collision.gameObject returning Null

I have an OnCollisionEnter() and I'm trying to add the GameObject that is being collided with to a list of GameObjects. Once the collision happens I get the dreaded NullReferenceException: Object reference not set to an instance of an object.

Here is my code:

Code (CSharp):

1. public class BulletCollision : MonoBehaviour
2. {
3.     [SerializeField]
4.     private GameEvent OnCharacterHit;
5.  
6.     private void OnCollisionEnter(Collision collision)
7.     {
8.         GameObject colObject = collision.gameObject;
9.         Debug.Log(colObject);
10.  
11.         EventListenerFilter filter = new EventListenerFilter();
12.         filter.raisingObjects.Add(colObject); //this is where the exception is thrown
13.  
14.         OnCharacterHit.RaiseFilterByObjects(filter);
15.     }
16. }

 

No the debug.log is not throwing an error. The line that the error is being thrown is on line 12. I’ll paste the actual error when I get home, but what unity is saying is that when I try to pass in the GameObject - that is being stored in “colObject” - it is returning null, thus throwing NullReferenceException.
In fact what is even more surprising is that when i debug.log the object it displays properly. I actually changed that line to log the name of the object and that also popped up correctly.

Edit: I forgot to mention that “filter.raisingObjects” is a list of gameObjects if you couldn’t tell.

 

I’ve got a feeling that this may be the case. I’ll post the EventListenerFilter class on here momentarily, and try debug.logging the list as well.