[Bug 1786000] New: Perl 5.30 always crashed at Perl__invlist_intersection_maybe_complement_2nd by segfault.

https://bugzilla.redhat.com/show_bug.cgi?id=1786000

            Bug ID: 1786000
           Summary: Perl 5.30 always crashed at
                    Perl__invlist_intersection_maybe_complement_2nd by
                    segfault.
           Product: Fedora
           Version: 31
            Status: NEW
         Component: perl
          Severity: high
          Assignee: jplesnik(a)redhat.com
          Reporter: knoha(a)redhat.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: caillon+fedoraproject(a)gmail.com, iarnell(a)gmail.com,
                    jplesnik(a)redhat.com, kasal(a)ucw.cz,
                    mmaslano(a)redhat.com,
                    perl-devel(a)lists.fedoraproject.org, ppisar(a)redhat.com,
                    psabata(a)redhat.com, rhughes(a)redhat.com,
                    sandmann(a)redhat.com, tcallawa(a)redhat.com
  Target Milestone: ---
    Classification: Fedora



Description of problem:
When I launch weechat, the process always crashed at perl module loading.

The backtrace is
~~~
(gdb) bt
#0  0x00007fc780bcb625 in raise () from /lib64/libc.so.6
#1  0x00007fc780bb48d9 in abort () from /lib64/libc.so.6
#2  0x000055b95e108c75 in weechat_shutdown.cold ()
#3  <signal handler called>
#4  0x00007fc772675c53 in Perl__invlist_intersection_maybe_complement_2nd ()
from /lib64/libperl.so.5.30
#5  0x00007fc772676295 in S_populate_ANYOF_from_invlist.part.0 () from
/lib64/libperl.so.5.30
#6  0x00007fc772685d7f in S_regclass () from /lib64/libperl.so.5.30
#7  0x00007fc77268c5e6 in S_regpiece () from /lib64/libperl.so.5.30
#8  0x00007fc772690e69 in S_regbranch () from /lib64/libperl.so.5.30
#9  0x00007fc772691405 in S_reg () from /lib64/libperl.so.5.30
#10 0x00007fc77269639c in Perl_re_op_compile () from /lib64/libperl.so.5.30
#11 0x00007fc77262af75 in Perl_pmruntime () from /lib64/libperl.so.5.30
#12 0x00007fc77266789b in Perl_yyparse () from /lib64/libperl.so.5.30
#13 0x00007fc7727089c7 in S_doeval_compile () from /lib64/libperl.so.5.30
#14 0x00007fc77270e3b4 in Perl_pp_require () from /lib64/libperl.so.5.30
#15 0x00007fc7726c3606 in Perl_runops_standard () from /lib64/libperl.so.5.30
#16 0x00007fc77263102c in Perl_call_sv () from /lib64/libperl.so.5.30
#17 0x00007fc772633b95 in Perl_call_list () from /lib64/libperl.so.5.30
#18 0x00007fc7726110b0 in S_process_special_blocks.isra.0 () from
/lib64/libperl.so.5.30
#19 0x00007fc772629d3f in Perl_newATTRSUB_x () from /lib64/libperl.so.5.30
#20 0x00007fc77262d2e2 in Perl_utilize () from /lib64/libperl.so.5.30
#21 0x00007fc772667d39 in Perl_yyparse () from /lib64/libperl.so.5.30
#22 0x00007fc7727089c7 in S_doeval_compile () from /lib64/libperl.so.5.30
#23 0x00007fc77270e3b4 in Perl_pp_require () from /lib64/libperl.so.5.30
#24 0x00007fc7726c3606 in Perl_runops_standard () from /lib64/libperl.so.5.30
#25 0x00007fc772631789 in Perl_eval_sv () from /lib64/libperl.so.5.30
#26 0x00007fc772631b1d in Perl_eval_pv () from /lib64/libperl.so.5.30
#27 0x00007fc772927624 in weechat_perl_load () from
/usr/lib64/weechat/plugins/perl.so
#28 0x000055b95e14078c in util_exec_on_files ()
#29 0x00007fc772dfb455 in plugin_script_auto_load () from
/usr/lib64/weechat/plugins/guile.so
#30 0x00007fc772dfb868 in plugin_script_init () from
/usr/lib64/weechat/plugins/guile.so
#31 0x00007fc77292a93c in weechat_plugin_init () from
/usr/lib64/weechat/plugins/perl.so
#32 0x000055b95e1857db in plugin_call_init ()
#33 0x000055b95e1871d5 in plugin_auto_load ()
#34 0x000055b95e1878b0 in plugin_init ()
#35 0x000055b95e109fb0 in weechat_init ()
#36 0x000055b95e108cc8 in main ()
~~~

The issue seems to be same as https://github.com/Perl/perl5/issues/17154.
It looks that we should rebase perl to the fixed version because the fix can't
be backportable into perl5.30.

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