Qt Creator crash on Mac OS X 10.8.2, Qt 5 Beta 2

(gdb) bt
#0  0x000000010135b4ba in QObject::property ()
#1  0x00000001000f7d2b in QMacStyle::drawComplexControl (this=0x101c4b9d0, cc=QStyle::CC_ScrollBar, opt=0x1193b72d0, p=0x7fff5fbf4eb0, widget=0x1193a3220) at styles/qmacstyle_mac.mm:4910
#2  0x00000001001ef2b5 in QProxyStyle::drawComplexControl (this=0x101c4bb10, control=QStyle::CC_ScrollBar, option=0x1193b72d0, painter=0x7fff5fbf4eb0, widget=0x1193a3220) at qproxystyle.cpp:198
#3  0x000000010939f588 in ManhattanStyle::drawComplexControl (this=0x101c4bb10, control=QStyle::CC_ScrollBar, option=0x1193b72d0, painter=0x7fff5fbf4eb0, widget=0x1193a3220) at manhattanstyle.cpp:837
#4  0x0000000116c30510 in QStyleItem::paint (this=0x1193a21d0, painter=0x7fff5fbf4eb0) at qstyleitem.cpp:1015
#5  0x0000000116c309ef in non-virtual thunk to QStyleItem::paint(QPainter*, QStyleOptionGraphicsItem const*, QWidget*) () at qstyleitem.cpp:929
#6  0x000000010052f58f in _q_paintItem (item=0x1193a21e0, painter=0x7fff5fbf4eb0, option=0x1166ee4d0, widget=0x0, useWindowOpacity=false, painterStateProtection=false) at graphicsview/qgraphicsscene.cpp:4201
#7  0x000000010052fc34 in _q_paintIntoCache (pix=0x7fff5fbf5a58, item=0x1193a21e0, pixmapExposed=@0x7fff5fbf5570, itemToPixmap=@0x7fff5fbf55d0, renderHints={i = 2}, option=0x1166ee4d0, painterStateProtection=false) at graphicsview/qgraphicsscene.cpp:4269
#8  0x000000010052f2f0 in QGraphicsScenePrivate::drawItemHelper (this=0x1166ee2c0, item=0x1193a21e0, painter=0x7fff5fbf9a60, option=0x1166ee4d0, widget=0x1166d9fe0, painterStateProtection=false) at graphicsview/qgraphicsscene.cpp:4589
#9  0x00000001005315fb in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x1193a21e0, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x1193a2390, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4862
#10 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x1193a21e0, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#11 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x1193a0190, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4892
#12 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x1193a0190, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#13 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x11939f2b0, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4892
#14 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x11939f2b0, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#15 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x11939ca10, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x1021478a0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4892
#16 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x11939ca10, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#17 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x119399e70, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x119399fb0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4892
#18 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x119399e70, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#19 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x119397f60, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4892
#20 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x119397f60, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#21 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x116d05330, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4892
#22 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x116d05330, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#23 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x116d15230, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x1166f73d0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4892
#24 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x116d15230, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#25 0x0000000100531914 in QGraphicsScenePrivate::draw (this=0x1166ee2c0, item=0x1166f6cc0, painter=0x7fff5fbf9a60, viewTransform=0x0, transformPtr=0x1166f71a0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4892
#26 0x0000000100530ecf in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1166ee2c0, item=0x1166f6cc0, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4752
#27 0x0000000100530159 in QGraphicsScenePrivate::drawItems (this=0x1166ee2c0, painter=0x7fff5fbf9a60, viewTransform=0x0, exposedRegion=0x10285daa0, widget=0x1166d9fe0) at graphicsview/qgraphicsscene.cpp:4635
#28 0x0000000100561b61 in QGraphicsView::paintEvent (this=0x1166d86a0, event=0x7fff5fbfafc8) at graphicsview/qgraphicsview.cpp:3473
#29 0x00000001101b0aad in QDeclarativeView::paintEvent ()
#30 0x0000000100179080 in QWidget::event (this=0x1166d86a0, event=0x7fff5fbfafc8) at qwidget.cpp:7990
#31 0x00000001002c783d in QFrame::event (this=0x1166d86a0, e=0x7fff5fbfafc8) at widgets/qframe.cpp:534
#32 0x0000000100376449 in QAbstractScrollArea::viewportEvent (this=0x1166d86a0, e=0x7fff5fbfafc8) at widgets/qabstractscrollarea.cpp:1154
#33 0x000000010055ef59 in QGraphicsView::viewportEvent (this=0x1166d86a0, event=0x7fff5fbfafc8) at graphicsview/qgraphicsview.cpp:2868
#34 0x000000010037805f in QAbstractScrollAreaPrivate::viewportEvent (this=0x10285d600, event=0x7fff5fbfafc8) at qabstractscrollarea_p.h:105
#35 0x0000000100377a65 in QAbstractScrollAreaFilter::eventFilter (this=0x1166d9c60, o=0x1166d9fe0, e=0x7fff5fbfafc8) at qabstractscrollarea_p.h:121
#36 0x000000010132d8e7 in QCoreApplicationPrivate::sendThroughObjectEventFilters ()
#37 0x00000001001204ab in QApplicationPrivate::notify_helper (this=0x101c00dc0, receiver=0x1166d9fe0, e=0x7fff5fbfafc8) at qapplication.cpp:3583
#38 0x0000000100125153 in QApplication::notify (this=0x7fff5fbffac8, receiver=0x1166d9fe0, e=0x7fff5fbfafc8) at qapplication.cpp:3552
#39 0x000000010132d5de in QCoreApplication::notifyInternal ()
#40 0x0000000100128a4f in QCoreApplication::sendSpontaneousEvent (receiver=0x1166d9fe0, event=0x7fff5fbfafc8) at qcoreapplication.h:206
#41 0x0000000100171e7f in QWidgetPrivate::drawWidget (this=0x1166da010, pdev=0x10197f240, rgn=@0x7fff5fbfb368, offset=@0x7fff5fbfb360, flags=36, sharedPainter=0x0, backingStore=0x10ab04260) at qwidget.cpp:5094
#42 0x00000001001365ba in QWidgetBackingStore::sync (this=0x10ab04260) at qwidgetbackingstore.cpp:1084
#43 0x0000000100167ee6 in QWidgetPrivate::syncBackingStore (this=0x101945720) at qwidget.cpp:1663
#44 0x00000001001795d2 in QWidget::event (this=0x101945580, event=0x117090b60) at qwidget.cpp:8128
#45 0x00000001002e4c91 in QMainWindow::event (this=0x101945580, event=0x117090b60) at widgets/qmainwindow.cpp:1471
#46 0x00000001001204d5 in QApplicationPrivate::notify_helper (this=0x101c00dc0, receiver=0x101945580, e=0x117090b60) at qapplication.cpp:3587
#47 0x0000000100125153 in QApplication::notify (this=0x7fff5fbffac8, receiver=0x101945580, e=0x117090b60) at qapplication.cpp:3552
#48 0x000000010132e1b4 in QCoreApplicationPrivate::sendPostedEvents ()
#49 0x00000001005354f2 in QGraphicsViewPrivate::dispatchPendingUpdateRequests (this=0x10285d600) at qgraphicsview_p.h:200
#50 0x000000010051b45a in QGraphicsScenePrivate::_q_processDirtyItems (this=0x1166ee2c0) at graphicsview/qgraphicsscene.cpp:511
#51 0x000000010053441a in QGraphicsScene::qt_static_metacall (_o=0x1166eb360, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0x114f00ec0) at moc_qgraphicsscene.cpp:167
#52 0x0000000101354148 in QObject::event ()
#53 0x000000010052864b in QGraphicsScene::event (this=0x1166eb360, event=0x114f01b20) at graphicsview/qgraphicsscene.cpp:3447
#54 0x00000001001204d5 in QApplicationPrivate::notify_helper (this=0x101c00dc0, receiver=0x1166eb360, e=0x114f01b20) at qapplication.cpp:3587
#55 0x000000010012218e in QApplication::notify (this=0x7fff5fbffac8, receiver=0x1166eb360, e=0x114f01b20) at qapplication.cpp:3018
#56 0x000000010132e1b4 in QCoreApplicationPrivate::sendPostedEvents ()
#57 0x0000000100d9c151 in QWindowSystemInterface::sendWindowSystemEvents ()
#58 0x0000000103714f85 in QCocoaEventDispatcherPrivate::processPostedEvents ()
#59 0x000000010371588b in QCocoaEventDispatcherPrivate::postedEventsSourceCallback ()
#60 0x00007fff96c70101 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ ()
#61 0x00007fff96c6fa25 in __CFRunLoopDoSources0 ()
#62 0x00007fff96c92dc5 in __CFRunLoopRun ()
#63 0x00007fff96c926b2 in CFRunLoopRunSpecific ()
#64 0x00007fff939fa0a4 in RunCurrentEventLoopInMode ()
#65 0x00007fff939f9d84 in ReceiveNextEventCommon ()
#66 0x00007fff939f9cd3 in BlockUntilNextEventMatchingListInMode ()
#67 0x00007fff8efc7613 in _DPSNextEvent ()
#68 0x00007fff8efc6ed2 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#69 0x00007fff8efbe283 in -[NSApplication run] ()
#70 0x00000001037145b5 in QCocoaEventDispatcher::processEvents ()
#71 0x000000010132ae13 in QEventLoop::exec ()
#72 0x000000010132db45 in QCoreApplication::exec ()
#73 0x0000000100121cc6 in QApplication::exec () at qapplication.cpp:2894
#74 0x000000010000bb42 in main (argc=1, argv=0x7fff5fbffb40) at main.cpp:513
(gdb)