Fixed a series of exceptions happening when trying to load an asset during wizard execution (1262171).

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -737,6 +737,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Remove MSAA debug mode when renderpipeline asset has no MSAA
 - Fixed some post processing using motion vectors when they are disabled
 - Fixed the multiplier of the environement lights being overriden with a wrong value for ray tracing (1260311).
+- Fixed a series of exceptions happening when trying to load an asset during wizard execution (1262171).
 
 ### Changed
 - Improve MIP selection for decals on Transparents

com.unity.render-pipelines.high-definition/Editor/Wizard/HDWizard.Configuration.cs

@@ -217,9 +217,14 @@ class QueuedLauncher
             Queue<Action> m_Queue = new Queue<Action>();
             bool m_Running = false;
             bool m_StopRequested = false;
+            bool m_OnPause = false;
 
             public void Stop() => m_StopRequested = true;
 
+            // Function to pause/unpause the action execution
+            public void Pause() => m_OnPause = true;  
+            public void Unpause() => m_OnPause = false;
+
             public int remainingFixes => m_Queue.Count;
 
             void Start()
@@ -242,7 +247,12 @@ void Run()
                     m_StopRequested = false;
                 }
                 if (m_Queue.Count > 0)
-                    m_Queue.Dequeue()?.Invoke();
+                {
+                    if (!m_OnPause)
+                    {
+                        m_Queue.Dequeue()?.Invoke();
+                    }
+                }
                 else
                     End();
             }

com.unity.render-pipelines.high-definition/Editor/Wizard/HDWizard.UIElement.cs

@@ -32,6 +32,9 @@ static class ObjectSelector
             public static bool opened
                 => Resources.FindObjectsOfTypeAll(typeof(PlayerSettings).Assembly.GetType("UnityEditor.ObjectSelector")).Length > 0;
 
+            // Action to be called with the window is closed
+            static Action s_OnClose;
+
             static ObjectSelector()
             {
                 Type playerSettingsType = typeof(PlayerSettings);
@@ -73,12 +76,22 @@ static ObjectSelector()
                 GetCurrentObject = getCurrentObjectLambda.Compile();
             }
 
-            public static void Show(UnityEngine.Object obj, Type type, Action<UnityEngine.Object> onChangedObject)
+            public static void Show(UnityEngine.Object obj, Type type, Action<UnityEngine.Object> onChangedObject, Action onClose)
             {
                 id = GUIUtility.GetControlID("s_ObjectFieldHash".GetHashCode(), FocusType.Keyboard);
                 GUIUtility.keyboardControl = id;
                 ShowObjectSelector(obj, type, onChangedObject);
                 selectorID = id;
+                ObjectSelector.s_OnClose = onClose;
+                EditorApplication.update += CheckClose;
+            }
+            static void CheckClose()
+            {
+                if (!opened)
+                {
+                    ObjectSelector.s_OnClose?.Invoke();
+                    EditorApplication.update -= CheckClose;
+                }
             }
 
             public static void CheckAssignationEvent<T>(Action<T> assignator)
@@ -132,8 +145,12 @@ void CreateOrLoad<T>(Action onCancel, Action<T> onObjectChanged)
                     onCancel?.Invoke();
                     break;
                 case 2: //Load
-                    ObjectSelector.Show(target, typeof(T), o => onObjectChanged?.Invoke((T)o));
-                    break;
+                    {
+                        m_Fixer.Pause();
+                        ObjectSelector.Show(target, typeof(T), o => onObjectChanged?.Invoke((T)o), m_Fixer.Unpause);
+                        break;
+                    }
+
                 default:
                     throw new ArgumentException("Unrecognized option");
             }