phpman > man > perl5163delta(1)

PERL5163DELTA(1)                  Perl Programmers Reference Guide                  PERL5163DELTA(1)



NAME
       perl5163delta - what is new for perl v5.16.3

DESCRIPTION
       This document describes differences between the 5.16.2 release and the 5.16.3 release.

       If you are upgrading from an earlier release such as 5.16.1, first read perl5162delta, which
       describes differences between 5.16.1 and 5.16.2.

Core Enhancements
       No changes since 5.16.0.

Security
       This release contains one major and a number of minor security fixes.  These latter are
       included mainly to allow the test suite to pass cleanly with the clang compiler's address
       sanitizer facility.

   CVE-2013-1667: memory exhaustion with arbitrary hash keys
       With a carefully crafted set of hash keys (for example arguments on a URL), it is possible to
       cause a hash to consume a large amount of memory and CPU, and thus possibly to achieve a
       Denial-of-Service.

       This problem has been fixed.

   wrap-around with IO on long strings
       Reading or writing strings greater than 2**31 bytes in size could segfault due to integer
       wraparound.

       This problem has been fixed.

   memory leak in Encode
       The UTF-8 encoding implementation in Encode.xs had a memory leak which has been fixed.

Incompatible Changes
       There are no changes intentionally incompatible with 5.16.0. If any exist, they are bugs and
       reports are welcome.

Deprecations
       There have been no deprecations since 5.16.0.

Modules and Pragmata
   Updated Modules and Pragmata
       •   Encode has been upgraded from version 2.44 to version 2.44_01.

       •   Module::CoreList has been upgraded from version 2.76 to version 2.76_02.

       •   XS::APItest has been upgraded from version 0.38 to version 0.39.

Known Problems
       None.

Acknowledgements
       Perl 5.16.3 represents approximately 4 months of development since Perl 5.16.2 and contains
       approximately 870 lines of changes across 39 files from 7 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 5.16.3:

       Andy Dougherty, Chris 'BinGOs' Williams, Dave Rolsky, David Mitchell, Michael Schroeder,
       Ricardo Signes, 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.

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

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 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 "perl -V", will be sent off to perlbug AT 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 AT 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.

SEE ALSO
       The Changes file for an explanation of how to view exhaustive details on what changed.

       The INSTALL file for how to build Perl.

       The README file for general stuff.

       The Artistic and Copying files for copyright information.



perl v5.34.0                                 2025-07-25                             PERL5163DELTA(1)