diff options
Diffstat (limited to 'pod/perldelta.pod')
| -rw-r--r-- | pod/perldelta.pod | 400 |
1 files changed, 189 insertions, 211 deletions
diff --git a/pod/perldelta.pod b/pod/perldelta.pod index cad0892fc7..1493551e23 100644 --- a/pod/perldelta.pod +++ b/pod/perldelta.pod @@ -2,405 +2,383 @@ =head1 NAME -perldelta - what is new for perl v5.23.7 +[ 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 v5.23.8 =head1 DESCRIPTION -This document describes differences between the 5.23.6 release and the 5.23.7 +This document describes differences between the 5.23.7 release and the 5.23.8 release. -If you are upgrading from an earlier release such as 5.23.5, first read -L<perl5236delta>, which describes differences between 5.23.5 and 5.23.6. - -=head1 Core Enhancements +If you are upgrading from an earlier release such as 5.23.6, first read +L<perl5237delta>, which describes differences between 5.23.6 and 5.23.7. -=head2 New C<\b{lb}> boundary in regular expressions +=head1 Notice -C<lb> stands for Line Break. It is a Unicode property -that determines where a line of text is suitable to break (typically so -that it can be output without overflowing the available horizontal -space). This capability has long been furnished by the -L<Unicode::LineBreak> module, but now a light-weight, non-customizable -version that is suitable for many purposes is in core Perl. +XXX Any important notices here -=head1 Security - -=head2 fix out of boundary access in Win32 path handling +=head1 Core Enhancements -This is CVE-2015-8608. For more information see -L<[perl #126755]|https://rt.perl.org/Ticket/Display.html?id=126755> +XXX New core language features go here. Summarize user-visible core language +enhancements. Particularly prominent performance optimisations could go +here, but most should go in the L</Performance Enhancements> section. -=head2 fix loss of taint in canonpath +[ List each enhancement as a =head2 entry ] -This is CVE-2015-8607. For more information see -L<[perl #126862]|https://rt.perl.org/Ticket/Display.html?id=126862> +=head1 Security -=head2 Avoid accessing uninitialized memory in win32 C<crypt()> +XXX Any security-related notices go here. In particular, any security +vulnerabilities closed should be noted here rather than in the +L</Selected Bug Fixes> section. -Added validation that will detect both a short salt and invalid characters -in the salt. L<[perl #126922]|https://rt.perl.org/Ticket/Display.html?id=126922> +[ List each security issue as a =head2 entry ] =head1 Incompatible Changes -=head2 C<qr/\b{wb}/> is now tailored to Perl expectations +XXX For a release on a stable branch, this section aspires to be: -This is now more suited to be a drop-in replacement for plain C<\b>, but -giving better results for parsing natural language. Previously it -strictly followed the current Unicode rules which calls for it to match -between each white space character. Now it doesn't generally match -within spans of white space, behaving like C<\b> does. See -L<perlrebackslash/\b{wb}> + There are no changes intentionally incompatible with 5.XXX.XXX + If any exist, they are bugs, and we request that you submit a + report. See L</Reporting Bugs> below. -=head1 Modules and Pragmata +[ List each incompatible change as a =head2 entry ] -=head2 Updated Modules and Pragmata +=head1 Deprecations -=over 4 +XXX Any deprecated features, syntax, modules etc. should be listed here. -=item * - -The F<cpan/podlators/> bundle has been upgraded from version 2.28 to 4.04. - -=item * +=head2 Module removals -L<B> has been upgraded from version 1.61 to 1.62. +XXX Remove this section if inapplicable. -=item * +The following modules will be removed from the core distribution in a +future release, and will at that time need to be installed from CPAN. +Distributions on CPAN which require these modules will need to list them as +prerequisites. -L<B::Deparse> has been upgraded from version 1.36 to 1.37. +The core versions of these modules will now issue C<"deprecated">-category +warnings to alert you to this fact. To silence these deprecation warnings, +install the modules in question from CPAN. -=item * +Note that these are (with rare exceptions) fine modules that you are encouraged +to continue to use. Their disinclusion from core primarily hinges on their +necessity to bootstrapping a fully functional, CPAN-capable Perl installation, +not usually on concerns over their design. -L<Benchmark> has been upgraded from version 1.21 to 1.22. +=over -=item * +=item XXX -L<bignum> has been upgraded from version 0.41 to 0.42. +XXX Note that deprecated modules should be listed here even if they are listed +as an updated module in the L</Modules and Pragmata> section. -=item * +=back -L<Data::Dumper> has been upgraded from version 2.159 to 2.160. +[ List each other deprecation as a =head2 entry ] -=item * +=head1 Performance Enhancements -L<ExtUtils::ParseXS> has been upgraded from version 3.30 to 3.31. +XXX Changes which enhance performance without changing behaviour go here. +There may well be none in a stable release. -=item * +[ List each enhancement as a =item entry ] -L<ExtUtils::Typemaps> has been upgraded from version 3.30 to 3.31. +=over 4 =item * -L<File::Find> has been upgraded from version 1.32 to 1.33. +XXX -=item * +=back -L<File::Spec> has been upgraded from version 3.60 to 3.62. +=head1 Modules and Pragmata -=item * +XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> +go here. If Module::CoreList is updated, generate an initial draft of the +following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary +for important changes should then be added by hand. In an ideal world, +dual-life modules would have a F<Changes> file that could be cribbed. -L<Math::BigInt> has been upgraded from version 1.999710 to 1.999715. +[ Within each section, list entries as a =item entry ] -=item * +=head2 New Modules and Pragmata -L<Math::BigInt::FastCalc> has been upgraded from version 0.38 to 0.40. +=over 4 =item * -L<Math::BigRat> has been upgraded from version 0.260801 to 0.260802. +XXX -=item * - -L<Module::CoreList> has been upgraded from version 5.20151220 to 5.20160120. +=back -=item * +=head2 Updated Modules and Pragmata -L<Pod::Usage> has been upgraded from version 1.67 to 1.68. +=over 4 =item * -L<Test::Harness> has been upgraded from version 3.35 to 3.36. - -=item * +L<XXX> has been upgraded from version A.xx to B.yy. -L<Unicode::Normalize> has been upgraded from version 1.24 to 1.25. +=back -=item * +=head2 Removed Modules and Pragmata -L<Unicode::UCD> has been upgraded from version 0.63 to 0.64. +=over 4 =item * -L<utf8> has been upgraded from version 1.18 to 1.19. +XXX =back =head1 Documentation -=head2 Changes to Existing Documentation +XXX Changes to files in F<pod/> go here. Consider grouping entries by +file and be sure to link to the appropriate page, e.g. L<perlfunc>. -=head3 L<perlsyn> +=head2 New Documentation -=over 4 +XXX Changes which create B<new> files in F<pod/> go here. -=item * +=head3 L<XXX> -Fixed a broken example where C<=> was used instead of -C<==> in conditional in do/while example. +XXX Description of the purpose of the new file here -=back +=head2 Changes to Existing Documentation -=head3 L<perlfunc> +XXX Changes which significantly change existing files in F<pod/> go here. +However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> +section. + +=head3 L<XXX> =over 4 =item * -Better explain meaning of negative PIDs in C<waitpid>. -L<[perl #127080]|https://rt.perl.org/Ticket/Display.html?id=127080> +XXX Description of the change here =back -=head3 L<perlgit> - -=over 4 +=head1 Diagnostics -=item * +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>. -Move sample commands into verbatim paragraphs. +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. -=item * +=head2 New Diagnostics -Improve hyperlinks for all email addresses, RT tickets -and commit hashes. +XXX Newly added diagnostic messages go under here, separated into New Errors +and New Warnings -=item * +=head3 New Errors -Consistently refer to bisect.pl as F<Porting/bisect.pl> +=over 4 =item * -Miscellaneous grammar and POD fixes. +XXX L<message|perldiag/"message"> =back -=head3 L<perlreftut> +=head3 New Warnings =over 4 =item * -Fix some examples to be L<strict> clean. +XXX L<message|perldiag/"message"> =back -=head3 L<perlrebackslash> +=head2 Changes to Existing Diagnostics + +XXX Changes (i.e. rewording) of diagnostic messages go here =over 4 =item * -Clarify that in languages like Japanese and Thai, dictionary lookup -is required to determine word boundaries. +XXX Describe change here =back -=head1 Diagnostics +=head1 Utility Changes -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 Changes to installed programs such as F<perlbug> and F<xsubpp> go here. +Most of these are built within the directory F<utils>. -=head2 Changes to Existing Diagnostics +[ List utility changes as a =head2 entry for each utility and =item +entries for each change +Use L<XXX> with program names to get proper documentation linking. ] + +=head2 L<XXX> =over 4 =item * -Accessing the C<IO> part of a glob as C<FILEHANDLE> instead of C<IO> is no -longer deprecated. It is discouraged to encourage uniformity (so that, for -example, one can grep more easily) but it will not be removed. -L<[perl #127060]|https://rt.perl.org/Ticket/Display.html?id=127060> +XXX =back =head1 Configuration and Compilation +XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools +go here. Any other changes to the Perl build process should be listed here. +However, any platform-specific changes should be listed in the +L</Platform Support> section, instead. + +[ List changes as a =item entry ]. + =over 4 =item * -F<Configure> no longer probes for F<libnm> by default. Originally -this was the "New Math" library, but the name has been re-used by the -GNOME NetworkManager. -L<[perl #127131]|https://rt.perl.org/Ticket/Display.html?id=127131> +XXX -=item * +=back + +=head1 Testing + +XXX Any significant changes to the testing of a freshly built perl should be +listed here. Changes which create B<new> files in F<t/> go here as do any +large changes to the testing harness (e.g. when parallel testing was added). +Changes to existing files in F<t/> aren't worth summarizing, although the bugs +that they represent may be covered elsewhere. -No longer generate EBCDIC POSIX-BC tables. We don't believe anyone is -using Perl and POSIX-BC at this time, and by not generating these tables -it saves time during development, and makes the resulting tar ball smaller. +[ List each test improvement as a =item entry ] + +=over 4 =item * -The Win32 miniperl now has a real C<getcwd> which increases build performance -resulting in C<getcwd()> being 605x faster in Win32 miniperl. +XXX =back =head1 Platform Support -=head2 Platform-Specific Notes +XXX Any changes to platform support should be listed in the sections below. + +[ Within the sections, list each platform as a =item entry with specific +changes as paragraphs below it. ] + +=head2 New Platforms + +XXX List any platforms that this version of perl compiles on, that previous +versions did not. These will either be enabled by new files in the F<hints/> +directories, or new subdirectories and F<README> files at the top level of the +source tree. =over 4 -=item * +=item XXX-some-platform -On VMS, the math function prototypes in C<math.h> are now visible under C++. -Now building the POSIX extension with C++ will no longer crash. +XXX -=item * +=back -VMS has had C<setenv/unsetenv> since v7.0 (released in 1996), C<Perl_vmssetenv> -now always uses C<setenv/unsetenv>. +=head2 Discontinued Platforms -=item * +XXX List any platforms that this version of perl no longer compiles on. -Try more crypt algorithms in the tests, for OpenBSD. OpenBSD implements the -Blowfish algorithm, but not the MD5 one used by C<glibc>. Enhance the crypt and -taint tests to try both algorithms. If neither works, fall back to no algorithm. -The Blowfish salt is taken from the OpenBSD C<crypt(3)> page. +=over 4 -=item * +=item XXX-some-platform -Use the C<fdclose()> function from FreeBSD if it is available. -L<[perl #126847]|https://rt.perl.org/Ticket/Display.html?id=126847> +XXX =back -=head1 Internal Changes +=head2 Platform-Specific Notes + +XXX List any changes for specific platforms. This could include configuration +and compilation changes or changes in portability/compatibility. However, +changes within modules for platforms should generally be listed in the +L</Modules and Pragmata> section. =over 4 -=item * +=item XXX-some-platform -The obscure C<PL_timesbuf> variable, effectively a vestige of Perl 1, has -been removed. It was documented as deprecated in Perl 5.20, with a statement -that it would be removed early in the 5.21.x series; that has now finally -happened. -L<[perl #121351]|https://rt.perl.org/Ticket/Display.html?id=121351> +XXX -=item * +=back -Remove unwarranted assertion in C<Perl_newATTRSUB_x()>. If a stub subroutine -definition with a prototype has been seen, then any subsequent stub (or -definition) of the same subroutine with an attribute was causing an assertion -failure because of a null pointer. -L<[perl #126845]|https://rt.perl.org/Ticket/Display.html?id=126845> +=head1 Internal Changes -=item * +XXX Changes which affect the interface available to C<XS> code go here. Other +significant internal changes for future core maintainers should be noted as +well. + +[ List each change as a =item entry ] -Replace C<::> with C<__> in C<ExtUtils::ParseXS> like it's done for -parameters/return values. This is more consistent, and simplifies writing XS -code wrapping C++ classes into a nested Perl namespace (it requires only -a typedef for C<Foo__Bar> rather than two, one for C<Foo_Bar> and the other -for C<Foo::Bar>). +=over 4 =item * -Deprecate the C<to_utf8_case()> function, see -L<http://nntp.perl.org/group/perl.perl5.porters/233287>. +XXX =back =head1 Selected Bug Fixes -=over 4 - -=item * +XXX Important bug fixes in the core language are summarized here. Bug fixes in +files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. -A regression that allowed undeclared barewords in hash keys to work despite -strictures has been fixed. -L<[perl #126981]|https://rt.perl.org/Ticket/Display.html?id=126981> +[ List each fix as a =item entry ] -=item * - -Calls to the placeholder C<&PL_sv_yes> used internally when an C<import()> -or C<unimport()> method isn't found now correctly handle scalar context. -L<[perl #126042]|https://rt.perl.org/Ticket/Display.html?id=126042> +=over 4 =item * -Fixed some problems introduced in 5.23.2 with list assignment dealing -with magic and XS functions returning their arguments. -L<[perl #126633]|https://rt.perl.org/Ticket/Display.html?id=126633> +XXX -=item * - -Report more context when we see an array where we expect to see an -operator and avoid an assertion failure. -L<[perl #123737]|https://rt.perl.org/Ticket/Display.html?id=123737> +=back -=item * +=head1 Known Problems -Modifying an array that was previously a package C<@ISA> no longer -causes assertion failures or crashes. -L<[perl #123788]|https://rt.perl.org/Ticket/Display.html?id=123788> +XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any +tests that had to be C<TODO>ed for the release would be noted here. Unfixed +platform specific bugs also go here. -=item * +[ List each fix as a =item entry ] -Retain binary compatibility across plain and DEBUGGING perl builds. -L<[perl #127212]|https://rt.perl.org/Ticket/Display.html?id=127212> +=over 4 =item * -Avoid leaking memory when setting C<$ENV{foo}> on darwin. -L<[perl #126240]|https://rt.perl.org/Ticket/Display.html?id=126240> +XXX =back -=head1 Known Problems +=head1 Errata From Previous Releases =over 4 =item * -Statically building perl is not currently working due to a problem -related to multiple definitions of the C<cp1252_encoding> in the -C<Encode> module. +XXX Add anything here that we forgot to add, or were mistaken about, in +the perldelta of a previous release. =back -=head1 Acknowledgements - -Perl 5.23.7 represents approximately 4 weeks of development since Perl 5.23.6 -and contains approximately 87,000 lines of changes across 450 files from 21 -authors. +=head1 Obituary -Excluding auto-generated files, documentation and release tools, there were -approximately 67,000 lines of changes to 320 .pm, .t, .c and .h files. +XXX If any significant core contributor has died, we've added a short obituary +here. -Perl continues to flourish into its third decade thanks to a vibrant community -of users and developers. The following people are known to have contributed the -improvements that became Perl 5.23.7: - -Aaron Crane, Andreas König, Andy Dougherty, Chris 'BinGOs' Williams, Craig A. -Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, David Golden, David Mitchell, -James E Keenan, Jarkko Hietaniemi, Karen Etheridge, Karl Williamson, Lukas Mai, -Mattia Barbon, Ricardo Signes, Stevan Little, Steve Hay, Todd Rinaldo, Tom -Hukins, Tony Cook. - -The list above is almost certainly incomplete as it is automatically generated -from version control history. In particular, it does not include the names of -the (very much appreciated) contributors who reported issues to the Perl bug -tracker. +=head1 Acknowledgements -Many of the changes included in this version originated in the CPAN modules -included in Perl's core. We're grateful to the entire CPAN community for -helping Perl to flourish. +XXX Generate this with: -For a more complete list of all of Perl's historical contributors, please see -the F<AUTHORS> file in the Perl source distribution. + perl Porting/acknowledgements.pl v5.23.7..HEAD =head1 Reporting Bugs |