$OpenBSD$

index 7549ab9..b752dc9 100644
--- xpcom/base/nsCycleCollector.cpp.orig	Fri Feb 20 15:40:39 2015
+++ xpcom/base/nsCycleCollector.cpp	Fri Feb 20 15:40:39 2015
@@ -916,7 +916,8 @@ private:
         {
             nsPurpleBufferEntry *eEnd = ArrayEnd(mEntries);
             for (nsPurpleBufferEntry *e = mEntries; e != eEnd; ++e) {
-                if (!(uintptr_t(e->mObject) & uintptr_t(1))) {
+                MOZ_ASSERT(e->mObject, "There should be no null mObject when we iterate over the purple buffer");
+                if (!(uintptr_t(e->mObject) & uintptr_t(1)) && e->mObject) {
                     aVisitor.Visit(aBuffer, e);
                 }
             }