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S_gv_stashpvn_internal: Assertion `((svtype)((_gvgp)->sv_flags & 0xff)) == SVt_PVGV || ((svtype)((_gvgp)->sv_flags & 0xff)) == SVt_PVLV' failed (gv.c:1416) #14790

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p5pRT opened this issue Jul 3, 2015 · 6 comments
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@p5pRT p5pRT commented Jul 3, 2015

Migrated from rt.perl.org#125541 (status was 'resolved')

Searchable as RT125541$

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@p5pRT p5pRT commented Jul 3, 2015

From @geeknik

The attached script causes an assertion failure in Perl v5.23.0-69-gf907dd3. Does not crash or cause any errors in Perl 5.21.6-602-ge9d2bd8.

perl​: gv.c​:1416​: S_gv_stashpvn_internal​: Assertion `((svtype)((_gvgp)->sv_flags & 0xff)) == SVt_PVGV || ((svtype)((_gvgp)->sv_flags & 0xff)) == SVt_PVLV' failed.

Program received signal SIGABRT, Aborted.
0x00007ffff6d90165 in *__GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c​:64
64 ../nptl/sysdeps/unix/sysv/linux/raise.c​: No such file or directory.
(gdb) bt
#0 0x00007ffff6d90165 in *__GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c​:64
#1 0x00007ffff6d933e0 in *__GI_abort () at abort.c​:92
#2 0x00007ffff6d89311 in *__GI___assert_fail (
  assertion=0xeb4b30 "((svtype)((_gvgp)->sv_flags & 0xff)) == SVt_PVGV || ((svtype)((_gvgp)->sv_flags & 0xff)) == SVt_PVLV", file=<optimized out>, line=1416, function=0xef2580 "S_gv_stashpvn_internal")
  at assert.c​:81
#3 0x0000000000562d15 in Perl_gv_stashsv () at gv.c​:1416
#4 0x0000000000907453 in Perl_pp_method_redir () at pp_hot.c​:3583
#5 0x00000000007cdfcf in Perl_runops_debug () at dump.c​:2224
#6 0x000000000053c819 in perl_run ()
#7 0x000000000042af18 in main () at perlmain.c​:116
(gdb) i r
rax 0x0 0
rbx 0x7fffffffe624 140737488348708
rcx 0xffffffffffffffff -1
rdx 0x6 6
rsi 0xeead 61101
rdi 0xeead 61101
rbp 0x7ffff6ea9c67 0x7ffff6ea9c67
rsp 0x7fffffffde58 0x7fffffffde58
r8 0x7ffff7fdc700 140737353991936
r9 0x564c56505f745653 6218440088690644563
r10 0x8 8
r11 0x202 514
r12 0xeb4b30 15420208
r13 0xef2580 15672704
r14 0x7ffff6ea9c67 140737335958631
r15 0x588 1416
rip 0x7ffff6d90165 0x7ffff6d90165 <*__GI_raise+53>
eflags 0x202 [ IF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0

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@p5pRT p5pRT commented Jul 3, 2015

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@p5pRT p5pRT commented Jul 7, 2015

From @cpansprout

On Fri Jul 03 10​:03​:56 2015, brian.carpenter@​gmail.com wrote​:

The attached script causes an assertion failure in Perl v5.23.0-69-
gf907dd3. Does not crash or cause any errors in Perl 5.21.6-602-
ge9d2bd8.

When I try bisecting, it crashes for all perls I can compile.

Here is my one-liner version​:

$ ./miniperl -e '%​::=(); J->${\"​::"}'

gv_fetchpvn_flags assumes that $​::{"main​::"} holds a GV. If it does not, things go awry. %​::=() is what wipes $​::{"main​::"}. So the solution would be to restore *main​:: somewhere, but I am not sure which would be the best place to do it.

--

Father Chrysostomos

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@p5pRT p5pRT commented Jul 7, 2015

The RT System itself - Status changed from 'new' to 'open'

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@p5pRT p5pRT commented Jul 24, 2015

From @cpansprout

Fixed in d2fcb1d.

--

Father Chrysostomos

@p5pRT p5pRT closed this Jul 24, 2015
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@p5pRT p5pRT commented Jul 24, 2015

@cpansprout - Status changed from 'open' to 'resolved'

@p5pRT p5pRT added the Severity Low label Oct 19, 2019
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