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Add `ReturnCode`s to UART HIL, change `abort` policy #1049
Pull Request Overview
This updates the UART HIL to allow methods to fail. Previously, they would silently drop errors internally. The console should also bubble these errors back to userland correctly now. There are probably some more cases where underlying implementations can catch and report more errors, but this at least allows them to do that in the future.
This also updates
Hail + various other printing apps.
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The HIL doesn't seem to say anything about what abort_receive will actually guarantee or not, which I think is fine. I would be concerned if it did match the PR description, because I think being able to implement