CustomMaterial passes property doesn't work with non-inlined passes

E.g. in custom material example, if I define the passes like this, the object fails to render:

    Pass {
        id: thePass
        shaders: [ vertShader, fragShader ]
    }

    passes: [thePass] 

Error in trace: [400] qrc:/ExampleMaterial.qml:82:5: Unable to assign QList<QObject*> to QQmlListProperty<QQuick3DShaderUtilsRenderPass>

It's necessary to be able to assing non-inlined passes for QDS.