segfault from assign.t, golfed down

01-segfault.t

sub is($a, $b, $c) { };
sub l () {1, 2}
{
    my %a;
    my @z = (%a{'x'..'z'} = l, l);
    say %a<x>;
    say @z;
    is(%a<x>, 1,    q/lhs treats %a{'x'..'z'} as list/);
    is(%a<y>, 2,    q/lhs treats %a{'x'..'z'} as list/);
    is(%a<z>, 1,    q/lhs treats %a{'x'..'z'} as list/);
    is(@z[0], 1,    q/lhs treats %a{'x'..'z'} as list/);
    is(@z[1], 2,    q/lhs treats %a{'x'..'z'} as list/);
    is(@z[2], 1,    q/lhs treats %a{'x'..'z'} as list/);
}

02-backtrace

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff40df7d9 in decontainerize ()
   from /home/moritz/p6/rakudo/install/lib/parrot/3.6.0-devel/dynext/nqp_group.so
(gdb) bt
#0  0x00007ffff40df7d9 in decontainerize ()
   from /home/moritz/p6/rakudo/install/lib/parrot/3.6.0-devel/dynext/nqp_group.so
#1  0x00007ffff40df994 in Parrot_SixModelObject_defined ()
   from /home/moritz/p6/rakudo/install/lib/parrot/3.6.0-devel/dynext/nqp_group.so
#2  0x00007ffff7a20dc2 in Parrot_defined_i_p ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#3  0x00007ffff7a71106 in runops_fast_core ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#4  0x00007ffff7a70dea in runops_int ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#5  0x00007ffff7a590be in runops ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#6  0x00007ffff7a546be in Parrot_pcc_invoke_from_sig_object ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#7  0x00007ffff3a43c10 in Rakudo_cont_store () from dynext/perl6_ops.so
#8  0x00007ffff3a36929 in Parrot_perl6_container_store_p_p ()
   from dynext/perl6_ops.so
#9  0x00007ffff7a71106 in runops_fast_core ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#10 0x00007ffff7a70dea in runops_int ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#11 0x00007ffff7a590be in runops ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#12 0x00007ffff7a546be in Parrot_pcc_invoke_from_sig_object ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#13 0x00007ffff3a43d40 in Rakudo_cont_store () from dynext/perl6_ops.so
#14 0x00007ffff3a36929 in Parrot_perl6_container_store_p_p ()
   from dynext/perl6_ops.so
#15 0x00007ffff7a71106 in runops_fast_core ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#16 0x00007ffff7a70dea in runops_int ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#17 0x00007ffff7a590be in runops ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#18 0x00007ffff7a546be in Parrot_pcc_invoke_from_sig_object ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#19 0x00007ffff7a547f1 in Parrot_pcc_invoke_sub_from_c_args ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#20 0x00007ffff7a7b4de in Parrot_pf_execute_bytecode_program ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#21 0x00007ffff7a447aa in Parrot_api_run_bytecode ()
   from /home/moritz/p6/rakudo/install/lib/libparrot.so.3.6.0
#22 0x0000000000401510 in main ()
(gdb)