Error: segmentation violation
   rax 0000000000000000, rbx 00000000013dc140, rcx ffffffffffffffff
   rdx 000000000000ac9f, rsp 00007ffd7d23cd68, rbp 00007ffd7d23cd90
   rsi 000000000000000b, rdi 000000000000ac9f, r8  00007f3ab83e9740
   r9  0000000000000000, r10 00007ffd7d23c7e0, r11 0000000000000202
   r12 00007ffd7d23d290, r13 000000000238f520, r14 00000000013c5630
   r15 00007f3aa7729570
  --- traceback not available