message: Fix potential invalid iterator access
diff: @@ -570,6 +570,7 @@ Status GraphTypeTopologyView::InitializeFromGraph(
  input_type_attr.DebugString(),
  " in node ", input_node.name());
  }
  + continue;
  }
  int input_node_type_idx = it2->second;
  fanins_[node_type_idx].push_back(input_node_type_idx);
  