LSP: Docstring hover doesn't work for `type` aliases like `TypeAlias`s

[dangotbanned]

Related

I posted this on (#3661 (comment)) a couple weeks ago, but probably should've started with a new issue

Summary

A docstring that follows a TypeAlias is shown on hover

But the docstring is lost when using a type statement

And if you use TypeAliasType, you get multiple docs

Repro

Playground

from typing import TypeAlias, Literal, TypeAliasType

A: TypeAlias = Literal["1", "2"]
"""I have a doc!"""

type B = Literal["1", "2"]
"""So do I, but you cannot see me."""

C = TypeAliasType("C", Literal["1", "2"])
"""I have two docs?"""

B1: TypeAlias = B
# No docs

B2 = TypeAliasType("B2", B)
# No docs

C1: TypeAlias = C
# This has 1 doc now?

C2 = TypeAliasType("C2", C)
# No docs


# ------------------------
# Hover over these guys

A

B

C

B1

B2

C1

C2

Version

ty 0.0.79 (b4cd792 2026-09-07)