{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"assert!(result.is_err());"}]}
    assert!(result.is_err());
    let result = split_extern_opt(&early_dcx, unstable_opts, "priv:noprelude:foo=libbar.rlib");
    let _ = result.map_err(|e| e.cancel());