Program received signal SIGSEGV, Segmentation fault.
0xf7c0c191 in xcb_writev () from /usr/lib32/libxcb.so.1
(gdb) bt
#0  0xf7c0c191 in xcb_writev () from /usr/lib32/libxcb.so.1
#1  0xf7e1d3ce in _XSend () from /usr/lib32/libX11.so.6
#2  0xf7e1d964 in _XReply () from /usr/lib32/libX11.so.6
#3  0xf7e035c0 in XGetWindowProperty () from /usr/lib32/libX11.so.6
#4  0x083c3f51 in ?? ()
#5  0x083c436d in ?? ()
#6  0x0828217e in ?? ()
#7  0x0827563e in ?? ()
#8  0x083e223b in ?? ()
#9  0xf7c46536 in __libc_start_main () from /usr/lib32/libc.so.6
#10 0x0804e623 in ?? ()