Exception is thrown if method with an interpolated string handler argument on a mocked interface is called

[appel1]

Describe the bug
If a mocked interface has a method with an interpolated string handler an exception is thrown if the method is called.

To Reproduce

using System.Runtime.CompilerServices;

var foo = NSubstitute.Substitute.For<IFoo>();

foo.Foo($"{foo.GetType()}");

public interface IFoo
{
    void Foo(DefaultInterpolatedStringHandler handler);
}

System.InvalidProgramException
  HResult=0x8013153A
  Message=Common Language Runtime detected an invalid program.
  Source=DynamicProxyGenAssembly2
  StackTrace:
   at Castle.Proxies.ObjectProxy.Foo(DefaultInterpolatedStringHandler handler)
   at Program.<Main>$(String[] args) in Program.cs:line 6

Expected behaviour
No exception

Environment:

• NSubstitute version: 5.0
• Platform: .NET 7.0

[GeraldLx]

NSubstitute relies on Castle.Core for proxy generation.

It seems Castle.Core does not work with ref struct types. So there is not much NSubstitute can do about this.

[appel1]

Possibly related issue castleproject/Core#651

[Meryovi]

The same error occurs when calling a method expecting a params ReadOnlySpan<T> or params Span<T>.

public class Test
{
    [Fact]
    public void Test1()
    {
        var sub = Substitute.For<ITest>();
        sub.Test('a', 'b', 'c');
    }
}

public interface ITest
{
    void Test(params ReadOnlySpan<char> data);
}

Error Message: System.InvalidProgramException : Common Language Runtime detected an invalid program.
      Stack Trace:
         at Castle.Proxies.ObjectProxy.Test(Span`1 data)
         at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
         at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

It might not be a huge deal right now as this is a new C# feature, but it might become more prominent as the feature becomes widely adopted.

Possibly also related to castleproject/Core#663