{"ast_node_type":"other","tokens":[{"end":17,"kind":"keyword","start":0,"text":"}"}]}
                }
                    _ => span_bug!(self.cur_span(), "tagged layout for non-adt non-coroutine"),
                .ok_or_else(|| err_ub!(InvalidTag(Scalar::from_uint(tag_bits, tag_layout.size))))?;