MoarVM Panic when running with small, 96k, nursery and GC_DEBUG=2

gistfile1.txt

dogbert@dogbert-VirtualBox ~/repos/rakudo $ gdb --args /home/dogbert/repos/rakudo/install/bin/moar --libpath="/home/dogbert/repos/rakudo/install/share/nqp/lib" --libpath="." /home/dogbert/repos/rakudo/perl6.moarvm -I /home/dogbert/repos/rakudo/install/share/perl6/site/lib  t/spec/S32-list/minmax.rakudo.moar
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Reading symbols from /home/dogbert/repos/rakudo/install/bin/moar...done.
(gdb) b MVM_panic
Function "MVM_panic" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (MVM_panic) pending.
(gdb) r
Starting program: /home/dogbert/repos/rakudo/install/bin/moar --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=. /home/dogbert/repos/rakudo/perl6.moarvm -I /home/dogbert/repos/rakudo/install/share/perl6/site/lib t/spec/S32-list/minmax.rakudo.moar
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

Breakpoint 1, MVM_panic (exitCode=1, messageFormat=0xb7cdbf64 "Collectable %p in fromspace accessed") at src/core/exceptions.c:781
781	    fprintf(stderr, "MoarVM panic: ");
(gdb) bt
#0  MVM_panic (exitCode=1, messageFormat=0xb7cdbf64 "Collectable %p in fromspace accessed") at src/core/exceptions.c:781
#1  0xb7b9c199 in check_reg (tc=0x804c458, reg_base=0x811c620, idx=17) at src/core/interp.c:14
#2  0xb7bcdbae in MVM_interp_run (tc=0x804c458, initial_invoke=0xb7cba4cf <toplevel_initial_invoke>, invoke_data=0x80b0e38) at src/core/interp.c:5264
#3  0xb7cba5fe in MVM_vm_run_file (instance=0x804c008, filename=0xbffff2ac "/home/dogbert/repos/rakudo/perl6.moarvm") at src/moar.c:323
#4  0x08049160 in main (argc=7, argv=0xbffff054) at src/main.c:239
(gdb) f 1
#1  0xb7b9c199 in check_reg (tc=0x804c458, reg_base=0x811c620, idx=17) at src/core/interp.c:14
14	        MVM_ASSERT_NOT_FROMSPACE(tc, reg_base[idx].o);
(gdb) p MVM_dump_backtrace(tc)
   at <unknown>:1  (./blib/Perl6/World.moarvm:variable_components)
 from gen/moar/Perl6-Actions.nqp:2509  (./blib/Perl6/Actions.moarvm:variable)
 from gen/moar/stage2/QRegex.nqp:1675  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!reduce)
 from gen/moar/stage2/QRegex.nqp:1621  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!cursor_pass)
 from src/Perl6/Grammar.nqp:2152  (./blib/Perl6/Grammar.moarvm:variable)
 from src/Perl6/Grammar.nqp:1780  (./blib/Perl6/Grammar.moarvm:term:sym<variable>)
 from gen/moar/stage2/QRegex.nqp:1706  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!protoregex)
 from src/Perl6/Grammar.nqp:3940  (./blib/Perl6/Grammar.moarvm:termish)
 from gen/moar/stage2/NQPHLL.nqp:935  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:EXPR)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:statement)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:semilist)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:circumfix:sym<( )>)
 from gen/moar/stage2/QRegex.nqp:1712  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!protoregex)
 from <unknown>:1  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:circumfix)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:term:sym<circumfix>)
 from gen/moar/stage2/QRegex.nqp:1712  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!protoregex)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:term)
 from src/Perl6/Grammar.nqp:3919  (./blib/Perl6/Grammar.moarvm:termish)
 from gen/moar/stage2/NQPHLL.nqp:935  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:EXPR)
 from src/Perl6/Grammar.nqp:3959  (./blib/Perl6/Grammar.moarvm:EXPR)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:arglist)
 from src/Perl6/Grammar.nqp:3458  (./blib/Perl6/Grammar.moarvm:args)
 from src/Perl6/Grammar.nqp:3405  (./blib/Perl6/Grammar.moarvm:term:sym<name>)
 from gen/moar/stage2/QRegex.nqp:1712  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!protoregex)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:term)
 from src/Perl6/Grammar.nqp:3919  (./blib/Perl6/Grammar.moarvm:termish)
 from gen/moar/stage2/NQPHLL.nqp:935  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:EXPR)
 from src/Perl6/Grammar.nqp:3959  (./blib/Perl6/Grammar.moarvm:EXPR)
 from src/Perl6/Grammar.nqp:1289  (./blib/Perl6/Grammar.moarvm:statement)
 from src/Perl6/Grammar.nqp:1221  (./blib/Perl6/Grammar.moarvm:statementlist)
 from src/Perl6/Grammar.nqp:1392  (./blib/Perl6/Grammar.moarvm:blockoid)
 from src/Perl6/Grammar.nqp:1355  (./blib/Perl6/Grammar.moarvm:pblock)
 from src/Perl6/Grammar.nqp:3871  (./blib/Perl6/Grammar.moarvm:circumfix:sym<{ }>)
 from gen/moar/stage2/QRegex.nqp:1712  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!protoregex)
 from <unknown>:1  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:circumfix)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:term:sym<circumfix>)
 from gen/moar/stage2/QRegex.nqp:1712  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:!protoregex)
 from <unknown>:1  (./blib/Perl6/Grammar.moarvm:term)
 from src/Perl6/Grammar.nqp:3919  (./blib/Perl6/Grammar.moarvm:termish)
 from gen/moar/stage2/NQPHLL.nqp:935  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:EXPR)
 from src/Perl6/Grammar.nqp:3959  (./blib/Perl6/Grammar.moarvm:EXPR)
 from src/Perl6/Grammar.nqp:1289  (./blib/Perl6/Grammar.moarvm:statement)
 from src/Perl6/Grammar.nqp:1221  (./blib/Perl6/Grammar.moarvm:statementlist)
 from gen/moar/stage2/NQPHLL.nqp:1165  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:LANG)
 from src/Perl6/Grammar.nqp:1657  (./blib/Perl6/Grammar.moarvm:FOREIGN_LANG)
 from src/Perl6/Grammar.nqp:1185  (./blib/Perl6/Grammar.moarvm:comp_unit)
 from src/Perl6/Grammar.nqp:492  (./blib/Perl6/Grammar.moarvm:TOP)
 from gen/moar/stage2/QRegex.nqp:2315  (/home/dogbert/repos/rakudo/install/share/nqp/lib/QRegex.moarvm:parse)
 from gen/moar/stage2/NQPHLL.nqp:1895  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:parse)
 from gen/moar/stage2/NQPHLL.nqp:1836  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:run)
 from gen/moar/stage2/NQPHLL.nqp:1846  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:)
 from gen/moar/stage2/NQPHLL.nqp:1824  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:compile)
 from gen/moar/stage2/NQPHLL.nqp:1570  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:eval)
 from gen/moar/stage2/NQPHLL.nqp:1791  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:evalfiles)
 from gen/moar/stage2/NQPHLL.nqp:1685  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:command_eval)
 from src/Perl6/Compiler.nqp:42  (./blib/Perl6/Compiler.moarvm:command_eval)
 from gen/moar/stage2/NQPHLL.nqp:1659  (/home/dogbert/repos/rakudo/install/share/nqp/lib/NQPHLL.moarvm:command_line)
 from gen/moar/main.nqp:47  (/home/dogbert/repos/rakudo/perl6.moarvm:MAIN)
 from gen/moar/main.nqp:38  (/home/dogbert/repos/rakudo/perl6.moarvm:<mainline>)
 from <unknown>:1  (/home/dogbert/repos/rakudo/perl6.moarvm:<main>)
 from <unknown>:1  (/home/dogbert/repos/rakudo/perl6.moarvm:<entry>)
$1 = void