Index: /trunk/src/VBox/Main/glue/EventQueue.cpp
===================================================================
--- /trunk/src/VBox/Main/glue/EventQueue.cpp	(revision 41014)
+++ /trunk/src/VBox/Main/glue/EventQueue.cpp	(revision 41015)
@@ -238,14 +238,16 @@
 int EventQueue::uninit()
 {
-    Assert(sMainQueue);
-    /* Must process all events to make sure that no NULL event is left
-     * after this point. It would need to modify the state of sMainQueue. */
+    if (sMainQueue)
+    {
+        /* Must process all events to make sure that no NULL event is left
+         * after this point. It would need to modify the state of sMainQueue. */
 #ifdef RT_OS_DARWIN /* Do not process the native runloop, the toolkit may not be ready for it. */
-    sMainQueue->mEventQ->ProcessPendingEvents();
+        sMainQueue->mEventQ->ProcessPendingEvents();
 #else
-    sMainQueue->processEventQueue(0);
+        sMainQueue->processEventQueue(0);
 #endif
-    delete sMainQueue;
-    sMainQueue = NULL;
+        delete sMainQueue;
+        sMainQueue = NULL;
+    }
     return VINF_SUCCESS;
 }