Application: kwin (4.8.5 (4.8.5))
KDE Platform Version: 4.8.5 (4.8.5)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-29-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- What I was doing when the application crashed: I was grouping & ungrouping several Libreoffice Calc windows, while KWin crashed. I have had the same some time ago but using Aurorae (and I understand that that bug was fixed), but this is the first time it happens using Oxygen.

OS: Kubuntu 12.04, with KDE 4.8.5. Linux 3.2.0-29
Card: NVidia 8200 GM
NVidia blob: 295.40

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc5368eb7c0 (LWP 1858))]

Thread 3 (Thread 0x7fc51202a700 (LWP 1863)):
#0  0x00007fff907ff8de in ?? ()
#1  0x00007fc52b38215d in __GI_clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:116
#2  0x00007fc53176ebb4 in do_gettime (frac=0x7fc512029b68, sec=0x7fc512029b60) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007fc531846b8d in QTimerInfoList::updateCurrentTime (this=0x7fc508001198) at kernel/qeventdispatcher_unix.cpp:343
#5  0x00007fc531846ec3 in QTimerInfoList::timerWait (this=0x7fc508001198, tm=...) at kernel/qeventdispatcher_unix.cpp:450
#6  0x00007fc531848d31 in QEventDispatcherUNIX::processEvents (this=0x7fc508000910, flags=...) at kernel/qeventdispatcher_unix.cpp:913
#7  0x00007fc531815c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007fc531815ed7 in QEventLoop::exec (this=0x7fc512029cd0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007fc531714fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007fc5317f59ff in QInotifyFileSystemWatcherEngine::run (this=0x1841cc0) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x00007fc531717fcb in QThreadPrivate::start (arg=0x1841cc0) at thread/qthread_unix.cpp:298
#12 0x00007fc532369b74 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#13 0x00007fc52a93ee9a in start_thread (arg=0x7fc51202a700) at pthread_create.c:308
#14 0x00007fc5361084bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc511829700 (LWP 1864)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc532bbe222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fc532bbe259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fc532369b74 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#4  0x00007fc52a93ee9a in start_thread (arg=0x7fc511829700) at pthread_create.c:308
#5  0x00007fc5361084bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fc5368eb7c0 (LWP 1858)):
[KCrash Handler]
#6  ref (this=0x0) at /usr/include/qt4/QtCore/qatomic_x86_64.h:121
#7  QString (other=..., this=0x7fff907609b0) at /usr/include/qt4/QtCore/qstring.h:726
#8  operator QString (this=<optimized out>) at /usr/include/qt4/QtCore/qstringbuilder.h:155
#9  KWin::Client::caption (this=0x38b5620, full=true) at ../../kwin/client.cpp:1913
#10 0x00007fc536457435 in KWin::Workspace::groupTabPopupAboutToShow (this=0x13b4610) at ../../kwin/useractions.cpp:409
#11 0x00007fc5364178ba in qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at ./workspace.moc:360
#12 KWin::Workspace::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./workspace.moc:265
#13 0x00007fc53182b281 in QMetaObject::activate (sender=0x35223e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#14 0x00007fc530fe75e2 in QMenu::popup (this=0x35223e0, p=..., atAction=0x0) at widgets/qmenu.cpp:1832
#15 0x00007fc530fe939b in QMenu::internalDelayedPopup (this=0x3b23370) at widgets/qmenu.cpp:3045
#16 0x00007fc530fea794 in QMenu::timerEvent (this=0x3b23370, e=<optimized out>) at widgets/qmenu.cpp:2905
#17 0x00007fc531830179 in QObject::event (this=0x3b23370, e=<optimized out>) at kernel/qobject.cpp:1157
#18 0x00007fc530be9b7b in QWidget::event (this=0x3b23370, event=0x7fff907616e0) at kernel/qwidget.cpp:8821
#19 0x00007fc530fec80b in QMenu::event (this=0x3b23370, e=0x7fff907616e0) at widgets/qmenu.cpp:2469
#20 0x00007fc530b99894 in notify_helper (e=0x7fff907616e0, receiver=0x3b23370, this=0x117aa10) at kernel/qapplication.cpp:4559
#21 QApplicationPrivate::notify_helper (this=0x117aa10, receiver=0x3b23370, e=0x7fff907616e0) at kernel/qapplication.cpp:4531
#22 0x00007fc530b9e713 in QApplication::notify (this=0x7fff90762df0, receiver=0x3b23370, e=0x7fff907616e0) at kernel/qapplication.cpp:4420
#23 0x00007fc535be33f6 in KApplication::notify (this=0x7fff90762df0, receiver=0x3b23370, event=0x7fff907616e0) at ../../kdeui/kernel/kapplication.cpp:311
#24 0x00007fc531816e9c in QCoreApplication::notifyInternal (this=0x7fff90762df0, receiver=0x3b23370, event=0x7fff907616e0) at kernel/qcoreapplication.cpp:876
#25 0x00007fc5318481f2 in sendEvent (event=0x7fff907616e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#26 QTimerInfoList::activateTimers (this=0x117b638) at kernel/qeventdispatcher_unix.cpp:611
#27 0x00007fc531848cb4 in QEventDispatcherUNIX::processEvents (this=0x10c7ad0, flags=...) at kernel/qeventdispatcher_unix.cpp:930
#28 0x00007fc530c42bf8 in QEventDispatcherX11::processEvents (this=0x10c7ad0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#29 0x00007fc531815c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007fc531815ed7 in QEventLoop::exec (this=0x7fff90761a40, flags=...) at kernel/qeventloop.cpp:204
#31 0x00007fc530fe8131 in QMenu::exec (this=<optimized out>, p=..., action=0x0) at widgets/qmenu.cpp:2113
#32 0x00007fc536460479 in showWindowMenu (cl=<optimized out>, pos=..., this=0x13b4610) at ../../kwin/useractions.cpp:1604
#33 KWin::Workspace::showWindowMenu (this=0x13b4610, pos=..., cl=<optimized out>) at ../../kwin/useractions.cpp:1586
#34 0x00007fc536426bc7 in showWindowMenu (cl=<optimized out>, pos=..., this=<optimized out>) at ../../kwin/scripting/./../workspace.h:1047
#35 KWin::ClientGroup::displayClientMenu (this=<optimized out>, c=<optimized out>, pos=...) at ../../kwin/clientgroup.cpp:241
#36 0x00007fc518ad5f16 in Oxygen::Client::mousePressEvent (this=0x3b3ab10, event=0x7fff90762200) at ../../../../kwin/clients/oxygen/oxygenclient.cpp:1625
#37 0x00007fc518ad604a in Oxygen::Client::eventFilter (this=0x3b3ab10, object=0x3687b70, event=0x7fff90762200) at ../../../../kwin/clients/oxygen/oxygenclient.cpp:1357
#38 0x00007fc531817028 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x3687b70, event=0x7fff90762200) at kernel/qcoreapplication.cpp:986
#39 0x00007fc530b9985f in notify_helper (e=0x7fff90762200, receiver=0x3687b70, this=0x117aa10) at kernel/qapplication.cpp:4555
#40 QApplicationPrivate::notify_helper (this=0x117aa10, receiver=0x3687b70, e=0x7fff90762200) at kernel/qapplication.cpp:4531
#41 0x00007fc530b9f0bf in QApplication::notify (this=<optimized out>, receiver=0x3687b70, e=0x7fff90762200) at kernel/qapplication.cpp:4102
#42 0x00007fc535be33f6 in KApplication::notify (this=0x7fff90762df0, receiver=0x3687b70, event=0x7fff90762200) at ../../kdeui/kernel/kapplication.cpp:311
#43 0x00007fc531816e9c in QCoreApplication::notifyInternal (this=0x7fff90762df0, receiver=0x3687b70, event=0x7fff90762200) at kernel/qcoreapplication.cpp:876
#44 0x00007fc530b9a862 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#45 QApplicationPrivate::sendMouseEvent (receiver=0x3687b70, event=0x7fff90762200, alienWidget=0x0, nativeWidget=0x3687b70, buttonDown=0x0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3170
#46 0x00007fc530c19bf5 in QETWidget::translateMouseEvent (this=0x3687b70, event=<optimized out>) at kernel/qapplication_x11.cpp:4617
#47 0x00007fc530c18bae in QApplication::x11ProcessEvent (this=0x7fff90762df0, event=0x7fff90762ae0) at kernel/qapplication_x11.cpp:3732
#48 0x00007fc530c42b3a in QEventDispatcherX11::processEvents (this=0x10c7ad0, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#49 0x00007fc531815c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#50 0x00007fc531815ed7 in QEventLoop::exec (this=0x7fff90762d30, flags=...) at kernel/qeventloop.cpp:204
#51 0x00007fc53181af67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#52 0x00007fc536433c36 in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../kwin/main.cpp:541
#53 0x00007fc53603776d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=3, ubp_av=0x7fff90763518, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff90763508) at libc-start.c:226
#54 0x0000000000400661 in _start ()

This bug may be a duplicate of or related to bug 278275.

Possible duplicates by query: bug 278275, bug 263717, bug 257390.

Reported using DrKonqi