CI: Try hooking gdb into failing CI (likely not correct, but lets see...)

Author: seberg

azure-pipelines.yml

@@ -111,8 +111,9 @@ stages:
             cp \$target/include/* /usr/include && \
             python3 -m pip install -r test_requirements.txt && \
             echo CFLAGS \$CFLAGS && \
+            yum install -y gdb && \
             python3 -m pip install -v . && \
-            python3 runtests.py -n --debug-info --mode=full -- -rsx --junitxml=junit/test-results.xml && \
+            gdb --return-child-result --batch --eval-command=run --eval-command=bt --args python3 runtests.py -n --debug-info --mode=full -- -rsx --junitxml=junit/test-results.xml && \
             python3 tools/openblas_support.py --check_version"
       displayName: 'Run 32-bit manylinux2014 Docker Build / Tests'
     - task: PublishTestResults@2