Test that we can call unboxed closures with the sugar now. Fixes #16929.

Author: nikomatsakis

src/test/run-pass/unboxed-closures-call-sugar-object.rs

@@ -0,0 +1,25 @@
+// Copyright 2012 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)]
+
+use std::ops::FnMut;
+
+fn make_adder(x: int) -> Box<FnMut(int)->int + 'static> {
+    box move |y| { x + y }
+}
+
+pub fn main() {
+    let mut adder = make_adder(3);
+    let z = (*adder)(2);
+    println!("{}", z);
+    assert_eq!(z, 5);
+}
+