Regression test for #11820

Closes #11820.

Author: tamird

src/test/run-pass/issue-11820.rs

@@ -0,0 +1,19 @@
+// 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.
+
+struct NoClone;
+
+fn main() {
+  let rnc = &NoClone;
+  let rsnc = &Some(NoClone);
+
+  let _: &NoClone = rnc.clone();
+  let _: &Option<NoClone> = rsnc.clone();
+}