Unity crash on collision

Hello, My unity keeps crashing when the shuriken prefab collides with the box collider 2D prefab on my background.

It happened after I implented this while loop which I'm not confident on, so any help is appreciated..

 private Rigidbody2D rb2d;
 public float speed;
 public GameObject Shuriken;
 private int livess = 3; 
 void Start ()
 {
     rb2d = GetComponent<Rigidbody2D> ();
 }
 void Update () 
 {
     rb2d.AddForce(Vector2.left*speed);
 }
 void SpawnShuriken()
 {
     Vector3 RandomSpawn = new Vector3 (Random.Range (10.07F, 10.07F), Random.Range (-4.07F, 4.07F),1F);
     Instantiate (Shuriken, RandomSpawn, Quaternion.identity);
 }
 void OnTriggerEnter2D(Collider2D other)
 {
     while (livess>0)
     {    
         if (other.gameObject.CompareTag ("Player")) 
         {
             if (livess <= 0) 
             {
                 Destroy (GameObject.FindWithTag ("Player"));            
             } 
             else 
             {
                 livess = livess-1;
                 Debug.LogError (livess);
                 break;
             }
         }
     }
 }
 void OnTriggerExit(Collider2D other)
 {
     if(other.gameObject.CompareTag ("Background"))
     {
         SpawnShuriken ();
         Destroy (Shuriken);
     }
 }

}