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Fixed in 2020.1.X

Fixed in 2019.4.X



Found in



Issue ID




Closing a Modal window using the Close method results in a NullReferenceException

UI Toolkit


How to reproduce:
1. Create a new Unity project
2. Import the user-attached script(EditorWindowTest1.cs)
3. In the Menu bar, select Test > New modal window
4. Close the window by clicking the 'Close' button

Expected result: no errors are thrown
Actual result: NullReferenceException is thrown

Reproducible with: 2019.3.10f1, 2019.4.0f1
Not reproducible with: 2019.3.9f1, 2020.1.0a1, 2020.1.0b12, 2020.2.0a14
Could not test with: 2018.4.23f1(UI Elements not yet implemented)

  1. Resolution Note (fix version 2020.1):

    Fixed in 2020.1.0a1

  2. Resolution Note (fix version 2019.4):

    Fixed in 2019.4.6f1

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