=head1 Core Enhancements
-XXX New core language features go here. Summarize user-visible core language
-enhancements. Particularly prominent performance optimisations could go
-here, but most should go in the L</Performance Enhancements> section.
+=head2 C<defined(@array = LIST)> is no longer fatal
-[ List each enhancement as a =head2 entry ]
+In 5.21.1, C<defined(@array)> was made fatal. This has been relaxed
+to not die if the argument is assigning to an array.
=head1 Security
-XXX Any security-related notices go here. In particular, any security
-vulnerabilities closed should be noted here rather than in the
-L</Selected Bug Fixes> section.
+=head2 The L<Safe> module could allow outside packages to be replaced
-[ List each security issue as a =head2 entry ]
+Critical bugfix: outside packages could be replaced. L<Safe> has
+been patched to 2.38 to address this.
=head1 Incompatible Changes
-XXX For a release on a stable branch, this section aspires to be:
-
- There are no changes intentionally incompatible with 5.XXX.XXX
- If any exist, they are bugs, and we request that you submit a
- report. See L</Reporting Bugs> below.
-
-[ List each incompatible change as a =head2 entry ]
-
=head2 S<C<use UNIVERSAL '...'>> is now a fatal error
Importing functions from C<UNIVERSAL> has been deprecated since v5.12, and
is now a fatal error. S<C<"use UNIVERSAL">> without any arguments is still
allowed.
-=head1 Deprecations
+=head1 Modules and Pragmata
-XXX Any deprecated features, syntax, modules etc. should be listed here.
+=head2 Updated Modules and Pragmata
-=head2 Module removals
+=over 4
-XXX Remove this section if inapplicable.
+=item *
-The following modules will be removed from the core distribution in a
-future release, and will at that time need to be installed from CPAN.
-Distributions on CPAN which require these modules will need to list them as
-prerequisites.
+L<B::Debug> has been upgraded from version 1.19 to 1.21
-The core versions of these modules will now issue C<"deprecated">-category
-warnings to alert you to this fact. To silence these deprecation warnings,
-install the modules in question from CPAN.
+=item *
-Note that these are (with rare exceptions) fine modules that you are encouraged
-to continue to use. Their disinclusion from core primarily hinges on their
-necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
-not usually on concerns over their design.
+L<Config::Perl::V> has been upgraded from version 0.20 to 0.22.
-=over
+=item *
-=item XXX
+L<CPAN::Meta> has been upgraded from version 2.141520 to 2.142060.
-XXX Note that deprecated modules should be listed here even if they are listed
-as an updated module in the L</Modules and Pragmata> section.
+=item *
-=back
+L<CPAN::Meta::Requirements> has been upgraded from version 2.125 to 2.126.
-[ List each other deprecation as a =head2 entry ]
+=item *
-=head1 Performance Enhancements
+L<ExtUtils::Manifest> has been upgraded from version 1.64 to 1.65.
-XXX Changes which enhance performance without changing behaviour go here.
-There may well be none in a stable release.
+The MANIFEST is now opened with C<:raw>, to prevent C<CRLF>s leaking in.
-[ List each enhancement as a =item entry ]
+=item *
-=over 4
+L<HTTP::Tiny> has been upgraded from version 0.043 to 0.047.
=item *
-XXX
+L<perl5db.pl> has been upgraded from version 1.45 to 1.46.
-=back
+Fixed the scope level handling of the debugger's C<y> command.
-=head1 Modules and Pragmata
+=item *
-XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
-go here. If Module::CoreList is updated, generate an initial draft of the
-following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
-for important changes should then be added by hand. In an ideal world,
-dual-life modules would have a F<Changes> file that could be cribbed.
+L<POSIX> has been upgraded from version 1.41 to 1.42.
-[ Within each section, list entries as a =item entry ]
+Replaced the thread-unsafe code used to prevent duplicate warning
+messages for using the isxxx() functions. [perl #122476]
-=head2 New Modules and Pragmata
+=item *
-=over 4
+L<Safe> has been upgraded from version 2.37 to 2.38.
+
+Critical bugfix: outside packages could be replaced.
=item *
-XXX
+L<Socket> has been upgraded from version 2.014 to 2.015.
+
+Test suite updates, particularly useful for Solaris and cygwin, and
+a slight change to the pattern used for IPv4 address matching.
=back
-=head2 Updated Modules and Pragmata
+=head1 Documentation
+
+=head2 Changes to Existing Documentation
+
+=head3 L<perlexperiment>
=over 4
=item *
-L<perl5db.pl> has been upgraded from version 1,45 to 1.46.
+Added reference to L<feature>.
-Fixed the scope level handling of the debugger's C<y> command.
+=back
-=item *
+=head3 L<perlguts>
-L<POSIX> has been upgraded from version 1.41 to 1.42.
+=over 4
-Replaced the thread-unsafe code used to prevent duplicate warning
-messages for using the isxxx() functions. [perl #122476]
+=item *
+
+Details on C level symbols and libperl.t added.
=back
-=head2 Removed Modules and Pragmata
+=head3 L<perlhacktips>
=over 4
=item *
-XXX
-
+Recommended replacements for tmpfile, atoi, strtol, and strtoul added.
+
=back
-=head1 Documentation
+=head3 L<perlop>
-XXX Changes to files in F<pod/> go here. Consider grouping entries by
-file and be sure to link to the appropriate page, e.g. L<perlfunc>.
+=over 4
-=head2 New Documentation
+=item *
-XXX Changes which create B<new> files in F<pod/> go here.
+ASCII v. EBCDIC clarifications added.
-=head3 L<XXX>
+=back
-XXX Description of the purpose of the new file here
+=head3 L<perlsec>
-=head2 Changes to Existing Documentation
+=over 4
+
+=item *
+
+Comments added on algorithmic complexity and tied hashes.
-XXX Changes which significantly change existing files in F<pod/> go here.
-However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
-section.
+=back
-=head3 L<XXX>
+=head3 L<perlvms>
=over 4
=item *
-XXX Description of the change here
+Updated documentation on environment and shell interaction in VMS.
=back
including warnings and fatal error messages. For the complete list of
diagnostic messages, see L<perldiag>.
-XXX New or changed warnings emitted by the core's C<C> code go here. Also
-include any changes in L<perldiag> that reconcile it to the C<C> code.
-
=head2 New Diagnostics
-XXX Newly added diagnostic messages go under here, separated into New Errors
-and New Warnings
-
=head3 New Errors
=over 4
=item *
-XXX L<message|perldiag/"message">
+L<Hexadecimal float: internal error|perldiag/"Hexadecimal float: internal error">
+
+(F) Something went horribly bad in hexadecimal float handling.
+
+=item *
+
+L<Hexadecimal float: unsupported long double format|perldiag/"Hexadecimal float: unsupported long double format">
+
+(F) You have configured Perl to use long doubles but
+the internals of the long double format are unknown,
+therefore the hexadecimal float output is impossible.
=back
=item *
-XXX L<message|perldiag/"message">
+L<Hexadecimal float: exponent overflow|perldiag/"Hexadecimal float: exponent overflow">
-=back
+(W overflow) The hexadecimal floating point has larger exponent
+than the floating point supports.
-=head2 Changes to Existing Diagnostics
+=item *
-XXX Changes (i.e. rewording) of diagnostic messages go here
+L<Hexadecimal float: exponent underflow|perldiag/"Hexadecimal float: exponent underflow">
-=over 4
+(W overflow) The hexadecimal floating point has smaller exponent
+than the floating point supports.
=item *
-XXX Describe change here
+L<Hexadecimal float: mantissa overflow|perldiag/"Hexadecimal float: mantissa overflow">
-=back
+(W overflow) The hexadecimal floating point literal had more bits in
+the mantissa (the part between the 0x and the exponent, also known as
+the fraction or the significand) than the floating point supports.
-=head1 Utility Changes
+=item *
-XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
-Most of these are built within the directory F<utils>.
+L<Hexadecimal float: precision loss|perldiag/"Hexadecimal float: precision loss">
-[ List utility changes as a =head2 entry for each utility and =item
-entries for each change
-Use L<XXX> with program names to get proper documentation linking. ]
+(W overflow) The hexadecimal floating point had internally more
+digits than could be output. This can be caused by unsupported
+long double formats, or by 64-bit integers not being available
+(needed to retrieve the digits under some configurations).
-=head2 L<XXX>
+=back
+
+=head2 Changes to Existing Diagnostics
=over 4
=item *
-XXX
+L<require> with no argument or undef used to warn about a Null filename; now
+it dies with C<Missing or undefined argument to require>.
=back
=item *
-XXX
+Internal handling of floating point values has been improved.
+
+=item *
+
+MurmurHash64A and MurmurHash64B can now be configured as the internal hash
+function.
=back
=head1 Platform Support
-XXX Any changes to platform support should be listed in the sections below.
-
-[ Within the sections, list each platform as a =item entry with specific
-changes as paragraphs below it. ]
-
-=head2 New Platforms
-
-XXX List any platforms that this version of perl compiles on, that previous
-versions did not. These will either be enabled by new files in the F<hints/>
-directories, or new subdirectories and F<README> files at the top level of the
-source tree.
-
-=over 4
-
-=item XXX-some-platform
-
-XXX
-
-=back
-
-=head2 Discontinued Platforms
-
-XXX List any platforms that this version of perl no longer compiles on.
+=head2 Platform-Specific Notes
=over 4
-=item XXX-some-platform
+=item Android
-XXX
+Build support has been improved for cross-compiling in general and for
+Android in particular.
-=back
+=item Solaris
-=head2 Platform-Specific Notes
+C<c99> options have been cleaned up, hints look for C<solstudio>
+as well as C<SUNWspro>, and support for native C<setenv> has been added.
-XXX List any changes for specific platforms. This could include configuration
-and compilation changes or changes in portability/compatibility. However,
-changes within modules for platforms should generally be listed in the
-L</Modules and Pragmata> section.
+=item VMS
-=over 4
+C<finite>, C<finitel>, and C<isfinite> detection has been added to
+C<configure.com>, environment handling has had some minor changes, and
+a fix for legacy feature checking status.
-=item XXX-some-platform
+=item Windows
-XXX
+C<%I64d> is now being used instead of C<%lld> for MinGW.
=back
happens, Perl needs to be told that the locale has changed. Use this function
to do so, before returning to Perl.
+=item *
+
+Added L<perlapi/grok_atou> as a safer replacement for atoi and strtol.
+
=back
=head1 Selected Bug Fixes
BEGIN redefined" warning on the next use of C<use>, or other C<BEGIN>
block. [perl #122107]
+=item *
+
+C<method { BLOCK } ARGS> syntax now correctly parses the arguments if they
+begin with an opening brace. [perl #46947]
+
+=item *
+
+External libraries and Perl may have different ideas of what the locale is.
+This is problematic when parsing version strings if the locale's numeric
+separator has been changed. Version parsing has been patched to ensure
+it handles the locales correctly. [perl #121930]
+
+=item *
+
+A bug has been fixed where zero-length assertions and code blocks inside of a
+regex could cause L<pos> to see an incorrect value. [perl #122460]
+
=back
=head1 Known Problems
=back
-=head1 Obituary
-
-XXX If any significant core contributor has died, we've added a short obituary
-here.
-
=head1 Acknowledgements
XXX Generate this with:
https://perl5.git.perl.org / perl5.git / blobdiff