In file included from ../../flutter/display_list/display_list_builder.h:8:
../../flutter/display_list/display_list.h:158:3: error: definition of implicit copy assignment operator for 'SaveLayerOptions' is deprecated because it has a user-declared copy constructor [-Werror,-Wdeprecated-copy]
  SaveLayerOptions(const SaveLayerOptions& options) : flags_(options.flags_) {}
  ^
../../flutter/display_list/display_list_builder.cc:283:21: note: in implicit copy assignment operator for 'flutter::SaveLayerOptions' first required here
        op->options = op->options.with_can_distribute_opacity();