Invalid nested PEP 585 syntax with postponed evaluation

[cdce8p]

Environment data

• Language Server version: 2021.2.2
• OS and version: darwin x64
• Python version (and distribution if applicable, e.g. Anaconda): 3.8
• python.analysis.indexing: undefined
• python.analysis.typeCheckingMode: strict

Expected behaviour

PEP 585 syntax in type aliases is invalid in 3.7 / 3.8 even when nested inside Union / Tuple / Dict.

Actual behaviour

No errors

Logs

--

Code Snippet / Additional information

from __future__ import annotations
from typing import Union

Alias1 = Union[list[str], None]
Alias2 = Union[Union[list[int], int]]
Alias3 = Tuple[list[int]]
Alias4 = Dict[str, list[int]]

[erictraut]

Thanks for the bug report. This will be fixed in the next release.

[jakebailey]

This issue has been fixed in version 2021.2.3, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/main/CHANGELOG.md#202123-17-february-2021