---

yaml
---
r: 81976
b: refs/heads/master
c: c151d37
h: refs/heads/master
v: v3

Author: bors

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 3709aa78d8fc75ed739e837d7c96205b8494188d
+refs/heads/master: c151d371fcfb51fbf4d84f0ef266e30d64acd71a
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 6c08cc2db4f98e9f07ae7d50338396c4123c2f0a
 refs/heads/try: 70152ff55722878cde684ee6462c14c65f2c4729

trunk/src/librustc/middle/check_match.rs

@@ -773,12 +773,12 @@ pub fn specialize(cx: &MatchCheckCtxt,
                         let num_elements = before.len() + after.len();
                         if num_elements < arity && slice.is_some() {
                             Some(vec::append(
-                                [
+                                vec::concat(&[
                                     before,
                                     vec::from_elem(
                                         arity - num_elements, wild()),
                                     after
-                                ].concat_vec(),
+                                ]),
                                 r.tail()
                             ))
                         } else if num_elements == arity {