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Fixed in 2021.2.X



Found in





Issue ID




Unity Editor hangs for a long time when switching to release mode after attaching C# script to Unity



How to reproduce:
1. Create a new project
2. Create a new C# script and open it
3. Click the "Attach to Unity" button
4. End Debugging
5. Go to the Unity Editor
6. In the bottom right click the bug icon
7. Click the "Switch to release mode" button

Expected result: Switching to release mode is successful
Actual result: The Editor hangs for a really long time

Reproducible with: 2021.2.0a1, 2021.2.13f1, 2022.1.0a1, 2022.1.0b9, 2022.2.0a1
Not reproducible with: 2020.3.32f1, 2021.2.14f1, 2021.2.16f1, 2022.1.0b10, 2022.1.0b13, 2022.2.0a2, 2022.2.0a8
Couldn't test with: 2019.4.36f1 (no release mode)

Reproducible with:
Visual Code Editor 2.0.14
Visual Studio Code Editor 1.2.5
Couldn't test with:
JetBrains Rider Editor 3.0.12(error attaching to Unity Editor)

Note: If you are not able to reproduce delete the Library folder and the .sln file from the project folder before opening

  1. Resolution Note (fix version 2021.2):

    Fixed in: 2021.2.14f1, 2022.1.0b10, 2022.2.0a2

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