Sudden SEGV on new-disp

gistfile1.txt

dogbert@dogbert-VirtualBox:~/repos/rakudo$ gdb install/bin/moar core.moar.1000.f4e1afea0509471c9f4e9e8a321dd81a.1018600.1627308985000000000000
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Reading symbols from install/bin/moar...
[New LWP 1018600]
[New LWP 1018601]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/home/dogbert/repos/rakudo/nqp/MoarVM/../../install/bin/moar --execname=/home/d'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f0c536eb941 in MVM_gc_root_add_frame_registers_to_worklist (tc=tc@entry=0x559f1353ae40, worklist=worklist@entry=0x559f173ea160, frame=frame@entry=0x7f0c530e6808) at src/gc/roots.c:472
472	            count    = spesh_cand->body.num_locals;
[Current thread is 1 (Thread 0x7f0c530fe440 (LWP 1018600))]
(gdb) bt
#0  0x00007f0c536eb941 in MVM_gc_root_add_frame_registers_to_worklist (tc=tc@entry=0x559f1353ae40, worklist=worklist@entry=0x559f173ea160, frame=frame@entry=0x7f0c530e6808) at src/gc/roots.c:472
#1  0x00007f0c536ebef3 in MVM_gc_root_add_frame_roots_to_worklist (tc=tc@entry=0x559f1353ae40, worklist=worklist@entry=0x559f173ea160, cur_frame=cur_frame@entry=0x7f0c530e6808) at src/gc/roots.c:452
#2  0x00007f0c536c3ae8 in mark (tc=tc@entry=0x559f1353ae40, from_record=<optimized out>, worklist=worklist@entry=0x559f173ea160, snapshot=snapshot@entry=0x0) at src/core/callstack.c:524
#3  0x00007f0c536c4e09 in MVM_callstack_mark_current_thread (tc=tc@entry=0x559f1353ae40, worklist=worklist@entry=0x559f173ea160, snapshot=snapshot@entry=0x0) at src/core/callstack.c:609
#4  0x00007f0c536e9d30 in MVM_gc_root_add_tc_roots_to_worklist (tc=tc@entry=0x559f1353ae40, worklist=worklist@entry=0x559f173ea160, snapshot=snapshot@entry=0x0) at src/gc/roots.c:173
#5  0x00007f0c536edae2 in MVM_gc_collect (tc=tc@entry=0x559f1353ae40, what_to_do=what_to_do@entry=0 '\000', gen=<optimized out>) at src/gc/collect.c:121
#6  0x00007f0c536e676a in run_gc (tc=tc@entry=0x559f1353ae40, what_to_do=what_to_do@entry=0 '\000') at src/gc/orchestrate.c:443
#7  0x00007f0c536e77cf in MVM_gc_enter_from_allocator (tc=tc@entry=0x559f1353ae40) at src/gc/orchestrate.c:598
#8  0x00007f0c536e7af1 in MVM_gc_allocate_nursery (tc=0x559f1353ae40, size=80) at src/gc/allocation.c:37
#9  0x00007f0c536e7e46 in MVM_gc_allocate_object (tc=0x559f1353ae40, st=<optimized out>) at src/gc/allocation.c:93
#10 0x00007f0c53702de7 in MVM_repr_alloc_init (tc=tc@entry=0x559f1353ae40, type=<optimized out>) at src/6model/reprconv.c:17
#11 0x00007f0c53770087 in MVM_spesh_log_create (tc=tc@entry=0x559f1353ae40, target_thread=<optimized out>) at src/spesh/log.c:17
#12 0x00007f0c53770301 in send_log (tc=0x559f1353ae40, sl=<optimized out>) at src/spesh/log.c:48
#13 0x00007f0c5377038d in commit_entry (tc=tc@entry=0x559f1353ae40, sl=sl@entry=0x559f16894fb0) at src/spesh/log.c:58
#14 0x00007f0c53770793 in MVM_spesh_log_entry (tc=tc@entry=0x559f1353ae40, cid=cid@entry=72437, sf=<optimized out>, args=...) at src/spesh/log.c:121
#15 0x00007f0c536bfb98 in MVM_frame_dispatch (tc=tc@entry=0x559f1353ae40, code=<optimized out>, args=..., spesh_cand=<optimized out>, spesh_cand@entry=-1) at src/core/frame.c:670
#16 0x00007f0c53755f96 in MVM_disp_program_run (tc=tc@entry=0x559f1353ae40, dp=0x559f174433e0, record=record@entry=0x7f0c530e66a0) at src/disp/program.c:2675
#17 0x00007f0c5374f26f in dispatch_polymorphic_flattening (tc=0x559f1353ae40, entry_ptr=0x559f17352978, seen=0x559f13df2040, id=<optimized out>, callsite=<optimized out>, arg_indices=<optimized out>, 
    source=0x559f1361ae00, sf=<optimized out>, bytecode_offset=84) at src/disp/inline_cache.c:219
#18 0x00007f0c5369de1b in MVM_interp_run (tc=0x559f1353ae40, initial_invoke=0x559f173ea160, invoke_data=0x559f173ea160, outer_runloop=0x1500001) at src/core/interp.c:5538
#19 0x0000559f12b267f0 in main (argc=7, argv=0x7ffda8777928) at src/main.c:305
(gdb) info threads
  Id   Target Id                           Frame 
* 1    Thread 0x7f0c530fe440 (LWP 1018600) 0x00007f0c536eb941 in MVM_gc_root_add_frame_registers_to_worklist (tc=tc@entry=0x559f1353ae40, worklist=worklist@entry=0x559f173ea160, frame=frame@entry=0x7f0c530e6808)
    at src/gc/roots.c:472
  2    Thread 0x7f0c530ba700 (LWP 1018601) futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559f1353a420) at ../sysdeps/nptl/futex-internal.h:183