From 939b4e57e374d4b4707b3dfd70e8caa694bf99d8 Mon Sep 17 00:00:00 2001
From: "peterv%propagandism.org"
 <peterv%propagandism.org@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Wed, 13 Jan 2010 14:29:15 +0000
Subject: [PATCH] Bug 502687 - GCGraphBuilder::AddNode crashes on OOM. Patch by
 mrbkap, r=dbaron, a=dveditz.

git-svn-id: svn://10.0.0.236/trunk@259382 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/xpcom/base/nsCycleCollector.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mozilla/xpcom/base/nsCycleCollector.cpp b/mozilla/xpcom/base/nsCycleCollector.cpp
index fa73e0b22f9..ef8b74387cd 100644
--- a/mozilla/xpcom/base/nsCycleCollector.cpp
+++ b/mozilla/xpcom/base/nsCycleCollector.cpp
@@ -1283,6 +1283,9 @@ GCGraphBuilder::AddNode(void *s, nsCycleCollectionParticipant *aParticipant
                        )
 {
     PtrToNodeEntry *e = static_cast<PtrToNodeEntry*>(PL_DHashTableOperate(&mPtrToNodeMap, s, PL_DHASH_ADD));
+    if (!e)
+        return nsnull;
+
     PtrInfo *result;
     if (!e->mNode) {
         // New entry.