How to make Sprite.OverrideGeometry() work?

Hi everyone!

From the Unity 5 Beta changelog:

Has anyone got this method to do anything? No matter how I tried, I'm always getting this error:

There is no explanation on why it is "not allowed", and the scripting reference page has nothing about this as well.
I am using this simple script for testing:

Spoiler

Code (CSharp):

1. using UnityEditor;
2. using UnityEngine;
3.  
4. // Creates a new Sprite that has mesh copied from a different Sprite
5. public class SpriteMeshReassigner : EditorWindow {
6.     private Sprite _sprite1;
7.     private Sprite _sprite2;
8.  
9.     [MenuItem("Tools/SpriteMeshReassigner")]
10.     private static void ShowWindow() {
11.         GetWindow<SpriteMeshReassigner>(true);
12.     }
13.  
14.     private void OnGUI() {
15.         _sprite1 = (Sprite) EditorGUILayout.ObjectField("Sprite 1", _sprite1, typeof(Sprite), false);
16.         _sprite2 = (Sprite) EditorGUILayout.ObjectField("Sprite 2", _sprite2, typeof(Sprite), false);
17.  
18.         if (GUILayout.Button("Reassign mesh")) {
19.             ushort[] sprite1Triangles = _sprite1.triangles;
20.             Vector2[] sprite1Vertices = _sprite1.vertices;
21.  
22.             Sprite newSprite = Sprite.Create(_sprite2.texture, _sprite2.rect, _sprite2.pivot, _sprite2.pixelsPerUnit, 0, SpriteMeshType.Tight);
23.             newSprite.OverrideGeometry(sprite1Vertices, sprite1Triangles);
24.             AssetDatabase.CreateAsset(newSprite, "Assets/testSprite.asset");
25.         }
26.     }
27. }

Any ideas? I really need this for some custom effects that require sprites having exactly the same tight meshes.

- Serhii

 

Probably this doesn't work for you, because you don't have the PRO license

 

Um, Unity 5 pre-order beta is only available to Pro customers, how could I not have the Pro license?..

 

Tried on rc2, same error..