Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

mcs/tests/gtest-639.cs

@@ -0,0 +1,47 @@
+class A<T> where T : CB, IA
+{
+	void Foo (T t)
+	{
+		t.Prop = 3;
+		long l = t.Prop2;
+		t["1"] = "2";
+	}
+}
+
+class A2<T, U> 
+	where T : CB, U
+	where U : IA
+{
+	void Foo (T t)
+	{
+		t.Prop = 3;
+		long l = t.Prop2;
+		t["1"] = "2";
+	}
+}
+
+class CB : CA
+{
+}
+
+class CA
+{
+	public int Prop { get; set; }
+
+	public string this [byte b] { get { return ""; } }
+}
+
+interface IA
+{
+	string Prop { get; set; }
+	long Prop2 { get; }
+
+	string this [string b] { get; set; }
+}
+
+class X
+{
+	public static void Main ()
+	{
+	}
+}