Bug 394687

Application: kwin_x11 (5.12.90)

Qt Version: 5.10.0
Frameworks Version: 5.46.0
Operating System: Linux 4.16.10-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
Kwin crashes with seg fault immediately after login. Might be related to bug #: 394571

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 0x7f5757434840 (LWP 5343))]

Thread 3 (Thread 0x7f5734b3d700 (LWP 5348)):
#0  0x00007f5756d9e276 in ppoll () from /lib64/libc.so.6
#1  0x00007f57541c89f9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f57541c9fd6 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f575417395a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f5753f9abaa in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#5  0x00007f574e8e5115 in ?? () from /usr/lib64/libQt5Qml.so.5
#6  0x00007f5753f9fba0 in ?? () from /usr/lib64/libQt5Core.so.5
#7  0x00007f574fe1459b in start_thread () from /lib64/libpthread.so.0
#8  0x00007f5756da8a1f in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f57370ec700 (LWP 5345)):
#0  0x00007f5756d9e276 in ppoll () from /lib64/libc.so.6
#1  0x00007f57541c89f9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f57541c9fd6 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f575417395a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f5753f9abaa in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#5  0x00007f574d795a35 in ?? () from /usr/lib64/libQt5DBus.so.5
#6  0x00007f5753f9fba0 in ?? () from /usr/lib64/libQt5Core.so.5
#7  0x00007f574fe1459b in start_thread () from /lib64/libpthread.so.0
#8  0x00007f5756da8a1f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f5757434840 (LWP 5343)):
[KCrash Handler]
#6  0x00007f5755810cfd in NETWinInfo::setState (this=0x7f575421d640 <QArrayData::shared_null>, state=..., mask=...) at /usr/src/debug/kwindowsystem-5.46.0-165.1.x86_64/src/platforms/xcb/netwm.cpp:2871
#7  0x00007f5756862be5 in KWin::AbstractClient::setKeepAbove (this=0x55d9d02ac5d0, b=false) at /usr/src/debug/kwin5-5.12.90-247.2.x86_64/abstract_client.cpp:317
#8  0x00007f5756862b86 in KWin::AbstractClient::setKeepBelow (this=0x55d9d02ac5d0, b=42) at /usr/src/debug/kwin5-5.12.90-247.2.x86_64/abstract_client.cpp:334
#9  0x00007f57568ebcb7 in KWin::Workspace::performWindowOperation (this=0x55d9d03093a0, c=0x55d9d02ac5d0, op=<optimized out>) at /usr/src/debug/kwin5-5.12.90-247.2.x86_64/useractions.cpp:1154
#10 0x00007f5752849105 in KDecoration2::DecoratedClient::color(KDecoration2::ColorGroup, KDecoration2::ColorRole) const () from /usr/lib64/libkdecorations2.so.5
#11 0x00007f57358b5cfa in Breeze::Decoration::titleBarColor (this=this@entry=0x55d9d03f6170) at /usr/src/debug/breeze-5.12.90-206.1.x86_64/kdecoration/breezedecoration.cpp:114
#12 0x00007f57358b75e0 in Breeze::Decoration::paintTitleBar (this=this@entry=0x55d9d03f6170, painter=painter@entry=0x7ffc316d0f88, repaintRegion=...) at /usr/src/debug/breeze-5.12.90-206.1.x86_64/kdecoration/breezedecoration.cpp:488
#13 0x00007f57358b7d29 in Breeze::Decoration::paint (this=0x55d9d03f6170, painter=0x7ffc316d0f88, repaintRegion=...) at /usr/src/debug/breeze-5.12.90-206.1.x86_64/kdecoration/breezedecoration.cpp:456
#14 0x00007f575698ffdd in KWin::Decoration::Renderer::renderToImage (this=this@entry=0x55d9d03ebf60, geo=...) at /usr/src/debug/kwin5-5.12.90-247.2.x86_64/decorations/decorationrenderer.cpp:77
#15 0x00007f57366c8345 in KWin::Decoration::X11Renderer::<lambda(const QRect&)>::operator() (geo=..., __closure=<synthetic pointer>) at /usr/src/debug/kwin5-5.12.90-247.2.x86_64/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp:94
#16 KWin::Decoration::X11Renderer::render (this=0x55d9d03ebf60) at /usr/src/debug/kwin5-5.12.90-247.2.x86_64/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp:100
#17 0x00007f57541a336c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#18 0x00007f57541af6e7 in QTimer::timeout(QTimer::QPrivateSignal) () from /usr/lib64/libQt5Core.so.5
#19 0x00007f57541afa18 in QTimer::timerEvent(QTimerEvent*) () from /usr/lib64/libQt5Core.so.5
#20 0x00007f57541a3c0b in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#21 0x00007f5754efe01c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#22 0x00007f5754f05314 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#23 0x00007f5754175148 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#24 0x00007f57541cbfbe in QTimerInfoList::activateTimers() () from /usr/lib64/libQt5Core.so.5
#25 0x00007f57541ca242 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#26 0x00007f573e872a1d in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#27 0x00007f575417395a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#28 0x00007f575417c494 in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#29 0x00007f575707660b in kdemain (argc=<optimized out>, argv=0x7ffc316d18d8) at /usr/src/debug/kwin5-5.12.90-247.2.x86_64/main_x11.cpp:468
#30 0x00007f5756cd0a87 in __libc_start_main () from /lib64/libc.so.6
#31 0x000055d9cea897fa in _start () at ../sysdeps/x86_64/start.S:120

Reported using DrKonqi