add test for #14821

closes #14821

Author: apasel422

src/test/run-pass/issue-14821.rs

@@ -0,0 +1,28 @@
+// 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.
+
+trait SomeTrait {}
+struct Meow;
+impl SomeTrait for Meow {}
+
+struct Foo<'a> {
+    x: &'a SomeTrait,
+    y: &'a SomeTrait,
+}
+
+impl<'a> Foo<'a> {
+    pub fn new<'b>(x: &'b SomeTrait, y: &'b SomeTrait) -> Foo<'b> { Foo { x: x, y: y } }
+}
+
+fn main() {
+    let r = Meow;
+    let s = Meow;
+    let q = Foo::new(&r as &SomeTrait, &s as &SomeTrait);
+}