{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"promoted.local_decls[RETURN_PLACE]"}]}
                promoted.local_decls[RETURN_PLACE] = LocalDecl::new(ty, span);
                promoted.span = span;
                let args = tcx.erase_regions(GenericArgs::identity_for_item(tcx, def));