找來找去發現是由於UILabel 引用了Library/unity editor resources中的字型引發的。

所以我寫了個指令碼，來check所有UILabel的字型名稱, 並顯示錯誤引用字型的Prefab

using UnityEngine;  
using System.Collections;  
using System.Collections.Generic;  
using UnityEditor;  
using System.IO;  

public class PrefabCheck : MonoBehaviour {
	// 在選單來建立 選項 ， 點選該選項執行搜尋程式碼  
	[MenuItem("Tools/Check Font")]
	static void CheckSceneSetting() {
		List<string> dirs = new List<string>();  
		GetDirs(Application.dataPath, ref dirs);  

	}  
	//引數1 為要查詢的總路徑， 引數2 儲存路徑  
	private static void GetDirs(string dirPath, ref List<string> dirs)  
	{  
		foreach (string path in Directory.GetFiles(dirPath))  
		{  
			//獲取所有資料夾中包含字尾為 .prefab 的路徑  
			if (System.IO.Path.GetExtension(path) == ".prefab")  
			{  
				dirs.Add(path.Substring(path.IndexOf("Assets")));
				GameObject obj =  (GameObject)AssetDatabase.LoadAssetAtPath (path.Substring(path.IndexOf("Assets")), typeof(GameObject));
				if(obj != null){
					GameObject instance =  Instantiate(obj);
					UILabel[] labels = instance.GetComponentsInChildren<UILabel>();
					foreach(UILabel label in labels){
						if(label.trueTypeFont != null && label.trueTypeFont.name.Contains("Lucida")){
							Debug.Log(label.trueTypeFont.name);
							Debug.Log(path.Substring(path.IndexOf("Assets")));  
						}
						if(label.bitmapFont != null && label.bitmapFont.name.Contains("Lucida")){
							Debug.Log(label.bitmapFont.name);
							Debug.Log(path.Substring(path.IndexOf("Assets")));
						}
					}
					DestroyImmediate(instance);
				} else {
					Debug.LogError(path.Substring(path.IndexOf("Assets")));  
				}


			}  
		}  
		
		if (Directory.GetDirectories(dirPath).Length > 0)  //遍歷所有資料夾  
		{  
			foreach (string path in Directory.GetDirectories(dirPath))  
			{  
				GetDirs(path, ref dirs);  
			}  
		}  
	}  
}