FontLoader in QML Singleton type causes ASSERT: "tdata->isComplete()" in file compiler\qqmlirbuilder.cpp, line 1819

import QtQuick 2.0
pragma Singleton
QtObject {
    property string foo: "foo"

    FontLoader {
        id: theFont
        source: "MyFontFile.ttf"
    }
}

    qmlRegisterSingletonType(QUrl::fromLocalFile(QFileInfo("qml/MyType.qml").absoluteFilePath()), "MyNamespace", 1, 0, "MyTypeSingleton");

import QtQuick 2.0
import MyNamespace 1.0
Text {
    text: MyTypeSingleton.foo
}