Application crashes at loading phase when change window size

[Nab0y]

Application crashes at loading phase (splash by default) when the user changes the window size.

    public static Visibility CalculateBackVisibility(Frame frame)
    {
        // by design it is not visible when not applicable
        var cangoback = frame.CanGoBack; // Chash here

Since this time frame still null

[JerryNixon]

Not sure why this would occur. I added.

// in some cases frame may be null, esp. race conditions
if (frame == null)
    return Visibility.Collapsed;

[eloekset]

If others are using "Advanced View States for Windows 10 apps" this bug causes the app to crash on startup because DeviceTrigger.Initialize() tries to get access to Shell.Frame, which is null. Here is a tip to workaround that issue: http://www.codeproject.com/Articles/896974/Advanced-View-States-for-Windows-apps?msg=5147438#xx5147438xx

It would be great if someone could find a way to fix the Shell.Frame = null bug, to avoid similar issues.