TriangleDroid test app crashes while trying to get GL context via SDL2

[charm137]

Encountering the following exception while trying to run the TriangleDroid app within Labs either on an emulator (targeting API 28 / Android 9.0) or on a physical device (a Pixel 2 with API 30 / Android 11). I am using the master branch updated to the commit with no changes to the code: 5b4ab6d

$exception {System.InvalidProgramException: Invalid IL code in Silk.NET.SDL.SdlContext:AssertNotCreated (): IL_0008: cgt.un

Stacktrace:

  at Silk.NET.SDL.SdlContext.set_Window (Silk.NET.SDL.Window* value) [0x00001] in E:\Code\Silk.NET\src\Windowing\Silk.NET.SDL\SdlContext.cs:48 
  at Silk.NET.SDL.SdlContext..ctor (Silk.NET.SDL.Sdl sdl, Silk.NET.SDL.Window* window, Silk.NET.Core.Contexts.IGLContextSource source, System.ValueTuple`2[Silk.NET.SDL.GLattr,System.Int32][] attributes) [0x0000f] in E:\Code\Silk.NET\src\Windowing\Silk.NET.SDL\SdlContext.cs:32 
  at Silk.NET.Windowing.Sdl.SdlView.get_GLContext () [0x00000] in E:\Code\Silk.NET\src\Windowing\Silk.NET.Windowing.Sdl\SdlView.cs:58 
  at Silk.NET.Windowing.Sdl.SdlView.CoreInitialize (Silk.NET.Windowing.ViewOptions opts, System.Nullable`1[T] additionalFlags, System.Nullable`1[T] x, System.Nullable`1[T] y, System.Nullable`1[T] w, System.Nullable`1[T] h, System.String title, Silk.NET.Core.Contexts.IGLContext sharedContext) [0x0012b] in E:\Code\Silk.NET\src\Windowing\Silk.NET.Windowing.Sdl\SdlView.cs:161 
  at Silk.NET.Windowing.Sdl.SdlView.CoreInitialize (Silk.NET.Windowing.ViewOptions opts) [0x00000] in E:\Code\Silk.NET\src\Windowing\Silk.NET.Windowing.Sdl\SdlView.cs:100 
  at Silk.NET.Windowing.Internals.ViewImplementationBase.Initialize () [0x00011] in E:\Code\Silk.NET\src\Windowing\Silk.NET.Windowing.Common\Internals\ViewImplementationBase.cs:97 
  at Silk.NET.Windowing.WindowExtensions.Run (Silk.NET.Windowing.IView view) [0x0000e] in E:\Code\Silk.NET\src\Windowing\Silk.NET.Windowing.Common\WindowExtensions.cs:47 
  at Triangle.Program.Main (System.String[] args) [0x000d7] in E:\Code\Silk.NET\src\Lab\Triangle\Program.cs:58 
  at TriangleDroid.MainActivity.OnRun () [0x00016] in E:\Code\Silk.NET\src\Lab\TriangleDroid\MainActivity.cs:20 
  at Silk.NET.Windowing.Sdl.Android.SilkActivity.Run () [0x00001] in E:\Code\Silk.NET\src\Windowing\Android\Silk.NET.Windowing.Sdl.Android\Additions\SilkActivity.cs:65 
  at Silk.NET.Windowing.Sdl.Android.SilkActivity.Main () [0x00019] in E:\Code\Silk.NET\src\Windowing\Android\Silk.NET.Windowing.Sdl.Android\Additions\SilkActivity.cs:45 
  at (wrapper native-to-managed) Silk.NET.Windowing.Sdl.Android.SilkActivity.Main()}	System.InvalidProgramException

Steps to reproduce

• Platform: Mobile (physical and emulator)
• Framework Version: .NET Core 3, Xamarin Android 9.0/11.0
• API: OpenGL
• API Version: OpenGLES 3.0 (I think)

1. Try to launch the TriangleDroid via Visual Studio 2019 either on an emulator or an Android device

Normal Xamarin.Android apps work properly so I am not sure if it's a problem with my specific set up. Please let me know if any other info would be of help.

[thargy]

This might be a mono bug? I found this report from 17 June.

[Perksey]

Can you try to obtian the version of Mono your Xamarin framework is using? Filing an issue upstream as this looks to be a Mono bug.

[charm137]

Thank you for investigating. I am using Xamarin.Android 11.1.0.17 which I believe uses the Mono 6.12 runtime ( mono/mono@be2226b5a1c ).

[charm137]

Thanks. This simple workaround (in the latest commit) works.

[Perksey]

Ah glad to hear it!

[Perksey]

Closing as we added a working workaround in 2.0, which is now in full release 🎉