mypy confused by omitted optional argument before kwargs

[jeffkaufman]

When I give mypy:

def foo(bar: bool = False, **kwargs: str) -> None:
    print('foo(bar=%s, **kwargs=%s)' % (bar, kwargs))

foo(**{'a': 'a', 'b': 'b'})

I get:

4: error: Argument 1 to "foo" has incompatible type **Dict[str, str]; expected "bool"

On the other hand, these work fine:

foo(a='a', b='b')
foo(a='a', b='b', bar=True)

Running the code, python has no objection to it:

$ python ~/tmp.py
foo(bar=False, **kwargs={'a': 'a', 'b': 'b'})

This is with:

$ python --version
Python 3.6.0
$ mypy --version
mypy 0.470```

[gvanrossum]

I believe this is a duplicate of #1969. @jeffkaufman If you agree can you please close your own issue?

[jeffkaufman]

Thanks, that does look the same.