При return null выдает: ArgumentOutOfRangeException: Index was out of range

using System.Collections.Generic;
using UnityEngine;
 
public class Pool : MonoBehaviour
{
    public static Pool SharedInstance;
    public List<GameObject> pooledBombs;
    public List<GameObject> pooledCoins;
    public GameObject objectToPoolCoin;
    public GameObject objectToPoolBomb;
    public int countToPool;
 
    private void Awake()
    {
        SharedInstance = this;
    }
 
    void Start()
    {
        pooledBombs = new List<GameObject>();
        pooledCoins = new List<GameObject>();
 
        GameObject tmpC;
        GameObject tmpB;
 
        for (int i = 0; i < countToPool; i++)
        {
            tmpC = Instantiate(objectToPoolCoin);
            tmpB = Instantiate(objectToPoolBomb);
 
            tmpC.SetActive(false);
            tmpB.SetActive(false);
 
            pooledBombs.Add(tmpB);
            pooledCoins.Add(tmpC);
        }
    }
 
    public GameObject GetPooledCoin()
    {
        for (int i = 0; i < countToPool; i++)
        {
            if (!pooledCoins[i].activeInHierarchy)
            {
                return pooledCoins[i];
            }
        }
        return null;
    }
 
    public GameObject GetPooledBomb()
    {
        for (int i = 0; i < countToPool; i++)
        {
            if (!pooledBombs[i].activeInHierarchy)
            {
                return pooledBombs[i];
            }
        }
        return null;
    }
 
}

GameObject currCoin = Pool.SharedInstance.GetPooledBomb();

if(Pool.SharedInstance.pooledBombs != null){
GameObject currCoin = Pool.SharedInstance.GetPooledBomb();
}

if (pool.pooledBombs.Count > 0)