PERL5222DELTA(1) Perl Programmers Reference Guide PERL5222DELTA(1)

PERL5222DELTA(1) Perl Programmers Reference Guide PERL5222DELTA(1) #

PERL5222DELTA(1) Perl Programmers Reference Guide PERL5222DELTA(1)

NNAAMMEE #

 perl5222delta - what is new for perl v5.22.2

DDEESSCCRRIIPPTTIIOONN #

 This document describes differences between the 5.22.1 release and the
 5.22.2 release.

 If you are upgrading from an earlier release such as 5.22.0, first read
 perl5221delta, which describes differences between 5.22.0 and 5.22.1.

SSeeccuurriittyy FFiixx oouutt ooff bboouunnddaarryy aacccceessss iinn WWiinn3322 ppaatthh hhaannddlliinngg This is CVE-2015-8608. For more information see [GH #15067] https://github.com/Perl/perl5/issues/15067.

FFiixx lloossss ooff ttaaiinntt iinn “"ccaannoonnppaatthh(())“” This is CVE-2015-8607. For more information see [GH #15084] https://github.com/Perl/perl5/issues/15084.

SSeett pprrooppeerr uummaasskk bbeeffoorree ccaalllliinngg mmkksstteemmpp((33)) In 5.22.0 perl started setting umask to 0600 before calling mkstemp(3) and restoring it afterwards. This wrongfully tells open(2) to strip the owner read and write bits from the given mode before applying it, rather than the intended negation of leaving only those bits in place.

 Systems that use mode 0666 in mkstemp(3) (like old versions of glibc)
 create a file with permissions 0066, leaving world read and write
 permissions regardless of current umask.

 This has been fixed by using umask 0177 instead.

 [GH #15135] <https://github.com/Perl/perl5/issues/15135>

AAvvooiidd aacccceessssiinngg uunniinniittiiaalliizzeedd mmeemmoorryy iinn WWiinn3322 “"ccrryypptt(())“” Validation that will detect both a short salt and invalid characters in the salt has been added.

 [GH #15091] <https://github.com/Perl/perl5/issues/15091>

RReemmoovvee dduupplliiccaattee eennvviirroonnmmeenntt vvaarriiaabblleess ffrroomm “"eennvviirroonn"” Previously, if an environment variable appeared more than once in “environ[]”, %ENV would contain the last entry for that name, while a typical “getenv()” would return the first entry. We now make sure %ENV contains the same as what “getenv()” returns.

 Secondly, we now remove duplicates from "environ[]", so if a setting with
 that name is set in %ENV we won't pass an unsafe value to a child
 process.

 This is CVE-2016-2381.

IInnccoommppaattiibbllee CChhaannggeess There are no changes intentionally incompatible with Perl 5.22.1. If any exist, they are bugs, and we request that you submit a report. See “Reporting Bugs” below.

MMoodduulleess aanndd PPrraaggmmaattaa UUppddaatteedd MMoodduulleess aanndd PPrraaggmmaattaa • File::Spec has been upgraded from version 3.56 to 3.56_01.

     "canonpath()" now preserves taint.  See "Fix loss of taint in
     "canonpath()"".

 •   Module::CoreList has been upgraded from version 5.20151213 to
     5.20160429.

     The version number of Digest::SHA listed for Perl 5.18.4 was wrong
     and has been corrected.  Likewise for the version number of Config in
     5.18.3 and 5.18.4.  [GH #15202]
     <https://github.com/Perl/perl5/issues/15202>

DDooccuummeennttaattiioonn CChhaannggeess ttoo EExxiissttiinngg DDooccuummeennttaattiioonn _p_e_r_l_d_i_a_g

 •   The explanation of the warning "unable to close filehandle %s
     properly: %s" which can occur when doing an implicit close of a
     filehandle has been expanded and improved.

 _p_e_r_l_f_u_n_c

 •   The documentation of "hex()" has been revised to clarify valid
     inputs.

CCoonnffiigguurraattiioonn aanndd CCoommppiillaattiioonn • Dtrace builds now build successfully on systems with a newer dtrace that require an input object file that uses the probes in the _._d file.

     Previously the probe would fail and cause a build failure.

     [GH #13985] <https://github.com/Perl/perl5/issues/13985>

 •   _C_o_n_f_i_g_u_r_e no longer probes for _l_i_b_n_m by default.  Originally this was
     the "New Math" library, but the name has been re-used by the GNOME
     NetworkManager.

     [GH #15115] <https://github.com/Perl/perl5/issues/15115>

 •   _C_o_n_f_i_g_u_r_e now knows about gcc 5.

 •   Compiling perl with --DDPPEERRLL__MMEEMM__LLOOGG now works again.

PPllaattffoorrmm SSuuppppoorrtt PPllaattffoorrmm--SSppeecciiffiicc NNootteess Darwin Compiling perl with --DDuusseeccbbaacckkttrraaccee on Darwin now works again.

     [GH #15245] <https://github.com/Perl/perl5/issues/15245>

 OS X/Darwin
     Builds with both --DDDDEEBBUUGGGGIINNGG and threading enabled would fail with a
     "panic: free from wrong pool" error when built or tested from
     Terminal on OS X.  This was caused by perl's internal management of
     the environment conflicting with an atfork handler using the libc
     "setenv()" function to update the environment.

     Perl now uses "setenv()"/"unsetenv()" to update the environment on OS

X. #

     [GH #14955] <https://github.com/Perl/perl5/issues/14955>

 ppc64el
     The floating point format of ppc64el (Debian naming for little-endian
     PowerPC) is now detected correctly.

 Tru64
     A test failure in _t_/_p_o_r_t_i_n_g_/_e_x_t_r_e_f_s_._t has been fixed.

IInntteerrnnaall CChhaannggeess • An unwarranted assertion in “Perl_newATTRSUB_x()” has been removed. If a stub subroutine definition with a prototype has been seen, then any subsequent stub (or definition) of the same subroutine with an attribute was causing an assertion failure because of a null pointer.

     [GH #15081] <https://github.com/Perl/perl5/issues/15081>

SSeelleecctteedd BBuugg FFiixxeess • Calls to the placeholder &PL_sv_yes used internally when an “import()” or “unimport()” method isn’t found now correctly handle scalar context. [GH #14902] https://github.com/Perl/perl5/issues/14902

 •   The "pipe()" operator would assert for "DEBUGGING" builds instead of
     producing the correct error message.  The condition asserted on is
     detected and reported on correctly without the assertions, so the
     assertions were removed.  [GH #15015]
     <https://github.com/Perl/perl5/issues/15015>

 •   In some cases, failing to parse a here-doc would attempt to use freed
     memory.  This was caused by a pointer not being restored correctly.
     [GH #15009] <https://github.com/Perl/perl5/issues/15009>

 •   Perl now reports more context when it sees an array where it expects
     to see an operator, and avoids an assertion failure.  [GH #14472]
     <https://github.com/Perl/perl5/issues/14472>

 •   If a here-doc was found while parsing another operator, the parser
     had already read end of file, and the here-doc was not terminated,
     perl could produce an assertion or a segmentation fault.  This now
     reliably complains about the unterminated here-doc.  [GH #14789]
     <https://github.com/Perl/perl5/issues/14789>

 •   Parsing beyond the end of the buffer when processing a "#line"
     directive with no filename is now avoided.  [GH #15139]
     <https://github.com/Perl/perl5/issues/15139>

 •   Perl 5.22.0 added support for the C99 hexadecimal floating point
     notation, but sometimes misparsed hex floats.  This has been fixed.
     [GH #15120] <https://github.com/Perl/perl5/issues/15120>

 •   Certain regex patterns involving a complemented posix class in an
     inverted bracketed character class, and matching something else
     optionally would improperly fail to match.  An example of one that
     could fail is "qr/_?[^\Wbar]\x{100}/".  This has been fixed.  [GH
     #15181] <https://github.com/Perl/perl5/issues/15181>

 •   Fixed an issue with "pack()" where "pack "H"" (and "pack "h"") could
     read past the source when given a non-utf8 source and a utf8 target.
     [GH #14977] <https://github.com/Perl/perl5/issues/14977>

 •   Fixed some cases where perl would abort due to a segmentation fault,
     or a C-level assert.  [GH #14941]
     <https://github.com/Perl/perl5/issues/14941> [GH #14962]
     <https://github.com/Perl/perl5/issues/14962> [GH #14963]
     <https://github.com/Perl/perl5/issues/14963> [GH #14997]
     <https://github.com/Perl/perl5/issues/14997> [GH #15039]
     <https://github.com/Perl/perl5/issues/15039> [GH #15247]
     <https://github.com/Perl/perl5/issues/15247> [GH #15251]
     <https://github.com/Perl/perl5/issues/15251>

 •   A memory leak when setting $ENV{foo} on Darwin has been fixed.  [GH
     #14955] <https://github.com/Perl/perl5/issues/14955>

 •   Perl now correctly raises an error when trying to compile patterns
     with unterminated character classes while there are trailing
     backslashes.  [GH #14919]
     <https://github.com/Perl/perl5/issues/14919>

 •   "NOTHING" regops and "EXACTFU_SS" regops in "make_trie()" are now
     handled properly.  [GH #14945]
     <https://github.com/Perl/perl5/issues/14945>

 •   Perl now only tests "semctl()" if we have everything needed to use
     it.  In FreeBSD the "semctl()" entry point may exist, but it can be
     disabled by policy.  [GH #15180]
     <https://github.com/Perl/perl5/issues/15180>

 •   A regression that allowed undeclared barewords as hash keys to work
     despite strictures has been fixed.  [GH #15099]
     <https://github.com/Perl/perl5/issues/15099>

 •   As an optimization (introduced in Perl 5.20.0), "uc()", "lc()",
     "ucfirst()" and "lcfirst()" sometimes modify their argument in-place
     rather than returning a modified copy.  The criteria for this
     optimization has been made stricter to avoid these functions
     accidentally modifying in-place when they should not, which has been
     happening in some cases, e.g. in List::Util.

 •   Excessive memory usage in the compilation of some regular expressions
     involving non-ASCII characters has been reduced.  A more complete fix
     is forthcoming in Perl 5.24.0.

AAcckknnoowwlleeddggeemmeennttss Perl 5.22.2 represents approximately 5 months of development since Perl 5.22.1 and contains approximately 3,000 lines of changes across 110 files from 24 authors.

 Excluding auto-generated files, documentation and release tools, there
 were approximately 1,500 lines of changes to 52 .pm, .t, .c and .h files.

 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 5.22.2:

 Aaron Crane, Abigail, Andreas König, Aristotle Pagaltzis, Chris 'BinGOs'
 Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker, David Golden, David
 Mitchell, H.Merijn Brand, James E Keenan, Jarkko Hietaniemi, Karen
 Etheridge, Karl Williamson, Matthew Horsfall, Niko Tyni, Ricardo Signes,
 Sawyer X, Stevan Little, Steve Hay, Todd Rinaldo, Tony Cook, Vladimir
 Timofeev, Yves Orton.

 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 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.

 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 "perl
 -V", will be sent off to perlbug@perl.org to be analysed by the Perl
 porting team.

 If the bug you are reporting has security implications, which make it
 inappropriate to send to a publicly archived mailing list, then please
 send it to perl5-security-report@perl.org.  This points to a closed
 subscription unarchived mailing list, which includes all the core
 committers, who will be able to help assess the impact of issues, figure
 out a resolution, and help co-ordinate the release of patches to mitigate
 or fix the problem across all platforms on which Perl is supported.
 Please only use this address for security issues in the Perl core, not
 for modules independently distributed on CPAN.

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 PERL5222DELTA(1)