---

yaml
---
r: 83538
b: refs/heads/try
c: c151d37
h: refs/heads/master
v: v3

Author: bors

[refs]

@@ -2,7 +2,7 @@
 refs/heads/master: 0e4d1fc8cae42e15e00f71d9f439b01bb25a86ae
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 6c08cc2db4f98e9f07ae7d50338396c4123c2f0a
-refs/heads/try: 3709aa78d8fc75ed739e837d7c96205b8494188d
+refs/heads/try: c151d371fcfb51fbf4d84f0ef266e30d64acd71a
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: 147ecfdd8221e4a4d4e090486829a06da1e0ca3c

branches/try/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 {