Segfault happened at: 0x55d8a6fc6c24:	callq  0x55d8a6fa2b90 <free@plt>
PC (0x55d8a6fc6c24) ok
source "0x55d8a6fa2b90" (0x55d8a6fa2b90) ok
destination "(%rsp)" (0x7ffc2b561000) ok
SP (0x7ffc2b561000) ok
Reason could not be automatically determined.