{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"for"}]}
    for (predicate, cause) in &typeck_results.coroutine_stalled_predicates {
    let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
        ocx.register_obligation(Obligation::new(tcx, cause.clone(), param_env, *predicate));