Application: kwin_x11 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-15-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
No other programs running. 
Chromium is the default installed from apt-get
Running on Kubuntu 15.04

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f88d0f5a800 (LWP 1320))]

Thread 5 (Thread 0x7f88b063d700 (LWP 1538)):
#0  0x00007f88d0a1c49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f88c7b792f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f88c7b3596c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f88c7b35e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f88c7b36242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f88b8be4af6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f88c7b5c955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f88c80546aa in start_thread (arg=0x7f88b063d700) at pthread_create.c:333
#8  0x00007f88d0a2beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f88afe3c700 (LWP 1539)):
#0  0x00007f88d0a208dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f88c7b35ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f88c7b35fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f88c7b36009 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f88c7b5c955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f88c80546aa in start_thread (arg=0x7f88afe3c700) at pthread_create.c:333
#6  0x00007f88d0a2beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f88ad3ec700 (LWP 1551)):
#0  0x00007fff24fbcc58 in clock_gettime ()
#1  0x00007f88d0a3a38d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f88cf08fcb6 in qt_clock_gettime (ts=0x7f88ad3ebc50, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:161
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:170
#5  0x00007f88cf26e639 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f8890001118) at kernel/qtimerinfo_unix.cpp:84
#6  0x00007f88cf26eba5 in QTimerInfoList::timerWait (this=this@entry=0x7f8890001118, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x00007f88cf26e222 in QEventDispatcherUNIX::processEvents (this=0x7f88900008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:594
#8  0x00007f88cf2153e2 in QEventLoop::exec (this=this@entry=0x7f88ad3ebda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#9  0x00007f88cefd4b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#10 0x00007f88c8e87f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f88cefd9b0e in QThreadPrivate::start (arg=0x1fc3500) at thread/qthread_unix.cpp:337
#12 0x00007f88c80546aa in start_thread (arg=0x7f88ad3ec700) at pthread_create.c:333
#13 0x00007f88d0a2beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f888f4ce700 (LWP 1607)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f88cddde644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f88cddde689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f88c80546aa in start_thread (arg=0x7f888f4ce700) at pthread_create.c:333
#4  0x00007f88d0a2beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f88d0f5a800 (LWP 1320)):
[KCrash Handler]
#6  0x00007f88d095a267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#7  0x00007f88d095beca in __GI_abort () at abort.c:89
#8  0x00007f88cefc6edf in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1415
#9  QMessageLogger::fatal (this=this@entry=0x7fff24fb4870, msg=msg@entry=0x7f88ce7fb8a8 "Splitting quads is allowed only in pre-paint calls!") at global/qlogging.cpp:636
#10 0x00007f88ce7e8ea1 in KWin::WindowQuad::makeSubQuad (this=this@entry=0x269c270, x1=x1@entry=1216.3806595249785, y1=y1@entry=36.600239143760632, x2=x2@entry=1280, y2=y2@entry=50.825671885269742) at ../../libkwineffects/kwineffects.cpp:907
#11 0x00007f88d05ec289 in KWin::SceneOpenGL::Window::beginRenderWindow (this=<optimized out>, mask=<optimized out>, region=..., data=...) at ../scene_opengl.cpp:1249
#12 0x00007f88d05ec907 in KWin::SceneOpenGL2Window::performPaint (this=this@entry=0x26c7bb0, mask=mask@entry=118, region=..., data=...) at ../scene_opengl.cpp:1421
#13 0x00007f88d05f2642 in KWin::SceneOpenGL2::performPaintWindow (this=this@entry=0x1f9d030, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../scene_opengl.cpp:1082
#14 0x00007f88d05f2818 in KWin::SceneOpenGL2::finalDrawWindow (this=0x1f9d030, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../scene_opengl.cpp:1068
#15 0x00007f88d060b139 in KWin::EffectsHandlerImpl::drawWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:473
#16 0x00007f88ce393385 in KWin::ContrastEffect::drawWindow (this=this@entry=0x1eb8460, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../effects/backgroundcontrast/contrast.cpp:345
#17 0x00007f88d060b0d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:470
#18 0x00007f88ce3092db in KWin::BlurEffect::drawWindow (this=this@entry=0x24a5fb0, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../effects/blur/blur.cpp:415
#19 0x00007f88d060b0d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:470
#20 0x00007f88ce7e57c1 in KWin::Effect::drawWindow (this=this@entry=0x2572420, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:580
#21 0x00007f88d060b0d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:470
#22 0x00007f88ce7e57c1 in KWin::Effect::drawWindow (this=this@entry=0x255c650, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:580
#23 0x00007f88d060b0d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:470
#24 0x00007f88ce7e57c1 in KWin::Effect::drawWindow (this=this@entry=0x259c0f0, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:580
#25 0x00007f88d060b0d1 in KWin::EffectsHandlerImpl::drawWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:470
#26 0x00007f88d05d4841 in KWin::Scene::finalPaintWindow (this=<optimized out>, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../scene.cpp:605
#27 0x00007f88d060af7a in KWin::EffectsHandlerImpl::paintWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:436
#28 0x00007f88ce7e5651 in KWin::Effect::paintWindow (this=this@entry=0x1eb8460, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:550
#29 0x00007f88d060af21 in KWin::EffectsHandlerImpl::paintWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:433
#30 0x00007f88ce7e5651 in KWin::Effect::paintWindow (this=this@entry=0x24a5fb0, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:550
#31 0x00007f88d060af21 in KWin::EffectsHandlerImpl::paintWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:433
#32 0x00007f88ce7f3937 in KWin::AnimationEffect::paintWindow (this=this@entry=0x2572420, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../libkwineffects/kwinanimationeffect.cpp:585
#33 0x00007f88d060af21 in KWin::EffectsHandlerImpl::paintWindow (this=0x2492f10, w=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:433
#34 0x00007f88ce31e7a0 in KWin::CubeSlideEffect::paintWindow (this=this@entry=0x255c650, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../effects/cube/cubeslide.cpp:347
#35 0x00007f88d060af21 in KWin::EffectsHandlerImpl::paintWindow (this=0x2492f10, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:433
#36 0x00007f88ce368fbd in KWin::WobblyWindowsEffect::paintWindow (this=this@entry=0x259c0f0, w=w@entry=0x2643390, mask=mask@entry=118, region=..., data=...) at ../../effects/wobblywindows/wobblywindows.cpp:331
#37 0x00007f88d060af21 in KWin::EffectsHandlerImpl::paintWindow (this=0x2492f10, w=0x2643390, mask=mask@entry=118, region=..., data=...) at ../effects.cpp:433
#38 0x00007f88d05d8ee8 in KWin::Scene::paintWindow (this=this@entry=0x1f9d030, w=0x26c7bb0, mask=118, region=..., quads=...) at ../scene.cpp:477
#39 0x00007f88d05d5ed6 in KWin::Scene::paintGenericScreen (this=this@entry=0x1f9d030, orig_mask=orig_mask@entry=112) at ../scene.cpp:241
#40 0x00007f88d05e7bd4 in KWin::SceneOpenGL2::paintGenericScreen (this=this@entry=0x1f9d030, mask=mask@entry=112, data=...) at ../scene_opengl.cpp:1020
#41 0x00007f88d05d424d in KWin::Scene::finalPaintScreen (this=0x1f9d030, mask=mask@entry=112, region=..., data=...) at ../scene.cpp:197
#42 0x00007f88d060acff in KWin::EffectsHandlerImpl::paintScreen (this=0x2492f10, mask=mask@entry=112, region=..., data=...) at ../effects.cpp:393
#43 0x00007f88ce7e557f in KWin::Effect::paintScreen (this=this@entry=0x1eb8460, mask=mask@entry=112, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#44 0x00007f88d060acad in KWin::EffectsHandlerImpl::paintScreen (this=0x2492f10, mask=mask@entry=112, region=..., data=...) at ../effects.cpp:390
#45 0x00007f88ce7e557f in KWin::Effect::paintScreen (this=this@entry=0x24a5fb0, mask=mask@entry=112, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#46 0x00007f88d060acad in KWin::EffectsHandlerImpl::paintScreen (this=0x2492f10, mask=mask@entry=112, region=..., data=...) at ../effects.cpp:390
#47 0x00007f88ce7e557f in KWin::Effect::paintScreen (this=this@entry=0x2572420, mask=mask@entry=112, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#48 0x00007f88d060acad in KWin::EffectsHandlerImpl::paintScreen (this=0x2492f10, mask=mask@entry=112, region=..., data=...) at ../effects.cpp:390
#49 0x00007f88ce31e3f7 in KWin::CubeSlideEffect::paintSlideCube (this=this@entry=0x255c650, mask=mask@entry=112, region=..., data=...) at ../../effects/cube/cubeslide.cpp:176
#50 0x00007f88ce321d6e in KWin::CubeSlideEffect::paintScreen (this=this@entry=0x255c650, mask=mask@entry=112, region=..., data=...) at ../../effects/cube/cubeslide.cpp:87
#51 0x00007f88d060acad in KWin::EffectsHandlerImpl::paintScreen (this=0x2492f10, mask=mask@entry=112, region=..., data=...) at ../effects.cpp:390
#52 0x00007f88ce7e557f in KWin::Effect::paintScreen (this=this@entry=0x259c0f0, mask=mask@entry=112, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#53 0x00007f88d060acad in KWin::EffectsHandlerImpl::paintScreen (this=0x2492f10, mask=112, region=..., data=...) at ../effects.cpp:390
#54 0x00007f88d05d3e6a in KWin::Scene::paintScreen (this=this@entry=0x1f9d030, mask=mask@entry=0x7fff24fb625c, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7fff24fb6270, validRegion=validRegion@entry=0x7fff24fb6280) at ../scene.cpp:149
#55 0x00007f88d05edda7 in KWin::SceneOpenGL::paint (this=0x1f9d030, damage=..., toplevels=...) at ../scene_opengl.cpp:651
#56 0x00007f88d05cd973 in KWin::Compositor::performCompositing (this=0x1ed6f00) at ../composite.cpp:658
#57 0x00007f88cf2496f3 in QObject::event (this=0x1ed6f00, e=<optimized out>) at kernel/qobject.cpp:1267
#58 0x00007f88cfb21b2c in QApplicationPrivate::notify_helper (this=0x1c8a870, receiver=0x1ed6f00, e=0x7fff24fb6690) at kernel/qapplication.cpp:3720
#59 0x00007f88cfb27000 in QApplication::notify (this=0x7fff24fb68d0, receiver=0x1ed6f00, e=0x7fff24fb6690) at kernel/qapplication.cpp:3503
#60 0x00007f88cf217c2b in QCoreApplication::notifyInternal (this=0x7fff24fb68d0, receiver=0x1ed6f00, event=event@entry=0x7fff24fb6690) at kernel/qcoreapplication.cpp:935
#61 0x00007f88cf26fae5 in sendEvent (event=0x7fff24fb6690, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#62 QTimerInfoList::activateTimers (this=0x1d40e98) at kernel/qtimerinfo_unix.cpp:635
#63 0x00007f88cf26d6a0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x1d3fa40) at kernel/qeventdispatcher_unix.cpp:549
#64 0x00007f88cf26e243 in QEventDispatcherUNIX::processEvents (this=0x1d3fa40, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#65 0x00007f88bba2c96d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#66 0x00007f88cf2153e2 in QEventLoop::exec (this=this@entry=0x7fff24fb67f0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#67 0x00007f88cf21d02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#68 0x00007f88cf55c31c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#69 0x00007f88cfb1d7a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#70 0x00007f88d0cf38c3 in kdemain (argc=1, argv=0x7fff24fb6a28) at ../main_x11.cpp:294
#71 0x00007f88d0945a40 in __libc_start_main (main=0x400790 <main(int, char**)>, argc=3, argv=0x7fff24fb6a28, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff24fb6a18) at libc-start.c:289
#72 0x00000000004007c9 in _start ()

Reported using DrKonqi