Application: kwin_x11 (5.11.5)

Qt Version: 5.10.0
Frameworks Version: 5.40.0
Operating System: Linux 4.14.11-1-default x86_64
Distribution: "openSUSE Tumbleweed"

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

triggered Show Desktop Grid effect from top left corner.

I have my panel on the left ahnd side, and kickoff in the top left corner, in case this is relevant.

this might be a duplicate of 374853

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb3afd89940 (LWP 8316))]

Thread 15 (Thread 0x7fb2bbfff700 (LWP 8336)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e1082f98) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e1082f48, cond=0x55a0e1082f70) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e1082f70, mutex=0x55a0e1082f48) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb2bbfff700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fb2c14ff700 (LWP 8335)):
#0  0x00007ffc2a6dea35 in clock_gettime ()
#1  0x00007fb3af725fc6 in __GI___clock_gettime (clock_id=1, tp=0x7fb2c14feaf0) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007fb3acd61f91 in qt_gettime() () at /usr/lib64/libQt5Core.so.5
#3  0x00007fb3acd60869 in QTimerInfoList::updateCurrentTime() () at /usr/lib64/libQt5Core.so.5
#4  0x00007fb3acd60de5 in QTimerInfoList::timerWait(timespec&) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fb3acd5fe34 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fb3acd094aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fb3acb308da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007fb3a7210bd5 in QQmlThreadPrivate::run() () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fb3acb358d0 in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#10 0x00007fb3a8734558 in start_thread (arg=0x7fb2c14ff700) at pthread_create.c:465
#11 0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fb365548700 (LWP 8333)):
#0  0x00007fb3af70e026 in __GI_ppoll (fds=0x7fb354000d58, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fb3acd5e549 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fb3acd5fb26 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fb3acd094aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fb3acb308da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#5  0x00007fb3a7210bd5 in QQmlThreadPrivate::run() () at /usr/lib64/libQt5Qml.so.5
#6  0x00007fb3acb358d0 in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fb3a8734558 in start_thread (arg=0x7fb365548700) at pthread_create.c:465
#8  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fb34f7fe700 (LWP 8331)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fb3abf9cfb8 <QTWTF::pageheap_memory+57592>) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fb3abf9cf68 <QTWTF::pageheap_memory+57512>, cond=0x7fb3abf9cf90 <QTWTF::pageheap_memory+57552>) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x7fb3abf9cf90 <QTWTF::pageheap_memory+57552>, mutex=0x7fb3abf9cf68 <QTWTF::pageheap_memory+57512>) at pthread_cond_wait.c:655
#3  0x00007fb3abca8614 in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7fb3abf8eec0 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x00007fb3abca8659 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb34f7fe700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fb364d47700 (LWP 8329)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e0f1c758) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e0f1c708, cond=0x55a0e0f1c730) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e0f1c730, mutex=0x55a0e0f1c708) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb364d47700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fb36effd700 (LWP 8327)):
#0  0x00007fb3af70e026 in __GI_ppoll (fds=0x7fb350000d18, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fb3acd5e549 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fb3acd5fb26 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fb3acd094aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fb3acb308da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#5  0x00007fb3a7210bd5 in QQmlThreadPrivate::run() () at /usr/lib64/libQt5Qml.so.5
#6  0x00007fb3acb358d0 in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fb3a8734558 in start_thread (arg=0x7fb36effd700) at pthread_create.c:465
#8  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fb36f7fe700 (LWP 8326)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e00edb60) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e00edb10, cond=0x55a0e00edb38) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e00edb38, mutex=0x55a0e00edb10) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb36f7fe700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fb367fff700 (LWP 8325)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e00edb64) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e00edb10, cond=0x55a0e00edb38) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e00edb38, mutex=0x55a0e00edb10) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb367fff700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fb36ffff700 (LWP 8324)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e00eda78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e00eda28, cond=0x55a0e00eda50) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e00eda50, mutex=0x55a0e00eda28) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb36ffff700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fb37ce83700 (LWP 8323)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e00eda7c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e00eda28, cond=0x55a0e00eda50) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e00eda50, mutex=0x55a0e00eda28) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb37ce83700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fb384ef5700 (LWP 8322)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e00eda7c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e00eda28, cond=0x55a0e00eda50) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e00eda50, mutex=0x55a0e00eda28) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb384ef5700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fb3858fb700 (LWP 8321)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e04778b0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e0477860, cond=0x55a0e0477888) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e0477888, mutex=0x55a0e0477860) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb3858fb700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fb3860fc700 (LWP 8320)):
#0  0x00007fb3a873a82d in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55a0e067398c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb3a873a82d in __pthread_cond_wait_common (abstime=0x0, mutex=0x55a0e0673938, cond=0x55a0e0673960) at pthread_cond_wait.c:502
#2  0x00007fb3a873a82d in __pthread_cond_wait (cond=0x55a0e0673960, mutex=0x55a0e0673938) at pthread_cond_wait.c:655
#3  0x00007fb3872f606b in  () at /usr/lib64/dri/radeonsi_dri.so
#4  0x00007fb3872f5f87 in  () at /usr/lib64/dri/radeonsi_dri.so
#5  0x00007fb3a8734558 in start_thread (arg=0x7fb3860fc700) at pthread_create.c:465
#6  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fb38ffff700 (LWP 8318)):
#0  0x00007fb3af70e026 in __GI_ppoll (fds=0x7fb38800e5b8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fb3acd5e549 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fb3acd5fb26 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fb3acd094aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fb3acb308da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#5  0x00007fb3a63afbd5 in QDBusConnectionManager::run() () at /usr/lib64/libQt5DBus.so.5
#6  0x00007fb3acb358d0 in QThreadPrivate::start(void*) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fb3a8734558 in start_thread (arg=0x7fb38ffff700) at pthread_create.c:465
#8  0x00007fb3af7186df in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fb3afd89940 (LWP 8316)):
[KCrash Handler]
#6  0x00007fb387730825 in  () at /usr/lib64/dri/radeonsi_dri.so
#7  0x00007fb38767650d in  () at /usr/lib64/dri/radeonsi_dri.so
#8  0x00007fb387698742 in  () at /usr/lib64/dri/radeonsi_dri.so
#9  0x00007fb387410b33 in  () at /usr/lib64/dri/radeonsi_dri.so
#10 0x00007fb38740ec2f in  () at /usr/lib64/dri/radeonsi_dri.so
#11 0x00007fb38740f0d5 in  () at /usr/lib64/dri/radeonsi_dri.so
#12 0x00007fb38716ab3c in  () at /usr/lib64/dri/radeonsi_dri.so
#13 0x00007fb3a80bbc0c in KWin::GLVertexBuffer::endOfFrame() (this=0x55a0e075f860) at /usr/src/debug/kwin-5.11.5/libkwineffects/kwinglutils.cpp:2201
#14 0x00007fb3af2a2c8f in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) (this=this@entry=0x55a0e00fdb50, damage=..., toplevels=...) at /usr/src/debug/kwin-5.11.5/scene_opengl.cpp:811
#15 0x00007fb3af28aaef in KWin::Compositor::performCompositing() (this=0x55a0e013f390) at /usr/src/debug/kwin-5.11.5/composite.cpp:771
#16 0x00007fb3acd3975b in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#17 0x00007fb3ada81e6c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#18 0x00007fb3ada89164 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#19 0x00007fb3acd0ac98 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#20 0x00007fb3acd61b0e in QTimerInfoList::activateTimers() () at /usr/lib64/libQt5Core.so.5
#21 0x00007fb3acd5fd92 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#22 0x00007fb39779c1fd in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5XcbQpa.so.5
#23 0x00007fb3acd094aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#24 0x00007fb3acd11fe4 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#25 0x00007fb3af9e35f6 in kdemain(int, char**) (argc=<optimized out>, argv=0x7ffc2a610958) at /usr/src/debug/kwin-5.11.5/main_x11.cpp:466
#26 0x00007fb3af640f4a in __libc_start_main (main=0x55a0deb9e830 <main>, argc=2, argv=0x7ffc2a610958, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc2a610948) at ../csu/libc-start.c:308
#27 0x000055a0deb9e86a in _start () at ../sysdeps/x86_64/start.S:120

Reported using DrKonqi