3 perldelta - what is new for perl v5.11.4
7 This document describes differences between the 5.11.3 release and
10 If you are upgrading from an earlier release such as 5.11.2, first read
11 L<perl5113delta>, which describes differences between 5.11.2 and
14 =head1 Incompatible Changes
16 =head2 Version number formats
18 Acceptable version number formats have been formalized into "strict" and
19 "lax" rules. C<package NAME VERSION> takes a strict version number. C<use
20 NAME VERSION> takes a lax version number. C<UNIVERSAL::VERSION> and the
21 L<version> object constructors take lax version numbers. Providing an
22 invalid version will result in a fatal error.
24 These formats will be documented fully in the L<version> module in a
25 subsequent release of Perl 5.11. To a first approximation, a "strict"
26 version number is a positive decimal number (integer or decimal-fraction)
27 without exponentiation or else a dotted-decimal v-string with a leading 'v'
28 character and at least three components. A "lax" version number allows
29 v-strings with fewer than three components or without a leading 'v'. Under
30 "lax" rules, both decimal and dotted-decimal versions may have a trailing
31 "alpha" component separated by an underscore character after a fractional
32 or dotted-decimal component.
34 The L<version> module adds C<version::is_strict> and C<version::is_lax>
35 functions to check a scalar against these rules.
37 =head1 Core Enhancements
39 =head2 Unicode properties
41 C<\p{XDigit}> now matches the same characters as C<\p{Hex_Digit}>. This
42 means that in addition to the characters it currently matches,
43 C<[A-Fa-f0-9]>, it will also match their fullwidth equivalent forms, for
44 example U+FF10: FULLWIDTH DIGIT ZERO.
46 =head1 Modules and Pragmata
48 =head2 Pragmata Changes
54 Upgraded from version 0.03 to 0.03.
56 This version introduces the C<stash_name> method to allow subclasses of less to
57 pick where in %^H to store their stash.
61 Upgraded from version 0.77 to 0.81.
63 This version adds support for L</Version number formats> as described earlier
64 in this document and in its own documentation.
68 Upgraded from version 1.08 to 1.09.
70 This version adds the C<illegalproto> warning category. See also L</New or
71 Changed Diagnostics> for this change.
75 =head2 Updated Modules
79 =item C<Archive::Extract>
81 Upgraded from version 0.36 to 0.38.
85 Upgraded from version 0.93 to 0.94.
87 =item C<Compress::Raw::Bzip2>
89 Upgraded from version 2.021 to 2.024.
91 =item C<Compress::Raw::Zlib>
93 Upgraded from version 2.021 to 2.024.
97 Upgraded from version 1.94_5301 to 1.94_54.
101 Upgraded from version 0.22 to 0.24.
103 =item C<Module::Build>
105 Upgraded from version 0.36 to 0.3603.
109 Upgraded from version 2.20 to 2.21.
111 Anonymous coderefs created in Safe containers no longer get bogus
112 arguments passed to them, fixing RT #72068.
116 =head2 Removed Modules and Pragmata
120 =item C<Devel::DProf::V>
122 Removed from the Perl core. Prior version was 'undef'.
126 =head1 Changes to Existing Documentation
128 A significant fraction of the core documentation has been updated to clarify
129 the behavior of Perl's Unicode handling.
131 Much of the remaining core documentation has been reviewed and edited
132 for clarity, consistent use of language, and to fix the spelling of Tom
135 =head2 Configuration improvements
137 USE_ATTRIBUTES_FOR_PERLIO is now reported in the compile-time options
138 listed by the C<-V> switch.
140 =head2 Platform Specific Changes
146 The default pipe buffer size on VMS has been updated to 8192 on 64-bit
151 =head1 Selected Bug Fixes
157 Tie::Hash::NamedCapture::* shouldn't abort if passed bad input (RT #71828)
161 @_ and $_ no longer leak under threads (RT #34342 and #41138, also
166 =head1 New or Changed Diagnostics
170 =item New warning category C<illegalproto>
174 Illegal character in prototype for %s : %s
175 Prototype after '%c' for %s : %s
177 have been moved from the C<syntax> top-level warnings category into a new
178 first-level category, C<illegalproto>. These two warnings are currently the
179 only ones emitted during parsing of an invalid/illegal prototype, so one
182 no warnings 'illegalproto';
184 to suppress only those, but not other syntax-related warnings. Warnings where
185 prototypes are changed, ignored, or not met are still in the C<prototype>
186 category as before. (Matt S. Trout)
188 =item lvalue attribute ignored after the subroutine has been defined
190 This new warning is issued when one attempts to mark a subroutine as
191 lvalue after it has been defined.
195 =head1 Changed Internals
201 Perl_magic_setmglob now knows about globs, fixing RT #71254.
205 =head1 Known Problems
207 Perl 5.11.4 is a development release leading up to Perl 5.12.0.
208 Some notable known problems found in 5.11.4 are listed as dependencies
209 of RT #69710, the Perl 5 version 12 meta-ticket.
213 The following items are now deprecated.
217 =item C<< UNIVERSAL-E<gt>import() >>
219 The method C<< UNIVERSAL-E<gt>import() >> is now deprecated. Attempting to
220 pass import arguments to a C<use UNIVERSAL> statement will result in a
221 deprecation warning. (This is a less noisy version of the full deprecation
222 warning added in 5.11.0.)
226 =head1 Acknowledgements
228 Perl 5.11.4 represents approximately one month of development since
229 Perl 5.11.3 and contains 17682 lines of changes across 318 files
230 from 40 authors and committers:
232 Abigail, Andy Dougherty, brian d foy, Chris Williams, Craig A. Berry,
233 David Golden, David Mitchell, Father Chrysostomos, Gerard Goossen,
234 H.Merijn Brand, Jesse Vincent, Jim Cromie, Josh ben Jore, Karl
235 Williamson, kmx, Matt S Trout, Nicholas Clark, Niko Tyni, Paul Marquess,
236 Philip Hazel, Rafael Garcia-Suarez, Rainer Tammer, Reini Urban, Ricardo
237 Signes, Shlomi Fish, Tim Bunce, Todd Rinaldo, Tom Christiansen, Tony
238 Cook, Vincent Pit, and Zefram
240 Many of the changes included in this version originated in the CPAN
241 modules included in Perl's core. We're grateful to the entire CPAN
242 community for helping Perl to flourish.
244 =head1 Reporting Bugs
246 If you find what you think is a bug, you might check the articles
247 recently posted to the comp.lang.perl.misc newsgroup and the perl
248 bug database at L<http://rt.perl.org/perlbug/>. There may also be
249 information at L<http://www.perl.org/>, the Perl Home Page.
251 If you believe you have an unreported bug, please run the B<perlbug>
252 program included with your release. Be sure to trim your bug down
253 to a tiny but sufficient test case. Your bug report, along with the
254 output of C<perl -V>, will be sent off to perlbug@perl.org to be
255 analyzed by the Perl porting team.
257 If the bug you are reporting has security implications, which make it
258 inappropriate to send to a publicly archived mailing list, then please send
259 it to perl5-security-report@perl.org. This points to a closed subscription
260 unarchived mailing list, which includes all the core committers, who be able
261 to help assess the impact of issues, figure out a resolution, and help
262 co-ordinate the release of patches to mitigate or fix the problem across all
263 platforms on which Perl is supported. Please only use this address for
264 security issues in the Perl core, not for modules independently
269 The F<Changes> file for an explanation of how to view exhaustive details
272 The F<INSTALL> file for how to build Perl.
274 The F<README> file for general stuff.
276 The F<Artistic> and F<Copying> files for copyright information.