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[perl #130010] v5.25.5-184-ga5540cf breaks texinfo

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From:
James E Keenan via RT
Date:
November 9, 2016 21:39
Subject:
[perl #130010] v5.25.5-184-ga5540cf breaks texinfo
Message ID:
rt-4.0.24-5212-1478727571-1984.130010-15-0@perl.org
On Wed, 09 Nov 2016 16:22:58 GMT, hv wrote:
> I built and installed blead@392582f8 with './Configure -des -Dcc=gcc
> -Dprefix=/opt/blead-d0 -Doptimize='-g -O0' -DDEBUGGING -Dusedevel
> -Uversiononly'.
> 
> On attempting the texinfo build, the first point it gives the error
> can be simplified to this command:
> % ( cd doc && TEXINFO_DEV_SOURCE=1 top_srcdir=".." top_builddir=".."
> ${PERL} ../tp/texi2any -I . -o texinfo.info texinfo.texi )
> Modification of a read-only value attempted at
> ../tp/Texinfo/Convert/ParagraphNonXS.pm line 327.
> panic: POPSTACK
>  %
> 
> After a quick grep for the error message (found in perl.h) and then
> for PL_no_modify, I rebuilt and installed the perl with this patch:
> --- a/util.c
> +++ b/util.c
> @@ -1877,6 +1877,7 @@ paths reduces CPU cache pressure.
>  void
>  Perl_croak_no_modify(void)
>  {
> +    assert(0);
>      Perl_croak_nocontext( "%s", PL_no_modify);
>  }
> 
> On reinvoking the above command, I get a core dump with the backtrace
> below. I'll try to cut down the repro case, but the backtrace might
> allow others to make some progress in the meantime.
> 
> Hugo
> 
> (gdb) where
> #0  0x00007f60916d2cc9 in __GI_raise (sig=sig@entry=6)
>     at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
> #1  0x00007f60916d60d8 in __GI_abort () at abort.c:89
> #2  0x00007f60916cbb86 in __assert_fail_base (
>      fmt=0x7f609181c830 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
>      assertion=assertion@entry=0x7de9ce "0", file=file@entry=0x7dcd77
> "util.c",
>      line=line@entry=1880,
>     function=function@entry=0x7e25b0 <__PRETTY_FUNCTION__.15620>
> "Perl_croak_no_modify") at assert.c:92
>  #3  0x00007f60916cbc32 in __GI___assert_fail (assertion=0x7de9ce "0",
>      file=0x7dcd77 "util.c", line=1880,
>     function=0x7e25b0 <__PRETTY_FUNCTION__.15620>
> "Perl_croak_no_modify")
>     at assert.c:101
> #4  0x000000000056162e in Perl_croak_no_modify () at util.c:1880
> #5  0x00000000005ed6f1 in Perl_sv_force_normal_flags (sv=0x712f998,
> flags=4)
>     at sv.c:5248
>  #6  0x00000000005ec24f in Perl_sv_usepvn_flags (sv=0x712f998,
>     ptr=0x7134ac0 "", len=328, flags=256) at sv.c:5087
>  #7  0x000000000050afb6 in S_invlist_replace_list_destroys_src
> (dest=0x712f998,
>     src=0x712f9b0) at regcomp.c:8492
> #8  0x000000000050d26e in Perl__invlist_union_maybe_complement_2nd (
>     a=0x384be30, b=0x712f998, complement_b=false,
> output=0x7fff2ed01748)
>     at regcomp.c:9243
>  #9  0x00000000006fa6d9 in Perl__core_swash_init (pkg=0x7d024a "utf8",
>      name=0x7c5966 "", listsv=0x384bdb8, minbits=1, none=0,
> invlist=0x384be30,
>     flags_p=0x7fff2ed01990 "\005") at utf8.c:3401
>  #10 0x000000000053b7df in Perl__get_regclass_nonbitmap_data
> (prog=0x38460b0,
>      node=0x3854e5c, doinit=true, listsvp=0x0,
>     only_utf8_locale_ptr=0x7fff2ed01ad0, output_invlist=0x0) at
> regcomp.c:18080
>  #11 0x00000000006f0464 in S_reginclass (prog=0x38460b0, n=0x3854e5c,
>     p=0x2cf63a0 "This is ", p_end=0x2cf63a1 "his is ",
> utf8_target=false)
>     at regexec.c:9338
>  #12 0x00000000006e33e6 in S_regmatch (reginfo=0x7fff2ed024a0,
>     startpos=0x2cf63a0 "This is ", prog=0x3854dc0) at regexec.c:6342
>  #13 0x00000000006d8d83 in S_regtry (reginfo=0x7fff2ed024a0,
>     startposp=0x7fff2ed02308) at regexec.c:3641
>  #14 0x00000000006d87fb in Perl_regexec_flags (rx=0x384bc80,
>      stringarg=0x2cf63a0 "This is ", strend=0x2cf63a8 "",
>     strbeg=0x2cf63a0 "This is ", minend=1, sv=0x384bbc0, data=0x0,
> flags=0)
>     at regexec.c:3498
> #15 0x000000000064c198 in Perl_pp_split () at pp.c:6022
> #16 0x000000000055acf1 in Perl_runops_debug () at dump.c:2249
> #17 0x0000000000462aa2 in S_run_body (oldscope=1) at perl.c:2526
> #18 0x0000000000462093 in perl_run (my_perl=0x26cf010) at perl.c:2449
>  #19 0x000000000041ef95 in main (argc=7, argv=0x7fff2ed029e8,
>     env=0x7fff2ed02a28) at perlmain.c:123

Another backtrace:

https://gist.github.com/jkeenan/6dbf40aa5d4301511b287961d8d8f7db

-- 
James E Keenan (jkeenan@cpan.org)

---
via perlbug:  queue: perl5 status: open
https://rt.perl.org/Ticket/Display.html?id=130010

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