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+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
+.ie n \{\
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds C`
+. ds C'
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
+..
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{\
+. if \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. if !\nF==2 \{\
+. nr % 0
+. nr F 2
+. \}
+. \}
+.\}
+.rr rF
+.\" ========================================================================
+.\"
+.IX Title "PERL5243DELTA 1"
+.TH PERL5243DELTA 1 2024-01-25 "perl v5.38.2" "Perl Programmers Reference Guide"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+perl5243delta \- what is new for perl v5.24.3
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+This document describes differences between the 5.24.2 release and the 5.24.3
+release.
+.PP
+If you are upgrading from an earlier release such as 5.24.1, first read
+perl5242delta, which describes differences between 5.24.1 and 5.24.2.
+.SH Security
+.IX Header "Security"
+.SS "[CVE\-2017\-12837] Heap buffer overflow in regular expression compiler"
+.IX Subsection "[CVE-2017-12837] Heap buffer overflow in regular expression compiler"
+Compiling certain regular expression patterns with the case-insensitive
+modifier could cause a heap buffer overflow and crash perl. This has now been
+fixed.
+[GH #16021] <https://github.com/Perl/perl5/issues/16021>
+.SS "[CVE\-2017\-12883] Buffer over-read in regular expression parser"
+.IX Subsection "[CVE-2017-12883] Buffer over-read in regular expression parser"
+For certain types of syntax error in a regular expression pattern, the error
+message could either contain the contents of a random, possibly large, chunk of
+memory, or could crash perl. This has now been fixed.
+[GH #16025] <https://github.com/Perl/perl5/issues/16025>
+.ie n .SS "[CVE\-2017\-12814] $ENV{$key} stack buffer overflow on Windows"
+.el .SS "[CVE\-2017\-12814] \f(CW$ENV{$key}\fP stack buffer overflow on Windows"
+.IX Subsection "[CVE-2017-12814] $ENV{$key} stack buffer overflow on Windows"
+A possible stack buffer overflow in the \f(CW%ENV\fR code on Windows has been fixed
+by removing the buffer completely since it was superfluous anyway.
+[GH #16051] <https://github.com/Perl/perl5/issues/16051>
+.SH "Incompatible Changes"
+.IX Header "Incompatible Changes"
+There are no changes intentionally incompatible with 5.24.2. If any exist,
+they are bugs, and we request that you submit a report. See "Reporting
+Bugs" below.
+.SH "Modules and Pragmata"
+.IX Header "Modules and Pragmata"
+.SS "Updated Modules and Pragmata"
+.IX Subsection "Updated Modules and Pragmata"
+.IP \(bu 4
+Module::CoreList has been upgraded from version 5.20170715_24 to
+5.20170922_24.
+.IP \(bu 4
+POSIX has been upgraded from version 1.65 to 1.65_01.
+.IP \(bu 4
+Time::HiRes has been upgraded from version 1.9733 to 1.9741.
+.Sp
+[GH #15396] <https://github.com/Perl/perl5/issues/15396>
+[GH #15401] <https://github.com/Perl/perl5/issues/15401>
+[GH #15524] <https://github.com/Perl/perl5/issues/15524>
+[cpan #120032] <https://rt.cpan.org/Public/Bug/Display.html?id=120032>
+.SH "Configuration and Compilation"
+.IX Header "Configuration and Compilation"
+.IP \(bu 4
+When building with GCC 6 and link-time optimization (the \fB\-flto\fR option to
+\&\fBgcc\fR), \fIConfigure\fR was treating all probed symbols as present on the system,
+regardless of whether they actually exist. This has been fixed.
+[GH #15322] <https://github.com/Perl/perl5/issues/15322>
+.IP \(bu 4
+\&\fIConfigure\fR now aborts if both \f(CW\*(C`\-Duselongdouble\*(C'\fR and \f(CW\*(C`\-Dusequadmath\*(C'\fR are
+requested.
+[GH #14944] <https://github.com/Perl/perl5/issues/14944>
+.IP \(bu 4
+Fixed a bug in which \fIConfigure\fR could append \f(CW\*(C`\-quadmath\*(C'\fR to the archname
+even if it was already present.
+[GH #15423] <https://github.com/Perl/perl5/issues/15423>
+.IP \(bu 4
+Clang builds with \f(CW\*(C`\-DPERL_GLOBAL_STRUCT\*(C'\fR or \f(CW\*(C`\-DPERL_GLOBAL_STRUCT_PRIVATE\*(C'\fR
+have been fixed (by disabling Thread Safety Analysis for these configurations).
+.SH "Platform Support"
+.IX Header "Platform Support"
+.SS "Platform-Specific Notes"
+.IX Subsection "Platform-Specific Notes"
+.IP VMS 4
+.IX Item "VMS"
+.RS 4
+.PD 0
+.IP \(bu 4
+.PD
+\&\f(CW\*(C`configure.com\*(C'\fR now recognizes the VSI-branded C compiler.
+.RE
+.RS 4
+.RE
+.IP Windows 4
+.IX Item "Windows"
+.RS 4
+.PD 0
+.IP \(bu 4
+.PD
+Building XS modules with GCC 6 in a 64\-bit build of Perl failed due to
+incorrect mapping of \f(CW\*(C`strtoll\*(C'\fR and \f(CW\*(C`strtoull\*(C'\fR. This has now been fixed.
+[GH #16074] <https://github.com/Perl/perl5/issues/16074>
+[cpan #121683] <https://rt.cpan.org/Public/Bug/Display.html?id=121683>
+[cpan #122353] <https://rt.cpan.org/Public/Bug/Display.html?id=122353>
+.RE
+.RS 4
+.RE
+.SH "Selected Bug Fixes"
+.IX Header "Selected Bug Fixes"
+.IP \(bu 4
+\&\f(CW\*(C`/@0{0*\->@*/*0\*(C'\fR and similar contortions used to crash, but no longer
+do, but merely produce a syntax error.
+[GH #15333] <https://github.com/Perl/perl5/issues/15333>
+.IP \(bu 4
+\&\f(CW\*(C`do\*(C'\fR or \f(CW\*(C`require\*(C'\fR with an argument which is a reference or typeglob which,
+when stringified, contains a null character, started crashing in Perl 5.20, but
+has now been fixed.
+[GH #15337] <https://github.com/Perl/perl5/issues/15337>
+.IP \(bu 4
+Expressions containing an \f(CW\*(C`&&\*(C'\fR or \f(CW\*(C`||\*(C'\fR operator (or their synonyms \f(CW\*(C`and\*(C'\fR and
+\&\f(CW\*(C`or\*(C'\fR) were being compiled incorrectly in some cases. If the left-hand side
+consisted of either a negated bareword constant or a negated \f(CW\*(C`do {}\*(C'\fR block
+containing a constant expression, and the right-hand side consisted of a
+negated non-foldable expression, one of the negations was effectively ignored.
+The same was true of \f(CW\*(C`if\*(C'\fR and \f(CW\*(C`unless\*(C'\fR statement modifiers, though with the
+left-hand and right-hand sides swapped. This long-standing bug has now been
+fixed.
+[GH #15285] <https://github.com/Perl/perl5/issues/15285>
+.IP \(bu 4
+\&\f(CW\*(C`reset\*(C'\fR with an argument no longer crashes when encountering stash entries
+other than globs.
+[GH #15314] <https://github.com/Perl/perl5/issues/15314>
+.IP \(bu 4
+Assignment of hashes to, and deletion of, typeglobs named \f(CW*::::::\fR no longer
+causes crashes.
+[GH #15307] <https://github.com/Perl/perl5/issues/15307>
+.IP \(bu 4
+Assignment variants of any bitwise ops under the \f(CW\*(C`bitwise\*(C'\fR feature would crash
+if the left-hand side was an array or hash.
+[GH #15346] <https://github.com/Perl/perl5/issues/15346>
+.IP \(bu 4
+\&\f(CW\*(C`socket\*(C'\fR now leaves the error code returned by the system in \f(CW$!\fR on failure.
+[GH #15383] <https://github.com/Perl/perl5/issues/15383>
+.IP \(bu 4
+Parsing bad POSIX charclasses no longer leaks memory.
+[GH #15382] <https://github.com/Perl/perl5/issues/15382>
+.IP \(bu 4
+Since Perl 5.20, line numbers have been off by one when perl is invoked with
+the \fB\-x\fR switch. This has been fixed.
+[GH #15413] <https://github.com/Perl/perl5/issues/15413>
+.IP \(bu 4
+Some obscure cases of subroutines and file handles being freed at the same time
+could result in crashes, but have been fixed. The crash was introduced in Perl
+5.22.
+[GH #15435] <https://github.com/Perl/perl5/issues/15435>
+.IP \(bu 4
+Some regular expression parsing glitches could lead to assertion failures with
+regular expressions such as \f(CW\*(C`/(?<=/\*(C'\fR and \f(CW\*(C`/(?<!/\*(C'\fR. This has now been
+fixed.
+[GH #15332] <https://github.com/Perl/perl5/issues/15332>
+.IP \(bu 4
+\&\f(CW\*(C`gethostent\*(C'\fR and similar functions now perform a null check internally, to
+avoid crashing with the torsocks library. This was a regression from Perl
+5.22.
+[GH #15478] <https://github.com/Perl/perl5/issues/15478>
+.IP \(bu 4
+Mentioning the same constant twice in a row (which is a syntax error) no longer
+fails an assertion under debugging builds. This was a regression from Perl
+5.20.
+[GH #15017] <https://github.com/Perl/perl5/issues/15017>
+.IP \(bu 4
+In Perl 5.24 \f(CW\*(C`fchown\*(C'\fR was changed not to accept negative one as an argument
+because in some platforms that is an error. However, in some other platforms
+that is an acceptable argument. This change has been reverted.
+[GH #15523] <https://github.com/Perl/perl5/issues/15523>.
+.IP \(bu 4
+\&\f(CW\*(C`@{x\*(C'\fR followed by a newline where \f(CW"x"\fR represents a control or non-ASCII
+character no longer produces a garbled syntax error message or a crash.
+[GH #15518] <https://github.com/Perl/perl5/issues/15518>
+.IP \(bu 4
+A regression in Perl 5.24 with \f(CW\*(C`tr/\eN{U+...}/foo/\*(C'\fR when the code point was
+between 128 and 255 has been fixed.
+[GH #15475] <https://github.com/Perl/perl5/issues/15475>.
+.IP \(bu 4
+Many issues relating to \f(CW\*(C`printf "%a"\*(C'\fR of hexadecimal floating point were
+fixed. In addition, the "subnormals" (formerly known as "denormals") floating
+point numbers are now supported both with the plain IEEE 754 floating point
+numbers (64\-bit or 128\-bit) and the x86 80\-bit "extended precision". Note that
+subnormal hexadecimal floating point literals will give a warning about
+"exponent underflow".
+[GH #15495] <https://github.com/Perl/perl5/issues/15495>
+[GH #15502] <https://github.com/Perl/perl5/issues/15502>
+[GH #15503] <https://github.com/Perl/perl5/issues/15503>
+[GH #15504] <https://github.com/Perl/perl5/issues/15504>
+[GH #15505] <https://github.com/Perl/perl5/issues/15505>
+[GH #15510] <https://github.com/Perl/perl5/issues/15510>
+[GH #15512] <https://github.com/Perl/perl5/issues/15512>
+.IP \(bu 4
+The parser could sometimes crash if a bareword came after \f(CW\*(C`evalbytes\*(C'\fR.
+[GH #15586] <https://github.com/Perl/perl5/issues/15586>
+.IP \(bu 4
+Fixed a place where the regex parser was not setting the syntax error correctly
+on a syntactically incorrect pattern.
+[GH #15565] <https://github.com/Perl/perl5/issues/15565>
+.IP \(bu 4
+A vulnerability in Perl's \f(CW\*(C`sprintf\*(C'\fR implementation has been fixed by avoiding
+a possible memory wrap.
+[GH #15970] <https://github.com/Perl/perl5/issues/15970>
+.SH Acknowledgements
+.IX Header "Acknowledgements"
+Perl 5.24.3 represents approximately 2 months of development since Perl 5.24.2
+and contains approximately 3,200 lines of changes across 120 files from 23
+authors.
+.PP
+Excluding auto-generated files, documentation and release tools, there were
+approximately 1,600 lines of changes to 56 .pm, .t, .c and .h files.
+.PP
+Perl continues to flourish into its third decade thanks to a vibrant community
+of users and developers. The following people are known to have contributed
+the improvements that became Perl 5.24.3:
+.PP
+Aaron Crane, Craig A. Berry, Dagfinn Ilmari Mannsåker, Dan Collins, Daniel
+Dragan, Dave Cross, David Mitchell, Eric Herman, Father Chrysostomos, H.Merijn
+Brand, Hugo van der Sanden, James E Keenan, Jarkko Hietaniemi, John SJ
+Anderson, Karl Williamson, Ken Brown, Lukas Mai, Matthew Horsfall, Stevan
+Little, Steve Hay, Steven Humphrey, Tony Cook, Yves Orton.
+.PP
+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.
+.PP
+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.
+.PP
+For a more complete list of all of Perl's historical contributors, please see
+the \fIAUTHORS\fR file in the Perl source distribution.
+.SH "Reporting Bugs"
+.IX Header "Reporting Bugs"
+If you find what you think is a bug, you might check the articles recently
+posted to the comp.lang.perl.misc newsgroup and the perl bug database at
+<https://rt.perl.org/> . There may also be information at
+<http://www.perl.org/> , the Perl Home Page.
+.PP
+If you believe you have an unreported bug, please run the perlbug program
+included with your release. Be sure to trim your bug down to a tiny but
+sufficient test case. Your bug report, along with the output of \f(CW\*(C`perl \-V\*(C'\fR,
+will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
+.PP
+If the bug you are reporting has security implications which make it
+inappropriate to send to a publicly archived mailing list, then see
+"SECURITY VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to
+report the issue.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+The \fIChanges\fR file for an explanation of how to view exhaustive details on
+what changed.
+.PP
+The \fIINSTALL\fR file for how to build Perl.
+.PP
+The \fIREADME\fR file for general stuff.
+.PP
+The \fIArtistic\fR and \fICopying\fR files for copyright information.