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NAME


perl5141delta - what is new for perl v5.14.1

DESCRIPTION


This document describes differences between the 5.14.0 release and the 5.14.1 release.

If you are upgrading from an earlier release such as 5.12.0, first read perl5140delta,
which describes differences between 5.12.0 and 5.14.0.

Core Enhancements


No changes since 5.14.0.

Security


No changes since 5.14.0.

Incompatible Changes


There are no changes intentionally incompatible with 5.14.0. If any exist, they are bugs
and reports are welcome.

Deprecations


There have been no deprecations since 5.14.0.

Modules and Pragmata


New Modules and Pragmata
None

Updated Modules and Pragmata
· B::Deparse has been upgraded from version 1.03 to 1.04, to address two regressions in
Perl 5.14.0:

Deparsing of the "glob" operator and its diamond ("<>") form now works again. [perl
#90898]

The presence of subroutines named "::::" or "::::::" no longer causes B::Deparse to
hang.

· Pod::Perldoc has been upgraded from version 3.15_03 to 3.15_04.

It corrects the search paths on VMS. [perl #90640]

Removed Modules and Pragmata
None

Documentation


New Documentation
None

Changes to Existing Documentation
perlfunc

· "given", "when" and "default" are now listed in perlfunc.

· Documentation for "use" now includes a pointer to if.pm.

perllol

· perllol has been expanded with examples using the new "push $scalar" syntax introduced
in Perl 5.14.0.

perlop

· The explanation of bitwise operators has been expanded to explain how they work on
Unicode strings.

· The section on the triple-dot or yada-yada operator has been moved up, as it used to
separate two closely related sections about the comma operator.

· More examples for "m//g" have been added.

· The "<<\FOO" here-doc syntax has been documented.

perlrun

· perlrun has undergone a significant clean-up. Most notably, the -0x... form of the -0
flag has been clarified, and the final section on environment variables has been
corrected and expanded.

POSIX

· The invocation documentation for "WIFEXITED", "WEXITSTATUS", "WIFSIGNALED",
"WTERMSIG", "WIFSTOPPED", and "WSTOPSIG" was corrected.

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.

New Diagnostics
None

Changes to Existing Diagnostics
None

Utility Changes


None

Configuration and Compilation


· regexp.h has been modified for compatibility with GCC's "-Werror" option, as used by
some projects that include perl's header files.

Testing


· Some test failures in dist/Locale-Maketext/t/09_compile.t that could occur depending
on the environment have been fixed. [perl #89896]

· A watchdog timer for t/re/re.t was lengthened to accommodate SH-4 systems which were
unable to complete the tests before the previous timer ran out.

Platform Support


New Platforms
None

Discontinued Platforms
None

Platform-Specific Notes
Solaris

· Documentation listing the Solaris packages required to build Perl on Solaris 9 and
Solaris 10 has been corrected.

Mac OS X

· The lib/locale.t test script has been updated to work on the upcoming Lion release.

· Mac OS X specific compilation instructions have been clarified.

Ubuntu Linux

· The ODBM_File installation process has been updated with the new library paths on
Ubuntu natty.

Internal Changes


· The compiled representation of formats is now stored via the mg_ptr of their
PERL_MAGIC_fm. Previously it was stored in the string buffer, beyond SvLEN(), the
regular end of the string. SvCOMPILED() and SvCOMPILED_{on,off}() now exist solely for
compatibility for XS code. The first is always 0, the other two now no-ops.

Bug Fixes


· A bug has been fixed that would cause a "Use of freed value in iteration" error if the
next two hash elements that would be iterated over are deleted. [perl #85026]

· Passing the same constant subroutine to both "index" and "formline" no longer causes
one or the other to fail. [perl #89218]

· 5.14.0 introduced some memory leaks in regular expression character classes such as
"[\w\s]", which have now been fixed.

· An edge case in regular expression matching could potentially loop. This happened
only under "/i" in bracketed character classes that have characters with multi-
character folds, and the target string to match against includes the first portion of
the fold, followed by another character that has a multi-character fold that begins
with the remaining portion of the fold, plus some more.

"s\N{U+DF}" =~ /[\x{DF}foo]/i

is one such case. "\xDF" folds to "ss".

· Several Unicode case-folding bugs have been fixed.

· The new (in 5.14.0) regular expression modifier "/a" when repeated like "/aa" forbids
the characters outside the ASCII range that match characters inside that range from
matching under "/i". This did not work under some circumstances, all involving
alternation, such as:

"\N{KELVIN SIGN}" =~ /k|foo/iaa;

succeeded inappropriately. This is now fixed.

· Fixed a case where it was possible that a freed buffer may have been read from when
parsing a here document.

Acknowledgements


Perl 5.14.1 represents approximately four weeks of development since Perl 5.14.0 and
contains approximately 3500 lines of changes across 38 files from 17 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 5.14.1:

Bo Lindbergh, Claudio Ramirez, Craig A. Berry, David Leadbeater, Father Chrysostomos,
Jesse Vincent, Jim Cromie, Justin Case, Karl Williamson, Leo Lapworth, Nicholas Clark,
Nobuhiro Iwamatsu, smash, Tom Christiansen, Ton Hospel, Vladimir Timofeev, and Zsban
Ambrus.

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://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 [email protected] 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 protected]. This points to a closed subscription unarchived mailing
list, which includes all the core committers, who 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.

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