PERL5242DELTA(1)

📦
version 5.42.3 · 22 versions
, in fedora 43, fedora 44

💖 PERL5242DELTA 💖

okay bestie, you found the PERL5242DELTA page — it lives in the Perl Programmers Reference Guide section of the manual, and it's literally the tea on what's new for perl v5.24.2 🫶

✨ NAME ✨

perl5242delta — the whole rundown on what's new for perl v5.24.2 🎀

🌸 DESCRIPTION 🌸

So this doc spills the differences between the 5.24.1 release and the 5.24.2 release. that's the vibe.

and listen — if you're upgrading from something even older, like 5.24.0, you gotta read perl5241delta first, because that one covers the 5.24.0 → 5.24.1 glow-up. don't skip it, i'm serious 🙈

🔥 Security 🔥

👑 Improved handling of '.' in @INC in base.pm

The way base handles (the removal of) . in @INC got a glow-up. this fixes some problematic behaviour in the approach that Perl 5.24.1 took, and honestly the best way to understand it is to read the 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 it starts a new process. but here's the mess: previously it was letting a backslash escape a colon (unlike the OS does, bestie, the OS does not do that), which meant relative paths could be considered safe if PATH was set to something like "/\:.". yeah. yikes. the check has been fixed so it treats . as tainted in that example. periodt 🧚

🦋 Modules and Pragmata 🦋

⭐ Updated Modules and Pragmata

  • base — upgraded from version 2.23 to 2.23_01. 💖
  • Module::CoreList — upgraded from version 5.20170114_24 to 5.20170715_24. 💖

🌈 Selected Bug Fixes 🌈

💜 Acknowledgements 💜

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

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.

fr fr the list above is almost certainly incomplete, because it's 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. so if you reported something and you're not up there — you're still iconic, we see you 🫶

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. do not just yell it into the group chat, okay?? 🔐

🌟 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.

and that's the whole page, bestie!! this was perl v5.42.3, dated 2026-08-03, and you read the PERL5242DELTA(1) manual page from the Perl Programmers Reference Guide. slay, go forth and upgrade responsibly 💅✨🌸

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