded from version 1.20 to 1.20_01.
	44
	45	=back
	46
	47	=head1 Documentation
	48
	49	=head2 Changes to Existing Documentation
	50
	51	=over 4
	52
	53	=item *
	54
	55	L<perlrepository> has been restored with a pointer to more useful pages.
	56
	57	=item *
	58
	59	L<perlhack> has been updated with the latest changes from blead.
	60
	61	=back
	62
	63	=head1 Selected Bug Fixes
	64
	65	=over 4
	66
	67	=item *
	68
	69	Perl 5.18.1 introduced a regression along with a bugfix for lexical subs.
	70	Some B::SPECIAL results from B::CV::GV became undefs instead. This broke
	71	Devel::Cover among other libraries. This has been fixed. [perl #119351]
	72
	73	=item *
	74
	75	Perl 5.18.0 introduced a regression whereby C<[:^ascii:]>, if used in the same
	76	character class as other qualifiers, would fail to match characters in the
	77	Latin-1 block. This has been fixed. [perl #120799]
	78
	79	=item *
	80
	81	Perl 5.18.0 introduced a regression when using ->SUPER::method with AUTOLOAD
	82	by looking up AUTOLOAD from the current package, rather than the current
	83	package’s superclass. This has been fixed. [perl #120694]
	84
	85	=item *
	86
	87	Perl 5.18.0 introduced a regression whereby C<-bareword> was no longer
	88	permitted under the C<strict> and C<integer> pragmata when used together. This
	89	has been fixed. [perl #120288]
	90
	91	=item *
	92
	93	Previously PerlIOBase_dup didn't check if pushing the new layer succeeded
	94	before (optionally) setting the utf8 flag. This could cause
	95	segfaults-by-nullpointer. This has been fixed.
	96
	97	=item *
	98
	99	A buffer overflow with very long identifiers has been fixed.
	100
	101	=item *
	102
	103	A regression from 5.16 in the handling of padranges led to assertion failures
104	if a keyword plugin declined to handle the second ‘my’, but only after creating
105	a padop.
106
107	This affected, at least, Devel::CallParser under threaded builds.
108
2e061f0f	109	This has been fixed.
7b97958f SH	110
	111	=item *
	112
	113	The construct C<< $r=qr/.../; /$r/p >> is now handled properly, an issue which
	114	had been worsened by changes 5.18.0. [perl #118213]
	115
	116	=back
	117
	118	=head1 Acknowledgements
	119
	120	Perl 5.18.2 represents approximately 3 months of development since Perl
	121	5.18.1 and contains approximately 980 lines of changes across 39 files from 4
	122	authors.
	123
	124	Perl continues to flourish into its third decade thanks to a vibrant
	125	community of users and developers. The following people are known to have
	126	contributed the improvements that became Perl 5.18.2:
	127
	128	Craig A. Berry, David Mitchell, Ricardo Signes, Tony Cook.
	129
	130	The list above is almost certainly incomplete as it is automatically
	131	generated from version control history. In particular, it does not include
	132	the names of the (very much appreciated) contributors who reported issues to
	133	the Perl bug tracker.
	134
	135	Many of the changes included in this version originated in the CPAN modules
	136	included in Perl's core. We're grateful to the entire CPAN community for
	137	helping Perl to flourish.
	138
	139	For a more complete list of all of Perl's historical contributors, please see
	140	the F<AUTHORS> file in the Perl source distribution.
	141
	142	=head1 Reporting Bugs
	143
	144	If you find what you think is a bug, you might check the articles recently
	145	posted to the comp.lang.perl.misc newsgroup and the perl bug database at
	146	http://rt.perl.org/perlbug/ . There may also be information at
	147	http://www.perl.org/ , the Perl Home Page.
	148
	149	If you believe you have an unreported bug, please run the L<perlbug> program
	150	included with your release. Be sure to trim your bug down to a tiny but
	151	sufficient test case. Your bug report, along with the output of C<perl -V>,
	152	will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
	153
	154	If the bug you are reporting has security implications, which make it
	155	inappropriate to send to a publicly archived mailing list, then please send it
	156	to perl5-security-report@perl.org. This points to a closed subscription
	157	unarchived mailing list, which includes all the core committers, who will be
	158	able to help assess the impact of issues, figure out a resolution, and help
	159	co-ordinate the release of patches to mitigate or fix the problem across all
	160	platforms on which Perl is supported. Please only use this address for
	161	security issues in the Perl core, not for modules independently distributed on
	162	CPAN.
	163
	164	=head1 SEE ALSO
	165
	166	The F<Changes> file for an explanation of how to view exhaustive details on
	167	what changed.
	168
	169	The F<INSTALL> file for how to build Perl.
	170
	171	The F<README> file for general stuff.
	172
	173	The F<Artistic> and F<Copying> files for copyright information.
174
175	=cut