QmlRegisterType object's signal slot connections crashes when giving more than 2 argguments with signal.

I need to send multiple arguments from cpp to qml with signal. I have a qmlRegisterType class which named "myqmlobject".  When I emit mysignal with 2 arguments like

emit mysignal(myString, myInteger);

I can handle this signal with

Connections {
    target: myObject
    function onMysignal(myString, myInteger)
    {
        console.log("it works");
    } 
}

this qml codes.

But when I try to send 3 or more arguments with signal application crashes.

I send basic example application which reproduce this crash.