Comment 2 for bug 1283551

StacktraceTop:
 object_instance_finalize (fop=<optimized out>, obj=0x7f4cb701ed00) at gi/object.cpp:1364
 finalize (fop=0x7fffc22638b0, this=0x7f4cb701ed00) at /build/buildd/mozjs24-24.2.0/js/src/jsobjinlines.h:213
 finalize<JSObject> (thingSize=48, thingKind=js::gc::FINALIZE_OBJECT2, fop=0x7fffc22638b0, this=0x7f4cb701e000) at /build/buildd/mozjs24-24.2.0/js/src/jsgc.cpp:331
 FinalizeTypedArenas<JSObject> (dest=..., budget=..., thingKind=js::gc::FINALIZE_OBJECT2, src=0x7fffc2263848, fop=0x7fffc22638b0) at /build/buildd/mozjs24-24.2.0/js/src/jsgc.cpp:395
 FinalizeArenas (fop=fop@entry=0x7fffc22638b0, src=src@entry=0x7fffc2263848, dest=..., thingKind=thingKind@entry=js::gc::FINALIZE_OBJECT2, budget=...) at /build/buildd/mozjs24-24.2.0/js/src/jsgc.cpp:432