missing prefab 检查

问题：unity手动删除预制件后，对嵌套了被删除预制件的预制件进行打包Assetbundle，unity无报错Crash。

为了解决crash检查代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
 
 
public class MissingPrefabDetector
{
    [MenuItem("Util/Find Missing Prefab")]
    static void Init()
    {
        string[] allPrefabs = GetAllPrefabs();
 
        int count = 0;
        EditorUtility.DisplayProgressBar("Processing...", "Begin Job", 0);
 
        foreach (string prefab in allPrefabs)
        {
            AssetDatabase.ImportAsset(prefab);
            UnityEngine.Object o = AssetDatabase.LoadMainAssetAtPath(prefab);
 
            if (o == null)
            {
                Debug.Log("prefab " + prefab + " null?");
                continue;
            }
 
            GameObject go;
            try
            {
                go = o as GameObject;
                EditorUtility.DisplayProgressBar("Processing...", go.name, ++count / (float)allPrefabs.Length);
                FindMissingPrefabInGO(go, prefab, true);
            }
            catch
            {
                Debug.Log("For some reason, prefab " + prefab + " won't cast to GameObject");
            }
        }
        EditorUtility.ClearProgressBar();
    }
 
 
    static void FindMissingPrefabInGO(GameObject g, string prefabName, bool isRoot)
    {
        if (g.name.Contains("Missing Prefab"))
        {
            Debug.LogError($"{prefabName} has missing prefab {g.name}");
            return;
        }
 
        if (PrefabUtility.IsPrefabAssetMissing(g))
        {
            Debug.LogError($"{prefabName} has missing prefab {g.name}");
            return;
        }
 
        if (PrefabUtility.IsDisconnectedFromPrefabAsset(g))
        {
            Debug.LogError($"{prefabName} has missing prefab {g.name}");
            return;
        }
 
        if (!isRoot)
        {
            if (PrefabUtility.IsAnyPrefabInstanceRoot(g))
            {
                return;
            }
            GameObject root = PrefabUtility.GetNearestPrefabInstanceRoot(g);
            if (root == g)
            {
                return;
            }
        }
 
 
        // Now recurse through each child GO (if there are any):
        foreach (Transform childT in g.transform)
        {
            //Debug.Log("Searching " + childT.name  + " " );
            FindMissingPrefabInGO(childT.gameObject, prefabName, false);
        }
    }
 
    public static string[] GetAllPrefabs()
    {
        string[] temp = AssetDatabase.GetAllAssetPaths();
        List<string> result = new List<string>();
        foreach (string s in temp)
        {
            if (s.Contains(".prefab")) result.Add(s);
        }
        return result.ToArray();
    }
}