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            <h1>perl586delta</h1>


  <!--    -->
<ul><li><a href="#NAME">NAME</a><li><a href="#DESCRIPTION">DESCRIPTION</a><li><a href="#Incompatible-Changes">Incompatible Changes</a><li><a href="#Core-Enhancements">Core Enhancements</a><li><a href="#Modules-and-Pragmata">Modules and Pragmata</a><li><a href="#Utility-Changes">Utility Changes</a><li><a href="#Performance-Enhancements">Performance Enhancements</a><li><a href="#Selected-Bug-Fixes">Selected Bug Fixes</a><li><a href="#New-or-Changed-Diagnostics">New or Changed Diagnostics</a><li><a href="#Changed-Internals">Changed Internals</a><li><a href="#New-Tests">New Tests</a><li><a href="#Reporting-Bugs">Reporting Bugs</a><li><a href="#SEE-ALSO">SEE ALSO</a></ul><a name="NAME"></a><h1>NAME</h1>
<p>perl586delta - what is new for perl v5.8.6</p>
<a name="DESCRIPTION"></a><h1>DESCRIPTION</h1>
<p>This document describes differences between the 5.8.5 release and
the 5.8.6 release.</p>
<a name="Incompatible-Changes"></a><h1>Incompatible Changes</h1>
<p>There are no changes incompatible with 5.8.5.</p>
<a name="Core-Enhancements"></a><h1>Core Enhancements</h1>
<p>The perl interpreter is now more tolerant of UTF-16-encoded scripts.</p>
<p>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 <i>README.win32</i>, particularly if you're running Win95.</p>
<a name="Modules-and-Pragmata"></a><h1>Modules and Pragmata</h1>
<ul>
<li>
<p>With the <code class="inline"><span class="w">base</span></code>
 pragma, an intermediate class with no fields used to messes
up private fields in the base class. This has been fixed.</p>
</li>
<li>
<p>Cwd upgraded to version 3.01 (as part of the new PathTools distribution)</p>
</li>
<li>
<p>Devel::PPPort upgraded to version 3.03</p>
</li>
<li>
<p>File::Spec upgraded to version 3.01 (as part of the new PathTools distribution)</p>
</li>
<li>
<p>Encode upgraded to version 2.08</p>
</li>
<li>
<p>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.</p>
</li>
<li>
<p>I18N::LangTags upgraded to version 0.35</p>
</li>
<li>
<p>Math::BigInt upgraded to version 1.73</p>
</li>
<li>
<p>Math::BigRat upgraded to version 0.13</p>
</li>
<li>
<p>MIME::Base64 upgraded to version 3.05</p>
</li>
<li>
<p>POSIX::sigprocmask function can now retrieve the current signal mask without
also setting it.</p>
</li>
<li>
<p>Time::HiRes upgraded to version 1.65</p>
</li>
</ul>
<a name="Utility-Changes"></a><h1>Utility Changes</h1>
<p>Perl has a new -dt command-line flag, which enables threads support in the
debugger.</p>
<a name="Performance-Enhancements"></a><h1>Performance Enhancements</h1>
<p><code class="inline"><a class="l_k" href="functions/reverse.html">reverse</a> <a class="l_k" href="functions/sort.html">sort</a> ...</code>
 is now optimized to sort in reverse, avoiding the
generation of a temporary intermediate list.</p>
<p><code class="inline">for <span class="s">(</span><a class="l_k" href="functions/reverse.html">reverse</a> <span class="i">@foo</span><span class="s">)</span></code>
 now iterates in reverse, avoiding the generation of a
temporary reversed list.</p>
<a name="Selected-Bug-Fixes"></a><h1>Selected Bug Fixes</h1>
<p>The regexp engine is now more robust when given invalid utf8 input, as is
sometimes generated by buggy XS modules.</p>
<p><code class="inline">foreach</code>
 on threads::shared array used to be able to crash Perl. This bug
has now been fixed.</p>
<p>A regexp in <code class="inline"><span class="w">STDOUT</span></code>
's destructor used to coredump, because the regexp pad
was already freed. This has been fixed.</p>
<p><code class="inline"><a class="l_k" href="functions/goto.html">goto</a> <span class="i">&amp;</span></code>
 is now more robust - bugs in deep recursion and chained <code class="inline"><a class="l_k" href="functions/goto.html">goto</a> <span class="i">&amp;</span></code>

have been fixed.</p>
<p>Using <code class="inline"><a class="l_k" href="functions/delete.html">delete</a></code> on an array no longer leaks memory. A <code class="inline"><a class="l_k" href="functions/pop.html">pop</a></code> of an item from a
shared array reference no longer causes a leak.</p>
<p><code class="inline"><span class="i">eval_sv</span><span class="s">(</span><span class="s">)</span></code>
 failing a taint test could corrupt the stack - this has been
fixed.</p>
<p>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.</p>
<p><code class="inline"><a class="l_k" href="functions/read.html">read</a></code> into a UTF8-encoded buffer with an offset off the end of the buffer
no longer mis-calculates buffer lengths.</p>
<p>Although Perl has promised since version 5.8 that <code class="inline"><a class="l_k" href="functions/sort.html">sort()</a></code> would be
stable, the two cases <code class="inline"><a class="l_k" href="functions/sort.html">sort</a> <span class="s">{</span><span class="i">$b</span> cmp <span class="i">$a</span><span class="s">}</span></code>
 and <code class="inline"><a class="l_k" href="functions/sort.html">sort</a> <span class="s">{</span><span class="i">$b</span> &lt;=&gt; <span class="i">$a</span><span class="s">}</span></code>
 could
produce non-stable sorts.   This is corrected in perl5.8.6.</p>
<p>Localising <code class="inline"><span class="i">$^D</span></code>
 no longer generates a diagnostic message about valid -D
flags.</p>
<a name="New-or-Changed-Diagnostics"></a><h1>New or Changed Diagnostics</h1>
<p>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</p>
<a name="Changed-Internals"></a><h1>Changed Internals</h1>
<p>From now on all applications embedding perl will behave as if perl
were compiled with -DPERL_USE_SAFE_PUTENV.  See "Environment access" in
the <i>INSTALL</i> file for details.</p>
<p>Most <code class="inline"><span class="w">C</span></code>
 source files now have comments at the top explaining their purpose,
which should help anyone wishing to get an overview of the implementation.</p>
<a name="New-Tests"></a><h1>New Tests</h1>
<p>There are significantly more tests for the <code class="inline"><span class="w">B</span></code>
 suite of modules.</p>
<a name="Reporting-Bugs"></a><h1>Reporting Bugs</h1>
<p>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 <a href="http://bugs.perl.org">http://bugs.perl.org</a>.  There may also be
information at <a href="http://www.perl.org">http://www.perl.org</a>, the Perl Home Page.</p>
<p>If you believe you have an unreported bug, please run the <b>perlbug</b>
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 <code class="inline"><span class="w">perl</span> -<span class="w">V</span></code>
, 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 <a href="http://bugs.perl.org/">http://bugs.perl.org/</a></p>
<a name="SEE-ALSO"></a><h1>SEE ALSO</h1>
<p>The <i>Changes</i> file for exhaustive details on what changed.</p>
<p>The <i>INSTALL</i> file for how to build Perl.</p>
<p>The <i>README</i> file for general stuff.</p>
<p>The <i>Artistic</i> and <i>Copying</i> files for copyright information.</p>




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