[TIMOB-27534] Titanium.UI.iPad.Popover sample code crashes in SDK 8.2.1.GA.

var win = Ti.UI.createWindow({backgroundColor: 'white'});

var button = Ti.UI.createButton({title: 'Open Popover!'});
button.addEventListener('click', function(e){
    popover.show({ view: button });
})
win.add(button);

var rightButton = Ti.UI.createButton({title: 'Robin'});
rightButton.addEventListener('click', function(e){
    alert("But green's the color of spring.");
});

var contentWindow = Ti.UI.createWindow({
    rightNavButton: rightButton,
    title: 'Kermit'
});
contentWindow.add(Ti.UI.createLabel({text: "It's not easy being green."}));

var popover = Ti.UI.iPad.createPopover({
    backgroundColor: 'green',
    contentView: Ti.UI.createNavigationWindow({
        width: 250,
        height: 100,
        window: contentWindow
    })
});

win.open();