Bug 416673

Application: kwin_x11 (5.12.9)

Qt Version: 5.9.5
Frameworks Version: 5.47.0
Operating System: Linux 4.15.0-74-generic x86_64
Distribution: Ubuntu 18.04.3 LTS

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

While playing a wonky VLC video (downloaded from YouTube), KWin crashed and immediately restarted.

-- 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 0x7fd30d402cc0 (LWP 1772))]

Thread 9 (Thread 0x7fd22cd46700 (LWP 17224)):
#0  0x00007fd305d2d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55da000b9d74) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fd305d2d9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da000b9d20, cond=0x55da000b9d48) at pthread_cond_wait.c:502
#2  0x00007fd305d2d9f3 in __pthread_cond_wait (cond=0x55da000b9d48, mutex=0x55da000b9d20) at pthread_cond_wait.c:655
#3  0x00007fd309efd5ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd304ee66a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fd304ee6b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fd309efc17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd305d276db in start_thread (arg=0x7fd22cd46700) at pthread_create.c:463
#8  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fd239f0f700 (LWP 17221)):
#0  0x00007fd30cd5ccf6 in __GI_ppoll (fds=0x7fd234000f08, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fd30a12f651 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fd30a130d6e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fd30a0d89fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd309ef723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd3047f06f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fd309efc17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd305d276db in start_thread (arg=0x7fd239f0f700) at pthread_create.c:463
#8  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fd2eb3d7700 (LWP 15657)):
#0  0x00007fd305d2d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55d9ff3a44e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fd305d2d9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55d9ff3a4490, cond=0x55d9ff3a44b8) at pthread_cond_wait.c:502
#2  0x00007fd305d2d9f3 in __pthread_cond_wait (cond=0x55d9ff3a44b8, mutex=0x55d9ff3a4490) at pthread_cond_wait.c:655
#3  0x00007fd309efd5ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd304ee66a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fd304ee6b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fd309efc17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd305d276db in start_thread (arg=0x7fd2eb3d7700) at pthread_create.c:463
#8  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fd2d5837700 (LWP 11494)):
#0  0x00007fd305d2d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55d9ff8ba9a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fd305d2d9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55d9ff8ba950, cond=0x55d9ff8ba978) at pthread_cond_wait.c:502
#2  0x00007fd305d2d9f3 in __pthread_cond_wait (cond=0x55d9ff8ba978, mutex=0x55d9ff8ba950) at pthread_cond_wait.c:655
#3  0x00007fd309efd5ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd304ee66a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fd304ee6b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fd309efc17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd305d276db in start_thread (arg=0x7fd2d5837700) at pthread_create.c:463
#8  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fd2e8f97700 (LWP 6369)):
#0  0x00007fd30cd5ccf6 in __GI_ppoll (fds=0x7fd2dc04d138, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fd30a12f651 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fd30a130d6e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fd30a0d89fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd309ef723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd3047f06f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fd309efc17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd305d276db in start_thread (arg=0x7fd2e8f97700) at pthread_create.c:463
#8  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fd2cffff700 (LWP 2164)):
#0  0x00007fd305d2d9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fd309318fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fd305d2d9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fd309318f68, cond=0x7fd309318f90) at pthread_cond_wait.c:502
#2  0x00007fd305d2d9f3 in __pthread_cond_wait (cond=0x7fd309318f90, mutex=0x7fd309318f68) at pthread_cond_wait.c:655
#3  0x00007fd3090225f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fd309022639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fd305d276db in start_thread (arg=0x7fd2cffff700) at pthread_create.c:463
#6  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fd2ea5bf700 (LWP 1990)):
#0  0x00007fd30cd5ccf6 in __GI_ppoll (fds=0x7fd2d8000d28, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fd30a12f651 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fd30a130d6e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fd30a0d89fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd309ef723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd3047f06f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fd309efc17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd305d276db in start_thread (arg=0x7fd2ea5bf700) at pthread_create.c:463
#8  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fd2f11a7700 (LWP 1792)):
#0  0x00007fd30cd5ccf6 in __GI_ppoll (fds=0x7fd2e400eef8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fd30a12f651 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fd30a130d6e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fd30a0d89fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd309ef723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd3036a5d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007fd309efc17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd305d276db in start_thread (arg=0x7fd2f11a7700) at pthread_create.c:463
#8  0x00007fd30cd6988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fd30d402cc0 (LWP 1772)):
[KCrash Handler]
#6  0x00000000412b0bfb in  ()
#7  0x00007fd2d73f1324 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.390.116
#8  0x00007fd2d73f6768 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.390.116
#9  0x00007fd2d6fb9208 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.390.116
#10 0x00007fd30a9ebff5 in QOpenGLTextureGlyphCache::resizeTextureData(int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007fd30a97091a in QTextureGlyphCache::fillInPendingGlyphs() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007fd304ecfc56 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fd304ecc949 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fd304f7b158 in QQuickTextNode::addGlyphs(QPointF const&, QGlyphRun const&, QColor const&, QQuickText::TextStyle, QColor const&, QSGNode*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007fd304f80264 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007fd304f7c0ba in QQuickTextNode::addTextLayout(QPointF const&, QTextLayout*, QColor const&, QQuickText::TextStyle, QColor const&, QColor const&, QColor const&, QColor const&, int, int, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007fd304f7ad21 in QQuickText::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007fd304f35a18 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007fd304f36293 in QQuickWindowPrivate::updateDirtyNodes() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007fd304f37512 in QQuickWindowPrivate::syncSceneGraph() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007fd304ff04a8 in QQuickRenderControl::grab() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007fd2ea7fd292 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#23 0x00007fd30a10975f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fd30a1160b7 in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fd30a116418 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fd30a10a16b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fd30ae6483c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fd30ae6c104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fd30a0da9c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fd30a132e1e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fd30a130fd2 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007fd2f479766d in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#33 0x00007fd30a0d89fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fd30a0e1aa4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fd30d048dbb in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#36 0x00007fd30cc69b97 in __libc_start_main (main=0x55d9fddd0730, argc=1, argv=0x7ffd21b109a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd21b10998) at ../csu/libc-start.c:310
#37 0x000055d9fddd076a in _start ()

Reported using DrKonqi