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Toot

Written by Jonathan Grynspan on 2024-11-03 at 00:24

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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Written by Poliorcetics on 2024-11-03 at 00:42

@grynspan @foone why was it immediately reverted ?? https://github.com/swiftlang/swift-testing/pull/793

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Written by Jonathan Grynspan on 2024-11-03 at 00:44

@poliorcetics https://i.redd.it/r8ynoqbbf4oc1.gif

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Written by Poliorcetics on 2024-11-03 at 01:28

@grynspan oh fu I read you post wrong 😑 I should go to sleep I think

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Written by Pär Björklund on 2024-11-03 at 07:22

@grynspan @foone fun fact, you can use any double digit number because they require the special prefix \?\ to be addressable 😀

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Written by Jonathan Grynspan on 2024-11-03 at 14:34

@Paxxi @foone Eh, the point of the test was just to ensure that the code in question would fail gracefully—doesn't really matter which reserved filename we used. (I'm honestly tempted to just drop the attempt to special-case those names and say "this is an OS issue.")

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Written by gunstick on 2024-11-03 at 09:14

@grynspan @foone ypur link to x.com does not work.

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