Bug [IN-42692] BurstILPostProcessor cannot find method

I want to report a bug, which is Burst related. It is happening using the following code:

Code (CSharp):

1.   public partial struct TestSystem : ISystem
2.   {
3.     [BurstCompile]
4.     public void OnCreate(ref SystemState state)
5.     {
6.       state.RequireForUpdate<PhysicsWorldSingleton>();
7.     }
8.  
9.     [BurstCompile]
10.     public void OnUpdate(ref SystemState state)
11.     {
12.  
13.     }
14.  
15.     [BurstCompile]
16.     private void Failing(ref SystemState state, TestRefStruct<SomeTable, SomeStruct<SomeTable>> testRefStruct)
17.     {
18.       SystemAPI.GetSingleton<PhysicsWorldSingleton>();
19.     }
20.    
21.     [BurstCompile]
22.     public void OnDestroy(ref SystemState state)
23.     {
24.  
25.     }
26.   }
27.  
28.   public readonly ref struct TestRefStruct<T1, T2>
29.     where T1 : unmanaged
30.     where T2 : unmanaged
31.   {
32.     private readonly int _index;
33.   }
34.  
35.   public struct SomeStruct<TElement>
36.     where TElement : unmanaged
37.   {
38.   }
39.  
40.   public struct SomeTable
41.   {
42.   }

The following error occurs on compiling the code above even with Burst disabled. It states that the method Failing cannot be found:

Created a reproduction project in IN-42692. Used Burst 1.8.4 and Unity 2022.2.21f.