/var/log/messages:

kernel: xa[279324]: segfault at 0 ip 0000000000000000 sp 00007ffdc094a500 error 14 in xa[400000+2000] likely on CPU 3 (core 0, socket 6)
kernel: Code: Unable to access opcode bytes at 0xfffffode: Unable to access opcode bytes at 0xffffffffffffffd6.