{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"debug!(\"check_pat_ref:"}]}
                        debug!("check_pat_ref: demanding {:?} = {:?}", expected, ref_ty);
                        let ref_ty = self.new_ref_ty(pat.span, pat_mutbl, inner_ty);
                        let err = self.demand_eqtype_pat_diag(