Add regression test for Clone for [[T; 256]; 4] where T: Copy and not Clone

Author: bluss

src/test/run-pass/deriving-clone-array.rs

@@ -0,0 +1,18 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// test for issue #30244
+
+#[derive(Copy, Clone)]
+struct Array {
+    arr: [[u8; 256]; 4]
+}
+
+pub fn main() {}