Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-869.cs

@@ -0,0 +1,49 @@
+using System;
+
+public class C
+{
+	public static readonly C Token = new C ();
+
+	public static C operator & (C set, E value)
+	{
+		return Token;
+	}
+
+	public static implicit operator E (C c)
+	{
+		throw new ApplicationException ();
+	}
+}
+
+public enum E
+{
+	Item = 2
+}
+
+enum E2
+{
+	A = 0,
+	B,
+	C
+}
+
+class FooClass
+{
+	public static int Main ()
+	{
+		C m = new C ();
+		var x = E.Item;
+		var res = m & x;
+		if (res != C.Token)
+			return 1;
+
+		res = m & E.Item;
+		if (res != C.Token)
+			return 2;
+
+		E2 e2 = E2.C;
+
+		int day1 = e2 - E2.A;
+		return 0;	
+	}
+}