Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-563.cs

@@ -0,0 +1,29 @@
+// Compiler options: -warn:4 -warnaserror
+
+using System;
+using System.Collections;
+
+public class Test
+{
+	internal object TestMethod (TestCollection t)
+	{
+		foreach (object x in t)
+		{
+			return x;
+		}
+		return null;
+	}
+
+	public static void Main ()
+	{
+	}
+}
+
+interface ITestCollection : IEnumerable
+{
+	new IEnumerator GetEnumerator ();
+}
+
+interface TestCollection : ITestCollection
+{
+}