Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-776.cs

@@ -0,0 +1,40 @@
+using System;
+
+class First
+{
+	public virtual object this [string name]
+	{
+		get { return "First"; }
+		set { }
+	}
+}
+
+class Second : First
+{
+	public override object this [string name]
+	{
+		get { return "Second"; }
+		set { }
+	}
+}
+
+class Third : Second
+{
+	public override object this [string name]
+	{
+		get { return base [name]; }
+		set { }
+	}
+}
+
+class a
+{
+	public static int Main (string[] args)
+	{
+		First t = (First)new Third ();
+		if (t ["test"] != "Second")
+			return 1;
+		
+		return 0;
+	}
+}