Error: segmentation violation
   rax 0000000000000000, rbx 00000000013dc140, rcx ffffffffffffffff
   rdx 00000000000087d3, rsp 00007ffcd9f08eb8, rbp 00007ffcd9f08ee0
   rsi 000000000000000b, rdi 00000000000087d3, r8  00007f0842645740
   r9  0000000000000000, r10 00007ffcd9f08920, r11 0000000000000206
   r12 00007ffcd9f093e0, r13 000000000238f520, r14 00000000013c5630
   r15 00007f0831a7e5b0
  --- traceback not available