rr.log

[dan@alexandria nqp]$ rr replay
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Reading symbols from /home/dan/.local/share/rr/moar-12/mmap_hardlink_3_moar...
Really redefine built-in command "restart"? (y or n) [answered Y; input not from terminal]
Remote debugging using 127.0.0.1:52174
Reading symbols from /lib64/ld-linux-x86-64.so.2...
(No debugging symbols found in /lib64/ld-linux-x86-64.so.2)
0x00007f4e53311090 in _start () from /lib64/ld-linux-x86-64.so.2
(rr) continue
Continuing.
removing the only existing candidate
[New Thread 3764142.3764143]

Thread 1 received signal SIGSEGV, Segmentation fault.
deopt_frame (tc=0x563893324df0, f=0x7f4e51008048, deopt_idx=77, deopt_offset=616, deopt_target=584) at src/spesh/deopt.c:251
251         if (f->spesh_cand->body.inlines) {
(rr) bt
#0  deopt_frame (tc=0x563893324df0, f=0x7f4e51008048, deopt_idx=77, deopt_offset=616, deopt_target=584) at src/spesh/deopt.c:251
#1  0x00007f4e52c2216b in MVM_spesh_deopt_one (tc=0x563893324df0, deopt_idx=77) at src/spesh/deopt.c:304
#2  0x00007f4e52b05186 in MVM_interp_run (tc=0x563893324df0, initial_invoke=0x7f4e52c9757e <toplevel_initial_invoke>, invoke_data=0x5638933b0db8, outer_runloop=0x0) at src/core/interp.c:5754
#3  0x00007f4e52c976f8 in MVM_vm_run_file (instance=0x5638933242d0, filename=0x7ffc2083f553 "src/vm/moar/stage0/nqp.moarvm") at src/moar.c:504
#4  0x0000563893045c55 in main (argc=12, argv=0x7ffc2083eb18) at src/main.c:305
(rr) p f
$1 = (MVMFrame *) 0x7f4e51008048
(rr) p f->spesh_cand
$2 = (MVMSpeshCandidate *) 0x0
(rr) watch -l f->spesh_cand
Hardware watchpoint 1: -location f->spesh_cand
(rr) reverse-cont
Continuing.

Thread 1 received signal SIGSEGV, Segmentation fault.
deopt_frame (tc=0x563893324df0, f=0x7f4e51008048, deopt_idx=77, deopt_offset=616, deopt_target=584) at src/spesh/deopt.c:251
251         if (f->spesh_cand->body.inlines) {
(rr) reverse-cont
Continuing.

Thread 1 hit Hardware watchpoint 1: -location f->spesh_cand

Old value = (MVMSpeshCandidate *) 0x0
New value = (MVMSpeshCandidate *) 0xefefefefefefefef
0x00007f4e52811fa4 in __memset_avx2_unaligned_erms () from /usr/lib/libc.so.6
(rr) bt
#0  0x00007f4e52811fa4 in __memset_avx2_unaligned_erms () from /usr/lib/libc.so.6
#1  0x00007f4e52b641b4 in MVM_gc_collect (tc=0x563893324df0, what_to_do=0 '\000', gen=0 '\000') at src/gc/collect.c:168
#2  0x00007f4e52b57f1d in run_gc (tc=0x563893324df0, what_to_do=0 '\000') at src/gc/orchestrate.c:443
#3  0x00007f4e52b585f2 in MVM_gc_enter_from_allocator (tc=0x563893324df0) at src/gc/orchestrate.c:598
#4  0x00007f4e52b59066 in MVM_gc_allocate_nursery (tc=0x563893324df0, size=80) at src/gc/allocation.c:37
#5  0x00007f4e52b58e63 in MVM_gc_allocate (tc=0x563893324df0, size=80) at src/gc/allocation.h:18
#6  0x00007f4e52b590ca in MVM_gc_allocate_zeroed (tc=0x563893324df0, size=80) at src/gc/allocation.c:56
#7  0x00007f4e52b5944c in MVM_gc_allocate_object (tc=0x563893324df0, st=0x563893359a18) at src/gc/allocation.c:93
#8  0x00007f4e52b85afa in MVM_repr_alloc_init (tc=0x563893324df0, type=0x5638933458f8) at src/6model/reprconv.c:17
#9  0x00007f4e52c22bbd in MVM_spesh_log_create (tc=0x563893324df0, target_thread=0x563893370530) at src/spesh/log.c:17
#10 0x00007f4e52c22e6b in send_log (tc=0x563893324df0, sl=0x563895d329e0) at src/spesh/log.c:48
#11 0x00007f4e52c22ee7 in commit_entry (tc=0x563893324df0, sl=0x563895d329e0) at src/spesh/log.c:58
#12 0x00007f4e52c236e5 in MVM_spesh_log_deopt (tc=0x563893324df0, sf=0x5638933adbe0, spesh_cand=0x7f4e4c07d2f0) at src/spesh/log.c:160
#13 0x00007f4e52c21f55 in deopt_frame (tc=0x563893324df0, f=0x7f4e51008048, deopt_idx=77, deopt_offset=616, deopt_target=584) at src/spesh/deopt.c:248
#14 0x00007f4e52c2216b in MVM_spesh_deopt_one (tc=0x563893324df0, deopt_idx=77) at src/spesh/deopt.c:304
#15 0x00007f4e52b05186 in MVM_interp_run (tc=0x563893324df0, initial_invoke=0x7f4e52c9757e <toplevel_initial_invoke>, invoke_data=0x5638933b0db8, outer_runloop=0x0) at src/core/interp.c:5754
#16 0x00007f4e52c976f8 in MVM_vm_run_file (instance=0x5638933242d0, filename=0x7ffc2083f553 "src/vm/moar/stage0/nqp.moarvm") at src/moar.c:504
#17 0x0000563893045c55 in main (argc=12, argv=0x7ffc2083eb18) at src/main.c:305
(rr)