Using the virtualenv py3 leads to a seg fault, but system py3 works...

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: ci
+on: [push, pull_request]
+jobs:
+  testing:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        python-version: [3.6]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: install dependencies
+        run: pip install -U pip coveralls
+      - name: build native code
+        run: make build
+      - name: Run tests!
+        run: |
+          ulimit -c unlimited
+          /usr/bin/python3 -m unittest discover -s tests/
+      - name: Log coverage
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: coveralls