Undoing added list element in prefab throws an error: SerializedProperty _sand.clips.Array.data[0] has disappeared!

Unity: UI Toolkit Controls

Error

Fixed

2022.3.X

2022.3.21f1

Steps to reproduce: # Download and open the attached project Serialized List Undo Error.zip.

Open the SampleScene.
Open the GameObject prefab in scene prefab edit mode by clicking on the arrow on the right of it in the hierarchy.
Click the plus button to add a list element.
Undo.
If no error appears:
1. Click on the plus button again to add a list element.
2. Click on the minus button to remove it.
3. Repeat steps 4-6.

Actual results: Errors are thrown in the console
Expected results: No error is thrown in the console

Regression details:
Reproducible on 2022.2.0a17 ❌
Not reproducible on 2022.2.0a16 ✅

Reproducible with versions: 2022.3.20f1

Not reproducible with versions: 2021.3.34f1, 2023.2.7f1, 2023.3.0b7

Tested on (OS): Mac (M1) and Windows

Stack trace 1/2

ObjectDisposedException: SerializedProperty _sand.clips.Array.data[0] has disappeared! UnityEditor.SerializedProperty.Verify (UnityEditor.SerializedProperty+VerifyFlags verifyFlags) (at /Users/bokken/buildslave/unity/build/Editor/Mono/SerializedProperty.bindings.cs:478) UnityEditor.SerializedProperty.get_objectReferenceInstanceIDValue () (at /Users/bokken/buildslave/unity/build/Editor/Mono/SerializedProperty.bindings.cs:1411) UnityEditor.EditorGUIUtility.ObjectContent (UnityEngine.Object obj, System.Type type, UnityEditor.SerializedProperty property, UnityEditor.EditorGUI+ObjectFieldValidator validator) (at /Users/bokken/buildslave/unity/build/Editor/Mono/EditorGUIUtility.cs:1002) UnityEditor.UIElements.ObjectField+ObjectFieldDisplay.Update () (at /Users/bokken/buildslave/unity/build/Editor/Mono/UIElements/Controls/ObjectField.cs:137) UnityEditor.UIElements.ObjectField.UpdateDisplay () (at /Users/bokken/buildslave/unity/build/Editor/Mono/UIElements/Controls/ObjectField.cs:90) UnityEngine.UIElements.VisualElement+SimpleScheduledItem.PerformTimerUpdate (UnityEngine.UIElements.TimerState state) (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/VisualElementScheduler.cs:341) UnityEngine.UIElements.TimerEventScheduler.UpdateScheduledEvents () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/Scheduler.cs:362) UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.UpdateSchedulers () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/UIElementsUtility.cs:253) UnityEngine.UIElements.UIEventRegistration.UpdateSchedulers () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/UIElementsUtility.cs:105) UnityEditor.RetainedMode.UpdateSchedulers () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Editor/RetainedMode.cs:55)

Stack trace 2/2

InvalidOperationException: The operation is not possible when moved past all properties (Next returned false) UnityEditor.SerializedProperty.Verify (UnityEditor.SerializedProperty+VerifyFlags verifyFlags) (at /Users/bokken/buildslave/unity/build/Editor/Mono/SerializedProperty.bindings.cs:481) UnityEditor.SerializedProperty.get_objectReferenceInstanceIDValue () (at /Users/bokken/buildslave/unity/build/Editor/Mono/SerializedProperty.bindings.cs:1411) UnityEditor.EditorGUIUtility.ObjectContent (UnityEngine.Object obj, System.Type type, UnityEditor.SerializedProperty property, UnityEditor.EditorGUI+ObjectFieldValidator validator) (at /Users/bokken/buildslave/unity/build/Editor/Mono/EditorGUIUtility.cs:1002) UnityEditor.UIElements.ObjectField+ObjectFieldDisplay.Update () (at /Users/bokken/buildslave/unity/build/Editor/Mono/UIElements/Controls/ObjectField.cs:137) UnityEditor.UIElements.ObjectField.UpdateDisplay () (at /Users/bokken/buildslave/unity/build/Editor/Mono/UIElements/Controls/ObjectField.cs:90) UnityEngine.UIElements.VisualElement+SimpleScheduledItem.PerformTimerUpdate (UnityEngine.UIElements.TimerState state) (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/VisualElementScheduler.cs:341) UnityEngine.UIElements.TimerEventScheduler.UpdateScheduledEvents () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/Scheduler.cs:362) UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.UpdateSchedulers () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/UIElementsUtility.cs:253) UnityEngine.UIElements.UIEventRegistration.UpdateSchedulers () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Core/UIElementsUtility.cs:105) UnityEditor.RetainedMode.UpdateSchedulers () (at /Users/bokken/buildslave/unity/build/ModuleOverrides/com.unity.ui/Editor/RetainedMode.cs:55)

Undoing added list element in prefab throws an error: SerializedProperty _sand.clips.Array.data[0] has disappeared!

Unity: UI Toolkit Controls

Fixed

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Undoing added list element in prefab throws an error: SerializedProperty _sand.clips.Array.data[0] has disappeared!

Unity: UI Toolkit Controls

Statuses

Fixed

Resolution Notes

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?