Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/dtest-040.cs

@@ -0,0 +1,52 @@
+struct S<T1, T2>
+{
+	public T1 First;
+	public T2 Second;
+}
+
+class A
+{
+	public virtual S<U, object> Foo<U> (U u)
+	{
+		return new S<U, object> ();
+	}
+}
+
+class B : A
+{
+	public override S<T, dynamic> Foo<T> (T t)
+	{
+		return new S<T, dynamic> () {
+			First = t,
+			Second = "second"
+		};
+	}
+}
+
+public class MainClass
+{
+	public static int Main ()
+	{
+		B b = new B ();
+		var res = b.Foo<int> (5);
+		int i;
+		i = res.First;
+		if (i != 5)
+			return 1;
+		
+		i = res.Second.Length;
+		if (i != 6)
+			return 2;
+		
+		res = b.Foo (4);
+		i = res.First;
+		if (i != 4)
+			return 3;
+		
+		i = res.Second.Length;
+		if (i != 6)
+			return 4;
+		
+		return 0;
+	}
+}