Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-416.cs

@@ -0,0 +1,23 @@
+public class Z { }
+
+public class A<X, Y>
+	where Y : Z
+	where X : Y
+{
+	public X Foo (Y y)
+	{
+		return y as X;
+	}
+}
+
+public class Foo
+{
+	public static int Main ()
+	{
+		var a = new A<Z, Z> ();
+		if (a.Foo (new Z ()) == null)
+			return 1;
+		
+		return 0;
+	}
+}