Repeater delegates have no parent when their Component.onCompleted is called

import QtQuick 2.0
Rectangle {
    width: 400; height: 600

    Row {
        anchors.centerIn: parent
        spacing: 3

        Rectangle {
            width: 50; height: 50; color: "green"
            Component.onCompleted: {
                print(parent.toString());
            }
        }

        Loader {
            sourceComponent: Rectangle {
                width: 50; height: 50; color: "yellow"
                Component.onCompleted: {
                    print(parent.toString());
                }
            }
        }

        Repeater {
            model: 3
            delegate: Rectangle {
                width: 50; height: 50; color: "blue"
                Component.onCompleted: {
                    print(parent.toString());
                }
            }
        }
    }
}