PERL583DELTA(1)

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

💖 PERL583DELTA 💖

okay bestie, this is perl583delta, a page from the Perl Programmers Reference Guide, and it's literally just the tea on what's new in perl v5.8.3. sit down, get comfy, we're catching up 🫶

✨ NAME ✨

perl583delta — what is new for perl v5.8.3 🌸

🦋 DESCRIPTION 🦋

This doc spills the differences between the 5.8.2 release and the 5.8.3 release. periodt.

If you're upgrading from something way back like 5.6.1, no worries, but do your homework first: read the perl58delta, which covers the differences between 5.6.0 and 5.8.0, and also the perl581delta and perl582delta, which cover the differences between 5.8.0, 5.8.1 and 5.8.2.

🚫 Incompatible Changes

Literally none. There are no changes incompatible with 5.8.2. we love a peaceful era 💅

👑 Core Enhancements

A SCALAR method is now available for tied hashes! ✨ It gets called whenever a tied hash is used in scalar context, like this:

    if (%tied_hash) {
        ...
    }

Before this, %tied_hash would just return whatever that hash would have returned before it got tied (so, usually 0). The new behaviour, when there's no SCALAR method hanging around, is to return TRUE if you're in the middle of an each iteration, and otherwise call FIRSTKEY to check whether the hash is empty (making sure that a subsequent each will also begin by calling FIRSTKEY). For the full details and caveats, go look at "SCALAR" in perltie. iykyk 📖

🎀 Modules and Pragmata

  • CGI
  • Cwd
  • Digest
  • Digest::MD5
  • Encode
  • File::Spec
  • FindBin
    • A function again is provided to resolve problems where modules in different directories wish to use FindBin.
  • List::Util
    • You can now weaken references to read only values.
  • Math::BigInt
  • PodParser
  • Pod::Perldoc
  • POSIX
  • Unicode::Collate
  • Unicode::Normalize
  • Test::Harness
  • threads::shared
    • cond_wait has a new two argument form. cond_timedwait has been added.

🔥 Utility Changes

find2perl now assumes -print as a default action. Previously, you had to specify it explicitly. no more extra typing, we ate 🍓

A new utility, prove, makes it easy to run an individual regression test right at the command line. prove is part of Test::Harness, which users of earlier Perl versions can install from CPAN. iconic behaviour honestly.

🌈 New Documentation

The documentation has been revised in places to produce more standard manpages.

The documentation for the special code blocks (BEGIN, CHECK, INIT, END) has been improved. 📚

🧚 Installation and Configuration Improvements

Perl now builds on OpenVMS I64. slay 💜

🐛 Selected Bug Fixes

Using substr() on a UTF8 string could cause subsequent accesses on that string to return garbage. This was due to incorrect UTF8 offsets being cached, and is now fixed.

join() could return garbage when the same join() statement was used to process 8 bit data having earlier processed UTF8 data, due to the flags on that statement's temporary workspace not being reset correctly. This is now fixed.

"$a .. $b" will now work as expected when either $a or $b is undef.

Using Unicode keys with tied hashes should now work correctly.

Reading $^E now preserves $!. Previously, the C code implementing $^E did not preserve errno, so reading $^E could cause errno and therefore $! to change unexpectedly. 😭

Reentrant functions will (once more) work with C++. 5.8.2 introduced a bugfix which accidentally broke the compilation of Perl extensions written in C++.

💀 New or Changed Diagnostics

The fatal error DESTROY created new reference to dead object is now documented in perldiag.

🔧 Changed Internals

The hash code has been refactored to reduce source duplication. The external interface is unchanged, and aside from the bug fixes described above, there should be no change in behaviour.

hv_clear_placeholders is now part of the perl API.

Some C macros have been tidied. In particular macros which create temporary local variables now name these variables more defensively, which should avoid bugs where names clash.

<signal.h> is now always included.

⚙️ Configuration and Building

Configure now invokes callbacks regardless of the value of the variable they are called for. Previously callbacks were only invoked in the case $variable $define) branch. This change should only affect platform maintainers writing configuration hints files. ngl that's a very specific little corner of the world and we respect it 🫶

🌸 Platform Specific Problems

The regression test ext/threads/shared/t/wait.t fails on early RedHat 9 and HP-UX 10.20 due to bugs in their threading implementations. RedHat users should see https://rhn.redhat.com/errata/RHBA-2003-136.html and consider upgrading their glibc.

🙈 Known Problems

Detached threads aren't supported on Windows yet, as they may lead to memory access violation problems.

There is a known race condition opening scripts in suidperl. suidperl is neither built nor installed by default, and has been deprecated since perl 5.8.0. You are advised to replace use of suidperl with tools such as sudo ( http://www.courtesan.com/sudo/ ).

okay bestie, real talk: the suidperl thing is deprecated and has a race condition. please go use sudo. this is your sign 💅

We have a backlog of unresolved bugs. Dealing with bugs and bug reports is unglamorous work; not something ideally suited to volunteer labour, but that is all that we have.

The perl5 development team are implementing changes to help address this problem, which should go live in early 2004.

🔮 Future Directions

Code freeze for the next maintenance release (5.8.4) is on March 31st 2004, with release expected by mid April. Similarly 5.8.5's freeze will be at the end of June, with release by mid July. mark your calendars 📅

🕊️ Obituary

Iain 'Spoon' Truskett, Perl hacker, author of perlreref and contributor to CPAN, died suddenly on 29th December 2003, aged 24. He will be missed.

🐞 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://bugs.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. You can browse and search the Perl 5 bugs at http://bugs.perl.org/

🌟 SEE ALSO

  • The Changes file for 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.

okay that's the whole page, you're all caught up, go forth and be iconic 🌈✨

this little love letter was brought to you by perl v5.42.3, dated 2026-08-03, and yes it's still giving PERL583DELTA(1) energy. mwah 💖

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