The described behavior happens since 0.3.3. It might be related to #10340

It is triggered throughout my SQLAlchemy models in cases where a model is not defined yet while used in a type annotation

Minimal repro:

from __future__ import annotations

from sqlalchemy.orm import DeclarativeBase, Mapped


class Base(DeclarativeBase):
    some_mapping: Mapped[list[Bar]] | None = None # F821 Undefined name `Bar`
    simplified: list[Bar] | None = None # F821 Undefined name `Bar`


class Bar:
    pass

I can only trigger the error when inheriting from DeclarativeBase. Without this inheritance or when inheriting from another class, things are fine.