From 0766e330ebce2c8e17624f46b1d34978f5916df7 Mon Sep 17 00:00:00 2001
From: Daniel Holbert <dholbert@cs.stanford.edu>
Date: Wed, 3 Sep 2014 14:14:37 -0700
Subject: [PATCH] Bug 1061970: Check if JS variable 'this._statements' is
 defined before using it (and use 'for...of'), in CPS2_destroy(). r=adw

---
 toolkit/components/contentprefs/ContentPrefService2.jsm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/toolkit/components/contentprefs/ContentPrefService2.jsm b/toolkit/components/contentprefs/ContentPrefService2.jsm
index 68c416c4994..f6c3866fdcb 100644
--- a/toolkit/components/contentprefs/ContentPrefService2.jsm
+++ b/toolkit/components/contentprefs/ContentPrefService2.jsm
@@ -654,8 +654,10 @@ ContentPrefService2.prototype = {
   },
 
   destroy: function CPS2_destroy() {
-    for each (let stmt in this._statements) {
-      stmt.finalize();
+    if (this._statements) {
+      for (let stmt of this._statements) {
+        stmt.finalize();
+      }
     }
   },