Application: kwin_x11 (5.6.2)

Qt Version: 5.5.1
Frameworks Version: 5.21.0
Operating System: Linux 4.2.0-35-generic x86_64
Distribution: KDE neon on 15.10

-- Information about the crash:
- What I was doing when the application crashed:
trying to configure kmail for a few gmail accounts
- Unusual behavior I noticed:
dialog of some error popped up for a brief instant and dissappeared. Couldn't use krunner as it was exited by dialog before I could choose anything

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Floating point exception
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2500570840 (LWP 1362))]

Thread 4 (Thread 0x7f24e8f43700 (LWP 1378)):
#0  0x00007f250005288d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f24fe131bd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f24fe13374f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f24e97e3a49 in QXcbEventReader::run (this=0x1d05ec0) at qxcbconnection.cpp:1230
#4  0x00007f24fe3eea6e in QThreadPrivate::start (arg=0x1d05ec0) at thread/qthread_unix.cpp:331
#5  0x00007f24ff6476aa in start_thread (arg=0x7f24e8f43700) at pthread_create.c:333
#6  0x00007f250005de9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f24e18e5700 (LWP 1409)):
#0  0x00007f24fe6237b6 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f24d40008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:184
#1  0x00007f24fe623b9e in QEventDispatcherUNIX::processEvents (this=0x7f24d40008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#2  0x00007f24fe5cd50a in QEventLoop::exec (this=this@entry=0x7f24e18e4d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#3  0x00007f24fe3e9ac4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#4  0x00007f24f8cee105 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#5  0x00007f24fe3eea6e in QThreadPrivate::start (arg=0x1f17630) at thread/qthread_unix.cpp:331
#6  0x00007f24ff6476aa in start_thread (arg=0x7f24e18e5700) at pthread_create.c:333
#7  0x00007f250005de9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f24d9910700 (LWP 1415)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f24fd573194 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f24fd5731d9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f24ff6476aa in start_thread (arg=0x7f24d9910700) at pthread_create.c:333
#4  0x00007f250005de9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f2500570840 (LWP 1362)):
[KCrash Handler]
#6  0x00007f24fd6d449d in KWin::FlipSwitchEffect::paintScreen (this=this@entry=0x26ff720, region=..., data=..., mask=<optimized out>) at ../../effects/flipswitch/flipswitch.cpp:148
#7  0x00007f24fd6d59fb in KWin::FlipSwitchEffect::paintScreen (this=this@entry=0x26ff720, mask=mask@entry=32, region=..., data=...) at ../../effects/flipswitch/flipswitch.cpp:121
#8  0x00007f24ffc1a50a in KWin::EffectsHandlerImpl::paintScreen (this=0x26a62e0, mask=32, region=..., data=...) at ../effects.cpp:420
#9  0x00007f24ffbf1479 in KWin::Scene::paintScreen (this=this@entry=0x20b8b60, mask=mask@entry=0x7ffe8ff046b0, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7ffe8ff04680, validRegion=validRegion@entry=0x7ffe8ff04690, projection=...) at ../scene.cpp:150
#10 0x00007f24ffc088a9 in KWin::SceneOpenGL::paint (this=0x20b8b60, damage=..., toplevels=...) at ../scene_opengl.cpp:751
#11 0x00007f24ffbe4789 in KWin::Compositor::performCompositing (this=0x1dda6b0) at ../composite.cpp:726
#12 0x00007f24fe5ff753 in QObject::event (this=0x1dda6b0, e=<optimized out>) at kernel/qobject.cpp:1261
#13 0x00007f24feec49dc in QApplicationPrivate::notify_helper (this=this@entry=0x1cfc400, receiver=receiver@entry=0x1dda6b0, e=e@entry=0x7ffe8ff04b10) at kernel/qapplication.cpp:3716
#14 0x00007f24feec9ea6 in QApplication::notify (this=0x7ffe8ff04d70, receiver=0x1dda6b0, e=0x7ffe8ff04b10) at kernel/qapplication.cpp:3499
#15 0x00007f24fe5cfd7b in QCoreApplication::notifyInternal (this=0x7ffe8ff04d70, receiver=0x1dda6b0, event=event@entry=0x7ffe8ff04b10) at kernel/qcoreapplication.cpp:965
#16 0x00007f24fe6252fd in QCoreApplication::sendEvent (event=0x7ffe8ff04b10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#17 QTimerInfoList::activateTimers (this=0x1d441f8) at kernel/qtimerinfo_unix.cpp:637
#18 0x00007f24fe6230a0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x1d2d9d0) at kernel/qeventdispatcher_unix.cpp:549
#19 0x00007f24fe623b16 in QEventDispatcherUNIX::processEvents (this=0x1d2d9d0, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#20 0x00007f24e984a99d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#21 0x00007f24fe5cd50a in QEventLoop::exec (this=this@entry=0x7ffe8ff04c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#22 0x00007f24fe5d55dc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#23 0x00007f24fe909cec in QGuiApplication::exec () at kernel/qguiapplication.cpp:1527
#24 0x00007f24feec0e15 in QApplication::exec () at kernel/qapplication.cpp:2976
#25 0x00007f25003269cf in kdemain (argc=1, argv=0x7ffe8ff04ef8) at ../main_x11.cpp:327
#26 0x00007f24fff77a40 in __libc_start_main (main=0x400820 <main(int, char**)>, argc=3, argv=0x7ffe8ff04ef8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe8ff04ee8) at libc-start.c:289
#27 0x0000000000400859 in _start ()

Possible duplicates by query: bug 300944, bug 300187.

Reported using DrKonqi