Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0019-40.cs

@@ -0,0 +1,26 @@
+// CS0019: Operator `==' cannot be applied to operands of type `Foo' and `null'
+// Line: 14
+
+struct Foo
+{
+	public static bool operator == (int d1, Foo d2)
+	{
+		throw new System.ApplicationException ();
+	}
+		
+	public static bool operator != (int d1, Foo d2)
+	{
+		throw new System.ApplicationException ();	
+	}
+}
+
+public class Test
+{
+	static Foo ctx;
+
+	public static void Main ()
+	{
+		if (ctx == null)
+			return;
+	}
+}