Why does this code cause Unity 2018.2.9f1 (64-bit) to stop responding on play?

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class FoodSpawner : MonoBehaviour {

 public GameObject[] foodArr;
 public int foodDelay = 10;
 public Transform spawnArea;    

 private int foodCount;
 private GameObject[] foodCountArr;
 private GameObject food;
 private Vector3 spawnLocation;
 private Vector3 spawnPosition;
 private Quaternion spawnRotation;

     void Start()
     {
     spawnLocation = spawnArea.transform.position;
     StartCoroutine (FoodSpawn());
     }
     
     void Update()
     {
     foodCountArr = GameObject.FindGameObjectsWithTag("Food");
     foodCount = foodCountArr.Length;
     

 }
 IEnumerator FoodSpawn()
 {while (true)
     {
         for (int i = 0; i < foodCount; i++)
         {
             food = foodArr[Random.Range(0, foodArr.Length)];
             spawnPosition = new Vector3
                 ((spawnArea.transform.position.x + Random.Range(-150, 150)),
                 24.925f,
                 (spawnArea.transform.position.z + Random.Range(-150, 150)));
             spawnRotation = Quaternion.identity;
             Instantiate(food, spawnPosition, spawnRotation);

             yield return new WaitForSeconds(foodDelay);

         }
     }
     
 }

}