From c99409b332a2bee95e1139c6786c99a06cca9d3b Mon Sep 17 00:00:00 2001
From: Daniel Micay <danielmicay@gmail.com>
Date: Mon, 22 Apr 2013 13:01:32 -0400
Subject: [PATCH] cell: public field is unsafe

use core::cell;

fn main() {
    let x = cell::Cell(Some(~"foo"));
    let y = x.value.get_ref().get_ref();
    do x.with_mut_ref |z| { *z = None; }
    println(*y) // boom!
}
---
 src/libcore/cell.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcore/cell.rs b/src/libcore/cell.rs
index 1707bddc2b9d4..8c2175eeaca2d 100644
--- a/src/libcore/cell.rs
+++ b/src/libcore/cell.rs
@@ -20,7 +20,7 @@ Similar to a mutable option type, but friendlier.
 */
 
 pub struct Cell<T> {
-    value: Option<T>
+    priv value: Option<T>
 }
 
 impl<T:cmp::Eq> cmp::Eq for Cell<T> {