debug(ci): capture gdb backtrace on OverlapCheck segfault

.github/workflows/build-test.yml

@@ -12,37 +12,28 @@ on:
 
 jobs:
   build-and-test:
-    runs-on: self-hosted
-    container:
-      image: registry.cern.ch/ship/gha-runner:latest
-      volumes:
-        - /cvmfs/sft.cern.ch:/cvmfs/sft.cern.ch
-        - /cvmfs/ship-nightlies.cern.ch:/cvmfs/ship-nightlies.cern.ch
-        - /cvmfs/geant4.cern.ch:/cvmfs/geant4.cern.ch
-
-    env:
-      WORK_DIR: /cvmfs/ship-nightlies.cern.ch/GeoModel/sw/
-
+    runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v6
+      - uses: actions/checkout@v6
 
-      - name: Configure
-        run: |
-          source /cvmfs/sft.cern.ch/lcg/views/LCG_109/x86_64-el9-gcc15-opt/setup.sh
-          source /cvmfs/ship-nightlies.cern.ch/GeoModel/sw/slc9_x86-64/GeoModel/6.24.0-local2/etc/profile.d/init.sh
-          cmake -S . -B build \
-            -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-            -DCMAKE_PREFIX_PATH="/cvmfs/ship-nightlies.cern.ch/GeoModel/sw/slc9_x86-64/GeoModel/6.24.0-local2;/cvmfs/sft.cern.ch/lcg/releases/qt6/6.8.3-4d4f0/x86_64-el9-gcc15-opt"
+      - uses: prefix-dev/setup-pixi@v0.9.6
+        with:
+          cache: true
 
-      - name: Build
-        run: |
-          source /cvmfs/sft.cern.ch/lcg/views/LCG_109/x86_64-el9-gcc15-opt/setup.sh
-          source /cvmfs/ship-nightlies.cern.ch/GeoModel/sw/slc9_x86-64/GeoModel/6.24.0-local2/etc/profile.d/init.sh
-          cmake --build build -j$(nproc)
+      - name: Build and test
+        run: pixi run test
 
-      - name: Test
+      - name: GDB backtrace of build_geometry on failure
+        if: failure()
+        continue-on-error: true
         run: |
-          source /cvmfs/sft.cern.ch/lcg/views/LCG_109/x86_64-el9-gcc15-opt/setup.sh
-          source /cvmfs/ship-nightlies.cern.ch/GeoModel/sw/slc9_x86-64/GeoModel/6.24.0-local2/etc/profile.d/init.sh
-          ctest --test-dir build --output-on-failure
+          pixi run -- bash -c '
+            cd build
+            rm -f ship_test_overlap.db
+            gdb --batch \
+              --ex "set pagination off" \
+              --ex "set print frame-arguments all" \
+              --ex run \
+              --ex "thread apply all bt full" \
+              --args apps/build_geometry ship_test_overlap.db
+          '