Application: kwin_x11 (5.13.5)

Qt Version: 5.11.1
Frameworks Version: 5.49.0
Operating System: Linux 4.18.5-zen1-1-zen x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
Kwin caused the screen to flicker and got a notice that it crashed

The crash does not seem to be reproducible.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9a078d96c0 (LWP 17595))]

Thread 7 (Thread 0x7f99ea739700 (LWP 22143)):
#0  0x00007f9a15ad2ca6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f9a142b637b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9a142b786b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f9a14265dac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9a140aef59 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f9a10b200d9 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f9a140b9005 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9a116e7a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9a15adda43 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f99e9f38700 (LWP 17758)):
#0  0x00007f9a116edafc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f9a137ccaac in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f9a137ccac9 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f9a116e7a9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f9a15adda43 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f99ebfff700 (LWP 17752)):
#0  0x00007f9a116edafc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f99fc931264 in  () at /usr/lib/dri/i965_dri.so
#2  0x00007f99fc930f58 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007f9a116e7a9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f9a15adda43 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f99ff635700 (LWP 17677)):
#0  0x00007f9a15ad2ca6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f9a142b637b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f9a142b786b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f9a14265dac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f9a140aef59 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f9a10b200d9 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f9a140b9005 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9a116e7a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f9a15adda43 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f9a054e9700 (LWP 17611)):
#0  0x00007f9a15aeb04b in __lll_lock_wait_private () at /usr/lib/libc.so.6
#1  0x00007f9a15a684ae in realloc () at /usr/lib/libc.so.6
#2  0x00007f9a15aeebde in __vasprintf_chk () at /usr/lib/libc.so.6
#3  0x00007f9a0f6da6bc in  () at /usr/lib/libsystemd.so.0
#4  0x00007f9a0f6e0453 in sd_journal_send () at /usr/lib/libsystemd.so.0
#5  0x00007f9a140a983b in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f9a140a4956 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f9a140a4d19 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f9a14075087 in QMessageLogger::warning(char const*, ...) const () at /usr/lib/libQt5Core.so.5
#9  0x00007f9a1408b93f in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f9a142b7575 in QEventDispatcherUNIXPrivate::activateSocketNotifiers() () at /usr/lib/libQt5Core.so.5
#11 0x00007f9a142b7939 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#12 0x00007f9a14265dac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#13 0x00007f9a140aef59 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#14 0x00007f9a105fcba6 in  () at /usr/lib/libQt5DBus.so.5
#15 0x00007f9a140b9005 in  () at /usr/lib/libQt5Core.so.5
#16 0x00007f9a116e7a9d in start_thread () at /usr/lib/libpthread.so.0
#17 0x00007f9a15adda43 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f9a069ae700 (LWP 17598)):
#0  0x00007f9a15ad2bb1 in poll () at /usr/lib/libc.so.6
#1  0x00007f9a153e5180 in  () at /usr/lib/libxcb.so.1
#2  0x00007f9a153e6e4b in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f9a07462e1a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f9a140b9005 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f9a116e7a9d in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f9a15adda43 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f9a078d96c0 (LWP 17595)):
[KCrash Handler]
#6  0x00007f9a15a65b79 in _int_malloc () at /usr/lib/libc.so.6
#7  0x00007f9a15a67ada in malloc () at /usr/lib/libc.so.6
#8  0x00007f9a13ef65fd in operator new(unsigned long) (sz=48) at /build/gcc/src/gcc/libstdc++-v3/libsupc++/new_op.cc:50
#9  0x00007f9a148b3844 in QRegion::copy() const () at /usr/lib/libQt5Gui.so.5
#10 0x00007f9a148b3952 in QRegion::detach() () at /usr/lib/libQt5Gui.so.5
#11 0x00007f9a148b40ce in QRegion::translate(int, int) () at /usr/lib/libQt5Gui.so.5
#12 0x00007f9a148b41f0 in QRegion::translated(int, int) const () at /usr/lib/libQt5Gui.so.5
#13 0x00007f9a1584eecd in KWin::Scene::paintSimpleScreen(int, QRegion) () at /usr/lib/libkwin.so.5
#14 0x00007f99fe3db464 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#15 0x00007f9a158525a1 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#16 0x00007f9a15860607 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#17 0x00007f9a1585223b in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /usr/lib/libkwin.so.5
#18 0x00007f99fe3e2a97 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#19 0x00007f9a15843ace in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#20 0x00007f9a142917eb in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#21 0x00007f9a14be1e14 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#22 0x00007f9a14be96e1 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#23 0x00007f9a14267119 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#24 0x00007f9a142b987a in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#25 0x00007f9a142b79be in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#26 0x00007f9a074f85ce in  () at /usr/lib/libQt5XcbQpa.so.5
#27 0x00007f9a14265dac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#28 0x00007f9a1426e0a6 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#29 0x00007f9a15bafb26 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#30 0x00007f9a15a06223 in __libc_start_main () at /usr/lib/libc.so.6
#31 0x00005622ba58305e in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 372901.

Possible duplicates by query: bug 372901, bug 369453.

Reported using DrKonqi