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op.c:10706: OP *Perl_ck_refassign(OP *): Assertion `left->op_type == OP_SREFGEN' failed #15812

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p5pRT opened this issue Jan 17, 2017 · 7 comments
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@p5pRT
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@p5pRT p5pRT commented Jan 17, 2017

Migrated from rt.perl.org#130578 (status was 'resolved')

Searchable as RT130578$

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@p5pRT p5pRT commented Jan 17, 2017

From @geeknik

Triggered with Perl v5.25.8-195-gc1b4bd9.

./perl -e '\$0=~y((()))00=0'
perl​: op.c​:10706​: OP *Perl_ck_refassign(OP *)​: Assertion `left->op_type ==
OP_SREFGEN' failed.
Aborted

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@p5pRT p5pRT commented Jan 18, 2017

From @tonycoz

On Tue, 17 Jan 2017 15​:08​:56 -0800, brian.carpenter@​gmail.com wrote​:

Triggered with Perl v5.25.8-195-gc1b4bd9.

./perl -e '\$0=~y((()))00=0'
perl​: op.c​:10706​: OP *Perl_ck_refassign(OP *)​: Assertion `left->op_type ==
OP_SREFGEN' failed.
Aborted

This can be simplified to​:

./perl -e '\$0=~y/x//=0'

The op tree where at the point of the assertion is​:

#4 0x00000000004897b8 in Perl_ck_refassign (o=0x61900000bd00) at op.c​:10719
10719 assert (left->op_type == OP_SREFGEN);
(gdb) call Perl_op_dump(o)
{
1 TYPE = refassign ===> NULL
  FLAGS = (UNKNOWN,KIDS,STACKED,SLABBED)
  PRIVATE = (SV,0x2)
  {
2 TYPE = const ===> 2
  FLAGS = (SCALAR,SLABBED,MORESIB)
  SV = IV(0)
  }
  {
3 TYPE = null ===> NULL
  FLAGS = (UNKNOWN,KIDS,STACKED,SLABBED)
  PRIVATE = (0x2)
  {
4 TYPE = srefgen ===> NULL
  FLAGS = (SCALAR,KIDS,SLABBED,MORESIB)
  PRIVATE = (0x1)
  {
5 TYPE = null ===> NULL
  (was list)
  FLAGS = (LIST,KIDS,REF,MOD,SLABBED)
  {
6 TYPE = rv2sv ===> NULL
  FLAGS = (SCALAR,KIDS,REF,MOD,SLABBED)
  PRIVATE = (0x1)
  {
7 TYPE = gv ===> 7
  FLAGS = (SCALAR,SLABBED)
  GV = main​::0
  }
  }
  }
  }
  {
8 TYPE = trans ===> 8
  FLAGS = (SCALAR,STACKED,SLABBED)
  PRIVATE = (IDENT)
  }
  }
}

Tony

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@p5pRT p5pRT commented Jan 18, 2017

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

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@p5pRT p5pRT commented Dec 6, 2017

From zefram@fysh.org

Fixed in commit 38a3df7.

-zefram

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@p5pRT p5pRT commented Dec 6, 2017

@xsawyerx - Status changed from 'open' to 'pending release'

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@p5pRT p5pRT commented Jun 23, 2018

From @khwilliamson

Thank you for filing this report. You have helped make Perl better.

With the release yesterday of Perl 5.28.0, this and 185 other issues have been
resolved.

Perl 5.28.0 may be downloaded via​:
https://metacpan.org/release/XSAWYERX/perl-5.28.0

If you find that the problem persists, feel free to reopen this ticket.

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@p5pRT p5pRT commented Jun 23, 2018

@khwilliamson - Status changed from 'pending release' to 'resolved'

@p5pRT p5pRT closed this Jun 23, 2018
@p5pRT p5pRT added the Severity Low label Oct 19, 2019
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