{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":".chain(iter::repeat_with(||"}]}
                .chain(iter::repeat_with(|| Err("proc-macro-srv is not running".into())));
                .map(|res| res.as_ref().map_err(|e| e.to_string()))
            for (client, paths) in proc_macro_clients.zip(paths) {