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Cannot box a ByRef-like (ref struct) when using a CreateDelegate method on method that accepts a ByRef-like parameter. #72548
Description
The following code correctly runs on CoreCLR and fails on NativeAOT:
https://gist.github.com/Suchiman/b09ad481065e3e2b17d89e321121bacc
NativeAOT fails with the following exception: System.NotSupportedException: Cannot create boxed ByRef-like values.
The issue occurs at this line:
typeof(Program).GetMethod("Method")!.CreateDelegate<ExampleDelegate>();
Activity
[-]Cannot box a ByRef-like (ref struct) when using a CreateDelegate method on method that accepts a ByRef-like parmater.[/-][+]Cannot box a ByRef-like (ref struct) when using a CreateDelegate method on method that accepts a ByRef-like parameter.[/+]MichalStrehovsky commentedon Jul 13, 2021
Related to dotnet/runtimelab#265. We block reflection invoke on everything byref-like. Unfortunately it includes reflection-creating a delegate, which is not a fundamental problem. We probably need to generate entries for this in the AOT compiler and filter them out elsewhere.
Delete DelegateInvokeThunk
Delete DelegateInvokeThunk (#72903)
[NativeAOT] Reflection Invoke refactoring
[NativeAOT] Reflection Invoke refactoring (#73131)