"ArgumentException" error appears when opening Project Library in the UI Builder if the script is using "namespace Assets"

Unity: UI Builder

Fixed

2023.1.X

2022.2.X

2022.1.X

Fixed in: 1.0.0 (2023.1.0a1)

Fixed in: 2022.2.0b1

Fixed in: 2022.1.9f1

How to reproduce:
1. Open project "UIBuilderBug.zip"
2. Open the "TestDocument.uxml" document (Assets > TestDocument)
3. In the UI Builder press the "Project" button in the Library tab
4. Observe the Console window

Expected result: No errors appear
Actual result: "ArgumentException: An item with the same key has already been added. Key: 96046115" error appears

Reproducible with: 1.0.0 (2022.1.0a16, 2022.1.0f1, 2022.2.0a12)
Not reproducible with: 1.0.0-preview.18 (2019.4.39f1, 2020.3.34f1), 1.0.0 (2021.3.2f1, 2022.1.0a15)

"ArgumentException" error appears when opening Project Library in the UI Builder if the script is using "namespace Assets"

Unity: UI Builder

Fixed

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"ArgumentException" error appears when opening Project Library in the UI Builder if the script is using "namespace Assets"

Unity: UI Builder

Statuses

Fixed

Resolution Notes

2023.1.XFixedFixed in: 1.0.0 (2023.1.0a1)

2022.2.XFixedFixed in: 2022.2.0b1

2022.1.XFixedFixed in: 2022.1.9f1

Description

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