Mac OSX: Qt Designer crashes

GNU gdb 6.3.50-20050815 (Apple version gdb-1824) (Wed Feb  6 22:51:23 UTC 2013)
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This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared libraries
[?1034h(gdb) run
Starting program: /Users/fkleint/dev/qt-5/qtbase/bin/Designer.app/Contents/MacOS/Designer 


Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000
QCocoaWindow::childWindowAt (this=0x111d73010, windowPoint={xp = 1246, yp = 808}) at qcocoawindow.mm:1001
1001	                if (platformWindow->isExposed())
(gdb) where
#0  QCocoaWindow::childWindowAt (this=0x111d73010, windowPoint={xp = 1246, yp = 808}) at qcocoawindow.mm:1001
#1  0x0000000106d1bff9 in -[QNSView mouseEntered:] (self=0x111d730b0, _cmd=0x7fff8b6fb9ae, theEvent=0x1056db5b0) at qnsview.mm:678
#2  0x00007fff8af9a54f in -[NSApplication sendEvent:] ()
#3  0x0000000106d2bdcd in -[QNSApplication sendEvent:] (self=0x10530e0c0, _cmd=0x7fff8b6e7437, event=0x1056db5b0) at qcocoaapplication.mm:183
#4  0x00007fff8b10369a in -[NSApplication _realDoModalLoop:peek:] ()
#5  0x00007fff8b103d6e in -[NSApplication runModalSession:] ()
#6  0x0000000106d2592e in QCocoaEventDispatcher::processEvents (this=0x10530a010, flags={i = 100}) at qcocoaeventdispatcher.mm:406
#7  0x000000010316768a in QEventLoop::processEvents (this=0x7fff5fbfbc80, flags={i = 100}) at qeventloop.cpp:136
#8  0x00000001031678bd in QEventLoop::exec (this=0x7fff5fbfbc80, flags={i = 64}) at qeventloop.cpp:212
#9  0x0000000101663bac in QDialog::exec (this=0x112625250) at dialogs/qdialog.cpp:529
#10 0x000000010003f760 in QDesignerActions::showNewFormDialog (this=0x11173d9c0, fileName=@0x7fff5fbfbd80) at /Users/fkleint/dev/qt-5/qttools/src/designer/src/designer/qdesigner_actions.cpp:585
#11 0x000000010003f65d in QDesignerActions::createForm (this=0x11173d9c0) at /Users/fkleint/dev/qt-5/qttools/src/designer/src/designer/qdesigner_actions.cpp:573
#12 0x00000001000262b3 in QDesigner::callCreateForm (this=0x7fff5fbff990) at /Users/fkleint/dev/qt-5/qttools/src/designer/src/designer/qdesigner.cpp:316
#13 0x000000010005abd5 in QDesigner::qt_static_metacall (_o=0x7fff5fbff990, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0x7fff5fbfc160) at .moc/debug-shared/moc_qdesigner.cpp:87
#14 0x00000001031bfb31 in QMetaObject::activate (sender=0x1056a8920, signalOffset=3, local_signal_index=0, argv=0x0) at qobject.cpp:3479
#15 0x00000001031bf01d in QMetaObject::activate (sender=0x1056a8920, m=0x1035198c0, local_signal_index=0, argv=0x0) at qobject.cpp:3354
#16 0x00000001031ce34b in QSingleShotTimer::timeout (this=0x1056a8920) at qtimer.moc:121
#17 0x00000001031ce30b in QSingleShotTimer::timerEvent (this=0x1056a8920) at qtimer.cpp:287
#18 0x00000001031b74e2 in QObject::event (this=0x1056a8920, e=0x7fff5fbfd2d0) at qobject.cpp:1051
#19 0x00000001013bda7f in QApplicationPrivate::notify_helper (this=0x103d06f70, receiver=0x1056a8920, e=0x7fff5fbfd2d0) at qapplication.cpp:3442
#20 0x00000001013bf6a8 in QApplication::notify (this=0x7fff5fbff990, receiver=0x1056a8920, e=0x7fff5fbfd2d0) at qapplication.cpp:2845
#21 0x000000010316bcff in QCoreApplication::notifyInternal (this=0x7fff5fbff990, receiver=0x1056a8920, event=0x7fff5fbfd2d0) at qcoreapplication.cpp:871
#22 0x0000000103170c54 in QCoreApplication::sendEvent (receiver=0x1056a8920, event=0x7fff5fbfd2d0) at qcoreapplication.h:232
#23 0x00000001031ff5cc in QTimerInfoList::activateTimers (this=0x10530b890) at qtimerinfo_unix.cpp:643
#24 0x0000000106d24d24 in QCocoaEventDispatcherPrivate::activateTimersSourceCallback (info=0x10530b810) at qcocoaeventdispatcher.mm:132
#25 0x00007fff91d70b31 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ ()
#26 0x00007fff91d70455 in __CFRunLoopDoSources0 ()
#27 0x00007fff91d937f5 in __CFRunLoopRun ()
#28 0x00007fff91d930e2 in CFRunLoopRunSpecific ()
#29 0x00007fff88299eb4 in RunCurrentEventLoopInMode ()
#30 0x00007fff88299c52 in ReceiveNextEventCommon ()
#31 0x00007fff88299ae3 in BlockUntilNextEventMatchingListInMode ()
#32 0x00007fff8aeb9563 in _DPSNextEvent ()
#33 0x00007fff8aeb8e22 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#34 0x00007fff8b103639 in -[NSApplication _realDoModalLoop:peek:] ()
#35 0x00007fff8b1038fe in -[NSApplication runModalForWindow:] ()
#36 0x00007fff8b0f6364 in -[NSAlert runModal] ()
#37 0x00007fff8ae0ce54 in __54-[NSPersistentUIManager promptToIgnorePersistentState]_block_invoke_0 ()
#38 0x00007fff8ae0c9cf in -[NSApplication _suppressFinishLaunchingFromEventHandlersWhilePerformingBlock:] ()
#39 0x00007fff8ae0c96e in -[NSPersistentUIManager promptToIgnorePersistentState] ()
#40 0x00007fff8aebd636 in -[NSApplication _reopenWindowsAsNecessaryIncludingRestorableState:registeringAsReady:completionHandler:] ()
#41 0x00007fff8aebd475 in -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] ()
#42 0x00007fff8aebd07c in -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] ()
#43 0x00007fff8bb1470b in -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] ()
#44 0x00007fff8bb1456d in _NSAppleEventManagerGenericHandler ()
#45 0x00007fff8dbfe078 in aeDispatchAppleEvent ()
#46 0x00007fff8dbfded9 in dispatchEventAndSendReply ()
#47 0x00007fff8dbfdd99 in aeProcessAppleEvent ()
#48 0x00007fff882a4709 in AEProcessAppleEvent ()
#49 0x00007fff8aeb9866 in _DPSNextEvent ()
#50 0x00007fff8aeb8e22 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#51 0x00007fff8aeb01d3 in -[NSApplication run] ()
#52 0x0000000106d25a38 in QCocoaEventDispatcher::processEvents (this=0x10530a010, flags={i = 36}) at qcocoaeventdispatcher.mm:418
#53 0x000000010316768a in QEventLoop::processEvents (this=0x7fff5fbff8f0, flags={i = 36}) at qeventloop.cpp:136
#54 0x00000001031678bd in QEventLoop::exec (this=0x7fff5fbff8f0, flags={i = 0}) at qeventloop.cpp:212
#55 0x000000010316c4c2 in QCoreApplication::exec () at qcoreapplication.cpp:1124
#56 0x000000010243c186 in QGuiApplication::exec () at qguiapplication.cpp:1196
#57 0x00000001013bf049 in QApplication::exec () at qapplication.cpp:2689
#58 0x00000001000246c1 in main (argc=1, argv=0x7fff5fbffa28) at /Users/fkleint/dev/qt-5/qttools/src/designer/src/designer/main.cpp:57
Current language:  auto; currently objective-c++
Warning: the current language does not match this frame.
(gdb) quit