perl586delta


DESCRIPTION
       This document describes differences between the 5.8.5 release and the
       5.8.6 release.

Incompatible Changes
       There are no changes incompatible with 5.8.5.

Core Enhancements
       The perl interpreter is now more tolerant of UTF-16-encoded scripts.

       On Win32, Perl can now use non-IFS compatible LSPs, which allows Perl
       to work in conjunction with firewalls such as McAfee Guardian. For full
       details see the file README.win32, particularly if you're running
       Win95.

Modules and Pragmata
       o   With the "base" pragma, an intermediate class with no fields used
           to messes up private fields in the base class. This has been fixed.

       o   Cwd upgraded to version 3.01 (as part of the new PathTools
           distribution)

       o   Devel::PPPort upgraded to version 3.03

       o   File::Spec upgraded to version 3.01 (as part of the new PathTools
           distribution)

       o   Encode upgraded to version 2.08

       o   ExtUtils::MakeMaker remains at version 6.17, as later stable
           releases currently available on CPAN have some issues with core
           modules on some core platforms.

       o   I18N::LangTags upgraded to version 0.35

       o   Math::BigInt upgraded to version 1.73

       o   Math::BigRat upgraded to version 0.13

       o   MIME::Base64 upgraded to version 3.05

       o   POSIX::sigprocmask function can now retrieve the current signal
           mask without also setting it.

       o   Time::HiRes upgraded to version 1.65

Utility Changes
       Perl has a new -dt command-line flag, which enables threads support in
       the debugger.

Performance Enhancements
       "reverse sort ..." is now optimized to sort in reverse, avoiding the
       generation of a temporary intermediate list.
       pad was already freed. This has been fixed.

       "goto &" is now more robust - bugs in deep recursion and chained "goto
       &" have been fixed.

       Using "delete" on an array no longer leaks memory. A "pop" of an item
       from a shared array reference no longer causes a leak.

       "eval_sv()" failing a taint test could corrupt the stack - this has
       been fixed.

       On platforms with 64 bit pointers numeric comparison operators used to
       erroneously compare the addresses of references that are overloaded,
       rather than using the overloaded values. This has been fixed.

       "read" into a UTF8-encoded buffer with an offset off the end of the
       buffer no longer mis-calculates buffer lengths.

       Although Perl has promised since version 5.8 that "sort()" would be
       stable, the two cases "sort {$b cmp $a}" and "sort {$b <=> $a}" could
       produce non-stable sorts.   This is corrected in perl5.8.6.

       Localising $^D no longer generates a diagnostic message about valid -D
       flags.

New or Changed Diagnostics
       For -t and -T,
          Too late for "-T" option has been changed to the more informative
          "-T" is on the #! line, it must also be used on the command line

Changed Internals
       From now on all applications embedding perl will behave as if perl were
       compiled with -DPERL_USE_SAFE_PUTENV.  See "Environment access" in the
       INSTALL file for details.

       Most "C" source files now have comments at the top explaining their
       purpose, which should help anyone wishing to get an overview of the
       implementation.

New Tests
       There are significantly more tests for the "B" suite of modules.

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://bugs.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.  You can browse and search the Perl 5 bugs at
       http://bugs.perl.org/

perl v5.14.2                      2011-07-09                   PERL586DELTA(1)
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