{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"err.span_label(self.r.def_span(def_id),"}]}
                err.span_label(self.r.def_span(def_id), format!("`{path_str}` defined here"));
                let def_id = self.r.tcx.parent(ctor_def_id);
                let fields = self.r.field_idents(def_id).map_or_else(