{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"NiceRegionError::new_from_span(&infer_err,"}]}
                NiceRegionError::new_from_span(&infer_err, self.mir_def_id(), cause.span, o, f);
            let nice =
            if let Some(diag) = nice.try_report_from_nll() {