.
Thread 1 (process 20072):
#0  0xb7f96258 in SDL_Flip () from /usr/lib/libSDL-1.2.so.0
#1  0x08054fb4 in ?? ()
#2  0x0804963b in ?? ()
#3  0xb7d9d685 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#4  0x080492b1 in ?? ()