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Disable System.IO.Tests.FileStream_SafeFileHandle.ThrowWhenHandlePositionIsChanged_async test on Browser wasm #40920

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MaximLipnin
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The System.IO.Tests.FileStream_SafeFileHandle.ThrowWhenHandlePositionIsChanged_async test sometimes (flaky?) fails in CI on browser wasm (according to #40886) with PlatformNotSupportedException: Cannot wait on monitors on this runtime.
In this case we are used to marking the failing test with platform detection for the threading feature.

Closes #40886

@ghost
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ghost commented Aug 17, 2020

Tagging subscribers to this area: @safern, @ViktorHofer
See info in area-owners.md if you want to be subscribed.

@steveisok
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Do we have a sense of why it's flaky?

@MaximLipnin
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MaximLipnin commented Aug 18, 2020

Do we have a sense of why it's flaky?

Tried to find out in which conditions it could fail but I got it only once - it was during the first run on clean build. Other times I didn't manage to reproduce it.

@MaximLipnin
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OSX/iOS lanes fail with #41006

@danmoseley
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Merging as this is sufficiently validated and is breaking other PR validation jobs right now.

@danmoseley danmoseley merged commit 9401b2f into dotnet:master Aug 19, 2020
@MaximLipnin MaximLipnin deleted the wasm_disable_test_in_system.io.filename branch August 20, 2020 07:18
@Anipik
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Anipik commented Aug 20, 2020

/backport to release/5.0

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Started backporting to release/5.0: https://github.com/dotnet/runtime/actions/runs/217066409

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wasm test failure: System.IO.Tests.FileStream_SafeFileHandle.ThrowWhenHandlePositionIsChanged_async
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