.
Thread 1 (process 5579):
#0  0xb7f4394f in ?? () from /usr/lib/libGL.so.1
#1  0x0804d340 in ?? ()
#2  0xb7f79660 in ?? () from /usr/lib/libGL.so.1
#3  0x0804d340 in ?? ()
#4  0xb7f421a6 in ?? () from /usr/lib/libGL.so.1
#5  0x0804d340 in ?? ()
#6  0x0804d340 in ?? ()
#7  0xb7dcda4c in ?? () from /usr/lib/libX11.so.6
#8  0x080542c0 in ?? ()
#9  0xb7cfe996 in XCloseDisplay () from /usr/lib/libX11.so.6
#10 0x08049811 in ?? ()
#11 0x0804d340 in ?? ()
#12 0x00000000 in ?? ()