*** qwineventnotifier.cpp       2018-08-28 20:53:29.239962200 +0200
--- qwineventnotifier.cpp       2018-08-28 21:28:49.659942200 +0200
*************** static void CALLBACK wfsoCallback(void *
*** 256,261 ****
--- 256,270 ----
  {
      QWinEventNotifierPrivate *nd = reinterpret_cast<QWinEventNotifierPrivate *>(context);
      QAbstractEventDispatcher *eventDispatcher = nd->threadData->eventDispatcher.load();
+
+     // Happens when Q(Core)Application is destroyed before QWinEventNotifier.
+     // https://bugreports.qt.io/browse/QTBUG-70214
+     if (!eventDispatcher)
+     {
+         qWarning("QWinEventNotifier: eventDispatcher was null in wfsoCallback");
+         return;
+     }
+
      QEventDispatcherWin32Private *edp = QEventDispatcherWin32Private::get(
                  static_cast<QEventDispatcherWin32 *>(eventDispatcher));