Comment 2 for bug 837733

StacktraceTop:
 QDeclarativePropertyCache::property (engine=<optimized out>, obj=0xc74690, name=@0x7fff24d39808, local=...) at qml/qdeclarativepropertycache.cpp:398
 QDeclarativeObjectScriptClass::queryProperty (this=0xcb2fc0, obj=<optimized out>, name=@0x7fff24d39808, flags=<optimized out>, evalContext=0x0, hints=...) at qml/qdeclarativeobjectscriptclass.cpp:167
 QDeclarativeObjectScriptClass::queryProperty (this=0xcb2fc0, object=<optimized out>, name=@0x7fff24d39808, flags=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:147
 QScript::DeclarativeObjectDelegate::getOwnPropertySlot (this=0xc98440, object=0x7fcddc8fafc0, exec=0x7fcddc942048, propertyName=..., slot=...) at bridge/qscriptdeclarativeobject.cpp:74
 fastGetOwnPropertySlot (slot=..., propertyName=..., exec=0x7fcddc942048, this=0x7fcddc8fafc0) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.h:382