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            <h1>perl5222delta</h1>


  <!--    -->
<ul><li><a href="#NAME">NAME</a><li><a href="#DESCRIPTION">DESCRIPTION</a><li><a href="#Security">Security</a><ul><li><a href="#Fix-out-of-boundary-access-in-Win32-path-handling">Fix out of boundary access in Win32 path handling</a><li><a href="#Fix-loss-of-taint-in-canonpath()">Fix loss of taint in canonpath()</a><li><a href="#Set-proper-umask-before-calling-mkstemp(3)">Set proper umask before calling mkstemp(3)</a><li><a href="#Avoid-accessing-uninitialized-memory-in-Win32-crypt()">Avoid accessing uninitialized memory in Win32 crypt()</a><li><a href="#Remove-duplicate-environment-variables-from-environ">Remove duplicate environment variables from environ</a></ul><li><a href="#Incompatible-Changes">Incompatible Changes</a><li><a href="#Modules-and-Pragmata">Modules and Pragmata</a><ul><li><a href="#Updated-Modules-and-Pragmata">Updated Modules and Pragmata</a></ul><li><a href="#Documentation">Documentation</a><ul><li><a href="#Changes-to-Existing-Documentation">Changes to Existing Documentation</a></ul><li><a href="#Configuration-and-Compilation">Configuration and Compilation</a><li><a href="#Platform-Support">Platform Support</a><ul><li><a href="#Platform-Specific-Notes">Platform-Specific Notes</a></ul><li><a href="#Internal-Changes">Internal Changes</a><li><a href="#Selected-Bug-Fixes">Selected Bug Fixes</a><li><a href="#Acknowledgements">Acknowledgements</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>perl5222delta - what is new for perl v5.22.2</p>
<a name="DESCRIPTION"></a><h1>DESCRIPTION</h1>
<p>This document describes differences between the 5.22.1 release and the 5.22.2
release.</p>
<p>If you are upgrading from an earlier release such as 5.22.0, first read
<a href="perl5221delta.html">perl5221delta</a>, which describes differences between 5.22.0 and 5.22.1.</p>
<a name="Security"></a><h1>Security</h1>
<a name="Fix-out-of-boundary-access-in-Win32-path-handling"></a><h2>Fix out of boundary access in Win32 path handling</h2>
<p>This is CVE-2015-8608.  For more information see
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126755">[perl #126755]</a>.</p>
<a name="Fix-loss-of-taint-in-canonpath()"></a><h2>Fix loss of taint in <code class="inline"><span class="i">canonpath</span><span class="s">(</span><span class="s">)</span></code>
</h2>
<p>This is CVE-2015-8607.  For more information see
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126862">[perl #126862]</a>.</p>
<a name="Set-proper-umask-before-calling-mkstemp(3)"></a><h2>Set proper umask before calling <code class="inline"><span class="i">mkstemp</span><span class="s">(</span><span class="n">3</span><span class="s">)</span></code>
</h2>
<p>In 5.22.0 perl started setting umask to <code class="inline"><span class="n">0600</span></code>
 before calling <code class="inline"><span class="i">mkstemp</span><span class="s">(</span><span class="n">3</span><span class="s">)</span></code>

and restoring it afterwards.  This wrongfully tells <code class="inline"><a class="l_k" href="functions/open.html">open(2)</a></code> to strip the
owner read and write bits from the given mode before applying it, rather than
the intended negation of leaving only those bits in place.</p>
<p>Systems that use mode <code class="inline"><span class="n">0666</span></code>
 in <code class="inline"><span class="i">mkstemp</span><span class="s">(</span><span class="n">3</span><span class="s">)</span></code>
 (like old versions of glibc)
create a file with permissions <code class="inline"><span class="n">0066</span></code>
, leaving world read and write permissions
regardless of current umask.</p>
<p>This has been fixed by using umask <code class="inline"><span class="n">0177</span></code>
 instead.</p>
<p><a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127322">[perl #127322]</a></p>
<a name="Avoid-accessing-uninitialized-memory-in-Win32-crypt()"></a><h2>Avoid accessing uninitialized memory in Win32 <code class="inline"><a class="l_k" href="functions/crypt.html">crypt()</a></code></h2>
<p>Validation that will detect both a short salt and invalid characters in the
salt has been added.</p>
<p><a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126922">[perl #126922]</a></p>
<a name="Remove-duplicate-environment-variables-from-environ"></a><h2>Remove duplicate environment variables from <code class="inline"><span class="w">environ</span></code>
</h2>
<p>Previously, if an environment variable appeared more than once in <code class="inline"><span class="w">environ</span><span class="s">[</span><span class="s">]</span></code>
,
<a href="perlvar.html#%25ENV">%ENV </a> would contain the last entry for that name, while a
typical <code class="inline"><span class="i">getenv</span><span class="s">(</span><span class="s">)</span></code>
 would return the first entry.  We now make sure <code class="inline"><span class="i">%ENV</span></code>

contains the same as what <code class="inline"><span class="i">getenv</span><span class="s">(</span><span class="s">)</span></code>
 returns.</p>
<p>Secondly, we now remove duplicates from <code class="inline"><span class="w">environ</span><span class="s">[</span><span class="s">]</span></code>
, so if a setting with that
name is set in <code class="inline"><span class="i">%ENV</span></code>
 we won't pass an unsafe value to a child process.</p>
<p>This is CVE-2016-2381.</p>
<a name="Incompatible-Changes"></a><h1>Incompatible Changes</h1>
<p>There are no changes intentionally incompatible with Perl 5.22.1.  If any
exist, they are bugs, and we request that you submit a report.  See
<a href="#Reporting-Bugs">Reporting Bugs</a> below.</p>
<a name="Modules-and-Pragmata"></a><h1>Modules and Pragmata</h1>
<a name="Updated-Modules-and-Pragmata"></a><h2>Updated Modules and Pragmata</h2>
<ul>
<li>
<p><a href="File/Spec.html">File::Spec</a> has been upgraded from version 3.56 to 3.56_01.</p>
<p><code class="inline"><span class="i">canonpath</span><span class="s">(</span><span class="s">)</span></code>
 now preserves taint.  See <a href="#Fix-loss-of-taint-in-canonpath()">Fix loss of taint in canonpath()</a>.</p>
</li>
<li>
<p><a href="Module/CoreList.html">Module::CoreList</a> has been upgraded from version 5.20151213 to 5.20160429.</p>
<p>The version number of <a href="Digest/SHA.html">Digest::SHA</a> listed for Perl 5.18.4 was wrong and has
been corrected.  Likewise for the version number of <a href="Config.html">Config</a> in 5.18.3 and
5.18.4.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127624">[perl #127624]</a></p>
</li>
</ul>
<a name="Documentation"></a><h1>Documentation</h1>
<a name="Changes-to-Existing-Documentation"></a><h2>Changes to Existing Documentation</h2>
<a name="the-perldiag-manpage"></a><h3><a href="perldiag.html">perldiag</a></h3>
<ul>
<li>
<p>The explanation of the warning "unable to close filehandle %s properly: %s"
which can occur when doing an implicit close of a filehandle has been expanded
and improved.</p>
</li>
</ul>
<a name="the-perlfunc-manpage"></a><h3><a href="perlfunc.html">perlfunc</a></h3>
<ul>
<li>
<p>The documentation of <a href="functions/hex.html">hex</a> has been revised to clarify valid
inputs.</p>
</li>
</ul>
<a name="Configuration-and-Compilation"></a><h1>Configuration and Compilation</h1>
<ul>
<li>
<p>Dtrace builds now build successfully on systems with a newer dtrace that
require an input object file that uses the probes in the <i>.d</i> file.</p>
<p>Previously the probe would fail and cause a build failure.</p>
<p><a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d122287">[perl #122287]</a></p>
</li>
<li>
<p><i>Configure</i> no longer probes for <i>libnm</i> by default.  Originally this was the
"New Math" library, but the name has been re-used by the GNOME NetworkManager.</p>
<p><a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127131">[perl #127131]</a></p>
</li>
<li>
<p><i>Configure</i> now knows about gcc 5.</p>
</li>
<li>
<p>Compiling perl with <b>-DPERL_MEM_LOG</b> now works again.</p>
</li>
</ul>
<a name="Platform-Support"></a><h1>Platform Support</h1>
<a name="Platform-Specific-Notes"></a><h2>Platform-Specific Notes</h2>
<ul>
<li><a name="Darwin"></a><b>Darwin</b>
<p>Compiling perl with <b>-Dusecbacktrace</b> on Darwin now works again.</p>
<p><a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127764">[perl #127764]</a></p>
</li>
<li><a name="OS-X%2fDarwin"></a><b>OS X/Darwin</b>
<p>Builds with both <b>-DDEBUGGING</b> and threading enabled would fail with a "panic:
free from wrong pool" error when built or tested from Terminal on OS X.  This
was caused by perl's internal management of the environment conflicting with an
atfork handler using the libc <code class="inline"><span class="i">setenv</span><span class="s">(</span><span class="s">)</span></code>
 function to update the environment.</p>
<p>Perl now uses <code class="inline"><span class="i">setenv</span><span class="s">(</span><span class="s">)</span></code>
/<code class="inline"><span class="i">unsetenv</span><span class="s">(</span><span class="s">)</span></code>
 to update the environment on OS X.</p>
<p><a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126240">[perl #126240]</a></p>
</li>
<li><a name="ppc64el"></a><b>ppc64el</b>
<p>The floating point format of ppc64el (Debian naming for little-endian PowerPC)
is now detected correctly.</p>
</li>
<li><a name="Tru64"></a><b>Tru64</b>
<p>A test failure in <i>t/porting/extrefs.t</i> has been fixed.</p>
</li>
</ul>
<a name="Internal-Changes"></a><h1>Internal Changes</h1>
<ul>
<li>
<p>An unwarranted assertion in <code class="inline"><span class="i">Perl_newATTRSUB_x</span><span class="s">(</span><span class="s">)</span></code>
 has been removed.  If a stub
subroutine definition with a prototype has been seen, then any subsequent stub
(or definition) of the same subroutine with an attribute was causing an
assertion failure because of a null pointer.</p>
<p><a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126845">[perl #126845]</a></p>
</li>
</ul>
<a name="Selected-Bug-Fixes"></a><h1>Selected Bug Fixes</h1>
<ul>
<li>
<p>Calls to the placeholder <code class="inline"><span class="i">&amp;PL_sv_yes</span></code>
 used internally when an <code class="inline"><a class="l_k" href="functions/import.html">import()</a></code> or
<code class="inline"><span class="i">unimport</span><span class="s">(</span><span class="s">)</span></code>
 method isn't found now correctly handle scalar context.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126042">[perl #126042]</a></p>
</li>
<li>
<p>The <a href="functions/pipe.html">pipe</a> operator would assert for <code class="inline"><span class="w">DEBUGGING</span></code>
 builds
instead of producing the correct error message.  The condition asserted on is
detected and reported on correctly without the assertions, so the assertions
were removed.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126480">[perl #126480]</a></p>
</li>
<li>
<p>In some cases, failing to parse a here-doc would attempt to use freed memory.
This was caused by a pointer not being restored correctly.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126443">[perl #126443]</a></p>
</li>
<li>
<p>Perl now reports more context when it sees an array where it expects to see an
operator, and avoids an assertion failure.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d123737">[perl #123737]</a></p>
</li>
<li>
<p>If a here-doc was found while parsing another operator, the parser had already
read end of file, and the here-doc was not terminated, perl could produce an
assertion or a segmentation fault.  This now reliably complains about the
unterminated here-doc.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d125540">[perl #125540]</a></p>
</li>
<li>
<p>Parsing beyond the end of the buffer when processing a <code class="inline"><span class="c">#line</span></code>
 directive with
no filename is now avoided.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127334">[perl #127334]</a></p>
</li>
<li>
<p>Perl 5.22.0 added support for the C99 hexadecimal floating point notation, but
sometimes misparsed hex floats.  This has been fixed.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127183">[perl #127183]</a></p>
</li>
<li>
<p>Certain regex patterns involving a complemented posix class in an inverted
bracketed character class, and matching something else optionally would
improperly fail to match.  An example of one that could fail is
<code class="inline"><a class="l_k" href="functions/qr.html">qr/_?[^\Wbar]\x{100}/</a></code>.  This has been fixed.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127537">[perl #127537]</a></p>
</li>
<li>
<p>Fixed an issue with <a href="functions/pack.html">pack</a> where <code class="inline"><a class="l_k" href="functions/pack.html">pack</a> <span class="q">&quot;H&quot;</span></code>
 (and
<code class="inline"><a class="l_k" href="functions/pack.html">pack</a> <span class="q">&quot;h&quot;</span></code>
) could read past the source when given a non-utf8 source and a
utf8 target.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126325">[perl #126325]</a></p>
</li>
<li>
<p>Fixed some cases where perl would abort due to a segmentation fault, or a
C-level assert.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126193">[perl #126193]</a>
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126257">[perl #126257]</a>
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126258">[perl #126258]</a>
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126405">[perl #126405]</a>
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126602">[perl #126602]</a>
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127773">[perl #127773]</a>
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127786">[perl #127786]</a></p>
</li>
<li>
<p>A memory leak when setting <code class="inline"><span class="i">$ENV</span>{<span class="w">foo</span>}</code>
 on Darwin has been fixed.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126240">[perl #126240]</a></p>
</li>
<li>
<p>Perl now correctly raises an error when trying to compile patterns with
unterminated character classes while there are trailing backslashes.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126141">[perl #126141]</a></p>
</li>
<li>
<p><code class="inline"><span class="w">NOTHING</span></code>
 regops and <code class="inline"><span class="w">EXACTFU_SS</span></code>
 regops in <code class="inline"><span class="i">make_trie</span><span class="s">(</span><span class="s">)</span></code>
 are now handled
properly.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126206">[perl #126206]</a></p>
</li>
<li>
<p>Perl now only tests <code class="inline"><a class="l_k" href="functions/semctl.html">semctl()</a></code> if we have everything needed to use it.  In
FreeBSD the <code class="inline"><a class="l_k" href="functions/semctl.html">semctl()</a></code> entry point may exist, but it can be disabled by
policy.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d127533">[perl #127533]</a></p>
</li>
<li>
<p>A regression that allowed undeclared barewords as hash keys to work despite
strictures has been fixed.
<a href="http://search.cpan.org/perldoc/https:#%2frt.perl.org%2fTicket%2fDisplay.html%3fid%3d126981">[perl #126981]</a></p>
</li>
<li>
<p>As an optimization (introduced in Perl 5.20.0), <a href="functions/uc.html">uc</a>,
<a href="functions/lc.html">lc</a>, <a href="functions/ucfirst.html">ucfirst</a> and
<a href="functions/lcfirst.html">lcfirst</a> sometimes modify their argument in-place
rather than returning a modified copy.  The criteria for this optimization has
been made stricter to avoid these functions accidentally modifying in-place
when they should not, which has been happening in some cases, e.g. in
<a href="List/Util.html">List::Util</a>.</p>
</li>
<li>
<p>Excessive memory usage in the compilation of some regular expressions involving
non-ASCII characters has been reduced.  A more complete fix is forthcoming in
Perl 5.24.0.</p>
</li>
</ul>
<a name="Acknowledgements"></a><h1>Acknowledgements</h1>
<p>Perl 5.22.2 represents approximately 5 months of development since Perl 5.22.1
and contains approximately 3,000 lines of changes across 110 files from 24
authors.</p>
<p>Excluding auto-generated files, documentation and release tools, there were
approximately 1,500 lines of changes to 52 .pm, .t, .c and .h files.</p>
<p>Perl continues to flourish into its third decade thanks to a vibrant community
of users and developers.  The following people are known to have contributed
the improvements that became Perl 5.22.2:</p>
<p>Aaron Crane, Abigail, Andreas K&#xf6;nig, Aristotle Pagaltzis, Chris 'BinGOs'
Williams, Craig A. Berry, Dagfinn Ilmari Manns&#xe5;ker, David Golden, David
Mitchell, H.Merijn Brand, James E Keenan, Jarkko Hietaniemi, Karen Etheridge,
Karl Williamson, Matthew Horsfall, Niko Tyni, Ricardo Signes, Sawyer X, Stevan
Little, Steve Hay, Todd Rinaldo, Tony Cook, Vladimir Timofeev, Yves Orton.</p>
<p>The list above is almost certainly incomplete as it is automatically generated
from version control history.  In particular, it does not include the names of
the (very much appreciated) contributors who reported issues to the Perl bug
tracker.</p>
<p>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.</p>
<p>For a more complete list of all of Perl's historical contributors, please see
the <i>AUTHORS</i> file in the Perl source distribution.</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
https://rt.perl.org/ .  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 <a href="perlbug.html">perlbug</a> 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.</p>
<p>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-report@perl.org.  This points to a closed subscription
unarchived mailing list, which includes all the core committers, who will 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.</p>
<a name="SEE-ALSO"></a><h1>SEE ALSO</h1>
<p>The <i>Changes</i> file for an explanation of how to view 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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