Hey everyone,

Following is the p5p (Perl 5 Porters) mailing list summary for the past month.

Enjoy!

December 11th - January 1st

Happy holidays!

News and Updates

Perl 5.27.7 is released!

The new smart match broke a considerable amount of CPAN modules and will therefore be reverted.

Andreas Koenig provided a patch to update CPAN.pm to 2.20-TRIAL.

Dave Mitchell suggested making PERL_OP_PARENT compulsory in 5.28.0. This has since been done.

Karl Williamson provided a new version of his implementation of script runs.

Is it time to declare string- and number-specific bitwise ops fully stable and enable it in use v5.28? Check Perl #123707.

Pip Cet provided an explanation of how he uses the SpiderMonkey GC to find memory leaks in Perl.

podlators 4.10 is out.

Grant Reports

• Dave Mitchell TPF Grant 10 report 2.
• Dave Mitchell TPF Grant 10 report 3.
• Zefram TPF Grant 2017 Week 50 report.
• Zefram TPF Grant 2017 Week 51 report.
• Zefram TPF Grant 2017 Week 52 report.
• Zefram TPF Grant 2017 December report.

Issues

New Issues

• Perl #131990: Heap-buffer-over-flow in Storable::retrieve that could lead to RCE.
• Perl #131999: Heap-buffer-over-flow in Storable.xs: retrieve_hook that could lead to RCE.
• Perl #132544: heap-buffer-overflow in Perl_pp_reverse.
• Perl #132545: Double macro argument evaluation in S_init_main_stash.
• Perl #132560: perl-5.24.3, wrong Configure test for IPC_STAT.
• Perl #132561: miniperl segfault on blead (duplocale / S_my_nl_langinfo).
• Perl #132576: deprecate h2ph.
• Perl #132577: BBC Module::Install broken by 0301e899536a22752f40481d8a1d141b7a7dda82.
• Perl #132578: BBC List::MoreUtils::XS broken by 16ada235c332e017667585e1a5a00ce43a31c529.
• Perl #132579: bogus "at EOF" in syntax error location.
• Perl #132583: Assertion failure in perl_yylex.
• Perl #132584: in-place sort retains blessedness.
• Perl #132586: in-place sort retains tiedness.
• Perl #132588: In-place sort does not kill weak refs.
• Perl #132589: experimental bitwise feature breaks PDL's & operator.
• Perl #132590: in-place sort retains readonlyness.
• Perl #132594: BBC smartmatch da4e040f42421764ef069371d77c008e6b801f45.
• Perl #132595: multiconcat reading and fetching wrong order.
• Perl #132598: index() confused by tie side effects.
• Perl #132607: Chained comparison.
• Perl #132628: Feature: get "name" of lvalue expression.
• Perl #132630: Assertion failure in Perl_fbm_instr.
• Perl #132631: keys %SIG contains SIGUNUSED.
• Perl #132633: [Win32] 5.27.7 fails all tests.
• Perl #132626: perl5 sprintf: wrong output on format %a.
• Perl #132634: Strange bug in the new given/whereis/whereso construct (perl-5.27.7).
• Perl #132638: I've discovered a segfault.
• Perl #132644: The each function documentation is missing some information.
• Perl #132645: Array names starting with Inf can be poorly behaved.
• Perl #132646: Bleadperl v5.27.6-120-gbcc30fd027 breaks GARU/Data-Printer-0.40.tar.gz.
• Perl #132647: $1 not localized when calling sub.
• Perl #132648: Cwd: different return values between pure perl and XS variants.
• Perl #132649: Definition of % operator may be wrong for negative divisors.
• Perl #132651: commit d2e38af7 exhausts swap space on FreeBSD.
• Perl #132653: Step-by-step debugging do not work for if elsif elsif.
• Perl #132663: t/io/fs.t failures on NetBSD with noatime mounts.
• Perl #132665: Always use STOP_AT_PARTIAL in PerlIO::encoding.
• Perl #132671: Bleadperl v5.27.6-206-g16ada235c3 breaks JGAMBLE/Algorithm-QuineMcCluskey-0.16.tar.gz.

Resolved Issues

• Perl #4574: readpipe() broken: 2 bugs.
• Perl #6997: "Useless use of concatenation" warning not triggered by multiple concatenations.
• Perl #74764: -E given( goto f ) { f: } => crash.
• Perl #90888: Using each @array as while iterator exits on first (0th) index.
• Perl #92264: Freeing $a or $b during sort causes a double free.
• Perl #104116: dump.c cannot dump Unicode stash names.
• Perl #105930: eval 'UNITCHECK{die} crashes inside FETCH.
• Perl #110056: installhtml uses absolute paths in links.
• Perl #110520: pod2html 1.12 & 1.13 broken.
• Perl #112104: die($object) in thread reblesses $object into main and breaks stringification.
• Perl #112732: Subs ending in { @a } return list, not hashref; can Perl defend against this trap?
• Perl #113090: Data::Dumper -- undef not recognized as "false" in config booleans.
• Perl #114316: --splithead option to installhtml fails to clean up after itself.
• Perl #114318: --splithead option to installhtml creates incorrect links.
• Perl #114798: Configure: add support of qemu.
• Perl #115252: Inconsistent treatment of nulls and newlines in ....
• Perl #115754: sub refs returned from @INC hooks receive wrong parameters.
• Perl #116080: Doc issues for system, exec, qx.
• Perl #117449: GDBM tied hash weirdness; deletion ends each loop.
• Perl #119367: Another 32-bit residual in 64-bit perl 5.18.
• Perl #119623: GDBM_FILE: gdbm_open requires a blocksize to be a power of two.
• Perl #120982: IO::Select->select() returns empty list even if there were no errors.
• Perl #121105: During a system(), unquoted Perl vars are evaluated after the fork() call.
• Perl #121372: warn broken when operand is overloaded.
• Perl #121761: Update perlobj because DESTROY no longer clobbers $@.
• Perl #122670: Module::CoreList version problems.
• Perl #122753: Docs on destructors are inaccurate.
• Perl #123707: [EXPERIMENT] String- and number-specific bitwise ops.
• Perl #126085: Not expected arguments for $SIG{__WARN__} handler.
• Perl #128316: CORE::socket() mangles EMFILE and turns it into EBADF.
• Perl #128765: Custom warnings categories are disabled by any preceding no warnings 'category'.
• Perl #129888: null ptr deref, segfault in Perl_do_aexec5.
• Perl #130550: Out of bounds read when calling perl from C.
• Perl #130726: semicolons on *_DIAG_{IGNORE,RESTORE}.
• Perl #130818: [PATCH] Remove EPOC and MacOS Classic support from PathTools.
• Perl #130851: [PATCH] socket SOCK_CLOEXEC.
• Perl #131296: Combination of File::Spec->catdir() and do FILE problematic.
• Perl #131312: CPAN.pm still buggy in RC1.
• Perl #131518: [PATCH] -mpragma (eg strict) fail silent blindsiding.
• Perl #131664: Interpolation of @{^CAPTURE} and its friends doesn't work.
• Perl #132247: XSLoader and DynaLoader documentation bugs.
• Perl #132468: warnings.pm provides no way to specify the call frame.
• Perl #132481: Minor doc bug in pod/perlop.pod.
• Perl #132544: heap-buffer-overflow in Perl_pp_reverse.
• Perl #132545: Double macro argument evaluation in S_init_main_stash.
• Perl #132626: perl5 sprintf: wrong output on format %a.
• Perl #132633: [Win32] 5.27.7 fails all tests.
• Perl #132634: Strange bug in the new given/whereis/whereso construct (perl-5.27.7).
• Perl #132644: The each function documentation is missing some information.
• Perl #132645: Array names starting with Inf can be poorly behaved.
• Perl #132646: Bleadperl v5.27.6-120-gbcc30fd027 breaks GARU/Data-Printer-0.40.tar.gz.
• Perl #132648: Cwd: different return values between pure perl and XS variants.
• Perl #132651: commit d2e38af7 exhausts swap space on FreeBSD.

Rejected Issues

• Perl #77510: when() as a statement modifier outside a topicalizer both works and fails.
• Perl #77690: warnings::enabled, ::warnif etc. provide no way to specify the number of call frames.
• Perl #77974: [PATCH] Record method calls in the context stack.
• Perl #90134: s2p doesn't understand sed anymore.
• Perl #90240: keys(@array) gives too many indices.
• Perl #96538: Closures returned from threads don't wrap around the right lexicals.
• Perl #105278: Add warning for exists($a[0]) and delete($a[0]).
• Perl #109204: UTF-8 bug in Test::More and/or Test::Builder.
• Perl #113898: File::Spec::Unix->catfile("./a") ne File::Spec::Unix->catfile(".", "a").
• Perl #114786: EXISTS and SCALAR return values are treated differently.
• Perl #115834: Successfull match $_[0] =~ /foo(.+)/ overrides $_[0] if function called as foo($1).
• Perl #116020: toggle operator missing reset: proposal.
• Perl #119127: RFE: file handle duping in the Bourne shell tradition.
• Perl #119315: [EXPERIMENT] the lexical topic, my $_.
• Perl #119863: bug in Math::BigInt with undef.
• Perl #121023: CPAN misinterprets 404 status as 407.
• Perl #121646: while each %$ref clobbers @_ in some circumstances.
• Perl #122905: pod2html crash on Linux.
• Perl #123292: hash dereference of undefined value.
• Perl #123698: 5.20 threaded regression: boolean.pm -truth option breaks string literals in closures.
• Perl #123881: compiler warnings when building perl 5.20.1 with glibc 2.20/gcc 4.9.1 (Hardened Gentoo).
• Perl #127640: RFE: qqw( $var/x $var/y word3 $var4=word4 ).
• Perl #128349: Benchmark module doesn't use documented format for times.
• Perl #130038: Builtin variable for loop index in foreach.
• Perl #130818: [PATCH] Remove EPOC and MacOS Classic support from PathTools.

Suggested Patches

Marco Fontani provided another patch (which was merged) to resolve Perl #116080 (Doc issues for system, exec, qx).

Karl Williamson wonders (regrepeat()) whether we should introduce an optimization for repeating characters on a pattern like (foo)+.

Discussions

Leon raised the need for a language design process.

Zefram raised (smartmatch/switch deprecation for 5.28) the topic of smart match again with regards to what to deprecate in smart match.

Karl Williamson suggested two deprecations: literal \v in patterns except under /x and /[#]/xx.