An error gets thrown in the console when restoring a dirty ARC asset that had been deleted externally.

Regression details

I could reproduce it on 2023.2.0b16 but not on 2023.2.0b10

Repro

1. Create an ARC asset (Assets > Create > Audio > Audio Random Container).
2. Open the ARC.
3. Edit the volume of the ARC.
4. Right-click on the ARC asset and select Reveal in Finder.
5. Delete the ARC asset and its associated meta file.
6. Switch back to Unity to update the editor with the deleted asset.
7. Switch back to Finder and undo the deletion to restore the file.
8. Switch back to Unity.

Expected: No errors in the Console.

Actual: Null reference error in the Console.

Note

I did not test editing other values than volume. Neither did I test whether this can occur with version control.

Stack trace
{code:java}
NullReferenceException: Object reference not set to an instance of an object
UnityEditor.AudioContainerWindow.OnVolumeChanged (UnityEngine.UIElements.ChangeEvent`1[T] evt) (at /Users/bokken/build/output/unity/unity/Editor/Mono/Audio/AudioContainerWindow.cs:473)
UnityEngine.UIElements.EventCallbackFunctor`1[TEventType].Invoke (UnityEngine.UIElements.EventBase evt) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventCallback.cs:64)
UnityEngine.UIElements.EventCallbackRegistry+DynamicCallbackList.Invoke (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventCallbackRegistry.cs:228)
UnityEngine.UIElements.EventDispatchUtilities.HandleEvent_BubbleUpCallbacks (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement element) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventDispatchUtilities.cs:385)
UnityEngine.UIElements.EventDispatchUtilities.HandleEventAcrossPropagationPath (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target, System.Boolean isCapturingTarget) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventDispatchUtilities.cs:183)
UnityEngine.UIElements.EventDispatchUtilities.PropagateEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.VisualElement target, System.Boolean isCapturingTarget) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventDispatchUtilities.cs:61)
UnityEngine.UIElements.EventDispatchUtilities.DefaultDispatch (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventDispatchUtilities.cs:564)
UnityEngine.UIElements.EventBase.Dispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Events/EventBase.cs:110)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/EventDispatcher.cs:336)
UnityEngine.UIElements.EventDispatcher.Dispatch (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.BaseVisualElementPanel panel, UnityEngine.UIElements.DispatchMode dispatchMode) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/EventDispatcher.cs:200)
UnityEngine.UIElements.BaseVisualElementPanel.SendEvent (UnityEngine.UIElements.EventBase e, UnityEngine.UIElements.DispatchMode dispatchMode) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Panel.cs:567)
UnityEngine.UIElements.VisualElement.SendEvent (UnityEngine.UIElements.EventBase e) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualElement.cs:1566)
UnityEngine.UIElements.BaseField`1[TValueType].set_value (TValueType value) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/InputField/BaseField.cs:195)
UnityEngine.UIElements.BaseSlider`1[TValueType].set_value (TValueType value) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/BaseSlider.cs:217)
UnityEngine.UIElements.BaseField`1[TValueType].SetValueWithoutValidation (TValueType newValue) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Controls/InputField/BaseField.cs:499)
UnityEditor.UIElements.Bindings.SerializedObjectBinding`1[TValue].AssignValueToField (TValue lastValue) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:1919)
UnityEditor.UIElements.Bindings.SerializedObjectBindingPropertyToBaseField`2[TProperty,TValue].SyncPropertyToField (UnityEngine.UIElements.INotifyValueChanged`1[T] c, UnityEditor.SerializedProperty p) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:1785)
UnityEditor.UIElements.Bindings.SerializedObjectBindingToBaseField`2[TValue,TField].OnPropertyValueChanged (UnityEditor.SerializedProperty currentPropertyIterator) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:1691)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.DefaultOnPropertyChange (System.Object cookie, UnityEditor.SerializedProperty changedProp) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:764)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext+<>c.<RegisterBindingObject>b__48_0 (System.Object o, UnityEditor.SerializedProperty p) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:783)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext+TrackedValue.Update (UnityEditor.UIElements.Bindings.SerializedObjectBindingContext context, UnityEditor.SerializedProperty currentProp) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:611)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext+TrackedValues.Update (UnityEditor.UIElements.Bindings.SerializedObjectBindingContext context, UnityEditor.SerializedProperty currentProperty) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:719)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.UpdateTrackedProperties () (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:835)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.OnSerializedObjectChanged () (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:568)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.UpdateRevision () (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:525)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContext.UpdateIfNecessary (UnityEngine.UIElements.VisualElement element) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:548)
UnityEditor.UIElements.Bindings.SerializedObjectBindingBase.Update (UnityEngine.UIElements.BindingContext& context) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/BindingExtensions.cs:1305)
UnityEngine.UIElements.BindingUpdater.UpdateUI (UnityEngine.UIElements.BindingContext& context, UnityEngine.UIElements.CustomBinding customBinding) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Bindings/BindingUpdater.cs:191)
UnityEngine.UIElements.BindingUpdater.UpdateUI (UnityEngine.UIElements.BindingContext& context, UnityEngine.UIElements.Binding bindingObject) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Bindings/BindingUpdater.cs:123)
UnityEngine.UIElements.VisualTreeDataBindingsUpdater.Update () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Bindings/VisualTreeDataBindingUpdater.cs:209)
UnityEngine.UIElements.VisualTreeUpdater.UpdateVisualTreePhase (UnityEngine.UIElements.VisualTreeUpdatePhase phase) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualTreeUpdater.cs:114)
UnityEngine.UIElements.Panel.UpdateDataBinding () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Panel.cs:1161)
UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.UpdateSchedulers () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:275)
UnityEngine.UIElements.UIEventRegistration.UpdateSchedulers () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:105)
UnityEditor.RetainedMode.UpdateSchedulers () (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/RetainedMode.cs:55) {code}