Breakpoint 1, vm_vec_copy_normalize (dest=0xbffff034, src=0xbffff034) at math/vecmat.cpp:770 770 "Trace out of vecmat.cpp and find offending code.\n"); (gdb) bt #0 vm_vec_copy_normalize (dest=0xbffff034, src=0xbffff034) at math/vecmat.cpp:770 #1 0x0810bde7 in vm_vec_normalize (v=0xbffff034) at math/vecmat.cpp:792 #2 0x08211233 in g3_draw_rotated_bitmap_3d (pnt=0xbffff3fc, angle=4.81710911, rad=25.1660385, tmap_flags=8193, depth=0) at render/3ddraw.cpp:1243 #3 0x082114dd in g3_draw_rotated_bitmap (pnt=0xbffff3fc, angle=4.81710911, rad=17.7950764, tmap_flags=8193, depth=0) at render/3ddraw.cpp:1289 #4 0x080a30d4 in fireball_render (obj=0x9cf2140) at fireball/fireballs.cpp:706 #5 0x081e1649 in obj_render (obj=0x9cf2140) at object/object.cpp:2099 #6 0x081e22f9 in obj_render_all (render_function=0x81e15b4 , draw_viewer_last=0xbffff507) at object/objectsort.cpp:406 #7 0x08053f95 in game_render_frame (eye_pos=0xbffff590, eye_orient=0xbffff56c) at freespace2/freespace.cpp:4850 #8 0x08054de3 in game_frame (paused=0) at freespace2/freespace.cpp:5647 #9 0x080556dd in game_do_frame () at freespace2/freespace.cpp:6098 #10 0x080577b8 in game_do_state (state=19) at freespace2/freespace.cpp:8032 #11 0x080a7cf9 in gameseq_process_events () at gamesequence/gamesequence.cpp:657 #12 0x0805823a in WinMainSub (argc=4, argv=0xbffff7d4) at freespace2/freespace.cpp:8568 #13 0x0805826c in main (argc=4, argv=0xbffff7d4) at freespace2/freespace.cpp:8630 #14 0x402f8c6f in __libc_start_main () from /lib/libc.so.6 #0 vm_vec_copy_normalize (dest=0xbffff250, src=0xbffff250) at math/vecmat.cpp:770 #1 0x0810bde7 in vm_vec_normalize (v=0xbffff250) at math/vecmat.cpp:792 #2 0x0810d4b4 in vm_vec_dot_to_point (dir=0xbffff2f0, p1=0x9c9d244, p2=0xbffff2cc) at math/vecmat.cpp:1672 #3 0x0806147d in ai_path () at ai/aicode.cpp:4692 #4 0x080719f3 in ai_bay_emerge () at ai/aicode.cpp:12982 #5 0x080721fc in ai_execute_behavior (aip=0x83a31e0) at ai/aicode.cpp:13320 #6 0x08073fff in ai_frame (objnum=64) at ai/aicode.cpp:14429 #7 0x08074203 in ai_process (obj=0x9c9d220, ai_index=13, frametime=0.0390014648) at ai/aicode.cpp:14508 #8 0x082245a9 in ship_process_post (obj=0x9c9d220, frametime=0.0390014648) at ship/ship.cpp:6698 #9 0x081e0f04 in obj_move_all_post (objp=0x9c9d220, frametime=0.0390014648) at object/object.cpp:1803 #10 0x081e152d in obj_move_all (frametime=0.0390014648) at object/object.cpp:2015 #11 0x0805460d in game_simulation_frame () at freespace2/freespace.cpp:5218 #12 0x08054d38 in game_frame (paused=0) at freespace2/freespace.cpp:5624 #13 0x080556dd in game_do_frame () at freespace2/freespace.cpp:6098 #14 0x080577b8 in game_do_state (state=2) at freespace2/freespace.cpp:8032 #15 0x080a7cf9 in gameseq_process_events () at gamesequence/gamesequence.cpp:657 #16 0x0805823a in WinMainSub (argc=4, argv=0xbffff7d4) at freespace2/freespace.cpp:8568 #17 0x0805826c in main (argc=4, argv=0xbffff7d4) at freespace2/freespace.cpp:8630 #18 0x402f8c6f in __libc_start_main () from /lib/libc.so.6