Application.UnhandledException strips Message and StackTrace

Describe the bug

When the Microsoft.UI.Xaml.Application.UnhandledException event is raised, the exception it captures has no stack trace, and the message has reverted to the default message for the exception. This makes it very difficult to determine the cause of an unhandled exception.

Steps to reproduce the bug

Microsoft.UI.Xaml.Application.Current.UnhandledException += (sender, e) => {
    var stackTrace = e.Exception.StackTrace;   // set a breakpoint and examine here
}

Then go throw an exception somewhere, such as in a button click. Set a breakpoint and debug the app.

Expected behavior

The stack trace should be populated. Instead, it is null.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.0.3

Windows app type

• UWP
• Win32

Device form factor

Desktop

Windows version

Windows 11 (21H2): Build 22000

Additional context

Testing from within VS 2022 17.3.0 Preview 1.1 from within a MAUI app.

[mattjohnsonpint]

FYI - I also tried in a UWP application and the exception comes through with all properties intact, so the issue is specific for WinUI 3.

[Scottj1s]

App.UnhandledException fix will be available in Windows App SDK 1.2 Preview 2.