Incompatible Changes
There are no changes intentionally incompatible with Perl 5.32.0.
If any exist, they are bugs, and we request that you submit a
report. See "Reporting Bugs" below.
Modules and Pragmata
Updated Modules and Pragmata
Data::Dumper has been upgraded from version 2.174 to 2.174_01.
A number of memory leaks have been fixed.
DynaLoader has been upgraded from version 1.47 to 1.47_01.
Module::CoreList has been upgraded from version 5.20200620 to
5.20210123.
Opcode has been upgraded from version 1.47 to 1.48.
A warning has been added about evaluating untrusted code with
the perl interpreter.
Safe has been upgraded from version 2.41 to 2.41_01.
A warning has been added about evaluating untrusted code with
the perl interpreter.
Documentation
New Documentation
perlgov
Documentation of the newly formed rules of governance for Perl.
perlsecpolicy
Documentation of how the Perl security team operates and how the
team evaluates new security reports.
Changes to Existing Documentation
We have attempted to update the documentation to reflect the changes
listed in this document. If you find any we have missed, open an
issue at https://github.com/Perl/perl5/issues.
Additionally, the following selected changes have been made:
perlop
Document range op behaviour change.
Diagnostics
The following additions or changes have been made to diagnostic
output, including warnings and fatal error messages. For the complete
list of diagnostic messages, see perldiag.
Changes to Existing Diagnostics
\K not permitted in lookahead/lookbehind in regex; marked by
<-- HERE in m/%s/
This error was incorrectly produced in some cases involving
nested lookarounds. This has been fixed.
[GH #18123]
Configuration and Compilation
Newer 64-bit versions of the Intel C/C++ compiler are now
recognized and have the correct flags set.
We now trap SIGBUS when Configure checks for va_copy.
On several systems the attempt to determine if we need va_copy
or similar results in a SIGBUS instead of the expected SIGSEGV,
which previously caused a core dump.
[GH #18148]
Testing
Tests were added and changed to reflect the other additions and
changes in this release.
Platform Support
Platform-Specific Notes
MacOS (Darwin)
The hints file for darwin has been updated to handle future
macOS versions beyond 10. Perl can now be built on macOS Big
Sur.
[GH #17946, GH #18406] Minix
Build errors on Minix have been fixed.
[GH #17908]
Selected Bug Fixes
Some list assignments involving undef on the left-hand side
were over-optimized and produced incorrect results.
[GH #16685, GH #17816]
Fixed a bug in which some regexps with recursive subpatterns
matched incorrectly.
[GH #18096]
Fixed a deadlock that hung the build when Perl is compiled for
debugging memory problems and has PERL_MEM_LOG enabled.
[GH #18341]
Fixed a crash in the use of chained comparison operators when
run under "no warnings 'uninitialized'".
[GH #17917, GH #18380]
Exceptions thrown from destructors during global destruction
are no longer swallowed.
[GH #18063]
a109ccc5c5