message: Initialize shape_map field in constant folding options.
diff: @@ -33,7 +33,7 @@ struct ConstantFoldingOptions {
  // vector of the (potentially partially-known) shapes of its
  // outputs.
  const std::unordered_map<const Node*, std::vector<PartialTensorShape>>*
  - shape_map; // not owned
  + shape_map = nullptr; // not owned
  };
  // Perform constant folding optimization on "graph".
  