If you are upgrading from an earlier release such as 5.12.2, first readperl5123delta, which describes differences between 5.12.2and 5.12.3. The major changes made in 5.12.0 are described in perl5120delta.

Incompatible Changes

There are no changes intentionally incompatible with 5.12.3. If anyexist, they are bugs and reports are welcome.

Selected Bug Fixes

When strict "refs" mode is off, %{...} in rvalue context returnsundef if its argument is undefined. An optimisation introduced in Perl5.12.0 to make keys %{...} faster when used as a boolean did not takethis into account, causing keys %{+undef} (and keys %$foo when$foo is undefined) to be an error, which it should be so in strictmode only [perl #81750].

lc, uc, lcfirst, and ucfirst no longer return untainted stringswhen the argument is tainted. This has been broken since perl 5.8.9[perl #87336].

Fixed a case where it was possible that a freed buffer may have been readfrom when parsing a here document.

Modules and Pragmata

Module::CoreList has been upgraded from version 2.43 to 2.50.

Testing

The cpan/CGI/t/http.t test script has been fixed to work when theenvironment has HTTPS_* environment variables, such as HTTPS_PROXY.

Documentation

Updated the documentation for rand() in perlfunc to note that it is notcryptographically secure.

Platform Specific Notes

Linux
Support Ubuntu 11.04's new multi-arch library layout.

Acknowledgements

Perl 5.12.4 represents approximately 5 months of development sincePerl 5.12.3 and contains approximately 200 lines of changes across11 files from 8 authors.

Perl continues to flourish into its third decade thanks to a vibrantcommunity of users and developers. The following people are known tohave contributed the improvements that became Perl 5.12.4:

Andy Dougherty, David Golden, David Leadbeater, Father Chrysostomos,Florian Ragwitz, Jesse Vincent, Leon Brocard, Zsbán Ambrus.

Reporting Bugs

If you find what you think is a bug, you might check the articlesrecently posted to the comp.lang.perl.misc newsgroup and the perlbug database at http://rt.perl.org/perlbug/ . There may also beinformation at http://www.perl.org/ , the Perl Home Page.

If you believe you have an unreported bug, please run the perlbugprogram included with your release. Be sure to trim your bug downto a tiny but sufficient test case. Your bug report, along with theoutput of perl -V, will be sent off to [email protected] to beanalysed by the Perl porting team.

If the bug you are reporting has security implications, which make itinappropriate to send to a publicly archived mailing list, then please sendit to [email protected]. This points to a closed subscriptionunarchived mailing list, which includes all the core committers, who be ableto help assess the impact of issues, figure out a resolution, and helpco-ordinate the release of patches to mitigate or fix the problem across allplatforms on which Perl is supported. Please only use this address forsecurity issues in the Perl core, not for modules independentlydistributed on CPAN.

What is new for perl v5.12.4

Daftar Isi

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