Application: kwin (4.11.9)
KDE Platform Version: 4.13.1
Qt Version: 4.8.6
Operating System: Linux 3.13.0-24-generic x86_64
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:I was replying to an email with Florence, an on screen keyboard.

-- 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 0x7f37d2481800 (LWP 9998))]

Thread 2 (Thread 0x7f37b213f700 (LWP 10004)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f37d0e35ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f37d0e36039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f37c9948182 in start_thread (arg=0x7f37b213f700) at pthread_create.c:312
#4  0x00007f37d1c5330d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f37d2481800 (LWP 9998)):
[KCrash Handler]
#6  indexOfMethodRelative<8> (normalizeStringData=<optimized out>, method=0x7f37cb97b372 "_q_actionTriggered()", baseObject=0x7fffb18d3ad8) at kernel/qmetaobject.cpp:530
#7  QMetaObjectPrivate::indexOfSlotRelative (m=m@entry=0x7fffb18d3ad8, slot=slot@entry=0x7f37cb97b372 "_q_actionTriggered()", normalizeStringData=normalizeStringData@entry=false) at kernel/qmetaobject.cpp:665
#8  0x00007f37cbfa2d56 in QObject::connect (sender=0x2babd20, signal=0x7f37cb97b388 "triggered()", signal@entry=0x7f37cb97b387 "2triggered()", receiver=receiver@entry=0x288eba0, method=0x7f37cb97b372 "_q_actionTriggered()", method@entry=0x7f37cb97b371 "1_q_actionTriggered()", type=Qt::AutoConnection, type@entry=Qt::AutoCompatConnection) at kernel/qobject.cpp:2587
#9  0x00007f37cb31ecc0 in QActionGroup::addAction (this=0x288eba0, a=a@entry=0x2babd20) at kernel/qactiongroup.cpp:182
#10 0x00007f37d1fc1e9c in KWin::UserActionsMenu::activityPopupAboutToShow (this=0x1d82ac0) at ../../kwin/useractions.cpp:723
#11 0x00007f37cbfa187a in QMetaObject::activate (sender=sender@entry=0x2964dd0, m=m@entry=0x7f37cbddb340 <QMenu::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#12 0x00007f37cb74b1c0 in QMenu::aboutToShow (this=this@entry=0x2964dd0) at .moc/release-shared/moc_qmenu.cpp:164
#13 0x00007f37cb74e0bd in QMenu::popup (this=0x2964dd0, p=..., atAction=atAction@entry=0x0) at widgets/qmenu.cpp:1844
#14 0x00007f37cb74f6fb in QMenu::internalDelayedPopup (this=this@entry=0x2555c00) at widgets/qmenu.cpp:3057
#15 0x00007f37cb751174 in QMenu::timerEvent (this=0x2555c00, e=<optimized out>) at widgets/qmenu.cpp:2917
#16 0x00007f37cbfa5a31 in QObject::event (this=this@entry=0x2555c00, e=e@entry=0x7fffb18d43d0) at kernel/qobject.cpp:1156
#17 0x00007f37cb37155b in QWidget::event (this=this@entry=0x2555c00, event=event@entry=0x7fffb18d43d0) at kernel/qwidget.cpp:8846
#18 0x00007f37cb7537bb in QMenu::event (this=0x2555c00, e=0x7fffb18d43d0) at widgets/qmenu.cpp:2481
#19 0x00007f37cb321e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1c4f6f0, receiver=receiver@entry=0x2555c00, e=e@entry=0x7fffb18d43d0) at kernel/qapplication.cpp:4567
#20 0x00007f37cb3284a0 in QApplication::notify (this=this@entry=0x7fffb18d5410, receiver=receiver@entry=0x2555c00, e=e@entry=0x7fffb18d43d0) at kernel/qapplication.cpp:4353
#21 0x00007f37d0889d1a in KApplication::notify (this=0x7fffb18d5410, receiver=0x2555c00, event=0x7fffb18d43d0) at ../../kdeui/kernel/kapplication.cpp:311
#22 0x00007f37cbf8d4dd in QCoreApplication::notifyInternal (this=0x7fffb18d5410, receiver=0x2555c00, event=0x7fffb18d43d0) at kernel/qcoreapplication.cpp:953
#23 0x00007f37cbfbd323 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#24 QTimerInfoList::activateTimers (this=0x1c50318) at kernel/qeventdispatcher_unix.cpp:621
#25 0x00007f37cbfbd3a0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x1bd3af0) at kernel/qeventdispatcher_unix.cpp:878
#26 0x00007f37cbfbdd20 in QEventDispatcherUNIX::processEvents (this=this@entry=0x1bd3af0, flags=...) at kernel/qeventdispatcher_unix.cpp:940
#27 0x00007f37cb3c44d6 in QEventDispatcherX11::processEvents (this=0x1bd3af0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#28 0x00007f37cbf8c0af in QEventLoop::processEvents (this=this@entry=0x7fffb18d4720, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f37cbf8c3a5 in QEventLoop::exec (this=this@entry=0x7fffb18d4720, flags=...) at kernel/qeventloop.cpp:204
#30 0x00007f37cb752587 in QMenu::exec (this=0x2555c00, p=..., action=action@entry=0x0) at widgets/qmenu.cpp:2125
#31 0x00007f37d1fbe78a in KWin::UserActionsMenu::show (this=0x1d82ac0, pos=..., cl=...) at ../../kwin/useractions.cpp:167
#32 0x00007f37d1fbe84b in KWin::Workspace::showWindowMenu (this=0x1dcaeb0, pos=..., cl=0x2acf340) at ../../kwin/useractions.cpp:1827
#33 0x00007f37d1fb2fc2 in KWin::Bridge::showWindowMenu (this=0x2ad02d0, p=..., id=<optimized out>) at ../../kwin/bridge.cpp:110
#34 0x00007f37b31c765e in Oxygen::Client::mousePressEvent (this=0x25f6130, event=0x7fffb18d4c90) at ../../../../kwin/clients/oxygen/oxygenclient.cpp:1669
#35 0x00007f37b31d0bda in Oxygen::Client::eventFilter (this=0x25f6130, object=0x1eb42c0, event=0x7fffb18d4c90) at ../../../../kwin/clients/oxygen/oxygenclient.cpp:1358
#36 0x00007f37cbf8d646 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1c4f6f0, receiver=receiver@entry=0x1eb42c0, event=event@entry=0x7fffb18d4c90) at kernel/qcoreapplication.cpp:1063
#37 0x00007f37cb321e0c in QApplicationPrivate::notify_helper (this=this@entry=0x1c4f6f0, receiver=receiver@entry=0x1eb42c0, e=e@entry=0x7fffb18d4c90) at kernel/qapplication.cpp:4563
#38 0x00007f37cb3285dd in QApplication::notify (this=this@entry=0x7fffb18d5410, receiver=receiver@entry=0x1eb42c0, e=e@entry=0x7fffb18d4c90) at kernel/qapplication.cpp:4110
#39 0x00007f37d0889d1a in KApplication::notify (this=0x7fffb18d5410, receiver=0x1eb42c0, event=0x7fffb18d4c90) at ../../kdeui/kernel/kapplication.cpp:311
#40 0x00007f37cbf8d4dd in QCoreApplication::notifyInternal (this=0x7fffb18d5410, receiver=receiver@entry=0x1eb42c0, event=event@entry=0x7fffb18d4c90) at kernel/qcoreapplication.cpp:953
#41 0x00007f37cb327d93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#42 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x1eb42c0, event=event@entry=0x7fffb18d4c90, alienWidget=alienWidget@entry=0x0, nativeWidget=nativeWidget@entry=0x1eb42c0, buttonDown=buttonDown@entry=0x7f37cbe07318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#43 0x00007f37cb39c9cb in QETWidget::translateMouseEvent (this=this@entry=0x1eb42c0, event=event@entry=0x7fffb18d5020) at kernel/qapplication_x11.cpp:4634
#44 0x00007f37cb39c269 in QApplication::x11ProcessEvent (this=0x7fffb18d5410, event=event@entry=0x7fffb18d5020) at kernel/qapplication_x11.cpp:3627
#45 0x00007f37cb3c4470 in QEventDispatcherX11::processEvents (this=0x1bd3af0, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#46 0x00007f37cbf8c0af in QEventLoop::processEvents (this=this@entry=0x7fffb18d5280, flags=...) at kernel/qeventloop.cpp:149
#47 0x00007f37cbf8c3a5 in QEventLoop::exec (this=this@entry=0x7fffb18d5280, flags=...) at kernel/qeventloop.cpp:204
#48 0x00007f37cbf91b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#49 0x00007f37cb32037c in QApplication::exec () at kernel/qapplication.cpp:3828
#50 0x00007f37d1f9b906 in kdemain (argc=3, argv=0x7fffb18d5558) at ../../kwin/main.cpp:597
#51 0x00007f37d1b79ec5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=3, argv=0x7fffb18d5558, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb18d5548) at libc-start.c:287
#52 0x00000000004006fe in _start ()

Reported using DrKonqi