1PERL5161DELTA(1) Perl Programmers Reference Guide PERL5161DELTA(1)
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6 perl5161delta - what is new for perl v5.16.1
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9 This document describes differences between the 5.16.0 release and the
10 5.16.1 release.
11 If you are upgrading from an earlier release such as 5.14.0, first read
13 perl5160delta, which describes differences between 5.14.0 and 5.16.0.
14
16 an off-by-two error in Scalar-List-Util has been fixed
17 The bugfix was in Scalar-List-Util 1.23_04, and perl 5.16.1 includes
18 Scalar-List-Util 1.25.
19
21 There are no changes intentionally incompatible with 5.16.0 If any
22 exist, they are bugs, and we request that you submit a report. See
23 "Reporting Bugs" below.
24
26 Updated Modules and Pragmata
27 • Scalar::Util and List::Util have been upgraded from version 1.23 to
28 version 1.25.
29 • B::Deparse has been updated from version 1.14 to 1.14_01. An
31 "uninitialized" warning emitted by B::Deparse has been squashed
32 [perl #113464].
33
35 • Building perl with some Windows compilers used to fail due to a
36 problem with miniperl's "glob" operator (which uses the "perlglob"
37 program) deleting the PATH environment variable [perl #113798].
38
40 Platform-Specific Notes
41 VMS All C header files from the top-level directory of the distribution
42 are now installed on VMS, providing consistency with a long-
43 standing practice on other platforms. Previously only a subset were
44 installed, which broke non-core extension builds for extensions
45 that depended on the missing include files.
46
48 • A regression introduced in Perl v5.16.0 involving
49 "tr/SEARCHLIST/REPLACEMENTLIST/" has been fixed. Only the first
50 instance is supposed to be meaningful if a character appears more
51 than once in "SEARCHLIST". Under some circumstances, the final
52 instance was overriding all earlier ones. [perl #113584]
53 • "B::COP::stashlen" has been added. This provides access to an
55 internal field added in perl 5.16 under threaded builds. It was
56 broken at the last minute before 5.16 was released [perl #113034].
57 • The re pragma will no longer clobber $_. [perl #113750]
59 • Unicode 6.1 published an incorrect alias for one of the
61 Canonical_Combining_Class property's values (which range between 0
62 and 254). The alias "CCC133" should have been "CCC132". Perl now
63 overrides the data file furnished by Unicode to give the correct
64 value.
65 • Duplicating scalar filehandles works again. [perl #113764]
67 • Under threaded perls, a runtime code block in a regular expression
69 could corrupt the package name stored in the op tree, resulting in
70 bad reads in "caller", and possibly crashes [perl #113060].
71 • For efficiency's sake, many operators and built-in functions return
73 the same scalar each time. Lvalue subroutines and subroutines in
74 the CORE:: namespace were allowing this implementation detail to
75 leak through. "print &CORE::uc("a"), &CORE::uc("b")" used to print
76 "BB". The same thing would happen with an lvalue subroutine
77 returning the return value of "uc". Now the value is copied in
78 such cases [perl #113044].
79 • "__SUB__" now works in special blocks ("BEGIN", "END", etc.).
81 • Formats that reference lexical variables from outside no longer
83 result in crashes.
84
86 There are no new known problems, but consult "Known Problems" in
87 perl5160delta to see those identified in the 5.16.0 release.
88
90 Perl 5.16.1 represents approximately 2 months of development since Perl
91 5.16.0 and contains approximately 14,000 lines of changes across 96
92 files from 8 authors.
93 Perl continues to flourish into its third decade thanks to a vibrant
95 community of users and developers. The following people are known to
96 have contributed the improvements that became Perl 5.16.1:
97 Chris 'BinGOs' Williams, Craig A. Berry, Father Chrysostomos, Karl
99 Williamson, Paul Johnson, Reini Urban, Ricardo Signes, Tony Cook.
100 The list above is almost certainly incomplete as it is automatically
102 generated from version control history. In particular, it does not
103 include the names of the (very much appreciated) contributors who
104 reported issues to the Perl bug tracker.
105 Many of the changes included in this version originated in the CPAN
107 modules included in Perl's core. We're grateful to the entire CPAN
108 community for helping Perl to flourish.
109 For a more complete list of all of Perl's historical contributors,
111 please see the AUTHORS file in the Perl source distribution.
112
114 If you find what you think is a bug, you might check the articles
115 recently posted to the comp.lang.perl.misc newsgroup and the perl bug
116 database at http://rt.perl.org/perlbug/ . There may also be
117 information at http://www.perl.org/ , the Perl Home Page.
118 If you believe you have an unreported bug, please run the perlbug
120 program included with your release. Be sure to trim your bug down to a
121 tiny but sufficient test case. Your bug report, along with the output
122 of "perl -V", will be sent off to perlbug@perl.org to be analysed by
123 the Perl porting team.
124 If the bug you are reporting has security implications, which make it
126 inappropriate to send to a publicly archived mailing list, then please
127 send it to perl5-security-report@perl.org. This points to a closed
128 subscription unarchived mailing list, which includes all the core
129 committers, who will be able to help assess the impact of issues,
130 figure out a resolution, and help co-ordinate the release of patches to
131 mitigate or fix the problem across all platforms on which Perl is
132 supported. Please only use this address for security issues in the Perl
133 core, not for modules independently distributed on CPAN.
134
136 The Changes file for an explanation of how to view exhaustive details
137 on what changed.
138 The INSTALL file for how to build Perl.
140 The README file for general stuff.
142 The Artistic and Copying files for copyright information.
144perl v5.38.2 2023-11-30 PERL5161DELTA(1)