CI: Ensure test coverage for -DASSERT_PARALLEL_CALLBACKS

Author: bonachea

.github/workflows/build.yml

@@ -128,4 +128,9 @@ jobs:
         ( set +e ; fpm run  --example false-assertion  ${FPM_FLAGS} --flag "${{ matrix.EXTRA_FLAGS }}" ; test $? = $ERROR_STOP_CODE )
         ( set +e ; fpm run  --example invoke-via-macro ${FPM_FLAGS} --flag "${{ matrix.EXTRA_FLAGS }}" ; test $? = $ERROR_STOP_CODE )
 
-
+    - name: Test Assertions w/ Parallel Callbacks
+      env:
+        FPM_FLAGS: ${{ env.FPM_FLAGS }} --flag -DASSERTIONS --flag -DASSERT_MULTI_IMAGE --flag -DASSERT_PARALLEL_CALLBACKS
+      run: |
+        set -x
+        ( set +e ; fpm run  --example false-assertion  ${FPM_FLAGS} --flag "${{ matrix.EXTRA_FLAGS }}" ; test $? = $ERROR_STOP_CODE )