1PERL5320DELTA(1) Perl Programmers Reference Guide PERL5320DELTA(1)
2
6 perl5320delta - what is new for perl v5.32.0
7
9 This document describes differences between the 5.30.0 release and the
10 5.32.0 release.
11 If you are upgrading from an earlier release such as 5.28.0, first read
13 perl5300delta, which describes differences between 5.28.0 and 5.30.0.
14
16 The isa Operator
17 A new experimental infix operator called "isa" tests whether a given
18 object is an instance of a given class or a class derived from it:
19 if( $obj isa Package::Name ) { ... }
21 For more detail see "Class Instance Operator" in perlop.
23 Unicode 13.0 is supported
25 See <https://www.unicode.org/versions/Unicode13.0.0/> for details.
26 Chained comparisons capability
28 Some comparison operators, as their associativity, chain with some
29 operators of the same precedence (but never with operators of different
30 precedence).
31 if ( $x < $y <= $z ) {...}
33 behaves exactly like:
35 if ( $x < $y && $y <= $z ) {...}
37 (assuming that "$y" is as simple a scalar as it looks.)
39 You can read more about this in perlop under "Operator Precedence and
41 Associativity" in perlop.
42 New Unicode properties "Identifier_Status" and "Identifier_Type" supported
44 Unicode has revised its regular expression requirements:
45 <https://www.unicode.org/reports/tr18/tr18-21.html>. As part of that
46 they are wanting more properties to be exposed, ones that aren't part
47 of the strict UCD (Unicode character database). These two are used for
48 examining inputs for security purposes. Details on their usage is at
49 <https://www.unicode.org/reports/tr39/>.
50 It is now possible to write "qr/\p{Name=...}/", or
52 "qr!\p{na=/(SMILING|GRINNING) FACE/}!"
53 The Unicode Name property is now accessible in regular expression
54 patterns, as an alternative to "\N{...}". A comparison of the two
55 methods is given in "Comparison of \N{...} and \p{name=...}" in
56 perlunicode.
57 The second example above shows that wildcard subpatterns are also
59 usable in this property. See "Wildcards in Property Values" in
60 perlunicode.
61 Improvement of "POSIX::mblen()", "mbtowc", and "wctomb"
63 The "POSIX::mblen()", "mbtowc", and "wctomb" functions now work on
64 shift state locales and are thread-safe on C99 and above compilers when
65 executed on a platform that has locale thread-safety; the length
66 parameters are now optional.
67 These functions are always executed under the current C language
69 locale. (See perllocale.) Most locales are stateless, but a few,
70 notably the very rarely encountered ISO 2022, maintain a state between
71 calls to these functions. Previously the state was cleared on every
72 call, but now the state is not reset unless the appropriate parameter
73 is "undef".
74 On threaded perls, the C99 functions mbrlen(3), mbrtowc(3), and
76 wcrtomb(3), when available, are substituted for the plain functions.
77 This makes these functions thread-safe when executing on a locale
78 thread-safe platform.
79 The string length parameters in "mblen" and "mbtowc" are now optional;
81 useful only if you wish to restrict the length parsed in the source
82 string to less than the actual length.
83 Alpha assertions are no longer experimental
85 See "(*pla:pattern)" in perlre, "(*plb:pattern)" in perlre,
86 "(*nla:pattern)" in perlre>, and "(*nlb:pattern)" in perlre. Use of
87 these no longer generates a warning; existing code that disables the
88 warning category "experimental::alpha_assertions" will continue to work
89 without any changes needed. Enabling the category has no effect.
90 Script runs are no longer experimental
92 See "Script Runs" in perlre. Use of these no longer generates a
93 warning; existing code that disables the warning category
94 "experimental::script_run" will continue to work without any changes
95 needed. Enabling the category has no effect.
96 Feature checks are now faster
98 Previously feature checks in the parser required a hash lookup when
99 features were set outside of a feature bundle, this has been optimized
100 to a bit mask check. [GH #17229
101 <https://github.com/Perl/perl5/issues/17229>]
102 Perl is now developed on GitHub
104 Perl is now developed on GitHub. You can find us at
105 <https://github.com/Perl/perl5>.
106 Non-security bugs should now be reported via GitHub. Security issues
108 should continue to be reported as documented in perlsec.
109 Compiled patterns can now be dumped before optimization
111 This is primarily useful for tracking down bugs in the regular
112 expression compiler. This dump happens on "-DDEBUGGING" perls, if you
113 specify "-Drv" on the command line; or on any perl if the pattern is
114 compiled within the scope of "use re qw(Debug DUMP_PRE_OPTIMIZE)" or
115 "use re qw(Debug COMPILE EXTRA)". (All but the second case display
116 other information as well.)
117
119 [CVE-2020-10543] Buffer overflow caused by a crafted regular expression
120 A signed "size_t" integer overflow in the storage space calculations
121 for nested regular expression quantifiers could cause a heap buffer
122 overflow in Perl's regular expression compiler that overwrites memory
123 allocated after the regular expression storage space with attacker
124 supplied data.
125 The target system needs a sufficient amount of memory to allocate
127 partial expansions of the nested quantifiers prior to the overflow
128 occurring. This requirement is unlikely to be met on 64-bit systems.
129 Discovered by: ManhND of The Tarantula Team, VinCSS (a member of
131 Vingroup).
132 [CVE-2020-10878] Integer overflow via malformed bytecode produced by a
134 crafted regular expression
135 Integer overflows in the calculation of offsets between instructions
136 for the regular expression engine could cause corruption of the
137 intermediate language state of a compiled regular expression. An
138 attacker could abuse this behaviour to insert instructions into the
139 compiled form of a Perl regular expression.
140 Discovered by: Hugo van der Sanden and Slaven Rezic.
142 [CVE-2020-12723] Buffer overflow caused by a crafted regular expression
144 Recursive calls to "S_study_chunk()" by Perl's regular expression
145 compiler to optimize the intermediate language representation of a
146 regular expression could cause corruption of the intermediate language
147 state of a compiled regular expression.
148 Discovered by: Sergey Aleynikov.
150 Additional Note
152 An application written in Perl would only be vulnerable to any of the
153 above flaws if it evaluates regular expressions supplied by the
154 attacker. Evaluating regular expressions in this fashion is known to
155 be dangerous since the regular expression engine does not protect
156 against denial of service attacks in this usage scenario.
157
159 Certain pattern matching features are now prohibited in compiling Unicode
160 property value wildcard subpatterns
161 These few features are either inappropriate or interfere with the
162 algorithm used to accomplish this task. The complete list is in
163 "Wildcards in Property Values" in perlunicode.
164 Unused functions "POSIX::mbstowcs" and "POSIX::wcstombs" are removed
166 These functions could never have worked due to a defective interface
167 specification. There is clearly no demand for them, given that no one
168 has ever complained in the many years the functions were claimed to be
169 available, hence so-called "support" for them is now dropped.
170 A bug fix for "(?[...])" may have caused some patterns to no longer compile
172 See "Selected Bug Fixes". The heuristics previously used may have let
173 some constructs compile (perhaps not with the programmer's intended
174 effect) that should have been errors. None are known, but it is
175 possible that some erroneous constructs no longer compile.
176 "\p{user-defined}" properties now always override official Unicode ones
178 Previously, if and only if a user-defined property was declared prior
179 to the compilation of the regular expression pattern that contains it,
180 its definition was used instead of any official Unicode property with
181 the same name. Now, it always overrides the official property. This
182 change could break existing code that relied (likely unwittingly) on
183 the previous behavior. Without this fix, if Unicode released a new
184 version with a new property that happens to have the same name as the
185 one you had long been using, your program would break when you upgraded
186 to a perl that used that new Unicode version. See "User-Defined
187 Character Properties" in perlunicode. [GH #17205
188 <https://github.com/Perl/perl5/issues/17205>]
189 Modifiable variables are no longer permitted in constants
191 Code like:
192 my $var;
194 $sub = sub () { $var };
195 where $var is referenced elsewhere in some sort of modifiable context
197 now produces an exception when the sub is defined.
198 This error can be avoided by adding a return to the sub definition:
200 $sub = sub () { return $var };
202 This has been deprecated since Perl 5.22. [perl #134138
204 <https://rt.perl.org/Ticket/Display.html?id=134138>]
205 Use of "vec" on strings with code points above 0xFF is forbidden
207 Such strings are represented internally in UTF-8, and "vec" is a bit-
208 oriented operation that will likely give unexpected results on those
209 strings. This was deprecated in perl 5.28.0.
210 Use of code points over 0xFF in string bitwise operators
212 Some uses of these were already illegal after a previous deprecation
213 cycle. The remaining uses are now prohibited, having been deprecated in
214 perl 5.28.0. See perldeprecation.
215 "Sys::Hostname::hostname()" does not accept arguments
217 This usage was deprecated in perl 5.28.0 and is now fatal.
218 Plain "0" string now treated as a number for range operator
220 Previously a range "0" .. "-1" would produce a range of numeric strings
221 from "0" through "99"; this now produces an empty list, just as "0 ..
222 -1" does. This also means that "0" .. "9" now produces a list of
223 integers, where previously it would produce a list of strings.
224 This was due to a special case that treated strings starting with "0"
226 as strings so ranges like "00" .. "03" produced "00", "01", "02", "03",
227 but didn't specially handle the string "0". [perl #133695
228 <https://rt.perl.org/Ticket/Display.html?id=133695>]
229 "\K" now disallowed in look-ahead and look-behind assertions
231 This was disallowed because it causes unexpected behaviour, and no-one
232 could define what the desired behaviour should be. [perl #124256
233 <https://rt.perl.org/Ticket/Display.html?id=124256>]
234
236 • "my_strnlen" has been sped up for systems that don't have their own
237 "strnlen" implementation.
238 • "grok_bin_oct_hex" (and so, "grok_bin", "grok_oct", and "grok_hex")
240 have been sped up.
241 • "grok_number_flags" has been sped up.
243 • "sort" is now noticeably faster in cases such as "sort {$a <=> $b}"
245 or "sort {$b <=> $a}". [GH #17608
246 <https://github.com/Perl/perl5/pull/17608>]
247
249 Updated Modules and Pragmata
250 • Archive::Tar has been upgraded from version 2.32 to 2.36.
251 • autodie has been upgraded from version 2.29 to 2.32.
253 • B has been upgraded from version 1.76 to 1.80.
255 • B::Deparse has been upgraded from version 1.49 to 1.54.
257 • Benchmark has been upgraded from version 1.22 to 1.23.
259 • charnames has been upgraded from version 1.45 to 1.48.
261 • Class::Struct has been upgraded from version 0.65 to 0.66.
263 • Compress::Raw::Bzip2 has been upgraded from version 2.084 to 2.093.
265 • Compress::Raw::Zlib has been upgraded from version 2.084 to 2.093.
267 • CPAN has been upgraded from version 2.22 to 2.27.
269 • DB_File has been upgraded from version 1.843 to 1.853.
271 • Devel::PPPort has been upgraded from version 3.52 to 3.57.
273 The test files generated on Win32 are now identical to when they
275 are generated on POSIX-like systems.
276 • diagnostics has been upgraded from version 1.36 to 1.37.
278 • Digest::MD5 has been upgraded from version 2.55 to 2.55_01.
280 • Dumpvalue has been upgraded from version 1.18 to 1.21.
282 Previously, when dumping elements of an array and encountering an
284 undefined value, the string printed would have been "empty array".
285 This has been changed to what was apparently originally intended:
286 "empty slot".
287 • DynaLoader has been upgraded from version 1.45 to 1.47.
289 • Encode has been upgraded from version 3.01 to 3.06.
291 • encoding has been upgraded from version 2.22 to 3.00.
293 • English has been upgraded from version 1.10 to 1.11.
295 • Exporter has been upgraded from version 5.73 to 5.74.
297 • ExtUtils::CBuilder has been upgraded from version 0.280231 to
299 0.280234.
300 • ExtUtils::MakeMaker has been upgraded from version 7.34 to 7.44.
302 • feature has been upgraded from version 1.54 to 1.58.
304 A new "indirect" feature has been added, which is enabled by
306 default but allows turning off indirect object syntax.
307 • File::Find has been upgraded from version 1.36 to 1.37.
309 On Win32, the tests no longer require either a file in the drive
311 root directory, or a writable root directory.
312 • File::Glob has been upgraded from version 1.32 to 1.33.
314 • File::stat has been upgraded from version 1.08 to 1.09.
316 • Filter::Simple has been upgraded from version 0.95 to 0.96.
318 • Getopt::Long has been upgraded from version 2.5 to 2.51.
320 • Hash::Util has been upgraded from version 0.22 to 0.23.
322 The Synopsis has been updated as the example code stopped working
324 with newer perls. [GH #17399
325 <https://github.com/Perl/perl5/issues/17399>]
326 • I18N::Langinfo has been upgraded from version 0.18 to 0.19.
328 • I18N::LangTags has been upgraded from version 0.43 to 0.44.
330 Document the "IGNORE_WIN32_LOCALE" environment variable.
332 • IO has been upgraded from version 1.40 to 1.43.
334 IO::Socket no longer caches a zero protocol value, since this
336 indicates that the implementation will select a protocol. This
337 means that on platforms that don't implement "SO_PROTOCOL" for a
338 given socket type the protocol method may return "undef".
339 The supplied TO is now always honoured on calls to the "send()"
341 method. [perl #133936
342 <https://rt.perl.org/Ticket/Display.html?id=133936>]
343 • IO-Compress has been upgraded from version 2.084 to 2.093.
345 • IPC::Cmd has been upgraded from version 1.02 to 1.04.
347 • IPC::Open3 has been upgraded from version 1.20 to 1.21.
349 • JSON::PP has been upgraded from version 4.02 to 4.04.
351 • Math::BigInt has been upgraded from version 1.999816 to 1.999818.
353 • Math::BigInt::FastCalc has been upgraded from version 0.5008 to
355 0.5009.
356 • Module::CoreList has been upgraded from version 5.20190522 to
358 5.20200620.
359 • Module::Load::Conditional has been upgraded from version 0.68 to
361 0.70.
362 • Module::Metadata has been upgraded from version 1.000036 to
364 1.000037.
365 • mro has been upgraded from version 1.22 to 1.23.
367 • Net::Ping has been upgraded from version 2.71 to 2.72.
369 • Opcode has been upgraded from version 1.43 to 1.47.
371 • open has been upgraded from version 1.11 to 1.12.
373 • overload has been upgraded from version 1.30 to 1.31.
375 • parent has been upgraded from version 0.237 to 0.238.
377 • perlfaq has been upgraded from version 5.20190126 to 5.20200523.
379 • PerlIO has been upgraded from version 1.10 to 1.11.
381 • PerlIO::encoding has been upgraded from version 0.27 to 0.28.
383 • PerlIO::via has been upgraded from version 0.17 to 0.18.
385 • Pod::Html has been upgraded from version 1.24 to 1.25.
387 • Pod::Simple has been upgraded from version 3.35 to 3.40.
389 • podlators has been upgraded from version 4.11 to 4.14.
391 • POSIX has been upgraded from version 1.88 to 1.94.
393 • re has been upgraded from version 0.37 to 0.40.
395 • Safe has been upgraded from version 2.40 to 2.41.
397 • Scalar::Util has been upgraded from version 1.50 to 1.55.
399 • SelfLoader has been upgraded from version 1.25 to 1.26.
401 • Socket has been upgraded from version 2.027 to 2.029.
403 • Storable has been upgraded from version 3.15 to 3.21.
405 Use of "note()" from Test::More is now optional in tests. This
407 works around a circular dependency with Test::More when installing
408 on very old perls from CPAN.
409 Vstring magic strings over 2GB are now disallowed.
411 Regular expressions objects weren't properly counted for object id
413 purposes on retrieve. This would corrupt the resulting structure,
414 or cause a runtime error in some cases. [perl #134179
415 <https://rt.perl.org/Ticket/Display.html?id=134179>]
416 • Sys::Hostname has been upgraded from version 1.22 to 1.23.
418 • Sys::Syslog has been upgraded from version 0.35 to 0.36.
420 • Term::ANSIColor has been upgraded from version 4.06 to 5.01.
422 • Test::Simple has been upgraded from version 1.302162 to 1.302175.
424 • Thread has been upgraded from version 3.04 to 3.05.
426 • Thread::Queue has been upgraded from version 3.13 to 3.14.
428 • threads has been upgraded from version 2.22 to 2.25.
430 • threads::shared has been upgraded from version 1.60 to 1.61.
432 • Tie::File has been upgraded from version 1.02 to 1.06.
434 • Tie::Hash::NamedCapture has been upgraded from version 0.10 to
436 0.13.
437 • Tie::Scalar has been upgraded from version 1.04 to 1.05.
439 • Tie::StdHandle has been upgraded from version 4.5 to 4.6.
441 • Time::HiRes has been upgraded from version 1.9760 to 1.9764.
443 Removed obsolete code such as support for pre-5.6 perl and classic
445 MacOS. [perl #134288
446 <https://rt.perl.org/Ticket/Display.html?id=134288>]
447 • Time::Piece has been upgraded from version 1.33 to 1.3401.
449 • Unicode::Normalize has been upgraded from version 1.26 to 1.27.
451 • Unicode::UCD has been upgraded from version 0.72 to 0.75.
453 • VMS::Stdio has been upgraded from version 2.44 to 2.45.
455 • warnings has been upgraded from version 1.44 to 1.47.
457 • Win32 has been upgraded from version 0.52 to 0.53.
459 • Win32API::File has been upgraded from version 0.1203 to 0.1203_01.
461 • XS::APItest has been upgraded from version 1.00 to 1.09.
463 Removed Modules and Pragmata
465 • Pod::Parser has been removed from the core distribution. It still
466 is available for download from CPAN. This resolves [perl #119439
467 <https://rt.perl.org/Ticket/Display.html?id=119439>].
468
470 Changes to Existing Documentation
471 We have attempted to update the documentation to reflect the changes
472 listed in this document. If you find any we have missed, open an issue
473 at <https://github.com/Perl/perl5/issues>.
474 Additionally, the following selected changes have been made:
476 perldebguts
478 • Simplify a few regnode definitions
480 Update "BOUND" and "NBOUND" definitions.
482 • Add ANYOFHs regnode
484 This node is like "ANYOFHb", but is used when more than one leading
486 byte is the same in all the matched code points.
487 "ANYOFHb" is used to avoid having to convert from UTF-8 to code
489 point for something that won't match. It checks that the first byte
490 in the UTF-8 encoded target is the desired one, thus ruling out
491 most of the possible code points.
492 perlapi
494 • "sv_2pvbyte" updated to mention it will croak if the SV cannot be
496 downgraded.
497 • "sv_setpvn" updated to mention that the UTF-8 flag will not be
499 changed by this function, and a terminating NUL byte is guaranteed.
500 • Documentation for "PL_phase" has been added.
502 • The documentation for "grok_bin", "grok_oct", and "grok_hex" has
504 been updated and clarified.
505 perldiag
507 • Add documentation for experimental 'isa' operator
509 (S experimental::isa) This warning is emitted if you use the
511 ("isa") operator. This operator is currently experimental and its
512 behaviour may change in future releases of Perl.
513 perlfunc
515 "caller"
517 Like "__FILE__" and "__LINE__", the filename and line number
518 returned here may be altered by the mechanism described at "Plain
519 Old Comments (Not!)" in perlsyn.
520 "__FILE__"
522 It can be altered by the mechanism described at "Plain Old Comments
523 (Not!)" in perlsyn.
524 "__LINE__"
526 It can be altered by the mechanism described at "Plain Old Comments
527 (Not!)" in perlsyn.
528 "return"
530 Now mentions that you cannot return from "do BLOCK".
531 "open"
533 The "open()" section had been renovated significantly.
534 perlguts
536 • No longer suggesting using perl's "malloc". Modern system "malloc"
538 is assumed to be much better than perl's implementation now.
539 • Documentation about embed.fnc flags has been removed. embed.fnc now
541 has sufficient comments within it. Anyone changing that file will
542 see those comments first, so entries here are now redundant.
543 • Updated documentation for "UTF8f"
545 • Added missing "=for apidoc" lines
547 perlhacktips
549 • The differences between Perl strings and C strings are now
551 detailed.
552 perlintro
554 • The documentation for the repetition operator "x" have been
556 clarified. [GH #17335
557 <https://github.com/Perl/perl5/issues/17335>]
558 perlipc
560 • The documentation surrounding "open" and handle usage has been
562 modernized to prefer 3-arg open and lexical variables instead of
563 barewords.
564 • Various updates and fixes including making all examples strict-safe
566 and replacing "-w" with "use warnings".
567 perlop
569 • 'isa' operator is experimental
571 This is an experimental feature and is available when enabled by
573 "use feature 'isa'". It emits a warning in the "experimental::isa"
574 category.
575 perlpod
577 • Details of the various stacks within the perl interpreter are now
579 explained here.
580 • Advice has been added regarding the usage of "Z<>".
582 perlport
584 • Update "timegm" example to use the correct year format 1970 instead
586 of 70. [GH #16431 <https://github.com/Perl/perl5/issues/16431>]
587 perlreref
589 • Fix some typos.
591 perlvar
593 • Now recommends stringifying $] and comparing it numerically.
595 perlapi, perlintern
597 • Documentation has been added for several functions that were
599 lacking it before.
600 perlxs
602 • Suggest using "libffi" for simple library bindings via CPAN modules
604 like FFI::Platypus or FFI::Raw.
605 POSIX
607 • "setlocale" warning about threaded builds updated to note it does
609 not apply on Perl 5.28.X and later.
610 • "Posix::SigSet->new(...)" updated to state it throws an error if
612 any of the supplied signals cannot be added to the set.
613 Additionally, the following selected changes have been made:
615 Updating of links
617 • Links to the now defunct <https://search.cpan.org> site now point
619 at the equivalent <https://metacpan.org> URL. [GH #17393
620 <https://github.com/Perl/perl5/issues/17393>]
621 • The man page for ExtUtils::XSSymSet is now only installed on VMS,
623 which is the only platform the module is installed on. [GH #17424
624 <https://github.com/Perl/perl5/issues/17424>]
625 • URLs have been changed to "https://" and stale links have been
627 updated.
628 Where applicable, the URLs in the documentation have been moved
630 from using the "http://" protocol to "https://". This also affects
631 the location of the bug tracker at <https://rt.perl.org>.
632 • Some links to OS/2 libraries, Address Sanitizer and other system
634 tools had gone stale. These have been updated with working links.
635 • Some links to old email addresses on perl5-porters had gone stale.
637 These have been updated with working links.
638
640 The following additions or changes have been made to diagnostic output,
641 including warnings and fatal error messages. For the complete list of
642 diagnostic messages, see perldiag.
643 New Diagnostics
645 New Errors
646 • Expecting interpolated extended charclass in regex; marked by <--
648 HERE in m/%s/
649 This is a replacement for several error messages listed under
651 "Changes to Existing Diagnostics".
652 • "No digits found for %s literal"
654 (F) No hexadecimal digits were found following "0x" or no binary
656 digits were found following "0b".
657 New Warnings
659 • Code point 0x%X is not Unicode, and not portable
661 This is actually not a new message, but it is now output when the
663 warnings category "portable" is enabled.
664 When raised during regular expression pattern compilation, the
666 warning has extra text added at the end marking where precisely in
667 the pattern it occurred.
668 • Non-hex character '%c' terminates \x early. Resolved as "%s"
670 This replaces a warning that was much less specific, and which gave
672 false information. This new warning parallels the similar already-
673 existing one raised for "\o{}".
674 Changes to Existing Diagnostics
676 • Character following "\c" must be printable ASCII
677 ...now has extra text added at the end, when raised during regular
679 expression pattern compilation, marking where precisely in the
680 pattern it occurred.
681 • Use "%s" instead of "%s"
683 ...now has extra text added at the end, when raised during regular
685 expression pattern compilation, marking where precisely in the
686 pattern it occurred.
687 • Sequence "\c{" invalid
689 ...now has extra text added at the end, when raised during regular
691 expression pattern compilation, marking where precisely in the
692 pattern it occurred.
693 • "\c%c" is more clearly written simply as "%s"
695 ...now has extra text added at the end, when raised during regular
697 expression pattern compilation, marking where precisely in the
698 pattern it occurred.
699 • Non-octal character '%c' terminates \o early. Resolved as "%s"
701 ...now includes the phrase "terminates \o early", and has extra
703 text added at the end, when raised during regular expression
704 pattern compilation, marking where precisely in the pattern it
705 occurred. In some instances the text of the resolution has been
706 clarified.
707 • '%s' resolved to '\o{%s}%d'
709 As of Perl 5.32, this message is no longer generated. Instead,
711 "Non-octal character '%c' terminates \o early. Resolved as "%s""
712 in perldiag is used instead.
713 • Use of code point 0x%s is not allowed; the permissible max is 0x%X
715 Some instances of this message previously output the hex digits
717 "A", "B", "C", "D", "E", and "F" in lower case. Now they are all
718 consistently upper case.
719 • The following three diagnostics have been removed, and replaced by
721 "Expecting interpolated extended charclass in regex; marked by <--
722 HERE in m/%s/" : "Expecting close paren for nested extended
723 charclass in regex; marked by <-- HERE in m/%s/", "Expecting close
724 paren for wrapper for nested extended charclass in regex; marked by
725 <-- HERE in m/%s/", and "Expecting '(?flags:(?[...' in regex;
726 marked by <-- HERE in m/%s/".
727 • The "Code point 0x%X is not Unicode, and not portable" warning
729 removed the line "Code points above 0xFFFF_FFFF require larger than
730 a 32 bit word." as code points that large are no longer legal on
731 32-bit platforms.
732 • Can't use global %s in %s
734 This error message has been slightly reformatted from the original
736 "Can't use global %s in "%s"", and in particular misleading error
737 messages like "Can't use global $_ in "my"" are now rendered as
738 "Can't use global $_ in subroutine signature".
739 • Constants from lexical variables potentially modified elsewhere are
741 no longer permitted
742 This error message replaces the former "Constants from lexical
744 variables potentially modified elsewhere are deprecated. This will
745 not be allowed in Perl 5.32" to reflect the fact that this
746 previously deprecated usage has now been transformed into an
747 exception. The message's classification has also been updated from
748 D (deprecated) to F (fatal).
749 See also "Incompatible Changes".
751 • "\N{} here is restricted to one character" is now emitted in the
753 same circumstances where previously "\N{} in inverted character
754 class or as a range end-point is restricted to one character" was.
755 This is due to new circumstances having been added in Perl 5.30
757 that weren't covered by the earlier wording.
758
760 perlbug
761 • The bug tracker homepage URL now points to GitHub.
762 streamzip
764 • This is a new utility, included as part of an IO::Compress::Base
765 upgrade.
766 streamzip creates a zip file from stdin. The program will read data
768 from stdin, compress it into a zip container and, by default, write
769 a streamed zip file to stdout.
770
772 Configure
773 • For clang++, add "#include <stdlib.h>" to Configure's probes for
774 "futimes", "strtoll", "strtoul", "strtoull", "strtouq", otherwise
775 the probes would fail to compile.
776 • Use a compile and run test for "lchown" to satisfy clang++ which
778 should more reliably detect it.
779 • For C++ compilers, add "#include <stdio.h>" to Configure's probes
781 for "getpgrp" and "setpgrp" as they use printf and C++ compilers
782 may fail compilation instead of just warning.
783 • Check if the compiler can handle inline attribute.
785 • Check for character data alignment.
787 • Configure now correctly handles gcc-10. Previously it was
789 interpreting it as gcc-1 and turned on "-fpcc-struct-return".
790 • Perl now no longer probes for "d_u32align", defaulting to "define"
792 on all platforms. This check was error-prone when it was done,
793 which was on 32-bit platforms only. [perl #133495
794 <https://rt.perl.org/Ticket/Display.html?id=133495>]
795 • Documentation and hints for building perl on Z/OS (native EBCDIC)
797 have been updated. This is still a work in progress.
798 • A new probe for "malloc_usable_size" has been added.
800 • Improvements in Configure to detection in C++ and clang++. Work
802 ongoing by Andy Dougherty. [perl #134171
803 <https://rt.perl.org/Ticket/Display.html?id=134171>]
804 • autodoc.pl
806 This tool that regenerates perlintern and perlapi has been
808 overhauled significantly, restoring consistency in flags used in
809 embed.fnc and Devel::PPPort and allowing removal of many redundant
810 "=for apidoc" entries in code.
811 • The "ECHO" macro is now defined. This is used in a "dtrace" rule
813 that was originally changed for FreeBSD, and the FreeBSD make
814 apparently predefines it. The Solaris make does not predefine
815 "ECHO" which broke this rule on Solaris. [perl #134218
816 <https://rt.perl.org/Ticket/Display.html?id=134218>]
817 • Bison versions 3.1 through 3.4 are now supported.
819
821 Tests were added and changed to reflect the other additions and changes
822 in this release. Furthermore, these significant changes were made:
823 • t/run/switches.t no longer uses (and re-uses) the tmpinplace/
825 directory under t/. This may prevent spurious failures. [GH #17424
826 <https://github.com/Perl/perl5/issues/17424>]
827 • Various bugs in "POSIX::mbtowc" were fixed. Potential races with
829 other threads are now avoided, and previously the returned wide
830 character could well be garbage.
831 • Various bugs in "POSIX::wctomb" were fixed. Potential races with
833 other threads are now avoided, and previously it would segfault if
834 the string parameter was shared or hadn't been pre-allocated with a
835 string of sufficient length to hold the result.
836 • Certain test output of scalars containing control characters and
838 Unicode has been fixed on EBCDIC.
839 • t/charset_tools.pl: Avoid some work on ASCII platforms.
841 • t/re/regexp.t: Speed up many regex tests on ASCII platform
843 • t/re/pat.t: Skip tests that don't work on EBCDIC.
845
847 Discontinued Platforms
848 Windows CE
849 Support for building perl on Windows CE has now been removed.
850 Platform-Specific Notes
852 Linux
853 "cc" will be used to populate "plibpth" if "cc" is "clang". [perl
854 #134189 <https://rt.perl.org/Ticket/Display.html?id=134189>]
855 NetBSD 8.0
857 Fix compilation of Perl on NetBSD 8.0 with g++. [GH #17381
858 <https://github.com/Perl/perl5/issues/17381>]
859 Windows
861 • The configuration for "ccflags" and "optimize" are now
862 separate, as with POSIX platforms. [GH #17156
863 <https://github.com/Perl/perl5/issues/17156>]
864 • Support for building perl with Visual C++ 6.0 has now been
866 removed.
867 • The locale tests could crash on Win32 due to a Windows bug, and
869 separately due to the CRT throwing an exception if the locale
870 name wasn't validly encoded in the current code page.
871 For the second we now decode the locale name ourselves, and
873 always decode it as UTF-8. [perl #133981
874 <https://rt.perl.org/Ticket/Display.html?id=133981>]
875 • t/op/magic.t could fail if environment variables starting with
877 "FOO" already existed.
878 • MYMALLOC (PERL_MALLOC) build has been fixed.
880 Solaris
882 • "Configure" will now find recent versions of the Oracle
883 Developer Studio compiler, which are found under
884 "/opt/developerstudio*".
885 • "Configure" now uses the detected types for "gethostby*"
887 functions, allowing Perl to once again compile on certain
888 configurations of Solaris.
889 VMS
891 • With the release of the patch kit C99 V2.0, VSI has provided
892 support for a number of previously-missing C99 features. On
893 systems with that patch kit installed, Perl's configuration
894 process will now detect the presence of the header "stdint.h"
895 and the following functions: "fpclassify", "isblank", "isless",
896 "llrint", "llrintl", "llround", "llroundl", "nearbyint",
897 "round", "scalbn", and "scalbnl".
898 • "-Duse64bitint" is now the default on VMS.
900 z/OS
902 Perl 5.32 has been tested on z/OS 2.4, with the following caveats:
903 • Only static builds (the default) build reliably
905 • When using locales, z/OS does not handle the "LC_MESSAGES"
907 category properly, so when compiling perl, you should add the
908 following to your Configure options
909 ./Configure <other options> -Accflags=-DNO_LOCALE_MESSAGES
911 • z/OS does not support locales with threads, so when compiling a
913 threaded perl, you should add the following to your Configure
914 options
915 ./Configure <other Configure options> -Accflags=-DNO_LOCALE
917 • Some CPAN modules that are shipped with perl fail at least one
919 of their self-tests. These are: Archive::Tar, Config::Perl::V,
920 CPAN::Meta, CPAN::Meta::YAML, Digest::MD5, Digest::SHA, Encode,
921 ExtUtils::MakeMaker, ExtUtils::Manifest, HTTP::Tiny,
922 IO::Compress, IPC::Cmd, JSON::PP, libnet, MIME::Base64,
923 Module::Metadata, PerlIO::via-QuotedPrint, Pod::Checker,
924 podlators, Pod::Simple, Socket, and Test::Harness.
925 The causes of the failures range from the self-test itself is
927 flawed, and the module actually works fine, up to the module
928 doesn't work at all on EBCDIC platforms.
929
931 • "savepvn"'s len parameter is now a "Size_t" instead of an "I32"
932 since we can handle longer strings than 31 bits.
933 • The lexer ("Perl_yylex()" in toke.c) was previously a single
935 4100-line function, relying heavily on "goto" and a lot of widely-
936 scoped local variables to do its work. It has now been pulled apart
937 into a few dozen smaller static functions; the largest remaining
938 chunk ("yyl_word_or_keyword()") is a little over 900 lines, and
939 consists of a single "switch" statement, all of whose "case" groups
940 are independent. This should be much easier to understand and
941 maintain.
942 • The OS-level signal handlers and type (Sighandler_t) used by the
944 perl core were declared as having three parameters, but the OS was
945 always told to call them with one argument. This has been fixed by
946 declaring them to have one parameter. See the merge commit
947 "v5.31.5-346-g116e19abbf" for full details.
948 • The code that handles "tr///" has been extensively revised, fixing
950 various bugs, especially when the source and/or replacement strings
951 contain characters whose code points are above 255. Some of the
952 bugs were undocumented, one being that under some circumstances
953 (but not all) with "/s", the squeezing was done based on the
954 source, rather than the replacement. A documented bug that got
955 fixed was [perl #125493
956 <https://rt.perl.org/Ticket/Display.html?id=125493>].
957 • A new macro for XS writers dealing with UTF-8-encoded Unicode
959 strings has been created ""UTF8_CHK_SKIP"" in perlapi that is safer
960 in the face of malformed UTF-8 input than ""UTF8_SKIP"" in perlapi
961 (but not as safe as ""UTF8_SAFE_SKIP"" in perlapi). It won't read
962 past a NUL character. It has been backported in Devel::PPPort 3.55
963 and later.
964 • Added the "PL_curstackinfo->si_cxsubix" field. This records the
966 stack index of the most recently pushed sub/format/eval context. It
967 is set and restored automatically by "cx_pushsub()", "cx_popsub()"
968 etc., but would need to be manually managed if you do any unusual
969 manipulation of the context stack.
970 • Various macros dealing with character type classification and
972 changing case where the input is encoded in UTF-8 now require an
973 extra parameter to prevent potential reads beyond the end of the
974 buffer. Use of these has generated a deprecation warning since Perl
975 5.26. Details are in "In XS code, use of various macros dealing
976 with UTF-8." in perldeprecation
977 • A new parser function parse_subsignature() allows a keyword plugin
979 to parse a subroutine signature while "use feature 'signatures'" is
980 in effect. This allows custom keywords to implement semantics
981 similar to regular "sub" declarations that include signatures.
982 [perl #132474 <https://rt.perl.org/Ticket/Display.html?id=132474>]
983 • Since on some platforms we need to hold a mutex when temporarily
985 switching locales, new macros ("STORE_LC_NUMERIC_SET_TO_NEEDED_IN",
986 "WITH_LC_NUMERIC_SET_TO_NEEDED" and
987 "WITH_LC_NUMERIC_SET_TO_NEEDED_IN") have been added to make it
988 easier to do this safely and efficiently as part of [perl #134172
989 <https://rt.perl.org/Ticket/Display.html?id=134172>].
990 • The memory bookkeeping overhead for allocating an OP structure has
992 been reduced by 8 bytes per OP on 64-bit systems.
993 • eval_pv() no longer stringifies the exception when "croak_on_error"
995 is true. [perl #134175
996 <https://rt.perl.org/Ticket/Display.html?id=134175>]
997 • The PERL_DESTRUCT_LEVEL environment variable was formerly only
999 honoured on perl binaries built with DEBUGGING support. It is now
1000 checked on all perl builds. Its normal use is to force perl to
1001 individually free every block of memory which it has allocated
1002 before exiting, which is useful when using automated leak detection
1003 tools such as valgrind.
1004 • The API eval_sv() now accepts a "G_RETHROW" flag. If this flag is
1006 set and an exception is thrown while compiling or executing the
1007 supplied code, it will be rethrown, and eval_sv() will not return.
1008 [perl #134177 <https://rt.perl.org/Ticket/Display.html?id=134177>]
1009 • As part of the fix for [perl #2754
1011 <https://rt.perl.org/Ticket/Display.html?id=2754>] perl_parse() now
1012 returns non-zero if exit(0) is called in a "BEGIN", "UNITCHECK" or
1013 "CHECK" block.
1014 • Most functions which recursively walked an op tree during
1016 compilation have been made non-recursive. This avoids SEGVs from
1017 stack overflow when the op tree is deeply nested, such as "$n == 1
1018 ? "one" : $n == 2 ? "two" : ...." (especially in code which is
1019 auto-generated).
1020 This is particularly noticeable where the code is compiled within a
1022 separate thread, as threads tend to have small stacks by default.
1023
1025 • Previously "require" in perlfunc would only treat the special
1026 built-in SV &PL_sv_undef as a value in %INC as if a previous
1027 "require" has failed, treating other undefined SVs as if the
1028 previous "require" has succeeded. This could cause unexpected
1029 success from "require" e.g., on "local %INC = %INC;". This has been
1030 fixed. [GH #17428 <https://github.com/Perl/perl5/issues/17428>]
1031 • "(?{...})" eval groups in regular expressions no longer
1033 unintentionally trigger "EVAL without pos change exceeded limit in
1034 regex" [GH #17490 <https://github.com/Perl/perl5/issues/17490>].
1035 • "(?[...])" extended bracketed character classes do not wrongly
1037 raise an error on some cases where a previously-compiled such class
1038 is interpolated into another. The heuristics previously used have
1039 been replaced by a reliable method, and hence the diagnostics
1040 generated have changed. See "Diagnostics".
1041 • The debug display (say by specifying "-Dr" or "use re" (with
1043 appropriate options) of compiled Unicode property wildcard
1044 subpatterns no longer has extraneous output.
1045 • Fix an assertion failure in the regular expression engine. [GH
1047 #17372 <https://github.com/Perl/perl5/issues/17372>]
1048 • Fix coredump in pp_hot.c after "B::UNOP_AUX::aux_list()". [GH
1050 #17301 <https://github.com/Perl/perl5/issues/17301>]
1051 • Loading IO is now threadsafe. [GH #14816
1053 <https://github.com/Perl/perl5/issues/14816>]
1054 • "\p{user-defined}" overrides official Unicode [GH #17025
1056 <https://github.com/Perl/perl5/issues/17025>]
1057 Prior to this patch, the override was only sometimes in effect.
1059 • Properly handle filled "/il" regnodes and multi-char folds
1061 • Compilation error during make minitest [GH #17293
1063 <https://github.com/Perl/perl5/issues/17293>]
1064 • Move the implementation of "%-", "%+" into core.
1066 • Read beyond buffer in "grok_inf_nan" [GH #17370
1068 <https://github.com/Perl/perl5/issues/17370>]
1069 • Workaround glibc bug with "LC_MESSAGES" [GH #17081
1071 <https://github.com/Perl/perl5/issues/17081>]
1072 • "printf()" or "sprintf()" with the %n format could cause a panic on
1074 debugging builds, or report an incorrectly cached length value when
1075 producing "SVfUTF8" flagged strings. [GH #17221
1076 <https://github.com/Perl/perl5/issues/17221>]
1077 • The tokenizer has been extensively refactored. [GH #17241
1079 <https://github.com/Perl/perl5/issues/17241>] [GH #17189
1080 <https://github.com/Perl/perl5/issues/17189>]
1081 • "use strict "subs"" is now enforced for bareword constants
1083 optimized into a "multiconcat" operator. [GH #17254
1084 <https://github.com/Perl/perl5/issues/17254>]
1085 • A memory leak in regular expression patterns has been fixed. [GH
1087 #17218 <https://github.com/Perl/perl5/issues/17218>]
1088 • Perl no longer treats strings starting with "0x" or "0b" as hex or
1090 binary numbers respectively when converting a string to a number.
1091 This reverts a change in behaviour inadvertently introduced in perl
1092 5.30.0 intended to improve precision when converting a string to a
1093 floating point number. [perl #134230
1094 <https://rt.perl.org/Ticket/Display.html?id=134230>]
1095 • Matching a non-"SVf_UTF8" string against a regular expression
1097 containing unicode literals could leak a SV on each match attempt.
1098 [perl #134390 <https://rt.perl.org/Ticket/Display.html?id=134390>]
1099 • Overloads for octal and binary floating point literals were always
1101 passed a string with a "0x" prefix instead of the appropriate 0 or
1102 "0b" prefix. [perl #125557
1103 <https://rt.perl.org/Ticket/Display.html?id=125557>]
1104 • "$@ = 100; die;" now correctly propagates the 100 as an exception
1106 instead of ignoring it. [perl #134291
1107 <https://rt.perl.org/Ticket/Display.html?id=134291>]
1108 • "0 0x@" no longer asserts in S_no_op(). [perl #134310
1110 <https://rt.perl.org/Ticket/Display.html?id=134310>]
1111 • Exceptions thrown while $@ is read-only could result in infinite
1113 recursion as perl tried to update $@, which throws another
1114 exception, resulting in a stack overflow. Perl now replaces $@ with
1115 a copy if it's not a simple writable SV. [perl #134266
1116 <https://rt.perl.org/Ticket/Display.html?id=134266>]
1117 • Setting $) now properly sets supplementary group ids if you have
1119 the necessary privileges. [perl #134169
1120 <https://rt.perl.org/Ticket/Display.html?id=134169>]
1121 • close() on a pipe now preemptively clears the PerlIO object from
1123 the IO SV. This prevents a second attempt to close the already
1124 closed PerlIO object if a signal handler calls die() or exit()
1125 while close() is waiting for the child process to complete. [perl
1126 #122112 <https://rt.perl.org/Ticket/Display.html?id=122112>]
1127 • "sprintf("%.*a", -10000, $x)" would cause a buffer overflow due to
1129 mishandling of the negative precision value. [perl #134008
1130 <https://rt.perl.org/Ticket/Display.html?id=134008>]
1131 • scalar() on a reference could cause an erroneous assertion failure
1133 during compilation. [perl #134045
1134 <https://rt.perl.org/Ticket/Display.html?id=134045>]
1135 • "%{^CAPTURE_ALL}" is now an alias to "%-" as documented, rather
1137 than incorrectly an alias for "%+". [perl #131867
1138 <https://rt.perl.org/Ticket/Display.html?id=131867>]
1139 • "%{^CAPTURE}" didn't work if "@{^CAPTURE}" was mentioned first.
1141 Similarly for "%{^CAPTURE_ALL}" and "@{^CAPTURE_ALL}", though
1142 "@{^CAPTURE_ALL}" currently isn't used. [perl #134193
1143 <https://rt.perl.org/Ticket/Display.html?id=134193>]
1144 • Extraordinarily large (over 2GB) floating point format widths could
1146 cause an integer overflow in the underlying call to snprintf(),
1147 resulting in an assertion. Formatted floating point widths are now
1148 limited to the range of int, the return value of snprintf(). [perl
1149 #133913 <https://rt.perl.org/Ticket/Display.html?id=133913>]
1150 • Parsing the following constructs within a sub-parse (such as with
1152 "${code here}" or "s/.../code here/e") has changed to match how
1153 they're parsed normally:
1154 • "print $fh ..." no longer produces a syntax error.
1156 • Code like "s/.../ ${time} /e" now properly produces an
1158 "Ambiguous use of ${time} resolved to $time at ..." warning
1159 when warnings are enabled.
1160 • "@x {"a"}" (with the space) in a sub-parse now properly
1162 produces a "better written as" warning when warnings are
1163 enabled.
1164 • Attributes can now be used in a sub-parse. [perl #133850
1166 <https://rt.perl.org/Ticket/Display.html?id=133850>]
1167 • Incomplete hex and binary literals like "0x" and "0b" are now
1169 treated as if the "x" or "b" is part of the next token. [perl
1170 #134125 <https://rt.perl.org/Ticket/Display.html?id=134125>]
1171 • A spurious ")" in a subparse, such as in "s/.../code here/e" or
1173 "...${code here}", no longer confuses the parser.
1174 Previously a subparse was bracketed with generated "(" and ")"
1176 tokens, so a spurious ")" would close the construct without doing
1177 the normal subparse clean up, confusing the parser and possible
1178 causing an assertion failure.
1179 Such constructs are now surrounded by artificial tokens that can't
1181 be included in the source. [perl #130585
1182 <https://rt.perl.org/Ticket/Display.html?id=130585>]
1183 • Reference assignment of a sub, such as "\&foo = \&bar;", silently
1185 did nothing in the "main::" package. [perl #134072
1186 <https://rt.perl.org/Ticket/Display.html?id=134072>]
1187 • sv_gets() now recovers better if the target SV is modified by a
1189 signal handler. [perl #134035
1190 <https://rt.perl.org/Ticket/Display.html?id=134035>]
1191 • "readline @foo" now evaluates @foo in scalar context. Previously it
1193 would be evaluated in list context, and since readline() pops only
1194 one argument from the stack, the stack could underflow, or be left
1195 with unexpected values on the stack. [perl #133989
1196 <https://rt.perl.org/Ticket/Display.html?id=133989>]
1197 • Parsing incomplete hex or binary literals was changed in 5.31.1 to
1199 treat such a literal as just the 0, leaving the following "x" or
1200 "b" to be parsed as part of the next token. This could lead to some
1201 silent changes in behaviour, so now incomplete hex or binary
1202 literals produce a fatal error. [perl #134125
1203 <https://rt.perl.org/Ticket/Display.html?id=134125>]
1204 • eval_pv()'s croak_on_error flag will now throw even if the
1206 exception is a false overloaded value. [perl #134177
1207 <https://rt.perl.org/Ticket/Display.html?id=134177>]
1208 • "INIT" blocks and the program itself are no longer run if exit(0)
1210 is called within a "BEGIN", "UNITCHECK" or "CHECK" block. [perl
1211 #2754 <https://rt.perl.org/Ticket/Display.html?id=2754>]
1212 • "open my $fh, ">>+", undef" now opens the temporary file in append
1214 mode: writes will seek to the end of file before writing. [perl
1215 #134221 <https://rt.perl.org/Ticket/Display.html?id=134221>]
1216 • Fixed a SEGV when searching for the source of an uninitialized
1218 value warning on an op whose subtree includes an OP_MULTIDEREF.
1219 [perl #134275 <https://rt.perl.org/Ticket/Display.html?id=134275>]
1220
1222 Jeff Goff (JGOFF or DrForr), an integral part of the Perl and Raku
1223 communities and a dear friend to all of us, has passed away on March
1224 13th, 2020. DrForr was a prominent member of the communities, attending
1225 and speaking at countless events, contributing to numerous projects,
1226 and assisting and helping in any way he could.
1227 His passing leaves a hole in our hearts and in our communities and he
1229 will be sorely missed.
1230
1232 Perl 5.32.0 represents approximately 13 months of development since
1233 Perl 5.30.0 and contains approximately 220,000 lines of changes across
1234 1,800 files from 89 authors.
1235 Excluding auto-generated files, documentation and release tools, there
1237 were approximately 140,000 lines of changes to 880 .pm, .t, .c and .h
1238 files.
1239 Perl continues to flourish into its fourth decade thanks to a vibrant
1241 community of users and developers. The following people are known to
1242 have contributed the improvements that became Perl 5.32.0:
1243 Aaron Crane, Alberto Simo~es, Alexandr Savca, Andreas Koenig, Andrew
1245 Fresh, Andy Dougherty, Ask Bjorn Hansen, Atsushi Sugawara, Bernhard M.
1246 Wiedemann, brian d foy, Bryan Stenson, Chad Granum, Chase Whitener,
1247 Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsaaker, Dan
1248 Book, Daniel Dragan, Dan Kogai, Dave Cross, Dave Rolsky, David
1249 Cantrell, David Mitchell, Dominic Hargreaves, E. Choroba, Felipe
1250 Gasper, Florian Weimer, Graham Knop, Haakon Haegland, Hauke D, H.Merijn
1251 Brand, Hugo van der Sanden, Ichinose Shogo, James E Keenan, Jason
1252 McIntosh, Jerome Duval, Johan Vromans, John Lightsey, John Paul Adrian
1253 Glaubitz, Kang-min Liu, Karen Etheridge, Karl Williamson, Leon
1254 Timmermans, Manuel Mausz, Marc Green, Matthew Horsfall, Matt Turner,
1255 Max Maischein, Michael Haardt, Nicholas Clark, Nicolas R., Niko Tyni,
1256 Pali, Paul Evans, Paul Johnson, Paul Marquess, Peter Eisentraut, Peter
1257 John Acklam, Peter Oliver, Petr PisaX, Renee Baecker, Ricardo Signes,
1258 Richard Leach, Russ Allbery, Samuel Smith, Santtu Ojanperae, Sawyer X,
1259 Sergey Aleynikov, Sergiy Borodych, Shirakata Kentaro, Shlomi Fish,
1260 Sisyphus, Slaven Rezic, Smylers, Stefan Seifert, Steve Hay, Steve
1261 Peters, Svyatoslav, Thibault Duponchelle, Todd Rinaldo, Tomasz
1262 Konojacki, Tom Hukins, Tony Cook, Unicode Consortium, VanL, Vickenty
1263 Fesunov, Vitali Peil, Yves Orton, Zefram.
1264 The list above is almost certainly incomplete as it is automatically
1266 generated from version control history. In particular, it does not
1267 include the names of the (very much appreciated) contributors who
1268 reported issues to the Perl bug tracker.
1269 Many of the changes included in this version originated in the CPAN
1271 modules included in Perl's core. We're grateful to the entire CPAN
1272 community for helping Perl to flourish.
1273 For a more complete list of all of Perl's historical contributors,
1275 please see the AUTHORS file in the Perl source distribution.
1276
1278 If you find what you think is a bug, you might check the perl bug
1279 database at <https://github.com/Perl/perl5/issues>. There may also be
1280 information at <http://www.perl.org/>, the Perl Home Page.
1281 If you believe you have an unreported bug, please open an issue at
1283 <https://github.com/Perl/perl5/issues>. Be sure to trim your bug down
1284 to a tiny but sufficient test case.
1285 If the bug you are reporting has security implications which make it
1287 inappropriate to send to a public issue tracker, then see "SECURITY
1288 VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to
1289 report the issue.
1290
1292 If you wish to thank the Perl 5 Porters for the work we had done in
1293 Perl 5, you can do so by running the "perlthanks" program:
1294 perlthanks
1296 This will send an email to the Perl 5 Porters list with your show of
1298 thanks.
1299
1301 The Changes file for an explanation of how to view exhaustive details
1302 on what changed.
1303 The INSTALL file for how to build Perl.
1305 The README file for general stuff.
1307 The Artistic and Copying files for copyright information.
1309perl v5.32.1 2021-05-31 PERL5320DELTA(1)