Possible reapter bug

[raketmus]

Hello i am trying to use mchart(A QML wrapper for chart.js).
Now it needs to be passed a QList for the data i have multiple charts made by a reapter so i have stacked qlists like so:
QList<QList<qreal>> Issue is when i use this i do the following

Repeater
{
    id: repeater
    model: 4
    Page
    {
         Component.onCompleted: {
                  console.log(index)
         }
         MChart
         {
              width: parent.width + 60
              height: 300
              y: 290
              anchors.horizontalCenter: parent.horizontalCenter
     
              type: MChart.Type.Line
              silent: true
              labels: serial.labels[index]
     
              data:
              [
                   MDataset
                   {
                        values: serial.chartData[index]
                        fillColor: "#28bcd7"
                        lineColor: "#4328d7"
                        pointColor: "#2864d7"
                   }
              ]
    }
}
       

serial.chartData is QList<QVarient> where the QVarient is a QList<qreal>.
serial.labels is QList<QVarient> where the QVarient is a QList<QString>.
I get the error ReferenceError: index is not defined at serial.labels[index]
how can this be i can use index before this, but when i use it here it doesn't work.
Is this a bug or am i doing something wrong?