Hello,
L4Re::Util::Dataspace_svr's copy functionality is not very flexible. It only works for local dataspaces which I believe is insufficient.
The problem is the "if (!src_cap.id_received())" construct in the L4Re::Dataspace_::Copy case in the dispatch method. Imo this should be something comparable to the validate_ds() method used in region_mapping_svr.
Daniel