---

yaml
---
r: 226924
b: refs/heads/master
c: 75c6428
h: refs/heads/master
v: v3

Author: nathankleyn

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 55752a4bdeae5dad77875b7702a14882fd12725b
+refs/heads/master: 75c6428e1bf2f5564392276642d962163d8a9809
 refs/heads/snap-stage3: 1af31d4974e33027a68126fa5a5a3c2c6491824f
 refs/heads/try: b53c0f93eedcdedd4fd89bccc5a3a09d1c5cd23e
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105

trunk/src/librustc_borrowck/diagnostics.rs

@@ -179,6 +179,14 @@ let mut x: i64 = 1;
 let mut y: Box<_> = Box::new(&mut x);
 **y = 2;
 ```
+
+It can also be fixed by using a type with interior mutability, such as `Cell` or
+`RefCell`:
+
+```
+let y: Cell<_> = Cell::new(1);
+y.set(2);
+```
 "##,
 
 E0387: r##"