Application: kwinactive_gles (4.9.5)
KDE Platform Version: 4.9.5
Qt Version: 4.8.3
Operating System: Linux 3.5.0-37-generic i686
Distribution: Ubuntu 12.10

-- Information about the crash:
- What I was doing when the application crashed:
Tried to pull down bar -- Kwin crashed.
- Unusual behavior I noticed:
Peek&Launch bar has black background (don't know if it's related)

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwinactive_gles), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1d06740 (LWP 1459))]

Thread 2 (Thread 0xb0c27b40 (LWP 1565)):
#0  0xb777f424 in __kernel_vsyscall ()
#1  0xb2d3e96b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb758e6ec in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0xb66fa1cd in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb66fa1ff in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb2d3ad4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0xb7580dde in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb1d06740 (LWP 1459)):
[KCrash Handler]
#7  QObject::setProperty (this=0x0, name=0xb774f30e "screenWidth", value=...) at kernel/qobject.cpp:3689
#8  0xb773739b in KWin::TabBox::DeclarativeView::showEvent (this=0x9eba468, event=0xbfc55a44) at ../../../kwin/tabbox/declarative.cpp:164
#9  0xb55c5d48 in QWidget::event (this=0x9eba468, event=0xbfc55a44) at kernel/qwidget.cpp:8578
#10 0xb59d5f15 in QFrame::event (this=0x9eba468, e=0xbfc55a44) at widgets/qframe.cpp:557
#11 0xb5a6838c in QAbstractScrollArea::event (this=0x9eba468, e=0xbfc55a44) at widgets/qabstractscrollarea.cpp:996
#12 0xb5c1e65a in QGraphicsView::event (this=0x9eba468, event=0xbfc55a44) at graphicsview/qgraphicsview.cpp:2740
#13 0xb556c39c in QApplicationPrivate::notify_helper (this=0x982e828, receiver=0x9eba468, e=0xbfc55a44) at kernel/qapplication.cpp:4562
#14 0xb5570e54 in QApplication::notify (this=0x982e828, receiver=0x9eba468, e=0xbfc55a44) at kernel/qapplication.cpp:4423
#15 0xb723dec1 in KApplication::notify (this=0xbfc56698, receiver=0x9eba468, event=0xbfc55a44) at ../../kdeui/kernel/kapplication.cpp:311
#16 0xb769e9af in notify (e=0xbfc55a44, o=0x9eba468, this=0xbfc56698) at ../../../kwin/main.cpp:371
#17 KWin::Application::notify (this=0xbfc56698, o=0x9eba468, e=0xbfc55a44) at ../../../kwin/main.cpp:367
#18 0xb607b78e in QCoreApplication::notifyInternal (this=0xbfc56698, receiver=0x9eba468, event=0xbfc55a44) at kernel/qcoreapplication.cpp:915
#19 0xb55c82f2 in sendEvent (event=0xbfc55a44, receiver=0x9eba468) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#20 QWidgetPrivate::show_helper (this=this@entry=0x9910f80) at kernel/qwidget.cpp:7551
#21 0xb55c8625 in QWidget::setVisible (this=0x9eba468, visible=true) at kernel/qwidget.cpp:7773
#22 0xb7738f28 in show (this=0x9eba468) at /usr/include/qt4/QtGui/qwidget.h:494
#23 KWin::TabBox::TabBoxHandler::show (this=0x990f550) at ../../../kwin/tabbox/tabboxhandler.cpp:257
#24 0xb772e465 in KWin::TabBox::TabBox::show (this=this@entry=0x990fa68) at ../../../kwin/tabbox/tabbox.cpp:680
#25 0xb772eed4 in KWin::TabBox::TabBox::openEmbedded (this=this@entry=0x990fa68, wid=37748774, offset=..., size=..., horizontalAlignment=1, verticalAlignment=64, layout=...) at ../../../kwin/tabbox/tabbox.cpp:1177
#26 0xb7732223 in qt_static_metacall (_a=0xbfc55ccc, _id=10, _o=0x990fa68, _c=<optimized out>) at ./tabbox.moc:144
#27 KWin::TabBox::TabBox::qt_static_metacall (_o=0x990fa68, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0xbfc55ccc) at ./tabbox.moc:128
#28 0xb773257c in KWin::TabBox::TabBox::qt_metacall (this=0x990fa68, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0xbfc55ccc) at ./tabbox.moc:215
#29 0xb62026ae in QDBusConnectionPrivate::deliverCall (this=0x9827f40, object=0x990fa68, msg=..., metaTypes=..., slotIdx=-1217072370) at qdbusintegrator.cpp:947
#30 0xb620376a in QDBusConnectionPrivate::activateCall (this=0x9827f40, object=0x990fa68, flags=240, msg=...) at qdbusintegrator.cpp:850
#31 0xb6203f12 in QDBusConnectionPrivate::activateObject (this=0x9827f40, node=..., msg=..., pathStartPos=1) at qdbusintegrator.cpp:1423
#32 0xb6204308 in QDBusActivateObjectEvent::placeMetaCall (this=0x993b6a0) at qdbusintegrator.cpp:1537
#33 0xb6091eeb in QObject::event (this=0x990fa68, e=0x993b6a0) at kernel/qobject.cpp:1195
#34 0xb556c39c in QApplicationPrivate::notify_helper (this=0x982e828, receiver=0x990fa68, e=0x993b6a0) at kernel/qapplication.cpp:4562
#35 0xb5570daf in QApplication::notify (this=0x993b6a0, receiver=0x990fa68, e=0x993b6a0) at kernel/qapplication.cpp:3944
#36 0xb723dec1 in KApplication::notify (this=0xbfc56698, receiver=0x990fa68, event=0x993b6a0) at ../../kdeui/kernel/kapplication.cpp:311
#37 0xb769e9af in notify (e=0x993b6a0, o=0x990fa68, this=0xbfc56698) at ../../../kwin/main.cpp:371
#38 KWin::Application::notify (this=0xbfc56698, o=0x990fa68, e=0x993b6a0) at ../../../kwin/main.cpp:367
#39 0xb607b78e in QCoreApplication::notifyInternal (this=0xbfc56698, receiver=0x990fa68, event=0x993b6a0) at kernel/qcoreapplication.cpp:915
#40 0xb607f97d in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x97f7130) at kernel/qcoreapplication.cpp:1539
#42 0xb607fc0c in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1432
#43 0xb562382d in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#44 QEventDispatcherX11::processEvents (this=0x97f7ea0, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#45 0xb607a26c in QEventLoop::processEvents (this=this@entry=0xbfc56518, flags=...) at kernel/qeventloop.cpp:149
#46 0xb607a561 in QEventLoop::exec (this=0xbfc56518, flags=...) at kernel/qeventloop.cpp:204
#47 0xb607fcba in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#48 0xb5569fc4 in QApplication::exec () at kernel/qapplication.cpp:3823
#49 0xb76a1319 in kdemain (argc=1, argv=0xbfc56784) at ../../../kwin/main.cpp:545
#50 0x0804856b in main (argc=1, argv=0xbfc56784) at kwin_gles_dummy.cpp:3

Reported using DrKonqi