Incompatible return value type (got "function", expected "Callable[..., Any]")

[gcaria]

import glob
from typing import Callable, List


def fun1(b: str) -> List[str]:
    return ["a", "b"] + [b]


def fun(a: str) -> Callable:
    return fun1 if a == "hello" else glob.glob

Running mypy (v 0.931) on this file gives:

error: Incompatible return value type (got "function", expected "Callable[..., Any]")  [return-value]

Crossposting from stackoverflow where an answer suggests that this problem is limited to using the ternary operator, but a bug nevertheless.

[erictraut]

This can be added to the increasingly long list of issues caused by mypy's use of join rather than union. See #12009.

[AlexWaygood]

I'm closing this as a duplicate of #10740, as it's nearly exactly the same behaviour on display