Using a Rectangle as source gives binding loop detected + errors

Hi,

When i'm trying to use one of the quite cool effects from http://qt-project.org/doc/qt-5.0/qtgraphicaleffects/qmlmodule-qtgraphicaleffects1-qtgraphicaleffects-1-0.html on a Rectangle element then i'm getting binding loop errors.

Example snippet:

import QtQuick 2.0
import QtQuick.Particles 2.0
import QtGraphicalEffects 1.0

Rectangle {
width: 800
height: 600
color: "black"

Rectangle

{ id: dest width: 200 height: 200 color: "blue" }

Rectangle

{ id: source width: 200 height: 200 color: "red" }

Blend

{ anchors.fill: source source: source foregroundSource: dest }

}

But there is more. If i try to do the http://qt-project.org/doc/qt-5.0/qtgraphicaleffects/qml-qtgraphicaleffects1-thresholdmask.html effect, set an image as "maskSource" and a rectangle as "source" then it doesn't work.

Till here the errors are the same for both issues:
file:///F:/Qt/Qt5.0.0/5.0.0/msvc2010/qml/QtGraphicalEffects/ThresholdMask.qml:182:5: QML SourceProxy: Binding loop detected for property "output"
file:///F:/Qt/Qt5.0.0/5.0.0/msvc2010/qml/QtGraphicalEffects/ThresholdMask.qml:177:5: QML SourceProxy: Binding loop detected for property "output"

But in the blend case the output is correct. In the Mask case the output isn't. Now if i "hackfix" this issue by opening "ThresholdMask.qml" and changing the line:
property variant source: sourceProxy.output
to
property variant source: rootItem.source

then the effect works just as i would expect it to work, but my console gets spammed with one message:
ShaderEffect: source or provider missing when binding textures

If you fix the binding loop the next issue will likely be:
ShaderEffect: source or provider missing when binding textures