5 perl5281delta - what is new for perl v5.28.1
9 This document describes differences between the 5.28.0 release and the 5.28.1
12 If you are upgrading from an earlier release such as 5.26.0, first read
13 L<perl5280delta>, which describes differences between 5.26.0 and 5.28.0.
17 =head2 [CVE-2018-18311] Integer overflow leading to buffer overflow and segmentation fault
19 Integer arithmetic in C<Perl_my_setenv()> could wrap when the combined length
20 of the environment variable name and value exceeded around 0x7fffffff. This
21 could lead to writing beyond the end of an allocated buffer with attacker
24 L<[GH #16560]|https://github.com/Perl/perl5/issues/16560>
26 =head2 [CVE-2018-18312] Heap-buffer-overflow write in S_regatom (regcomp.c)
28 A crafted regular expression could cause heap-buffer-overflow write during
29 compilation, potentially allowing arbitrary code execution.
31 L<[GH #16649]|https://github.com/Perl/perl5/issues/16649>
33 =head1 Incompatible Changes
35 There are no changes intentionally incompatible with 5.28.0. If any exist,
36 they are bugs, and we request that you submit a report. See
37 L</Reporting Bugs> below.
39 =head1 Modules and Pragmata
41 =head2 Updated Modules and Pragmata
47 L<Module::CoreList> has been upgraded from version 5.20180622 to 5.20181129_28.
51 =head1 Selected Bug Fixes
57 Perl 5.28 introduced an C<index()> optimization when comparing to -1 (or
58 indirectly, e.g. >= 0). When this optimization was triggered inside a C<when>
59 clause it caused a warning ("Argument %s isn't numeric in smart match"). This
61 L<[GH #16626]|https://github.com/Perl/perl5/issues/16626>
65 Matching of decimal digits in script runs, introduced in Perl 5.28, had a bug
66 that led to C<"1\N{THAI DIGIT FIVE}"> matching C</^(*sr:\d+)$/> when it should
67 not. This has now been fixed.
71 The new in-place editing code no longer leaks directory handles.
72 L<[GH #16602]|https://github.com/Perl/perl5/issues/16602>
76 =head1 Acknowledgements
78 Perl 5.28.1 represents approximately 5 months of development since Perl 5.28.0
79 and contains approximately 6,100 lines of changes across 44 files from 12
82 Excluding auto-generated files, documentation and release tools, there were
83 approximately 700 lines of changes to 12 .pm, .t, .c and .h files.
85 Perl continues to flourish into its fourth decade thanks to a vibrant community
86 of users and developers. The following people are known to have contributed
87 the improvements that became Perl 5.28.1:
89 Aaron Crane, Abigail, Chris 'BinGOs' Williams, Dagfinn Ilmari Mannsåker, David
90 Mitchell, James E Keenan, John SJ Anderson, Karen Etheridge, Karl Williamson,
91 Sawyer X, Steve Hay, Tony Cook.
93 The list above is almost certainly incomplete as it is automatically generated
94 from version control history. In particular, it does not include the names of
95 the (very much appreciated) contributors who reported issues to the Perl bug
98 Many of the changes included in this version originated in the CPAN modules
99 included in Perl's core. We're grateful to the entire CPAN community for
100 helping Perl to flourish.
102 For a more complete list of all of Perl's historical contributors, please see
103 the F<AUTHORS> file in the Perl source distribution.
105 =head1 Reporting Bugs
107 If you find what you think is a bug, you might check the perl bug database
108 at L<https://rt.perl.org/> . There may also be information at
109 L<http://www.perl.org/> , the Perl Home Page.
111 If you believe you have an unreported bug, please run the L<perlbug> program
112 included with your release. Be sure to trim your bug down to a tiny but
113 sufficient test case. Your bug report, along with the output of C<perl -V>,
114 will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
116 If the bug you are reporting has security implications which make it
117 inappropriate to send to a publicly archived mailing list, then see
118 L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
119 for details of how to report the issue.
123 If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
124 you can do so by running the C<perlthanks> program:
128 This will send an email to the Perl 5 Porters list with your show of thanks.
132 The F<Changes> file for an explanation of how to view exhaustive details on
135 The F<INSTALL> file for how to build Perl.
137 The F<README> file for general stuff.
139 The F<Artistic> and F<Copying> files for copyright information.