Segfault happened at: 0x7f80f30b1511 <prefill_from_oparray+563>:	push   %rax
PC (0x7f80f30b1511) ok
source "%rax" ok
destination "(%rsp)" (0x7fff811a5d48) ok
SP (0x7fff811a5d48) ok
Reason could not be automatically determined.