jsevaluator does not close used iterators automatically

function doSelect() {

    var q =  select * from `travel-sample`.inventory.route a;

    var res = [];

    for (const doc of q) {

        var q1 = insert into b2 values(UUID(), "1");

    }

    return res;

}

  {

    "code": 10109,

    "msg": "Error executing function 'test' (test:doSelect)",

    "reason": {

      "details": {

        "Code": "        q1 = N1QL('insert into b2 values(UUID(), \\\"1\\\");', {}, true);",

        "Exception": " Active iterator limit of 10 reached. Close unused iterators and retry",

        "Location": "functions/test.js:5",

        "Stack": "   at doSelect (functions/test.js:5:14)"

      },

      "type": "Exceptions from JS code"

    }

  }

function doSelect() {

    var q =  select * from `travel-sample`.inventory.route a;

    var res = [];

    for (const doc of q) {

        var q1 = insert into b2 values(UUID(), "1");

        q1.close()

    }

    return res;

}