From 6f0cbf4cd4364ee5d7b2c723089dfacf711df8f4 Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Wed, 28 Mar 2012 20:26:28 -0700
Subject: [PATCH] stdlib: Fix a pointer mistake in arenas

---
 src/libstd/arena.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/libstd/arena.rs b/src/libstd/arena.rs
index 3c316ecf5ccd..6d8bc9fa0c3c 100644
--- a/src/libstd/arena.rs
+++ b/src/libstd/arena.rs
@@ -37,9 +37,11 @@ impl arena for arena {
             end = n_bytes;
         }
 
-        let p = ptr::offset(ptr::addr_of(head.fill), start);
-        head.fill = end;
-        unsafe { ret unsafe::reinterpret_cast(p); }
+        unsafe {
+            let p = ptr::offset(vec::unsafe::to_ptr(head.data), start);
+            head.fill = end;
+            ret unsafe::reinterpret_cast(p);
+        }
     }
 }