Test failure

gistfile1.txt

Starting program: /home/dogbert/repos/rakudo/install/bin/moar --execname=./perl6-gdb-m --libpath=. --libpath=blib --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib /home/dogbert/repos/rakudo/perl6.moarvm --nqp-lib=blib t/spec/S15-nfg/concat-stable.t
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff624a700 (LWP 24568)]
1..21
ok 1 - \r\n newline has same number of .chars as \n in Hangul
ok 2 - Hangul text \r\n newlines roundtrips NFD to NFC
ok 3 - Hangul text \n newlines roundtrips NFD to NFC

Thread 1 "moar" hit Breakpoint 1, MVM_panic (exitCode=1, messageFormat=0x7ffff7723688 "Collectable %p in fromspace accessed") at src/core/exceptions.c:821
821	MVM_NO_RETURN void MVM_panic(MVMint32 exitCode, const char *messageFormat, ...) {
(gdb) bt
#0  MVM_panic (exitCode=1, messageFormat=0x7ffff7723688 "Collectable %p in fromspace accessed") at src/core/exceptions.c:821
#1  0x00007ffff75be870 in push (tc=0x604a20, st=0x66cfb0, root=0x7ffff2a777a0, data=0x7ffff2a777b8, value=..., kind=8) at src/6model/reprs/VMArray.c:492
#2  0x00007ffff75b5e21 in MVM_repr_push_o (tc=0x604a20, obj=0x7ffff2a777a0, pushee=0x7ffff62a39c8) at src/6model/reprconv.c:379
#3  0x00007ffff7655fcf in evaluate_guards (tc=0x604a20, gs=0x2e409e0, callsite=0x7ffff7cc91a0 <two_args_callsite>, guard_offset=0x7fffffffc48a) at src/spesh/plugin.c:87
#4  0x00007ffff76560eb in resolve_using_guards (tc=0x604a20, cur_position=282, callsite=0x7ffff7cc91a0 <two_args_callsite>, guard_offset=0x7fffffffc48a, sf=0x1199a00) at src/spesh/plugin.c:115
#5  0x00007ffff7657878 in MVM_spesh_plugin_resolve (tc=0x604a20, name=0x19ef3c0, result=0xc46040, op_addr=0x7ffff49ad1cc "\034\003\017", next_addr=0x7ffff49ad1d4 "\207\001\v", 
    callsite=0x7ffff7cc91a0 <two_args_callsite>) at src/spesh/plugin.c:408
#6  0x00007ffff7544cd9 in MVM_interp_run (tc=0x604a20, initial_invoke=0x7ffff76baf17 <toplevel_initial_invoke>, invoke_data=0x6901d0) at src/core/interp.c:5323
#7  0x00007ffff76bb07c in MVM_vm_run_file (instance=0x604010, filename=0x7fffffffe2bf "/home/dogbert/repos/rakudo/perl6.moarvm") at src/moar.c:412
#8  0x00000000004016e7 in main (argc=10, argv=0x7fffffffde18) at src/main.c:299
(gdb) info threads
  Id   Target Id         Frame 
* 1    Thread 0x7ffff7fdb700 (LWP 24567) "moar" MVM_panic (exitCode=1, messageFormat=0x7ffff7723688 "Collectable %p in fromspace accessed") at src/core/exceptions.c:821
  2    Thread 0x7ffff624a700 (LWP 24568) "moar" pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185