gdb> bt
#0  CreateNewFont (sprite=0x0, font=0x63e960, xlen=0x10, ylen=0x10, c32len=0x1) at sprite.c:375
#1  0x000000000041b312 in load_bitmaps () at main.c:835
#2  0x000000000041cc6f in main (argc=<value optimized out>, argv=0x42fc32) at main.c:1296