debug

Author: jharlow-intel

.github/workflows/build-with-clang.yml

@@ -93,8 +93,29 @@ jobs:
       - name: Run mkl_umath tests
         run: |
           source ${{ env.ONEAPI_ROOT }}/setvars.sh
+          ulimit -c unlimited
           pip install pytest
-          # mkl_umath cannot be installed in editable mode, we need
-          # to change directory before importing it and running tests
           cd ..
-          python -X faulthandler -m pytest -q --pyargs mkl_umath/mkl_umath/tests -k "not patch"
+          # First a minimal import to see if pure import crashes
+          python -X faulthandler -c "import numpy, mkl_umath; print('import-only OK')"
+          # Run tests normally; expect segfault
+          python -X faulthandler -m pytest -q --pyargs mkl_umath/mkl_umath/tests || echo "pytest exit code=$?"
+          COREFILE=$(ls core* 2>/dev/null | head -1 || true)
+          if [ -f "$COREFILE" ]; then
+            echo "Core file: $COREFILE"
+            gdb -batch -ex "bt full" -ex "info threads" python "$COREFILE"
+          else
+            echo "No core produced"
+          fi
+          # Retry with MKL mitigations to confirm cause
+          export MKL_DISABLE_FAST_MM=1
+          export MKL_THREADING_LAYER=SEQUENTIAL
+          python -X faulthandler -c "import numpy, mkl_umath; print('sequential + fast_mm disabled import OK')"
+          python -X faulthandler -m pytest -q --pyargs mkl_umath/mkl_umath/tests || echo "pytest (sequential) exit code=$?"
+          # Show loaded modules
+          python - <<'EOF'
+import sys, mkl_umath, numpy
+print("Loaded mkl_umath from:", mkl_umath.__file__)
+print("MKL_THREADING_LAYER =", __import__('os').environ.get('MKL_THREADING_LAYER'))
+print("Has _ufuncs:", '_ufuncs' in dir(mkl_umath))
+EOF