`test_cfmodel.py` cause segmentation fault on MacOS

[pat-alt]

Hi there,

I've been following the contributor's guide and started off by running tests locally before modifying the code in any way. I'm getting the following error:

(env) (base)  ~/Documents/code/CARLA/ [main] make test
env/bin/python -m pytest test/*
========================================================================================== test session starts ===========================================================================================
platform darwin -- Python 3.7.10, pytest-6.1.2, py-1.11.0, pluggy-0.13.1
rootdir: /Users/FA31DU/Documents/code/CARLA
collected 117 items                                                                                                                                                                                      

test/test_api.py ....                                                                                                                                                                              [  3%]
test/test_autoencoder.py .....                                                                                                                                                                     [  7%]
test/test_benchmark.py .......                                                                                                                                                                     [ 13%]
test/test_causal_recourse.py .                                                                                                                                                                     [ 14%]
test/test_cfmodel.py Fatal Python error: Segmentation fault

Thread 0xFatal Python error: make: *** [test] Segmentation fault: 11

I'm using MacOS and see you're running CI on Ubuntu so it might just be OS-related. But thought I'd flag anyway and check if you've come across this in the past?

[JohanvandenHeuvel]

I have never seen that before.

Did you try to isolate the error? Maybe if it's one particular method I can get an idea where the problem might be coming from.

If it is OS-related, I can't reproduce it and that would make it difficult to fix myself.