Add failing test for invocation.MethodInvocationTarget

This triggers a `ArgumentException`: "Could not find method overriding
[...]. This is most likely a bug. Please report it."

Author: stakx

src/Castle.Core.Tests/DynamicProxy.Tests/OutRefParamsTestCase.cs

@@ -92,6 +92,17 @@ public virtual void MyMethodWithStruct(ref MyStruct s)
 			}
 		}
 
+		public class Factory
+		{
+			public virtual void Create<T>(out T result) => result = default(T);
+		}
+
+		public class DerivedFactory : Factory
+		{
+			public override void Create<T>(out T result) => result = default(T);
+
+		}
+
 		[Test]
 		public void CanAffectValueOfOutParameter()
 		{
@@ -353,5 +364,13 @@ public void Exception_during_method_out_ref_arguments_set_interface_proxy_with_t
 			Assert.AreEqual(23, param1);
 			Assert.AreEqual("23", param2);
 		}
+
+		[Test]
+		public void Can_query_MethodInvocationTarget_for_overridden_class_method_having_a_generic_by_ref_parameter()
+		{
+			var interceptor = new WithCallbackInterceptor(invocation => _ = invocation.MethodInvocationTarget);
+			var proxy = generator.CreateClassProxy<DerivedFactory>(interceptor);
+			proxy.Create<object>(out _);
+		}
 	}
-}
+}