# PERL5242DELTA - what is new for perl v5.24.2 - man(1) - [phpMan]

[_PERL5242DELTA_(1)](https://www.chedong.com/phpMan.php/man/PERL5242DELTA/1/markdown)                  Perl Programmers Reference Guide                  [_PERL5242DELTA_(1)](https://www.chedong.com/phpMan.php/man/PERL5242DELTA/1/markdown)

## NAME
       perl5242delta - what is new for perl v5.24.2

## 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 perl5241delta, which
       describes differences between 5.24.0 and 5.24.1.

## Security
### Improved handling of '.' in @INC in base.pm
       The handling of (the removal of) '.' in @INC in 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:
       <<http://www.nntp.perl.org/group/perl.perl5.porters/2016/08/msg238991.html>>,
       <<http://www.nntp.perl.org/group/perl.perl5.porters/2016/10/msg240297.html>>.

### "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 "/\:.".  The check has been fixed to treat "." as tainted in that
       example.

## Modules and Pragmata
### Updated Modules and Pragmata
       •   base has been upgraded from version 2.23 to 2.23_01.

       •   [Module::CoreList](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ACoreList/markdown) has been upgraded from version 5.20170114_24 to 5.20170715_24.

## Selected Bug Fixes
       •   Fixed  a  crash  with  "s///l" where it thought it was dealing with UTF-8 when it wasn't.
           [GH #15543] <<https://github.com/Perl/perl5/issues/15543>>

## 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  _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  <<https://rt.perl.org/>>  .   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@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 "SECURITY VULNERABILITY CONTACT INFORMATION" in
       perlsec for details of how to report the issue.

## 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 v5.38.2                                 2026-08-18                             [_PERL5242DELTA_(1)](https://www.chedong.com/phpMan.php/man/PERL5242DELTA/1/markdown)