Index: xptiInterfaceInfoManager.cpp
===================================================================
RCS file: /cvsroot/mozilla/xpcom/reflect/xptinfo/src/xptiInterfaceInfoManager.cpp,v
retrieving revision 1.60
diff -pu -r1.60 xptiInterfaceInfoManager.cpp
--- xptiInterfaceInfoManager.cpp
+++ xptiInterfaceInfoManager.cpp
@@ -69,8 +69,11 @@ xptiInterfaceInfoManager::GetInterfaceIn
         }
 
         gInterfaceInfoManager = new xptiInterfaceInfoManager(searchPath);
-        if(gInterfaceInfoManager)
-            NS_ADDREF(gInterfaceInfoManager);
+        if(!gInterfaceInfoManager)
+        {
+            return nsnull;
+        }
+
         if(!gInterfaceInfoManager->IsValid())
         {
             NS_RELEASE(gInterfaceInfoManager);