Add bad_server_response_test
diff --git a/examples/cpp/helloworld/greeter_client.cc b/examples/cpp/helloworld/greeter_client.cc
index bf3b63c..12209f3 100644
--- a/examples/cpp/helloworld/greeter_client.cc
+++ b/examples/cpp/helloworld/greeter_client.cc
@@ -72,6 +72,8 @@
     if (status.ok()) {
       return reply.message();
     } else {
+      std::cout << status.error_code() << ": " << status.error_message()
+                << std::endl;
       return "RPC failed";
     }
   }