Add test for issue #20414

src/test/run-pass/issue-20414.rs

+// Copyright 2014 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.
+
+trait Trait {
+        fn method(self) -> int;
+}
+
+struct Wrapper<T> {
+        field: T
+}
+
+impl<'a, T> Trait for &'a Wrapper<T> where &'a T: Trait {
+    fn method(self) -> int {
+        let r: &'a T = &self.field;
+        Trait::method(r); // these should both work
+        r.method()
+    }
+}
+
+fn main() {}