Conditional breakpoints in qml do not work with properties

I created a new project with the wizard using Qt 5.5 and pasted this:

    id: root
    property int someProp: 42

    Timer {
        interval: 3000
        running: true
        repeat: true
        onTriggered: {
            var anything = 7;
            console.log("Completed", root.someProp);
        }
    }

I created a breakpoint on the console.log line and it is hit.

If I edit the breakpoint and set the condition to 'root.someProp == 42', the breakpoint is not hit, and is ignored. A condition on 'anything == 7' does work.