Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

mcs/tests/test-926.cs

@@ -0,0 +1,32 @@
+class Program
+{
+	public static void Main ()
+	{
+		System.Console.WriteLine("Hi");
+	}
+}
+
+public class MyClass
+{
+	protected internal virtual int this[int i]
+	{
+		protected get
+		{
+			return 2;
+		}
+		set
+		{
+		}
+	}
+}
+
+public class Derived : MyClass
+{
+	protected internal override int this[int i]
+	{
+		protected get
+		{
+			return 4;
+		}
+	}
+}