OSX: The main python script fails, although specific components work

[mj-xmr]

In the main directory there's a symlink soloptxmr.py, that points to src/prod.py. The script calls a few Python modules, ultimately to call the opti executable in the build/default-static-release/bin/ directory by default.

Even though calling the individual components that constitute the src/prod.py goes fine, the script hangs the GitHub CI machines. See the workaround in util/ci.sh:

python3 src/tests.py
# Now test unpickling:
python3 src/tests.py

./ci-default -o "VERBOSE_FUNCTIONS=OFF" # <-- it might be helpful to set it to ON

echo "Testing the entire production chain:"
if [ "$(uname)" == "Linux" ]; then
        python3 src/prod.py
else
        # TODO: Mac OSX suffers from an endless loop (?) in prod.py
        #python3 src/prod.py
        cd build/default-static-release/bin/
        ./opti
fi

A good approach would be to run the script in Python's debug mode and pause the execution to see where it hung.

It can be done either by a Mac owner or by somebody (like me) through renting an OSX terminal from a service like https://www.vpsserver.com .