diff --git a/mlir/lib/ExecutionEngine/SparseTensorUtils.cpp b/mlir/lib/ExecutionEngine/SparseTensorUtils.cpp
--- a/mlir/lib/ExecutionEngine/SparseTensorUtils.cpp
+++ b/mlir/lib/ExecutionEngine/SparseTensorUtils.cpp
@@ -934,8 +934,11 @@
         // when adding support for multiple compressed dimensions or
         // for dense-after-compressed.
         break;
+      default:
+        FATAL("unsupported dimension level type");
       }
       sz = checkedMul(sz, dimSizes[r]);
+
     }
   }