ci: add smoke test step before benchmarks to show pyhl run errors

Signed-off-by: danbugs <danilochiarlone@gmail.com>

Author: danbugs

.github/workflows/benchmarks.yml

@@ -170,6 +170,15 @@ jobs:
         if: steps.kvm_check.outputs.available == 'true'
         run: pyhl setup --from src-dir --force
 
+      - name: "Smoke: verify pyhl run works"
+        if: steps.kvm_check.outputs.available == 'true'
+        run: |
+          echo "--- snapshot and system info ---"
+          ls -lh .pyhl/
+          free -h
+          echo "--- smoke test ---"
+          pyhl run -c "print('smoke ok')" || { echo "FAIL: pyhl run exited $?"; exit 1; }
+
       - name: "Perf: hello world (15 runs)"
         if: steps.kvm_check.outputs.available == 'true'
         run: |