Hot reload fails to flow generic constraints to the inherited class

[mikelle-rogers]

Description

When adding a new class with generic constraints and passing it down to the parent class the update seems to apply successfully but the generated type is invalid.

Reproduction Steps

Run the following program with dotnet watch or from Visual Studio and uncomment L10 when the application is running.

using System.Reflection.Metadata;

[assembly: MetadataUpdateHandler(typeof(MetadataUpdateHandler))]

Console.WriteLine("Ready..");

await Task.Delay(-1);

public interface ICat;
internal abstract class Holder<T>;
//internal sealed class CatHolder<T> : Holder<T> where T : ICat; //Uncomment this line when the application is running.

internal static class MetadataUpdateHandler
{
	private static void UpdateApplication(Type[]? _)
	{
		try
		{
			Console.WriteLine("Update..");
			GC.KeepAlive(typeof(MetadataUpdateHandler).Assembly.GetTypes());
		}
		catch (Exception ex)
		{
			Console.WriteLine(ex);
		}
	}
}

Expected behavior

The update is applied successfully with the correct generic constraints.

Actual behavior

The following exception is printed to the console.

System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types.
GenericArguments[0], 'T', on 'Holder`1[T]' violates the constraint of type parameter 'T'.
   at System.Reflection.RuntimeModule.GetDefinedTypes()
   at System.Reflection.RuntimeModule.GetTypes()
   at MetadataUpdateHandler.UpdateApplication(Type[] _)
System.TypeLoadException: GenericArguments[0], 'T', on 'Holder`1[T]' violates the constraint of type parameter 'T'.

Regression?

No, fails on .NET 6 and .NET 8.

Known Workarounds

No response

Configuration

9.0.100-preview.2.24157.14
Microsoft Visual Studio Community 2022 (64-bit) - Preview Version 17.10.0 Preview 2.0

Other information

No response

[mikelle-rogers]

Original issue filed here by @aromaa