Sorry for not getting back to you earlier. Attached is the backtrace on sparc64.
// Alex This GDB was configured as "sparc64-unknown-openbsd4.4"... (gdb) start Breakpoint 1 at 0x12a4b8: file OsFreeDesktop.cpp, line 57. Starting program: /usr/local/bin/numptyphysics main (argc=1, argv=0xffffffffffff7108) at OsFreeDesktop.cpp:57 57 npmain(argc,argv); (gdb) bt full #0 main (argc=1, argv=0xffffffffffff7108) at OsFreeDesktop.cpp:57 No locals. (gdb) c Continuing. Program received signal SIGBUS, Bus error. 0x000000000014091c in b2PairManager (this=0x4d4f4004) at Box2D/Source/Collision/b2PairManager.cpp:78 78 m_pairs[i].userData = NULL; (gdb) bt full #0 0x000000000014091c in b2PairManager (this=0x4d4f4004) at Box2D/Source/Collision/b2PairManager.cpp:78 i = 0 #1 0x000000000012f32c in b2BroadPhase (this=0x4d4f4004, worldaa...@0xffffffffffff6a50, callback=0x4075f2a8) at Box2D/Source/Collision/b2BroadPhase.cpp:68 d = {x = 0, y = 4.98500718e-39} #2 0x00000000001380e0 in b2World (this=0x40746000, worldaa...@0xffffffffffff6a50, gravi...@0xffffffffffff6a40, doSleep=true) at Box2D/Source/Dynamics/b2World.cpp:59 mem = (void *) 0x4d4f4004 bd = {massData = {mass = -nan(0x7fffff), center = { x = -nan(0x7f6121), y = -3.11687118e-15}, I = 1.43043748e-38}, userData = 0xffffffffffff6121, position = {x = -3.11687118e-15, y = 1.43043748e-38}, angle = 0, linearDamping = 0, angularDamping = 0, allowSleep = 80, isSleeping = false, fixedRotation = 197, isBullet = false} #3 0x0000000000110270 in Scene (this=0xffffffffffff6d00, noWorld=false) at Game.cpp:534 worldAABB = {lowerBound = {x = -100, y = -100}, upperBound = { x = 100, y = 100}} gravity = {x = 0, y = 10} doSleep = true #4 0x0000000000110a20 in Game (this=0xffffffffffff6cd0, width=800, height=480) at Game.cpp:1018 No locals. #5 0x000000000010f4f8 in npmain (argc=1, argv=0xffffffffffff7108) at Game.cpp:1550 game = {<GameControl> = {_vptr.GameControl = 0x25f2c8, m_quit = false, m_edit = false, m_refresh = true, m_fade = false, m_colour = 2, m_strokeFixed = false, m_strokeSleep = false, m_strokeDecor = false, m_levels = {m_levels = {m_data = 0x49854050, m_size = 0, m_capacity = 0}}, m_level = 0}, m_scene = {<b2ContactListener> = {_vptr.b2ContactListener = 0x25f310}, m_world = 0x0, m_strokes = {m_data = 0x49854110, m_size = 0, m_capacity = 0}, m_title = {static npos = 0, _M_dataplus = {<std::allocator<char>> = {<No data fields>}, _M_p = 0x4e618ed8 ""}, static _S_empty_rep_storage = {0, 0, 3, 0}}, m_author = {static npos = 0, _M_dataplus = {<std::allocator<char>> = {<No data fields>}, _M_p = 0x4e618ed8 ""}, static _S_empty_rep_storage = {0, 0, 3, 0}}, m_bg = {static npos = 0, _M_dataplus = {<std::allocator<char>> = {<No data fields>}, _M_p = 0x4e618ed8 ""}, static _S_empty_rep_storage = {0, 0, 3, 0}}, m_bgImage = 0x0, static g_bgImage = 0x0, m_protect = 0}, m_createStroke = 0xffff00000000, m_moveStroke = 0xffffffffffff6d68, m_overlays = {m_data = 0xa76098204f3a8383, m_size = 0, m_capacity = 0}, m_window = {<Canvas> = {_vptr.Canvas = 0x0, m_state = 0xffffffff, m_bgColour = 0, m_bgImage = 0x105398, m_clip = {tl = {x = 0, y = 1172733952}, br = {x = 0, y = 4631104}}}, <No data fields>}, m_pauseOverlay = 0x0, m_editOverlay = 0xffffffffffff6e28, m_recorder = { m_running = false, m_log = {<Array<DemoEntry>> = {m_data = 0x4883c158, m_size = 0, m_capacity = 1342227712}, <No data fields>}, m_lastTick = 0, m_lastTickTime = 1216594264}, m_player = { m_playing = false, m_log = 0x9a, m_index = 0, m_lastTick = 0, m_lastTickTime = 0}, m_os = 0x0} thumbnailMode = false files = {m_data = 0x49854030, m_size = 0, m_capacity = 0} rotate = false width = 800 height = 480 #6 0x000000000012a4d0 in main (argc=1, argv=0xffffffffffff7108) at OsFreeDesktop.cpp:57 No locals. (gdb)