Showing a second ObjectPicker as soon as the first one closes freezes the editor

In an editor I'm trying to show 2 ObjectPicker 's consecutively, I need the editor to select 2 different object one after the other. The second picker will be shown right after the first one is closed. But this freezes the Unity editor as if it has entered an endless loop. Am I doing something wrong or is this a bug?

Code (CSharp):

1. using UnityEngine;
2. using UnityEditor;
3.  
4. internal sealed class BugTest : EditorWindow {
5.     private int _id1;
6.     private int _id2;
7.  
8.     [MenuItem("BUG/Object Picker Freeze Test")]
9.     private static void Init() {
10.         var window = GetWindow<BugTest>();
11.         window.Show();
12.     }
13.  
14.     private void OnGUI() {
15.         if (GUILayout.Button("Open Object Picker")) {
16.             _id1 = GUIUtility.GetControlID(FocusType.Passive);
17.             _id2 = GUIUtility.GetControlID(FocusType.Passive);
18.  
19.             EditorGUIUtility.ShowObjectPicker<Transform>(null, true, string.Empty, _id1);
20.         }
21.  
22.         var e = Event.current;
23.  
24.         if (e.type == EventType.ExecuteCommand &&
25.             e.commandName == "ObjectSelectorClosed" &&
26.             EditorGUIUtility.GetObjectPickerControlID() == _id1) {
27.  
28.             e.Use();
29.  
30.             Debug.Log("First object picker is closed, now trying to show the second object picker!");
31.             EditorGUIUtility.ShowObjectPicker<Transform>(null, true, string.Empty, _id2);
32.         }
33.     }
34. }

 

If I do these when "ObjectSelectorUpdated" event is raised, it doesn't freeze the editor. "ObjectSelectorClosed" causes the problem. So why is that so?

 

Sounds like a bug to me. I'd try deferring the creation of the second picker to something like the next editor update.

 

I've reported it and it was confirmed as a bug. Hopefully it'll get fixed soon.