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perl582delta (1)


perl582delta - what is new for perl v5.8.2


Please see following description for synopsis


Perl Programmers Reference Guide                  PERL582DELTA(1)

     perl582delta - what is new for perl v5.8.2

     This document describes differences between the 5.8.1
     release and the 5.8.2 release.

     If you are upgrading from an earlier release such as 5.6.1,
     first read the perl58delta, which describes differences
     between 5.6.0 and 5.8.0, and the perl581delta, which
     describes differences between 5.8.0 and 5.8.1.

Incompatible Changes
     For threaded builds for modules calling certain re-entrant
     system calls, binary compatibility was accidentally lost
     between 5.8.0 and 5.8.1.  Binary compatibility with 5.8.0
     has been restored in 5.8.2, which necessitates breaking
     compatibility with 5.8.1. We see this as the lesser of two

     This will only affect people who have a threaded perl 5.8.1,
     and compiled modules which use these calls, and now attempt
     to run the compiled modules with 5.8.2. The fix is to re-
     compile and re-install the modules using 5.8.2.

Core Enhancements
  Hash Randomisation
     The hash randomisation introduced with 5.8.1 has been
     amended. It transpired that although the implementation
     introduced in 5.8.1 was source compatible with 5.8.0, it was
     not binary compatible in certain cases. 5.8.2 contains an
     improved implementation which is both source and binary
     compatible with both 5.8.0 and 5.8.1, and remains robust
     against the form of attack which prompted the change for

     We are grateful to the Debian project for their input in
     this area.  See "Algorithmic Complexity Attacks" in perlsec
     for the original rationale behind this change.

     Several memory leaks associated with variables shared
     between threads have been fixed.

Modules and Pragmata
  Updated Modules And Pragmata
     The following modules and pragmata have been updated since
     Perl 5.8.1:


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Perl Programmers Reference Guide                  PERL582DELTA(1)

         Documentation improved

         Documentation improved

         Documentation improved

Selected Bug Fixes
     Some syntax errors involving unrecognized filetest operators
     are now handled correctly by the parser.

Changed Internals
     Interpreter initialization is more complete when
     -DMULTIPLICITY is off.  This should resolve problems with
     initializing and destroying the Perl interpreter more than
     once in a single process.

Platform Specific Problems
     Dynamic linker flags have been tweaked for Solaris and OS X,
     which should solve problems seen while building some XS

     Bugs in OS/2 sockets and tmpfile have been fixed.

     In OS X "setreuid" and friends are troublesome - perl will
     now work around their problems as best possible.

Future Directions
     Starting with 5.8.3 we intend to make more frequent
     maintenance releases, with a smaller number of changes in
     each. The intent is to propagate bug fixes out to stable
     releases more rapidly and make upgrading stable releases
     less of an upheaval. This should give end users more
     flexibility in their choice of upgrade timing, and allow
     them easier assessment of the impact of upgrades. The
     current plan is for code freezes as follows

     o   5.8.3 23:59:59 GMT, Wednesday December 31st 2003

     o   5.8.4 23:59:59 GMT, Wednesday March 31st 2004

     o   5.8.5 23:59:59 GMT, Wednesday June 30th 2004

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     with the release following soon after, when testing is

     See "Future Directions" in perl581delta for more

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

     See attributes(5) for descriptions of the following

     |Availability   | runtime/perl-512 |
     |Stability      | Uncommitted      |
     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.

     This software was built from source available at  The original
     community source was downloaded from

     Further information about this software can be found on the
     open source community website at

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