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Unhandeled exceptions are thrown when debugging with JetBrains Rider IDE



Steps to reproduce:
1. Open the attached "case_1367206_repro" project
2. Select any version of Rider IDE in Edit > Preferences > External Tools > External Script Editor
3. In Project windows open Assets > "UnhandledExceptionClass.cs"
4. Select "Attach to Unity Editor & Play" in Rider IDE
5. Select Run > Debug from the main menu in Rider IDE

Expected result: no unhandled exceptions are thrown in Rider IDE
Actual result: unhandled exception is thrown in Rider IDE

Reproducible with: 2021.2.0a18, 2021.2.0b14, 2022.1.0a11
Not reproducible with: 2019.4.34f1, 2020.3.20f1, 2021.1.24f1, 2021.2.0a17

- workaround for this issue in Rider IDE is to uncheck "Brake on unhandled exceptions"
- in 2021.2.0a18 Mono was updated from 5.11.0 to 6.13.0
- no unhandled exceptions are thrown in Microsoft Visual Studio

  1. Resolution Note (2022.1.X):

    Reverted behavior in 2021.2 to not break on unhandled exceptions. However this behavior is actually intended and is due to a bugfix from upstream mono ( We have decided to push back the introduction of this behavior to allow for a smoother reintroduction of it later.

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