Stacktrace:

  at (wrapper managed-to-native) Ode.NET.d.SpaceCollide2 (intptr,intptr,intptr,Ode.NET.d/NearCallback)
<0x00004>
  at (wrapper managed-to-native) Ode.NET.d.SpaceCollide2 (intptr,intptr,intptr,Ode.NET.d/NearCallback)
<0xffffffff>
  at OpenSim.Region.Physics.OdePlugin.OdeScene.collision_optimized (single) <0x000e3>
  at OpenSim.Region.Physics.OdePlugin.OdeScene.Simulate (single) <0x00215>
  at OpenSim.Region.Environment.Scenes.InnerScene.UpdatePhysics (double) <0x00031>
  at OpenSim.Region.Environment.Scenes.Scene.Update () <0x001ab>
  at OpenSim.Region.Environment.Scenes.Scene.Heartbeat (object,System.EventArgs) <0x0000b>
  at System.Timers.Timer.Callback (object) <0x002a6>
  at (wrapper delegate-invoke) System.MulticastDelegate.invoke_void_object (object) <0xffffffff>
  at (wrapper runtime-invoke) System.Threading.WaitCallback.runtime_invoke_void_object (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        mono [0x81ab4d7]
        mono [0x818e8f9]
        /lib/libpthread.so.0 [0xb7e68150]
        ./libode.so(_ZN11dxHashSpace10cleanGeomsEv+0x98) [0xb40aefa8]
        ./libode.so(_ZN11dxHashSpace8collide2EPvP6dxGeomPFvS0_S2_S2_E+0x38) [0xb40af638]
        ./libode.so(dSpaceCollide2+0x12b) [0xb40b003b]
        [0xac314487]
        [0xb4080e94]
        [0xb40808e6]
        [0xb4080212]
        [0xb407f154]
        [0xb407efa4]
        [0xb6aeb15f]
        [0xb6aeae94]
        [0xb6aeadee]
        mono [0x818e75c]
        mono(mono_runtime_invoke+0x29) [0x80b8aa0]
        mono(mono_runtime_invoke_array+0x50b) [0x80ba4be]
        mono [0x80bc65f]
        mono [0x80f5cca]
        mono [0x80f6b28]
        mono [0x80efc24]
        mono [0x8149305]
        mono [0x8162ee8]
        /lib/libpthread.so.0 [0xb7e602d3]
        /lib/libc.so.6(clone+0x5e) [0xb7dc054e]