{"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
    let sig = ty::Binder::bind_with_vars(sig, bound_vars);
    let sig = tcx.mk_fn_sig(inputs, output, false, safety, ExternAbi::Rust);
    equate_intrinsic_type(tcx, span, intrinsic_id, n_tps, n_lts, n_cts, sig)