diff --git a/mlir/lib/IR/Operation.cpp b/mlir/lib/IR/Operation.cpp
--- a/mlir/lib/IR/Operation.cpp
+++ b/mlir/lib/IR/Operation.cpp
@@ -174,6 +174,9 @@
       resultType = resultTypes.front();
     else
       resultType = TupleType::get(resultTypes, location->getContext());
+    if (!resultType)
+      llvm::report_fatal_error(
+          "Building an Operation with invalid/empty result Type");
   }
 }