Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-302.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+interface ITest : IEnumerable<int> {
+}
+
+class Test : ITest {
+	IEnumerator IEnumerable.GetEnumerator () { throw new Exception (); }
+	IEnumerator<int> IEnumerable<int>.GetEnumerator () { yield break; }
+}
+
+class M {
+	public static void Main ()
+	{
+		ITest foo = new Test ();
+		foreach (int i in foo)
+			Console.WriteLine (i);
+	}
+}