Overlapsphere crashing my game?

My Unity keeps freezing when I run it while using this code, Am i doing something wrong?

  using UnityEngine;
     using System.Collections;
     
     public class BasicAIMovement : MonoBehaviour {
         NavMeshAgent nma;
         public GameObject point;
     
         // Use this for initialization
         void Start () {
             nma = gameObject.GetComponent<NavMeshAgent>();
             Search(gameObject.transform.position,20);
         }
         
         // Update is called once per frame
         void Update () {
             if(point != null){
             nma.destination = point.transform.position;
             }
         }
     
         void Search(Vector3 center,float radius){
             Collider[] hitColliders = Physics.OverlapSphere(center, radius);
             int i = 0;
             while (i < hitColliders.Length) {
                 if(hitColliders[i].tag == "Point"){
                 print(hitColliders[i].name);
                 i++;
                 }
             }
         }
     }