Tuple in ternary expression treated as object

[pdeblanc]

When checking this code in mypy 0.670:

from typing import Union


a: Union[tuple, int] = 3
b = (a,) if isinstance(a, int) else a
reveal_type(b)  # builtins.object

The inferred type of b is builtins.object. It should be some kind of tuple. I believe this example is minimal in that:

1. It works fine if I use list instead of tuple
2. It works fine if I replace the ternary expression with if/then statements

[emmatyping]

Hi, this is a duplicate of #4975