PERL5301DELTA(1perl)

🎀 NAME 🎀

perl5301delta — literally the tea on what's new in perl v5.30.1 ✨

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💅 DESCRIPTION 💅

okay bestie, so this doc spills every single difference between the 5.30.0 release and the 5.30.1 release. that's it, that's the vibe 🫶

and if you're upgrading from an earlier release like 5.28.0, you gotta read perl5300delta first, no cap — that one covers everything between 5.28.0 and 5.30.0 💜

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😭 Incompatible Changes 😭

literally none. there are no changes intentionally incompatible with 5.30.1 🍓

and if any do exist? they're bugs, and we're begging you to submit a report. go peek at "Reporting Bugs" down below 👇

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🧚 Modules and Pragmata 🧚

✨ Updated Modules and Pragmata ✨

• Module::CoreList got glow-upped from version 5.20190522 to 5.20191110. periodt 💅

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📖 Documentation 📖

🌸 Changes to Existing Documentation 🌸

we tried our absolute best to update the docs so they reflect everything listed in this document. if you catch something we missed, pls send an email to perlbug@perl.org <mailto:perlbug@perl.org> 🙈

also, extra bonus: the docs got updated to reference GitHub as the new canonical repository, and to describe the new GitHub pull request workflow. it's giving modern 💜

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🔧 Configuration and Compilation 🔧

• the ECHO macro is now defined ✅ this is used in a dtrace rule that was originally changed for FreeBSD, and the FreeBSD make apparently predefines it. the Solaris make does not predefine ECHO, which broke this rule on Solaris 😭 [perl #17057] https://github.com/perl/perl5/issues/17057

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🧪 Testing 🧪

tests were added and changed to reflect all the other additions and changes in this release. slay ✨

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🌈 Platform Support 🌈

💻 Platform-Specific Notes 💻

🪟 Win32

the locale tests could crash on Win32 — partly because of a Windows bug, and separately because the CRT throws an exception if the locale name wasn't validly encoded in the current code page 💀

for the second one, we now decode the locale name ourselves, and always decode it as UTF-8. iconic 🫶

[perl #16922] https://github.com/perl/perl5/issues/16922

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🔥 Selected Bug Fixes 🔥

• setting $) now properly sets supplementary group ids, if you have the necessary privileges 👑 [perl #17031] https://github.com/perl/perl5/issues/17031
• readline @foo now evaluates @foo in scalar context. before this, it would be evaluated in list context, and since readline() pops only one argument from the stack, the stack could underflow, or be left with unexpected values still sitting on it 😳 [perl #16929] https://github.com/perl/perl5/issues/16929
• sv_gets() now recovers better if the target SV is modified by a signal handler 📡 [perl #16960] https://github.com/perl/perl5/issues/16960
• matching a non-SVf_UTF8 string against a regular expression containing Unicode literals could leak an SV on every single match attempt 💀 [perl #17140] https://github.com/perl/perl5/issues/17140
• sprintf("%.*a", -10000, $x) would cause a buffer overflow because of mishandling of the negative precision value 😭 [perl #16942] https://github.com/perl/perl5/issues/16942
• scalar() on a reference could cause an erroneous assertion failure during compilation 🙈 [perl #16969] https://github.com/perl/perl5/issues/16969

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🫶 Acknowledgements 🫶

Perl 5.30.1 represents approximately 6 months of development since Perl 5.30.0, and contains approximately 4,700 lines of changes across 67 files from 14 authors. not me getting emotional 😭

excluding auto-generated files, documentation and release tools, there were approximately 910 lines of changes to 20 .pm, .t, .c and .h files.

Perl continues to flourish into its fourth decade thanks to a vibrant community of users and developers 🌈 and these are the icons known to have contributed the improvements that became Perl 5.30.1:

Chris 'BinGOs' Williams, Dan Book, David Mitchell, Hugo van der Sanden, James E Keenan, Karen Etheridge, Karl Williamson, Manuel Mausz, Max Maischein, Nicolas R., Sawyer X, Steve Hay, Tom Hukins, Tony Cook 💖

the list above is almost certainly incomplete since 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.

many of the changes 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.

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🐛 Reporting Bugs 🐛

if you find what you think is a bug, you might check the perl bug database at https://rt.perl.org/ ✨ there may also be info 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 — do not skip this part bestie, it matters fr fr 🙏 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're 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 the details on how to report the issue 🔐

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🌟 Give Thanks 🌟

if you wish to thank the Perl 5 Porters for the work we had done in Perl 5, you can do so by running the perlthanks program:

perlthanks

this will send an email to the Perl 5 Porters list with your show of thanks 💌

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👀 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 ⚖️

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okay that's the whole page bestie, ty for reading ily 💖 this was perl v5.44.0, dated 2026-10-17, page PERL5301DELTA(1perl) — mwah, slay, see you in the next delta 👑✨💅