PERL5320DELTA(1) Perl Programmers Reference Guide PERL5320DELTA(1) #
PERL5320DELTA(1) Perl Programmers Reference Guide PERL5320DELTA(1)
NNAAMMEE #
perl5320delta - what is new for perl v5.32.0
DDEESSCCRRIIPPTTIIOONN #
This document describes differences between the 5.30.0 release and the
5.32.0 release.
If you are upgrading from an earlier release such as 5.28.0, first read
perl5300delta, which describes differences between 5.28.0 and 5.30.0.
CCoorree EEnnhhaanncceemmeennttss TThhee iissaa OOppeerraattoorr A new experimental infix operator called “isa” tests whether a given object is an instance of a given class or a class derived from it:
if( $obj isa Package::Name ) { ... }
For more detail see "Class Instance Operator" in perlop.
UUnniiccooddee 1133..00 iiss ssuuppppoorrtteedd See https://www.unicode.org/versions/Unicode13.0.0/ for details.
CChhaaiinneedd ccoommppaarriissoonnss ccaappaabbiilliittyy Some comparison operators, as their associativity, _c_h_a_i_n with some operators of the same precedence (but never with operators of different precedence).
if ( $x < $y <= $z ) {...}
behaves exactly like:
if ( $x < $y && $y <= $z ) {...}
(assuming that "$y" is as simple a scalar as it looks.)
You can read more about this in perlop under "Operator Precedence and
Associativity" in perlop.
NNeeww UUnniiccooddee pprrooppeerrttiieess “"IIddeennttiiffiieerr__SSttaattuuss"” aanndd “"IIddeennttiiffiieerr__TTyyppee"” ssuuppppoorrtteedd Unicode has revised its regular expression requirements: https://www.unicode.org/reports/tr18/tr18-21.html. As part of that they are wanting more properties to be exposed, ones that aren’t part of the strict UCD (Unicode character database). These two are used for examining inputs for security purposes. Details on their usage is at https://www.unicode.org/reports/tr39/.
IItt iiss nnooww ppoossssiibbllee ttoo wwrriittee “"qqrr//\\pp{{NNaammee==......}}//“”,, oorr “"qqrr!!\\pp{{nnaa==//((SSMMIILLIINNGG||GGRRIINNNNIINNGG)) FFAACCEE//}}!!“” The Unicode Name property is now accessible in regular expression patterns, as an alternative to “\N{…}”. A comparison of the two methods is given in “Comparison of \N{…} and \p{name=…}” in perlunicode.
The second example above shows that wildcard subpatterns are also usable
in this property. See "Wildcards in Property Values" in perlunicode.
IImmpprroovveemmeenntt ooff “"PPOOSSIIXX::::mmbblleenn(())“”,, “"mmbbttoowwcc"”,, aanndd “"wwccttoommbb"” The “POSIX::mblen()”, “mbtowc”, and “wctomb” functions now work on shift state locales and are thread-safe on C99 and above compilers when executed on a platform that has locale thread-safety; the length parameters are now optional.
These functions are always executed under the current C language locale.
(See perllocale.) Most locales are stateless, but a few, notably the
very rarely encountered ISO 2022, maintain a state between calls to these
functions. Previously the state was cleared on every call, but now the
state is not reset unless the appropriate parameter is "undef".
On threaded perls, the C99 functions mmbbrrlleenn(3), mmbbrrttoowwcc(3), and
wwccrrttoommbb(3), when available, are substituted for the plain functions.
This makes these functions thread-safe when executing on a locale thread-
safe platform.
The string length parameters in "mblen" and "mbtowc" are now optional;
useful only if you wish to restrict the length parsed in the source
string to less than the actual length.
AAllpphhaa aasssseerrttiioonnss aarree nnoo lloonnggeerr eexxppeerriimmeennttaall See “(*pla:pattern)” in perlre, “(*plb:pattern)” in perlre, “(*nla:pattern)” in perlre>, and “(*nlb:pattern)” in perlre. Use of these no longer generates a warning; existing code that disables the warning category “experimental::alpha_assertions” will continue to work without any changes needed. Enabling the category has no effect.
SSccrriipptt rruunnss aarree nnoo lloonnggeerr eexxppeerriimmeennttaall See “Script Runs” in perlre. Use of these no longer generates a warning; existing code that disables the warning category “experimental::script_run” will continue to work without any changes needed. Enabling the category has no effect.
FFeeaattuurree cchheecckkss aarree nnooww ffaasstteerr Previously feature checks in the parser required a hash lookup when features were set outside of a feature bundle, this has been optimized to a bit mask check. [GH #17229 https://github.com/Perl/perl5/issues/17229]
PPeerrll iiss nnooww ddeevveellooppeedd oonn GGiittHHuubb Perl is now developed on GitHub. You can find us at https://github.com/Perl/perl5.
Non-security bugs should now be reported via GitHub. Security issues
should continue to be reported as documented in perlsec.
CCoommppiilleedd ppaatttteerrnnss ccaann nnooww bbee dduummppeedd bbeeffoorree ooppttiimmiizzaattiioonn This is primarily useful for tracking down bugs in the regular expression compiler. This dump happens on “-DDEBUGGING” perls, if you specify “-Drv” on the command line; or on any perl if the pattern is compiled within the scope of “use re qw(Debug DUMP_PRE_OPTIMIZE)” or “use re qw(Debug COMPILE EXTRA)”. (All but the second case display other information as well.)
SSeeccuurriittyy [[CCVVEE--22002200--1100554433]] BBuuffffeerr oovveerrffllooww ccaauusseedd bbyy aa ccrraafftteedd rreegguullaarr eexxpprreessssiioonn A signed “size_t” integer overflow in the storage space calculations for nested regular expression quantifiers could cause a heap buffer overflow in Perl’s regular expression compiler that overwrites memory allocated after the regular expression storage space with attacker supplied data.
The target system needs a sufficient amount of memory to allocate partial
expansions of the nested quantifiers prior to the overflow occurring.
This requirement is unlikely to be met on 64-bit systems.
Discovered by: ManhND of The Tarantula Team, VinCSS (a member of
Vingroup).
[[CCVVEE--22002200--1100887788]] IInntteeggeerr oovveerrffllooww vviiaa mmaallffoorrmmeedd bbyytteeccooddee pprroodduucceedd bbyy aa ccrraafftteedd rreegguullaarr eexxpprreessssiioonn Integer overflows in the calculation of offsets between instructions for the regular expression engine could cause corruption of the intermediate language state of a compiled regular expression. An attacker could abuse this behaviour to insert instructions into the compiled form of a Perl regular expression.
Discovered by: Hugo van der Sanden and Slaven Rezic.
[[CCVVEE--22002200--1122772233]] BBuuffffeerr oovveerrffllooww ccaauusseedd bbyy aa ccrraafftteedd rreegguullaarr eexxpprreessssiioonn Recursive calls to “S_study_chunk()” by Perl’s regular expression compiler to optimize the intermediate language representation of a regular expression could cause corruption of the intermediate language state of a compiled regular expression.
Discovered by: Sergey Aleynikov.
AAddddiittiioonnaall NNoottee An application written in Perl would only be vulnerable to any of the above flaws if it evaluates regular expressions supplied by the attacker. Evaluating regular expressions in this fashion is known to be dangerous since the regular expression engine does not protect against denial of service attacks in this usage scenario.
IInnccoommppaattiibbllee CChhaannggeess CCeerrttaaiinn ppaatttteerrnn mmaattcchhiinngg ffeeaattuurreess aarree nnooww pprroohhiibbiitteedd iinn ccoommppiilliinngg UUnniiccooddee pprrooppeerrttyy vvaalluuee wwiillddccaarrdd ssuubbppaatttteerrnnss These few features are either inappropriate or interfere with the algorithm used to accomplish this task. The complete list is in “Wildcards in Property Values” in perlunicode.
UUnnuusseedd ffuunnccttiioonnss “"PPOOSSIIXX::::mmbbssttoowwccss"” aanndd “"PPOOSSIIXX::::wwccssttoommbbss"” aarree rreemmoovveedd These functions could never have worked due to a defective interface specification. There is clearly no demand for them, given that no one has ever complained in the many years the functions were claimed to be available, hence so-called “support” for them is now dropped.
AA bbuugg ffiixx ffoorr “”((??[[......]]))“” mmaayy hhaavvee ccaauusseedd ssoommee ppaatttteerrnnss ttoo nnoo lloonnggeerr ccoommppiillee See “Selected Bug Fixes”. The heuristics previously used may have let some constructs compile (perhaps not with the programmer’s intended effect) that should have been errors. None are known, but it is possible that some erroneous constructs no longer compile.
“”\\pp{{_u_s_e_r_-_d_e_f_i_n_e_d}}“” pprrooppeerrttiieess nnooww aallwwaayyss oovveerrrriiddee ooffffiicciiaall UUnniiccooddee oonneess Previously, if and only if a user-defined property was declared prior to the compilation of the regular expression pattern that contains it, its definition was used instead of any official Unicode property with the same name. Now, it always overrides the official property. This change could break existing code that relied (likely unwittingly) on the previous behavior. Without this fix, if Unicode released a new version with a new property that happens to have the same name as the one you had long been using, your program would break when you upgraded to a perl that used that new Unicode version. See “User-Defined Character Properties” in perlunicode. [GH #17205 https://github.com/Perl/perl5/issues/17205]
MMooddiiffiiaabbllee vvaarriiaabblleess aarree nnoo lloonnggeerr ppeerrmmiitttteedd iinn ccoonnssttaannttss Code like:
my $var;
$sub = sub () { $var };
where $var is referenced elsewhere in some sort of modifiable context now
produces an exception when the sub is defined.
This error can be avoided by adding a return to the sub definition:
$sub = sub () { return $var };
This has been deprecated since Perl 5.22. [GH #17020]
<https://github.com/Perl/perl5/issues/17020>
UUssee ooff “"vveecc"” oonn ssttrriinnggss wwiitthh ccooddee ppooiinnttss aabboovvee 00xxFFFF iiss ffoorrbbiiddddeenn Such strings are represented internally in UTF-8, and “vec” is a bit- oriented operation that will likely give unexpected results on those strings. This was deprecated in perl 5.28.0.
UUssee ooff ccooddee ppooiinnttss oovveerr 00xxFFFF iinn ssttrriinngg bbiittwwiissee ooppeerraattoorrss Some uses of these were already illegal after a previous deprecation cycle. The remaining uses are now prohibited, having been deprecated in perl 5.28.0. See perldeprecation.
“"SSyyss::::HHoossttnnaammee::::hhoossttnnaammee(())“” ddooeess nnoott aacccceepptt aarrgguummeennttss This usage was deprecated in perl 5.28.0 and is now fatal.
PPllaaiinn “"00"” ssttrriinngg nnooww ttrreeaatteedd aass aa nnuummbbeerr ffoorr rraannggee ooppeerraattoorr Previously a range “0” .. “-1” would produce a range of numeric strings from “0” through “99”; this now produces an empty list, just as “0 .. -1” does. This also means that “0” .. “9” now produces a list of integers, where previously it would produce a list of strings.
This was due to a special case that treated strings starting with "0" as
strings so ranges like "00" .. "03" produced "00", "01", "02", "03", but
didn't specially handle the string "0". [GH #16770]
<https://github.com/Perl/perl5/issues/16770>
“”\\KK"” nnooww ddiissaalllloowweedd iinn llooookk--aahheeaadd aanndd llooookk--bbeehhiinndd aasssseerrttiioonnss This was disallowed because it causes unexpected behaviour, and no-one could define what the desired behaviour should be. [GH #14638] https://github.com/Perl/perl5/issues/14638
PPeerrffoorrmmaannccee EEnnhhaanncceemmeennttss • “my_strnlen” has been sped up for systems that don’t have their own “strnlen” implementation.
• "grok_bin_oct_hex" (and so, "grok_bin", "grok_oct", and "grok_hex")
have been sped up.
• "grok_number_flags" has been sped up.
• "sort" is now noticeably faster in cases such as "sort {$a <=> $b}"
or "sort {$b <=> $a}". [GH #17608
<https://github.com/Perl/perl5/pull/17608>]
MMoodduulleess aanndd PPrraaggmmaattaa UUppddaatteedd MMoodduulleess aanndd PPrraaggmmaattaa • Archive::Tar has been upgraded from version 2.32 to 2.36.
• autodie has been upgraded from version 2.29 to 2.32.
• B has been upgraded from version 1.76 to 1.80.
• B::Deparse has been upgraded from version 1.49 to 1.54.
• Benchmark has been upgraded from version 1.22 to 1.23.
• charnames has been upgraded from version 1.45 to 1.48.
• Class::Struct has been upgraded from version 0.65 to 0.66.
• Compress::Raw::Bzip2 has been upgraded from version 2.084 to 2.093.
• Compress::Raw::Zlib has been upgraded from version 2.084 to 2.093.
• CPAN has been upgraded from version 2.22 to 2.27.
• DB_File has been upgraded from version 1.843 to 1.853.
• Devel::PPPort has been upgraded from version 3.52 to 3.57.
The test files generated on Win32 are now identical to when they are
generated on POSIX-like systems.
• diagnostics has been upgraded from version 1.36 to 1.37.
• Digest::MD5 has been upgraded from version 2.55 to 2.55_01.
• Dumpvalue has been upgraded from version 1.18 to 1.21.
Previously, when dumping elements of an array and encountering an
undefined value, the string printed would have been "empty array".
This has been changed to what was apparently originally intended:
"empty slot".
• DynaLoader has been upgraded from version 1.45 to 1.47.
• Encode has been upgraded from version 3.01 to 3.06.
• encoding has been upgraded from version 2.22 to 3.00.
• English has been upgraded from version 1.10 to 1.11.
• Exporter has been upgraded from version 5.73 to 5.74.
• ExtUtils::CBuilder has been upgraded from version 0.280231 to
0.280234.
• ExtUtils::MakeMaker has been upgraded from version 7.34 to 7.44.
• feature has been upgraded from version 1.54 to 1.58.
A new "indirect" feature has been added, which is enabled by default
but allows turning off indirect object syntax.
• File::Find has been upgraded from version 1.36 to 1.37.
On Win32, the tests no longer require either a file in the drive root
directory, or a writable root directory.
• File::Glob has been upgraded from version 1.32 to 1.33.
• File::stat has been upgraded from version 1.08 to 1.09.
• Filter::Simple has been upgraded from version 0.95 to 0.96.
• Getopt::Long has been upgraded from version 2.5 to 2.51.
• Hash::Util has been upgraded from version 0.22 to 0.23.
The Synopsis has been updated as the example code stopped working
with newer perls. [GH #17399
<https://github.com/Perl/perl5/issues/17399>]
• I18N::Langinfo has been upgraded from version 0.18 to 0.19.
• I18N::LangTags has been upgraded from version 0.43 to 0.44.
Document the "IGNORE_WIN32_LOCALE" environment variable.
• IO has been upgraded from version 1.40 to 1.43.
IO::Socket no longer caches a zero protocol value, since this
indicates that the implementation will select a protocol. This means
that on platforms that don't implement "SO_PROTOCOL" for a given
socket type the protocol method may return "undef".
The supplied _T_O is now always honoured on calls to the "send()"
method. [GH #16891] <https://github.com/Perl/perl5/issues/16891>
• IO-Compress has been upgraded from version 2.084 to 2.093.
• IPC::Cmd has been upgraded from version 1.02 to 1.04.
• IPC::Open3 has been upgraded from version 1.20 to 1.21.
• JSON::PP has been upgraded from version 4.02 to 4.04.
• Math::BigInt has been upgraded from version 1.999816 to 1.999818.
• Math::BigInt::FastCalc has been upgraded from version 0.5008 to
0.5009.
• Module::CoreList has been upgraded from version 5.20190522 to
5.20200620.
• Module::Load::Conditional has been upgraded from version 0.68 to
0.70.
• Module::Metadata has been upgraded from version 1.000036 to 1.000037.
• mro has been upgraded from version 1.22 to 1.23.
• Net::Ping has been upgraded from version 2.71 to 2.72.
• Opcode has been upgraded from version 1.43 to 1.47.
• open has been upgraded from version 1.11 to 1.12.
• overload has been upgraded from version 1.30 to 1.31.
• parent has been upgraded from version 0.237 to 0.238.
• perlfaq has been upgraded from version 5.20190126 to 5.20200523.
• PerlIO has been upgraded from version 1.10 to 1.11.
• PerlIO::encoding has been upgraded from version 0.27 to 0.28.
• PerlIO::via has been upgraded from version 0.17 to 0.18.
• Pod::Html has been upgraded from version 1.24 to 1.25.
• Pod::Simple has been upgraded from version 3.35 to 3.40.
• podlators has been upgraded from version 4.11 to 4.14.
• POSIX has been upgraded from version 1.88 to 1.94.
• re has been upgraded from version 0.37 to 0.40.
• Safe has been upgraded from version 2.40 to 2.41.
• Scalar::Util has been upgraded from version 1.50 to 1.55.
• SelfLoader has been upgraded from version 1.25 to 1.26.
• Socket has been upgraded from version 2.027 to 2.029.
• Storable has been upgraded from version 3.15 to 3.21.
Use of "note()" from Test::More is now optional in tests. This works
around a circular dependency with Test::More when installing on very
old perls from CPAN.
Vstring magic strings over 2GB are now disallowed.
Regular expressions objects weren't properly counted for object id
purposes on retrieve. This would corrupt the resulting structure, or
cause a runtime error in some cases. [GH #17037]
<https://github.com/Perl/perl5/issues/17037>
• Sys::Hostname has been upgraded from version 1.22 to 1.23.
• Sys::Syslog has been upgraded from version 0.35 to 0.36.
• Term::ANSIColor has been upgraded from version 4.06 to 5.01.
• Test::Simple has been upgraded from version 1.302162 to 1.302175.
• Thread has been upgraded from version 3.04 to 3.05.
• Thread::Queue has been upgraded from version 3.13 to 3.14.
• threads has been upgraded from version 2.22 to 2.25.
• threads::shared has been upgraded from version 1.60 to 1.61.
• Tie::File has been upgraded from version 1.02 to 1.06.
• Tie::Hash::NamedCapture has been upgraded from version 0.10 to 0.13.
• Tie::Scalar has been upgraded from version 1.04 to 1.05.
• Tie::StdHandle has been upgraded from version 4.5 to 4.6.
• Time::HiRes has been upgraded from version 1.9760 to 1.9764.
Removed obsolete code such as support for pre-5.6 perl and classic
MacOS. [GH #17096] <https://github.com/Perl/perl5/issues/17096>
• Time::Piece has been upgraded from version 1.33 to 1.3401.
• Unicode::Normalize has been upgraded from version 1.26 to 1.27.
• Unicode::UCD has been upgraded from version 0.72 to 0.75.
• VMS::Stdio has been upgraded from version 2.44 to 2.45.
• warnings has been upgraded from version 1.44 to 1.47.
• Win32 has been upgraded from version 0.52 to 0.53.
• Win32API::File has been upgraded from version 0.1203 to 0.1203_01.
• XS::APItest has been upgraded from version 1.00 to 1.09.
RReemmoovveedd MMoodduulleess aanndd PPrraaggmmaattaa • Pod::Parser has been removed from the core distribution. It still is available for download from CPAN. This resolves [#13194 https://github.com/Perl/perl5/issues/13194].
DDooccuummeennttaattiioonn CChhaannggeess ttoo EExxiissttiinngg DDooccuummeennttaattiioonn We have attempted to update the documentation to reflect the changes listed in this document. If you find any we have missed, open an issue at https://github.com/Perl/perl5/issues.
Additionally, the following selected changes have been made:
_p_e_r_l_d_e_b_g_u_t_s
• Simplify a few regnode definitions
Update "BOUND" and "NBOUND" definitions.
• Add ANYOFHs regnode
This node is like "ANYOFHb", but is used when more than one leading
byte is the same in all the matched code points.
"ANYOFHb" is used to avoid having to convert from UTF-8 to code point
for something that won't match. It checks that the first byte in the
UTF-8 encoded target is the desired one, thus ruling out most of the
possible code points.
_p_e_r_l_a_p_i
• "sv_2pvbyte" updated to mention it will croak if the SV cannot be
downgraded.
• "sv_setpvn" updated to mention that the UTF-8 flag will not be
changed by this function, and a terminating NUL byte is guaranteed.
• Documentation for "PL_phase" has been added.
• The documentation for "grok_bin", "grok_oct", and "grok_hex" has been
updated and clarified.
_p_e_r_l_d_i_a_g
• Add documentation for experimental 'isa' operator
(S experimental::isa) This warning is emitted if you use the ("isa")
operator. This operator is currently experimental and its behaviour
may change in future releases of Perl.
_p_e_r_l_f_u_n_c
"caller"
Like "__FILE__" and "__LINE__", the filename and line number returned
here may be altered by the mechanism described at "Plain Old Comments
(Not!)" in perlsyn.
“FILE” #
It can be altered by the mechanism described at "Plain Old Comments
(Not!)" in perlsyn.
“LINE” #
It can be altered by the mechanism described at "Plain Old Comments
(Not!)" in perlsyn.
"return"
Now mentions that you cannot return from "do BLOCK".
"open"
The "open()" section had been renovated significantly.
_p_e_r_l_g_u_t_s
• No longer suggesting using perl's "malloc". Modern system "malloc" is
assumed to be much better than perl's implementation now.
• Documentation about _e_m_b_e_d_._f_n_c flags has been removed. _e_m_b_e_d_._f_n_c now
has sufficient comments within it. Anyone changing that file will see
those comments first, so entries here are now redundant.
• Updated documentation for "UTF8f"
• Added missing "=for apidoc" lines
_p_e_r_l_h_a_c_k_t_i_p_s
• The differences between Perl strings and C strings are now detailed.
_p_e_r_l_i_n_t_r_o
• The documentation for the repetition operator "x" have been
clarified. [GH #17335 <https://github.com/Perl/perl5/issues/17335>]
_p_e_r_l_i_p_c
• The documentation surrounding "open" and handle usage has been
modernized to prefer 3-arg open and lexical variables instead of
barewords.
• Various updates and fixes including making all examples strict-safe
and replacing "-w" with "use warnings".
_p_e_r_l_o_p
• 'isa' operator is experimental
This is an experimental feature and is available when enabled by "use
feature 'isa'". It emits a warning in the "experimental::isa"
category.
_p_e_r_l_p_o_d
• Details of the various stacks within the perl interpreter are now
explained here.
• Advice has been added regarding the usage of "Z<>".
_p_e_r_l_p_o_r_t
• Update "timegm" example to use the correct year format _1_9_7_0 instead
of _7_0. [GH #16431 <https://github.com/Perl/perl5/issues/16431>]
_p_e_r_l_r_e_r_e_f
• Fix some typos.
_p_e_r_l_v_a_r
• Now recommends stringifying $] and comparing it numerically.
_p_e_r_l_a_p_i_, _p_e_r_l_i_n_t_e_r_n
• Documentation has been added for several functions that were lacking
it before.
_p_e_r_l_x_s
• Suggest using "libffi" for simple library bindings via CPAN modules
like FFI::Platypus or FFI::Raw.
_P_O_S_I_X #
• "setlocale" warning about threaded builds updated to note it does not
apply on Perl 5.28.X and later.
• "Posix::SigSet->new(...)" updated to state it throws an error if any
of the supplied signals cannot be added to the set.
Additionally, the following selected changes have been made:
_U_p_d_a_t_i_n_g _o_f _l_i_n_k_s
• Links to the now defunct <https://search.cpan.org> site now point at
the equivalent <https://metacpan.org> URL. [GH #17393
<https://github.com/Perl/perl5/issues/17393>]
• The man page for ExtUtils::XSSymSet is now only installed on VMS,
which is the only platform the module is installed on. [GH #17424
<https://github.com/Perl/perl5/issues/17424>]
• URLs have been changed to "https://" and stale links have been
updated.
Where applicable, the URLs in the documentation have been moved from
using the "http://" protocol to "https://". This also affects the
location of the bug tracker at <https://rt.perl.org>.
• Some links to OS/2 libraries, Address Sanitizer and other system
tools had gone stale. These have been updated with working links.
• Some links to old email addresses on perl5-porters had gone stale.
These have been updated with working links.
DDiiaaggnnoossttiiccss The following additions or changes have been made to diagnostic output, including warnings and fatal error messages. For the complete list of diagnostic messages, see perldiag.
NNeeww DDiiaaggnnoossttiiccss _N_e_w _E_r_r_o_r_s
• Expecting interpolated extended charclass in regex; marked by <--
HERE in m/%s/
This is a replacement for several error messages listed under
"Changes to Existing Diagnostics".
• "No digits found for %s literal"
(F) No hexadecimal digits were found following "0x" or no binary
digits were found following "0b".
_N_e_w _W_a_r_n_i_n_g_s
• Code point 0x%X is not Unicode, and not portable
This is actually not a new message, but it is now output when the
warnings category "portable" is enabled.
When raised during regular expression pattern compilation, the
warning has extra text added at the end marking where precisely in
the pattern it occurred.
• Non-hex character '%c' terminates \x early. Resolved as "%s"
This replaces a warning that was much less specific, and which gave
false information. This new warning parallels the similar already-
existing one raised for "\o{}".
CChhaannggeess ttoo EExxiissttiinngg DDiiaaggnnoossttiiccss • Character following “\c” must be printable ASCII
...now has extra text added at the end, when raised during regular
expression pattern compilation, marking where precisely in the
pattern it occurred.
• Use "%s" instead of "%s"
...now has extra text added at the end, when raised during regular
expression pattern compilation, marking where precisely in the
pattern it occurred.
• Sequence "\c{" invalid
...now has extra text added at the end, when raised during regular
expression pattern compilation, marking where precisely in the
pattern it occurred.
• "\c%c" is more clearly written simply as "%s"
...now has extra text added at the end, when raised during regular
expression pattern compilation, marking where precisely in the
pattern it occurred.
• Non-octal character '%c' terminates \o early. Resolved as "%s"
...now includes the phrase "terminates \o early", and has extra text
added at the end, when raised during regular expression pattern
compilation, marking where precisely in the pattern it occurred. In
some instances the text of the resolution has been clarified.
• '%s' resolved to '\o{%s}%d'
As of Perl 5.32, this message is no longer generated. Instead, "Non-
octal character '%c' terminates \o early. Resolved as "%s"" in
perldiag is used instead.
• Use of code point 0x%s is not allowed; the permissible max is 0x%X
Some instances of this message previously output the hex digits "A",
"B", "C", "D", "E", and "F" in lower case. Now they are all
consistently upper case.
• The following three diagnostics have been removed, and replaced by
"Expecting interpolated extended charclass in regex; marked by <--
HERE in m/%s/" : "Expecting close paren for nested extended charclass
in regex; marked by <-- HERE in m/%s/", "Expecting close paren for
wrapper for nested extended charclass in regex; marked by <-- HERE in
m/%s/", and "Expecting '(?flags:(?[...' in regex; marked by <-- HERE
in m/%s/".
• The "Code point 0x%X is not Unicode, and not portable" warning
removed the line "Code points above 0xFFFF_FFFF require larger than a
32 bit word." as code points that large are no longer legal on 32-bit
platforms.
• Can't use global %s in %s
This error message has been slightly reformatted from the original
"Can't use global %s in "%s"", and in particular misleading error
messages like "Can't use global $_ in "my"" are now rendered as
"Can't use global $_ in subroutine signature".
• Constants from lexical variables potentially modified elsewhere are
no longer permitted
This error message replaces the former "Constants from lexical
variables potentially modified elsewhere are deprecated. This will
not be allowed in Perl 5.32" to reflect the fact that this previously
deprecated usage has now been transformed into an exception. The
message's classification has also been updated from D (deprecated) to
F (fatal).
See also "Incompatible Changes".
• "\N{} here is restricted to one character" is now emitted in the same
circumstances where previously "\N{} in inverted character class or
as a range end-point is restricted to one character" was.
This is due to new circumstances having been added in Perl 5.30 that
weren't covered by the earlier wording.
UUttiilliittyy CChhaannggeess ppeerrllbbuugg • The bug tracker homepage URL now points to GitHub.
ssttrreeaammzziipp • This is a new utility, included as part of an IO::Compress::Base upgrade.
streamzip creates a zip file from stdin. The program will read data
from stdin, compress it into a zip container and, by default, write a
streamed zip file to stdout.
CCoonnffiigguurraattiioonn aanndd CCoommppiillaattiioonn _C_o_n_f_i_g_u_r_e • For clang++, add “#include <stdlib.h>” to Configure’s probes for “futimes”, “strtoll”, “strtoul”, “strtoull”, “strtouq”, otherwise the probes would fail to compile.
• Use a compile and run test for "lchown" to satisfy clang++ which
should more reliably detect it.
• For C++ compilers, add "#include <stdio.h>" to Configure's probes for
"getpgrp" and "setpgrp" as they use printf and C++ compilers may fail
compilation instead of just warning.
• Check if the compiler can handle inline attribute.
• Check for character data alignment.
• _C_o_n_f_i_g_u_r_e now correctly handles gcc-10. Previously it was
interpreting it as gcc-1 and turned on "-fpcc-struct-return".
• Perl now no longer probes for "d_u32align", defaulting to "define" on
all platforms. This check was error-prone when it was done, which was
on 32-bit platforms only. [GH #16680]
<https://github.com/Perl/perl5/issues/16680>
• Documentation and hints for building perl on Z/OS (native EBCDIC)
have been updated. This is still a work in progress.
• A new probe for "malloc_usable_size" has been added.
• Improvements in _C_o_n_f_i_g_u_r_e to detection in C++ and clang++. Work
ongoing by Andy Dougherty. [GH #17033]
<https://github.com/Perl/perl5/issues/17033>
• _a_u_t_o_d_o_c_._p_l
This tool that regenerates perlintern and perlapi has been overhauled
significantly, restoring consistency in flags used in _e_m_b_e_d_._f_n_c and
Devel::PPPort and allowing removal of many redundant "=for apidoc"
entries in code.
• The "ECHO" macro is now defined. This is used in a "dtrace" rule that
was originally changed for FreeBSD, and the FreeBSD make apparently
predefines it. The Solaris make does not predefine "ECHO" which
broke this rule on Solaris. [GH #17057]
<https://github.com/Perl/perl5/issues/17057>
• Bison versions 3.1 through 3.4 are now supported.
TTeessttiinngg Tests were added and changed to reflect the other additions and changes in this release. Furthermore, these significant changes were made:
• _t_/_r_u_n_/_s_w_i_t_c_h_e_s_._t no longer uses (and re-uses) the _t_m_p_i_n_p_l_a_c_e_/
directory under _t_/. This may prevent spurious failures. [GH #17424
<https://github.com/Perl/perl5/issues/17424>]
• Various bugs in "POSIX::mbtowc" were fixed. Potential races with
other threads are now avoided, and previously the returned wide
character could well be garbage.
• Various bugs in "POSIX::wctomb" were fixed. Potential races with
other threads are now avoided, and previously it would segfault if
the string parameter was shared or hadn't been pre-allocated with a
string of sufficient length to hold the result.
• Certain test output of scalars containing control characters and
Unicode has been fixed on EBCDIC.
• _t_/_c_h_a_r_s_e_t___t_o_o_l_s_._p_l: Avoid some work on ASCII platforms.
• _t_/_r_e_/_r_e_g_e_x_p_._t: Speed up many regex tests on ASCII platform
• _t_/_r_e_/_p_a_t_._t: Skip tests that don't work on EBCDIC.
PPllaattffoorrmm SSuuppppoorrtt DDiissccoonnttiinnuueedd PPllaattffoorrmmss Windows CE Support for building perl on Windows CE has now been removed.
PPllaattffoorrmm--SSppeecciiffiicc NNootteess Linux “cc” will be used to populate “plibpth” if “cc” is “clang”. [GH #17043] https://github.com/Perl/perl5/issues/17043
NetBSD 8.0
Fix compilation of Perl on NetBSD 8.0 with g++. [GH #17381
<https://github.com/Perl/perl5/issues/17381>]
Windows
• The configuration for "ccflags" and "optimize" are now separate,
as with POSIX platforms. [GH #17156
<https://github.com/Perl/perl5/issues/17156>]
• Support for building perl with Visual C++ 6.0 has now been
removed.
• The locale tests could crash on Win32 due to a Windows bug, and
separately due to the CRT throwing an exception if the locale
name wasn't validly encoded in the current code page.
For the second we now decode the locale name ourselves, and
always decode it as UTF-8. [GH #16922]
<https://github.com/Perl/perl5/issues/16922>
• _t_/_o_p_/_m_a_g_i_c_._t could fail if environment variables starting with
"FOO" already existed.
• MYMALLOC (PERL_MALLOC) build has been fixed.
Solaris
• "Configure" will now find recent versions of the Oracle Developer
Studio compiler, which are found under "/opt/developerstudio*".
• "Configure" now uses the detected types for "gethostby*"
functions, allowing Perl to once again compile on certain
configurations of Solaris.
VMS #
• With the release of the patch kit C99 V2.0, VSI has provided
support for a number of previously-missing C99 features. On
systems with that patch kit installed, Perl's configuration
process will now detect the presence of the header "stdint.h" and
the following functions: "fpclassify", "isblank", "isless",
"llrint", "llrintl", "llround", "llroundl", "nearbyint", "round",
"scalbn", and "scalbnl".
• "-Duse64bitint" is now the default on VMS.
z/OS
Perl 5.32 has been tested on z/OS 2.4, with the following caveats:
• Only static builds (the default) build reliably
• When using locales, z/OS does not handle the "LC_MESSAGES"
category properly, so when compiling perl, you should add the
following to your _C_o_n_f_i_g_u_r_e options
./Configure <other options> -Accflags=-DNO_LOCALE_MESSAGES
• z/OS does not support locales with threads, so when compiling a
threaded perl, you should add the following to your _C_o_n_f_i_g_u_r_e
options
./Configure <other Configure options> -Accflags=-DNO_LOCALE
• Some CPAN modules that are shipped with perl fail at least one of
their self-tests. These are: Archive::Tar, Config::Perl::V,
CPAN::Meta, CPAN::Meta::YAML, Digest::MD5, Digest::SHA, Encode,
ExtUtils::MakeMaker, ExtUtils::Manifest, HTTP::Tiny,
IO::Compress, IPC::Cmd, JSON::PP, libnet, MIME::Base64,
Module::Metadata, PerlIO::via-QuotedPrint, Pod::Checker,
podlators, Pod::Simple, Socket, and Test::Harness.
The causes of the failures range from the self-test itself is
flawed, and the module actually works fine, up to the module
doesn't work at all on EBCDIC platforms.
IInntteerrnnaall CChhaannggeess • “savepvn”’s len parameter is now a “Size_t” instead of an “I32” since we can handle longer strings than 31 bits.
• The lexer ("Perl_yylex()" in _t_o_k_e_._c) was previously a single
4100-line function, relying heavily on "goto" and a lot of widely-
scoped local variables to do its work. It has now been pulled apart
into a few dozen smaller static functions; the largest remaining
chunk ("yyl_word_or_keyword()") is a little over 900 lines, and
consists of a single "switch" statement, all of whose "case" groups
are independent. This should be much easier to understand and
maintain.
• The OS-level signal handlers and type (Sighandler_t) used by the perl
core were declared as having three parameters, but the OS was always
told to call them with one argument. This has been fixed by declaring
them to have one parameter. See the merge commit
"v5.31.5-346-g116e19abbf" for full details.
• The code that handles "tr///" has been extensively revised, fixing
various bugs, especially when the source and/or replacement strings
contain characters whose code points are above 255. Some of the bugs
were undocumented, one being that under some circumstances (but not
all) with "/s", the squeezing was done based on the source, rather
than the replacement. A documented bug that got fixed was [GH #14777]
<https://github.com/Perl/perl5/issues/14777>.
• A new macro for XS writers dealing with UTF-8-encoded Unicode strings
has been created ""UTF8_CHK_SKIP"" in perlapi that is safer in the
face of malformed UTF-8 input than ""UTF8_SKIP"" in perlapi (but not
as safe as ""UTF8_SAFE_SKIP"" in perlapi). It won't read past a NUL
character. It has been backported in Devel::PPPort 3.55 and later.
• Added the "PL_curstackinfo->si_cxsubix" field. This records the stack
index of the most recently pushed sub/format/eval context. It is set
and restored automatically by "cx_pushsub()", "cx_popsub()" etc., but
would need to be manually managed if you do any unusual manipulation
of the context stack.
• Various macros dealing with character type classification and
changing case where the input is encoded in UTF-8 now require an
extra parameter to prevent potential reads beyond the end of the
buffer. Use of these has generated a deprecation warning since Perl
5.26. Details are in "In XS code, use of various macros dealing with
UTF-8." in perldeprecation
• A new parser function ppaarrssee__ssuubbssiiggnnaattuurree(()) allows a keyword plugin to
parse a subroutine signature while "use feature 'signatures'" is in
effect. This allows custom keywords to implement semantics similar to
regular "sub" declarations that include signatures. [GH #16261]
<https://github.com/Perl/perl5/issues/16261>
• Since on some platforms we need to hold a mutex when temporarily
switching locales, new macros ("STORE_LC_NUMERIC_SET_TO_NEEDED_IN",
"WITH_LC_NUMERIC_SET_TO_NEEDED" and
"WITH_LC_NUMERIC_SET_TO_NEEDED_IN") have been added to make it easier
to do this safely and efficiently as part of [GH #17034]
<https://github.com/Perl/perl5/issues/17034>.
• The memory bookkeeping overhead for allocating an OP structure has
been reduced by 8 bytes per OP on 64-bit systems.
• eevvaall__ppvv(()) no longer stringifies the exception when "[GH
#17035]|https://github.com/Perl/perl5/issues/17035"]
• The PERL_DESTRUCT_LEVEL environment variable was formerly only
honoured on perl binaries built with DEBUGGING support. It is now
checked on all perl builds. Its normal use is to force perl to
individually free every block of memory which it has allocated before
exiting, which is useful when using automated leak detection tools
such as valgrind.
• The API eevvaall__ssvv(()) now accepts a "G_RETHROW" flag. If this flag is set
and an exception is thrown while compiling or executing the supplied
code, it will be rethrown, and eevvaall__ssvv(()) will not return. [GH
#17036] <https://github.com/Perl/perl5/issues/17036>
• As part of the fix for [GH #1537]
<https://github.com/Perl/perl5/issues/1537> ppeerrll__ppaarrssee(()) now returns
non-zero if eexxiitt(0) is called in a "BEGIN", "UNITCHECK" or "CHECK"
block.
• Most functions which recursively walked an op tree during compilation
have been made non-recursive. This avoids SEGVs from stack overflow
when the op tree is deeply nested, such as "$n == 1 ? "one" : $n == 2
? "two" : ...." (especially in code which is auto-generated).
This is particularly noticeable where the code is compiled within a
separate thread, as threads tend to have small stacks by default.
SSeelleecctteedd BBuugg FFiixxeess • Previously “require” in perlfunc would only treat the special built- in SV &PL_sv_undef as a value in %INC as if a previous “require” has failed, treating other undefined SVs as if the previous “require” has succeeded. This could cause unexpected success from “require” e.g., on “local %INC = %INC;”. This has been fixed. [GH #17428 https://github.com/Perl/perl5/issues/17428]
• "(?{...})" eval groups in regular expressions no longer
unintentionally trigger "EVAL without pos change exceeded limit in
regex" [GH #17490 <https://github.com/Perl/perl5/issues/17490>].
• "(?[...])" extended bracketed character classes do not wrongly raise
an error on some cases where a previously-compiled such class is
interpolated into another. The heuristics previously used have been
replaced by a reliable method, and hence the diagnostics generated
have changed. See "Diagnostics".
• The debug display (say by specifying "-Dr" or "use re" (with
appropriate options) of compiled Unicode property wildcard
subpatterns no longer has extraneous output.
• Fix an assertion failure in the regular expression engine. [GH
#17372 <https://github.com/Perl/perl5/issues/17372>]
• Fix coredump in pp_hot.c after "B::UNOP_AUX::aux_list()". [GH #17301
<https://github.com/Perl/perl5/issues/17301>]
• Loading IO is now threadsafe. [GH #14816
<https://github.com/Perl/perl5/issues/14816>]
• "\p{user-defined}" overrides official Unicode [GH #17025
<https://github.com/Perl/perl5/issues/17025>]
Prior to this patch, the override was only sometimes in effect.
• Properly handle filled "/il" regnodes and multi-char folds
• Compilation error during make minitest [GH #17293
<https://github.com/Perl/perl5/issues/17293>]
• Move the implementation of "%-", "%+" into core.
• Read beyond buffer in "grok_inf_nan" [GH #17370
<https://github.com/Perl/perl5/issues/17370>]
• Workaround glibc bug with "LC_MESSAGES" [GH #17081
<https://github.com/Perl/perl5/issues/17081>]
• "printf()" or "sprintf()" with the %n format could cause a panic on
debugging builds, or report an incorrectly cached length value when
producing "SVfUTF8" flagged strings. [GH #17221
<https://github.com/Perl/perl5/issues/17221>]
• The tokenizer has been extensively refactored. [GH #17241
<https://github.com/Perl/perl5/issues/17241>] [GH #17189
<https://github.com/Perl/perl5/issues/17189>]
• "use strict "subs"" is now enforced for bareword constants optimized
into a "multiconcat" operator. [GH #17254
<https://github.com/Perl/perl5/issues/17254>]
• A memory leak in regular expression patterns has been fixed. [GH
#17218 <https://github.com/Perl/perl5/issues/17218>]
• Perl no longer treats strings starting with "0x" or "0b" as hex or
binary numbers respectively when converting a string to a number.
This reverts a change in behaviour inadvertently introduced in perl
5.30.0 intended to improve precision when converting a string to a
floating point number. [GH #17062]
<https://github.com/Perl/perl5/issues/17062>
• Matching a non-"SVf_UTF8" string against a regular expression
containing unicode literals could leak a SV on each match attempt.
[GH #17140] <https://github.com/Perl/perl5/issues/17140>
• Overloads for octal and binary floating point literals were always
passed a string with a "0x" prefix instead of the appropriate 0 or
"[GH #14791]|https://github.com/Perl/perl5/issues/14791"]
• "$@ = 100; die;" now correctly propagates the 100 as an exception
instead of ignoring it. [GH #17098]
<https://github.com/Perl/perl5/issues/17098>
• "[GH #17108]|https://github.com/Perl/perl5/issues/17108"]
• Exceptions thrown while $@ is read-only could result in infinite
recursion as perl tried to update $@, which throws another exception,
resulting in a stack overflow. Perl now replaces $@ with a copy if
it's not a simple writable SV. [GH #17083]
<https://github.com/Perl/perl5/issues/17083>
• Setting $) now properly sets supplementary group ids if you have the
necessary privileges. [GH #17031]
<https://github.com/Perl/perl5/issues/17031>
• cclloossee(()) on a pipe now preemptively clears the PerlIO object from the
IO SV. This prevents a second attempt to close the already closed
PerlIO object if a signal handler calls ddiiee(()) or eexxiitt(()) while cclloossee(())
is waiting for the child process to complete. [GH #13929]
<https://github.com/Perl/perl5/issues/13929>
• "sprintf("%.*a", -10000, $x)" would cause a buffer overflow due to
mishandling of the negative precision value. [GH #16942]
<https://github.com/Perl/perl5/issues/16942>
• ssccaallaarr(()) on a reference could cause an erroneous assertion failure
during compilation. [GH #16969]
<https://github.com/Perl/perl5/issues/16969>
• "%{^CAPTURE_ALL}" is now an alias to "%-" as documented, rather than
incorrectly an alias for "[GH
#16105]|https://github.com/Perl/perl5/issues/16105"]
• "%{^CAPTURE}" didn't work if "@{^CAPTURE}" was mentioned first.
Similarly for "%{^CAPTURE_ALL}" and "@{^CAPTURE_ALL}", though "[GH
#17045]|https://github.com/Perl/perl5/issues/17045"]
• Extraordinarily large (over 2GB) floating point format widths could
cause an integer overflow in the underlying call to ssnnpprriinnttff(()),
resulting in an assertion. Formatted floating point widths are now
limited to the range of int, the return value of ssnnpprriinnttff(()). [#16881
<https://github.com/Perl/perl5/issues/16881>]
• Parsing the following constructs within a sub-parse (such as with
"${code here}" or "s/.../code here/e") has changed to match how
they're parsed normally:
• "print $fh ..." no longer produces a syntax error.
• Code like "s/.../ ${time} /e" now properly produces an "Ambiguous
use of ${time} resolved to $time at ..." warning when warnings
are enabled.
• "@x {"a"}" (with the space) in a sub-parse now properly produces
a "better written as" warning when warnings are enabled.
• Attributes can now be used in a sub-parse. [GH #16847]
<https://github.com/Perl/perl5/issues/16847>
• Incomplete hex and binary literals like "0x" and "0b" are now treated
as if the "x" or "b" is part of the next token. [#17010
<https://github.com/Perl/perl5/issues/17010>]
• A spurious ")" in a subparse, such as in "s/.../code here/e" or
"...${code here}", no longer confuses the parser.
Previously a subparse was bracketed with generated "(" and ")"
tokens, so a spurious ")" would close the construct without doing the
normal subparse clean up, confusing the parser and possible causing
an assertion failure.
Such constructs are now surrounded by artificial tokens that can't be
included in the source. [GH #15814]
<https://github.com/Perl/perl5/issues/15814>
• Reference assignment of a sub, such as "\&foo = \&bar;", silently did
nothing in the "[GH
#16987]|https://github.com/Perl/perl5/issues/16987"]
• ssvv__ggeettss(()) now recovers better if the target SV is modified by a
signal handler. [GH #16960]
<https://github.com/Perl/perl5/issues/16960>
• "readline @foo" now evaluates @foo in scalar context. Previously it
would be evaluated in list context, and since rreeaaddlliinnee(()) pops only
one argument from the stack, the stack could underflow, or be left
with unexpected values on the stack. [GH #16929]
<https://github.com/Perl/perl5/issues/16929>
• Parsing incomplete hex or binary literals was changed in 5.31.1 to
treat such a literal as just the 0, leaving the following "x" or "b"
to be parsed as part of the next token. This could lead to some
silent changes in behaviour, so now incomplete hex or binary literals
produce a fatal error. [GH #17010]
<https://github.com/Perl/perl5/issues/17010>
• eevvaall__ppvv(())'s _c_r_o_a_k___o_n___e_r_r_o_r flag will now throw even if the exception
is a false overloaded value. [GH #17036]
<https://github.com/Perl/perl5/issues/17036>
• "INIT" blocks and the program itself are no longer run if eexxiitt(0) is
called within a "BEGIN", "UNITCHECK" or "CHECK" block. [GH #1537]
<https://github.com/Perl/perl5/issues/1537>
• "open my $fh, ">>+", undef" now opens the temporary file in append
mode: writes will seek to the end of file before writing. [GH
#17058] <https://github.com/Perl/perl5/issues/17058>
• Fixed a SEGV when searching for the source of an uninitialized value
warning on an op whose subtree includes an OP_MULTIDEREF. [GH #17088]
<https://github.com/Perl/perl5/issues/17088>
OObbiittuuaarryy Jeff Goff (JGOFF or DrForr), an integral part of the Perl and Raku communities and a dear friend to all of us, has passed away on March 13th, 2020. DrForr was a prominent member of the communities, attending and speaking at countless events, contributing to numerous projects, and assisting and helping in any way he could.
His passing leaves a hole in our hearts and in our communities and he
will be sorely missed.
AAcckknnoowwlleeddggeemmeennttss Perl 5.32.0 represents approximately 13 months of development since Perl 5.30.0 and contains approximately 220,000 lines of changes across 1,800 files from 89 authors.
Excluding auto-generated files, documentation and release tools, there
were approximately 140,000 lines of changes to 880 .pm, .t, .c and .h
files.
Perl continues to flourish into its fourth decade thanks to a vibrant
community of users and developers. The following people are known to have
contributed the improvements that became Perl 5.32.0:
Aaron Crane, Alberto Simões, Alexandr Savca, Andreas König, Andrew Fresh,
Andy Dougherty, Ask Bjørn Hansen, Atsushi Sugawara, Bernhard M.
Wiedemann, brian d foy, Bryan Stenson, Chad Granum, Chase Whitener, Chris
'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan Book,
Daniel Dragan, Dan Kogai, Dave Cross, Dave Rolsky, David Cantrell, David
Mitchell, Dominic Hargreaves, E. Choroba, Felipe Gasper, Florian Weimer,
Graham Knop, Håkon Hægland, Hauke D, H.Merijn Brand, Hugo van der Sanden,
Ichinose Shogo, James E Keenan, Jason McIntosh, Jerome Duval, Johan
Vromans, John Lightsey, John Paul Adrian Glaubitz, Kang-min Liu, Karen
Etheridge, Karl Williamson, Leon Timmermans, Manuel Mausz, Marc Green,
Matthew Horsfall, Matt Turner, Max Maischein, Michael Haardt, Nicholas
Clark, Nicolas R., Niko Tyni, Pali, Paul Evans, Paul Johnson, Paul
Marquess, Peter Eisentraut, Peter John Acklam, Peter Oliver, Petr Písař,
Renee Baecker, Ricardo Signes, Richard Leach, Russ Allbery, Samuel Smith,
Santtu Ojanperä, Sawyer X, Sergey Aleynikov, Sergiy Borodych, Shirakata
Kentaro, Shlomi Fish, Sisyphus, Slaven Rezic, Smylers, Stefan Seifert,
Steve Hay, Steve Peters, Svyatoslav, Thibault Duponchelle, Todd Rinaldo,
Tomasz Konojacki, Tom Hukins, Tony Cook, Unicode Consortium, VanL,
Vickenty Fesunov, Vitali Peil, Yves Orton, Zefram.
The list above is almost certainly incomplete as it is automatically
generated from version control history. In particular, it does not
include the names of the (very much appreciated) contributors who
reported issues to the Perl bug tracker.
Many of the changes included in this version originated in the CPAN
modules included in Perl's core. We're grateful to the entire CPAN
community for helping Perl to flourish.
For a more complete list of all of Perl's historical contributors, please
see the _A_U_T_H_O_R_S file in the Perl source distribution.
RReeppoorrttiinngg BBuuggss If you find what you think is a bug, you might check the perl bug database at https://github.com/Perl/perl5/issues. There may also be information at http://www.perl.org/, the Perl Home Page.
If you believe you have an unreported bug, please open an issue at
<https://github.com/Perl/perl5/issues>. Be sure to trim your bug down to
a tiny but sufficient test case.
If the bug you are reporting has security implications which make it
inappropriate to send to a public issue tracker, then see "SECURITY
VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to
report the issue.
GGiivvee TThhaannkkss If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, you can do so by running the “perlthanks” program:
perlthanks
This will send an email to the Perl 5 Porters list with your show of
thanks.
SSEEEE AALLSSOO #
The _C_h_a_n_g_e_s file for an explanation of how to view exhaustive details on
what changed.
The _I_N_S_T_A_L_L file for how to build Perl.
The _R_E_A_D_M_E file for general stuff.
The _A_r_t_i_s_t_i_c and _C_o_p_y_i_n_g files for copyright information.
perl v5.36.3 2023-02-15 PERL5320DELTA(1)