perl5141delta - what is new for perl v5.14.1


   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.


   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.


   There have been no deprecations since 5.14.0.

Modules and Pragmata

   New Modules and Pragmata

   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


   New Documentation

   Changes to Existing Documentation

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

   *   Documentation for "use" now includes a pointer to


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


   *   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 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.


   *   The invocation documentation for "WIFEXITED", "WEXITSTATUS",


   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

   Changes to Existing Diagnostics

Utility Changes


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.


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

   *   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

   Discontinued Platforms

   Platform-Specific Notes

   *   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.


   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 Zsbn 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 .  There may also be
   information at , 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 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 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.


   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.


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