Bug 373325 Firefox crash randomly [@ nsAccessNode::GetRootAccessible]

patch by Evan.Yan at sun.com r=aaronleventhal git-svn-id: svn://10.0.0.236/trunk@221762 18797224-902f-48f8-a5cc-f745e15eee43
2007-03-12 05:41:31 +00:00
parent 9d94c15fea
commit 2f32d8b89f
1 changed files with 3 additions and 0 deletions
--- a/mozilla/accessible/src/base/nsAccessNode.cpp
+++ b/mozilla/accessible/src/base/nsAccessNode.cpp
@@ -595,6 +595,9 @@ nsAccessNode::GetPresShellFor(nsIDOMNode *aNode)
 already_AddRefed<nsIDocShellTreeItem>
 nsAccessNode::GetDocShellTreeItemFor(nsIDOMNode *aStartNode)
 {
+  if (!aStartNode) {
+    return nsnull;
+  }
  nsCOMPtr<nsIDOMDocument> domDoc;
  aStartNode->GetOwnerDocument(getter_AddRefs(domDoc));
  nsCOMPtr<nsIDocument> doc(do_QueryInterface(domDoc));