Y'all are not going to believe why we had to revert this PR.
https://github.com/swiftlang/swift-testing/pull/770
It's because a new unit test was opening "COM0" on Windows (expecting it to fail so we could test failure modes) but the CI VM apparently has COM0 configured. And since nothing was reading from COM0, it hung the test process on write.
Why would we fail to open a file named "COM0" on Windows? Blame Richard Nixon? https://x.com/Foone/status/1058676834940776450 (With thanks to @foone for the writeup.)
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