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PERL586DELTA(1pm)      Perl Programmers Reference Guide      PERL586DELTA(1pm)


       perl586delta - what is new for perl v5.8.6


       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

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

       o   Devel::PPPort upgraded to version 3.03

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

       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.

       "for (reverse @foo)" now iterates in reverse, avoiding the generation
       of a temporary reversed list.

Selected Bug Fixes

       The regexp engine is now more robust when given invalid utf8 input, as
       is sometimes generated by buggy XS modules.

       "foreach" on threads::shared array used to be able to crash Perl. This
       bug has now been fixed.

       A regexp in "STDOUT"'s destructor used to coredump, because the regexp
       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

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

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 .  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.  You can browse and search the Perl 5 bugs at


       The Changes file for 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 v5.24.0                      2015-10-14                 PERL586DELTA(1pm)

perl 5.24 - Generated Sun Nov 27 13:07:30 CST 2016
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