Segfault happened at: 0x7fc989456f6f <_ZNSsC2ERKSs+79>:	lock addl $0x1,-0x8(%rax)
PC (0x7fc989456f6f) ok
source "$0x1" ok
destination "-0x8(%rax)" (0x7fc975207b98) in non-writable VMA region: 0x7fc974fc6000-0x7fc9752a9000 r-xp /usr/lib/compiz/libunityshell.so