[#MVU] Updating model crashes on net8.0-windows10.0.19041 but works fine on net8.0-desktop #2394

kucint · 2024-06-26T07:22:38Z

kucint
Jun 26, 2024

I have created very simple app that presents a list of Items in an ItemsRepeater.
All works fine on net8.0-desktop but on net8.0-windows10.0.19041 the app constantly crashes when MainPageModel.AddItem() method is called.

Model:

internal record Item(string Text, Brush Brush);

internal partial record MainPageModel
{
  public IListState<Item> Items => ListState<Item>.Value(this, () =>
  [
      new Item("A", new SolidColorBrush(Colors.DeepSkyBlue)),
      new Item("B", new SolidColorBrush(Colors.DarkOrchid)),
      new Item("C", new SolidColorBrush(Colors.DarkOrange)),
  ]);
  
  public async ValueTask AddItem()
  {
      await Items.Update(items => items.Add(GetRandomItem()), CancellationToken.None).ConfigureAwait(true); // crashes
  }
}

View:

new ItemsRepeater()
.ItemsSource(() => vm.Items)
.Layout(new StackLayout())
.ItemTemplate<Item>(item => GetItemView(item)),
 new Button()
 .Content("Add item")
 .Command(() => vm.AddItem)


private static TextBlock GetItemView(Item item) => new TextBlock()
    .Text(() => item.Text)
    .Foreground(() => item.Brush);

Note that the App crashes differently cross many executions which suggests some concurrency issue.
Note that another concurrency issue is as well reported in #2349. Maybe both are related?

09:12:57:390 Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
09:12:57:390 Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
09:13:00:252 Exception thrown: 'System.Runtime.InteropServices.COMException' in WinRT.Runtime.dll
09:13:00:252 An exception of type 'System.Runtime.InteropServices.COMException' occurred in WinRT.Runtime.dll but was not handled in user code

repro: IListState.Update.crashes.zip