Unity Stops Running

Questions & Answers
1

I write this line of code in order to put a limit to spawned objects in the scene but when “powerUpsOnPlatform” hit the maximum value unity stops responding.

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

public class PowerUpSpawner : MonoBehaviour
{
    [SerializeField] private GameObject[] powerUps;
     private GameHandler gameHandler;
    private float xBorder = 11.5f;
    private float zBorder = 10;
    private PlayerController playerController;
    public int powerUpsOnPlatform;
    void Start()
    {
        playerController = GameObject.Find("Player").GetComponent<PlayerController>();
        gameHandler = GameObject.Find("GameHandler").GetComponent<GameHandler>();
        StartCoroutine(PowerSpawner());
    }

    // Update is called once per frame
    void Update()
    {
       /* if (powerUpsOnPlatform < 3)
        {
            StartCoroutine(PowerSpawner());
        }*/
    }

    IEnumerator PowerSpawner()
    {
        while (!gameHandler.gameOver()) 
        {
            if (powerUpsOnPlatform < 3) 
            {
                float spawnTime = Random.Range(5, 10);
                powerUpsOnPlatform++;
                yield return (new WaitForSeconds(spawnTime));
                Instantiate(powerUps[0], GenerateRandomSpawnPosition(), Quaternion.identity);
            }
            
        }
    }

    private Vector3 GenerateRandomSpawnPosition()
    {
        float xBorders;
        float zBorders;
        xBorders = Random.Range(-xBorder, xBorder);
        zBorders = Random.Range(-zBorder, zBorder);
        Vector3 spawnPos = new Vector3(xBorders, 0, zBorders);
        return spawnPos;
    }
    public void PowerUpDecreaser()
    {
        powerUpsOnPlatform--;
    }
}
2

Oh guys I found it,
It’s because I did not return anything if the “if statement is not correct.” and that leads to game crush.But it is still wierd that Unity did not warn me about that.