Unity 重新加载脚本就报错！！，求大神帮忙看下！！

详细错误描述：NullReferenceException: Object reference not set to an instance of an object
UnityEditor.GameObjectInspector.ClearPreviewCache () (at <40513f04ef114c8db39ee74008ebaf26>:0)
UnityEditor.GameObjectInspector.OnDisable () (at <40513f04ef114c8db39ee74008ebaf26>:0)

还有：

SerializedObjectNotCreatableException: Object at index 0 is null
UnityEditor.Editor.CreateSerializedObject () (at <40513f04ef114c8db39ee74008ebaf26>:0)
UnityEditor.Editor.GetSerializedObjectInternal () (at <40513f04ef114c8db39ee74008ebaf26>:0)
UnityEditor.Editor.get_serializedObject () (at <40513f04ef114c8db39ee74008ebaf26>:0)
UnityEditor.GameObjectInspector.OnEnable () (at <40513f04ef114c8db39ee74008ebaf26>:0)

就是这个方法中ClearPreviewCache，访问了不存在的(已删除的)游戏对象