Non Image item as OpacityMask::maskSource

[kostyamaslyuk]

Following code does not show anything on desktop (windows 7 x64, Qt 5.1):

@import QtQuick 2.0
import QtGraphicalEffects 1.0

Item {
width: 300; height: 300

Rectangle {
    id: source

    anchors.fill: parent
    color: 'red'
    visible: false
}

Rectangle {
    id: mask

    gradient: Gradient {
        GradientStop { position: 0.0; color: 'black' }
        GradientStop { position: 0.5; color: 'transparent' }
        GradientStop { position: 1.0; color: 'white' }
    }
    visible: false
}

OpacityMask {
    anchors.fill: parent
    source: source
    maskSource: mask
}

}@

I expect it to show red gradient dissolving to the sides. If i put Image as maskSource it will work as expected. On android device, similar code as above works as expected.

It seem to me as malfunction.