Fix incorrect FileNotFoundError in load_nox_module #571
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Closes #566
This PR fixes the incorrect raising of
FileNotFoundError
when loading the nox module if it contains module-level file operations on non-existing files.I've moved the
_load_and_exec_nox_module
past theFileNotFoundError
andOSError
exception checks and changed the exceptions it could raise into assert statements as they were all covering internal importlib exceptions that are pretty much fatal.See conversation on issue from this comment onwards for context: #566 (comment)