{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx| "tail-call-checking `{}`", tcx.def_path_str(key) }
    query check_tail_calls(key: LocalDefId) -> Result<(), rustc_errors::ErrorGuaranteed> {
        return_result_from_ensure_ok