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Fixed in 2021.2.X

Fixed in 2019.4.X, 2020.3.X, 2021.1.X



Found in



Issue ID




[UIR] Nested masking fallback of GroupTransform VisualElement triggers assert

UI Toolkit


Repro steps:
1. Open the attached project
2. Open the provided window under Bug/GroupClipAssert menu

Actual result: An assert fails in DepthFirstOnClippingChanged
Expected result: No assert should fail

The nested masking, which is not supported in this version, forces the leaf GroupTransform element to fallback to rect clipping, but the assert presumed that it could not happen.

21.2: After nested masking has been implemented, additional masking levels are required to reproduce this issue
21.1: Buggy
20.x: Buggy
19.4: Buggy

  1. Resolution Note (fix version 2021.2):

    Fixed in 2021.2.0a18.2505

  2. Resolution Note (fix version 2021.1):

    Fixed in 2021.1.9f1

  3. Resolution Note (fix version 2020.3):

    Fixed in 2020.3.12f1

  4. Resolution Note (fix version 2019.4):

    Fixed in 2019.4.27f1

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