Segfault happened at: 0x7efc6eb38437 <XGetModifierMapping+39>:	callq  *(%rax)
PC (0x7efc6eb38437) ok
source "*(%rax)" ok
destination "(%rsp)" (0x7fff2ca4d2d0) ok
SP (0x7fff2ca4d2d0) ok
Reason could not be automatically determined.