Hang while collecting; no troubleshooting available?

G’day! pytest --doctest-modules is hanging while collecting ... and I can’t figure out why. I’m pretty sure it’s not #1217 / #2188 because I’m not using unittest.mock.call. I’m trying to crank up all the verbosity, but there’s no log output after the pre-collection pytestdebug output.

$ rm -rf .pytest_cache && rm -f pytestdebug.log && PYTEST_DEBUG=true python -m pytest --doctest-modules --log-level=DEBUG --debug --setup-show --collect-only -vv
  pytest_plugin_registered [hook]
      plugin: <_pytest.config.Config object at 0x7f0b283ec110>
      manager: <_pytest.config.PytestPluginManager object at 0x7f0b2911b590>
…
    pytest_cmdline_preparse [hook]
        config: <_pytest.config.Config object at 0x7f0b283ec110>
        args: ['--doctest-modules', '--log-level=DEBUG', '--debug', '--setup-show', '--collect-only', '-vv']
    finish pytest_cmdline_preparse --> [] [hook]
writing pytestdebug information to /workspace/pytestdebug.log
===== test session starts =====
platform linux -- Python 3.7.4, pytest-3.10.1, py-1.8.0, pluggy-0.13.0 -- /opt/conda/bin/python
using: pytest-3.10.1 pylib-1.8.0
setuptools registered plugins:
  pytest-sanic-1.1.2 at /opt/app/app-py3.7/lib/python3.7/site-packages/pytest_sanic/plugin.py
cachedir: .pytest_cache
rootdir: /workspace, inifile:
plugins: sanic-1.1.2
collecting ... 

If there’s a flag I missed, please let me know and I’ll close the issue with all due haste.

If there’s no way to figure out why collecting is hanging, please take this as a bug or feature issue to add a means to figure this out.

If you suspect it’s pytest-sanic, that strikes me as totally reasonable… and I still need to get the evidence to prove it, so please advise as above.

[xloem]

;P

it would be good if --verbose enumerated the files imported while collecting tests, or threw an error if one timed out. this would change a scenario that needs strace to debug into one that is clear.

but it’s not complicated for somebody to submit a PR adding that when they stumble onto this issue googling it in 3 more years.

[asottile]

--full-trace + ^C might also be helpful