timeout not working with %%capture about nbsphinx

[mgeier]

nbsphinx isn't implementing the timeout itself, but it instead uses nbconvert.preprocessors.ExecutePreprocessor:

nbsphinx/src/nbsphinx/__init__.py

Lines 382 to 385 in 78088ab

	pp = nbconvert.preprocessors.ExecutePreprocessor(
	kernel_name=self._kernel_name,
	extra_arguments=self._execute_arguments,
	allow_errors=allow_errors, timeout=timeout)

If you can reproduce the problem directly with that (without involving nbsphinx), you could create an issue at https://github.com/jupyter/nbconvert/issues/, or maybe at https://github.com/jupyter/nbclient/issues/ (which is in turn used by nbconvert).

Once this is solved there, it will automagically also work with nbsphinx (at least I would hope so).

[mgeier]

This may or may not be related: jupyter/nbconvert#1964

[nthiery]

Thanks @mgeier for the connection; I did some more drilling on jupyter/nbconvert#1964.
You may want to try to downgrade jupyter_client to <8.