{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
        let previous_value = replace(&mut self.diag_metadata.current_where_predicate, Some(p));
        debug!("visit_where_predicate {:?}", p);
        self.with_lifetime_rib(LifetimeRibKind::AnonymousReportError, |this| {