Application: kwin_x11 (5.10.5)

Qt Version: 5.9.2
Frameworks Version: 5.38.0
Operating System: Linux 4.13.5-gentoo x86_64
Distribution: "Gentoo Base System release 2.4.1"

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

I was Alt+Tab-ing through the open windows, when KWin crashed.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1771820840 (LWP 5560))]

Thread 14 (Thread 0x7f17519da700 (LWP 12411)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x2a72ab8, cond=0x2a72ae0) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x28b1910) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7f172fe6c700 (LWP 12392)):
#0  0x00007f17713165c3 in ppoll () from /lib64/libc.so.6
#1  0x00007f176f244419 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f1724000c38) at kernel/qcore_unix.cpp:81
#3  qt_safe_poll (fds=0x7f1724000c38, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:102
#4  0x00007f176f245663 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:500
#5  0x00007f176f1f866a in QEventLoop::exec (this=this@entry=0x7f172fe6bd50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f176f05c3bb in QThread::exec (this=this@entry=0x27e4150) at thread/qthread.cpp:515
#7  0x00007f1769eb3675 in QQmlThreadPrivate::run (this=0x27e4150) at qml/ftw/qqmlthread.cpp:147
#8  0x00007f176f0605e0 in QThreadPrivate::start (arg=0x27e4150) at thread/qthread_unix.cpp:368
#9  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7f172f635700 (LWP 5779)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f176e366634 in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007f176e366679 in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7f173066d700 (LWP 5749)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x25bb758, cond=0x25bb780) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x2464d20) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f1730e6e700 (LWP 5748)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x2460710, cond=0x2460738) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x249f350) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f173166f700 (LWP 5747)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x2460710, cond=0x2460738) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x247e640) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f1731e70700 (LWP 5746)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x2460628, cond=0x2460650) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x24a47e0) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f1732671700 (LWP 5745)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x2460628, cond=0x2460650) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x24a45d0) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f1732e72700 (LWP 5744)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x2460628, cond=0x2460650) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x2473cb0) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f1733879700 (LWP 5743)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x23bf820, cond=0x23bf848) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x24bb200) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f173407a700 (LWP 5742)):
#0  0x00007f176afe9466 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00007f174279b7f3 in cnd_wait (mtx=0x245d8c8, cond=0x245d8f0) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:159
#2  util_queue_thread_func (input=input@entry=0x24bb1c0) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/util/u_queue.c:158
#3  0x00007f174279b717 in impl_thrd_routine (p=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/include/c11/threads_posix.h:87
#4  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f1750d4a700 (LWP 5712)):
#0  0x00007f17713165c3 in ppoll () from /lib64/libc.so.6
#1  0x00007f176f244419 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f1748000ac8) at kernel/qcore_unix.cpp:81
#3  qt_safe_poll (fds=0x7f1748000ac8, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:102
#4  0x00007f176f245663 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:500
#5  0x00007f176f1f866a in QEventLoop::exec (this=this@entry=0x7f1750d49d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f176f05c3bb in QThread::exec (this=this@entry=0x2416db0) at thread/qthread.cpp:515
#7  0x00007f1769eb3675 in QQmlThreadPrivate::run (this=0x2416db0) at qml/ftw/qqmlthread.cpp:147
#8  0x00007f176f0605e0 in QThreadPrivate::start (arg=0x2416db0) at thread/qthread_unix.cpp:368
#9  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f1753882700 (LWP 5586)):
#0  0x00007f17713165c3 in ppoll () from /lib64/libc.so.6
#1  0x00007f176f244419 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f174c00aad8) at kernel/qcore_unix.cpp:81
#3  qt_safe_poll (fds=0x7f174c00aad8, nfds=nfds@entry=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:102
#4  0x00007f176f245663 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:500
#5  0x00007f176f1f866a in QEventLoop::exec (this=this@entry=0x7f1753881d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f176f05c3bb in QThread::exec (this=this@entry=0x7f177197cda0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:515
#7  0x00007f17719086b5 in QDBusConnectionManager::run (this=0x7f177197cda0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007f176f0605e0 in QThreadPrivate::start (arg=0x7f177197cda0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#9  0x00007f176afe2617 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f177132160f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f1771820840 (LWP 5560)):
[KCrash Handler]
#6  si_draw_vbo (ctx=0x290b990, info=0x2a73878) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/gallium/drivers/radeonsi/si_state_draw.c:1305
#7  0x00007f17428b8863 in tc_call_draw_vbo (pipe=<optimized out>, payload=0x2a73878) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/gallium/auxiliary/util/u_threaded_context.c:1814
#8  0x00007f17428b69b0 in tc_batch_execute (thread_index=0, job=0x2a73800) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/gallium/auxiliary/util/u_threaded_context.c:94
#9  _tc_sync (tc=tc@entry=0x2a726e0, func=<optimized out>, info=<optimized out>) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/gallium/auxiliary/util/u_threaded_context.c:185
#10 0x00007f17428b8eaf in tc_texture_subdata (_pipe=0x2a726e0, resource=0x2dbe7b0, level=0, usage=0, box=0x7ffdd4ab6000, data=0x7f1691ad7010, stride=1504, layer_stride=239136) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/gallium/auxiliary/util/u_threaded_context.c:1631
#11 0x00007f17426a608f in st_TexSubImage (ctx=ctx@entry=0x7f1691f0d010, dims=dims@entry=2, texImage=texImage@entry=0x2db9ff0, xoffset=xoffset@entry=0, yoffset=<optimized out>, yoffset@entry=0, zoffset=zoffset@entry=0, width=376, height=<optimized out>, depth=1, format=32993, type=5121, pixels=0x7f1691ad7010, unpack=0x7f1691f28f48) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/mesa/state_tracker/st_cb_texture.c:1418
#12 0x00007f17426a7bb8 in st_TexImage (ctx=0x7f1691f0d010, dims=2, texImage=0x2db9ff0, format=32993, type=5121, pixels=0x7f1691ad7010, unpack=0x7f1691f28f48) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/mesa/state_tracker/st_cb_texture.c:1635
#13 0x00007f174262a513 in teximage (no_error=false, pixels=0x7f1691ad7010, imageSize=0, type=5121, format=32993, border=0, depth=<optimized out>, height=<optimized out>, width=<optimized out>, internalFormat=<optimized out>, level=0, target=3553, dims=2, compressed=0 '\000', ctx=0x7f1691f0d010) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/mesa/main/teximage.c:3055
#14 teximage_err (ctx=0x7f1691f0d010, compressed=compressed@entry=0 '\000', dims=dims@entry=2, target=3553, level=0, internalFormat=<optimized out>, width=376, height=159, depth=1, border=<optimized out>, format=32993, type=5121, imageSize=0, pixels=0x7f1691ad7010) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/mesa/main/teximage.c:3081
#15 0x00007f174262c600 in _mesa_TexImage2D (target=<optimized out>, level=<optimized out>, internalFormat=<optimized out>, width=<optimized out>, height=<optimized out>, border=<optimized out>, format=32993, type=5121, pixels=0x7f1691ad7010) at /var/tmp/portage/media-libs/mesa-17.2.2/work/mesa-17.2.2/src/mesa/main/teximage.c:3119
#16 0x00007f176a37e077 in QOpenGLFunctions::glTexImage2D (pixels=<optimized out>, type=5121, format=32993, border=0, height=<optimized out>, width=<optimized out>, internalformat=6408, level=0, target=3553, this=0x2a962c0) at /usr/include/qt5/QtGui/qopenglfunctions.h:1019
#17 QSGPlainTexture::bind (this=this@entry=0x2d972e0) at scenegraph/util/qsgtexture.cpp:837
#18 0x00007f176a3a410f in QSGPainterTexture::bind (this=0x2d972e0) at scenegraph/util/qsgdefaultpainternode.cpp:71
#19 0x00007f176a380416 in QSGOpaqueTextureMaterialShader::updateState (this=0x2ab98a0, state=..., newEffect=<optimized out>, oldEffect=0x2da1db0) at scenegraph/util/qsgtexturematerial.cpp:116
#20 0x00007f176a36ef46 in QSGBatchRenderer::Renderer::renderMergedBatch (this=0x2da7390, batch=0x2ddfab0) at scenegraph/coreapi/qsgbatchrenderer.cpp:2326
#21 0x00007f176a37041d in QSGBatchRenderer::Renderer::renderBatches (this=this@entry=0x2da7390) at scenegraph/coreapi/qsgbatchrenderer.cpp:2569
#22 0x00007f176a375958 in QSGBatchRenderer::Renderer::render (this=<optimized out>) at scenegraph/coreapi/qsgbatchrenderer.cpp:2763
#23 0x00007f176a366c7a in QSGRenderer::renderScene (this=0x2da7390, bindable=...) at scenegraph/coreapi/qsgrenderer.cpp:243
#24 0x00007f176a36714b in QSGRenderer::renderScene (this=<optimized out>, fboId=<optimized out>) at scenegraph/coreapi/qsgrenderer.cpp:196
#25 0x00007f176a3a06a6 in QSGDefaultRenderContext::renderNextFrame (this=0x294bab0, renderer=0x2da7390, fboId=<optimized out>) at scenegraph/qsgdefaultrendercontext.cpp:181
#26 0x00007f176a3fb59a in QQuickWindowPrivate::renderSceneGraph (this=this@entry=0x28750f0, size=...) at items/qquickwindow.cpp:470
#27 0x00007f176a392ec8 in QSGGuiThreadRenderLoop::renderWindow (this=0x284caf0, window=<optimized out>) at scenegraph/qsgrenderloop.cpp:429
#28 0x00007f176a405796 in QQuickWindow::event (this=this@entry=0x2875020, e=e@entry=0x7ffdd4ab6f70) at items/qquickwindow.cpp:1587
#29 0x00007f16925eadab in PlasmaQuick::Dialog::event (this=0x2875020, event=0x7ffdd4ab6f70) at /var/tmp/portage/kde-frameworks/plasma-5.38.0/work/plasma-framework-5.38.0/src/plasmaquick/dialog.cpp:1171
#30 0x00007f176fa44f4c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x2875020, e=0x7ffdd4ab6f70) at kernel/qapplication.cpp:3722
#31 0x00007f176fa4c620 in QApplication::notify (this=0x7ffdd4ab7650, receiver=0x2875020, e=0x7ffdd4ab6f70) at kernel/qapplication.cpp:3481
#32 0x00007f176f1f9891 in QCoreApplication::notifyInternal2 (receiver=receiver@entry=0x2875020, event=event@entry=0x7ffdd4ab6f70) at kernel/qcoreapplication.cpp:1018
#33 0x00007f176f551986 in QCoreApplication::sendEvent (event=0x7ffdd4ab6f70, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#34 QWindowPrivate::deliverUpdateRequest (this=this@entry=0x28750f0) at kernel/qwindow.cpp:2302
#35 0x00007f176f551e99 in QWindow::event (this=this@entry=0x2875020, ev=ev@entry=0x7ffdd4ab73e0) at kernel/qwindow.cpp:2273
#36 0x00007f176a405735 in QQuickWindow::event (this=this@entry=0x2875020, e=e@entry=0x7ffdd4ab73e0) at items/qquickwindow.cpp:1606
#37 0x00007f16925eadab in PlasmaQuick::Dialog::event (this=0x2875020, event=0x7ffdd4ab73e0) at /var/tmp/portage/kde-frameworks/plasma-5.38.0/work/plasma-framework-5.38.0/src/plasmaquick/dialog.cpp:1171
#38 0x00007f176fa44f4c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x2875020, e=0x7ffdd4ab73e0) at kernel/qapplication.cpp:3722
#39 0x00007f176fa4c620 in QApplication::notify (this=0x7ffdd4ab7650, receiver=0x2875020, e=0x7ffdd4ab73e0) at kernel/qapplication.cpp:3481
#40 0x00007f176f1f9891 in QCoreApplication::notifyInternal2 (receiver=0x2875020, event=event@entry=0x7ffdd4ab73e0) at kernel/qcoreapplication.cpp:1018
#41 0x00007f176f24744b in QCoreApplication::sendEvent (event=0x7ffdd4ab73e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#42 QTimerInfoList::activateTimers (this=this@entry=0x21c8660) at kernel/qtimerinfo_unix.cpp:643
#43 0x00007f176f244844 in QEventDispatcherUNIXPrivate::activateTimers (this=this@entry=0x21c85c0) at kernel/qeventdispatcher_unix.cpp:249
#44 0x00007f176f245808 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:514
#45 0x00007f175a1c3135 in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at qunixeventdispatcher.cpp:68
#46 0x00007f176f1f866a in QEventLoop::exec (this=this@entry=0x7ffdd4ab7570, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#47 0x00007f176f2008fc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
#48 0x00007f176f53d9ec in QGuiApplication::exec () at kernel/qguiapplication.cpp:1679
#49 0x00007f176fa44ea5 in QApplication::exec () at kernel/qapplication.cpp:2910
#50 0x00007f17715ec00d in kdemain (argc=<optimized out>, argv=0x7ffdd4ab77e8) at /var/tmp/portage/kde-plasma/kwin-5.10.5/work/kwin-5.10.5/main_x11.cpp:466
#51 0x00007f177124b5b1 in __libc_start_main () from /lib64/libc.so.6
#52 0x00000000004006ea in _start ()

Reported using DrKonqi