Unity 4.6.1f1 Freeze after Physics2D.OverlapCircleAll()

Hi. When I use Physics2D.OverlapCircleAll() script in my game, when it has to be done all program get freeze and i must restart it. I found that hitColliders.gameObject.GetComponent<HealthScript>() is freezing program but i dont know why. It`s works few time and after this I always get freeze. Box Collider is in the same object where is HealthScript script. I shoud write this in another way?

Code (CSharp):

1.     void ExplodingSpearSkill() {
2.         if(gameObject.transform.position.y < Screen.height*0.1f) {
3.             ExplosionDamage(gameObject.transform.position, PlayerActiveSkills.explodingSpearStats[0]);
4.             Destroy(gameObject);
5.         }
6.     }
7.  
8.     void ExplosionDamage(Vector3 center, float radius) {
9.         Collider2D[] hitColliders = Physics2D.OverlapCircleAll(center, radius);
10.         //Collider2D[] hitColliders = Physics2D.OverlapCircleNonAlloc(center, radius, hitColliders);
11.         int i = 0;
12.  
13.         Debug.Log("BUM : " + radius + " " + hitColliders.Length);
14.         while (i < hitColliders.Length) {
15.             if(hitColliders[i].gameObject.GetComponent<HealthScript>() != null) {
16.                 Debug.Log("BUUUUUUM");
17.                 hitColliders[i].GetComponent<HealthScript>().HP -= 100;//gameObject.GetComponent<ShotScript>().damage*PlayerActiveSkills.explodingSpearStats[1];
18.                 i++;
19.             }
20.         }
21.     }

SOLUTION.
Sorry for this. I forget i have in scene unit which attack monsters by explosion and it collider was in array to. But my attacking unit dosent have healthScript so thats all problem.

 

Not the problem - you should move i++ from inside the if, otherwise it will just keep retrying forever, and unity will crash.

Another solution would be to use
while(i++ < hitColliders.Length) {