---

yaml
---
r: 63867
b: refs/heads/snap-stage3
c: d7544fe
h: refs/heads/master
i:
  63865: 90689e7
  63863: 359d100
v: v3

Author: bblum

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: 2d28d645422c1617be58c8ca7ad9a457264ca850
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: d4722e53332a854228a2db6a682da5e0017fe73e
+refs/heads/snap-stage3: d7544fe987104ad0a82b1929b819cfd7e2321bb2
 refs/heads/try: 7b78b52e602bb3ea8174f9b2006bff3315f03ef9
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b

branches/snap-stage3/src/test/compile-fail/the-case-of-the-recurring-closure-2.rs

@@ -0,0 +1,44 @@
+// 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() }

branches/snap-stage3/src/test/compile-fail/the-case-of-the-recurring-closure.rs

@@ -0,0 +1,44 @@
+// 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() }