Fix #8074: napoleon: Crashes during processing C-ext module

[tk0miya]

Feature or Bugfix

• Bugfix

Purpose

• refs: autodoc does not recognize cython_function_or_method #8074
• inspect.getfile() raises TypeError if given object is a C-extension.
  This handles the exception not to be crashed.

[tk0miya]

It confirmed this fixes the error.

FROM python:3.8-slim

RUN apt update; apt install -y build-essential curl git make unzip vim
RUN git clone --single-branch --branch gh-pages https://github.com/McSinyx/palace
RUN pip install palace==0.2.1 Sphinx==3.2.0
RUN apt install -y libjack-dev libpulse-dev libasound-dev
RUN pip install git+https://github.com/tk0miya/sphinx@8074_napoleon_crashes_by_cython
WORKDIR /palace
RUN make html SPHINXOPTS=-T

[keewis]

looks good to me. Sorry for not doing that when I wrote that method. The docs do mention that it raises TypeError for "built-in" objects, but I didn't think that could refer to c-extensions.

[tk0miya]

Thank you for reviewing :-)

[tk0miya]

I noticed I was wrongly merged this into 3.x branch. So I cherry-picked this into 3.2.x branch now.