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-=encoding utf8
-
-=head1 NAME
-
-perl5137delta - what is new for perl v5.13.7
-
-=head1 DESCRIPTION
-
-This document describes differences between the 5.13.6 release and
-the 5.13.7 release.
-
-If you are upgrading from an earlier release such as 5.13.5, first read
-L<perl5136delta>, which describes differences between 5.13.5 and
-5.13.6.
-
-=head1 Core Enhancements
-
-=head2 Single term prototype
-
-The C<+> prototype is a special alternative to C<$> that will act like
-C<\[@%]> when given a literal array or hash variable, but will otherwise
-force scalar context on the argument. This is useful for functions which
-should accept either a literal array or an array reference as the argument:
-
- sub smartpush (+@) {
- my $aref = shift;
- die "Not an array or arrayref" unless ref $aref eq 'ARRAY';
- push @$aref, @_;
- }
-
-When using the C<+> prototype, your function must check that the argument
-is of an acceptable type.
-
-=head2 C<use re '/flags';>
-
-The C<re> pragma now has the ability to turn on regular expression flags
-till the end of the lexical scope:
-
- use re '/x';
- "foo" =~ / (.+) /; # /x implied
-
-See L<re/"'/flags' mode"> for details.
-
-=head2 Statement labels can appear in more places
-
-Statement labels can now occur before any type of statement or declaration,
-such as C<package>.
-
-=head2 C<use feature "unicode_strings"> now applies to more regex matching
-
-Another chunk of the L<perlunicode/The "Unicode Bug"> is fixed in this
-release. Now, regular expressions compiled within the scope of the
-"unicode_strings" feature (or under the "u" regex modifier (specifiable
-currently only with infix notation C<(?u:...)> or via C<use re '/u'>)
-will match the same whether or not the target string is encoded in utf8,
-with regard to C<[[:posix:]]> character classes
-
-Work is underway to add the case sensitive matching to the control of
-this feature, but was not complete in time for this dot release.
-
-=head2 Array and hash container functions accept references
-
-All built-in functions that operate directly on array or hash
-containers now also accept hard references to arrays or hashes:
-
- |----------------------------+---------------------------|
- | Traditional syntax | Terse syntax |
- |----------------------------+---------------------------|
- | push @$arrayref, @stuff | push $arrayref, @stuff |
- | unshift @$arrayref, @stuff | unshift $arrayref, @stuff |
- | pop @$arrayref | pop $arrayref |
- | shift @$arrayref | shift $arrayref |
- | splice @$arrayref, 0, 2 | splice $arrayref, 0, 2 |
- | keys %$hashref | keys $hashref |
- | keys @$arrayref | keys $arrayref |
- | values %$hashref | values $hashref |
- | values @$arrayref | values $arrayref |
- | ($k,$v) = each %$hashref | ($k,$v) = each $hashref |
- | ($k,$v) = each @$arrayref | ($k,$v) = each $arrayref |
- |----------------------------+---------------------------|
-
-This allows these built-in functions to act on long dereferencing chains
-or on the return value of subroutines without needing to wrap them in
-C<@{}> or C<%{}>:
-
- push @{$obj->tags}, $new_tag; # old way
- push $obj->tags, $new_tag; # new way
-
- for ( keys %{$hoh->{genres}{artists}} ) {...} # old way
- for ( keys $hoh->{genres}{artists} ) {...} # new way
-
-For C<push>, C<unshift> and C<splice>, the reference will auto-vivify
-if it is not defined, just as if it were wrapped with C<@{}>.
-
-Calling C<keys> or C<values> directly on a reference gives a substantial
-performance improvement over explicit dereferencing.
-
-For C<keys>, C<values>, C<each>, when overloaded dereferencing is
-present, the overloaded dereference is used instead of dereferencing the
-underlying reftype. Warnings are issued about assumptions made in the
-following three ambiguous cases:
-
- (a) If both %{} and @{} overloading exists, %{} is used
- (b) If %{} overloading exists on a blessed arrayref, %{} is used
- (c) If @{} overloading exists on a blessed hashref, @{} is used
-
-=head2 y///r
-
-The C</r> flag, which was added to C<s///> in 5.13.2, has been extended to
-the C<y///> operator.
-
-It causes it to perform the substitution on a I<copy> of its operand,
-returning that copy instead of a character count.
-
-=head2 New global variable C<${^GLOBAL_PHASE}>
-
-A new global variable, C<${^GLOBAL_PHASE}>, has been added to allow
-introspection of the current phase of the perl interpreter. It's explained in
-detail in L<perlvar/"${^GLOBAL_PHASE}"> and
-L<perlmod/"BEGIN, UNITCHECK, CHECK, INIT and END">.
-
-=head2 Unicode Version 6.0 is now supported (mostly)
-
-Perl comes with the Unicode 6.0 data base updated with
-L<Corrigendum #8|http://www.unicode.org/versions/corrigendum8.html>,
-with one exception noted below.
-See L<http://unicode.org/versions/Unicode6.0.0> for details on the new
-release. Perl does not support any Unicode provisional properties,
-including the new ones for this release, but their database files are
-packaged with Perl.
-
-Unicode 6.0 has chosen to use the name C<BELL> for the character at U+1F514,
-which is a symbol that looks like a bell, and used in Japanese cell
-phones. This conflicts with the long-standing Perl usage of having
-C<BELL> mean the ASCII C<BEL> character, U+0007. In Perl 5.14,
-C<\N{BELL}> will continue to mean U+0007, but its use will generate a
-deprecated warning message, unless such warnings are turned off. The
-new name for U+0007 in Perl will be C<ALERT>, which corresponds nicely
-with the existing shorthand sequence for it, C<"\a">. C<\N{BEL}> will
-mean U+0007, with no warning given. The character at U+1F514 will not
-have a name in 5.14, but can be referred to by C<\N{U+1F514}>. The plan
-is that in Perl 5.16, C<\N{BELL}> will refer to U+1F514, and so all code
-that uses C<\N{BELL}> should convert by then to using C<\N{ALERT}>,
-C<\N{BEL}>, or C<"\a"> instead.
-
-=head2 Improved support for custom OPs
-
-Custom ops can now be registered with the new C<custom_op_register> C
-function and the C<XOP> structure. This will make it easier to add new
-properties of custom ops in the future. Two new properties have been added
-already, C<xop_class> and C<xop_peep>.
-
-C<xop_class> is one of the OA_*OP constants, and allows L<B> and other
-introspection mechanisms to work with custom ops that aren't BASEOPs.
-C<xop_peep> is a pointer to a function that will be called for ops of this
-type from C<Perl_rpeep>.
-
-See L<perlguts/Custom Operators> and L<perlapi/Custom Operators> for more
-detail.
-
-The old C<PL_custom_op_names>/C<PL_custom_op_descs> interface is still
-supported but discouraged.
-
-=head1 Incompatible Changes
-
-=head2 Dereferencing typeglobs
-
-If you assign a typeglob to a scalar variable:
-
- $glob = *foo;
-
-the glob that is copied to C<$glob> is marked with a special flag
-indicating that the glob is just a copy. This allows subsequent assignments
-to C<$glob> to overwrite the glob. The original glob, however, is
-immutable.
-
-Many Perl operators did not distinguish between these two types of globs.
-This would result in strange behaviour in edge cases: C<untie $scalar>
-would do nothing if the last thing assigned to the scalar was a glob
-(because it treated it as C<untie *$scalar>, which unties a handle).
-Assignment to a glob slot (e.g., C<(*$glob) = \@some_array>) would simply
-assign C<\@some_array> to C<$glob>.
-
-To fix this, the C<*{}> operator (including the C<*foo> and C<*$foo> forms)
-has been modified to make a new immutable glob if its operand is a glob
-copy. Various operators that make a distinction between globs and scalars
-have been modified to treat only immutable globs as globs.
-
-This causes an incompatible change in code that assigns a glob to the
-return value of C<*{}> when that operator was passed a glob copy. Take the
-following code, for instance:
-
- $glob = *foo;
- *$glob = *bar;
-
-The C<*$glob> on the second line returns a new immutable glob. That new
-glob is made an alias to C<*bar>. Then it is discarded. So the second
-assignment has no effect.
-
-It also means that C<tie $handle> will now tie C<$handle> as a scalar, even
-if it has had a glob assigned to it.
-
-The upside to this incompatible change is that bugs
-L<[perl #77496]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77496>,
-L<[perl #77502]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77502>,
-L<[perl #77508]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77508>,
-L<[perl #77688]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77688>,
-and
-L<[perl #77812]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77812>,
-and maybe others, too, have been fixed.
-
-See L<http://rt.perl.org/rt3/Public/Bug/Display.html?id=77810> for even
-more detail.
-
-=head2 Clearing stashes
-
-Stash list assignment C<%foo:: = ()> used to make the stash anonymous
-temporarily while it was being emptied. Consequently, any of its
-subroutines referenced elsewhere would become anonymous (showing up as
-"(unknown)" in C<caller>). Now they retain their package names, such that
-C<caller> will return the original sub name if there is still a reference
-to its typeglob, or "foo::__ANON__" otherwise
-L<[perl #79208]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=79208>.
-
-=head1 Deprecations
-
-=head2 C<\N{BELL}> is deprecated
-
-This is because Unicode is using that name for a different character.
-See L</Unicode Version 6.0 is now supported (mostly)> for more
-explanation.
-
-=head1 Performance Enhancements
-
-=over 4
-
-=item *
-
-When an object has many weak references to it, freeing that object
-can under some some circumstances take O(N^2) time to free (where N is the
-number of references). The number of circumstances has been reduced.
-L<[perl #75254]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=75254>.
-
-=back
-
-=head1 Modules and Pragmata
-
-=head2 New Modules and Pragmata
-
-=over 4
-
-=item *
-
-The following modules were added by the C<Unicode::Collate>
-upgrade from 0.63 to 0.67. See below for details.
-
-C<Unicode::Collate::CJK::Big5>
-
-C<Unicode::Collate::CJK::GB2312>
-
-C<Unicode::Collate::CJK::JISX0208>
-
-C<Unicode::Collate::CJK::Korean>
-
-C<Unicode::Collate::CJK::Pinyin>
-
-C<Unicode::Collate::CJK::Stroke>
-
-=back
-
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-C<Archive::Extract> has been upgraded from 0.44 to 0.46
-
-Resolves an issue with NetBSD-current and its new unzip
-executable.
-
-=item *
-
-C<Archive::Tar> has been upgraded from 1.68 to 1.72
-
-This adds the ptargrep utility for using regular expressions against
-the contents of files in a tar archive.
-
-=item *
-
-C<B> has been upgraded from 1.24 to 1.26.
-
-It no longer crashes when taking apart a C<y///> containing characters
-outside the octet range or compiled in a C<use utf8> scope.
-
-The size of the shared object has been reduced by about 40%, with no
-reduction in functionality.
-
-=item *
-
-C<B::Deparse> has been upgraded from 0.99 to 1.01.
-
-It fixes deparsing of C<our> followed by a variable with funny characters
-(as permitted under the C<utf8> pragma)
-L<[perl #33752]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=33752>.
-
-=item *
-
-C<CGI> has been upgraded from 3.49 to 3.50
-
-This provides the following security fixes: the MIME boundary in
-multipart_init is now random and improvements to the handling of
-newlines embedded in header values.
-
-The documentation for param_fetch() has been corrected and clarified.
-
-=item *
-
-C<CPAN> has been upgraded from 1.94_61 to 1.94_62
-
-=item *
-
-C<CPANPLUS> has been upgraded from 0.9007 to 0.9010
-
-Fixes for the SQLite source engine and resolving of issues with the
-testsuite when run under local::lib and/or cpanminus
-
-=item *
-
-C<CPANPLUS::Dist::Build> has been upgraded from 0.48 to 0.50
-
-=item *
-
-C<Data::Dumper> has been upgraded from 2.129 to 2.130_01.
-
-=item *
-
-C<DynaLoader> has been upgraded from 1.10 to 1.11.
-
-It fixes a buffer overflow when passed a very long file name.
-
-=item *
-
-C<ExtUtils::Constant> has been upgraded from 0.22 to 0.23.
-
-The C<AUTOLOAD> helper code generated by C<ExtUtils::Constant::ProxySubs>
-can now C<croak> for missing constants, or generate a complete C<AUTOLOAD>
-subroutine in XS, allowing simplification of many modules that use it.
-(C<Fcntl>, C<File::Glob>, C<GDBM_File>, C<I18N::Langinfo>, C<POSIX>, C<Socket>)
-
-C<ExtUtils::Constant::ProxySubs> can now optionally push the names of all
-constants onto the package's C{@EXPORT_OK}. This has been used to replace
-less space-efficient code in C<B>, helping considerably shrink the size of its
-shared object.
-
-=item *
-
-C<Fcntl> has been upgraded from 1.09 to 1.10.
-
-=item *
-
-C<File::Fetch> has been upgraded from 0.24 to 0.28
-
-C<HTTP::Lite> is now supported for 'http' scheme.
-
-The C<fetch> utility is supported on FreeBSD, NetBSD and
-Dragonfly BSD for the C<http> and C<ftp> schemes.
-
-=item *
-
-C<File::Glob> has been upgraded from 1.09 to 1.10.
-
-=item *
-
-C<File::stat> has been upgraded from 1.03 to 1.04.
-
-The C<-x> and C<-X> file test operators now work correctly under the root
-user.
-
-=item *
-
-C<GDBM_File> has been upgraded from 1.11 to 1.12.
-
-This fixes a memory leak when DBM filters are used.
-
-=item *
-
-C<Hash::Util> has been upgraded from 0.09 to 0.10.
-
-=item *
-
-C<Hash::Util::FieldHash> has been upgraded from 1.05 to 1.06.
-
-=item *
-
-C<I18N::Langinfo> has been upgraded from 0.06 to 0.07.
-
-=item *
-
-C<Locale::Maketext> has been upgraded from 1.16 to 1.17.
-
-=item *
-
-C<Math::BigInt> has been upgraded from 1.97 to 1.99_01.
-
-=item *
-
-C<Math::BigRat> has been upgraded from 0.26 to 0.26_01
-
-=item *
-
-C<Math::BigInt::FastCalc> has been upgraded from 0.22 to 0.24_01.
-
-=item *
-
-C<MIME::Base64> has been upgraded from 3.09 to 3.10
-
-Includes new functions to calculate the length of encoded and decoded
-base64 strings.
-
-=item *
-
-C<mro> has been upgraded from 1.04 to 1.05.
-
-=item *
-
-C<NDBM_File> has been upgraded from 1.09 to 1.10.
-
-This fixes a memory leak when DBM filters are used.
-
-=item *
-
-C<ODBM_File> has been upgraded from 1.08 to 1.09.
-
-This fixes a memory leak when DBM filters are used.
-
-=item *
-
-C<Opcode> has been upgraded from 1.16 to 1.17.
-
-=item *
-
-C<parent> has been upgraded from 0.223 to 0.224
-
-=item *
-
-C<Pod::Simple> has been upgraded from 3.14 to 3.15
-
-Includes various fixes to C<HTML> and C<XHTML> handling.
-
-=item *
-
-C<POSIX> has been upgraded from 1.21 to 1.22.
-
-=item *
-
-C<re> has been upgraded from 0.13 to 0.14, for the sake of the new
-C<use re "/flags"> pragma.
-
-=item *
-
-C<Safe> has been upgraded from 2.28 to 2.29.
-
-It adds C<&version::vxs::VCMP> to the default share.
-
-=item *
-
-C<SDBM_File> has been upgraded from 1.07 to 1.08.
-
-=item *
-
-C<SelfLoader> has been upgraded from 1.17 to 1.18.
-
-It now works in taint mode
-L<[perl #72062]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=72062>.
-
-=item *
-
-C<Socket> has been upgraded from 1.90 to 1.91.
-
-=item *
-
-C<Storable> has been upgraded from 2.22 to 2.24
-
-Includes performance improvement for overloaded classes.
-
-=item *
-
-C<Sys::Hostname> has been upgraded from 1.13 to 1.14.
-
-=item *
-
-C<Unicode::Collate> has been upgraded from 0.63 to 0.67
-
-This release newly adds locales C<ja> C<ko> and C<zh> and its variants
-( C<zh__big5han>, C<zh__gb2312han>, C<zh__pinyin>, C<zh__stroke> ).
-
-Supported UCA_Version 22 for Unicode 6.0.0.
-
-The following modules have been added:
-
-C<Unicode::Collate::CJK::Big5> for C<zh__big5han> which makes
-tailoring of CJK Unified Ideographs in the order of CLDR's big5han ordering.
-
-C<Unicode::Collate::CJK::GB2312> for C<zh__gb2312han> which makes
-tailoring of CJK Unified Ideographs in the order of CLDR's gb2312han ordering.
-
-C<Unicode::Collate::CJK::JISX0208> which makes tailoring of 6355 kanji
-(CJK Unified Ideographs) in the JIS X 0208 order.
-
-C<Unicode::Collate::CJK::Korean> which makes tailoring of CJK Unified Ideographs
-in the order of CLDR's Korean ordering.
-
-C<Unicode::Collate::CJK::Pinyin> for C<zh__pinyin> which makes
-tailoring of CJK Unified Ideographs in the order of CLDR's pinyin ordering.
-
-C<Unicode::Collate::CJK::Stroke> for C<zh__stroke> which makes
-tailoring of CJK Unified Ideographs in the order of CLDR's stroke ordering.
-
-=back
-
-=head1 Documentation
-
-L<perlvar> reorders the variables and groups them by topic. Each variable
-introduced after Perl 5.000 notes the first version in which it is
-available. L<perlvar> also has a new section for deprecated variables to
-note when they were removed.
-
-=head2 New Documentation
-
-=head3 L<perlpodstyle>
-
-New style guide for POD documentation,
-split mostly from the NOTES section of the pod2man man page.
-
-( This was added to C<v5.13.6> but was not documented with that release ).
-
-=head2 Changes to Existing Documentation
-
-=over
-
-=item *
-
-Array and hash slices in scalar context are now documented in L<perldata>.
-
-=item *
-
-L<perlform> and L<perllocale> have been corrected to state that
-C<use locale> affects formats.
-
-=back
-
-=head1 Diagnostics
-
-=head2 New Diagnostics
-
-=over 4
-
-=item *
-
-"Using !~ with %s doesn't make sense": This message was actually added in
-5.13.2, but was omitted from perldelta. It now applies also to the C<y///>
-operator, and has been documented.
-
-=back
-
-=head1 Utility Changes
-
-=head3 L<ptargrep>
-
-=over 4
-
-=item *
-
-L<ptargrep> is a utility to apply pattern matching to the contents of files
-in a tar archive. It comes with C<Archive::Tar>.
-
-=back
-
-=head1 Testing
-
-=over 4
-
-=item *
-
-The new F<t/mro/isa_aliases.t> has been added, which tests that
-C<*Foo::ISA = *Bar::ISA> works properly.
-
-=item *
-
-F<t/mro/isarev.t> has been added, which tests that C<PL_isarev> (accessible
-at the Perl level via C<mro::get_isarev>) is updated properly.
-
-=item *
-
-F<t/run/switchd-78586.t> has been added, which tests that
-L<[perl #78586]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78586>
-has been fixed (related to line numbers in the debugger).
-
-=back
-
-=head1 Platform Support
-
-=head2 Platform-Specific Notes
-
-=over 4
-
-=item Windows
-
-Directory handles are now properly cloned when threads are created. In perl
-5.13.6, child threads simply stopped inheriting directory handles. In
-previous versions, threads would share handles, resulting in crashes.
-
-Support for building with Visual C++ 2010 is now underway, but is not yet
-complete. See F<README.win32> for more details.
-
-=item VMS
-
-Record-oriented files (record format variable or variable with fixed control)
-opened for write by the perlio layer will now be line buffered to prevent the
-introduction of spurious line breaks whenever the perlio buffer fills up.
-
-=back
-
-=head1 Internal Changes
-
-=over 4
-
-=item *
-
-C<lex_start> has been added to the API, but is considered experimental.
-
-=item *
-
-A new C<parse_block> function has been added to the API
-L<[perl #78222]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78222>.
-
-=item *
-
-A new, experimental API has been added for accessing the internal
-structure that Perl uses for C<%^H>. See the functions beginning with
-C<cophh_> in L<perlapi>.
-
-=item *
-
-A stash can now have a list of effective names in addition to its usual
-name. The first effective name can be accessed via the C<HvENAME> macro,
-which is now the recommended name to use in MRO linearisations (C<HvNAME>
-being a fallback if there is no C<HvENAME>).
-
-These names are added and deleted via C<hv_ename_add> and
-C<hv_ename_delete>. These two functions are I<not> part of the API.
-
-=item *
-
-The way the parser handles labels has been cleaned up and refactored. As a
-result, the C<newFOROP()> constructor function no longer takes a parameter
-stating what label is to go in the state op.
-
-=item *
-
-The C<newWHILEOP()> and C<newFOROP()> functions no longer accept a line
-number as a parameter.
-
-=item *
-
-A new C<parse_barestmt()> function has been added, for parsing a statement
-without a label.
-
-=item *
-
-A new C<parse_label()> function has been added, that parses a statement
-label, separate from statements.
-
-=item *
-
-The C<CvSTASH()> macro can now only be used as an rvalue. C<CvSTASH_set()>
-has been added to replace assignment to C<CvSTASH()>. This is to ensure
-that backreferences are handled properly. These macros are not part of the
-API.
-
-=item *
-
-The C<op_scope()> and C<op_lvalue()> functions have been added to the API,
-but are considered experimental.
-
-=back
-
-=head1 Selected Bug Fixes
-
-=over 4
-
-=item *
-
-The C<parse_stmt> C function added in earlier in the 5.13.x series has been
-fixed to work with statements ending with C<}>
-L<[perl #78222]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78222>.
-
-=item *
-
-The C<parse_fullstmt> C function added in 5.13.5 has been fixed to work
-when called while an expression is being parsed.
-
-=item *
-
-Characters in the Latin-1 non-ASCII range (0x80 to 0xFF) used not to match
-themselves if the string happened to be UTF8-encoded internally, the
-regular expression was not, and the character in the regular expression was
-inside a repeated group (e.g.,
-C<Encode::decode_utf8("\303\200") =~ /(\xc0)+/>)
-L<[perl #78464]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78464>.
-
-=item *
-
-The C<(?d)> regular expression construct now overrides a previous C<(?u)>
-or C<use feature "unicode_string">
-L<[perl #78508]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78508>.
-
-=item *
-
-A memory leak in C<do "file">, introduced in perl 5.13.6, has been fixed
-L<[perl #78488]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78488>.
-
-=item *
-
-Various bugs related to typeglob dereferencing have been fixed. See
-L</Dereferencing typeglobs>, above.
-
-=item *
-
-The C<SvPVbyte> function available to XS modules now calls magic before
-downgrading the SV, to avoid warnings about wide characters
-L<[perl #72398]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=72398>.
-
-=item *
-
-The C<=> operator used to ignore magic (e.g., tie methods) on its
-right-hand side if the scalar happened to hold a typeglob. This could
-happen if a typeglob was the last thing returned from or assigned to a tied
-scalar
-L<[perl #77498]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77498>.
-
-=item *
-
-C<sprintf> was ignoring locales when called with constant arguments
-L<[perl #78632]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78632>.
-
-=item *
-
-A non-ASCII character in the Latin-1 range could match both a Posix
-class, such as C<[[:alnum:]]>, and its inverse C<[[:^alnum:]]>. This is
-now fixed for regular expressions compiled under the C<"u"> modifier.
-See L</C<use feature "unicode_strings"> now applies to more regex matching>.
-L<[perl #18281]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=18281>.
-
-=item *
-
-Concatenating long strings under C<use encoding> no longer causes perl to
-crash
-L<[perl #78674]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78674>.
-
-=item *
-
-Typeglob assignments would crash if the glob's stash no longer existed, so
-long as the glob assigned to was named 'ISA' or the glob on either side of
-the assignment contained a subroutine.
-
-=item *
-
-Calling C<< ->import >> on a class lacking an import method could corrupt
-the stack, resulting in strange behaviour. For instance,
-
- push @a, "foo", $b = bar->import;
-
-would assign 'foo' to C<$b>
-L<[perl #63790]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=63790>.
-
-=item *
-
-Creating an alias to a package when that package had been detached from the
-symbol table would result in corrupted isa caches
-L<[perl #77358]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77358>.
-
-=item *
-
-C<.=> followed by C<< <> >> or C<readline> would leak memory if C<$/>
-contained characters beyond the octet range and the scalar assigned to
-happened to be encoded as UTF8 internally
-L<[perl #72246]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=72246>.
-
-=item *
-
-The C<recv> function could crash when called with the MSG_TRUNC flag
-L<[perl #75082]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=75082>.
-
-=item *
-
-Evaluating a simple glob (like C<*a>) was calling get-magic on the glob,
-even when its contents were not being used
-L<[perl #78580]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78580>.
-
-This bug was introduced in 5.13.2 and did not affect earlier perl versions.
-
-=item *
-
-Matching a Unicode character against an alternation containing characters
-that happened to match continuation bytes in the former's UTF8
-representation (C<qq{\x{30ab}} =~ /\xab|\xa9/>) would cause erroneous
-warnings
-L<[perl #70998]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=70998>.
-
-=item *
-
-C<s///r> (added in 5.13.2) no longer leaks.
-
-=item *
-
-The trie optimisation was not taking empty groups into account, preventing
-'foo' from matching C</\A(?:(?:)foo|bar|zot)\z/>
-L<[perl #78356]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78356>.
-
-=item *
-
-A pattern containing a C<+> inside a lookahead would sometimes cause an
-incorrect match failure in a global match (e.g., C</(?=(\S+))/g>)
-L<[perl #68564]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=68564>.
-
-=item *
-
-Iterating with C<foreach> over an array returned by an lvalue sub now works
-L<[perl #23790]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=23790>.
-
-=item *
-
-C<$@> is now localised during calls to C<binmode> to prevent action at a
-distance
-L<[perl #78844]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=78844>.
-
-=item *
-
-C<PL_isarev>, which is accessible to Perl via C<mro::get_isarev> is now
-updated properly when packages are deleted or removed from the C<@ISA> of
-other classes. This allows many packages to be created and deleted without
-causing a memory leak
-L<[perl #75176]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=75176>.
-
-=item *
-
-C<undef *Foo::> and C<undef *Foo::ISA> and C<delete $package::{ISA}>
-used not to update the internal isa caches if the
-stash or C<@ISA> array had a reference elsewhere. In
-fact, C<undef *Foo::ISA> would stop a new C<@Foo::ISA> array from updating
-caches.
-
-=item *
-
-C<@ISA> arrays can now be shared between classes via
-C<*Foo::ISA = \@Bar::ISA> or C<*Foo::ISA = *Bar::ISA>
-L<[perl #77238]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=77238>.
-
-=item *
-
-The parser no longer hangs when encountering certain Unicode characters,
-such as U+387
-L<[perl #74022]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=74022>.
-
-=item *
-
-C<formline> no longer crashes when passed a tainted format picture. It also
-taints C<$^A> now if its arguments are tainted
-L<[perl #79138]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=79138>.
-
-=item *
-
-A signal handler called within a signal handler could cause leaks or
-double-frees. Now fixed.
-L<[perl #76248]|http://rt.perl.org/rt3/Public/Bug/Display.html?id=76248>.
-
-=item *
-
-When trying to report C<Use of uninitialized value $Foo::BAR>, crashes could
-occur if the GLOB of the global variable causing the warning has been detached
-from its original stash by, for example C<delete $::{'Foo::'}>. This has been
-fixed by disabling the reporting of variable names in the warning in those
-cases.
-
-=back
-
-=head1 Obituary
-
-Randy Kobes, creator of the kobesearch alternative to search.cpan.org and
-contributor/maintainer to several core Perl toolchain modules, passed away
-on September 18, 2010 after a battle with lung cancer. His contributions
-to the Perl community will be missed.
-
-=head1 Acknowledgements
-
-Perl 5.13.7 represents approximately one month of development since Perl 5.13.6
-and contains 73100 lines of changes across 518 files from 39 authors and committers:
-
-Abhijit Menon-Sen, Abigail, Ben Morrow, Chas. J. Owens IV, Chris 'BinGOs' Williams, Craig A. Berry,
-David Golden, David Mitchell, Father Chrysostomos, Fingle Nark, Florian Ragwitz, George Greer,
-Grant McLean, H.Merijn Brand, Ian Goodacre, Jan Dubois, Jerry D. Hedden, Jesse Vincent, Karl Williamson,
-Lubomir Rintel, Marty Pauley, Moritz Lenz, Nicholas Clark, Nicolas Kaiser, Niko Tyni, Peter John Acklam,
-Rafael Garcia-Suarez, Shlomi Fish, Steffen Mueller, Steve Hay, Tatsuhiko Miyagawa, Tim Bunce, Todd Rinaldo,
-Tom Christiansen, Tom Hukins, Tony Cook, Yves Orton, Zefram and brian d foy
-
-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.
-
-=head1 Reporting Bugs
-
-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 http://rt.perl.org/perlbug/ . There may also be
-information at http://www.perl.org/ , the Perl Home Page.
-
-If you believe you have an unreported bug, please run the B<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 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 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.
-
-=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.
-
-=cut