--- /dev/null
+// Copyright 2013 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.
+
+// Tests correct kind-checking of the reason stack closures without the :Copy
+// bound must be noncopyable. For details see
+// http://smallcultfollowing.com/babysteps/blog/2013/04/30/the-case-of-the-recurring-closure/
+
+struct R<'self> {
+ // This struct is needed to create the
+ // otherwise infinite type of a fn that
+ // accepts itself as argument:
+ c: &'self fn:Copy(&R, bool)
+}
+
+fn innocent_looking_victim() {
+ let mut x = Some(~"hello");
+ do conspirator |f, writer| {
+ if writer {
+ x = None; //~ ERROR cannot implicitly borrow
+ } else {
+ match x {
+ Some(ref msg) => {
+ (f.c)(f, true);
+ println(fmt!("%?", msg));
+ },
+ None => fail!("oops"),
+ }
+ }
+ }
+}
+
+fn conspirator(f: &fn:Copy(&R, bool)) {
+ let r = R {c: f};
+ f(&r, false)
+}
+
+fn main() { innocent_looking_victim() }
--- /dev/null
+// Copyright 2013 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.
+
+// Tests correct kind-checking of the reason stack closures without the :Copy
+// bound must be noncopyable. For details see
+// http://smallcultfollowing.com/babysteps/blog/2013/04/30/the-case-of-the-recurring-closure/
+
+struct R<'self> {
+ // This struct is needed to create the
+ // otherwise infinite type of a fn that
+ // accepts itself as argument:
+ c: &'self fn(&R, bool)
+}
+
+fn innocent_looking_victim() {
+ let mut x = Some(~"hello");
+ do conspirator |f, writer| {
+ if writer {
+ x = None;
+ } else {
+ match x {
+ Some(ref msg) => {
+ (f.c)(f, true);
+ println(fmt!("%?", msg));
+ },
+ None => fail!("oops"),
+ }
+ }
+ }
+}
+
+fn conspirator(f: &fn(&R, bool)) {
+ let r = R {c: f};
+ f(&r, false) //~ ERROR use of moved value
+}
+
+fn main() { innocent_looking_victim() }