diff options
| -rw-r--r-- | MANIFEST | 1 | ||||
| -rwxr-xr-x | Makefile.SH | 8 | ||||
| -rw-r--r-- | pod/.gitignore | 2 | ||||
| -rw-r--r-- | pod/perl.pod | 1 | ||||
| -rw-r--r-- | pod/perl5177delta.pod | 460 | ||||
| -rw-r--r-- | pod/perldelta.pod | 428 | ||||
| -rw-r--r-- | vms/descrip_mms.template | 2 | ||||
| -rw-r--r-- | win32/Makefile | 4 | ||||
| -rw-r--r-- | win32/makefile.mk | 4 | ||||
| -rw-r--r-- | win32/pod.mak | 4 |
10 files changed, 651 insertions, 263 deletions
@@ -4687,6 +4687,7 @@ pod/perl5173delta.pod Perl changes in version 5.17.3 pod/perl5174delta.pod Perl changes in version 5.17.4 pod/perl5175delta.pod Perl changes in version 5.17.5 pod/perl5176delta.pod Perl changes in version 5.17.6 +pod/perl5177delta.pod Perl changes in version 5.17.7 pod/perl561delta.pod Perl changes in version 5.6.1 pod/perl56delta.pod Perl changes in version 5.6 pod/perl581delta.pod Perl changes in version 5.8.1 diff --git a/Makefile.SH b/Makefile.SH index e553777ca8..bd27892328 100755 --- a/Makefile.SH +++ b/Makefile.SH @@ -491,7 +491,7 @@ mini_obj = $(minindt_obj) $(MINIDTRACE_O) ndt_obj = $(obj0) $(obj1) $(obj2) $(obj3) $(ARCHOBJS) obj = $(ndt_obj) $(DTRACE_O) -perltoc_pod_prereqs = extra.pods pod/perl5177delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod +perltoc_pod_prereqs = extra.pods pod/perl5178delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod generated_pods = pod/perltoc.pod $(perltoc_pod_prereqs) generated_headers = uudmap.h bitcount.h mg_data.h @@ -1067,9 +1067,9 @@ pod/perlintern.pod: $(MINIPERL_EXE) autodoc.pl embed.fnc pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST $(MINIPERL) $(Icwd) pod/perlmodlib.PL -q -pod/perl5177delta.pod: pod/perldelta.pod - $(RMS) pod/perl5177delta.pod - $(LNS) perldelta.pod pod/perl5177delta.pod +pod/perl5178delta.pod: pod/perldelta.pod + $(RMS) pod/perl5178delta.pod + $(LNS) perldelta.pod pod/perl5178delta.pod extra.pods: $(MINIPERL_EXE) -@test ! -f extra.pods || rm -f `cat extra.pods` diff --git a/pod/.gitignore b/pod/.gitignore index dcac3be42d..48e3628571 100644 --- a/pod/.gitignore +++ b/pod/.gitignore @@ -59,7 +59,7 @@ /roffitall # generated -/perl5177delta.pod +/perl5178delta.pod /perlapi.pod /perlintern.pod *.html diff --git a/pod/perl.pod b/pod/perl.pod index 571c1908bb..eba3cc7976 100644 --- a/pod/perl.pod +++ b/pod/perl.pod @@ -179,6 +179,7 @@ aux a2p c2ph h2ph h2xs perlbug pl2pm pod2html pod2man s2p splain xsubpp perlhist Perl history records perldelta Perl changes since previous version + perl5177delta Perl changes in version 5.17.7 perl5176delta Perl changes in version 5.17.6 perl5175delta Perl changes in version 5.17.5 perl5174delta Perl changes in version 5.17.4 diff --git a/pod/perl5177delta.pod b/pod/perl5177delta.pod new file mode 100644 index 0000000000..78d6ff3099 --- /dev/null +++ b/pod/perl5177delta.pod @@ -0,0 +1,460 @@ +=encoding utf8 + +=head1 NAME + +perl5177delta - what is new for perl v5.17.7 + +=head1 DESCRIPTION + +This document describes differences between the 5.17.6 release and the 5.17.7 +release. + +If you are upgrading from an earlier release such as 5.17.5, first read +L<perl5176delta>, which describes differences between 5.17.5 and 5.17.6. + +=head1 Core Enhancements + +=head2 $&, $` and $' are no longer slow + +These three infamous variables have been redeemed and no longer slow down +your program when used. Hence, the /p regular expression flag now does +nothing. + +=head1 Security + +=head2 C<Storable> security warning in documentation + +The documentation for C<Storable> now includes a section which warns readers +of the danger of accepting Storable documents from untrusted sources. The +short version is that deserializing certain types of data can lead to loading +modules and other code execution. This is documented behavior and wanted +behavior, but this opens an attack vector for malicious entities. + +=head2 C<Locale::Maketext> allowed code injection via a malicious template + +If users could provide a translation string to Locale::Maketext, this could be +used to invoke arbitrary Perl subroutines available in the current process. + +This has been fixed, but it is still possible to invoke any method provided by +C<Locale::Maketext> itself or a subclass that you are using. One of these +methods in turn will invoke the Perl core's C<sprintf> subroutine. + +In summary, allowing users to provide translation strings without auditing +them is a bad idea. + +This vulnerability is documented in CVE-2012-6329. + +=head1 Incompatible Changes + +=head2 readline() with C<$/ = \N> now reads N characters, not N bytes + +Previously, when reading from a stream with I/O layers such as +C<encoding>, the readline() function, otherwise known as the C<< <> >> +operator, would read I<N> bytes from the top-most layer. [perl #79960] + +Now, I<N> characters are read instead. + +There is no change in behaviour when reading from streams with no +extra layers, since bytes map exactly to characters. + +=head2 Lexical subroutine warnings have moved + +The warning about the use of an experimental feature emitted when lexical +subroutines (added in 5.17.4) are used now happens when the subroutine +itself is declared, not when the "lexical_subs" feature is activated via +C<use feature>. + +This stops C<use feature ':all'> from warning, but causes +C<my sub foo; my sub bar> to warn twice. + +=head2 Overridden C<glob> is now passed one argument + +C<glob> overrides used to be passed a magical undocumented second argument +that identified the caller. Nothing on CPAN was using this, and it got in +the way of a bug fix, so it was removed. If you really need to identify +the caller, see L<Devel::Callsite> on CPAN. + +=head1 Deprecations + +=head2 Lexical $_ is now deprecated + +Since it was introduced in Perl 5.10, it has caused much confusion with no +obvious solution: + +=over + +=item * + +Various modules (e.g., List::Util) expect callback routines to use the +global $_. C<use List::Util 'first'; my $_; first { $_ == 1 } @list> does +not work as one would expect. + +=item * + +A C<my $_> declaration earlier in the same file can cause confusing closure +warnings. + +=item * + +The "_" subroutine prototype character allows called subroutines to access +your lexical $_, so it is not really private after all. + +=item * + +Nevertheless, subroutines with a "(@)" prototype and methods cannot access +the caller's lexical $_, unless they are written in XS. + +=item * + +But even XS routines cannot access a lexical $_ declared, not in the +calling subroutine, but in an outer scope, iff that subroutine happened not +to mention $_ or use any operators that default to $_. + +=back + +=head2 Various XS-callable functions are now deprecated + +The following functions will be removed from a future version of Perl, +and should not be used. With participating C compilers (e.g., gcc), +compiling any file that uses any of these will generate a warning. +These were not intended for public use; there are equivalent, faster, +macros for most of them. See L<perlapi/Character classes>: +C<is_uni_ascii>, C<is_uni_ascii_lc>, C<is_uni_blank>, C<is_uni_blank_lc>, +C<is_uni_cntrl>, C<is_uni_cntrl_lc>, C<is_uni_idfirst_lc>, C<is_uni_space>, +C<is_uni_space_lc>, C<is_uni_xdigit>, C<is_uni_xdigit_lc>, C<is_utf8_ascii>, +C<is_utf8_blank>, C<is_utf8_cntrl>, C<is_utf8_idcont>, C<is_utf8_idfirst>, +C<is_utf8_perl_space>, C<is_utf8_perl_word>, C<is_utf8_posix_digit>, +C<is_utf8_space>, C<is_utf8_xdigit>. C<is_utf8_xidcont>, C<is_utf8_xidfirst>, +C<to_uni_lower_lc>, C<to_uni_title_lc>, and C<to_uni_upper_lc>. + +=head1 Performance Enhancements + +=over 4 + +=item * + +Perl has a new copy-on-write mechanism that avoids the need to copy the +internal string buffer when assigning from one scalar to another. This +makes copying large strings appear much faster. Modifying one of the two +(or more) strings after an assignment will force a copy internally. This +makes it unnecessary to pass strings by reference for efficiency. + +=back + +=head1 Modules and Pragmata + +=head2 Updated Modules and Pragmata + +=over 4 + +=item * + +L<File::DosGlob> has been upgraded from version 1.08 to 1.09. The internal +cache of file names that it keeps for each caller is now freed when that +caller is freed. This means +C<< use File::DosGlob 'glob'; eval 'scalar <*>' >> no longer leaks memory. + +=item * + +L<File::Glob> has been upgraded from version 1.18 to 1.19. File::Glob has +had exactly the same fix as File::DosGlob. Since it is what Perl's own +C<glob> operator itself uses (except on VMS), this means +C<< eval 'scalar <*>' >> no longer leaks. + +=item * + +L<GDBM_File> has been upgraded from version 1.14 to 1.15. The undocumented +optional fifth parameter to C<TIEHASH> has been removed. This was intended +to provide control of the callback used by C<gdbm*> functions in case of +fatal errors (such as filesystem problems), but did not work (and could +never have worked). No code on CPAN even attempted to use it. The callback +is now always the previous default, C<croak>. Problems on some platforms with +how the C<C> C<croak> function is called have also been resolved. + +=item * + +L<Module::CoreList> has been upgraded from version 2.78 to 2.79. + +=back + +=head1 Documentation + +=head2 Changes to Existing Documentation + +=head3 L<perlapi/Character classes> + +=over 4 + +=item * + +There are quite a few macros callable from XS modules that classify +characters into things like alphabetic, punctuation, etc. More of these +are now documented, including ones which work on characters whose code +points are outside the Latin-1 range. + +=back + +=head1 Diagnostics + +The following additions or changes have been made to diagnostic output, +including warnings and fatal error messages. For the complete list of +diagnostic messages, see L<perldiag>. + +=head2 Changes to Existing Diagnostics + +=over 4 + +=item * + +L<Constant(%s): Call to &{$^H{%s}} did not return a defined value|perldiag/Constant(%s): Call to &{$^H{%s}} did not return a defined value> + +Constant overloading that returns C<undef> results in this error message. +For numeric constants, it used to say "Constant(undef)". "undef" has been +replaced with the number itself. + +=back + +=head1 Internal Changes + +=over 4 + +=item * + +SvUPGRADE() is no longer an expression. Originally this macro (and its +underlying function, sv_upgrade()) were documented as boolean, although +in reality they always croaked on error and never returned false. In 2005 +the documentation was updated to specify a void return value, but +SvUPGRADE() was left always returning 1 for backwards compatibility. This +has now been removed, and SvUPGRADE() is now a statement with no return +value. + +So this is now a syntax error: + + if (!SvUPGRADE(sv)) { croak(...); } + +If you have code like that, simply replace it with + + SvUPGRADE(sv); + +or to to avoid compiler warnings with older perls, possibly + + (void)SvUPGRADE(sv); + +=item * + +Perl has a new copy-on-write mechanism that allows any SvPOK scalar to be +upgraded to a copy-on-write scalar. A reference count on the string buffer +is stored in the string buffer itself. + +This breaks a few XS modules by allowing copy-on-write scalars to go +through code paths that never encountered them before. + +This behaviour can still be disabled by running F<Configure> with +B<-Accflags=-DPERL_NO_COW>. This option will probably be removed in Perl +5.20. + +=item * + +Copy-on-write no longer uses the SvFAKE and SvREADONLY flags. Hence, +SvREADONLY indicates a true read-only SV. + +Use the SvIsCOW macro (as before) to identify a copy-on-write scalar. + +=item * + +C<PL_sawampersand> is now a constant. The switch this variable provided +(to enable/disable the pre-match copy depending on whether C<$&> had been +seen) has been removed and replaced with copy-on-write, eliminating a few +bugs. + +The previous behaviour can still be enabled by running F<Configure> with +B<-Accflags=-DPERL_SAWAMPERSAND>. + +=item * + +PL_glob_index is gone. + +=back + +=head1 Selected Bug Fixes + +=over 4 + +=item * + +C<sort {undef} ...> under fatal warnings no longer crashes. It started +crashing in Perl 5.16. + +=item * + +Stashes blessed into each other +(C<bless \%Foo::, 'Bar'; bless \%Bar::, 'Foo'>) no longer result in double +frees. This bug started happening in Perl 5.16. + +=item * + +Numerous memory leaks have been fixed, mostly involving fatal warnings and +syntax errors. + +=item * + +Lexical constants (C<my sub answer () { 42 }>) no longer cause double +frees. + +=item * + +Constant subroutine redefinition warns by default, but lexical constants +were accidentally exempt from default warnings. This has been corrected. + +=item * + +Some failed regular expression matches such as C<'f' =~ /../g> were not +resetting C<pos>. Also, "match-once" patterns (C<m?...?g>) failed to reset +it, too, when invoked a second time [perl #23180]. + +=item * + +Accessing C<$&> after a pattern match now works if it had not been seen +before the match. I.e., this applies to C<${'&'}> (under C<no strict>) and +C<eval '$&'>. The same applies to C<$'> and C<$`> [perl #4289]. + +=item * + +Several bugs involving C<local *ISA> and C<local *Foo::> causing stale +MRO caches have been fixed. + +=item * + +Defining a subroutine when its typeglob has been aliased no longer results +in stale method caches. This bug was introduced in Perl 5.10. + +=item * + +Localising a typeglob containing a subroutine when the typeglob's package +has been deleted from its parent stash no longer produces an error. This +bug was introduced in Perl 5.14. + +=item * + +Under some circumstances, C<local *method=...> would fail to reset method +caches upon scope exit. + +=item * + +C</[.foo.]/> is no longer an error, but produces a warning (as before) and +is treated as C</[.fo]/> [perl #115818]. + +=item * + +C<goto $tied_var> now calls FETCH before deciding what type of goto +(subroutine or label) this is. + +=item * + +Renaming packages through glob assignment +(C<*Foo:: = *Bar::; *Bar:: = *Baz::>) in combination with C<m?...?> and +C<reset> no longer makes threaded builds crash. + +=item * + +An earlier release in the 5.17.x series could crash if user code prevented +_charnames from loading via C<$INC{'_charnames.pm'}++>. + +=item * + +A number of bugs related to assigning a list to hash have been fixed. Many of +these involve lists with repeated keys like C<(1, 1, 1, 1)>. + +=over 8 + +=item - + +The expression C<scalar(%h = (1, 1, 1, 1))> now returns C<4>, not C<2>. + +=item - + +The return value of C<%h = (1, 1, 1)> in list context was wrong. Previously +this would return C<(1, undef, 1)>, now it returns C<(1, undef)>. + +=item - + +Perl now issues the same warning on C<($s, %h) = (1, {})> as it does for +C<(%h) = ({})>, "Reference found where even-sized list expected". + +=item - + +A number of additional edge cases in list assignment to hashes were +corrected. For more details see commit 23b7025ebc. + +=back + +=back + +=head1 Known Problems + +There may be a failure in the F<t/op/require_errors.t> test if you run the +test suite as the root user. + +=head1 Acknowledgements + +Perl 5.17.7 represents approximately 4 weeks of development since Perl 5.17.6 +and contains approximately 30,000 lines of changes across 490 files from 26 +authors. + +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 5.17.7: + +Alexandr Ciornii, Bob Ernst, Brian Carlson, Chris 'BinGOs' Williams, Craig A. +Berry, Daniel Dragan, Dave Rolsky, David Mitchell, Father Chrysostomos, Hugo +van der Sanden, James E Keenan, Joel Berger, Karl Williamson, Lukas Mai, Martin +Hasch, Matthew Horsfall, Nicholas Clark, Ricardo Signes, Ruslan Zakirov, Sergey +Alekseev, Steffen Müller, Sullivan Beck, Sven Strickroth, Sébastien +Aperghis-Tramoni, Tony Cook, Yves Orton. + +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. + +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. + +For a more complete list of all of Perl's historical contributors, please see +the F<AUTHORS> file in the Perl source distribution. + +=head1 Reporting Bugs + +If you find what you think is a bug, you might check the articles recently +posted to the comp.lang.perl.misc newsgroup and the perl bug database at +http://rt.perl.org/perlbug/ . There may also be information at +http://www.perl.org/ , the Perl Home Page. + +If you believe you have an unreported bug, please run the L<perlbug> program +included with your release. Be sure to trim your bug down to a tiny but +sufficient test case. Your bug report, along with the output of C<perl -V>, +will be sent off to perlbug@perl.org to be analysed by the Perl porting team. + +If the bug you are reporting has security implications, which make it +inappropriate to send to a publicly archived mailing list, then please send it +to perl5-security-report@perl.org. This points to a closed subscription +unarchived mailing list, which includes all the core committers, who 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 an explanation of how to view exhaustive details on +what changed. + +The F<INSTALL> file for how to build Perl. + +The F<README> file for general stuff. + +The F<Artistic> and F<Copying> files for copyright information. + +=cut diff --git a/pod/perldelta.pod b/pod/perldelta.pod index 0b74681407..71325ef6c8 100644 --- a/pod/perldelta.pod +++ b/pod/perldelta.pod @@ -2,195 +2,140 @@ =head1 NAME -perldelta - what is new for perl v5.17.7 +[ 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 v5.17.8 =head1 DESCRIPTION -This document describes differences between the 5.17.6 release and the 5.17.7 +This document describes differences between the 5.17.7 release and the 5.17.8 release. -If you are upgrading from an earlier release such as 5.17.5, first read -L<perl5176delta>, which describes differences between 5.17.5 and 5.17.6. - -=head1 Core Enhancements - -=head2 $&, $` and $' are no longer slow - -These three infamous variables have been redeemed and no longer slow down -your program when used. Hence, the /p regular expression flag now does -nothing. +If you are upgrading from an earlier release such as 5.17.6, first read +L<perl5177delta>, which describes differences between 5.17.6 and 5.17.7. -=head1 Security +=head1 Notice -=head2 C<Storable> security warning in documentation +XXX Any important notices here -The documentation for C<Storable> now includes a section which warns readers -of the danger of accepting Storable documents from untrusted sources. The -short version is that deserializing certain types of data can lead to loading -modules and other code execution. This is documented behavior and wanted -behavior, but this opens an attack vector for malicious entities. +=head1 Core Enhancements -=head2 C<Locale::Maketext> allowed code injection via a malicious template +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. -If users could provide a translation string to Locale::Maketext, this could be -used to invoke arbitrary Perl subroutines available in the current process. +[ List each enhancement as a =head2 entry ] -This has been fixed, but it is still possible to invoke any method provided by -C<Locale::Maketext> itself or a subclass that you are using. One of these -methods in turn will invoke the Perl core's C<sprintf> subroutine. +=head1 Security -In summary, allowing users to provide translation strings without auditing -them is a bad idea. +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. -This vulnerability is documented in CVE-2012-6329. +[ List each security issue as a =head2 entry ] =head1 Incompatible Changes -=head2 readline() with C<$/ = \N> now reads N characters, not N bytes - -Previously, when reading from a stream with I/O layers such as -C<encoding>, the readline() function, otherwise known as the C<< <> >> -operator, would read I<N> bytes from the top-most layer. [perl #79960] +XXX For a release on a stable branch, this section aspires to be: -Now, I<N> characters are read instead. + 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. -There is no change in behaviour when reading from streams with no -extra layers, since bytes map exactly to characters. +[ List each incompatible change as a =head2 entry ] -=head2 Lexical subroutine warnings have moved - -The warning about the use of an experimental feature emitted when lexical -subroutines (added in 5.17.4) are used now happens when the subroutine -itself is declared, not when the "lexical_subs" feature is activated via -C<use feature>. - -This stops C<use feature ':all'> from warning, but causes -C<my sub foo; my sub bar> to warn twice. +=head1 Deprecations -=head2 Overridden C<glob> is now passed one argument +XXX Any deprecated features, syntax, modules etc. should be listed here. In +particular, deprecated modules should be listed here even if they are listed as +an updated module in the L</Modules and Pragmata> section. -C<glob> overrides used to be passed a magical undocumented second argument -that identified the caller. Nothing on CPAN was using this, and it got in -the way of a bug fix, so it was removed. If you really need to identify -the caller, see L<Devel::Callsite> on CPAN. +[ List each deprecation as a =head2 entry ] -=head1 Deprecations +=head1 Performance Enhancements -=head2 Lexical $_ is now deprecated +XXX Changes which enhance performance without changing behaviour go here. +There may well be none in a stable release. -Since it was introduced in Perl 5.10, it has caused much confusion with no -obvious solution: +[ List each enhancement as a =item entry ] -=over +=over 4 =item * -Various modules (e.g., List::Util) expect callback routines to use the -global $_. C<use List::Util 'first'; my $_; first { $_ == 1 } @list> does -not work as one would expect. +XXX -=item * +=back -A C<my $_> declaration earlier in the same file can cause confusing closure -warnings. +=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>, which prints stub +entries to STDOUT. Results can be pasted in place of the '=head2' entries +below. 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. -The "_" subroutine prototype character allows called subroutines to access -your lexical $_, so it is not really private after all. +[ Within each section, list entries as a =item entry ] -=item * +=head2 New Modules and Pragmata -Nevertheless, subroutines with a "(@)" prototype and methods cannot access -the caller's lexical $_, unless they are written in XS. +=over 4 =item * -But even XS routines cannot access a lexical $_ declared, not in the -calling subroutine, but in an outer scope, iff that subroutine happened not -to mention $_ or use any operators that default to $_. +XXX =back -=head2 Various XS-callable functions are now deprecated - -The following functions will be removed from a future version of Perl, -and should not be used. With participating C compilers (e.g., gcc), -compiling any file that uses any of these will generate a warning. -These were not intended for public use; there are equivalent, faster, -macros for most of them. See L<perlapi/Character classes>: -C<is_uni_ascii>, C<is_uni_ascii_lc>, C<is_uni_blank>, C<is_uni_blank_lc>, -C<is_uni_cntrl>, C<is_uni_cntrl_lc>, C<is_uni_idfirst_lc>, C<is_uni_space>, -C<is_uni_space_lc>, C<is_uni_xdigit>, C<is_uni_xdigit_lc>, C<is_utf8_ascii>, -C<is_utf8_blank>, C<is_utf8_cntrl>, C<is_utf8_idcont>, C<is_utf8_idfirst>, -C<is_utf8_perl_space>, C<is_utf8_perl_word>, C<is_utf8_posix_digit>, -C<is_utf8_space>, C<is_utf8_xdigit>. C<is_utf8_xidcont>, C<is_utf8_xidfirst>, -C<to_uni_lower_lc>, C<to_uni_title_lc>, and C<to_uni_upper_lc>. - -=head1 Performance Enhancements +=head2 Updated Modules and Pragmata =over 4 =item * -Perl has a new copy-on-write mechanism that avoids the need to copy the -internal string buffer when assigning from one scalar to another. This -makes copying large strings appear much faster. Modifying one of the two -(or more) strings after an assignment will force a copy internally. This -makes it unnecessary to pass strings by reference for efficiency. +L<XXX> has been upgraded from version A.xx to B.yy. =back -=head1 Modules and Pragmata - -=head2 Updated Modules and Pragmata +=head2 Removed Modules and Pragmata =over 4 =item * -L<File::DosGlob> has been upgraded from version 1.08 to 1.09. The internal -cache of file names that it keeps for each caller is now freed when that -caller is freed. This means -C<< use File::DosGlob 'glob'; eval 'scalar <*>' >> no longer leaks memory. +XXX -=item * - -L<File::Glob> has been upgraded from version 1.18 to 1.19. File::Glob has -had exactly the same fix as File::DosGlob. Since it is what Perl's own -C<glob> operator itself uses (except on VMS), this means -C<< eval 'scalar <*>' >> no longer leaks. +=back -=item * +=head1 Documentation -L<GDBM_File> has been upgraded from version 1.14 to 1.15. The undocumented -optional fifth parameter to C<TIEHASH> has been removed. This was intended -to provide control of the callback used by C<gdbm*> functions in case of -fatal errors (such as filesystem problems), but did not work (and could -never have worked). No code on CPAN even attempted to use it. The callback -is now always the previous default, C<croak>. Problems on some platforms with -how the C<C> C<croak> function is called have also been resolved. +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>. -=item * +=head2 New Documentation -L<Module::CoreList> has been upgraded from version 2.78 to 2.79. +XXX Changes which create B<new> files in F<pod/> go here. -=back +=head3 L<XXX> -=head1 Documentation +XXX Description of the purpose of the new file here =head2 Changes to Existing Documentation -=head3 L<perlapi/Character classes> +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 * -There are quite a few macros callable from XS modules that classify -characters into things like alphabetic, punctuation, etc. More of these -are now documented, including ones which work on characters whose code -points are outside the Latin-1 range. +XXX Description of the change here =back @@ -200,229 +145,206 @@ 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>. -=head2 Changes to Existing Diagnostics +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. + +=head2 New Diagnostics + +XXX Newly added diagnostic messages go under here, separated into New Errors +and New Warnings + +=head3 New Errors =over 4 =item * -L<Constant(%s): Call to &{$^H{%s}} did not return a defined value|perldiag/Constant(%s): Call to &{$^H{%s}} did not return a defined value> - -Constant overloading that returns C<undef> results in this error message. -For numeric constants, it used to say "Constant(undef)". "undef" has been -replaced with the number itself. +XXX L<message|perldiag/"message"> =back -=head1 Internal Changes +=head3 New Warnings =over 4 =item * -SvUPGRADE() is no longer an expression. Originally this macro (and its -underlying function, sv_upgrade()) were documented as boolean, although -in reality they always croaked on error and never returned false. In 2005 -the documentation was updated to specify a void return value, but -SvUPGRADE() was left always returning 1 for backwards compatibility. This -has now been removed, and SvUPGRADE() is now a statement with no return -value. +XXX L<message|perldiag/"message"> -So this is now a syntax error: +=back - if (!SvUPGRADE(sv)) { croak(...); } +=head2 Changes to Existing Diagnostics -If you have code like that, simply replace it with +XXX Changes (i.e. rewording) of diagnostic messages go here - SvUPGRADE(sv); +=over 4 -or to to avoid compiler warnings with older perls, possibly +=item * - (void)SvUPGRADE(sv); +XXX Describe change here -=item * +=back -Perl has a new copy-on-write mechanism that allows any SvPOK scalar to be -upgraded to a copy-on-write scalar. A reference count on the string buffer -is stored in the string buffer itself. +=head1 Utility Changes -This breaks a few XS modules by allowing copy-on-write scalars to go -through code paths that never encountered them before. +XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. +Most of these are built within the directories F<utils> and F<x2p>. -This behaviour can still be disabled by running F<Configure> with -B<-Accflags=-DPERL_NO_COW>. This option will probably be removed in Perl -5.20. +[ List utility changes as a =head3 entry for each utility and =item +entries for each change +Use L<XXX> with program names to get proper documentation linking. ] + +=head3 L<XXX> + +=over 4 =item * -Copy-on-write no longer uses the SvFAKE and SvREADONLY flags. Hence, -SvREADONLY indicates a true read-only SV. +XXX -Use the SvIsCOW macro (as before) to identify a copy-on-write scalar. +=back -=item * +=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. -C<PL_sawampersand> is now a constant. The switch this variable provided -(to enable/disable the pre-match copy depending on whether C<$&> had been -seen) has been removed and replaced with copy-on-write, eliminating a few -bugs. +[ List changes as a =item entry ]. -The previous behaviour can still be enabled by running F<Configure> with -B<-Accflags=-DPERL_SAWAMPERSAND>. +=over 4 =item * -PL_glob_index is gone. +XXX =back -=head1 Selected Bug Fixes +=head1 Testing -=over 4 +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. -=item * +[ List each test improvement as a =item entry ] -C<sort {undef} ...> under fatal warnings no longer crashes. It started -crashing in Perl 5.16. +=over 4 =item * -Stashes blessed into each other -(C<bless \%Foo::, 'Bar'; bless \%Bar::, 'Foo'>) no longer result in double -frees. This bug started happening in Perl 5.16. +XXX -=item * +=back -Numerous memory leaks have been fixed, mostly involving fatal warnings and -syntax errors. +=head1 Platform Support -=item * +XXX Any changes to platform support should be listed in the sections below. -Lexical constants (C<my sub answer () { 42 }>) no longer cause double -frees. +[ Within the sections, list each platform as a =item entry with specific +changes as paragraphs below it. ] -=item * +=head2 New Platforms -Constant subroutine redefinition warns by default, but lexical constants -were accidentally exempt from default warnings. This has been corrected. +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. -=item * +=over 4 -Some failed regular expression matches such as C<'f' =~ /../g> were not -resetting C<pos>. Also, "match-once" patterns (C<m?...?g>) failed to reset -it, too, when invoked a second time [perl #23180]. +=item XXX-some-platform -=item * +XXX -Accessing C<$&> after a pattern match now works if it had not been seen -before the match. I.e., this applies to C<${'&'}> (under C<no strict>) and -C<eval '$&'>. The same applies to C<$'> and C<$`> [perl #4289]. +=back -=item * +=head2 Discontinued Platforms -Several bugs involving C<local *ISA> and C<local *Foo::> causing stale -MRO caches have been fixed. +XXX List any platforms that this version of perl no longer compiles on. -=item * +=over 4 -Defining a subroutine when its typeglob has been aliased no longer results -in stale method caches. This bug was introduced in Perl 5.10. +=item XXX-some-platform -=item * +XXX -Localising a typeglob containing a subroutine when the typeglob's package -has been deleted from its parent stash no longer produces an error. This -bug was introduced in Perl 5.14. +=back -=item * +=head2 Platform-Specific Notes -Under some circumstances, C<local *method=...> would fail to reset method -caches upon scope exit. +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. -=item * +=over 4 -C</[.foo.]/> is no longer an error, but produces a warning (as before) and -is treated as C</[.fo]/> [perl #115818]. +=item XXX-some-platform -=item * +XXX -C<goto $tied_var> now calls FETCH before deciding what type of goto -(subroutine or label) this is. +=back -=item * +=head1 Internal Changes -Renaming packages through glob assignment -(C<*Foo:: = *Bar::; *Bar:: = *Baz::>) in combination with C<m?...?> and -C<reset> no longer makes threaded builds crash. +XXX Changes which affect the interface available to C<XS> code go here. Other +significant internal changes for future core maintainers should be noted as +well. -=item * +[ List each change as a =item entry ] -An earlier release in the 5.17.x series could crash if user code prevented -_charnames from loading via C<$INC{'_charnames.pm'}++>. +=over 4 =item * -A number of bugs related to assigning a list to hash have been fixed. Many of -these involve lists with repeated keys like C<(1, 1, 1, 1)>. +XXX -=over 8 +=back -=item - +=head1 Selected Bug Fixes -The expression C<scalar(%h = (1, 1, 1, 1))> now returns C<4>, not C<2>. +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>. -=item - +[ List each fix as a =item entry ] -The return value of C<%h = (1, 1, 1)> in list context was wrong. Previously -this would return C<(1, undef, 1)>, now it returns C<(1, undef)>. +=over 4 -=item - +=item * -Perl now issues the same warning on C<($s, %h) = (1, {})> as it does for -C<(%h) = ({})>, "Reference found where even-sized list expected". +XXX -=item - +=back -A number of additional edge cases in list assignment to hashes were -corrected. For more details see commit 23b7025ebc. +=head1 Known Problems -=back +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. -=back +[ List each fix as a =item entry ] -=head1 Known Problems +=over 4 -There may be a failure in the F<t/op/require_errors.t> test if you run the -test suite as the root user. +=item * -=head1 Acknowledgements +XXX -Perl 5.17.7 represents approximately 4 weeks of development since Perl 5.17.6 -and contains approximately 30,000 lines of changes across 490 files from 26 -authors. +=back -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 5.17.7: +=head1 Obituary -Alexandr Ciornii, Bob Ernst, Brian Carlson, Chris 'BinGOs' Williams, Craig A. -Berry, Daniel Dragan, Dave Rolsky, David Mitchell, Father Chrysostomos, Hugo -van der Sanden, James E Keenan, Joel Berger, Karl Williamson, Lukas Mai, Martin -Hasch, Matthew Horsfall, Nicholas Clark, Ricardo Signes, Ruslan Zakirov, Sergey -Alekseev, Steffen Müller, Sullivan Beck, Sven Strickroth, Sébastien -Aperghis-Tramoni, Tony Cook, Yves Orton. +XXX If any significant core contributor has died, we've added a short obituary +here. -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 v5.17.7..HEAD =head1 Reporting Bugs diff --git a/vms/descrip_mms.template b/vms/descrip_mms.template index ec8b678960..4c61a0143a 100644 --- a/vms/descrip_mms.template +++ b/vms/descrip_mms.template @@ -326,7 +326,7 @@ x2p : [.x2p]$(DBG)a2p$(E) [.x2p]s2p.com [.x2p]find2perl.com extra.pods : miniperl @ @extra_pods.com -PERLDELTA_CURRENT = [.pod]perl5177delta.pod +PERLDELTA_CURRENT = [.pod]perl5178delta.pod $(PERLDELTA_CURRENT) : [.pod]perldelta.pod Copy/NoConfirm/Log $(MMS$SOURCE) $(PERLDELTA_CURRENT) diff --git a/win32/Makefile b/win32/Makefile index 5f2f5d5f44..71c9162bce 100644 --- a/win32/Makefile +++ b/win32/Makefile @@ -1154,7 +1154,7 @@ utils: $(PERLEXE) $(X2P) copy ..\README.tw ..\pod\perltw.pod copy ..\README.vos ..\pod\perlvos.pod copy ..\README.win32 ..\pod\perlwin32.pod - copy ..\pod\perldelta.pod ..\pod\perl5177delta.pod + copy ..\pod\perldelta.pod ..\pod\perl5178delta.pod cd ..\win32 $(PERLEXE) $(PL2BAT) $(UTILS) $(PERLEXE) $(ICWD) ..\autodoc.pl .. @@ -1247,7 +1247,7 @@ distclean: realclean -if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS -if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API -cd $(PODDIR) && del /f *.html *.bat roffitall \ - perl5177delta.pod perlaix.pod perlamiga.pod perlapi.pod \ + perl5178delta.pod perlaix.pod perlamiga.pod perlapi.pod \ perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \ perldgux.pod perldos.pod perlfreebsd.pod perlhaiku.pod \ perlhpux.pod perlhurd.pod perlintern.pod perlirix.pod \ diff --git a/win32/makefile.mk b/win32/makefile.mk index a567c0ef5f..aeaba8e4bb 100644 --- a/win32/makefile.mk +++ b/win32/makefile.mk @@ -1334,7 +1334,7 @@ utils: $(PERLEXE) $(X2P) copy ..\README.tw ..\pod\perltw.pod copy ..\README.vos ..\pod\perlvos.pod copy ..\README.win32 ..\pod\perlwin32.pod - copy ..\pod\perldelta.pod ..\pod\perl5177delta.pod + copy ..\pod\perldelta.pod ..\pod\perl5178delta.pod $(PERLEXE) $(PL2BAT) $(UTILS) $(PERLEXE) $(ICWD) ..\autodoc.pl .. $(PERLEXE) $(ICWD) ..\pod\perlmodlib.pl -q @@ -1426,7 +1426,7 @@ distclean: realclean -if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS -if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API -cd $(PODDIR) && del /f *.html *.bat roffitall \ - perl5177delta.pod perlaix.pod perlamiga.pod perlapi.pod \ + perl5178delta.pod perlaix.pod perlamiga.pod perlapi.pod \ perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \ perldgux.pod perldos.pod perlfreebsd.pod perlhaiku.pod \ perlhpux.pod perlhurd.pod perlintern.pod perlirix.pod \ diff --git a/win32/pod.mak b/win32/pod.mak index 6cd719ce31..8625bb71d1 100644 --- a/win32/pod.mak +++ b/win32/pod.mak @@ -39,6 +39,7 @@ POD = perl.pod \ perl5175delta.pod \ perl5176delta.pod \ perl5177delta.pod \ + perl5178delta.pod \ perl561delta.pod \ perl56delta.pod \ perl581delta.pod \ @@ -169,6 +170,7 @@ MAN = perl.man \ perl5175delta.man \ perl5176delta.man \ perl5177delta.man \ + perl5178delta.man \ perl561delta.man \ perl56delta.man \ perl581delta.man \ @@ -299,6 +301,7 @@ HTML = perl.html \ perl5175delta.html \ perl5176delta.html \ perl5177delta.html \ + perl5178delta.html \ perl561delta.html \ perl56delta.html \ perl581delta.html \ @@ -429,6 +432,7 @@ TEX = perl.tex \ perl5175delta.tex \ perl5176delta.tex \ perl5177delta.tex \ + perl5178delta.tex \ perl561delta.tex \ perl56delta.tex \ perl581delta.tex \ |