PERL5114DELTA(1)                                Perl Programmers Reference Guide                                PERL5114DELTA(1)



NAME
       perl5114delta - what is new for perl v5.11.4

DESCRIPTION
       This document describes differences between the 5.11.3 release and the 5.11.4 release.

       If you are upgrading from an earlier release such as 5.11.2, first read perl5113delta, which describes differences
       between 5.11.2 and 5.11.3.

Incompatible Changes
   Version number formats
       Acceptable version number formats have been formalized into "strict" and "lax" rules.  "package NAME VERSION" takes a
       strict version number.  "use NAME VERSION" takes a lax version number.  "UNIVERSAL::VERSION" and the version object
       constructors take lax version numbers.  Providing an invalid version will result in a fatal error.

       These formats will be documented fully in the version module in a subsequent release of Perl 5.11.  To a first
       approximation, a "strict" version number is a positive decimal number (integer or decimal-fraction) without
       exponentiation or else a dotted-decimal v-string with a leading 'v' character and at least three components.  A "lax"
       version number allows v-strings with fewer than three components or without a leading 'v'.  Under "lax" rules, both
       decimal and dotted-decimal versions may have a trailing "alpha" component separated by an underscore character after a
       fractional or dotted-decimal component.

       The version module adds "version::is_strict" and "version::is_lax" functions to check a scalar against these rules.

Core Enhancements
   Unicode properties
       "\p{XDigit}" now matches the same characters as "\p{Hex_Digit}".  This means that in addition to the characters it
       currently matches, "[A-Fa-f0-9]", it will also match their fullwidth equivalent forms, for example U+FF10: FULLWIDTH
       DIGIT ZERO.

Modules and Pragmata
   Pragmata Changes
       "less"
           Upgraded from version 0.02 to 0.03.

           This version introduces the "stash_name" method to allow subclasses of less to pick where in %^H to store their
           stash.

       "version"
           Upgraded from version 0.77 to 0.81.

           This version adds support for "Version number formats" as described earlier in this document and in its own
           documentation.

       "warnings"
           Upgraded from version 1.08 to 1.09.

           This version adds the "illegalproto" warning category.  See also "New or Changed Diagnostics" for this change.

   Updated Modules
       "Archive::Extract"
           Upgraded from version 0.36 to 0.38.

       "B::Deparse"
           Upgraded from version 0.93 to 0.94.

       "Compress::Raw::Bzip2"
           Upgraded from version 2.021 to 2.024.

       "Compress::Raw::Zlib"
           Upgraded from version 2.021 to 2.024.

       "CPAN"
           Upgraded from version 1.94_5301 to 1.94_54.

       "File::Fetch"
           Upgraded from version 0.22 to 0.24.

       "Module::Build"
           Upgraded from version 0.36 to 0.3603.

       "Safe"
           Upgraded from version 2.20 to 2.21.

           Anonymous coderefs created in Safe containers no longer get bogus arguments passed to them, fixing RT #72068.

   Removed Modules and Pragmata
       "Devel::DProf::V"
           Removed from the Perl core.  Prior version was 'undef'.

Changes to Existing Documentation
       A significant fraction of the core documentation has been updated to clarify the behavior of Perl's Unicode handling.

       Much of the remaining core documentation has been reviewed and edited for clarity, consistent use of language, and to fix
       the spelling of Tom Christiansen's name.

   Configuration improvements
       USE_ATTRIBUTES_FOR_PERLIO is now reported in the compile-time options listed by the "-V" switch.

   Platform Specific Changes
       VMS The default pipe buffer size on VMS has been updated to 8192 on 64-bit systems.

Selected Bug Fixes
       o   Tie::Hash::NamedCapture::* shouldn't abort if passed bad input (RT #71828)

       o   @_ and $_ no longer leak under threads (RT #34342 and #41138, also #70602, #70974)

New or Changed Diagnostics
       New warning category "illegalproto"
           The two warnings :

             Illegal character in prototype for %s : %s
             Prototype after '%c' for %s : %s

           have been moved from the "syntax" top-level warnings category into a new first-level category, "illegalproto". These
           two warnings are currently the only ones emitted during parsing of an invalid/illegal prototype, so one can now do

             no warnings 'illegalproto';

           to suppress only those, but not other syntax-related warnings. Warnings where prototypes are changed, ignored, or not
           met are still in the "prototype" category as before. (Matt S. Trout)

       lvalue attribute ignored after the subroutine has been defined
           This new warning is issued when one attempts to mark a subroutine as lvalue after it has been defined.

Changed Internals
       o   Perl_magic_setmglob now knows about globs, fixing RT #71254.

Known Problems
       Perl 5.11.4 is a development release leading up to Perl 5.12.0.  Some notable known problems found in 5.11.4 are listed
       as dependencies of RT #69710, the Perl 5 version 12 meta-ticket.

Deprecations
       The following items are now deprecated.

       "UNIVERSAL->import()"
           The method "UNIVERSAL->import()" is now deprecated.  Attempting to pass import arguments to a "use UNIVERSAL"
           statement will result in a deprecation warning. (This is a less noisy version of the full deprecation warning added
           in 5.11.0.)

Acknowledgements
       Perl 5.11.4 represents approximately one month of development since Perl 5.11.3 and contains 17682 lines of changes
       across 318 files from 40 authors and committers:

       Abigail, Andy Dougherty, brian d foy, Chris Williams, Craig A. Berry, David Golden, David Mitchell, Father Chrysostomos,
       Gerard Goossen, H.Merijn Brand, Jesse Vincent, Jim Cromie, Josh ben Jore, Karl Williamson, kmx, Matt S Trout, Nicholas
       Clark, Niko Tyni, Paul Marquess, Philip Hazel, Rafael Garcia-Suarez, Rainer Tammer, Reini Urban, Ricardo Signes, Shlomi
       Fish, Tim Bunce, Todd Rinaldo, Tom Christiansen, Tony Cook, Vincent Pit, and Zefram

       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.

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 perlbugATperl.org to be analyzed 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-reportATperl.org. 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.

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 v5.12.4                                               2011-06-01                                           PERL5114DELTA(1)