AccessViolationException while BulletSharp.DynamicsWorld.StepSimulation

[Sphaerichthys]

I have a random reproduce of the issue. What I do: 1.Create DynamicWorld:

            var collisionConf = new DefaultCollisionConfiguration();
            var dispatcher = new CollisionDispatcher(collisionConf);
            var broadphase = new AxisSweep3(new Vector3(-200, -200, -200), new Vector3(200, 200, 200));
            var solver = new SequentialImpulseConstraintSolver();

            var world = new DiscreteDynamicsWorld(dispatcher, broadphase, solver, collisionConf);

            broadphase.OverlappingPairCache.SetInternalGhostPairCallback(new GhostPairCallback());

2.Create some plane or some map and add it to the world. 3.Add KinematicCharacterMovementController to the world:

                    var identity = Matrix.Identity;

                    var ghostObject = new PairCachingGhostObject
                    {
                        CollisionShape = capsule,
                        CollisionFlags = CollisionFlags.CharacterObject,
                        WorldTransform = identity,
                        ActivationState = ActivationState.DisableDeactivation
                    };
                    worldManager.AddCollisionObject(ghostObject, CollisionFilterGroups.CharacterFilter, CollisionFilterGroups.StaticFilter | CollisionFilterGroups.DefaultFilter);

                    var character = new KinematicCharacterController(ghostObject, capsule, GameServerSettings.CharacterStepHight);
                    worldManager.AddAction(character);
                    return new KinematicCharacterMovementController(character);

When I add several character controllers to the world I get

System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at BulletSharp.DynamicsWorld.StepSimulation(Single timeStep)

randomly from time to time with no further details.

[AndresTraks]

I did find an issue in KinematicCharacterController where a wrong block of memory was being freed. It is fixed here: https://github.com/AndresTraks/BulletSharp/commit/6124d85c4b9c89248a295f4a744a541f7338ce1a

[Sphaerichthys]

That helped, thank you.