[ this is a template for a new perldelta file. Any text flagged as
XXX needs to be processed before release. ]
-perldelta - what is new for perl v5.15.0
-
-=for comment
-This has been completed up to 571f0e8.
+perldelta - what is new for perl v5.15.2
=head1 DESCRIPTION
-This document describes differences between the 5.15.0 release and
-the 5.14.0 release.
-
-If you are upgrading from an earlier release such as 5.YYY.YYY, first read
-L<perl5YYYdelta>, which describes differences between 5.ZZZ.ZZZ and
-5.YYY.YYY.
+This document describes differences between the 5.15.1 release and
+the 5.15.2 release.
-Some of the changes have been included in Perl 5.14.1. These are
-indicated with a "(5.14.1)" marker.
-
-XXX compare this perldelta to 5.14.1 and double check the notation
+If you are upgrading from an earlier release such as 5.15.0, first read
+L<perl5151delta>, which describes differences between 5.15.0 and
+5.15.1.
=head1 Notice
[ List each enhancement as a =head2 entry ]
-=head2 C<CORE::> works on all keywords
-
-The C<CORE::> prefix can now be used on keywords enabled by
-L<feature.pm|feature>, even outside the scope of C<use feature>.
-
-=head2 C<continue> no longer requires the "switch" feature
-
-The C<continue> keyword has two meanings. It can introduce a C<continue>
-block after a loop, or it can exit the current C<when> block. Up till now,
-the latter meaning was only valid with the "switch" feature enabled, and
-was a syntax error otherwise. Since the main purpose of feature.pm is to
-avoid conflicts with user-defined subroutines, there is no reason for
-C<continue> to depend on it.
-
-=head2 C<$$> can be assigned to
-
-C<$$> was made read-only in Perl 5.8.0. But only sometimes: C<local $$>
-would make it writable again. Some CPAN modules were using C<local $$> or
-XS code to bypass the read-only check, so there is no reason to keep C<$$>
-read-only. (This change also allowed a bug to be fixed while maintaining
-backward compatibility.)
-
-=head2 Features inside the debugger
-
-The current Perl's feature bundle is now enabled for commands entered in
-the interactive debugger.
-
=head1 Security
XXX Any security-related notices go here. In particular, any security
=head1 Incompatible Changes
-[ List each incompatible change as a =head2 entry ]
+XXX For a release on a stable branch, this section aspires to be:
-=head2 Tying scalars that hold typeglobs
+ There are no changes intentionally incompatible with 5.XXX.XXX
+ If any exist, they are bugs and reports are welcome.
-Attempting to tie a scalar after a typeglob was assigned to it would
-instead tie the handle in the typeglob's IO slot. This meant that it was
-impossible to tie the scalar itself. Similar problems affected C<tied> and
-C<untie>: C<tied $scalar> would return false on a tied scalar if the last
-thing returned was a typeglob, and C<untie $scalar> on such a tied scalar
-would do nothing.
-
-We fixed this problem before Perl 5.14.0, but it caused problems with some
-CPAN modules, so we put in a deprecation cycle instead.
-
-Now the deprecation has been removed and this bug has been fixed. So
-C<tie $scalar> will always tie the scalar, not the handle it holds. To tie
-the handle, use C<tie *$scalar> (with an explicit asterisk). The same
-applies to C<tied *$scalar> and C<untie *$scalar>.
+[ List each incompatible change as a =head2 entry ]
=head1 Deprecations
=item *
-L<constant> has been updated from version 1.21 to 1.22.
-
-=item *
-
-L<Archive::Extract> has been upgraded from version 0.48 to version 0.52
-
-Includes a fix for FreeBSD to only use C<unzip> if it is located in
-C</usr/local/bin>, as FreeBSD 9.0 will ship with a limited C<unzip> in
-C</usr/bin>.
-
-=item *
-
-L<Attribute::Handlers> updated from version 0.88 to 0.91
-
-=item *
-
-L<B> has been upgraded from version 1.29 to version 1.30.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.03 to 1.05.
-
-It addresses two regressions in Perl 5.14.0:
-
-=over
-
-=item *
-
-Deparsing of the C<glob> operator and its diamond (C<< <> >>) form now
-works again [RT #90898] (5.14.1).
-
-=item *
-
-The presence of subroutines named C<::::> or C<::::::> no longer causes
-B::Deparse to hang (5.14.1).
-
-=back
-
-Plus a few other bugs:
-
-=over
-
-=item *
-
-Deparsing of handle C<keys>, C<each> and C<value> with a scalar argument
-now works [RT #91008].
-
-=item *
-
-C<readpipe> followed by a complex expression (as opposed to a simple scalar
-variable) now works.
-
-=item *
-
-It now puts C<CORE::> in front of overridable core keywords if they
-conflict with user-defined subroutines.
+L<ExtUtils::Install> has been upgraded from version 1.56 to version 1.57.
-=item *
-
-Deparsing assignment to an lvalue method specified as a variable
-(C<< $obj->$method = ... >>) used not to work [RT #62498].
+There is no change to ExtUtils::Install other than the version number
+increase, but L<ExtUtils::Installed> has been upgraded from version 1.999_001
+to vesion 1.999002 and a new C<skip_cwd> attribute has been added.
=back
-=item *
-
-L<CGI> has been upgraded from version 3.52 to version 3.54
-
-The DELETE HTTP verb is now supported.
-
-=item *
-
-L<Compress::Zlib> has been upgraded from version 2.033 to version 2.035
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.033 to version 2.035
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.033 to version 2.035
-
-=item *
-
-L<CPAN::Meta> has been upgraded from version 2.110440 to version 2.110930
-
-=item *
-
-L<CPANPLUS> has been upgraded from version 0.9103 to version 0.9105
-
-Now understands specifying modules to install in the format 'Module/Type.pm'
-
-=item *
-
-L<CPANPLUS::Dist::Build> has been upgraded from version 0.54 to version 0.56
-
-=item *
-
-L<Data::Dumper> has been upgraded from version 2.128 to 2.131.
-
-=item *
-
-L<DB_File> has been upgraded from version 1.821 to version 1.822
-
-Warnings are now in sync with perl's
-
-=item *
-
-L<Digest::SHA> has been upgraded from version 5.61 to version 5.62
-
-No longer loads L<MIME::Base64> as this was unnecessary.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.07 to 1.08.
-
-Its C<fill_mstats> function no longer refuses to write to copy-on-write
-scalars.
-
-=item *
-
-L<Encode> has been upgraded from version 2.42 to version 2.43
-
-Missing aliases added, a deep recursion error fixed and various
-documentation updates.
-
-=item *
-
-L<ExtUtils::CBuilder> updated from version 0.280203 to 0.280204. The new version
-append CFLAGS and LDFLAGS to their Config.pm counterparts.
-
-=item *
-
-L<Filter::Util::Call> has been upgraded from version 1.08 to version 1.39
-
-C<decrypt> fixed to work with v5.14.0
-
-=item *
-
-L<Filter::Simple> updated from version 0.85 to 0.87
-
-=item *
-
-L<FindBin> updated from version 1.50 to 1.51.
-
-It no longer returns a wrong result if a script of the same name as the
-current one exists in the path and is executable.
-
-=item *
-
-L<JSON::PP> has been upgraded from version 2.27105 to version 2.27200
-
-Fixed C<incr_parse> decoding string more correctly.
-
-=item *
-
-L<I18N::LangTags> has been upgraded from version 0.35_01 to version 0.36.
-
-Fix broken URLs for RFCs.
-
-=item *
-
-L<IPC::Open3> has been upgraded from version 1.10 to version 1.11.
+=head2 Removed Modules and Pragmata
=over 4
=item *
-Fixes a bug which prevented use of open3 on Windows when *STDIN, *STDOUT or
-*STDERR had been localized.
-
-=item *
-
-Fixes a bug which prevented duplicating numeric file descriptors on Windows.
-
-=back
-
-=item *
-
-L<Math::BigFloat> has been upgraded from version 1.993 to 1.994.
-
-The C<numify> method has been corrected to return a normalised Perl number
-(the result of C<0 + $thing>), instead of a string [rt.cpan.org #66732].
-
-=item *
-
-L<Math::BigInt> has been upgraded from version 1.994 to 1.995.
-
-It provides a new C<bsgn> method that complements the C<babs> method.
-
-It fixes the internal C<objectify> function's handling of "foreign objects"
-so they are converted to the appropriate class (Math::BigInt or
-Math::BigFloat).
-
-=item *
-
-L<Math::Complex> has been upgraded from version 1.56 to version 1.57.
-
-Correct copy constructor usage.
-Fix polarwise formatting with numeric format specifier.
-More stable C<great_circle_direction> algorithm.
-
-=item *
-
-L<Module::CoreList> has been upgraded from version 2.49 to 2.50.
-
-Updated for v5.12.4.
-
-=item *
-
-L<mro> has been updated to remove two broken URLs in the documentation.
-
-=item *
-
-L<Object::Accessor> has been upgraded from version 0.38 to version 0.42
-
-Eliminated use of C<exists> on array elements which has been deprecated.
-
-=item *
-
-L<PerlIO::encoding> has been upgraded from version 0.14 to 0.15
-
-=item *
-
-L<PerlIO::scalar> has been upgraded from version 0.11 to 0.12.
-
-It fixes a problem with C<< open my $fh, ">", \$scalar >> not working if
-C<$scalar> is a copy-on-write scalar.
-
-It also fixes a hang that occurs with C<readline> or C<< <$fh> >> if a
-typeglob has been assigned to $scalar [RT #92258].
-
-=item *
-
-XXX If any changes are made, the version will need to be bumped again.
-What blead has is currently (as of a9d1f3db, 7th of June) identical to
-5.14.1's version.
-
-L<Pod::Perldoc> has been upgraded from version 3.15_03 to 3.15_04.
-
-It corrects the search paths on VMS [RT #90640].
-
-=item *
-
-L<Storable> has been upgraded from version 2.27 to version 2.28.
-
-It no longer turns copy-on-write scalars into read-only scalars when
-freezing and thawing.
-
-=item *
-
-L<Sys::Syslog> has been upgraded from version 0.27 to version 0.29
-
-Large number of Request Tickets resolved.
-
-=item *
-
-L<Time::HiRes> has been upgraded from version 1.9721_01 to version 1.9722.
-
-Portability fix, and avoiding some compiler warnings.
-
-=item *
-
-L<Unicode::Collate> has been upgraded from version 0.73 to version 0.76
-
-Updated to CLDR 1.9.1
-
-=item *
-
-L<Unicode::Normalize> has been upgraded from version 1.10 to version 1.12
-
-Fixes for the removal of C<unicore/CompositionExclusions.txt> from core.
-
-=item *
-
-L<XSLoader> has been upgraded from version 0.13 to version 0.15
-
-Integrated changes from bleadperl
-
-=item *
-
XXX
=back
-=head2 Removed Modules and Pragmata
-
-As promised in Perl 5.14.0's release notes, the following modules have
-been removed from the core distribution, and if needed should be installed
-from CPAN instead.
-
-=over
-
-=item *
-
-L<Devel::DProf> has been removed from the Perl core. Prior version was 20110228.00.
-
-=back
-
=head1 Documentation
XXX Changes to files in F<pod/> go here. Consider grouping entries by
However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
section.
-=head3 L<perlfork>
-
-=over
-
-=item *
-
-Added portability caveats related to using kill on forked process.
-
-=back
-
-=head3 L<perlfunc>
-
-=over
-
-=item *
-
-C<given>, C<when> and C<default> are now listed in L<perlfunc> (5.14.1).
-
-=item *
-
-The examples for the C<select> function no longer use strings for file
-handles.
-
-=back
-
-=head3 L<perlguts>
-
-=over
-
-=item *
-
-Some of the function descriptions in L<perlguts> were confusing, as it was
-not clear whether they referred to the function above or below the
-description. This has been clarified [RT #91790].
-
-=back
-
-=head3 L<perllol>
-
-=over
-
-=item *
-
-L<perllol> has been expanded with examples using the new C<push $scalar>
-syntax introduced in Perl 5.14.0 (5.14.1).
-
-=back
-
-=head3 L<perlmod>
-
-=over
-
-=item *
-
-L<perlmod> now states explicitly that some types of explicit symbol table
-manipulation are not supported. This codifies what was effectively already
-the case [RT #78074].
-
-=back
-
-=head3 L<perlop>
-
-=over 4
-
-=item *
-
-The explanation of bitwise operators has been expanded to explain how they
-work on Unicode strings (5.14.1).
-
-=item *
-
-The section on the triple-dot or yada-yada operator has been moved up, as
-it used to separate two closely related sections about the comma operator
-(5.14.1).
-
-=item *
-
-More examples for C<m//g> have been added (5.14.1).
-
-=item *
-
-The C<<< <<\FOO >>> here-doc syntax has been documented (5.14.1).
-
-=back
-
-=head3 L<perlpodstyle>
+=head3 L<XXX>
=over 4
=item *
-The tips on which formatting codes to use have been corrected and greatly
-expanded.
-
-=item *
-
-There are now a couple of example one-liners for previewing POD files after
-they have been edited.
-
-=back
-
-=head3 L<perlre>
-
-=over
-
-=item *
-
-The C<(*COMMIT)> directive is now listed in the right section
-(L<Verbs without an argument|perlre/Verbs without an argument>).
+XXX Description of the change here
=back
-=head3 L<perlrun>
-
-=over
-
-=item *
+=head1 Diagnostics
-L<perlrun> has undergone a significant clean-up. Most notably, the
-B<-0x...> form of the B<-0> flag has been clarified, and the final section
-on environment variables has been corrected and expanded (5.14.1).
+The following additions or changes have been made to diagnostic output,
+including warnings and fatal error messages. For the complete list of
+diagnostic messages, see L<perldiag>.
-=back
+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.
-=head3 L<perlvar>
+[ Within each section, list entries as a =item entry that links to perldiag,
+ e.g.
-=over
+ =item *
-=item *
+ L<Invalid version object|perldiag/"Invalid version object">
+]
-The documentation for L<$!|perlvar/$!> has been corrected and clarified.
-It used to state that $! could be C<undef>, which is not the case. It was
-also unclear as to whether system calls set C's C<errno> or Perl's C<$!>
-[RT #91614].
+=head2 New Diagnostics
-=back
+XXX Newly added diagnostic messages go here
-=head3 L<POSIX>
+=head3 New Errors
-=over
+=over 4
=item *
-The invocation documentation for C<WIFEXITED>, C<WEXITSTATUS>,
-C<WIFSIGNALED>, C<WTERMSIG>, C<WIFSTOPPED>, and C<WSTOPSIG> has been
-corrected (5.14.1).
+XXX L<message|perldiag/"message">
=back
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-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.
-
-[ Within each section, list entries as a =item entry ]
-
-=head2 New Diagnostics
-
-XXX Newly added diagnostic messages go here
-
=head3 New Warnings
=over 4
-=item L<Useless assignment to a temporary|perldiag/"Useless assignment to a temporary">
+=item *
-Assigning to a temporary returned from an XS lvalue subroutine now produces a
-warning [RT #31946].
+XXX L<message|perldiag/"message">
=back
=item *
-XXX
+XXX Describe change here
=back
entries for each change
Use L<XXX> with program names to get proper documentation linking. ]
-=head3 L<XXX>
+=head3 L<perlivp>
=over 4
=item *
-XXX
+Fixed a bug whereby other perls under the current directory could cause
+false positive failures.
+
+=item *
+
+Tests for .ph files have been removed, as these test have been optional since
+2005 and .ph files are no longer generated during installation.
=back
=item *
-F<regexp.h> has been modified for compatibility with GCC's B<-Werror>
-option, as used by some projects that include perl's header files (5.14.1).
-
-=item *
-
-USE_LOCALE{,_COLLATE,_CTYPE,_NUMERIC} have been added the output of perl -V
-as they have affect the behaviour of the interpreter binary (albeit only
-in a small area).
+XXX
=back
=over 4
-=item GNU/Hurd
-
-=over
-
-=item *
-
-No longer overrides possible extra $ccflags values given to Configure
-on GNU/Hurd. C.f. Bug-Debian: http://bugs.debian.org/587901
-
-=back
-
-=item Mac OS X
-
-Clarified apple developer tools requirements in README.macosx
-
-=item MSWin32
-
-Supplied F<makefile.mk> patched to support gcc-4.x.x and README.win32
-updated accordingly. [RT #91354]
-
-=item Solaris
+=item XXX-some-platform
-Updated the list of required packages for building perl to reflect Solaris 9
-and 10 in README.solaris [RT #90850]
+XXX
=back
changes within modules for platforms should generally be listed in the
L</Modules and Pragmata> section.
-=head3 Ubuntu Linux
-
=over 4
-=item *
-
-The L<ODBM_File> installation process has been updated with the new library
-paths on Ubuntu natty [RT #90106].
-
-=item *
+=item XXX-some-platform
-I<h2ph> now gets the include paths from gcc correctly. This stopped
-working when Ubuntu switched to a "multiarch" setup [RT #90122].
+XXX
=back
Other significant internal changes for future core maintainers should
be noted as well.
-=over 4
-
-=item *
-
-When empting a hash of its elements (e.g. via undef(%h), or %h=()), HvARRAY
-field is no longer temporarily zeroed. Any destructors called on the freed
-elements see the remaining elements. Thus, %h=() becomes more like C<delete
-$h{$_} for keys %h>.
-
-=item *
-
-The compiled representation of formats is now stored via the mg_ptr of
-their PERL_MAGIC_fm. Previously it was stored in the string buffer,
-beyond SvLEN(), the regular end of the string. SvCOMPILED() and
-SvCOMPILED_{on,off}() now exist solely for compatibility for XS code.
-The first is always 0, the other two now no-ops.
-
-=item *
+[ List each change as a =item entry ]
-Boyer-Moore compiled scalars are now PVMGs, and the Boyer-Moore tables are now
-stored via the mg_ptr of their PERL_MAGIC_bm. Previously they were PVGVs, with
-the tables stored in the string buffer, beyond SvLEN(). This eliminates the
-last place where the core stores data beyond SvLEN().
+=over 4
=item *
-C<pos> in lvalue context now returns a PVMG instead of a PVLV, storing the
-target SV in C<mg_obj>, instead of C<LvTARG()>.
+XXX
=back
[ List each fix as a =item entry ]
-=head2 Regular expressions and character classes
-
=over 4
=item *
-The new (in 5.14.0) regular expression modifier C</a> when repeated like
-C</aa> forbids the characters outside the ASCII range that match
-characters inside that range from matching under C</i>. This did not
-work under some circumstances, all involving alternation, such as:
-
- "\N{KELVIN SIGN}" =~ /k|foo/iaa;
-
-succeeded inappropriately. This is now fixed.
-
-=item *
-
-5.14.0 introduced some memory leaks in regular expression character
-classes such as C<[\w\s]>, which have now been fixed
-
-=item *
-
-An edge case in regular expression matching could potentially loop.
-This happened only under C</i> in bracketed character classes that have
-characters with multi-character folds, and the target string to match
-against includes the first portion of the fold, followed by another
-character that has a multi-character fold that begins with the remaining
-portion of the fold, plus some more.
-
- "s\N{U+DF}" =~ /[\x{DF}foo]/i
-
-is one such case. C<\xDF> folds to C<"ss">
-
-=item *
-
-A few characters in regular expression pattern matches did not
-match correctly in some circumstances, all involving C</i>. The
-affected characters are:
-COMBINING GREEK YPOGEGRAMMENI,
-GREEK CAPITAL LETTER IOTA,
-GREEK CAPITAL LETTER UPSILON,
-GREEK PROSGEGRAMMENI,
-GREEK SMALL LETTER IOTA WITH DIALYTIKA AND OXIA,
-GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS,
-GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND OXIA,
-GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS,
-LATIN SMALL LETTER LONG S,
-LATIN SMALL LIGATURE LONG S T,
-and
-LATIN SMALL LIGATURE ST.
+Locking an lvalue subroutine (via C<lock &lvsub>) now locks the return
+value, instead of trying to lock the sub (which has no effect). It also no
+longer tries to return the sub as a scalar, resulting in strange side
+effects like C<ref \$_> returning "CODE" in some instances.
=item *
-Fixed memory leak regression in regular expression compilation
-under threading
+C<lock>'s prototype has been corrected to C<(\[$@%*])> from C<(\$)>, which
+was just wrong.
=back
-=head2 Formats
-
-=over
-
-=item *
-
-A number of edge cases have been fixed with formats and C<formline>;
-in particular, where the format itself is potentially variable (such as
-with ties and overloading), and where the format and data differ in their
-encoding. In both these cases, it used to possible for the output to be
-corrupted [RT #91032].
-
-=item *
-
-C<formline> no longer converts its argument into a string in-place. So
-passing a reference to C<formline> no longer destroys the reference
-[RT #79532].
-
-=back
-
-=head2 Copy-on-write scalars
-
-Copy-on-write scalars were introduced in 5.6.0, but most Perl code
-did not encounter them (they were used mostly internally). Perl
-5.10.0 extended them, such that assigning C<__PACKAGE__> or a
-hash key to a scalar would make it copy-on-write. Several parts
-of Perl were not updated to account for them, but have now been fixed.
-
-=over
-
-=item *
-
-C<utf8::decode> had a nasty bug that would modify copy-on-write scalars'
-string buffers in place (i.e., skipping the copy). This could result in
-hashes having two elements with the same key [RT #91834].
-
-=item *
-
-Lvalue subroutines were not allowing COW scalars to be returned. This was
-fixed for lvalue scalar context in Perl 5.12.3 and 5.14.0, but list context
-was not fixed until this release.
-
-=item *
-
-Elements of restricted hashes (see the L<fields> pragma) containing
-copy-on-write values couldn't be deleted, nor could such hashes be cleared
-(C<%hash = ()>).
-
-=item *
-
-Localising a tied variable used to make it read-only if it contained a
-copy-on-write string.
-
-=item *
-
-L<Storable>, L<Devel::Peek> and L<PerlIO::scalar> had similar problems.
-See L</Updated Modules and Pragmata>, above.
-
-=back
-
-=head2 lvalue subroutines
-
-There have been various fixes to lvalue subroutines.
-
-=over
-
-=item *
-
-Explicit return now returns the actual argument passed to return, instead
-of copying it [RT #72724] [RT #72706].
-
-B<Note:> There are still some discrepancies between explicit and implicit
-return, which will hopefully be resolved soon. So the exact behaviour is
-not set in stone yet.
-
-=item *
-
-Lvalue subroutines used to enforce lvalue syntax (i.e., whatever can go on
-the left-hand side of C<=>) for the last statement and the arguments to
-return. Since lvalue subroutines are not always called in lvalue context,
-this restriction has been lifted.
-
-=item *
-
-Lvalue subroutines are less restrictive as to what values can be returned.
-It used to croak on values returned by C<shift> and C<delete> and from
-other subroutines, but no longer does so [RT #71172].
-
-=item *
-
-Empty lvalue subroutines (C<sub :lvalue {}>) used to return C<@_> in list
-context. In fact, all subroutines used to, but regular subs were fixed in
-Perl 5.8.2. Now lvalue subroutines have been likewise fixed.
-
-=item *
-
-Lvalue subroutines used to copy their return values in rvalue context. Not
-only was this a waste of CPU cycles, but it also caused bugs. A C<($)>
-prototype would cause an lvalue sub to copy its return value [RT #51408],
-and C<while(lvalue_sub() =~ m/.../g) { ... }> would loop endlessly
-[RT #78680].
-
-=item *
-
-Autovivification now works on values returned from lvalue subroutines
-[RT #7946].
-
-=item *
-
-When called in pass-by-reference context (e.g., subroutine arguments or a list
-passed to C<for>), an lvalue subroutine returning arrays or hashes used to bind
-the arrays (or hashes) to scalar variables--something that is not supposed to
-happen. This could result in "Bizarre copy of ARRAY" errors or C<print>
-ignoring its arguments. It also made nonsensical code like C<@{\$_}> "work".
-This was fixed in 5.14.0 if an array were the first thing returned from the
-subroutine (but not for C<$scalar, @array> or hashes being returned). Now a
-more general fix has been applied [RT #23790].
-
-=item *
-
-Assignment to C<keys> returned from an lvalue sub used not to work, but now
-it does.
-
-=back
-
-=head2 Fixes related to hashes
-
-=over
-
-=item *
-
-A bug has been fixed that would cause a "Use of freed value in iteration"
-error if the next two hash elements that would be iterated over are
-deleted [RT #85026].
-
-=item *
-
-Freeing deeply nested hashes no longer crashes [RT #44225].
-
-=item *
-
-Deleting the current hash iterator (the hash element that would be returend
-by the next call to C<each>) in void context used not to free it. The hash
-would continue to reference it until the next iteration. This has been
-fixed [RT #85026].
-
-=back
-
-=head2 Other notable fixes
-
-=over
-
-=item *
-
-Previously, if one embeds Perl or uses XS and calls fork(3) from C, Perl's
-notion of C<$$> could go out of sync with what getpid() returns. By always
-fetching the value of C<$$> via getpid(), this potential bug is eliminated.
-
-=item *
-
-Passing the same constant subroutine to both C<index> and C<formline> no
-longer causes one or the other to fail [RT #89218].
-
-=item *
-
-List assignment to lexical variables declared with attributes in the same
-statement (C<my ($x,@y) : blimp = (72,94)>) stopped working in Perl 5.8.0.
-It has now been fixed.
-
-=item *
-
-Perl 5.10.0 introduced some faulty logic that made "U*" in the middle of
-a pack template equivalent to "U0" if the input string was empty. This has
-been fixed [RT #90160].
-
-=item *
-
-Destructors on objects were not called during global destruction on objects
-that were not referenced by any scalars. This could happen if an array
-element were blessed (e.g., C<bless \$a[0]>) or if a closure referenced a
-blessed variable (C<bless \my @a; sub foo { @a }>).
-
-Now there is an extra pass during global destruction to fire destructors on
-any objects that might be left after the usual passes that check for
-objects referenced by scalars [RT #36347].
-
-This bug fix was added in Perl 5.13.9, but caused problems with some CPAN
-modules that were relying on the bug. Since it was so close to Perl
-5.14.0, the fix was reverted in 5.13.10, to allow more time for the modules
-to adapt. Hopefully they will be fixed soon (see L</Known Problems>,
-below).
-
-=item *
-
-C<given> was not calling set-magic on the implicit lexical C<$_> that it
-uses. This meant, for example, that C<pos> would be remembered from one
-execution of the same C<given> block to the next, even if the input were a
-different variable [RT #84526].
-
-=item *
-
-The "R" command for restarting a debugger session has been fixed to work on
-Windows, or any other system lacking a C<POSIX::_SC_OPEN_MAX> constant
-[RT #87740].
-
-=item *
-
-Fixed a case where it was possible that a freed buffer may have been read
-from when parsing a here document [RT #90128].
-
-=item *
-
-The C<study> function could become confused if fed a string longer than
-2**31 characters. Now it simply skips such strings.
-
-=item *
-
-C<each(I<ARRAY>)> is now wrapped in C<defined(...)>, like C<each(I<HASH>)>,
-inside a C<when> condition [RT #90888].
-
-=item *
-
-In @INC filters (subroutines returned by subroutines in @INC), $_ used to
-misbehave: If returned from a subroutine, it would not be copied, but the
-variable itself would be returned; and freeing $_ (e.g., with C<undef *_>)
-would cause perl to crash. This has been fixed [RT #91880].
-
-=item *
-
-An ASCII single quote (') in a symbol name is meant to be equivalent to a
-double colon (::) except at the end of the name. It was not equivalent if
-followed by a null character, but now it is [RT #88138].
-
-=item *
-
-The abbreviations for four C1 control characters
-C<MW>
-C<PM>,
-C<RI>,
-and
-C<ST>
-were previously unrecognized by C<\N{}>,
-vianame(), and string_vianame().
-
-=item *
-
-Some cases of threads crashing due to memory allocation during cloning have
-been fixed [RT #90006].
-
-=item *
-
-Attempting to C<goto> out of a tied handle method used to cause memory
-corruption or crashes. Now it produces an error message instead
-[RT #8611].
-
-=back
-
-=head2 Additional fixes by ticket number
-
-XXX Prefix these with "\n=item *\n" once the list is final
-
-Fixed RT #88822: Test failure t/re_fold_grind.t with bleadperl
-Fixed RT #89896: Locale::Maketext test failure
-
-XXX Comments from FC: I do not think these two are necessary.
-
=head1 Known Problems
XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
=item *
-The fix for RT #36347 causes test failures for C<Gtk2> and C<Tk> on some
-systems [RT #82542].
+XXX
=back
=head1 Acknowledgements
-XXX The list of people to thank goes here.
+XXX Generate this with:
+
+ perl Porting/acknowledgements.pl v5.15.1..HEAD
=head1 Reporting Bugs
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
+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
https://perl5.git.perl.org / perl5.git / blobdiff