=encoding utf8
+=for comment
+Stuff that needs to be done still:
+70502ce [perl #119101] Extraneous warnings in Parse::ErrorString::Perl
+aa8c2dc Fix RT #41461 (with a test).
+
=head1 NAME
[ this is a template for a new perldelta file. Any text flagged as XXX needs
=item *
+L<B> has been upgraded from version 1.44 to 1.45.
+
+Calling the C<GV> method on C<B::CV> objects created from a lexical
+sub would return nonsense, possibly crashing perl. C<GV> now returns
+C<undef> for lexical subs. [perl #118525]
+
+Added the C<NAME_HEK> method to return the name of a lexical sub.
+
+=item *
+
+L<bignum> has been upgraded from version 0.35 to 0.36.
+
+L<bigrat> wasn't correctly updating an internal variable when C<use>d
+with a C<lib> option.
+
+=item *
+
+L<Carp> has been upgraded from 1.30 to 1.31
+
+L<Carp> now handles objects with string overloads. It also allows objects
+to specify how they appear in the stack dump with a C<CARP_TRACE> method,
+and also allows the user to specify their own formatter for objects without
+C<CARP_TRACE> as well as other references. [perl #92446]
+
+=item *
+
+L<Compress::Raw::Bzip2> has been upgraded from 2.061 to 2.062.
+
+=item *
+
+L<Compress::Raw::Zlib> has been upgraded from 2.061 to 2.062.
+
+=item *
+
+L<Config::Perl::V> has been upgraded from version 0.18 to 0.19.
+
+=item *
+
L<Data::Dumper> has been upgraded from version 2.147 to 2.148.
The compatbility of the XS implementation with the pure perl version
=item *
+L<Devel::Peek> has been upgraded from version 1.12 to 1.13.
+
+The C<SvREFCNT_inc()> and C<SvREFCNT_dec()> functions have been
+removed and C<SvREFCNT()> will now work on non-scalars. [perl #117793]
+
+C<Dump> now checks its arguments at compile time. Both arguments are now
+evaluated in scalar context, with exceptions for @arrays and %hashes,
+allowing aggregates to be dumped directly. The first argument is evaluated
+in rvalue scalar context, allowing rvalue C<pos> and C<substr> to be
+dumped.
+
+C<fill_mstats> no longer crashes if its argument is not already a string.
+[perl #92260]
+
+=item *
+
+L<Encode> has been upgraded from version 2.51 to 2.52.
+
+Encoding "0" with MIME-Headers no longer gets a blank string.
+
+=item *
+
+L<Exporter> has been upgraded from version 5.68 to 5.69.
+
+L<Exporter> would ignore custom C<$SIG{__WARN__}> handlers in
+C<Exporter::Heavy>. [perl #39739]
+
+=item *
+
+The IO-Compress module collection has been upgraded from 2.061 to 2.062.
+
+=item *
+
+L<IPC::Cmd> has been upgraded from version 0.82 to 0.84.
+
+C<run_forked> has various fixes/improvements, L<Socket> is only used where
+needed and a regression introduced in 0.78 has been fixed.
+
+=item *
+
+L<IPC::Open3> has been upgradded from version 1.14 to 1.15.
+
+C<open3> would leak a zombie process if the child process I/O
+redirection or exec() failed. [perl #114722]
+
+=item *
+
+The libnet module collection has been upgraded from version 1.22 to 1.23.
+
+=item *
+
+L<List::Util> has been upgraded from version 1.27 to 1.30
+
+L<List::Util> now includes C<pairgrep>, C<pairmap>, C<pairs>, C<pairkeys>,
+C<pairvalues> and C<pairfirst> functions that operate on even-sized lists of
+pairs.
+
+=item *
+
+L<parent> has been upgraded from version 0.225 to 0.226.
+
+=item *
+
+L<Socket> has been upgraded from version 2.010 to 2.011.
+
+Handle FreeBSD (or other platforms) returning shorter AF_UNIX sockaddr
+structures due to embedded sun_len. [cpan #86613]
+
+=item *
+
L<Storable> has been upgraded from version 2.45 to 2.46.
Avoid creating temporary objects for STORABLE_attach when they aren't
required. [perl #118907]
+=item *
+
+L<Time::Piece> has been upgraded from version 1.21 to 1.22.
+
=back
=head2 Removed Modules and Pragmata
=item *
-XXX L<message|perldiag/"message">
+L<Argument "%s" treated as 0 in increment (++)|perldiag/"Argument
+"%s" treated as 0 in increment (++)">
+
+(W numeric) The indicated string was fed as an argument to the C<++>
+operator which expects either a number or a string matching
+C</^[a-zA-Z]*[0-9]*\z/>. See L<perlop/Auto-increment and
+Auto-decrement> for details.
=back
=item *
-XXX
+C<sv_pos_b2u_flags> has been added to the API. It is similar to
+C<sv_pos_b2u>, but supports long strings on 64-bit platforms.
+
+=item *
+
+C<PL_exit_flags> can now be used by perl embedders or other XS code to
+have perl warn or abort() on an attempted exit. [perl #52000]
=back
=item *
-XXX
+Autovivifying a subroutine stub via C<\&$glob> started causing crashes in
+Perl 5.18.0 if the $glob was merely a copy of a real glob, i.e., a scalar
+that had had a glob assigned to it. This has been fixed [perl #119051].
+
+=item *
+
+On 64-bit platforms C<pos> can now be set to a value higher than 2**31-1
+[perl #72766].
+
+=item *
+
+Perl used to leak an implementation detail when it came to referencing the
+return values of certain operators. C<for ($a+$b) { warn \$_; warn \$_ }>
+used to display two different memory addresses, because the C<\> operator
+was copying the variable. Under threaded builds, it would also happen for
+constants (C<for(1) { ... }>). This has been fixed [perl #21979, #78194,
+#89188, #109746, #114838, #115388].
+
+=item *
+
+The range operator C<..> was returning the same modifiable scalars with
+each call, unless it was the only thing in a C<foreach> loop header. This
+meant that changes to values within the list returned would be visible the
+next time the operator was executed [perl #3105].
+
+=item *
+
+Constant folding and subroutine inlining no longer cause operations that
+would normally return new modifiable scalars to return read-only values
+instead.
+
+=item *
+
+Closures of the form C<sub () { $some_variable }> are no longer inlined,
+causing changes to the variable to be ignored by callers of the subroutine
+[perl #79908].
+
+=item *
+
+Return values of certain operators such as C<ref> would sometimes be shared
+between recursive calls to the same subroutine, causing the inner call to
+modify the value returned by C<ref> in the outer call. This has been
+fixed.
+
+=item *
+
+C<__PACKAGE__> and constants returning a package name or hash key are now
+consistently read-only. In various previous Perl releases, they have
+become mutable under certain circumstances.
+
+=item *
+
+C</$qr/p> was broken in Perl 5.18.0; the C</p> flag was ignored. This has
+been fixed [perl #118213].
+
+=item *
+
+Starting in v5.18.0, a construct like C</[#](?{})/x> would have its C<#>
+incorrectly interpreted as a comment. The code block would be skipped,
+unparsed. This has been corrected.
+
+=item *
+
+Starting in Perl 5.001, a regular expression like C</[#$a]/x> or
+C</[#]$a/x> would have its C<#> incorrectly interpreted as a comment, so
+the variable would not interpolate. This has been corrected [perl #45667].
+
+=item *
+
+On non-threaded builds, setting C<${"_<filename"}> to a reference or
+typeglob no longer causes C<__FILE__> and some error messages to produce a
+corrupt string, and no longer prevents C<#line> directives in string evals
+from providing the source lines to the debugger. Threaded builds were
+unaffected.
+
+=item *
+
+Enabling "used once" warnings no longer causes crashes on stash
+circularities created at compile time (C<*Foo::Bar::Foo:: = *Foo::>).
+
+=item *
+
+Undef constants used in hash keys (C<use constant u => undef; $h{+u}>) no
+longer produce "uninitialized" warnings at compile time.
+
+=item *
+
+Modifying a substitution target inside the substitution replacement no
+longer causes crashes.
+
+=item *
+
+The first statement inside a string eval used to use the wrong pragma setting sometimes during constant folding. C<eval 'uc chr 0xe0'> would randomly choose between Unicode, byte, and locale semantics. This has been
+fixed.
+
+=item *
+
+The handling of return values of @INC filters (subroutines returned by
+subroutines in @INC) has been fixed in various ways. Previously tied
+variables were mishandled, and setting $_ to a reference or typeglob could
+result in crashes.
+
+=item *
+
+The C<SvPVbyte> XS function has been fixed to work with tied scalars
+returning something other than a string. It used to return utf8 in those
+cases where C<SvPV> would.
+
+=item *
+
+Perl 5.18.0 inadvertently made dereferenced regular expressions
+S<(C<${ qr// }>)> false as booleans. This has been fixed.
+
+=item *
+
+Perl 5.18.0 inadvertently made C<--> and C<++> crash on dereferenced
+regular expressions, and stopped C<++> from flattening vstrings.
+
+=item *
+
+C<bless> no longer dies with "Can't bless non-reference value" if its first
+argument is a tied reference.
+
+=item *
+
+C<reset> with an argument no longer skips copy-on-write scalars, regular
+expressions, typeglob copies, and vstrings. Also, when encountering those
+or read-only values, it no longer skips any array or hash with the same
+name.
+
+=item *
+
+C<reset> with an argument now skips scalars aliased to typeglobs
+(C<for $z (*foo) { reset "z" }>). Previously it would corrupt memory or
+crash.
+
+=item *
+
+C<ucfirst> and C<lcfirst> were not respecting the bytes pragma. This was a
+regression from v5.12 [perl #117355].
+
+=item *
+
+The use of C<\G> in regular expressions, where it's not at the start of
+the pattern, is now slightly less buggy (although it is still somewhat
+problematic).
+
+=item *
+
+Where a regular expression included code blocks (C</(?{...})/>), and where
+the use of constant overloading triggered a re-compilation of the code block,
+the second compilation didn't see its outer lexical scope. This was a
+regression in 5.18.0.
=back
https://perl5.git.perl.org / perl5.git / blobdiff