---

yaml
---
r: 176694
b: refs/heads/tmp
c: b7ef34d
h: refs/heads/master
v: v3

Author: nikomatsakis

[refs]

@@ -34,4 +34,4 @@ refs/heads/building: 126db549b038c84269a1e4fe46f051b2c15d6970
 refs/heads/beta: 44a287e6eb22ec3c2a687fc156813577464017f7
 refs/heads/windistfix: 7608dbad651f02e837ed05eef3d74a6662a6e928
 refs/tags/1.0.0-alpha: e42bd6d93a1d3433c486200587f8f9e12590a4d7
-refs/heads/tmp: bd621f0ccb3b6c657a056fd949ed105f77a7a01f
+refs/heads/tmp: b7ef34d0982ee28797fff346de899ea40de718b8

branches/tmp/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(());
+}