Search Issue Tracker

Duplicate

Votes

0

Found in

2022.1.0b6

Issue ID

1400437

Regression

Yes

UIToolkit with UIDocument - InvalidOperationException

UI Toolkit

-

1. What happened
- Changing any value to any VisualElement in UIBuilder or via scripts creates an error (Invalid Operation Exception, see the stacktrace below).

2. How can we reproduce it using the example you attached
- Open the scene file
- Select UIDocument in the scene, open Test (Visual Tree Asset) so UI Builder opens up
- Do anything to any element (Label) in the tree, e.g. change opacity, position, apply any style (via editor or style script) and the error message will appear in the console

This error occours in Unity 2022.1.b5 and 2022.1.b6. No errors with 2021.2.10f1 version.

Stacktrace:
InvalidOperationException: Collection was modified; enumeration operation may not execute.
System.Collections.Generic.List`1+Enumerator[T].MoveNextRare () (at <cdc4992cc04a4e77a24a09cd121af77b>:0)
System.Collections.Generic.List`1+Enumerator[T].MoveNext () (at <cdc4992cc04a4e77a24a09cd121af77b>:0)
UnityEngine.UIElements.UIElementsRuntimeUtility.UpdateRuntimePanels () (at <9fb9706855a847a1926259ab0baf1b3c>:0)
UnityEngine.UIElements.UIElementsRuntimeUtilityNative.UpdateRuntimePanels () (at <05a8bc2f25e84bdebc90d31147b4881d>:0)

Note: We tried on Windows and it looks like its affecting MAC only.

  1. This is a duplicate of issue #1402588

    Asset reimportation/refresh cause exception when displayed on the game view
Log in to vote on this issue

Comments (2)

  1. manuelgoellnitz

    Mar 22, 2022 08:32

    If this is a duplicate, where is the other ticket with the same bug?
    A link would be nice.

    I have this problem on WebGL, so it seams not MAC only and on Unity 2021.2.15

  2. Nanomid

    Feb 24, 2022 23:05

    I have this issue constantly.
    InvalidOperationException: Collection was modified; enumeration operation may not execute.
    System.Collections.Generic.List`1+Enumerator[T].MoveNextRare () (at <7b935204f5ff4bcab44b3b0ebca330bf>:0)
    System.Collections.Generic.List`1+Enumerator[T].MoveNext () (at <7b935204f5ff4bcab44b3b0ebca330bf>:0)
    UnityEngine.UIElements.UIElementsRuntimeUtility.UpdateRuntimePanels () (at <a40fb3db3ff84d2d9bf85ec84d6c5573>:0)
    UnityEngine.UIElements.UIElementsRuntimeUtilityNative.UpdateRuntimePanels () (at <4e881c99ae1a43bfa47861981e2726e0>:0)

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.

Latest issues

See all new issues