{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
    let polonius_output = polonius_facts.as_ref().and_then(|polonius_facts| {
    // If requested: dump NLL facts, and run legacy polonius analysis.
        if infcx.tcx.sess.opts.unstable_opts.nll_facts {