[release/6.0] Fix cancel in PipeReader.ReadAtLeastAsync #66870
Merged
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Backport of #66752 to release/6.0
/cc @BrennanConroy
Customer Impact
Reported by customer in #66645.
This bug causes cancellation tokens to be ignored in some cases when using
PipeReader.ReadAtLeastAsync
which can create hangs.Testing
Added improved test coverage for cancellation tokens and verified the scenario provided is fixed.
Risk
Low. Very small fix that doesn't affect other code paths.