Physics Crashes - ConvexMeshRuntime::ProjectHull

Hi, we're getting crashes in Unity Code that we can't quite debug where they're coming from.

We get it more frequently on Mac than on PC (almost every 5-10 miniutes on Mac).

It occurs both in the player and in the editor and we get the following callstack:

Receiving unhandled NULL exception

ConvexMeshRuntime:rojectHull(NPhaseContext&, float&, float&, IceMaths:oint const&, IceMaths::Matrix4x4 const&) const
non-virtual thunk to ConvexMeshRuntime:rojectHull(NPhaseContext&, float&, float&, IceMaths:oint const&, IceMaths::Matrix4x4 const&) const
TestSepAxis(NPhaseContext&, IceMaths:oint const&, ConvexMeshInterface const&, ConvexMeshInterface const&, IceMaths::Matrix4x4 const&, IceMaths::Matrix4x4 const&, float*)
contactHullHull(Shape const*, Shape const*, ConvexMeshInterface const*, ConvexMeshInterface const*, ClosestPolygonMap const*, ClosestPolygonMap const*, IceMaths::Matrix4x4 const&, IceMaths::Matrix4x4 const&, NPhaseContext&)
triggerConvexConvex(Shape const*, Shape const*, TriggerCache&, NPhaseContext&)
CollisionMap::findTriggerContacts(Shape const*, Shape const*, TriggerInteraction&, NPhaseContext&) const
NPhaseCore::findTriggerContacts(TriggerInteraction*, NPhaseContext&)
NPhaseCore::narrowPhase()
Scene::runSubstep()
Scene::simulate(unsigned int, unsigned int)
NpScene::executeScene()
PhysicsManager::FixedUpdate()
PhysicsManager::InitializeClass():hysicsFixedUpdate::Forward()

Any help would be greatly appreciated,
Chris

 

This seems to be the same as:
http://forum.unity3d.com/threads/convex-mesh-crash.274873/

We're also seeing an unhandled NULL exception in:
HullLib::calchullgen(HullLib::float3*, int, int).