.
Thread 1 (process 6274):
#0  0xb77c5b46 in glLightfv () from /usr/lib/libGL.so.1
#1  0x080b6bbe in ?? ()
#2  0x08100691 in ?? ()
#3  0x080548db in ?? ()
#4  0xb74d5685 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#5  0x080547b1 in ?? ()