Unable to create child window for native control host

[rdeusser]

Describe the bug

Basically #8609, except the solution already exists in the project. I’m using Ryujinx and I only get this exception when I enable mods. It’s confusing because it seems like the issue in #8609 has a singular cause, but it appears there’s other ways to make it crop up. Is there a definitive cause for this exception? The stacktrace is incredibly unhelpful because it doesn’t show me anything in Ryujinx outside of ‘BuildAvaloniaApp’. I can post a stacktrace later. I’m on mobile at the moment.

To Reproduce

• Download latest Ryujinx
• Follow their guide on dumping a game you own legitimately (in my case Tears of the Kingdom v1.2.1)
• Find a v1.2.1 mod and enable it
• Start game and it should crash with the exception in the logs Ryujinx writes to disk

Expected behavior

Potentially a crash that has nothing to do with Avalonia, otherwise a working game.

Avalonia version

11.0.10

OS

Windows

Additional context

I’ll add more here later when I can get back to my computer.

[maxkatz6]

We need a proper minimal repro to even try to help with this issue. We don't have dev capacity to investigate Ryujinx source code and repro this issue with a dumped (legitimately) game images.

[TSRBerry]

I can at least provide a stack trace for this issue for now, since a person with this issue uploaded a log in our support channels.

Stack trace

Unhandled exception caught: System.InvalidOperationException: Unable to create child window for native control host. Application manifest with supported OS list might be required.
   at Avalonia.Win32.Win32NativeControlHost.DumbWindow..ctor(Boolean , Nullable`1 )
   at Avalonia.Win32.Win32NativeControlHost.CreateNewAttachment(Func`2)
   at Avalonia.Controls.NativeControlHost.UpdateHost()
   at Avalonia.Controls.NativeControlHost.OnAttachedToVisualTree(VisualTreeAttachmentEventArgs)
   at Avalonia.Visual.OnAttachedToVisualTreeCore(VisualTreeAttachmentEventArgs)
   at Avalonia.Layout.Layoutable.OnAttachedToVisualTreeCore(VisualTreeAttachmentEventArgs)
   at Avalonia.Input.InputElement.OnAttachedToVisualTreeCore(VisualTreeAttachmentEventArgs)
   at Avalonia.Controls.Control.OnAttachedToVisualTreeCore(VisualTreeAttachmentEventArgs)
   at Avalonia.Visual.SetVisualParent(Visual)
   at Avalonia.Visual.SetVisualParent(IList, Visual )
   at Avalonia.Visual.VisualChildrenChanged(Object sender, NotifyCollectionChangedEventArgs e)
   at Avalonia.Collections.AvaloniaList`1.Add(T)
   at Avalonia.Controls.Presenters.ContentPresenter.UpdateChild(Object)
   at Avalonia.Controls.Presenters.ContentPresenter.UpdateChild()
   at Avalonia.Controls.Presenters.ContentPresenter.ApplyTemplate()
   at Avalonia.Layout.Layoutable.MeasureCore(Size)
   at Avalonia.Layout.Layoutable.Measure(Size)
   at Avalonia.Layout.Layoutable.MeasureOverride(Size)
   at Avalonia.Layout.Layoutable.MeasureCore(Size)
   at Avalonia.Layout.Layoutable.Measure(Size)
   at Avalonia.Layout.LayoutHelper.MeasureChild(Layoutable, Size, Thickness, Thickness)
   at Avalonia.Controls.Presenters.ContentPresenter.MeasureOverride(Size)
   at Avalonia.Layout.Layoutable.MeasureCore(Size)
   at Avalonia.Layout.Layoutable.Measure(Size)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable)
   at Avalonia.Layout.LayoutManager.ExecuteMeasurePass()
   at Avalonia.Layout.LayoutManager.InnerLayoutPass()
   at Avalonia.Layout.LayoutManager.ExecuteLayoutPass()
   at Avalonia.Layout.LayoutManager.ExecuteQueuedLayoutPass()
   at Avalonia.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at Avalonia.Media.MediaContext.RenderCore()
   at Avalonia.Media.MediaContext.Render()
   at Avalonia.Threading.DispatcherOperation.InvokeCore()
   at Avalonia.Threading.DispatcherOperation.Execute()
   at Avalonia.Threading.Dispatcher.ExecuteJob(DispatcherOperation)
   at Avalonia.Threading.Dispatcher.ExecuteJobsCore(Boolean)
   at Avalonia.Threading.Dispatcher.Signaled()
   at Avalonia.Win32.Win32Platform.WndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
   at Avalonia.Win32.Interop.UnmanagedMethods.DispatchMessage(MSG&)
   at Avalonia.Win32.Win32DispatcherImpl.RunLoop(CancellationToken)
   at Avalonia.Threading.DispatcherFrame.Run(IControlledDispatcherImpl)
   at Avalonia.Threading.Dispatcher.PushFrame(DispatcherFrame)
   at Avalonia.Threading.Dispatcher.MainLoop(CancellationToken)
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.Start(String[])
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime(AppBuilder, String[], Action`1 )
   at Ryujinx.Ava.Program.Main(String[] args) in D:\a\Ryujinx\Ryujinx\src\Ryujinx\Program.cs:line 52

I'm currently investigating this myself, so I'll follow up if I figure out more about this issue.

I feel like the error message should maybe include that Handle is a null pointer? https://github.com/AvaloniaUI/Avalonia/blob/76a1c70758884abcebc9e3665aa08290a841efa4/src/Windows/Avalonia.Win32/Win32NativeControlHost.cs#L98-L99

[TSRBerry]

Since CreateWindowExW sets an error code, it would be nice if the exceptions could also include it with the associated error message.

See Marshal.GetLastPInvokeError() and Marshal.GetLastPInvokeErrorMessage()

[timunie]

@TSRBerry maybe you can file a PR to improve the error message as you seem to know where to do it

[maxkatz6]

@TSRBerry you are most likely missing app.manifest file, as it's mentioned in the error message.

[TSRBerry]

Well no, see the issue description and the app.manifest file here.

[maxkatz6]

In this case, can't help much. GetLastPInvokeErrorMessage can be an inner exception, yes.