Imported Upstream version 3.10.0

Former-commit-id: 172c8e3c300b39d5785c7a3e8dfb08ebdbc1a99b

mcs/errors/cs0464-5.cs

@@ -0,0 +1,16 @@
+// CS0464: The result of comparing type `E?' with null is always `false'
+// Line: 14
+// Compiler options: -warnaserror
+
+enum E
+{
+}
+
+class X
+{
+	public static void Main ()
+	{
+		E u = 0;
+		var b = u < (E?) null;
+	}
+}