Update Module::CoreList for 5.27.5

[perl5.git] / pod / perldelta.pod

=encoding utf8

=head1 NAME

perldelta - what is new for perl v5.27.5

=head1 DESCRIPTION

This document describes differences between the 5.27.4 release and the 5.27.5
release.

If you are upgrading from an earlier release such as 5.27.3, first read
L<perl5274delta>, which describes differences between 5.27.3 and 5.27.4.

=head1 Performance Enhancements

=over 4

=item *

Calls to C<require> for an already loaded module are now slightly faster.
L<[perl #132171]|https://rt.perl.org/Public/Bug/Display.html?id=132171>

=back

=head1 Modules and Pragmata

=head2 Updated Modules and Pragmata

=over 4

=item *

L<arybase> has been upgraded from version 0.13 to 0.14.

=item *

L<B> has been upgraded from version 1.69 to 1.70.

=item *

L<B::Concise> has been upgraded from version 1.001 to 1.002.

=item *

L<B::Deparse> has been upgraded from version 1.42 to 1.43.

=item *

L<Config::Perl::V> has been upgraded from version 0.28 to 0.29.

=item *

L<Digest::SHA> has been upgraded from version 5.96 to 5.98.

=item *

L<Encode> has been upgraded from version 2.92 to 2.93.

=item *

L<encoding> has been upgraded from version 2.20 to 2.21.

=item *

L<File::Fetch> has been upgraded from version 0.52 to 0.54.

=item *

L<File::Path> has been upgraded from version 2.14 to 2.15.

=item *

L<List::Util> has been upgraded from version 1.48 to 1.49.

=item *

L<Locale::Codes> has been upgraded from version 3.52 to 3.54.

=item *

L<Math::BigInt> has been upgraded from version 1.999806 to 1.999811.

=item *

L<Math::BigInt::FastCalc> has been upgraded from version 0.5005 to 0.5006.

=item *

L<Module::CoreList> has been upgraded from version 5.20170920 to 5.20171020.

=item *

L<NEXT> has been upgraded from version 0.67 to 0.67_01.

=item *

L<Pod::Perldoc> has been upgraded from version 3.28 to 3.2801.

=item *

L<POSIX> has been upgraded from version 1.77 to 1.78.

=item *

L<Scalar::Util> has been upgraded from version 1.48 to 1.49.

=item *

L<Sub::Util> has been upgraded from version 1.48 to 1.49.

=item *

L<Sys::Hostname> has been upgraded from version 1.20 to 1.21.

=item *

L<Test::Simple> has been upgraded from version 1.302073 to 1.302103.

=item *

L<Time::HiRes> has been upgraded from version 1.9743 to 1.9746.

=item *

L<Time::Piece> has been upgraded from version 1.3201 to 1.3202.

=back

=head1 Platform Support

=head2 Platform-Specific Notes

=over 4

=item CentOS

Compilation on CentOS 5 is now fixed.

=back

=head1 Selected Bug Fixes

=over 4

=item *

Calling L<exec PROGRAM LIST|perlfunc/exec PROGRAM LIST> with an empty C<LIST>
has been fixed.  This should call C<execvp()> with an empty C<argv> array
(containing only the terminating C<NULL> pointer), but was instead just
returning false (and not setting L<C<$!>|perlvar/$!>).
L<[perl #131730]|https://rt.perl.org/Public/Bug/Display.html?id=131730>

=item *

The C<gv_fetchmeth_sv> C function stopped working properly in Perl 5.22 when
fetching a constant with a UTF-8 name if that constant subroutine was stored in
the stash as a simple scalar reference, rather than a full typeglob.  This has
been corrected.

=item *

Single-letter debugger commands followed by an argument which starts with
punctuation  (e.g. C<p$^V> and C<x@ARGV>) now work again.  They had been
wrongly requiring a space between the command and the argument.
L<[perl #120174]|https://rt.perl.org/Public/Bug/Display.html?id=120174>

=item *

L<splice|perlfunc/splice ARRAY,OFFSET,LENGTH,LIST> now throws an exception
("Modification of a read-only value attempted") when modifying a read-only
array.  Until now it had been silently modifying the array.  The new behaviour
is consistent with the behaviour of L<push|perlfunc/push ARRAY,LIST> and
L<unshift|perlfunc/unshift ARRAY,LIST>.
L<[perl #131000]|https://rt.perl.org/Public/Bug/Display.html?id=131000>

=back

=head1 Acknowledgements

XXX Generate this with:

  perl Porting/acknowledgements.pl v5.25.5..HEAD

=head1 Reporting Bugs

If you find what you think is a bug, you might check the perl bug database
at L<https://rt.perl.org/> .  There may also be information at
L<http://www.perl.org/> , the Perl Home Page.

If you believe you have an unreported bug, please run the L<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 C<perl -V>,
will be sent off to perlbug@perl.org to be analysed by the Perl porting team.

If the bug you are reporting has security implications which make it
inappropriate to send to a publicly archived mailing list, then see
L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
for details of how to report the issue.

=head1 Give Thanks

If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
you can do so by running the C<perlthanks> program:

    perlthanks

This will send an email to the Perl 5 Porters list with your show of thanks.

=head1 SEE ALSO

The F<Changes> file for an explanation of how to view exhaustive details on
what changed.

The F<INSTALL> file for how to build Perl.

The F<README> file for general stuff.

The F<Artistic> and F<Copying> files for copyright information.

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