sphinx-autodoc-typehint bug reproducer

conf.py

import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent.parent))

extensions = [
    "sphinx.ext.autodoc",
    "sphinx.ext.intersphinx",
    "sphinx_autodoc_typehints",
]

intersphinx_mapping = {
    "python": ("https://docs.python.org/3", None),
}

project = "repro"

example.py

from typing import Any


def my_function(data: dict[str, Any]) -> dict[str, Any]:
    """Example function.

    Args:
        data: Some data.
    """
    return data

index.rst

example

.. autofunction:: example.my_function

pyproject.toml

[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"

[project]
name = "repro"
version = "0.1.0"
requires-python = ">=3.12"
dependencies = [
    "sphinx~=9.1",
    "sphinx-autodoc-typehints==3.9.2",
]

[tool.setuptools.packages.find]
where = ["."]
include = ["example*"]