Application: kwin_x11 (5.3.0)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-17-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:

When I attempted to apply a new theme, Evolvere Light Pure, KWin died under me with no warning.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5679710800 (LWP 1438))]

Thread 6 (Thread 0x7f565b4ab700 (LWP 1462)):
#0  0x00007f56791da743 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f56777cc101 in qt_safe_select (nfds=15, fdread=fdread@entry=0x7f564c000a78, fdwrite=fdwrite@entry=0x7f564c000d08, fdexcept=fdexcept@entry=0x7f564c000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f56777cdcd2 in select (timeout=0x0, exceptfds=0x7f564c000f98, writefds=0x7f564c000d08, readfds=0x7f564c000a78, nfds=<optimized out>, this=0x7f564c0008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f564c0008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f56777ce275 in QEventDispatcherUNIX::processEvents (this=0x7f564c0008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f56777753e2 in QEventLoop::exec (this=this@entry=0x7f565b4aada0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5677534b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f5671397f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f5677539b0e in QThreadPrivate::start (arg=0xd21760) at thread/qthread_unix.cpp:337
#9  0x00007f5678a596aa in start_thread (arg=0x7f565b4ab700) at pthread_create.c:333
#10 0x00007f56791e3eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f564bfff700 (LWP 1478)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f567633d644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f567633d689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f5678a596aa in start_thread (arg=0x7f564bfff700) at pthread_create.c:333
#4  0x00007f56791e3eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f55c38be700 (LWP 22780)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f567753aba8 in wait_relative (time=30000, this=0xc03a10) at thread/qwaitcondition_unix.cpp:118
#2  wait (time=30000, this=0xc03a10) at thread/qwaitcondition_unix.cpp:126
#3  QWaitCondition::wait (this=this@entry=0xbfea60, mutex=mutex@entry=0xc037b0, time=30000) at thread/qwaitcondition_unix.cpp:200
#4  0x00007f5677536c54 in QThreadPoolThread::run (this=0xbfea50) at thread/qthreadpool.cpp:127
#5  0x00007f5677539b0e in QThreadPrivate::start (arg=0xbfea50) at thread/qthread_unix.cpp:337
#6  0x00007f5678a596aa in start_thread (arg=0x7f55c38be700) at pthread_create.c:333
#7  0x00007f56791e3eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f565bfff700 (LWP 22781)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f567753aba8 in wait_relative (time=30000, this=0x18841c0) at thread/qwaitcondition_unix.cpp:118
#2  wait (time=30000, this=0x18841c0) at thread/qwaitcondition_unix.cpp:126
#3  QWaitCondition::wait (this=this@entry=0x152c510, mutex=mutex@entry=0xc037b0, time=30000) at thread/qwaitcondition_unix.cpp:200
#4  0x00007f5677536c54 in QThreadPoolThread::run (this=0x152c500) at thread/qthreadpool.cpp:127
#5  0x00007f5677539b0e in QThreadPrivate::start (arg=0x152c500) at thread/qthread_unix.cpp:337
#6  0x00007f5678a596aa in start_thread (arg=0x7f565bfff700) at pthread_create.c:333
#7  0x00007f56791e3eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f55c2bf5700 (LWP 22782)):
#0  0x00007f56777cde2a in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f55b40008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:186
#1  0x00007f56777ce275 in QEventDispatcherUNIX::processEvents (this=0x7f55b40008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#2  0x00007f56777753e2 in QEventLoop::exec (this=this@entry=0x7f55c2bf4da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#3  0x00007f5677534b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#4  0x00007f5671397f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#5  0x00007f5677539b0e in QThreadPrivate::start (arg=0x2510260) at thread/qthread_unix.cpp:337
#6  0x00007f5678a596aa in start_thread (arg=0x7f55c2bf5700) at pthread_create.c:333
#7  0x00007f56791e3eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5679710800 (LWP 1438)):
[KCrash Handler]
#6  KWin::GLShader::resolveLocations (this=0x0) at ../../libkwineffects/kwinglutils.cpp:419
#7  0x00007f56717e4eb6 in KWin::GLShader::setUniform (this=0x0, uniform=uniform@entry=KWin::GLShader::Offset, value=...) at ../../libkwineffects/kwinglutils.cpp:456
#8  0x00007f5678d87f9d in KWin::SceneOpenGL2::doPaintBackground (this=<optimized out>, vertices=...) at ../scene_opengl.cpp:1052
#9  0x00007f5678d8d705 in KWin::SceneOpenGL::paintBackground (this=this@entry=0xc50b00, region=...) at ../scene_opengl.cpp:742
#10 0x00007f5678d742ac in KWin::Scene::paintSimpleScreen (this=this@entry=0xc50b00, orig_mask=orig_mask@entry=0, region=...) at ../scene.cpp:371
#11 0x00007f5678d87743 in KWin::SceneOpenGL2::paintSimpleScreen (this=this@entry=0xc50b00, mask=mask@entry=0, region=...) at ../scene_opengl.cpp:1015
#12 0x00007f5678d70e15 in KWin::Scene::finalPaintScreen (this=0xc50b00, mask=mask@entry=0, region=..., data=...) at ../scene.cpp:201
#13 0x00007f5678dabf1f in KWin::EffectsHandlerImpl::paintScreen (this=0x187f400, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:397
#14 0x00007f5676d4566f in KWin::Effect::paintScreen (this=this@entry=0x15376e0, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#15 0x00007f5678dabecd in KWin::EffectsHandlerImpl::paintScreen (this=0x187f400, mask=mask@entry=0, region=..., data=...) at ../effects.cpp:394
#16 0x00007f5676d4566f in KWin::Effect::paintScreen (this=this@entry=0xd25860, mask=mask@entry=0, region=..., data=...) at ../../libkwineffects/kwineffects.cpp:535
#17 0x00007f5678dabecd in KWin::EffectsHandlerImpl::paintScreen (this=0x187f400, mask=0, region=..., data=...) at ../effects.cpp:394
#18 0x00007f5678d70a7a in KWin::Scene::paintScreen (this=this@entry=0xc50b00, mask=mask@entry=0x7fff7c8466dc, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7fff7c8466f0, validRegion=validRegion@entry=0x7fff7c846700) at ../scene.cpp:151
#19 0x00007f5678d8e037 in KWin::SceneOpenGL::paint (this=0xc50b00, damage=..., toplevels=...) at ../scene_opengl.cpp:661
#20 0x00007f5678d68f33 in KWin::Compositor::performCompositing (this=0xc09e40) at ../composite.cpp:700
#21 0x00007f56777a96f3 in QObject::event (this=0xc09e40, e=<optimized out>) at kernel/qobject.cpp:1267
#22 0x00007f5678081b2c in QApplicationPrivate::notify_helper (this=0xb0dc90, receiver=0xc09e40, e=0x7fff7c846b10) at kernel/qapplication.cpp:3720
#23 0x00007f5678087000 in QApplication::notify (this=0x7fff7c846d50, receiver=0xc09e40, e=0x7fff7c846b10) at kernel/qapplication.cpp:3503
#24 0x00007f5677777c2b in QCoreApplication::notifyInternal (this=0x7fff7c846d50, receiver=0xc09e40, event=event@entry=0x7fff7c846b10) at kernel/qcoreapplication.cpp:935
#25 0x00007f56777cfae5 in sendEvent (event=0x7fff7c846b10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#26 QTimerInfoList::activateTimers (this=0xb42b38) at kernel/qtimerinfo_unix.cpp:635
#27 0x00007f56777cd6a0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0xb3d1d0) at kernel/qeventdispatcher_unix.cpp:549
#28 0x00007f56777ce243 in QEventDispatcherUNIX::processEvents (this=0xb3d1d0, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#29 0x00007f56636ea96d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#30 0x00007f56777753e2 in QEventLoop::exec (this=this@entry=0x7fff7c846c70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#31 0x00007f567777d02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#32 0x00007f5677abc31c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#33 0x00007f567807d7a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#34 0x00007f56794ac310 in kdemain (argc=1, argv=0x7fff7c846eb8) at ../main_x11.cpp:300
#35 0x00007f56790fda40 in __libc_start_main (main=0x400790 <main(int, char**)>, argc=3, argv=0x7fff7c846eb8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff7c846ea8) at libc-start.c:289
#36 0x00000000004007c9 in _start ()

Reported using DrKonqi