---

yaml
---
r: 176351
b: refs/heads/try
c: b7ef34d
h: refs/heads/master
i:
  176349: 6e49e60
  176347: 4944b1c
  176343: f76d246
  176335: dda2685
  176319: 89b41f8
v: v3

Author: nikomatsakis

[refs]

@@ -2,7 +2,7 @@
 refs/heads/master: a530cc9706324ad44dba464d541a807eb5afdb08
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 777435990e0e91df6b72ce80c9b6fa485eeb5daa
-refs/heads/try: bd621f0ccb3b6c657a056fd949ed105f77a7a01f
+refs/heads/try: b7ef34d0982ee28797fff346de899ea40de718b8
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596

branches/try/src/test/run-pass/issue-20971.rs

@@ -0,0 +1,32 @@
+// 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.
+
+// Regression test for Issue #20971.
+
+pub trait Parser {
+    type Input;
+    fn parse(&mut self, input: <Self as Parser>::Input);
+}
+
+impl Parser for () {
+    type Input = ();
+    fn parse(&mut self, input: ()) {
+
+    }
+}
+
+pub fn many() -> Box<Parser<Input=<() as Parser>::Input> + 'static> {
+    panic!()
+}
+
+fn main() {
+    many()
+        .parse(());
+}