Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-655.cs

@@ -0,0 +1,25 @@
+public class D
+{
+	byte v;
+
+	byte this [int idx] {
+		get {
+			return v;
+		}
+		set {
+			v = value;
+		}
+	}
+
+	public static int Main ()
+	{
+		D d = new D ();
+		byte b = 1;
+		d [0] += 1;
+		d [0] += b;
+		if (d [0] != 2)
+			return 1;
+
+		return 0;
+	}
+}