[perl5.git] / pod / perl5242delta.pod

=encoding utf8

=head1 NAME

perl5242delta - what is new for perl v5.24.2

=head1 DESCRIPTION

This document describes differences between the 5.24.1 release and the 5.24.2
release.

If you are upgrading from an earlier release such as 5.24.0, first read
L<perl5241delta>, which describes differences between 5.24.0 and 5.24.1.

=head1 Security

=head2 Improved handling of '.' in @INC in base.pm

The handling of (the removal of) C<'.'> in C<@INC> in L<base> has been
improved.  This resolves some problematic behaviour in the approach taken in
Perl 5.24.1, which is probably best described in the following two threads on
the Perl 5 Porters mailing list:
L<http://www.nntp.perl.org/group/perl.perl5.porters/2016/08/msg238991.html>,
L<http://www.nntp.perl.org/group/perl.perl5.porters/2016/10/msg240297.html>.

=head2 "Escaped" colons and relative paths in PATH

On Unix systems, Perl treats any relative paths in the PATH environment
variable as tainted when starting a new process.  Previously, it was allowing a
backslash to escape a colon (unlike the OS), consequently allowing relative
paths to be considered safe if the PATH was set to something like C</\:.>.  The
check has been fixed to treat C<.> as tainted in that example.

=head1 Modules and Pragmata

=head2 Updated Modules and Pragmata

=over 4

=item *

L<base> has been upgraded from version 2.23 to 2.23_01.

=item *

L<Module::CoreList> has been upgraded from version 5.20170114_24 to 5.20170715_24.

=back

=head1 Selected Bug Fixes

=over 4

=item *

Fixed a crash with C<s///l> where it thought it was dealing with UTF-8 when it
wasn't.
L<[perl #129038]|https://rt.perl.org/Ticket/Display.html?id=129038>

=back

=head1 Acknowledgements

Perl 5.24.2 represents approximately 6 months of development since Perl 5.24.1
and contains approximately 2,500 lines of changes across 53 files from 18
authors.

Excluding auto-generated files, documentation and release tools, there were
approximately 960 lines of changes to 17 .pm, .t, .c and .h files.

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 5.24.2:

Aaron Crane, Abigail, Aristotle Pagaltzis, Chris 'BinGOs' Williams, Dan
Collins, David Mitchell, Eric Herman, Father Chrysostomos, James E Keenan, Karl
Williamson, Lukas Mai, Renee Baecker, Ricardo Signes, Sawyer X, Stevan Little,
Steve Hay, Tony Cook, Yves Orton.

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
L<https://rt.perl.org/> .  There may also be information at
L<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 see
L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
for details of how to report the issue.

=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
50d330d7 SH	1	=encoding utf8
	2
	3	=head1 NAME
	4
	5	perl5242delta - what is new for perl v5.24.2
	6
	7	=head1 DESCRIPTION
	8
	9	This document describes differences between the 5.24.1 release and the 5.24.2
	10	release.
	11
	12	If you are upgrading from an earlier release such as 5.24.0, first read
	13	L<perl5241delta>, which describes differences between 5.24.0 and 5.24.1.
	14
	15	=head1 Security
	16
	17	=head2 Improved handling of '.' in @INC in base.pm
	18
	19	The handling of (the removal of) C<'.'> in C<@INC> in L<base> has been
	20	improved. This resolves some problematic behaviour in the approach taken in
	21	Perl 5.24.1, which is probably best described in the following two threads on
	22	the Perl 5 Porters mailing list:
	23	L<http://www.nntp.perl.org/group/perl.perl5.porters/2016/08/msg238991.html>,
	24	L<http://www.nntp.perl.org/group/perl.perl5.porters/2016/10/msg240297.html>.
	25
	26	=head2 "Escaped" colons and relative paths in PATH
	27
	28	On Unix systems, Perl treats any relative paths in the PATH environment
	29	variable as tainted when starting a new process. Previously, it was allowing a
	30	backslash to escape a colon (unlike the OS), consequently allowing relative
	31	paths to be considered safe if the PATH was set to something like C</\:.>. The
	32	check has been fixed to treat C<.> as tainted in that example.
	33
	34	=head1 Modules and Pragmata
	35
	36	=head2 Updated Modules and Pragmata
	37
	38	=over 4
	39
	40	=item *
	41
	42	L<base> has been upgraded from version 2.23 to 2.23_01.
	43
	44	=item *
	45
	46	L<Module::CoreList> has been upgraded from version 5.20170114_24 to 5.20170715_24.
	47
	48	=back
	49
	50	=head1 Selected Bug Fixes
	51
	52	=over 4
	53
	54	=item *
	55
	56	Fixed a crash with C<s///l> where it thought it was dealing with UTF-8 when it
	57	wasn't.
	58	L<[perl #129038]\|https://rt.perl.org/Ticket/Display.html?id=129038>
	59
	60	=back
	61
	62	=head1 Acknowledgements
	63
	64	Perl 5.24.2 represents approximately 6 months of development since Perl 5.24.1
65	and contains approximately 2,500 lines of changes across 53 files from 18
66	authors.
67
68	Excluding auto-generated files, documentation and release tools, there were
69	approximately 960 lines of changes to 17 .pm, .t, .c and .h files.
70
71	Perl continues to flourish into its third decade thanks to a vibrant community
72	of users and developers. The following people are known to have contributed
73	the improvements that became Perl 5.24.2:
74
75	Aaron Crane, Abigail, Aristotle Pagaltzis, Chris 'BinGOs' Williams, Dan
76	Collins, David Mitchell, Eric Herman, Father Chrysostomos, James E Keenan, Karl
77	Williamson, Lukas Mai, Renee Baecker, Ricardo Signes, Sawyer X, Stevan Little,
78	Steve Hay, Tony Cook, Yves Orton.
79
80	The list above is almost certainly incomplete as it is automatically generated
81	from version control history. In particular, it does not include the names of
82	the (very much appreciated) contributors who reported issues to the Perl bug
83	tracker.
84
85	Many of the changes included in this version originated in the CPAN modules
86	included in Perl's core. We're grateful to the entire CPAN community for
87	helping Perl to flourish.
88
89	For a more complete list of all of Perl's historical contributors, please see
90	the F<AUTHORS> file in the Perl source distribution.
91
92	=head1 Reporting Bugs
93
94	If you find what you think is a bug, you might check the articles recently
95	posted to the comp.lang.perl.misc newsgroup and the perl bug database at
96	L<https://rt.perl.org/> . There may also be information at
97	L<http://www.perl.org/> , the Perl Home Page.
98
99	If you believe you have an unreported bug, please run the L<perlbug> program
100	included with your release. Be sure to trim your bug down to a tiny but
101	sufficient test case. Your bug report, along with the output of C<perl -V>,
102	will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
103
104	If the bug you are reporting has security implications which make it
105	inappropriate to send to a publicly archived mailing list, then see
106	L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
107	for details of how to report the issue.
108
109	=head1 SEE ALSO
110
111	The F<Changes> file for an explanation of how to view exhaustive details on
112	what changed.
113
114	The F<INSTALL> file for how to build Perl.
115
116	The F<README> file for general stuff.
117
118	The F<Artistic> and F<Copying> files for copyright information.
119
120	=cut