Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-480.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+
+interface I<T> : ICollection<T>, IEnumerable<T>
+{
+}
+
+class C
+{
+	void Foo ()
+	{
+		I<object> o = null;
+		foreach (var v in o)
+			Console.WriteLine (v);
+	}
+	
+	public static void Main ()
+	{
+		IList<int> list = new List<int> { 1, 3 };
+		var g = list.GetEnumerator ();
+	}
+}