Application: kwin_x11 (5.12.4)

Qt Version: 5.9.1
Frameworks Version: 5.44.0
Operating System: Linux 4.13.0-38-generic x86_64
Distribution: Ubuntu 17.10

-- Information about the crash:
I was just opening a tab in Google Chrome. I did have multiple tabs open as well as Kate. Nothing else open.

The crash can be reproduced every time.

-- 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 0x7f76548f4980 (LWP 28946))]

Thread 7 (Thread 0x7f762ed6a700 (LWP 8840)):
#0  0x00007f76542a61af in __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:67
#1  0x00007f765428ba28 in __GI_ppoll (fds=0x7f7624071978, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#2  0x00007f7651679151 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f765167a86e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f7651622e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f76514423ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f764bd7cf45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f765144729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f764d2927fc in start_thread (arg=0x7f762ed6a700) at pthread_create.c:465
#9  0x00007f7654297b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f76235fa700 (LWP 13176)):
#0  0x00007f765428ba00 in __GI_ppoll (fds=0x7f76100058d8, nfds=1, timeout=0x0, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f7651679151 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f765167a86e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f7651622e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f76514423ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f764bd7cf45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f765144729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f764d2927fc in start_thread (arg=0x7f76235fa700) at pthread_create.c:465
#8  0x00007f7654297b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f762260f700 (LWP 29053)):
#0  0x00007f764d299072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f7650866fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f764d299072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f7650866f68, cond=0x7f7650866f90) at pthread_cond_wait.c:502
#2  0x00007f764d299072 in __pthread_cond_wait (cond=0x7f7650866f90, mutex=0x7f7650866f68) at pthread_cond_wait.c:655
#3  0x00007f7650572bd4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f7650572c19 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f764d2927fc in start_thread (arg=0x7f762260f700) at pthread_create.c:465
#6  0x00007f7654297b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f762dcc2700 (LWP 29037)):
#0  0x00007f76542a61af in __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:67
#1  0x00007f765428ba28 in __GI_ppoll (fds=0x7f761c000d38, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#2  0x00007f7651679151 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f765167a86e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f7651622e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f76514423ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f764bd7cf45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f765144729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f764d2927fc in start_thread (arg=0x7f762dcc2700) at pthread_create.c:465
#9  0x00007f7654297b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f7634a32700 (LWP 28972)):
#0  0x00007f765428ba4b in __GI_ppoll (fds=0x7f762800b088, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f7651679151 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f765167a86e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f7651622e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f76514423ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f764ac40e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007f765144729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f764d2927fc in start_thread (arg=0x7f7634a32700) at pthread_create.c:465
#8  0x00007f7654297b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f76370b2700 (LWP 28954)):
#0  0x00007f765428b951 in __GI___poll (fds=fds@entry=0x7f76370b1b38, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7653196747 in poll (__timeout=-1, __nfds=1, __fds=0x7f76370b1b38) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007f7653196747 in _xcb_conn_wait (c=c@entry=0x55a1403d38e0, cond=cond@entry=0x55a1403d3920, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:479
#3  0x00007f765319853a in xcb_wait_for_event (c=0x55a1403d38e0) at ../../src/xcb_in.c:693
#4  0x00007f7637b6cf09 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007f765144729d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f764d2927fc in start_thread (arg=0x7f76370b2700) at pthread_create.c:465
#7  0x00007f7654297b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f76548f4980 (LWP 28946)):
[KCrash Handler]
#6  0x00007f7642d25bc0 in  () at /usr/lib/nvidia-390/libnvidia-glcore.so.390.48
#7  0x00007f7642df2dc3 in  () at /usr/lib/nvidia-390/libnvidia-glcore.so.390.48
#8  0x00007f7642df76e4 in  () at /usr/lib/nvidia-390/libnvidia-glcore.so.390.48
#9  0x00007f7642e00c54 in  () at /usr/lib/nvidia-390/libnvidia-glcore.so.390.48
#10 0x00007f76429bb7d5 in  () at /usr/lib/nvidia-390/libnvidia-glcore.so.390.48
#11 0x00007f764c43031f in QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f764c431555 in QSGBatchRenderer::Renderer::renderBatches() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f764c436cac in QSGBatchRenderer::Renderer::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f764c42766d in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f764c427b57 in QSGRenderer::renderScene(unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f764c461f50 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007f764c4be9b8 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f764c5778e8 in QQuickRenderControl::render() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f764c577bd0 in QQuickRenderControl::grab() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f762dce0292 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#21 0x00007f76516539ff in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f76516603b7 in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f7651660718 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f765165440b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f76523a746c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f76523aed34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f7651624de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f765167c91e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f765167aad2 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f7637bcf9ad in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#31 0x00007f7651622e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f765162bda4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f765456bdbb in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#34 0x00007f76541a41c1 in __libc_start_main (main=0x55a13e17b730, argc=3, argv=0x7ffc18202148, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc18202138) at ../csu/libc-start.c:308
#35 0x000055a13e17b76a in _start ()

Reported using DrKonqi