Bug 375023

Application: kwin_x11 (5.8.3)

Qt Version: 5.6.1
Frameworks Version: 5.26.0
Operating System: Linux 4.4.36-8-default x86_64
Distribution: "openSUSE Leap 42.2"

-- Information about the crash:
- What I was doing when the application crashed:
I opened SuseImageWriter, selected an image to write and clicked "write"

When the window for root-legitimation opens, kwin chrashes

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 0x7f9788d69940 (LWP 2676))]

Thread 6 (Thread 0x7f976631e700 (LWP 3508)):
#0  0x00007f97884c9b03 in select () at /lib64/libc.so.6
#1  0x00007f9785b85849 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f9785b870c3 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f9785b87527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f9785b36fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f9785971f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f978050b9b8 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f97859769e9 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f9788797734 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f97884d0d3d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f9757fff700 (LWP 2790)):
#0  0x00007f978879c0af in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f9784afa93b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f9784afa969 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f9788797734 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f97884d0d3d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f97654be700 (LWP 2769)):
#0  0x00007f9785b871f9 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#1  0x00007f9785b87527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f9785b36fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f9785971f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#4  0x00007f978050b9b8 in  () at /usr/lib64/libQt5Qml.so.5
#5  0x00007f97859769e9 in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007f9788797734 in start_thread () at /lib64/libpthread.so.0
#7  0x00007f97884d0d3d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f9767966700 (LWP 2735)):
#0  0x00007f97884c9b03 in select () at /lib64/libc.so.6
#1  0x00007f9785b85849 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f9785b870c3 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f9785b87527 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f9785b36fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f9785971f1a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f977f6de1d5 in  () at /usr/lib64/libQt5DBus.so.5
#7  0x00007f97859769e9 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f9788797734 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f97884d0d3d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f976dbee700 (LWP 2727)):
#0  0x00007f97884c849d in poll () at /lib64/libc.so.6
#1  0x00007f978764a3e2 in  () at /usr/lib64/libxcb.so.1
#2  0x00007f978764bfcf in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007f976ece8839 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f97859769e9 in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f9788797734 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f97884d0d3d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f9788d69940 (LWP 2676)):
[KCrash Handler]
#6  0x00007f97804f7dd0 in QQmlBinding::write(QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f97804f924a in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f97805022f6 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007f978049093b in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007f97804909f7 in QQmlComponentPrivate::completeCreate() () at /usr/lib64/libQt5Qml.so.5
#11 0x00007f9780490880 in QQmlComponent::create(QQmlContext*) () at /usr/lib64/libQt5Qml.so.5
#12 0x00007f97657257cf in  () at /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#13 0x00007f97880f3047 in  () at /usr/lib64/libkwin.so.5
#14 0x00007f9787fd7891 in KWin::Client::createDecoration(QRect const&) () at /usr/lib64/libkwin.so.5
#15 0x00007f9787fd85ab in KWin::Client::updateDecoration(bool, bool) () at /usr/lib64/libkwin.so.5
#16 0x00007f9788039ed6 in KWin::Client::manage(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#17 0x00007f9787fbb994 in KWin::Workspace::createClient(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#18 0x00007f97880280e0 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib64/libkwin.so.5
#19 0x00007f9785b36270 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#20 0x00007f976ece6be4 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#21 0x00007f976ece8c3b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#22 0x00007f9785b64166 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#23 0x00007f9786843e3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#24 0x00007f978684849a in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#25 0x00007f9785b38fc5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#26 0x00007f9785b3adaa in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#27 0x00007f9785b874b4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#28 0x00007f976ed4a94d in  () at /usr/lib64/libQt5XcbQpa.so.5
#29 0x00007f9785b36fdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#30 0x00007f9785b3eec6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#31 0x00007f97889b89cc in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#32 0x00007f97884076e5 in __libc_start_main () at /lib64/libc.so.6
#33 0x0000000000400809 in _start ()

Reported using DrKonqi