2338 lines
53 KiB
Plaintext
2338 lines
53 KiB
Plaintext
=head1 NAME
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perl589delta - what is new for perl v5.8.9
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=head1 DESCRIPTION
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This document describes differences between the 5.8.8 release and
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the 5.8.9 release.
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=head1 Notice
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The 5.8.9 release will be the last significant release of the 5.8.x
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series. Any future releases of 5.8.x will likely only be to deal with
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security issues, and platform build failures. Hence you should look to
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migrating to 5.10.x, if you have not started already.
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See L</"Known Problems"> for more information.
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=head1 Incompatible Changes
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A particular construction in the source code of extensions written in C++
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may need changing. See L</"Changed Internals"> for more details. All
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extensions written in C, most written in C++, and all existing compiled
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extensions are unaffected. This was necessary to improve C++ support.
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Other than this, there are no changes intentionally incompatible with 5.8.8.
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If any exist, they are bugs and reports are welcome.
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=head1 Core Enhancements
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=head2 Unicode Character Database 5.1.0.
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The copy of the Unicode Character Database included in Perl 5.8 has
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been updated to 5.1.0 from 4.1.0. See
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L<http://www.unicode.org/versions/Unicode5.1.0/#NotableChanges> for the
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notable changes.
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=head2 stat and -X on directory handles
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It is now possible to call C<stat> and the C<-X> filestat operators on
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directory handles. As both directory and file handles are barewords, there
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can be ambiguities over which was intended. In these situations the file
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handle semantics are preferred. Both also treat C<*FILE{IO}> filehandles
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like C<*FILE> filehandles.
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=head2 Source filters in @INC
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It's possible to enhance the mechanism of subroutine hooks in @INC by
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adding a source filter on top of the filehandle opened and returned by the
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hook. This feature was planned a long time ago, but wasn't quite working
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until now. See L<perlfunc/require> for details. (Nicholas Clark)
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=head2 Exceptions in constant folding
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The constant folding routine is now wrapped in an exception handler, and
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if folding throws an exception (such as attempting to evaluate 0/0), perl
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now retains the current optree, rather than aborting the whole program.
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Without this change, programs would not compile if they had expressions that
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happened to generate exceptions, even though those expressions were in code
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that could never be reached at runtime. (Nicholas Clark, Dave Mitchell)
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=head2 C<no VERSION>
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You can now use C<no> followed by a version number to specify that you
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want to use a version of perl older than the specified one.
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=head2 Improved internal UTF-8 caching code
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The code that caches calculated UTF-8 byte offsets for character offsets for
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a string has been re-written. Several bugs have been located and eliminated,
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and the code now makes better use of the information it has, so should be
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faster. In particular, it doesn't scan to the end of a string before
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calculating an offset within the string, which should speed up some operations
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on long strings. It is now possible to disable the caching code at run time,
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to verify that it is not the cause of suspected problems.
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=head2 Runtime relocatable installations
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There is now F<Configure> support for creating a perl tree that is relocatable
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at run time. see L</Relocatable installations>.
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=head2 New internal variables
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=over 4
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=item C<${^CHILD_ERROR_NATIVE}>
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This variable gives the native status returned by the last pipe close,
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backtick command, successful call to C<wait> or C<waitpid>, or from the
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C<system> operator. See L<perlvar> for details. (Contributed by Gisle Aas.)
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=item C<${^UTF8CACHE}>
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This variable controls the state of the internal UTF-8 offset caching code.
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1 for on (the default), 0 for off, -1 to debug the caching code by checking
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all its results against linear scans, and panicking on any discrepancy.
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=back
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=head2 C<readpipe> is now overridable
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The built-in function C<readpipe> is now overridable. Overriding it permits
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also to override its operator counterpart, C<qx//> (also known as C<``>).
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=head2 simple exception handling macros
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Perl 5.8.9 (and 5.10.0 onwards) now provides a couple of macros to do very
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basic exception handling in XS modules. You can use these macros if you call
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code that may C<croak>, but you need to do some cleanup before giving control
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back to Perl. See L<perlguts/Exception Handling> for more details.
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=head2 -D option enhancements
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=over
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=item *
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C<-Dq> suppresses the I<EXECUTING...> message when running under C<-D>
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=item *
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C<-Dl> logs runops loop entry and exit, and jump level popping.
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=item *
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C<-Dv> displays the process id as part of the trace output.
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=back
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=head2 XS-assisted SWASHGET
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Some pure-perl code that the regexp engine was using to retrieve Unicode
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properties and transliteration mappings has been reimplemented in XS
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for faster execution.
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(SADAHIRO Tomoyuki)
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=head2 Constant subroutines
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The interpreter internals now support a far more memory efficient form of
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inlineable constants. Storing a reference to a constant value in a symbol
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table is equivalent to a full typeglob referencing a constant subroutine,
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but using about 400 bytes less memory. This proxy constant subroutine is
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automatically upgraded to a real typeglob with subroutine if necessary.
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The approach taken is analogous to the existing space optimisation for
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subroutine stub declarations, which are stored as plain scalars in place
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of the full typeglob.
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However, to aid backwards compatibility of existing code, which (wrongly)
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does not expect anything other than typeglobs in symbol tables, nothing in
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core uses this feature, other than the regression tests.
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Stubs for prototyped subroutines have been stored in symbol tables as plain
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strings, and stubs for unprototyped subroutines as the number -1, since 5.005,
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so code which assumes that the core only places typeglobs in symbol tables
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has been making incorrect assumptions for over 10 years.
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=head1 New Platforms
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Compile support added for:
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=over
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=item *
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DragonFlyBSD
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=item *
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MidnightBSD
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=item *
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MirOS BSD
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=item *
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RISC OS
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=item *
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Cray XT4/Catamount
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=back
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=head1 Modules and Pragmata
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=head2 New Modules
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=over
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=item *
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C<Module::Pluggable> is a simple framework to create modules that accept
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pluggable sub-modules. The bundled version is 3.8
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=item *
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C<Module::CoreList> is a hash of hashes that is keyed on perl version as
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indicated in C<$]>. The bundled version is 2.17
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=item *
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C<Win32API::File> now available in core on Microsoft Windows. The bundled
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version is 0.1001_01
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=item *
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C<Devel::InnerPackage> finds all the packages defined by a single file. It is
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part of the C<Module::Pluggable> distribution. The bundled version is 0.3
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=back
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=head2 Updated Modules
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=over
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=item *
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C<attributes> upgraded to version 0.09
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=item *
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C<AutoLoader> upgraded to version 5.67
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=item *
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C<AutoSplit> upgraded to 1.06
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=item *
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C<autouse> upgraded to version 1.06
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=item *
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C<B> upgraded from 1.09_01 to 1.19
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=over
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=item *
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provides new pad related abstraction macros C<B::NV::COP_SEQ_RANGE_LOW>,
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C<B::NV::COP_SEQ_RANGE_HIGH>, C<B::NV::PARENT_PAD_INDEX>,
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C<B::NV::PARENT_FAKELEX_FLAGS>, which hides the difference in storage in
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5.10.0 and later.
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=item *
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provides C<B::sub_generation>, which exposes C<PL_sub_generation>
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=item *
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provides C<B::GV::isGV_with_GP>, which on pre-5.10 perls always returns true.
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=item *
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New type C<B::HE> added with methods C<VAL>, C<HASH> and C<SVKEY_force>
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=item *
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The C<B::GVf_IMPORTED_CV> flag is now set correctly when a proxy
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constant subroutine is imported.
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=item *
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bugs fixed in the handling of C<PMOP>s.
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=item *
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C<B::BM::PREVIOUS> returns now C<U32>, not C<U16>.
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C<B::CV::START> and C<B:CV::ROOT> return now C<NULL> on an XSUB,
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C<B::CV::XSUB> and C<B::CV::XSUBANY> return 0 on a non-XSUB.
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=back
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=item *
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C<B::C> upgraded to 1.05
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=item *
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C<B::Concise> upgraded to 0.76
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=over
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=item *
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new option C<-src> causes the rendering of each statement (starting with
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the nextstate OP) to be preceded by the first line of source code that
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generates it.
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=item *
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new option C<-stash="somepackage">, C<require>s "somepackage", and then renders
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each function defined in its namespace.
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=item *
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now has documentation of detailed hint symbols.
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=back
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=item *
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C<B::Debug> upgraded to version 1.05
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=item *
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C<B::Deparse> upgraded to version 0.87
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=over 4
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=item *
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properly deparse C<print readpipe $x, $y>.
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=item *
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now handles C<< ''->() >>, C<::()>, C<sub :: {}>, I<etc.> correctly [RT #43010].
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All bugs in parsing these kinds of syntax are now fixed:
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perl -MO=Deparse -e '"my %h = "->()'
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perl -MO=Deparse -e '::->()'
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perl -MO=Deparse -e 'sub :: {}'
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perl -MO=Deparse -e 'package a; sub a::b::c {}'
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perl -MO=Deparse -e 'sub the::main::road {}'
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=item *
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does B<not> deparse C<$^H{v_string}>, which is automatically set by the
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internals.
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=back
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=item *
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C<B::Lint> upgraded to version 1.11
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=item *
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C<B::Terse> upgraded to version 1.05
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=item *
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C<base> upgraded to version 2.13
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=over 4
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=item *
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loading a module via base.pm would mask a global C<$SIG{__DIE__}> in that
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module.
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=item *
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push all classes at once in C<@ISA>
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=back
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=item *
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C<Benchmark> upgraded to version 1.10
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=item *
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C<bigint> upgraded to 0.23
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=item *
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C<bignum> upgraded to 0.23
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=item *
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C<bigrat> upgraded to 0.23
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=item *
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C<blib> upgraded to 0.04
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=item *
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C<Carp> upgraded to version 1.10
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The argument backtrace code now shows C<undef> as C<undef>,
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instead of a string I<"undef">.
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=item *
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C<CGI> upgraded to version 3.42
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=item *
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C<charnames> upgraded to 1.06
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=item *
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C<constant> upgraded to version 1.17
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=item *
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C<CPAN> upgraded to version 1.9301
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=item *
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C<Cwd> upgraded to version 3.29 with some platform specific
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improvements (including for VMS).
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=item *
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C<Data::Dumper> upgraded to version 2.121_17
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=over
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=item *
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Fixes hash iterator current position with the pure Perl version [RT #40668]
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=item *
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Performance enhancements, which will be most evident on platforms where
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repeated calls to C's C<realloc()> are slow, such as Win32.
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=back
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=item *
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C<DB_File> upgraded to version 1.817
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=item *
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C<DB_Filter> upgraded to version 0.02
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=item *
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C<Devel::DProf> upgraded to version 20080331.00
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=item *
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C<Devel::Peek> upgraded to version 1.04
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=item *
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C<Devel::PPPort> upgraded to version 3.14
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=item *
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C<diagnostics> upgraded to version 1.16
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=item *
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C<Digest> upgraded to version 1.15
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=item *
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C<Digest::MD5> upgraded to version 2.37
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=item *
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C<DirHandle> upgraded to version 1.02
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=over
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=item *
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now localises C<$.>, C<$@>, C<$!>, C<$^E>, and C<$?> before closing the
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directory handle to suppress leaking any side effects of warnings about it
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already being closed.
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=back
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=item *
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C<DynaLoader> upgraded to version 1.09
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C<DynaLoader> can now dynamically load a loadable object from a file with a
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non-default file extension.
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=item *
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C<Encode> upgraded to version 2.26
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C<Encode::Alias> includes a fix for encoding "646" on Solaris (better known as
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ASCII).
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=item *
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C<English> upgraded to version 1.03
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=item *
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C<Errno> upgraded to version 1.10
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=item *
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C<Exporter> upgraded to version 5.63
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=item *
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C<ExtUtils::Command> upgraded to version 1.15
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=item *
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C<ExtUtils::Constant> upgraded to version 0.21
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=item *
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C<ExtUtils::Embed> upgraded to version 1.28
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=item *
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C<ExtUtils::Install> upgraded to version 1.50_01
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=item *
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C<ExtUtils::Installed> upgraded to version 1.43
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=item *
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C<ExtUtils::MakeMaker> upgraded to version 6.48
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=over
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=item *
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support for C<INSTALLSITESCRIPT> and C<INSTALLVENDORSCRIPT>
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configuration.
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=back
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=item *
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C<ExtUtils::Manifest> upgraded to version 1.55
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=item *
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C<ExtUtils::ParseXS> upgraded to version 2.19
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=item *
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C<Fatal> upgraded to version 1.06
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=over
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=item *
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allows built-ins in C<CORE::GLOBAL> to be made fatal.
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=back
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=item *
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C<Fcntl> upgraded to version 1.06
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=item *
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C<fields> upgraded to version 2.12
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=item *
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C<File::Basename> upgraded to version 2.77
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=item *
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C<FileCache> upgraded to version 1.07
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=item *
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C<File::Compare> upgraded to 1.1005
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=item *
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C<File::Copy> upgraded to 2.13
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=over 4
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=item *
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now uses 3-arg open.
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=back
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=item *
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C<File::DosGlob> upgraded to 1.01
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=item *
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C<File::Find> upgraded to version 1.13
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=item *
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C<File::Glob> upgraded to version 1.06
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=over
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=item *
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fixes spurious results with brackets inside braces.
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=back
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=item *
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C<File::Path> upgraded to version 2.07_02
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=item *
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C<File::Spec> upgraded to version 3.29
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=over 4
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=item *
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|
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improved handling of bad arguments.
|
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=item *
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some platform specific improvements (including for VMS and Cygwin), with
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an optimisation on C<abs2rel> when handling both relative arguments.
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=back
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=item *
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C<File::stat> upgraded to version 1.01
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=item *
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C<File::Temp> upgraded to version 0.20
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=item *
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C<filetest> upgraded to version 1.02
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=item *
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C<Filter::Util::Call> upgraded to version 1.07
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=item *
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C<Filter::Simple> upgraded to version 0.83
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=item *
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C<FindBin> upgraded to version 1.49
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=item *
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C<GDBM_File> upgraded to version 1.09
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=item *
|
|
|
|
C<Getopt::Long> upgraded to version 2.37
|
|
|
|
=item *
|
|
|
|
C<Getopt::Std> upgraded to version 1.06
|
|
|
|
=item *
|
|
|
|
C<Hash::Util> upgraded to version 0.06
|
|
|
|
=item *
|
|
|
|
C<if> upgraded to version 0.05
|
|
|
|
=item *
|
|
|
|
C<IO> upgraded to version 1.23
|
|
|
|
Reduced number of calls to C<getpeername> in C<IO::Socket>
|
|
|
|
=item *
|
|
|
|
C<IPC::Open> upgraded to version 1.03
|
|
|
|
=item *
|
|
|
|
C<IPC::Open3> upgraded to version 1.03
|
|
|
|
=item *
|
|
|
|
C<IPC::SysV> upgraded to version 2.00
|
|
|
|
=item *
|
|
|
|
C<lib> upgraded to version 0.61
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
avoid warning about loading F<.par> files.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<libnet> upgraded to version 1.22
|
|
|
|
=item *
|
|
|
|
C<List::Util> upgraded to 1.19
|
|
|
|
=item *
|
|
|
|
C<Locale::Maketext> upgraded to 1.13
|
|
|
|
=item *
|
|
|
|
C<Math::BigFloat> upgraded to version 1.60
|
|
|
|
=item *
|
|
|
|
C<Math::BigInt> upgraded to version 1.89
|
|
|
|
=item *
|
|
|
|
C<Math::BigRat> upgraded to version 0.22
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
implements new C<as_float> method.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<Math::Complex> upgraded to version 1.54.
|
|
|
|
=item *
|
|
|
|
C<Math::Trig> upgraded to version 1.18.
|
|
|
|
=item *
|
|
|
|
C<NDBM_File> upgraded to version 1.07
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
improve F<g++> handling for systems using GDBM compatibility headers.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<Net::Ping> upgraded to version 2.35
|
|
|
|
=item *
|
|
|
|
C<NEXT> upgraded to version 0.61
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
fix several bugs with C<NEXT> when working with C<AUTOLOAD>, C<eval> block, and
|
|
within overloaded stringification.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<ODBM_File> upgraded to 1.07
|
|
|
|
=item *
|
|
|
|
C<open> upgraded to 1.06
|
|
|
|
=item *
|
|
|
|
C<ops> upgraded to 1.02
|
|
|
|
=item *
|
|
|
|
C<PerlIO::encoding> upgraded to version 0.11
|
|
|
|
=item *
|
|
|
|
C<PerlIO::scalar> upgraded to version 0.06
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
[RT #40267] C<PerlIO::scalar> doesn't respect readonly-ness.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<PerlIO::via> upgraded to version 0.05
|
|
|
|
=item *
|
|
|
|
C<Pod::Html> upgraded to version 1.09
|
|
|
|
=item *
|
|
|
|
C<Pod::Parser> upgraded to version 1.35
|
|
|
|
=item *
|
|
|
|
C<Pod::Usage> upgraded to version 1.35
|
|
|
|
=item *
|
|
|
|
C<POSIX> upgraded to version 1.15
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
C<POSIX> constants that duplicate those in C<Fcntl> are now imported from
|
|
C<Fcntl> and re-exported, rather than being duplicated by C<POSIX>
|
|
|
|
=item *
|
|
|
|
C<POSIX::remove> can remove empty directories.
|
|
|
|
=item *
|
|
|
|
C<POSIX::setlocale> safer to call multiple times.
|
|
|
|
=item *
|
|
|
|
C<POSIX::SigRt> added, which provides access to POSIX realtime signal
|
|
functionality on systems that support it.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<re> upgraded to version 0.06_01
|
|
|
|
=item *
|
|
|
|
C<Safe> upgraded to version 2.16
|
|
|
|
=item *
|
|
|
|
C<Scalar::Util> upgraded to 1.19
|
|
|
|
=item *
|
|
|
|
C<SDBM_File> upgraded to version 1.06
|
|
|
|
=item *
|
|
|
|
C<SelfLoader> upgraded to version 1.17
|
|
|
|
=item *
|
|
|
|
C<Shell> upgraded to version 0.72
|
|
|
|
=item *
|
|
|
|
C<sigtrap> upgraded to version 1.04
|
|
|
|
=item *
|
|
|
|
C<Socket> upgraded to version 1.81
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
this fixes an optimistic use of C<gethostbyname>
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<Storable> upgraded to 2.19
|
|
|
|
=item *
|
|
|
|
C<Switch> upgraded to version 2.13
|
|
|
|
=item *
|
|
|
|
C<Sys::Syslog> upgraded to version 0.27
|
|
|
|
=item *
|
|
|
|
C<Term::ANSIColor> upgraded to version 1.12
|
|
|
|
=item *
|
|
|
|
C<Term::Cap> upgraded to version 1.12
|
|
|
|
=item *
|
|
|
|
C<Term::ReadLine> upgraded to version 1.03
|
|
|
|
=item *
|
|
|
|
C<Test::Builder> upgraded to version 0.80
|
|
|
|
=item *
|
|
|
|
C<Test::Harness> upgraded version to 2.64
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
this makes it able to handle newlines.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<Test::More> upgraded to version 0.80
|
|
|
|
=item *
|
|
|
|
C<Test::Simple> upgraded to version 0.80
|
|
|
|
=item *
|
|
|
|
C<Text::Balanced> upgraded to version 1.98
|
|
|
|
=item *
|
|
|
|
C<Text::ParseWords> upgraded to version 3.27
|
|
|
|
=item *
|
|
|
|
C<Text::Soundex> upgraded to version 3.03
|
|
|
|
=item *
|
|
|
|
C<Text::Tabs> upgraded to version 2007.1117
|
|
|
|
=item *
|
|
|
|
C<Text::Wrap> upgraded to version 2006.1117
|
|
|
|
=item *
|
|
|
|
C<Thread> upgraded to version 2.01
|
|
|
|
=item *
|
|
|
|
C<Thread::Semaphore> upgraded to version 2.09
|
|
|
|
=item *
|
|
|
|
C<Thread::Queue> upgraded to version 2.11
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
added capability to add complex structures (e.g., hash of hashes) to queues.
|
|
|
|
=item *
|
|
|
|
added capability to dequeue multiple items at once.
|
|
|
|
=item *
|
|
|
|
added new methods to inspect and manipulate queues: C<peek>, C<insert> and
|
|
C<extract>
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<Tie::Handle> upgraded to version 4.2
|
|
|
|
=item *
|
|
|
|
C<Tie::Hash> upgraded to version 1.03
|
|
|
|
=item *
|
|
|
|
C<Tie::Memoize> upgraded to version 1.1
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
C<Tie::Memoize::EXISTS> now correctly caches its results.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<Tie::RefHash> upgraded to version 1.38
|
|
|
|
=item *
|
|
|
|
C<Tie::Scalar> upgraded to version 1.01
|
|
|
|
=item *
|
|
|
|
C<Tie::StdHandle> upgraded to version 4.2
|
|
|
|
=item *
|
|
|
|
C<Time::gmtime> upgraded to version 1.03
|
|
|
|
=item *
|
|
|
|
C<Time::Local> upgraded to version 1.1901
|
|
|
|
=item *
|
|
|
|
C<Time::HiRes> upgraded to version 1.9715 with various build improvements
|
|
(including VMS) and minor platform-specific bug fixes (including
|
|
for HP-UX 11 ia64).
|
|
|
|
=item *
|
|
|
|
C<threads> upgraded to 1.71
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
new thread state information methods: C<is_running>, C<is_detached>
|
|
and C<is_joinable>. C<list> method enhanced to return running or joinable
|
|
threads.
|
|
|
|
=item *
|
|
|
|
new thread signal method: C<kill>
|
|
|
|
=item *
|
|
|
|
added capability to specify thread stack size.
|
|
|
|
=item *
|
|
|
|
added capability to control thread exiting behavior. Added a new C<exit>
|
|
method.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<threads::shared> upgraded to version 1.27
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
smaller and faster implementation that eliminates one internal structure and
|
|
the consequent level of indirection.
|
|
|
|
=item *
|
|
|
|
user locks are now stored in a safer manner.
|
|
|
|
=item *
|
|
|
|
new function C<shared_clone> creates a copy of an object leaving
|
|
shared elements as-is and deep-cloning non-shared elements.
|
|
|
|
=item *
|
|
|
|
added new C<is_shared> method.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<Unicode::Normalize> upgraded to version 1.02
|
|
|
|
=item *
|
|
|
|
C<Unicode::UCD> upgraded to version 0.25
|
|
|
|
=item *
|
|
|
|
C<warnings> upgraded to version 1.05_01
|
|
|
|
=item *
|
|
|
|
C<Win32> upgraded to version 0.38
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
added new function C<GetCurrentProcessId> which returns the regular Windows
|
|
process identifier of the current process, even when called from within a fork.
|
|
|
|
=back
|
|
|
|
=item *
|
|
|
|
C<XSLoader> upgraded to version 0.10
|
|
|
|
=item *
|
|
|
|
C<XS::APItest> and C<XS::Typemap> are for internal use only and hence
|
|
no longer installed. Many more tests have been added to C<XS::APItest>.
|
|
|
|
=back
|
|
|
|
=head1 Utility Changes
|
|
|
|
=head2 debugger upgraded to version 1.31
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Andreas KE<ouml>nig contributed two functions to save and load the debugger
|
|
history.
|
|
|
|
=item *
|
|
|
|
C<NEXT::AUTOLOAD> no longer emits warnings under the debugger.
|
|
|
|
=item *
|
|
|
|
The debugger should now correctly find tty the device on OS X 10.5 and VMS
|
|
when the program C<fork>s.
|
|
|
|
=item *
|
|
|
|
LVALUE subs now work inside the debugger.
|
|
|
|
=back
|
|
|
|
=head2 F<perlthanks>
|
|
|
|
Perl 5.8.9 adds a new utility F<perlthanks>, which is a variant of F<perlbug>,
|
|
but for sending non-bug-reports to the authors and maintainers of Perl.
|
|
Getting nothing but bug reports can become a bit demoralising - we'll see if
|
|
this changes things.
|
|
|
|
=head2 F<perlbug>
|
|
|
|
F<perlbug> now checks if you're reporting about a non-core module and suggests
|
|
you report it to the CPAN author instead.
|
|
|
|
=head2 F<h2xs>
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
won't define an empty string as a constant [RT #25366]
|
|
|
|
=item *
|
|
|
|
has examples for C<h2xs -X>
|
|
|
|
=back
|
|
|
|
=head2 F<h2ph>
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
now attempts to deal sensibly with the difference in path implications
|
|
between C<""> and C<< E<lt>E<gt> >> quoting in C<#include> statements.
|
|
|
|
=item *
|
|
|
|
now generates correct code for C<#if defined A || defined B>
|
|
[RT #39130]
|
|
|
|
=back
|
|
|
|
=head1 New Documentation
|
|
|
|
As usual, the documentation received its share of corrections, clarifications
|
|
and other nitfixes. More C<< X<...> >> tags were added for indexing.
|
|
|
|
L<perlunitut> is a tutorial written by Juerd Waalboer on Unicode-related
|
|
terminology and how to correctly handle Unicode in Perl scripts.
|
|
|
|
L<perlunicode> is updated in section user defined properties.
|
|
|
|
L<perluniintro> has been updated in the example of detecting data that is not
|
|
valid in particular encoding.
|
|
|
|
L<perlcommunity> provides an overview of the Perl Community along with further
|
|
resources.
|
|
|
|
L<CORE> documents the pseudo-namespace for Perl's core routines.
|
|
|
|
=head1 Changes to Existing Documentation
|
|
|
|
L<perlglossary> adds I<deprecated modules and features> and I<to be dropped modules>.
|
|
|
|
L<perlhack> has been updated and added resources on smoke testing.
|
|
|
|
The Perl FAQs (F<perlfaq1>..F<perlfaq9>) have been updated.
|
|
|
|
L<perlcheat> is updated with better details on C<\w>, C<\d>, and C<\s>.
|
|
|
|
L<perldebug> is updated with information on how to call the debugger.
|
|
|
|
L<perldiag> documentation updated with I<subroutine with an ampersand> on the
|
|
argument to C<exists> and C<delete> and also several terminology updates on
|
|
warnings.
|
|
|
|
L<perlfork> documents the limitation of C<exec> inside pseudo-processes.
|
|
|
|
L<perlfunc>:
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
Documentation is fixed in section C<caller> and C<pop>.
|
|
|
|
=item *
|
|
|
|
Function C<alarm> now mentions C<Time::HiRes::ualarm> in preference
|
|
to C<select>.
|
|
|
|
=item *
|
|
|
|
Regarding precedence in C<-X>, filetest operators are the same as unary
|
|
operators, but not regarding parsing and parentheses (spotted by Eirik Berg
|
|
Hanssen).
|
|
|
|
=item *
|
|
|
|
C<reverse> function documentation received scalar context examples.
|
|
|
|
=back
|
|
|
|
L<perllocale> documentation is adjusted for number localization and
|
|
C<POSIX::setlocale> to fix Debian bug #379463.
|
|
|
|
L<perlmodlib> is updated with C<CPAN::API::HOWTO> and
|
|
C<Sys::Syslog::win32::Win32>
|
|
|
|
L<perlre> documentation updated to reflect the differences between
|
|
C<[[:xxxxx:]]> and C<\p{IsXxxxx}> matches. Also added section on C</g> and
|
|
C</c> modifiers.
|
|
|
|
L<perlreguts> describe the internals of the regular expressions engine. It has
|
|
been contributed by Yves Orton.
|
|
|
|
L<perlrebackslash> describes all perl regular expression backslash and escape
|
|
sequences.
|
|
|
|
L<perlrecharclass> describes the syntax and use of character classes in
|
|
Perl Regular Expressions.
|
|
|
|
L<perlrun> is updated to clarify on the hash seed I<PERL_HASH_SEED>. Also more
|
|
information in options C<-x> and C<-u>.
|
|
|
|
L<perlsub> example is updated to use a lexical variable for C<opendir> syntax.
|
|
|
|
L<perlvar> fixes confusion about real GID C<$(> and effective GID C<$)>.
|
|
|
|
Perl thread tutorial example is fixed in section
|
|
L<perlthrtut/Queues: Passing Data Around> and L<perlthrtut>.
|
|
|
|
L<perlhack> documentation extensively improved by Jarkko Hietaniemi and others.
|
|
|
|
L<perltoot> provides information on modifying C<@UNIVERSAL::ISA>.
|
|
|
|
L<perlport> documentation extended to include different C<kill(-9, ...)>
|
|
semantics on Windows. It also clearly states C<dump> is not supported on Win32
|
|
and cygwin.
|
|
|
|
F<INSTALL> has been updated and modernised.
|
|
|
|
=head1 Performance Enhancements
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
The default since perl 5.000 has been for perl to create an empty scalar
|
|
with every new typeglob. The increased use of lexical variables means that
|
|
most are now unused. Thanks to Nicholas Clark's efforts, Perl can now be
|
|
compiled with C<-DPERL_DONT_CREATE_GVSV> to avoid creating these empty scalars.
|
|
This will significantly decrease the number of scalars allocated for all
|
|
configurations, and the number of scalars that need to be copied for ithread
|
|
creation. Whilst this option is binary compatible with existing perl
|
|
installations, it does change a long-standing assumption about the
|
|
internals, hence it is not enabled by default, as some third party code may
|
|
rely on the old behaviour.
|
|
|
|
We would recommend testing with this configuration on new deployments of
|
|
perl, particularly for multi-threaded servers, to see whether all third party
|
|
code is compatible with it, as this configuration may give useful performance
|
|
improvements. For existing installations we would not recommend changing to
|
|
this configuration unless thorough testing is performed before deployment.
|
|
|
|
=item *
|
|
|
|
C<diagnostics> no longer uses C<$&>, which results in large speedups
|
|
for regexp matching in all code using it.
|
|
|
|
=item *
|
|
|
|
Regular expressions classes of a single character are now treated the same as
|
|
if the character had been used as a literal, meaning that code that uses
|
|
char-classes as an escaping mechanism will see a speedup. (Yves Orton)
|
|
|
|
=item *
|
|
|
|
Creating anonymous array and hash references (ie. C<[]> and C<{}>) now incurs
|
|
no more overhead than creating an anonymous list or hash. Nicholas Clark
|
|
provided changes with a saving of two ops and one stack push, which was measured
|
|
as a slightly better than 5% improvement for these operations.
|
|
|
|
=item *
|
|
|
|
Many calls to C<strlen()> have been eliminated, either because the length was
|
|
already known, or by adopting or enhancing APIs that pass lengths. This has
|
|
been aided by the adoption of a C<my_sprintf()> wrapper, which returns the
|
|
correct C89 value - the length of the formatted string. Previously we could
|
|
not rely on the return value of C<sprintf()>, because on some ancient but
|
|
extant platforms it still returns C<char *>.
|
|
|
|
=item *
|
|
|
|
C<index> is now faster if the search string is stored in UTF-8 but only contains
|
|
characters in the Latin-1 range.
|
|
|
|
=item *
|
|
|
|
The Unicode swatch cache inside the regexp engine is now used. (the lookup had
|
|
a key mismatch, present since the initial implementation). [RT #42839]
|
|
|
|
=back
|
|
|
|
=head1 Installation and Configuration Improvements
|
|
|
|
=head2 Relocatable installations
|
|
|
|
There is now F<Configure> support for creating a relocatable perl tree. If
|
|
you F<Configure> with C<-Duserelocatableinc>, then the paths in C<@INC> (and
|
|
everything else in C<%Config>) can be optionally located via the path of the
|
|
F<perl> executable.
|
|
|
|
At start time, if any paths in C<@INC> or C<Config> that F<Configure> marked
|
|
as relocatable (by starting them with C<".../">), then they are prefixed the
|
|
directory of C<$^X>. This allows the relocation can be configured on a
|
|
per-directory basis, although the default with C<-Duserelocatableinc> is that
|
|
everything is relocated. The initial install is done to the original configured
|
|
prefix.
|
|
|
|
=head2 Configuration improvements
|
|
|
|
F<Configure> is now better at removing temporary files. Tom Callaway
|
|
(from RedHat) also contributed patches that complete the set of flags
|
|
passed to the compiler and the linker, in particular that C<-fPIC> is now
|
|
enabled on Linux. It will also croak when your F</dev/null> isn't a device.
|
|
|
|
A new configuration variable C<d_pseudofork> has been to F<Configure>, and is
|
|
available as C<$Config{d_pseudofork}> in the C<Config> module. This
|
|
distinguishes real C<fork> support from the pseudofork emulation used on
|
|
Windows platforms.
|
|
|
|
F<Config.pod> and F<config.sh> are now placed correctly for cross-compilation.
|
|
|
|
C<$Config{useshrplib}> is now 'true' rather than 'yes' when using a shared perl
|
|
library.
|
|
|
|
=head2 Compilation improvements
|
|
|
|
Parallel makes should work properly now, although there may still be problems
|
|
if C<make test> is instructed to run in parallel.
|
|
|
|
Many compilation warnings have been cleaned up. A very stubborn compiler
|
|
warning in C<S_emulate_eaccess()> was killed after six attempts.
|
|
F<g++> support has been tuned, especially for FreeBSD.
|
|
|
|
F<mkppport> has been integrated, and all F<ppport.h> files in the core will now
|
|
be autogenerated at build time (and removed during cleanup).
|
|
|
|
=head2 Installation improvements.
|
|
|
|
F<installman> now works with C<-Duserelocatableinc> and C<DESTDIR>.
|
|
|
|
F<installperl> no longer installs:
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
static library files of statically linked extensions when a shared perl library
|
|
is being used. (They are not needed. See L</Windows> below).
|
|
|
|
=item *
|
|
|
|
F<SIGNATURE> and F<PAUSE*.pub> (CPAN files)
|
|
|
|
=item *
|
|
|
|
F<NOTES> and F<PATCHING> (ExtUtils files)
|
|
|
|
=item *
|
|
|
|
F<perlld> and F<ld2> (Cygwin files)
|
|
|
|
=back
|
|
|
|
=head2 Platform Specific Changes
|
|
|
|
There are improved hints for AIX, Cygwin, DEC/OSF, FreeBSD, HP/UX, Irix 6
|
|
Linux, MachTen, NetBSD, OS/390, QNX, SCO, Solaris, SunOS, System V Release 5.x
|
|
(UnixWare 7, OpenUNIX 8), Ultrix, UMIPS, uts and VOS.
|
|
|
|
=head3 FreeBSD
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Drop C<-std=c89> and C<-ansi> if using C<long long> as the main integral type,
|
|
else in FreeBSD 6.2 (and perhaps other releases), system headers do not
|
|
declare some functions required by perl.
|
|
|
|
=back
|
|
|
|
=head3 Solaris
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Starting with Solaris 10, we do not want versioned shared libraries, because
|
|
those often indicate a private use only library. These problems could often
|
|
be triggered when L<SUNWbdb> (Berkeley DB) was installed. Hence if Solaris 10
|
|
is detected set C<ignore_versioned_solibs=y>.
|
|
|
|
=back
|
|
|
|
=head3 VMS
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Allow IEEE math to be deselected on OpenVMS I64 (but it remains the default).
|
|
|
|
=item *
|
|
|
|
Record IEEE usage in C<config.h>
|
|
|
|
=item *
|
|
|
|
Help older VMS compilers by using C<ccflags> when building C<munchconfig.exe>.
|
|
|
|
=item *
|
|
|
|
Don't try to build old C<Thread> extension on VMS when C<-Duseithreads> has
|
|
been chosen.
|
|
|
|
=item *
|
|
|
|
Passing a raw string of "NaN" to F<nawk> causes a core dump - so the string
|
|
has been changed to "*NaN*"
|
|
|
|
=item *
|
|
|
|
F<t/op/stat.t> tests will now test hard links on VMS if they are supported.
|
|
|
|
=back
|
|
|
|
=head3 Windows
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
When using a shared perl library F<installperl> no longer installs static
|
|
library files, import library files and export library files (of statically
|
|
linked extensions) and empty bootstrap files (of dynamically linked
|
|
extensions). This fixes a problem building PAR-Packer on Win32 with a debug
|
|
build of perl.
|
|
|
|
=item *
|
|
|
|
Various improvements to the win32 build process, including support for Visual
|
|
C++ 2005 Express Edition (aka Visual C++ 8.x).
|
|
|
|
=item *
|
|
|
|
F<perl.exe> will now have an icon if built with MinGW or Borland.
|
|
|
|
=item *
|
|
|
|
Improvements to the perl-static.exe build process.
|
|
|
|
=item *
|
|
|
|
Add Win32 makefile option to link all extensions statically.
|
|
|
|
=item *
|
|
|
|
The F<WinCE> directory has been merged into the F<Win32> directory.
|
|
|
|
=item *
|
|
|
|
C<setlocale> tests have been re-enabled for Windows XP onwards.
|
|
|
|
=back
|
|
|
|
=head1 Selected Bug Fixes
|
|
|
|
=head2 Unicode
|
|
|
|
Many many bugs related to the internal Unicode implementation (UTF-8) have
|
|
been fixed. In particular, long standing bugs related to returning Unicode
|
|
via C<tie>, overloading or C<$@> are now gone, some of which were never
|
|
reported.
|
|
|
|
C<unpack> will internally convert the string back from UTF-8 on numeric types.
|
|
This is a compromise between the full consistency now in 5.10, and the current
|
|
behaviour, which is often used as a "feature" on string types.
|
|
|
|
Using C<:crlf> and C<UTF-16> IO layers together will now work.
|
|
|
|
Fixed problems with C<split>, Unicode C</\s+/> and C</ \0/>.
|
|
|
|
Fixed bug RT #40641 - encoding of Unicode characters in regular expressions.
|
|
|
|
Fixed a bug where using certain patterns in a regexp led to a panic.
|
|
[RT #45337]
|
|
|
|
Perl no longer segfaults (due to infinite internal recursion) if the locale's
|
|
character is not UTF-8 [RT #41442]:
|
|
|
|
use open ':locale';
|
|
print STDERR "\x{201e}"; # „
|
|
|
|
=head2 PerlIO
|
|
|
|
Inconsistencies have been fixed in the reference counting PerlIO uses to keep
|
|
track of Unix file descriptors, and the API used by XS code to manage getting
|
|
and releasing C<FILE *>s
|
|
|
|
=head2 Magic
|
|
|
|
Several bugs have been fixed in Magic, the internal system used to implement
|
|
features such as C<tie>, tainting and threads sharing.
|
|
|
|
C<undef @array> on a tied array now correctly calls the C<CLEAR> method.
|
|
|
|
Some of the bitwise ops were not checking whether their arguments were magical
|
|
before using them. [RT #24816]
|
|
|
|
Magic is no longer invoked twice by the expression C<\&$x>
|
|
|
|
A bug with assigning large numbers and tainting has been resolved.
|
|
[RT #40708]
|
|
|
|
A new entry has been added to the MAGIC vtable - C<svt_local>. This is used
|
|
when copying magic to the new value during C<local>, allowing certain problems
|
|
with localising shared variables to be resolved.
|
|
|
|
For the implementation details, see L<perlguts/Magic Virtual Tables>.
|
|
|
|
=head2 Reblessing overloaded objects now works
|
|
|
|
Internally, perl object-ness is on the referent, not the reference, even
|
|
though methods can only be called via a reference. However, the original
|
|
implementation of overloading stored flags related to overloading on the
|
|
reference, relying on the flags being copied when the reference was copied,
|
|
or set at the creation of a new reference. This manifests in a bug - if you
|
|
rebless an object from a class that has overloading, into one that does not,
|
|
then any other existing references think that they (still) point to an
|
|
overloaded object, choose these C code paths, and then throw errors.
|
|
Analogously, blessing into an overloaded class when other references exist will
|
|
result in them not using overloading.
|
|
|
|
The implementation has been fixed for 5.10, but this fix changes the semantics
|
|
of flag bits, so is not binary compatible, so can't be applied to 5.8.9.
|
|
However, 5.8.9 has a work-around that implements the same bug fix. If the
|
|
referent has multiple references, then all the other references are located and
|
|
corrected. A full search is avoided whenever possible by scanning lexicals
|
|
outwards from the current subroutine, and the argument stack.
|
|
|
|
A certain well known Linux vendor applied incomplete versions of this bug fix
|
|
to their F</usr/bin/perl> and then prematurely closed bug reports about
|
|
performance issues without consulting back upstream. This not being enough,
|
|
they then proceeded to ignore the necessary fixes to these unreleased changes
|
|
for 11 months, until massive pressure was applied by their long-suffering
|
|
paying customers, catalysed by the failings being featured on a prominent blog
|
|
and Slashdot.
|
|
|
|
=head2 C<strict> now propagates correctly into string evals
|
|
|
|
Under 5.8.8 and earlier:
|
|
|
|
$ perl5.8.8 -e 'use strict; eval "use foo bar" or die $@'
|
|
Can't locate foo.pm in @INC (@INC contains: ... .) at (eval 1) line 2.
|
|
BEGIN failed--compilation aborted at (eval 1) line 2.
|
|
|
|
Under 5.8.9 and later:
|
|
|
|
$ perl5.8.9 -e 'use strict; eval "use foo bar" or die $@'
|
|
Bareword "bar" not allowed while "strict subs" in use at (eval 1) line 1.
|
|
|
|
This may cause problems with programs that parse the error message and rely
|
|
on the buggy behaviour.
|
|
|
|
=head2 Other fixes
|
|
|
|
=over
|
|
|
|
=item *
|
|
|
|
The tokenizer no longer treats C<=cute> (and other words beginning
|
|
with C<=cut>) as a synonym for C<=cut>.
|
|
|
|
=item *
|
|
|
|
Calling C<CORE::require>
|
|
|
|
C<CORE::require> and C<CORE::do> were always parsed as C<require> and C<do>
|
|
when they were overridden. This is now fixed.
|
|
|
|
=item *
|
|
|
|
Stopped memory leak on long F</etc/groups> entries.
|
|
|
|
=item *
|
|
|
|
C<while (my $x ...) { ...; redo }> shouldn't C<undef $x>.
|
|
|
|
In the presence of C<my> in the conditional of a C<while()>, C<until()>,
|
|
or C<for(;;)> loop, we now add an extra scope to the body so that C<redo>
|
|
doesn't C<undef> the lexical.
|
|
|
|
=item *
|
|
|
|
The C<encoding> pragma now correctly ignores anything following an C<@>
|
|
character in the C<LC_ALL> and C<LANG> environment variables. [RT # 49646]
|
|
|
|
=item *
|
|
|
|
A segfault observed with some F<gcc> 3.3 optimisations is resolved.
|
|
|
|
=item *
|
|
|
|
A possible segfault when C<unpack> used in scalar context with C<()> groups
|
|
is resolved. [RT #50256]
|
|
|
|
=item *
|
|
|
|
Resolved issue where C<$!> could be changed by a signal handler interrupting
|
|
a C<system> call.
|
|
|
|
=item *
|
|
|
|
Fixed bug RT #37886, symbolic dereferencing was allowed in the argument of
|
|
C<defined> even under the influence of C<use strict 'refs'>.
|
|
|
|
=item *
|
|
|
|
Fixed bug RT #43207, where C<lc>/C<uc> inside C<sort> affected the return
|
|
value.
|
|
|
|
=item *
|
|
|
|
Fixed bug RT #45607, where C<*{"BONK"} = \&{"BONK"}> didn't work correctly.
|
|
|
|
=item *
|
|
|
|
Fixed bug RT #35878, croaking from a XSUB called via C<goto &xsub> corrupts perl
|
|
internals.
|
|
|
|
=item *
|
|
|
|
Fixed bug RT #32539, F<DynaLoader.o> is moved into F<libperl.so> to avoid the
|
|
need to statically link DynaLoader into the stub perl executable. With this
|
|
F<libperl.so> provides everything needed to get a functional embedded perl
|
|
interpreter to run.
|
|
|
|
=item *
|
|
|
|
Fix bug RT #36267 so that assigning to a tied hash doesn't change the
|
|
underlying hash.
|
|
|
|
=item *
|
|
|
|
Fix bug RT #6006, regexp replaces using large replacement variables
|
|
fail some of the time, I<i.e.> when substitution contains something
|
|
like C<${10}> (note the bracket) instead of just C<$10>.
|
|
|
|
=item *
|
|
|
|
Fix bug RT #45053, C<Perl_newCONSTSUB()> is now thread safe.
|
|
|
|
=back
|
|
|
|
=head2 Platform Specific Fixes
|
|
|
|
=head3 Darwin / MacOS X
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Various improvements to 64 bit builds.
|
|
|
|
=item *
|
|
|
|
Mutex protection added in C<PerlIOStdio_close()> to avoid race conditions.
|
|
Hopefully this fixes failures in the threads tests F<free.t> and F<blocks.t>.
|
|
|
|
=item *
|
|
|
|
Added forked terminal support to the debugger, with the ability to update the
|
|
window title.
|
|
|
|
=back
|
|
|
|
=head3 OS/2
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
A build problem with specifying C<USE_MULTI> and C<USE_ITHREADS> but without
|
|
C<USE_IMP_SYS> has been fixed.
|
|
|
|
=item *
|
|
|
|
C<OS2::REXX> upgraded to version 1.04
|
|
|
|
=back
|
|
|
|
=head3 Tru64
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Aligned floating point build policies for F<cc> and F<gcc>.
|
|
|
|
=back
|
|
|
|
=head3 RedHat Linux
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Revisited a patch from 5.6.1 for RH7.2 for Intel's F<icc> [RT #7916], added an
|
|
additional check for C<$Config{gccversion}>.
|
|
|
|
=back
|
|
|
|
=head3 Solaris/i386
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Use C<-DPTR_IS_LONG> when using 64 bit integers
|
|
|
|
=back
|
|
|
|
=head3 VMS
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Fixed C<PerlIO::Scalar> in-memory file record-style reads.
|
|
|
|
=item *
|
|
|
|
pipe shutdown at process exit should now be more robust.
|
|
|
|
=item *
|
|
|
|
Bugs in VMS exit handling tickled by C<Test::Harness> 2.64 have been fixed.
|
|
|
|
=item *
|
|
|
|
Fix C<fcntl()> locking capability test in F<configure.com>.
|
|
|
|
=item *
|
|
|
|
Replaced C<shrplib='define'> with C<useshrplib='true'> on VMS.
|
|
|
|
=back
|
|
|
|
=head3 Windows
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
C<File::Find> used to fail when the target directory is a bare drive letter and
|
|
C<no_chdir> is 1 (the default is 0). [RT #41555]
|
|
|
|
=item *
|
|
|
|
A build problem with specifying C<USE_MULTI> and C<USE_ITHREADS> but without
|
|
C<USE_IMP_SYS> has been fixed.
|
|
|
|
=item *
|
|
|
|
The process id is no longer truncated to 16 bits on some Windows platforms
|
|
( http://bugs.activestate.com/show_bug.cgi?id=72443 )
|
|
|
|
=item *
|
|
|
|
Fixed bug RT #54828 in F<perlio.c> where calling C<binmode> on Win32 and Cygwin
|
|
may cause a segmentation fault.
|
|
|
|
=back
|
|
|
|
=head2 Smaller fixes
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
It is now possible to overload C<eq> when using C<nomethod>.
|
|
|
|
=item *
|
|
|
|
Various problems using C<overload> with 64 bit integers corrected.
|
|
|
|
=item *
|
|
|
|
The reference count of C<PerlIO> file descriptors is now correctly handled.
|
|
|
|
=item *
|
|
|
|
On VMS, escaped dots will be preserved when converted to Unix syntax.
|
|
|
|
=item *
|
|
|
|
C<keys %+> no longer throws an C<'ambiguous'> warning.
|
|
|
|
=item *
|
|
|
|
Using C<#!perl -d> could trigger an assertion, which has been fixed.
|
|
|
|
=item *
|
|
|
|
Don't stringify tied code references in C<@INC> when calling C<require>.
|
|
|
|
=item *
|
|
|
|
Code references in C<@INC> report the correct file name when C<__FILE__> is
|
|
used.
|
|
|
|
=item *
|
|
|
|
Width and precision in sprintf didn't handle characters above 255 correctly.
|
|
[RT #40473]
|
|
|
|
=item *
|
|
|
|
List slices with indices out of range now work more consistently.
|
|
[RT #39882]
|
|
|
|
=item *
|
|
|
|
A change introduced with perl 5.8.1 broke the parsing of arguments of the form
|
|
C<-foo=bar> with the C<-s> on the <#!> line. This has been fixed. See
|
|
http://bugs.activestate.com/show_bug.cgi?id=43483
|
|
|
|
=item *
|
|
|
|
C<tr///> is now threadsafe. Previously it was storing a swash inside its OP,
|
|
rather than in a pad.
|
|
|
|
=item *
|
|
|
|
F<pod2html> labels anchors more consistently and handles nested definition
|
|
lists better.
|
|
|
|
=item *
|
|
|
|
C<threads> cleanup veto has been extended to include C<perl_free()> and
|
|
C<perl_destruct()>
|
|
|
|
=item *
|
|
|
|
On some systems, changes to C<$ENV{TZ}> would not always be
|
|
respected by the underlying calls to C<localtime_r()>. Perl now
|
|
forces the inspection of the environment on these systems.
|
|
|
|
=item *
|
|
|
|
The special variable C<$^R> is now more consistently set when executing
|
|
regexps using the C<(?{...})> construct. In particular, it will still
|
|
be set even if backreferences or optional sub-patterns C<(?:...)?> are
|
|
used.
|
|
|
|
=back
|
|
|
|
=head1 New or Changed Diagnostics
|
|
|
|
=head2 panic: sv_chop %s
|
|
|
|
This new fatal error occurs when the C routine C<Perl_sv_chop()> was passed a
|
|
position that is not within the scalar's string buffer. This is caused by
|
|
buggy XS code, and at this point recovery is not possible.
|
|
|
|
=head2 Maximal count of pending signals (%s) exceeded
|
|
|
|
This new fatal error occurs when the perl process has to abort due to
|
|
too many pending signals, which is bound to prevent perl from being
|
|
able to handle further incoming signals safely.
|
|
|
|
=head2 panic: attempt to call %s in %s
|
|
|
|
This new fatal error occurs when the ACL version file test operator is used
|
|
where it is not available on the current platform. Earlier checks mean that
|
|
it should never be possible to get this.
|
|
|
|
=head2 FETCHSIZE returned a negative value
|
|
|
|
New error indicating that a tied array has claimed to have a negative
|
|
number of elements.
|
|
|
|
=head2 Can't upgrade %s (%d) to %d
|
|
|
|
Previously the internal error from the SV upgrade code was the less informative
|
|
I<Can't upgrade that kind of scalar>. It now reports the current internal type,
|
|
and the new type requested.
|
|
|
|
=head2 %s argument is not a HASH or ARRAY element or a subroutine
|
|
|
|
This error, thrown if an invalid argument is provided to C<exists> now
|
|
correctly includes "or a subroutine". [RT #38955]
|
|
|
|
=head2 Cannot make the non-overridable builtin %s fatal
|
|
|
|
This error in C<Fatal> previously did not show the name of the builtin in
|
|
question (now represented by %s above).
|
|
|
|
=head2 Unrecognized character '%s' in column %d
|
|
|
|
This error previously did not state the column.
|
|
|
|
=head2 Offset outside string
|
|
|
|
This can now also be generated by a C<seek> on a file handle using
|
|
C<PerlIO::scalar>.
|
|
|
|
=head2 Invalid escape in the specified encoding in regexp; marked by <-- HERE in m/%s/
|
|
|
|
New error, introduced as part of the fix to RT #40641 to handle encoding
|
|
of Unicode characters in regular expression comments.
|
|
|
|
=head2 Your machine doesn't support dump/undump.
|
|
|
|
A more informative fatal error issued when calling C<dump> on Win32 and
|
|
Cygwin. (Given that the purpose of C<dump> is to abort with a core dump,
|
|
and core dumps can't be produced on these platforms, this is more useful than
|
|
silently exiting.)
|
|
|
|
=head1 Changed Internals
|
|
|
|
The perl sources can now be compiled with a C++ compiler instead of a C
|
|
compiler. A necessary implementation details is that under C++, the macro
|
|
C<XS> used to define XSUBs now includes an C<extern "C"> definition. A side
|
|
effect of this is that B<C++> code that used the construction
|
|
|
|
typedef XS(SwigPerlWrapper);
|
|
|
|
now needs to be written
|
|
|
|
typedef XSPROTO(SwigPerlWrapper);
|
|
|
|
using the new C<XSPROTO> macro, in order to compile. C extensions are
|
|
unaffected, although C extensions are encouraged to use C<XSPROTO> too.
|
|
This change was present in the 5.10.0 release of perl, so any actively
|
|
maintained code that happened to use this construction should already have
|
|
been adapted. Code that needs changing will fail with a compilation error.
|
|
|
|
C<set> magic on localizing/assigning to a magic variable will now only
|
|
trigger for I<container magics>, i.e. it will for C<%ENV> or C<%SIG>
|
|
but not for C<$#array>.
|
|
|
|
The new API macro C<newSVpvs()> can be used in place of constructions such as
|
|
C<newSVpvn("ISA", 3)>. It takes a single string constant, and at C compile
|
|
time determines its length.
|
|
|
|
The new API function C<Perl_newSV_type()> can be used as a more efficient
|
|
replacement of the common idiom
|
|
|
|
sv = newSV(0);
|
|
sv_upgrade(sv, type);
|
|
|
|
Similarly C<Perl_newSVpvn_flags()> can be used to combine
|
|
C<Perl_newSVpv()> with C<Perl_sv_2mortal()> or the equivalent
|
|
C<Perl_sv_newmortal()> with C<Perl_sv_setpvn()>
|
|
|
|
Two new macros C<mPUSHs()> and C<mXPUSHs()> are added, to make it easier to
|
|
push mortal SVs onto the stack. They were then used to fix several bugs where
|
|
values on the stack had not been mortalised.
|
|
|
|
A C<Perl_signbit()> function was added to test the sign of an C<NV>. It
|
|
maps to the system one when available.
|
|
|
|
C<Perl_av_reify()>, C<Perl_lex_end()>, C<Perl_mod()>, C<Perl_op_clear()>,
|
|
C<Perl_pop_return()>, C<Perl_qerror()>, C<Perl_setdefout()>,
|
|
C<Perl_vivify_defelem()> and C<Perl_yylex()> are now visible to extensions.
|
|
This was required to allow C<Data::Alias> to work on Windows.
|
|
|
|
C<Perl_find_runcv()> is now visible to perl core extensions. This was required
|
|
to allow C<Sub::Current> to work on Windows.
|
|
|
|
C<ptr_table*> functions are now available in unthreaded perl. C<Storable>
|
|
takes advantage of this.
|
|
|
|
There have been many small cleanups made to the internals. In particular,
|
|
C<Perl_sv_upgrade()> has been simplified considerably, with a straight-through
|
|
code path that uses C<memset()> and C<memcpy()> to initialise the new body,
|
|
rather than assignment via multiple temporary variables. It has also
|
|
benefited from simplification and de-duplication of the arena management
|
|
code.
|
|
|
|
A lot of small improvements in the code base were made due to reports from
|
|
the Coverity static code analyzer.
|
|
|
|
Corrected use and documentation of C<Perl_gv_stashpv()>, C<Perl_gv_stashpvn()>,
|
|
C<Perl_gv_stashsv()> functions (last parameter is a bitmask, not boolean).
|
|
|
|
C<PERL_SYS_INIT>, C<PERL_SYS_INIT3> and C<PERL_SYS_TERM> macros have been
|
|
changed into functions.
|
|
|
|
C<PERLSYS_TERM> no longer requires a context. C<PerlIO_teardown()>
|
|
is now called without a context, and debugging output in this function has
|
|
been disabled because that required that an interpreter was present, an invalid
|
|
assumption at termination time.
|
|
|
|
All compile time options which affect binary compatibility have been grouped
|
|
together into a global variable (C<PL_bincompat_options>).
|
|
|
|
The values of C<PERL_REVISION>, C<PERL_VERSION> and C<PERL_SUBVERSION> are
|
|
now baked into global variables (and hence into any shared perl library).
|
|
Additionally under C<MULTIPLICITY>, the perl executable now records the size of
|
|
the interpreter structure (total, and for this version). Coupled with
|
|
C<PL_bincompat_options> this will allow 5.8.10 (and later), when compiled with a
|
|
shared perl library, to perform sanity checks in C<main()> to verify that the
|
|
shared library is indeed binary compatible.
|
|
|
|
Symbolic references can now have embedded NULs. The new public function
|
|
C<Perl_get_cvn_flags()> can be used in extensions if you have to handle them.
|
|
|
|
=head2 Macro cleanups
|
|
|
|
The core code, and XS code in F<ext> that is not dual-lived on CPAN, no longer
|
|
uses the macros C<PL_na>, C<NEWSV()>, C<Null()>, C<Nullav>, C<Nullcv>,
|
|
C<Nullhv>, C<Nullhv> I<etc>. Their use is discouraged in new code,
|
|
particularly C<PL_na>, which is a small performance hit.
|
|
|
|
=head1 New Tests
|
|
|
|
Many modules updated from CPAN incorporate new tests. Some core specific
|
|
tests have been added:
|
|
|
|
=over 4
|
|
|
|
=item ext/DynaLoader/t/DynaLoader.t
|
|
|
|
Tests for the C<DynaLoader> module.
|
|
|
|
=item t/comp/fold.t
|
|
|
|
Tests for compile-time constant folding.
|
|
|
|
=item t/io/pvbm.t
|
|
|
|
Tests incorporated from 5.10.0 which check that there is no unexpected
|
|
interaction between the internal types C<PVBM> and C<PVGV>.
|
|
|
|
=item t/lib/proxy_constant_subs.t
|
|
|
|
Tests for the new form of constant subroutines.
|
|
|
|
=item t/op/attrhand.t
|
|
|
|
Tests for C<Attribute::Handlers>.
|
|
|
|
=item t/op/dbm.t
|
|
|
|
Tests for C<dbmopen>.
|
|
|
|
=item t/op/inccode-tie.t
|
|
|
|
Calls all tests in F<t/op/inccode.t> after first tying C<@INC>.
|
|
|
|
=item t/op/incfilter.t
|
|
|
|
Tests for source filters returned from code references in C<@INC>.
|
|
|
|
=item t/op/kill0.t
|
|
|
|
Tests for RT #30970.
|
|
|
|
=item t/op/qrstack.t
|
|
|
|
Tests for RT #41484.
|
|
|
|
=item t/op/qr.t
|
|
|
|
Tests for the C<qr//> construct.
|
|
|
|
=item t/op/regexp_qr_embed.t
|
|
|
|
Tests for the C<qr//> construct within another regexp.
|
|
|
|
=item t/op/regexp_qr.t
|
|
|
|
Tests for the C<qr//> construct.
|
|
|
|
=item t/op/rxcode.t
|
|
|
|
Tests for RT #32840.
|
|
|
|
=item t/op/studytied.t
|
|
|
|
Tests for C<study> on tied scalars.
|
|
|
|
=item t/op/substT.t
|
|
|
|
Tests for C<subst> run under C<-T> mode.
|
|
|
|
=item t/op/symbolcache.t
|
|
|
|
Tests for C<undef> and C<delete> on stash entries that are bound to
|
|
subroutines or methods.
|
|
|
|
=item t/op/upgrade.t
|
|
|
|
Tests for C<Perl_sv_upgrade()>.
|
|
|
|
=item t/mro/package_aliases.t
|
|
|
|
MRO tests for C<isa> and package aliases.
|
|
|
|
=item t/pod/twice.t
|
|
|
|
Tests for calling C<Pod::Parser> twice.
|
|
|
|
=item t/run/cloexec.t
|
|
|
|
Tests for inheriting file descriptors across C<exec> (close-on-exec).
|
|
|
|
=item t/uni/cache.t
|
|
|
|
Tests for the UTF-8 caching code.
|
|
|
|
=item t/uni/chr.t
|
|
|
|
Test that strange encodings do not upset C<Perl_pp_chr()>.
|
|
|
|
=item t/uni/greek.t
|
|
|
|
Tests for RT #40641.
|
|
|
|
=item t/uni/latin2.t
|
|
|
|
Tests for RT #40641.
|
|
|
|
=item t/uni/overload.t
|
|
|
|
Tests for returning Unicode from overloaded values.
|
|
|
|
=item t/uni/tie.t
|
|
|
|
Tests for returning Unicode from tied variables.
|
|
|
|
=back
|
|
|
|
=head1 Known Problems
|
|
|
|
There are no known new bugs.
|
|
|
|
However, programs that rely on bugs that have been fixed will have problems.
|
|
Also, many bug fixes present in 5.10.0 can't be back-ported to the 5.8.x
|
|
branch, because they require changes that are binary incompatible, or because
|
|
the code changes are too large and hence too risky to incorporate.
|
|
|
|
We have only limited volunteer labour, and the maintenance burden is
|
|
getting increasingly complex. Hence this will be the last significant
|
|
release of the 5.8.x series. Any future releases of 5.8.x will likely
|
|
only be to deal with security issues, and platform build
|
|
failures. Hence you should look to migrating to 5.10.x, if you have
|
|
not started already. Alternatively, if business requirements constrain
|
|
you to continue to use 5.8.x, you may wish to consider commercial
|
|
support from firms such as ActiveState.
|
|
|
|
=head1 Platform Specific Notes
|
|
|
|
=head2 Win32
|
|
|
|
C<readdir()>, C<cwd()>, C<$^X> and C<@INC> now use the alternate (short)
|
|
filename if the long name is outside the current codepage (Jan Dubois).
|
|
|
|
=head3 Updated Modules
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
C<Win32> upgraded to version 0.38. Now has a documented 'WinVista' response
|
|
from C<GetOSName> and support for Vista's privilege elevation in C<IsAdminUser>.
|
|
Support for Unicode characters in path names. Improved cygwin and Win64
|
|
compatibility.
|
|
|
|
=item *
|
|
|
|
C<Win32API> updated to 0.1001_01
|
|
|
|
=item *
|
|
|
|
C<killpg()> support added to C<MSWin32> (Jan Dubois).
|
|
|
|
=item *
|
|
|
|
C<File::Spec::Win32> upgraded to version 3.2701
|
|
|
|
=back
|
|
|
|
=head2 OS/2
|
|
|
|
=head3 Updated Modules
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
C<OS2::Process> upgraded to 1.03
|
|
|
|
Ilya Zakharevich has added and documented several C<Window*> and C<Clipbrd*>
|
|
functions.
|
|
|
|
=item *
|
|
|
|
C<OS2::REXX::DLL>, C<OS2::REXX> updated to version 1.03
|
|
|
|
=back
|
|
|
|
=head2 VMS
|
|
|
|
=head3 Updated Modules
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
C<DCLsym> upgraded to version 1.03
|
|
|
|
=item *
|
|
|
|
C<Stdio> upgraded to version 2.4
|
|
|
|
=item *
|
|
|
|
C<VMS::XSSymSet> upgraded to 1.1.
|
|
|
|
=back
|
|
|
|
=head1 Obituary
|
|
|
|
Nick Ing-Simmons, long time Perl hacker, author of the C<Tk> and C<Encode>
|
|
modules, F<perlio.c> in the core, and 5.003_02 pumpking, died of a heart
|
|
attack on 25th September 2006. He will be missed.
|
|
|
|
=head1 Acknowledgements
|
|
|
|
Some of the work in this release was funded by a TPF grant.
|
|
|
|
Steve Hay worked behind the scenes working out the causes of the differences
|
|
between core modules, their CPAN releases, and previous core releases, and
|
|
the best way to rectify them. He doesn't want to do it again. I know this
|
|
feeling, and I'm very glad he did it this time, instead of me.
|
|
|
|
Paul Fenwick assembled a team of 18 volunteers, who broke the back of writing
|
|
this document. In particular, Bradley Dean, Eddy Tan, and Vincent Pit
|
|
provided half the team's contribution.
|
|
|
|
Schwern verified the list of updated module versions, correcting quite a few
|
|
errors that I (and everyone else) had missed, both wrongly stated module
|
|
versions, and changed modules that had not been listed.
|
|
|
|
The crack Berlin-based QA team of Andreas KE<ouml>nig and Slaven Rezic
|
|
tirelessly re-built snapshots, tested most everything CPAN against
|
|
them, and then identified the changes responsible for any module regressions,
|
|
ensuring that several show-stopper bugs were stomped before the first release
|
|
candidate was cut.
|
|
|
|
The other core committers contributed most of the changes, and applied most
|
|
of the patches sent in by the hundreds of contributors listed in F<AUTHORS>.
|
|
|
|
And obviously, Larry Wall, without whom we wouldn't have Perl.
|
|
|
|
=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://bugs.perl.org. 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. You can browse and search
|
|
the Perl 5 bugs at http://bugs.perl.org/
|
|
|
|
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 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 security
|
|
issues in the Perl core, not for modules independently distributed on CPAN.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
The F<Changes> file for 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
|