Application: kwin_x11 (5.9.4)

Qt Version: 5.7.1
Frameworks Version: 5.31.0
Operating System: Linux 4.10.0-24-lowlatency x86_64
Distribution: Ubuntu 17.04

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

I was tryint to login in into systems. It crashes each time. The problem started after 'apt upgrade' made at 20th f June 2017.

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 0x7fe6634ec940 (LWP 4797))]

Thread 4 (Thread 0x7fe637fff700 (LWP 4974)):
#0  0x00007fe65c623510 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe65f94e2c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fe65f94e309 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fe65c61d6da in start_thread (arg=0x7fe637fff700) at pthread_create.c:456
#4  0x00007fe662f29d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7fe6411f9700 (LWP 4971)):
#0  0x00007fe662f1de51 in __GI_ppoll (fds=0x7fe630000ac8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007fe6607e4251 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fe6607e5b4a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fe66079288a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe6605bffe3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe65b38adf5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fe6605c4c98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe65c61d6da in start_thread (arg=0x7fe6411f9700) at pthread_create.c:456
#8  0x00007fe662f29d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fe64b173700 (LWP 4813)):
#0  0x00007fe662f1dd8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fe657c23576 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe657c2368c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe6607e8f2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe66079288a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe6605bffe3 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe65a5635c5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fe6605c4c98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe65c61d6da in start_thread (arg=0x7fe64b173700) at pthread_create.c:456
#9  0x00007fe662f29d7f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fe6634ec940 (LWP 4797)):
[KCrash Handler]
#6  0x00007fe635c118d4 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#7  0x00007fe635c16515 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#8  0x00007fe635c166eb in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#9  0x00007fe635c0f986 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#10 0x00007fe635914359 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#11 0x00007fe635be98c4 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#12 0x00007fe635be9fde in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#13 0x00007fe635bea6fa in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#14 0x00007fe635baa026 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#15 0x00007fe65900945e in  () at /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
#16 0x00007fe658fdc0cc in glXMakeCurrentReadSGI () at /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
#17 0x00007fe6485d55c8 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#18 0x00007fe6485d3987 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#19 0x00007fe64a0a3451 in QXcbIntegration::createPlatformOpenGLContext(QOpenGLContext*) const () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#20 0x00007fe660d15f3d in QOpenGLContext::create() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#21 0x00007fe65ba4d25b in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007fe65ba4dc88 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007fe660ce4475 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#24 0x00007fe65ba8a245 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#25 0x00007fe636ad140b in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#26 0x00007fe66146c35c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fe661473b11 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fe6607948a0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fe660cd970d in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#30 0x00007fe660cda31d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#31 0x00007fe660cb823b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#32 0x00007fe64a116a06 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#33 0x00007fe66079288a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fe66079affc in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fe6631f1112 in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#36 0x00007fe662e413f1 in __libc_start_main (main=0x5574901c77e0, argc=1, argv=0x7ffe9ee8f8c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe9ee8f8b8) at ../csu/libc-start.c:291
#37 0x00005574901c781a in _start ()

Reported using DrKonqi