Segfault happened at: 0x7f25e0cbb2f8 <_ZN6Xapian6Weight8Internal16accumulate_statsERKNS_8Database8InternalERKNS_4RSetE+104>:	callq  *0x40(%rax)
PC (0x7f25e0cbb2f8) ok
source "*0x40(%rax)" ok
destination "(%rsp)" (0x7fff49da7b80) ok
SP (0x7fff49da7b80) ok
Reason could not be automatically determined.