UnhandledException : Removing object that is not being tracked. at Finalize()

[jack81722]

I am developing a power server that will create multiple rooms and multiple physic worlds. My simple game object wrapping BulletSharp.CollisionObject will be added or removed at the end of frame like below code :

public void Unregister(SimpleGameObject go)
{    
    if (world.CollisionObjectArray.Contains(go.collision))
    {
        world.RemoveCollisionObject(go.collision);
        go.collision.Dispose();
    }
}

Sometime it will throw an exception such as :

Unhandled Exception: System.Exception: Removing object that is not being tracked. Object info: BulletSharp.CollisionObject
   at BulletSharp.BulletObjectTracker.RemoveRef(BulletDisposableObject obj)
   at BulletSharp.BulletObjectTracker.Remove(BulletDisposableObject obj)
   at BulletSharp.BulletDisposableObject.Finalize()

It looks like that physic world lost dependence of collision object while GC calling Finalize() method. What may I do to solve this problem? It also will happen when disposing ray result callback after using RayTest() method :

public bool RaycastAll(Vector3 origin, Vector3 direct, out List<Vector3> hitPoints, out List<CollisionObject> hitObjs, int mask = -1)
{
    Vector3 from = origin, to = origin + direct;
    AllHitsRayResultCallback callback = new AllHitsRayResultCallback(from, to);
    callback.CollisionFilterMask = mask;
    world.RayTest(from, to, callback);
    hitPoints = callback.HitPointWorld;
    hitObjs = callback.CollisionObjects;
    return callback.HasHit;
}

[AndresTraks]

Is it a multithreaded application?

I added synchronization here: AndresTraks/BulletSharpPInvoke#54
and I assume you're using the P/Invoke version of BulletSharp.

[jack81722]

Thanks for reply.

Yes, it's a multithreaded application.
I used the newest version of BulletSharpPInvoke and then no error anymore.