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Tick off 5.27.5
[perl5.git] / pod / perldelta.pod
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1=encoding utf8
2
3=head1 NAME
4
a8ba758d 5perldelta - what is new for perl v5.27.5
89853d76 6
b5cbfe35 7=head1 DESCRIPTION
89853d76 8
a8ba758d 9This document describes differences between the 5.27.4 release and the 5.27.5
b5cbfe35 10release.
89853d76 11
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12If you are upgrading from an earlier release such as 5.27.3, first read
13L<perl5274delta>, which describes differences between 5.27.3 and 5.27.4.
14
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15=head1 Performance Enhancements
16
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17=over 4
18
19=item *
20
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21Calls to C<require> for an already loaded module are now slightly faster.
22L<[perl #132171]|https://rt.perl.org/Public/Bug/Display.html?id=132171>
d912eab8 23
c83a3d01 24=back
d912eab8 25
c83a3d01 26=head1 Modules and Pragmata
af94b3ac 27
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28=head2 Updated Modules and Pragmata
29
30=over 4
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31
32=item *
33
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34L<arybase> has been upgraded from version 0.13 to 0.14.
35
36=item *
37
38L<B> has been upgraded from version 1.69 to 1.70.
39
40=item *
41
42L<B::Concise> has been upgraded from version 1.001 to 1.002.
43
44=item *
45
46L<B::Deparse> has been upgraded from version 1.42 to 1.43.
47
48=item *
49
50L<Config::Perl::V> has been upgraded from version 0.28 to 0.29.
51
52=item *
53
54L<Digest::SHA> has been upgraded from version 5.96 to 5.98.
55
56=item *
57
58L<Encode> has been upgraded from version 2.92 to 2.93.
59
60=item *
61
62L<encoding> has been upgraded from version 2.20 to 2.21.
63
64=item *
65
66L<File::Fetch> has been upgraded from version 0.52 to 0.54.
67
68=item *
69
70L<File::Path> has been upgraded from version 2.14 to 2.15.
71
72=item *
73
74L<List::Util> has been upgraded from version 1.48 to 1.49.
75
76=item *
77
78L<Locale::Codes> has been upgraded from version 3.52 to 3.54.
79
80=item *
81
82L<Math::BigInt> has been upgraded from version 1.999806 to 1.999811.
83
84=item *
85
86L<Math::BigInt::FastCalc> has been upgraded from version 0.5005 to 0.5006.
87
88=item *
89
90L<Module::CoreList> has been upgraded from version 5.20170920 to 5.20171020.
91
92=item *
93
94L<NEXT> has been upgraded from version 0.67 to 0.67_01.
95
96=item *
97
98L<Pod::Perldoc> has been upgraded from version 3.28 to 3.2801.
99
100=item *
101
102L<POSIX> has been upgraded from version 1.77 to 1.78.
103
104=item *
105
106L<Scalar::Util> has been upgraded from version 1.48 to 1.49.
107
108=item *
109
110L<Sub::Util> has been upgraded from version 1.48 to 1.49.
111
112=item *
113
114L<Sys::Hostname> has been upgraded from version 1.20 to 1.21.
115
116=item *
117
118L<Test::Simple> has been upgraded from version 1.302073 to 1.302103.
119
120=item *
121
122L<Time::HiRes> has been upgraded from version 1.9743 to 1.9746.
123
124=item *
125
126L<Time::Piece> has been upgraded from version 1.3201 to 1.3202.
cf663f87 127
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128=back
129
a8ba758d 130=head1 Platform Support
cf663f87 131
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132=head2 Platform-Specific Notes
133
a8ba758d 134=over 4
9ef07b78 135
77baf8eb 136=item CentOS
a8ba758d 137
77baf8eb 138Compilation on CentOS 5 is now fixed.
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139
140=back
141
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142=head1 Selected Bug Fixes
143
a8ba758d 144=over 4
cf663f87 145
21741043 146=item *
c83a3d01 147
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148Calling L<exec PROGRAM LIST|perlfunc/exec PROGRAM LIST> with an empty C<LIST>
149has been fixed. This should call C<execvp()> with an empty C<argv> array
150(containing only the terminating C<NULL> pointer), but was instead just
151returning false (and not setting L<C<$!>|perlvar/$!>).
152L<[perl #131730]|https://rt.perl.org/Public/Bug/Display.html?id=131730>
a8ba758d 153
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154=item *
155
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156The C<gv_fetchmeth_sv> C function stopped working properly in Perl 5.22 when
157fetching a constant with a UTF-8 name if that constant subroutine was stored in
158the stash as a simple scalar reference, rather than a full typeglob. This has
159been corrected.
160
161=item *
162
163Single-letter debugger commands followed by an argument which starts with
164punctuation (e.g. C<p$^V> and C<x@ARGV>) now work again. They had been
165wrongly requiring a space between the command and the argument.
166L<[perl #120174]|https://rt.perl.org/Public/Bug/Display.html?id=120174>
167
168=item *
169
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170L<splice|perlfunc/splice ARRAY,OFFSET,LENGTH,LIST> now throws an exception
171("Modification of a read-only value attempted") when modifying a read-only
172array. Until now it had been silently modifying the array. The new behaviour
173is consistent with the behaviour of L<push|perlfunc/push ARRAY,LIST> and
174L<unshift|perlfunc/unshift ARRAY,LIST>.
77baf8eb 175L<[perl #131000]|https://rt.perl.org/Public/Bug/Display.html?id=131000>
834e1dc6 176
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177=back
178
a8ba758d 179=head1 Acknowledgements
8abafd33 180
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181Perl 5.27.5 represents approximately 4 weeks of development since Perl 5.27.4
182and contains approximately 29,000 lines of changes across 430 files from 20
183authors.
8abafd33 184
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185Excluding auto-generated files, documentation and release tools, there were
186approximately 17,000 lines of changes to 340 .pm, .t, .c and .h files.
187
188Perl continues to flourish into its third decade thanks to a vibrant community
189of users and developers. The following people are known to have contributed
190the improvements that became Perl 5.27.5:
191
192Aaron Crane, Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari
193Mannsåker, Dmitry Ulanov, Dominic Hargreaves, Father Chrysostomos, H.Merijn
194Brand, James E Keenan, John P. Linderman, John SJ Anderson, Lukas Mai, Nicolas
195R., Sawyer X, Smylers, Steve Hay, Tom Hukins, Tony Cook, Yves Orton, Zefram.
196
197The list above is almost certainly incomplete as it is automatically generated
198from version control history. In particular, it does not include the names of
199the (very much appreciated) contributors who reported issues to the Perl bug
200tracker.
201
202Many of the changes included in this version originated in the CPAN modules
203included in Perl's core. We're grateful to the entire CPAN community for
204helping Perl to flourish.
205
206For a more complete list of all of Perl's historical contributors, please see
207the F<AUTHORS> file in the Perl source distribution.
f5b73711 208
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209=head1 Reporting Bugs
210
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211If you find what you think is a bug, you might check the perl bug database
212at L<https://rt.perl.org/> . There may also be information at
213L<http://www.perl.org/> , the Perl Home Page.
44691e6f 214
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215If you believe you have an unreported bug, please run the L<perlbug> program
216included with your release. Be sure to trim your bug down to a tiny but
217sufficient test case. Your bug report, along with the output of C<perl -V>,
b5cbfe35 218will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
44691e6f 219
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220If the bug you are reporting has security implications which make it
221inappropriate to send to a publicly archived mailing list, then see
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222L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
223for details of how to report the issue.
44691e6f 224
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225=head1 Give Thanks
226
227If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
228you can do so by running the C<perlthanks> program:
229
230 perlthanks
231
232This will send an email to the Perl 5 Porters list with your show of thanks.
233
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234=head1 SEE ALSO
235
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236The F<Changes> file for an explanation of how to view exhaustive details on
237what changed.
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238
239The F<INSTALL> file for how to build Perl.
240
241The F<README> file for general stuff.
242
243The F<Artistic> and F<Copying> files for copyright information.
244
245=cut