Application: kwin_x11 (5.8.4)
 (Compiled from sources)
Qt Version: 5.6.2
Frameworks Version: 5.28.0
Operating System: Linux 4.8.0 x86_64
Distribution (Platform): Gentoo Packages

-- Information about the crash:
- What I was doing when the application crashed:
Started konsole and dolphin as root, chromium as normal user.

- Unusual behavior I noticed:
Kwin crashes always.

- Custom settings of the application:
explained above, nothing much other then running as root konsole and dolphin.
I'm using gentoo, which means everything is compiled locally.
I can't run opengl nvidia libraries, they won't allow running  plasma 5, so here follows the configuration for these libraries:
# eselect opencl list
Available OpenCL implementations:
  [1]   mesa *
  [2]   nvidia
# eselect opengl list
Available OpenGL implementations:
  [1]   nvidia
  [2]   xorg-x11 *

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f79dbf7b880 (LWP 778))]

Thread 14 (Thread 0x7f79b5cd9700 (LWP 994)):
#0  0x00007f79dba9e33b in clock_gettime () from /lib64/libc.so.6
#1  0x00007f79d98755f3 in ?? () from /usr/lib64/libQt5Core.so.5
#2  0x00007f79d99c4e89 in QTimerInfoList::updateCurrentTime() () from /usr/lib64/libQt5Core.so.5
#3  0x00007f79d99c436b in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f79d99c491a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f79d9976182 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#6  0x00007f79d97d381e in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#7  0x00007f79d46bf805 in ?? () from /usr/lib64/libQt5Qml.so.5
#8  0x00007f79d97d7eaf in ?? () from /usr/lib64/libQt5Core.so.5
#9  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7f7918ec2700 (LWP 961)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7f79196c3700 (LWP 960)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7f7919ec4700 (LWP 959)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f791a6c5700 (LWP 958)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f791aec6700 (LWP 957)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f791b6c7700 (LWP 956)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f791bec8700 (LWP 955)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f791c6c9700 (LWP 954)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7925549043 in ?? () from /usr/lib64/dri/swrast_dri.so
#2  0x00007f7925548e7f in ?? () from /usr/lib64/dri/swrast_dri.so
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f79a7f9f700 (LWP 866)):
#0  0x00007f79d578ef3f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f79d8affad4 in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007f79d8affb19 in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f79b5011700 (LWP 856)):
#0  0x00007f79dba8a293 in select () from /lib64/libc.so.6
#1  0x00007f79d99c2f7f in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f79d99c4403 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f79d99c491a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f79d9976182 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f79d97d381e in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007f79d46bf805 in ?? () from /usr/lib64/libQt5Qml.so.5
#7  0x00007f79d97d7eaf in ?? () from /usr/lib64/libQt5Core.so.5
#8  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f79b7b61700 (LWP 827)):
#0  0x00007f79dba8a293 in select () from /lib64/libc.so.6
#1  0x00007f79d99c2f7f in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f79d99c4403 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f79d99c491a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f79d9976182 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f79d97d381e in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007f79dc097485 in ?? () from /usr/lib64/libQt5DBus.so.5
#7  0x00007f79d97d7eaf in ?? () from /usr/lib64/libQt5Core.so.5
#8  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f79bd7b1700 (LWP 825)):
#0  0x00007f79dba8850d in poll () from /lib64/libc.so.6
#1  0x00007f79dabee88a in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007f79dabf0827 in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f79be475239 in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f79d97d7eaf in ?? () from /usr/lib64/libQt5Core.so.5
#5  0x00007f79d57893c6 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f79dba9161d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f79dbf7b880 (LWP 778)):
[KCrash Handler]
#6  0x00007f79d46ab721 in QQmlBinding::write(QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib64/libQt5Qml.so.5
#7  0x00007f79d46ac64a in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib64/libQt5Qml.so.5
#8  0x00007f79d46b59de in ?? () from /usr/lib64/libQt5Qml.so.5
#9  0x00007f79d46413c6 in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () from /usr/lib64/libQt5Qml.so.5
#10 0x00007f79d464147f in QQmlComponentPrivate::completeCreate() () from /usr/lib64/libQt5Qml.so.5
#11 0x00007f79d46412f1 in QQmlComponent::create(QQmlContext*) () from /usr/lib64/libQt5Qml.so.5
#12 0x00007f79b525001d in ?? () from /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#13 0x00007f79db6b4469 in ?? () from /usr/lib64/libkwin.so.5
#14 0x00007f79db58ff74 in KWin::Client::createDecoration(QRect const&) () from /usr/lib64/libkwin.so.5
#15 0x00007f79db590cc5 in KWin::Client::updateDecoration(bool, bool) () from /usr/lib64/libkwin.so.5
#16 0x00007f79db5f209d in KWin::Client::manage(unsigned int, bool) () from /usr/lib64/libkwin.so.5
#17 0x00007f79db572ae5 in KWin::Workspace::createClient(unsigned int, bool) () from /usr/lib64/libkwin.so.5
#18 0x00007f79db5df310 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () from /usr/lib64/libkwin.so.5
#19 0x00007f79d997518c in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () from /usr/lib64/libQt5Core.so.5
#20 0x00007f79be4791a5 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /usr/lib64/libQt5XcbQpa.so.5
#21 0x00007f79be47a14e in QXcbConnection::processXcbEvents() () from /usr/lib64/libQt5XcbQpa.so.5
#22 0x00007f79d99a017a in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#23 0x00007f79da1f4314 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#24 0x00007f79da1f98a7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#25 0x00007f79d9977341 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#26 0x00007f79d997934b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQt5Core.so.5
#27 0x00007f79d99c47e3 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#28 0x00007f79be4ea615 in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#29 0x00007f79d9976182 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#30 0x00007f79d997dc24 in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#31 0x00007f79dbd4b26d in kdemain () from /usr/lib64/libkdeinit5_kwin_x11.so
#32 0x00007f79db9ca670 in __libc_start_main () from /lib64/libc.so.6
#33 0x0000000000400719 in _start ()

Possible duplicates by query: bug 372962, bug 372817, bug 372663, bug 372495, bug 372413.

Reported using DrKonqi