Bug 366012

Application: kwin_x11 (5.7.0)

Qt Version: 5.6.1
Frameworks Version: 5.23.0
Operating System: Linux 4.6.3 x86_64
Distribution: Debian GNU/Linux unstable (sid)

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

Had just started KDE (logged in from sccm).

- Custom settings of the application:

The laptop has a high dpi display. I have set a high dpi value in Xorg.conf.

The crash can be reproduced sometimes.

-- 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 0x7f65b4ea0940 (LWP 3042))]

Thread 6 (Thread 0x7f65a21cf700 (LWP 3425)):
#0  0x00007f65ca38a5a6 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f65ca38a972 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f65ca335e4a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f65ca15e9e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f65c4c0c405 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#5  0x00007f65ca163808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f65c5aa8464 in start_thread (arg=0x7f65a21cf700) at pthread_create.c:333
#7  0x00007f65cc4f930d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f65a2ffe700 (LWP 3107)):
#0  0x00007f65c5aae09f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f65c94fe574 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f65c94fe5b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f65c5aa8464 in start_thread (arg=0x7f65a2ffe700) at pthread_create.c:333
#4  0x00007f65cc4f930d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f65a3fff700 (LWP 3102)):
#0  0x00007f65cc4f1f73 in select () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f65ca388a1f in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f65ca38a45e in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f65ca38a972 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f65ca335e4a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f65ca15e9e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f65c4c0c405 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f65ca163808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f65c5aa8464 in start_thread (arg=0x7f65a3fff700) at pthread_create.c:333
#9  0x00007f65cc4f930d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f65b2118700 (LWP 3066)):
#0  0x00007f65ca38a5a6 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f65ca38a972 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f65ca335e4a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f65ca15e9e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f65ccb07515 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#5  0x00007f65ca163808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f65c5aa8464 in start_thread (arg=0x7f65b2118700) at pthread_create.c:333
#7  0x00007f65cc4f930d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f65b3fac700 (LWP 3059)):
#0  0x00007f65cc4f019d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f65cb683382 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f65cb684ff7 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f65b4a52a89 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f65ca163808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f65c5aa8464 in start_thread (arg=0x7f65b3fac700) at pthread_create.c:333
#6  0x00007f65cc4f930d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f65b4ea0940 (LWP 3042)):
[KCrash Handler]
#6  0x00007f65c4bf8339 in QQmlBinding::write(QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f65c4bf928a in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f65c4c0259f in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f65c4b8f04e in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f65c4b8f117 in QQmlComponentPrivate::completeCreate() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f65c4b8ef80 in QQmlComponent::create(QQmlContext*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f65b03380c7 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#13 0x00007f65cc120a01 in  () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#14 0x00007f65cc0081d9 in KWin::Client::createDecoration(QRect const&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#15 0x00007f65cc008b93 in KWin::Client::updateDecoration(bool, bool) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#16 0x00007f65cc0651a6 in KWin::Client::manage(unsigned int, bool) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#17 0x00007f65cbfeb6af in KWin::Workspace::createClient(unsigned int, bool) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#18 0x00007f65cc052881 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#19 0x00007f65ca334fbf in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f65b4a56a05 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#21 0x00007f65b4a57966 in QXcbConnection::processXcbEvents() () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#22 0x00007f65ca365569 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f65cac6fafc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f65cac75036 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007f65ca3380f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f65ca339fba in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f65ca38a852 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f65b4ac665d in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#29 0x00007f65ca335e4a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f65ca33e50c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f65cc7bc226 in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#32 0x00007f65cc432730 in __libc_start_main (main=0x400730, argc=3, argv=0x7fff2f69c658, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2f69c648) at ../csu/libc-start.c:291
#33 0x0000000000400769 in _start ()

Reported using DrKonqi