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Fixed in 2022.2.X

Fixed in 2021.3.X, 2022.1.X



Found in

Issue ID




Asset reimportation/refresh cause exception when displayed on the game view

UI Toolkit


no present in 2022.1.0a16.2319
present in 2022.2.0a1.319

Create a new UXML t with a few elements, assign in a UI document and set the game view to be visible.

Update the UXML using the builder or directly in the file, save.

This error occurs:

InvalidOperationException: Collection was modified; enumeration operation may not execute.
System.Collections.Generic.List`1+Enumerator[T].MoveNextRare () (at <1e9cd68e7ce24991a6446c83955843f7>:0)
System.Collections.Generic.List`1+Enumerator[T].MoveNext () (at <1e9cd68e7ce24991a6446c83955843f7>:0)
UnityEngine.UIElements.UIElementsRuntimeUtility.UpdateRuntimePanels () (at U:/U/t3/ModuleOverrides/com.unity.ui/Core/UIElementsRuntimeUtility.cs:218)
UnityEngine.UIElements.UIElementsRuntimeUtilityNative.UpdateRuntimePanels () (at U:/U/t3/Modules/UIElementsNative/UIElementsUtility.bindings.cs:26)

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