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PERL5233DELTA(1) Perl Programmers Reference Guide PERL5233DELTA(1)
NAME
[ this is a template for a new perldelta file. Any text flagged as XXX
needs to be processed before release. ]
perldelta - what is new for perl v5.23.3
DESCRIPTION
This document describes differences between the 5.23.2 release and the
5.23.3 release.
If you are upgrading from an earlier release such as 5.23.1, first read
perl5232delta, which describes differences between 5.23.1 and 5.23.2.
Notice
XXX Any important notices here
Core Enhancements
XXX New core language features go here. Summarize user-visible core
language enhancements. Particularly prominent performance
optimisations could go here, but most should go in the "Performance
Enhancements" section.
[ List each enhancement as a =head2 entry ]
"qr/(?[ ])/" now works in UTF-8 locales
Extended Bracketed Character Classes now will successfully compile when
"use locale" is in effect. The compiled pattern will use standard
Unicode rules. If the runtime locale is not a UTF-8 one, a warning is
raised and standard Unicode rules are used anyway. No tainting is done
since the outcome does not actually depend on the locale.
Security
XXX Any security-related notices go here. In particular, any security
vulnerabilities closed should be noted here rather than in the
"Selected Bug Fixes" section.
[ List each security issue as a =head2 entry ]
Incompatible Changes
XXX For a release on a stable branch, this section aspires to be:
There are no changes intentionally incompatible with 5.XXX.XXX
If any exist, they are bugs, and we request that you submit a
report. See L</Reporting Bugs> below.
[ List each incompatible change as a =head2 entry ]
Deprecations
XXX Any deprecated features, syntax, modules etc. should be listed
here.
Module removals
XXX Remove this section if inapplicable.
The following modules will be removed from the core distribution in a
future release, and will at that time need to be installed from CPAN.
Distributions on CPAN which require these modules will need to list
them as prerequisites.
The core versions of these modules will now issue "deprecated"-category
warnings to alert you to this fact. To silence these deprecation
warnings, install the modules in question from CPAN.
Note that these are (with rare exceptions) fine modules that you are
encouraged to continue to use. Their disinclusion from core primarily
hinges on their necessity to bootstrapping a fully functional, CPAN-
capable Perl installation, not usually on concerns over their design.
XXX XXX Note that deprecated modules should be listed here even if they
are listed as an updated module in the "Modules and Pragmata"
section.
[ List each other deprecation as a =head2 entry ]
Performance Enhancements
XXX Changes which enhance performance without changing behaviour go
here. There may well be none in a stable release.
[ List each enhancement as a =item entry ]
o XXX
Modules and Pragmata
XXX All changes to installed files in cpan/, dist/, ext/ and lib/ go
here. If Module::CoreList is updated, generate an initial draft of the
following sections using Porting/corelist-perldelta.pl. A paragraph
summary for important changes should then be added by hand. In an
ideal world, dual-life modules would have a Changes file that could be
cribbed.
[ Within each section, list entries as a =item entry ]
New Modules and Pragmata
o XXX
Updated Modules and Pragmata
o XXX has been upgraded from version A.xx to B.yy.
Removed Modules and Pragmata
o XXX
Documentation
XXX Changes to files in pod/ go here. Consider grouping entries by
file and be sure to link to the appropriate page, e.g. perlfunc.
New Documentation
XXX Changes which create new files in pod/ go here.
XXX
XXX Description of the purpose of the new file here
Changes to Existing Documentation
XXX Changes which significantly change existing files in pod/ go here.
However, any changes to pod/perldiag.pod should go in the "Diagnostics"
section.
XXX
o XXX Description of the change here
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.
XXX New or changed warnings emitted by the core's "C" code go here.
Also include any changes in perldiag that reconcile it to the "C" code.
New Diagnostics
XXX Newly added diagnostic messages go under here, separated into New
Errors and New Warnings
New Errors
o XXX message
New Warnings
o XXX message
Changes to Existing Diagnostics
XXX Changes (i.e. rewording) of diagnostic messages go here
o XXX Describe change here
Utility Changes
XXX Changes to installed programs such as perlbug and xsubpp go here.
Most of these are built within the directory utils.
[ List utility changes as a =head2 entry for each utility and =item
entries for each change Use XXX with program names to get proper
documentation linking. ]
XXX
o XXX
Configuration and Compilation
XXX Changes to Configure, installperl, installman, and analogous tools
go here. Any other changes to the Perl build process should be listed
here. However, any platform-specific changes should be listed in the
"Platform Support" section, instead.
[ List changes as a =item entry ].
o XXX
Testing
XXX Any significant changes to the testing of a freshly built perl
should be listed here. Changes which create new files in t/ go here as
do any large changes to the testing harness (e.g. when parallel testing
was added). Changes to existing files in t/ aren't worth summarizing,
although the bugs that they represent may be covered elsewhere.
[ List each test improvement as a =item entry ]
o XXX
Platform Support
XXX Any changes to platform support should be listed in the sections
below.
[ Within the sections, list each platform as a =item entry with
specific changes as paragraphs below it. ]
New Platforms
XXX List any platforms that this version of perl compiles on, that
previous versions did not. These will either be enabled by new files
in the hints/ directories, or new subdirectories and README files at
the top level of the source tree.
XXX-some-platform
XXX
Discontinued Platforms
XXX List any platforms that this version of perl no longer compiles on.
XXX-some-platform
XXX
Platform-Specific Notes
XXX List any changes for specific platforms. This could include
configuration and compilation changes or changes in
portability/compatibility. However, changes within modules for
platforms should generally be listed in the "Modules and Pragmata"
section.
EBCDIC "cmp()" and "sort()" fixed for UTF-EBCDIC strings
Comparing two strings that were both encoded in UTF-8 (or more
precisely, UTF-EBCDIC) did not work properly until now. Since
"sort()" uses "cmp()", this fixes that as well.
Win32
o Parallel building has been added to the dmake "makefile.mk"
makefile. All Win32 compilers are supported.
Internal Changes
XXX Changes which affect the interface available to "XS" code go here.
Other significant internal changes for future core maintainers should
be noted as well.
[ List each change as a =item entry ]
o XXX
Selected Bug Fixes
XXX Important bug fixes in the core language are summarized here. Bug
fixes in files in ext/ and lib/ are best summarized in "Modules and
Pragmata".
[ List each fix as a =item entry ]
o "qr/(?[ () ])/" no longer segfaults, giving a syntax error message
instead. [perl #125805]
o Regular expression possessive quantifier v5.20 regression now
fixed. "qr/"PAT"{"min,max"}+""/" is supposed to behave identically
to "qr/(?>"PAT"{"min,max"})/". Since v5.20, this didn't work if
min and max were equal. [perl #125825]
o "BEGIN <>" no longer segfaults and properly produces an error
message. [perl #125341]
Known Problems
XXX Descriptions of platform agnostic bugs we know we can't fix go
here. Any tests that had to be "TODO"ed for the release would be noted
here. Unfixed platform specific bugs also go here.
[ List each fix as a =item entry ]
o XXX
Errata From Previous Releases
o XXX Add anything here that we forgot to add, or were mistaken
about, in the perldelta of a previous release.
Obituary
XXX If any significant core contributor has died, we've added a short
obituary here.
Acknowledgements
XXX Generate this with:
perl Porting/acknowledgements.pl v5.23.2..HEAD
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 please
send it to perl5-security-report@perl.org. 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.
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.
perl v5.23.3 2015-09-08 PERL5233DELTA(1)