Union of dicts fail

[socketpair]

https://mypy-play.net/?mypy=latest&python=3.9&gist=6770a34c37170183d0fefe8b1444aa27

from typing import Dict, Union

def fun() -> Union[Dict[str, int], Dict[int, float]]:
    return {}

error: Incompatible return value type (got "Dict[<nothing>, <nothing>]", expected "Union[Dict[str, int], Dict[int, float]]")

[socketpair]

I guess, {} should be Dict[Any, Any] and not Dict[<nothing>, <nothing>]

[srittau]

There is prior discussion in python/typeshed#4846 and a PR in python/typeshed#4987.

[socketpair]

Not reproduced anymore, so closing.