Fix flaky test: cancellationpropagatestotask#19569
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Add synchronization to ensure the async computation has actually started running on the thread pool before cancelling the default token. Without this, under heavy CI load the thread pool may not schedule the async within the 1-second wait window, causing the task to never transition to Canceled state before the timeout. This mirrors the pattern already used by the CancellationPropagatesToGroup test which uses a ManualResetEvent for the same purpose. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Apr 14, 2026
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Add synchronization to ensure the async computation has actually started running on the thread pool before cancelling the default token. Without this, under heavy CI load the thread pool may not schedule the async within the 1-second wait window, causing the task to never transition to Canceled state before the timeout. This mirrors the pattern already used by the CancellationPropagatesToGroup test which uses a ManualResetEvent for the same purpose. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: T-Gro <46543583+T-Gro@users.noreply.github.com>
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Automated fix for flaky test.
Test: FSharp.Core.UnitTests.Control.AsyncType.CancellationPropagatesToTask