SpdyAllowedAttribute makes the proxyAuthenticationRequired signal crash

1  QMetaObject::activate                                          qobject.cpp                             3658 0x7ffff6cee5a4 
2  QMetaObject::activate                                          qobject.cpp                             3648 0x7ffff6cef507 
3  QHttpNetworkReply::proxyAuthenticationRequired                 moc_qhttpnetworkreply_p.cpp             409  0x7ffff7328847 
4  QHttpNetworkConnectionPrivate::emitProxyAuthenticationRequired qhttpnetworkconnection.cpp              1546 0x7ffff72716a4 
5  QHttpNetworkConnectionChannel::_q_proxyAuthenticationRequired  qhttpnetworkconnectionchannel.cpp       1125 0x7ffff727722a 
6  QHttpNetworkConnectionChannel::qt_static_metacall              moc_qhttpnetworkconnectionchannel_p.cpp 130  0x7ffff727a300 
7  QMetaObject::activate                                          qobject.cpp                             3795 0x7ffff6ceebf9 
8  QMetaObject::activate                                          qobject.cpp                             3648 0x7ffff6cef507 
9  QAbstractSocket::proxyAuthenticationRequired                   moc_qabstractsocket.cpp                 406  0x7ffff72c7157 
10 QAbstractSocket::qt_static_metacall                            moc_qabstractsocket.cpp                 258  0x7ffff72cb400 
11 QMetaObject::activate                                          qobject.cpp                             3795 0x7ffff6ceebf9 
12 QMetaObject::activate                                          qobject.cpp                             3648 0x7ffff6cef507 
13 QAbstractSocket::proxyAuthenticationRequired                   moc_qabstractsocket.cpp                 406  0x7ffff72c7157 
14 QHttpSocketEngine::slotSocketReadNotification                  qhttpsocketengine.cpp                   652  0x7ffff72d760b 
15 QHttpSocketEngine::qt_static_metacall                          moc_qhttpsocketengine_p.cpp             110  0x7ffff732d825 
16 QMetaObject::activate                                          qobject.cpp                             3795 0x7ffff6ceebf9 
17 QMetaObject::activate                                          qobject.cpp                             3648 0x7ffff6cef507 
18 QIODevice::readyRead                                           moc_qiodevice.cpp                       189  0x7ffff6c03830 
19 QAbstractSocketPrivate::emitReadyRead                          qabstractsocket.cpp                     1307 0x7ffff72c7d73 
20 QAbstractSocketPrivate::canReadNotification                    qabstractsocket.cpp                     734  0x7ffff72c7e2c 
21 QReadNotifier::event                                           qnativesocketengine.cpp                 1274 0x7ffff72da191 
22 QApplicationPrivate::notify_helper                             qapplication.cpp                        3736 0x7ffff76e96fc 
23 QApplication::notify                                           qapplication.cpp                        3483 0x7ffff76f07f0 
24 QCoreApplication::notifyInternal2                              qcoreapplication.cpp                    1060 0x7ffff6cc31d8 
25 QCoreApplication::sendEvent                                    qcoreapplication.cpp                    1450 0x7ffff6cc338e 
26 socketNotifierSourceDispatch                                   qeventdispatcher_glib.cpp               106  0x7ffff6d1b188 
27 g_main_context_dispatch                                                                                     0x7ffff2542197 
28 ??                                                                                                          0x7ffff25423f0 
29 g_main_context_iteration                                                                                    0x7ffff254249c 
30 QEventDispatcherGlib::processEvents                            qeventdispatcher_glib.cpp               424  0x7ffff6d1a56b 
31 QEventLoop::exec                                               qeventloop.cpp                          225  0x7ffff6cc1b3a 
32 QThread::exec                                                  qthread.cpp                             531  0x7ffff6af48dc 
33 QThreadPrivate::start                                          qthread_unix.cpp                        361  0x7ffff6af5e13 
34 start_thread                                                   pthread_create.c                        333  0x7ffff56af6ba 
35 clone                                                          clone.S                                 109  0x7ffff61f541d