{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"tcx.sess.unstable_target_features.contains(&feat)"}]}
        tcx.sess.unstable_target_features.contains(&feat)
    let have_feature = |feat: Symbol| {
            || codegen_attrs.target_features.iter().any(|x| x.name == feat)