---

yaml
---
r: 275326
b: refs/heads/stable
c: d66fabb
h: refs/heads/master

Author: arielb1

[refs]

@@ -29,7 +29,7 @@ refs/heads/tmp: e06d2ad9fcd5027bcaac5b08fc9aa39a49d0ecd3
 refs/tags/1.0.0-alpha.2: 4c705f6bc559886632d3871b04f58aab093bfa2f
 refs/tags/homu-tmp: c0221c8897db309a79990367476177b1230bb264
 refs/tags/1.0.0-beta: 8cbb92b53468ee2b0c2d3eeb8567005953d40828
-refs/heads/stable: 0e02ed77fe20758361a51708f7ac2c9c32d13ba8
+refs/heads/stable: d66fabbb399ff6f06dbbe40cd098b5d91f9de115
 refs/tags/1.0.0: 55bd4f8ff2b323f317ae89e254ce87162d52a375
 refs/tags/1.1.0: bc3c16f09287e5545c1d3f76b7abd54f2eca868b
 refs/tags/1.2.0: f557861f822c34f07270347b94b5280de20a597e

branches/stable/src/librustc/middle/check_match.rs

@@ -1047,10 +1047,7 @@ fn is_refutable<A, F>(cx: &MatchCheckCtxt, pat: &Pat, refutable: F) -> Option<A>
 {
     let pats = Matrix(vec!(vec!(pat)));
     match is_useful(cx, &pats, &[DUMMY_WILD_PAT], ConstructWitness) {
-        UsefulWithWitness(pats) => {
-            assert_eq!(pats.len(), 1);
-            Some(refutable(&pats[0]))
-        },
+        UsefulWithWitness(pats) => Some(refutable(&pats[0])),
         NotUseful => None,
         Useful => unreachable!()
     }

branches/stable/src/test/compile-fail/issue-31561.rs

@@ -0,0 +1,20 @@
+// Copyright 2016 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.
+
+enum Thing {
+    Foo(u8),
+    Bar,
+    Baz
+}
+
+fn main() {
+    let Thing::Foo(y) = Thing::Foo(1);
+    //~^ ERROR refutable pattern in local binding: `Bar` not covered
+}