Pyright: Type inference failure in `sorted`

[tamuhey]

Describe the bug

from typing import List

a: List[str] = ["a", "bc"]
b: List[str] = sorted(a, key=len)

Causes an error:

4:16 - error: Expression of type 'List[Union[str, Sized]]' cannot be assigned to declared type 'List[str]'
  Type 'Sized' cannot be assigned to type 'str'
    'Sized' is incompatible with 'str'

version

1.0.81

[erictraut]

Thanks for the bug report. I'm able to repro the problem, and I'll look into.

[erictraut]

The fix will be in the next published version of pyright.

[erictraut]

This is fixed in version 1.0.83, which I just published.