This document describes differences between the 5.18.1 release and the
If you are upgrading from an earlier release such as 5.18.0, first read
perl5181delta, which describes differences between 5.18.0 and 5.18.1.
Modules and Pragmata
Updated Modules and Pragmata
o B has been upgraded from version 1.42_01 to 1.42_02.
The fix for [perl #118525] introduced a regression in the behaviour
of "B::CV::GV", changing the return value from a "B::SPECIAL"
object on a "NULL" "CvGV" to "undef". "B::CV::GV" again returns a
"B::SPECIAL" object in this case. [perl #119413]
o B::Concise has been upgraded from version 0.95 to 0.95_01.
This fixes a bug in dumping unexpected SEPCIALs.
o English has been upgraded from version 1.06 to 1.06_01. This fixes
an error about the performance of "$`", $&, and c<$'>.
o File::Glob has been upgraded from version 1.20 to 1.20_01.
Changes to Existing Documentation
o perlrepository has been restored with a pointer to more useful
o perlhack has been updated with the latest changes from blead.
Selected Bug Fixes
o Perl 5.18.1 introduced a regression along with a bugfix for lexical
subs. Some B::SPECIAL results from B::CV::GV became undefs
instead. This broke Devel::Cover among other libraries. This has
been fixed. [perl #119351]
o Perl 5.18.0 introduced a regression whereby "[:^ascii:]", if used
in the same character class as other qualifiers, would fail to
match characters in the Latin-1 block. This has been fixed. [perl
o Perl 5.18.0 introduced a regression when using ->SUPER::method with
AUTOLOAD by looking up AUTOLOAD from the current package, rather
than the current packageXs superclass. This has been fixed. [perl
o Perl 5.18.0 introduced a regression whereby "-bareword" was no
longer permitted under the "strict" and "integer" pragmata when
used together. This has been fixed. [perl #120288]
o Previously PerlIOBase_dup didn't check if pushing the new layer
o The construct "$r=qr/.../; /$r/p" is now handled properly, an issue
which had been worsened by changes 5.18.0. [perl #118213]
Perl 5.18.2 represents approximately 3 months of development since Perl
5.18.1 and contains approximately 980 lines of changes across 39 files
from 4 authors.
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 5.18.2:
Craig A. Berry, David Mitchell, Ricardo Signes, Tony Cook.
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.
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://rt.perl.org/perlbug/ . 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 firstname.lastname@example.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 please
send it to email@example.com. This points to a closed
subscription unarchived mailing list, which includes all the core
committers, who will be able to help assess the impact of issues,
figure out a resolution, and help co-ordinate the release of patches to
mitigate or fix the problem across all platforms on which Perl is
supported. Please only use this address for security issues in the
Perl core, not for modules independently distributed on CPAN.
The Changes file for an explanation of how to view exhaustive details
on what changed.
The INSTALL file for how to build Perl.
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