iOS The type initializer for 'Microsoft.Maui.Controls.Shapes.Shape' threw an exception. on latest .NET 7

Description

On our project on iOS this code throws an exception using latest .NET 7 Xcode 14.1, Xamarin.iOS 16.0.0.72, VS Version 17.5.0 Preview 1.0

Android and UWP are fine… Maui Sample project also works fine on iOS

builder.UseMauiApp<App>().ConfigureFonts(fonts =>
        {
            fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
            fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
        })
        .UseMauiCommunityToolkit()
        .ConfigureEssentials(essentials =>
        {
            essentials.UseVersionTracking();
        });

Steps to Reproduce

Not sure

Link to public reproduction project repository

NA

Version with bug

7.0 (current)

Last version that worked well

7.0 Release Candidate 2

Affected platforms

iOS

Affected platform versions

iOS 15.4

Did you find any workaround?

No

Relevant log output

{System.TypeInitializationException: The type initializer for 'Microsoft.Maui.Controls.Shapes.Shape' threw an exception.
 ---> System.MissingFieldException: Field not found: Microsoft.Maui.IPropertyMapper`2<Microsoft.Maui.IShapeView, Microsoft.Maui.Handlers.IShapeViewHandler> Microsoft.Maui.Handlers.ShapeViewHandler.Mapper Due to: Could not find field in class
   --- End of inner exception stack trace ---
   at Microsoft.Maui.Controls.Hosting.AppHostBuilderExtensions.RemapForControls(MauiAppBuilder builder)
   at Microsoft.Maui.Controls.Hosting.AppHostBuilderExtensions.SetupDefaults(MauiAppBuilder builder)
   at Microsoft.Maui.Controls.Hosting.AppHostBuilderExtensions.UseMauiApp[App](MauiAppBuilder builder)
   at AssessorApp.MauiProgram.CreateMauiApp() in C:\Users\User\workspace\project\MauiProgram.cs:line 13
   at AssessorApp.AppDelegate.CreateMauiApp() in C:\Users\User\workspace\project\project\Platforms\iOS\AppDelegate.cs:line 16
   at Microsoft.Maui.MauiUIApplicationDelegate.WillFinishLaunching(UIApplication application, NSDictionary launchOptions)
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName)
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass)
   at AssessorApp.Program.Main(String[] args) in C:\Users\User\workspace\project\project\Platforms\iOS\Program.cs:line 15}
    base: {System.SystemException}
    TypeName: "Microsoft.Maui.Controls.Shapes.Shape"

[mancda]

I ran into the same problem today as well.

[rolfbjarne]

It looks like the issue here is if you specify net7.0-ios15.4 as a TFM

I’m not sure if that’s supported. @rolfbjarne thoughts?

Yeah, that probably won’t work.

I’ve filed https://github.com/xamarin/xamarin-macios/issues/16802 to see if we can show a better error message.