{"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":".unwrap();"}]}
            .unwrap();
        compute_match_usefulness(arms.as_slice(), ty, PlaceValidity::ValidOnly, usize::MAX, false)
    report.arm_intersections.into_iter().map(|bitset| bitset.iter().collect()).collect()