Application: kwin_x11 (5.6.5)
 (Compiled from sources)
Qt Version: 5.6.1
Frameworks Version: 5.23.0
Operating System: Linux 4.4.6-gentoo x86_64
Distribution (Platform): Gentoo Packages

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

In system settings -> Window Decorations, I switched to the Plastik window theme and clicked "Apply". KWin crashed but then started up again with the Plastik theme.

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 0x7f74b26c1800 (LWP 10696))]

Thread 6 (Thread 0x7f749e002700 (LWP 10699)):
#0  0x00007f74b1f855fd in poll () from /lib64/libc.so.6
#1  0x00007f74b036ab12 in poll (__timeout=-1, __nfds=1, __fds=0x7f749e001cc0) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x1702d30, cond=cond@entry=0x1702d70, vector=vector@entry=0x0, count=count@entry=0x0) at /usr/src/debug/x11-libs/libxcb-1.11.1/libxcb-1.11.1/src/xcb_conn.c:459
#3  0x00007f74b036c8ef in xcb_wait_for_event (c=0x1702d30) at /usr/src/debug/x11-libs/libxcb-1.11.1/libxcb-1.11.1/src/xcb_in.c:693
#4  0x00007f749eaaf029 in QXcbEventReader::run() () from /usr/lib64/libQt5XcbQpa.so.5
#5  0x00007f74b062b95c in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#6  0x00007f74b2249494 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f74b1f8e5dd in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f74973eb700 (LWP 10701)):
#0  0x00007f74b1f872f3 in select () from /lib64/libc.so.6
#1  0x00007f74b08163b1 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f74b0817a9e in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f74b0817fdd in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f74b07cc5ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f74b0627204 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007f74b27d3235 in QDBusConnectionManager::run() () from /usr/lib64/libQt5DBus.so.5
#7  0x00007f74b062b95c in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#8  0x00007f74b2249494 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f74b1f8e5dd in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f748710f700 (LWP 10705)):
#0  0x00007f74b0817be6 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () from /usr/lib64/libQt5Core.so.5
#1  0x00007f74b0817fdd in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f74b07cc5ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f74b0627204 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#4  0x00007f74aac8fa25 in QQmlThreadPrivate::run() () from /usr/lib64/libQt5Qml.so.5
#5  0x00007f74b062b95c in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#6  0x00007f74b2249494 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f74b1f8e5dd in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f7486086700 (LWP 10706)):
#0  0x00007f74b224f0bf in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f74af7c0264 in QTWTF::TCMalloc_PageHeap::scavengerThread() () from /usr/lib64/libQt5Script.so.5
#2  0x00007f74af7c02a9 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib64/libQt5Script.so.5
#3  0x00007f74b2249494 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f74b1f8e5dd in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f7494ca1700 (LWP 10736)):
#0  0x00007f74b1f872f3 in select () from /lib64/libc.so.6
#1  0x00007f74b08163b1 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f74b0817a9e in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f74b0817fdd in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f74b07cc5ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f74b0627204 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007f74aac8fa25 in QQmlThreadPrivate::run() () from /usr/lib64/libQt5Qml.so.5
#7  0x00007f74b062b95c in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#8  0x00007f74b2249494 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f74b1f8e5dd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f74b26c1800 (LWP 10696)):
[KCrash Handler]
#6  0x00007f74aac7a3b0 in QQmlBinding::write(QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib64/libQt5Qml.so.5
#7  0x00007f74aac7ba1a in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib64/libQt5Qml.so.5
#8  0x00007f74aac85669 in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () from /usr/lib64/libQt5Qml.so.5
#9  0x00007f74aac0cadb in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () from /usr/lib64/libQt5Qml.so.5
#10 0x00007f74aac0cb97 in QQmlComponentPrivate::completeCreate() () from /usr/lib64/libQt5Qml.so.5
#11 0x00007f74aac0f820 in QQmlComponent::create(QQmlContext*) () from /usr/lib64/libQt5Qml.so.5
#12 0x00007f7494f2056b in Aurorae::Decoration::init() () from /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#13 0x00007f74b1babba8 in KWin::Decoration::DecorationBridge::createDecoration(KWin::AbstractClient*) () from /usr/lib64/libkwin.so.5
#14 0x00007f74b1a8e159 in KWin::Client::createDecoration(QRect const&) () from /usr/lib64/libkwin.so.5
#15 0x00007f74b1a8eb8b in KWin::Client::updateDecoration(bool, bool) () from /usr/lib64/libkwin.so.5
#16 0x00007f74b1a72a5f in KWin::Workspace::forEachAbstractClient(std::function<void (KWin::AbstractClient*)>) () from /usr/lib64/libkwin.so.5
#17 0x00007f74b1baa756 in KWin::Decoration::recreateDecorations() () from /usr/lib64/libkwin.so.5
#18 0x00007f74b1bacf17 in KWin::Decoration::DecorationBridge::reconfigure() () from /usr/lib64/libkwin.so.5
#19 0x00007f74b07f51a2 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#20 0x00007f74b1a6e3ff in KWin::Workspace::slotReconfigure() () from /usr/lib64/libkwin.so.5
#21 0x00007f74b07f4b3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#22 0x00007f74b0801c28 in QTimer::timerEvent(QTimerEvent*) () from /usr/lib64/libQt5Core.so.5
#23 0x00007f74b07f606b in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#24 0x00007f74b10196fc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#25 0x00007f74b101de42 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#26 0x00007f74b07cda30 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#27 0x00007f74b081966e in QTimerInfoList::activateTimers() () from /usr/lib64/libQt5Core.so.5
#28 0x00007f74b0817fab in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#29 0x00007f749eb151bd in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5XcbQpa.so.5
#30 0x00007f74b07cc5ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#31 0x00007f74b07d408c in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#32 0x00007f74b2463abf in kdemain () from /usr/lib64/libkdeinit5_kwin_x11.so
#33 0x00007f74b1ec5620 in __libc_start_main () from /lib64/libc.so.6
#34 0x0000000000400819 in _start ()

Possible duplicates by query: bug 366443, bug 366331, bug 366240, bug 366198, bug 366126.

Reported using DrKonqi