Improve crash handling in type-ratchet script #33
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Before this change, we were failing to catch crashes from mypy plugins, which can cause mypy to crash with a return-code of 1.
Frustratingly, return-code 1 is what mypy returns when it finds type errors.
This change tries to work out if mypy failed in an expected manner by reading the last line of mypy's output and checking to see if it matches the standard error format: "Found X errors ...".