Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-520.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+class A
+{
+	public void Method ()
+	{
+	}
+}
+
+class C : IEnumerable, IEnumerable<A>
+{
+	public class GetEnumerator
+	{
+	}
+	
+	IEnumerator IEnumerable.GetEnumerator ()
+	{
+		throw new ApplicationException ();
+	}
+
+	IEnumerator<A> IEnumerable<A>.GetEnumerator ()
+	{
+		return new List<A> ().GetEnumerator ();
+	}
+}
+
+class D : C
+{
+}
+
+public class Test
+{
+	public static int Main ()
+	{
+		foreach (var v in new C ()) {
+			v.Method ();
+		}
+
+		foreach (var v in new D ()) {
+			v.Method ();
+		}
+
+		return 0;
+	}
+}