{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"forward_ty_ban_rib.bindings.insert(Ident::with_dummy_span(kw::SelfUpper),"}]}
            forward_ty_ban_rib.bindings.insert(Ident::with_dummy_span(kw::SelfUpper), Res::Err);
            // (`Some` if + only if we are in ADT's generics.)
        }