---

yaml
---
r: 228396
b: refs/heads/try
c: 00f7268
h: refs/heads/master
v: v3

Author: frewsxcv

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: aca2057ed5fb7af3f8905b2bc01f72fa001c35c8
 refs/heads/snap-stage3: 1af31d4974e33027a68126fa5a5a3c2c6491824f
-refs/heads/try: 26ef17d1a937ab61c3cd7d41c97066a966e0fc51
+refs/heads/try: 00f726803bfdfa49d4f43bb8038f91ff3f8551d5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try/src/test/run-pass/issue-20544.rs

@@ -0,0 +1,27 @@
+// 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.
+
+#![feature(unboxed_closures)]
+#![feature(core)]
+
+struct Fun<F>(F);
+
+impl<F, T> FnOnce<(T,)> for Fun<F> where F: Fn(T) -> T {
+    type Output = T;
+
+    extern "rust-call" fn call_once(self, (t,): (T,)) -> T {
+        (self.0)(t)
+    }
+}
+
+fn main() {
+    let fun = Fun(|i: isize| i * 2);
+    println!("{}", fun(3));
+}