Use gdb to get a backtrace of the segfault

.github/workflows/unit-tests.yml

@@ -49,7 +49,11 @@ jobs:
         run: |
           /sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -screen 0 1920x1200x24 -ac +extension GLX
 
+      - name: Install gdb
+        run: sudo apt-get update && sudo apt-get install -y gdb
+
       - name: pytest
         run: |
-          poetry run pytest
+          gdb --batch --quiet -ex r -ex "thread apply all bt" --args "$(readlink -f $(which python3))" -m pytest -p no:faulthandler -x river/drift/binary/hddm_w.py
+          # poetry run pytest
           # poetry run pytest -m "not datasets" --durations=10 -n logical # Run pytest on all logical CPU cores