backtrace from CORE.e.setting.moarvm

a9fcd5a74e8c530b4baa8fdc348b82a71bc0824d / f3054503fd24d3ac67b3afb92af081d6bbd60adf / 73b43e5f997bdbccf4f04c172d21b10be1f703bf this time but have seen it recently on earlier commits.

MVM_SPESH_BLOCKING=1
MVM_SPESH_NODELAY=1

+#define MVM_ARRAY_CONC_DEBUG 1
+#define FSA_SIZE_DEBUG 1
+#define MVM_GC_DEBUG 1
+#define MVM_TEMP_ROOT_DEBUG 1
+#define HASH_DEBUG_ITER 1
+#define MVM_SPESH_CHECK_DU 1

Stage start      :   0.001
AddressSanitizer:DEADLYSIGNAL
=================================================================
==992232==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc 0x7fe8be65a624 bp 0x7fff142b2970 sp 0x7fff142b28c0 T0)
==992232==The signal is caused by a READ memory access.
==992232==Hint: address points to the zero page.
    #0 0x7fe8be65a624 in log_parameter src/spesh/log.c:95
    #1 0x7fe8be65b210 in MVM_spesh_log_entry src/spesh/log.c:130
    #2 0x7fe8be42b0e3 in MVM_frame_dispatch src/core/frame.c:575
    #3 0x7fe8be6038ec in MVM_disp_program_run src/disp/program.c:3583
    #4 0x7fe8be5e90e3 in dispatch_monomorphic src/disp/inline_cache.c:107
    #5 0x7fe8b8fc1548  (<unknown module>)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV src/spesh/log.c:95 in log_parameter
==992232==ABORTING
make: *** [Makefile:1255: blib/CORE.e.setting.moarvm] Error 1
Command exited with non-zero status 2
279.73user 4.08system 4:43.91elapsed 99%CPU (0avgtext+0avgdata 2512040maxresident)k
0inputs+78456outputs (0major+1239233minor)pagefaults 0swaps
2