Instantiator in QtQuick Controls gives error when onObjectRemoved is called.

import QtQuick 2.1
import QtQuick.Controls 1.0

Column {
    width: 480
    height: 360

    Component {
        id: column
        TableViewColumn { }
    }

    Instantiator {
        model: 2
        TableViewColumn {
            title: index
        }
        onObjectAdded: table.insertColumn(index, object)
        onObjectRemoved: table.removeColumn(index, object)
    }

    TableView {
        id: table
        model: 100
        width: parent.width
        height: parent.height - row.height
    }

    Row {
        id: row
        Button {
            text: "Add"
            onClicked: table.addColumn(column.createObject(table, {title: table.columnCount}))
        }
        Button {
            text: "Remove"
            enabled: table.columnCount > 0
            onClicked: table.removeColumn(table.columnCount-1)
        }
    }
}