IDToPointer assert on async levelload

Hi,

I have in my project (unity 4.1.0) a couple of scenes
- Init (which load Menu asynchronously)
- Menu
- Other scenes

When I play the Menu-scene in editor, everything works fine, however when I load the scene asynchronous from Init, I get the following error: (no back-trace)

Code (csharp):

1. ms_IDToPointer->find (obj->GetInstanceID ()) == ms_IDToPointer->end ()

This error does not show when I load the Menu-scene asynchronously from one of the other scenes.

I don't recall when I first saw the problem, but at first I didn't really payed any attention to it, since everything seemed to work just fine.
But as it turns out, everything is not okay, this issue breaks the iPad build.

I was able to pinpoint the script that causes the problem. It's used to automatically generate a quad with the correct aspect ratio for a given texture to be used as button. (kinda like GUITexture)

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class MeshButton : MonoBehaviour {
5.  
6.     [SerializeField]
7.     private Texture2D m_oTexture;  
8.     [SerializeField]
9.     private MeshRenderer m_oRenderer;
10.     [SerializeField]
11.     private MeshFilter m_oFilter;
12.     [SerializeField]
13.     private BoxCollider m_oCollider;
14.    
15.     public Texture2D Texture {get{return m_oTexture;}}
16.    
17.     public void Assure() {
18.         m_oRenderer = gameObject.GetComponent<MeshRenderer>();
19.         m_oFilter = gameObject.GetComponent<MeshFilter>();
20.         m_oCollider = gameObject.GetComponent<BoxCollider>();
21.        
22.         // Assure renderer
23.         if(null == m_oRenderer) {
24.             m_oRenderer = gameObject.AddComponent<MeshRenderer>();
25.         }
26.         m_oRenderer.hideFlags = HideFlags.HideInInspector;
27.  
28.         // Assure meshfilter
29.         if(null == m_oFilter) {
30.             m_oFilter = gameObject.AddComponent<MeshFilter>();
31.         }
32.         m_oFilter.hideFlags = HideFlags.HideInInspector;
33.        
34.         // Assure collider
35.         if(null == m_oCollider) {
36.             m_oCollider = gameObject.AddComponent<BoxCollider>();
37.         }
38.         m_oCollider.hideFlags = 0;
39.        
40.         // Assure correct material
41.         var oMaterial = Application.isPlaying ? m_oRenderer.material : m_oRenderer.sharedMaterial;
42.         if(null != oMaterial) {
43.             if(Application.isPlaying) Destroy(oMaterial);
44.             else DestroyImmediate(oMaterial);
45.             oMaterial = null;
46.         }
47.         if(null == oMaterial) {
48.             oMaterial = new Material(Shader.Find("Unlit/Transparent"));
49.             if(Application.isPlaying) m_oRenderer.material = oMaterial;
50.             else m_oRenderer.sharedMaterial = oMaterial;
51.         }
52.         if(Application.isPlaying) m_oRenderer.material.hideFlags = HideFlags.HideInInspector;
53.         else m_oRenderer.sharedMaterial.hideFlags = HideFlags.HideInInspector;
54.  
55.         // Apply texture
56.         if(Application.isPlaying) m_oRenderer.material.mainTexture = m_oTexture;
57.         else m_oRenderer.sharedMaterial.mainTexture = m_oTexture;
58.  
59.         // Assure old mesh is removed
60.         var oMesh = Application.isPlaying ? m_oFilter.mesh : m_oFilter.sharedMesh;
61.         if(Application.isPlaying) Destroy(oMesh);
62.         else DestroyImmediate(oMesh);
63.        
64.         // If valid texture, make mesh
65.         if(null != m_oTexture) {
66.            
67.             // Assure mesh
68.             float nRatio = (float)Texture.width / (float)Texture.height;
69.            
70.             float nRatioX = nRatio > 1f ? 1f : nRatio;
71.             float nRatioY = nRatio < 1f ? 1f : 1f / nRatio;
72.            
73.             m_oCollider.size = new Vector3(nRatioX, nRatioY, 0.25f);
74.            
75.             float nMinX = -0.5f * nRatioX;
76.             float nMinY = -0.5f * nRatioY;
77.             float nMaxX = 0.5f * nRatioX;
78.             float nMaxY = 0.5f * nRatioY;
79.            
80.             oMesh = new Mesh();
81.            
82.             var aVertex = new Vector3[] {
83.                 new Vector3(nMinX, nMaxY, 0),
84.                 new Vector3(nMaxX, nMaxY, 0),
85.                 new Vector3(nMaxX, nMinY, 0),
86.                 new Vector3(nMinX, nMinY, 0)
87.             };
88.            
89.             var aUv = new Vector2[] {
90.                 new Vector2(0, 1),
91.                 new Vector2(1, 1),
92.                 new Vector2(1, 0),
93.                 new Vector2(0, 0)
94.             };
95.            
96.             var aIndex = new int[] {
97.                 0, 1, 3,
98.                 1, 2, 3
99.             };
100.    
101.             oMesh.vertices = aVertex;
102.             oMesh.triangles = aIndex;
103.             oMesh.uv = aUv;
104.            
105.             if(Application.isPlaying) m_oFilter.mesh = oMesh;
106.             else m_oFilter.sharedMesh = oMesh;
107.         }
108.     }
109.    
110.     public void SetTexture(Texture2D oTexture) {       
111.         if(m_oTexture != oTexture) {
112.            
113.             m_oTexture = oTexture;
114.        
115.             Assure();
116.         }
117.     }
118. }
119.  

Somebody else has some experience with this sort problem, or a solution perhaps ?

 

Don't know why, but switching to Android and switching back fixed it for me!

 

FYI, I also ran into this problem.

I had built a custom data editor for our game. It used a lot of reflection and serialization. That's the short version anyways.

The problem ended up being if I had the editor open while the game was running it would throw several to many of these errors when the game would start:

Code (csharp):

1. ms_IDToPointer->find (obj->GetInstanceID ()) == ms_IDToPointer->end ()

I put some early out logic in my data editors OnGUI to not display while the game was running and that took care of the problem.