Doc build failing

[soxofaan]

Since ae24926 the docs fail to build, with

Run python -m sphinx -b html docs build
  python -m sphinx -b html docs build
  shell: /usr/bin/bash -e {0}
  env:
    pythonLocation: /opt/hostedtoolcache/Python/3.8.15/x64
    LD_LIBRARY_PATH: /opt/hostedtoolcache/Python/3.8.15/x64/lib
Running Sphinx v5.3.0
WARNING: Invalid configuration value found: 'language = None'. Update your configuration to a valid language code. Falling back to 'en' (English).
myst v0.18.1: MdParserConfig(commonmark_only=False, gfm_only=False, enable_extensions=[], disable_syntax=[], all_links_external=False, url_schemes=('http', 'https', 'mailto', 'ftp'), ref_domains=None, highlight_code_blocks=True, number_code_blocks=[], title_to_header=False, heading_anchors=None, heading_slug_func=None, footnote_transition=True, words_per_minute=200, sub_delimiters=('{', '}'), linkify_fuzzy_links=True, dmath_allow_labels=True, dmath_allow_space=True, dmath_allow_digits=True, dmath_double_inline=False, update_mathjax=True, mathjax_classes='tex2jax_process|mathjax_process|math|output_area')
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 23 source files that are out of date
updating environment: [new config] 23 added, 0 changed, 0 removed
reading sources... [  4%] api

Extension error (sphinx_autodoc_typehints):
Handler <function process_docstring at 0x7f908c7e0430> for event 'autodoc-process-docstring' threw an exception (exception: )
Error: Process completed with exit code 2.

Unfortunately no clear exception or stack trace to figure out what is going wrong

[soxofaan]

I also can not reproduce locally so far

[soxofaan]

I can reproduce now locally when upgrading to latest sphinx-autodoc-typehints, which is version 1.21.4

downgrading to 1.21.3 does not have this issue

[soxofaan]

This seems to be the issue (or at least related): tox-dev/sphinx-autodoc-typehints#302

[soxofaan]

build works again

closing for now