Missing return statement after a call to quit()

I am getting "Missing return statement" with the following:

def foo() -> str:
try:
with open('bar.txt') as file:
return ''
except FileNotFoundError as error:
print(error)
quit()

Is this correct behaviour? (MyPy 0.670, Python 3.7.1)

This is a typeshed problem. quit() must be annotated with NoReturn, please open an issue there.

Ok. Will do. Thanks.

This has been fixed in typeshed now: #2912 via #2915.

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