From f8c61da0704f86726139197b3d34381ac3e1334f Mon Sep 17 00:00:00 2001
From: Oliver Schneider <git-spam-no-reply9815368754983@oli-obk.de>
Date: Wed, 2 Aug 2017 12:56:07 +0200
Subject: [PATCH] Add a test for untagged unions

---
 tests/run-pass-fullmir/unsized-tuple-impls.rs | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tests/run-pass-fullmir/unsized-tuple-impls.rs

diff --git a/tests/run-pass-fullmir/unsized-tuple-impls.rs b/tests/run-pass-fullmir/unsized-tuple-impls.rs
new file mode 100644
index 0000000000000..d332f7be8330f
--- /dev/null
+++ b/tests/run-pass-fullmir/unsized-tuple-impls.rs
@@ -0,0 +1,21 @@
+// Copyright 2017 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.
+
+#![feature(unsized_tuple_coercion)]
+
+fn main() {
+    let x : &(i32, i32, [i32]) = &(0, 1, [2, 3]);
+    let y : &(i32, i32, [i32]) = &(0, 1, [2, 3, 4]);
+    let mut a = [y, x];
+    a.sort();
+    assert_eq!(a, [x, y]);
+
+    assert_eq!(&format!("{:?}", a), "[(0, 1, [2, 3]), (0, 1, [2, 3, 4])]");
+}