{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"#[allow(rustc::potential_query_instability)]"}]}
        #[allow(rustc::potential_query_instability)] // Only used from Miri, not queries.
        // need to check for liveness.
        self.memory.dead_alloc_map.retain(|id, _| reachable_allocs.contains(id));