From 72bf2418acc0ccaedcbb3a58357cb9d27c0d781e Mon Sep 17 00:00:00 2001
From: Alexander Surkov <surkov.alexander@gmail.com>
Date: Wed, 25 Aug 2010 11:08:43 +0900
Subject: [PATCH] Bug 574312 - fix assertion, r=davidb, a=davidb

---
 accessible/src/base/nsRootAccessible.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/accessible/src/base/nsRootAccessible.cpp b/accessible/src/base/nsRootAccessible.cpp
index 6fe02c286403..2d317338e7ff 100644
--- a/accessible/src/base/nsRootAccessible.cpp
+++ b/accessible/src/base/nsRootAccessible.cpp
@@ -722,7 +722,8 @@ nsRootAccessible::HandleEvent(nsIDOMEvent* aEvent)
     }
     if (!fireFocus) {
       nsCOMPtr<nsINode> realFocusedNode = GetCurrentFocus();
-      nsIContent* realFocusedContent = realFocusedNode->AsElement();
+      nsIContent* realFocusedContent =
+        realFocusedNode->IsElement() ? realFocusedNode->AsElement() : nsnull;
       nsIContent* containerContent = targetContent;
       while (containerContent) {
         nsCOMPtr<nsIDOMXULPopupElement> popup = do_QueryInterface(containerContent);