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[perl #71710] fixes for File::Find
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1=encoding utf8
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3=head1 NAME
4
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5[ this is a template for a new perldelta file. Any text flagged as
6XXX needs to be processed before release. ]
4c793fe3 7
ee0887a9 8perldelta - what is new for perl v5.13.6
4c793fe3 9
ee0887a9 10=head1 DESCRIPTION
0c692eed 11
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12This document describes differences between the 5.13.5 release and
13the 5.13.6 release.
0c692eed 14
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15If you are upgrading from an earlier release such as 5.13.4, first read
16L<perl5135delta>, which describes differences between 5.13.4 and
175.13.5.
0c692eed 18
ee0887a9 19=head1 Notice
0c692eed 20
ee0887a9 21XXX Any important notices here
4c793fe3 22
ee0887a9 23=head1 Core Enhancements
85318b69 24
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25XXX New core language features go here. Summarise user-visible core language
26enhancements. Particularly prominent performance optimisations could go
27here, but most should go in the L</Performance Enhancements> section.
85318b69 28
ee0887a9 29[ List each enhancement as a =head2 entry ]
85318b69 30
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31=head2 C<(?^...)> regex construct added to signify default modifiers
32
33A caret (also called a "cirumflex accent") C<"^"> immediately following
34a C<"(?"> in a regular expression now means that the subexpression is to
35not inherit the surrounding modifiers such as C</i>, but to revert to the
36Perl defaults. Any modifiers following the caret override the defaults.
37
38The stringification of regular expressions now uses this notation. The
39main purpose of this is to allow tests that rely on the stringification
40to not have to change when new modifiers are added. See
41L<perlre/Extended Patterns>.
42
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43=head2 C<"d">, C<"l">, and C<"u"> regex modifiers added
44
45These modifiers are currently only available within a C<(?...)> construct.
46
47The C<"l"> modifier says to compile the regular expression as if it were
48in the scope of C<use locale>, even if it is not.
49
50The C<"u"> modifier currently does nothing.
51
52The C<"d"> modifier is used in the scope of C<use locale> to compile the
53regular expression as if it were not in that scope.
54See L<perlre/(?dlupimsx-imsx)>.
55
ee0887a9 56=head1 Security
85318b69 57
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58XXX Any security-related notices go here. In particular, any security
59vulnerabilities closed should be noted here rather than in the
60L</Selected Bug Fixes> section.
85318b69 61
ee0887a9 62[ List each security issue as a =head2 entry ]
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63
64=head1 Incompatible Changes
65
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66=head2 Stringification of regexes has changed
67
68Default regular expression modifiers are now notated by using
69C<(?^...)>. Code relying on the old stringification will fail. The
70purpose of this is so that when new modifiers are added, such code will
71not have to change, as the stringification will automatically
72incorporate the new modifiers.
73
74Code that needs to work properly with both old- and new-style regexes
75can use something like the following:
76
77 # Accept both old and new-style stringification
78 my $modifiers = (qr/foobar/ =~ /\Q(?^/) ? '^' : '-xism';
44428a46 79
fb85c044 80And then use C<$modifiers> instead of C<-xism>.
44428a46 81
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82=head2 Regular expressions retain their localeness when interpolated
83
84Regular expressions compiled under C<"use locale"> now retain this when
85interpolated into a new regular expression compiled outside a
86C<"use locale">, and vice-versa.
87
88Previously, a regular expression interpolated into another one inherited
89the localeness of the surrounding one, losing whatever state it
90originally had. This is considered a bug fix, but may trip up code that
91has come to rely on the incorrect behavior.
92
ee0887a9 93[ List each incompatible change as a =head2 entry ]
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94
95=head1 Deprecations
96
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97XXX Any deprecated features, syntax, modules etc. should be listed here.
98In particular, deprecated modules should be listed here even if they are
99listed as an updated module in the L</Modules and Pragmata> section.
85318b69 100
ee0887a9 101[ List each deprecation as a =head2 entry ]
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102
103=head1 Performance Enhancements
104
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105XXX Changes which enhance performance without changing behaviour go here. There
106may well be none in a stable release.
4c793fe3 107
ee0887a9 108[ List each enhancement as a =item entry ]
4c793fe3 109
ee0887a9 110=over 4
4c793fe3 111
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112=item *
113
ee0887a9 114XXX
e2babdfb 115
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116=back
117
118=head1 Modules and Pragmata
119
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120XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
121go here. If Module::CoreList is updated, generate an initial draft of the
122following sections using F<Porting/corelist-perldelta.pl>, which prints stub
123entries to STDOUT. Results can be pasted in place of the '=head2' entries
124below. A paragraph summary for important changes should then be added by hand.
125In an ideal world, dual-life modules would have a F<Changes> file that could be
126cribbed.
fc1418b7 127
ee0887a9 128[ Within each section, list entries as a =item entry ]
df91fef1 129
ee0887a9 130=head2 New Modules and Pragmata
ccb45ef4 131
ee0887a9 132=over 4
df91fef1 133
ee0887a9 134=item *
df91fef1 135
ee0887a9 136XXX
e2babdfb 137
ee0887a9 138=back
e2babdfb 139
ee0887a9 140=head2 Updated Modules and Pragmata
fc1418b7 141
ee0887a9 142=over 4
fc1418b7 143
ee0887a9 144=item *
e2babdfb 145
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146C<NEXT> has been upgraded from version 0.64 to 0.65.
147
148=item *
149
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150C<PathTools> has been upgraded from version 3.31_01 to 3.33.
151
152=item *
153
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154C<Unicode::Collate> has been upgraded from version 0.59 to 0.60
155
156=item *
157
1c2dcb3e 158C<Unicode::Normalize> has been upgraded from version 1.06 to 1.07
c9a84c8b 159
ee0887a9 160=back
c9a84c8b 161
ee0887a9 162=head2 Removed Modules and Pragmata
c9a84c8b 163
ee0887a9 164=over 4
4c793fe3 165
ee0887a9 166=item *
48c1efd2 167
ee0887a9 168XXX
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169
170=back
171
172=head1 Documentation
173
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174XXX Changes to files in F<pod/> go here. Consider grouping entries by
175file and be sure to link to the appropriate page, e.g. L<perlfunc>.
4c793fe3 176
ee0887a9 177=head2 New Documentation
4c793fe3 178
ee0887a9 179XXX Changes which create B<new> files in F<pod/> go here.
4c793fe3 180
ee0887a9 181=head3 L<XXX>
4c793fe3 182
ee0887a9 183XXX Description of the purpose of the new file here
4c793fe3 184
ee0887a9 185=head2 Changes to Existing Documentation
fc1418b7 186
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187XXX Changes which significantly change existing files in F<pod/> go here.
188However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
189section.
fc1418b7 190
ee0887a9 191=head3 L<XXX>
e2babdfb 192
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193=over 4
194
195=item *
196
ee0887a9 197XXX Description of the change here
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198
199=back
e2babdfb 200
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201=head1 Diagnostics
202
203The following additions or changes have been made to diagnostic output,
204including warnings and fatal error messages. For the complete list of
205diagnostic messages, see L<perldiag>.
206
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207XXX New or changed warnings emitted by the core's C<C> code go here. Also
208include any changes in L<perldiag> that reconcile it to the C<C> code.
4c793fe3 209
ee0887a9 210[ Within each section, list entries as a =item entry ]
4c793fe3 211
ee0887a9 212=head2 New Diagnostics
4c793fe3 213
ee0887a9 214XXX Newly added diagnostic messages go here
fc1418b7 215
ee0887a9 216=over 4
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217
218=item *
219
ee0887a9 220XXX
ebce6c40 221
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222=back
223
ee0887a9 224=head2 Changes to Existing Diagnostics
4c793fe3 225
ee0887a9 226XXX Changes (i.e. rewording) of diagnostic messages go here
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227
228=over 4
229
230=item *
231
ee0887a9 232XXX
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233
234=back
235
ee0887a9 236=head1 Utility Changes
4c793fe3 237
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238XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go
239here. Most of these are built within the directories F<utils> and F<x2p>.
4c793fe3 240
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241[ List utility changes as a =head3 entry for each utility and =item
242entries for each change
243Use L<XXX> with program names to get proper documentation linking. ]
fc1418b7 244
ee0887a9 245=head3 L<XXX>
fc1418b7 246
ee0887a9 247=over 4
4c793fe3 248
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249=item *
250
ee0887a9 251XXX
44428a46 252
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253=back
254
ee0887a9 255=head1 Configuration and Compilation
4c793fe3 256
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257XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
258go here. Any other changes to the Perl build process should be listed here.
259However, any platform-specific changes should be listed in the
260L</Platform Support> section, instead.
4c793fe3 261
ee0887a9 262[ List changes as a =item entry ].
4c793fe3 263
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264=over 4
265
266=item *
267
ee0887a9 268XXX
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269
270=back
4c793fe3 271
ee0887a9 272=head1 Testing
0c692eed 273
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274XXX Any significant changes to the testing of a freshly built perl should be
275listed here. Changes which create B<new> files in F<t/> go here as do any
276large changes to the testing harness (e.g. when parallel testing was added).
277Changes to existing files in F<t/> aren't worth summarising, although the bugs
278that they represent may be covered elsewhere.
0c692eed 279
ee0887a9 280[ List each test improvement as a =item entry ]
0c692eed 281
ee0887a9 282=over 4
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283
284=item *
285
ee0887a9 286XXX
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287
288=back
289
ee0887a9 290=head1 Platform Support
4c793fe3 291
ee0887a9 292XXX Any changes to platform support should be listed in the sections below.
4c793fe3 293
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294[ Within the sections, list each platform as a =item entry with specific
295changes as paragraphs below it. ]
4c793fe3 296
ee0887a9 297=head2 New Platforms
0c692eed 298
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299XXX List any platforms that this version of perl compiles on, that previous
300versions did not. These will either be enabled by new files in the F<hints/>
301directories, or new subdirectories and F<README> files at the top level of the
302source tree.
0c692eed 303
ee0887a9 304=over 4
0c692eed 305
ee0887a9 306=item XXX-some-platform
0c692eed 307
ee0887a9 308XXX
0c692eed 309
ee0887a9 310=back
0c692eed 311
ee0887a9 312=head2 Discontinued Platforms
4c793fe3 313
ee0887a9 314XXX List any platforms that this version of perl no longer compiles on.
8ebb9810 315
ee0887a9 316=over 4
8ebb9810 317
ee0887a9 318=item XXX-some-platform
48c1efd2 319
ee0887a9 320XXX
48c1efd2 321
ee0887a9 322=back
44428a46 323
ee0887a9 324=head2 Platform-Specific Notes
44428a46 325
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326XXX List any changes for specific platforms. This could include configuration
327and compilation changes or changes in portability/compatibility. However,
328changes within modules for platforms should generally be listed in the
329L</Modules and Pragmata> section.
f4beb78f 330
ee0887a9 331=over 4
f4beb78f 332
ee0887a9 333=item XXX-some-platform
ccb45ef4 334
ee0887a9 335XXX
ccb45ef4 336
ee0887a9 337=back
85318b69 338
ee0887a9 339=head1 Internal Changes
85318b69 340
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341XXX Changes which affect the interface available to C<XS> code go here.
342Other significant internal changes for future core maintainers should
343be noted as well.
85318b69 344
ee0887a9 345[ List each test improvement as a =item entry ]
80b6a949 346
ee0887a9 347=over 4
80b6a949 348
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349=item *
350
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351See L</Regular expressions retain their localeness when interpolated>,
352above.
e2babdfb 353
ee0887a9 354=back
e2babdfb 355
ee0887a9 356=head1 Selected Bug Fixes
e2babdfb 357
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358XXX Important bug fixes in the core language are summarised here.
359Bug fixes in files in F<ext/> and F<lib/> are best summarised in
360L</Modules and Pragmata>.
e2babdfb 361
ee0887a9 362[ List each fix as a =item entry ]
346e4e56 363
ee0887a9 364=over 4
346e4e56 365
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366=item *
367
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368A regular expression match in the right-hand side of a global substitution
369(C<s///g>) that is in the same scope will no longer cause match variables
370to have the wrong values on subsequent iterations. This can happen when an
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371array or hash subscript is interpolated in the right-hand side, as in
372C<s|(.)|@a{ print($1), /./ }|g>
373L<[perl #19078]|http://rt.perl.org/rt3//Public/Bug/Display.html?id=19078>.
374
375=item *
376
377Constant-folding used to cause
378
379 $text =~ ( 1 ? /phoo/ : /bear/)
380
381to turn into
382
383 $text =~ /phoo/
384
385at compile time. Now it correctly matches against C<$_>
386L<[perl #20444]|http://rt.perl.org/rt3//Public/Bug/Display.html?id=20444>.
78846812 387
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388=item *
389
390Parsing Perl code (either with string C<eval> or by loading modules) from
391within a C<UNITCHECK> block no longer causes the interpreter to crash
392L<[perl #70614]|http://rt.perl.org/rt3//Public/Bug/Display.html?id=70614>.
393
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394=item *
395
396When C<-d> is used on the shebang (C<#!>) line, the debugger now has access
397to the lines of the main program. In the past, this sometimes worked and
398sometimes did not, depending on what order things happened to be arranged
399in memory.
400
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401=back
402
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403=head1 Known Problems
404
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405XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
406tests that had to be C<TODO>ed for the release would be noted here, unless
407they were specific to a particular platform (see below).
962fbe1d 408
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409This is a list of some significant unfixed bugs, which are regressions
410from either 5.XXX.XXX or 5.XXX.XXX.
962fbe1d 411
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412[ List each fix as a =item entry ]
413
414=over 4
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415
416=item *
417
ee0887a9 418XXX
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419
420=back
421
ee0887a9 422=head1 Obituary
4c793fe3 423
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424XXX If any significant core contributor has died, we've added a short obituary
425here.
0195fb5f 426
ee0887a9 427=head1 Acknowledgements
0195fb5f 428
ee0887a9 429XXX The list of people to thank goes here.
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430
431=head1 Reporting Bugs
432
433If you find what you think is a bug, you might check the articles
434recently posted to the comp.lang.perl.misc newsgroup and the perl
435bug database at http://rt.perl.org/perlbug/ . There may also be
436information at http://www.perl.org/ , the Perl Home Page.
437
438If you believe you have an unreported bug, please run the B<perlbug>
439program included with your release. Be sure to trim your bug down
440to a tiny but sufficient test case. Your bug report, along with the
441output of C<perl -V>, will be sent off to perlbug@perl.org to be
442analysed by the Perl porting team.
443
444If the bug you are reporting has security implications, which make it
445inappropriate to send to a publicly archived mailing list, then please send
ee0887a9 446it to perl5-security-report@perl.org. This points to a closed subscription
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447unarchived mailing list, which includes all the core committers, who be able
448to help assess the impact of issues, figure out a resolution, and help
449co-ordinate the release of patches to mitigate or fix the problem across all
ee0887a9 450platforms on which Perl is supported. Please only use this address for
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451security issues in the Perl core, not for modules independently
452distributed on CPAN.
453
454=head1 SEE ALSO
455
456The F<Changes> file for an explanation of how to view exhaustive details
457on what changed.
458
459The F<INSTALL> file for how to build Perl.
460
461The F<README> file for general stuff.
462
463The F<Artistic> and F<Copying> files for copyright information.
464
465=cut