From 88f5ab31635855595e4053cb64153e6bb7ec622b Mon Sep 17 00:00:00 2001
From: Elliott Slaughter <eslaughter@mozilla.com>
Date: Wed, 22 Aug 2012 16:55:48 -0700
Subject: [PATCH] gc: Fix for deallocating resources on the shared heap while
 cleaning stack.

---
 src/libcore/gc.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libcore/gc.rs b/src/libcore/gc.rs
index 697c6fcdfb49..741fa4de1225 100644
--- a/src/libcore/gc.rs
+++ b/src/libcore/gc.rs
@@ -113,7 +113,8 @@ unsafe fn walk_gc_roots(mem: Memory, visitor: Visitor) {
                             let refcount = **root;
                             if mem | task_local_heap != 0 && refcount != -1 {
                                 if !visitor(root, tydesc) { return; }
-                            } else if mem | exchange_heap != 0 {
+                            } else if mem | exchange_heap != 0
+                                && refcount == -1 {
                                 if !visitor(root, tydesc) { return; }
                             }
                         } else {