Application: kwin_x11 (5.6.3) (Compiled from sources) Qt Version: 5.6.0 Frameworks Version: 5.21.0 Operating System: Linux 4.4.8 x86_64 Distribution (Platform): Slackware Packages -- Information about the crash: I was open VirtualBox program to open its settings and applies them the error happens, just only press the ok the screen flashes kwin closes and a few seconds it opens again and comes to Feedback kde an application unexpectedly closed. 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 0x7fdb3e029800 (LWP 1548))] Thread 6 (Thread 0x7fdb2419c700 (LWP 1568)): #0 0x00007fdb32d7730d in poll () at /lib64/libc.so.6 #1 0x00007fdb33de0102 in () at /usr/lib64/libxcb.so.1 #2 0x00007fdb33de1c8f in xcb_wait_for_event () at /usr/lib64/libxcb.so.1 #3 0x00007fdb24c7ae59 in () at /usr/lib64/qt5/plugins/platforms/../../../libQt5XcbQpa.so.5 #4 0x00007fdb3409d509 in () at /usr/lib64/libQt5Core.so.5 #5 0x00007fdb3647c684 in start_thread () at /lib64/libpthread.so.0 #6 0x00007fdb32d82efd in clone () at /lib64/libc.so.6 Thread 5 (Thread 0x7fdb22550700 (LWP 1591)): #0 0x00007fdb32d79083 in select () at /lib64/libc.so.6 #1 0x00007fdb342ae3ff in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5 #2 0x00007fdb342afc94 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5 #3 0x00007fdb342b0142 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007fdb3425e62a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007fdb3409895c in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #6 0x00007fdb35daa0f5 in () at /usr/lib64/libQt5DBus.so.5 #7 0x00007fdb3409d509 in () at /usr/lib64/libQt5Core.so.5 #8 0x00007fdb3647c684 in start_thread () at /lib64/libpthread.so.0 #9 0x00007fdb32d82efd in clone () at /lib64/libc.so.6 Thread 4 (Thread 0x7fdb13fff700 (LWP 1622)): #0 0x00007fdb32d79083 in select () at /lib64/libc.so.6 #1 0x00007fdb342ae3ff in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5 #2 0x00007fdb342afc94 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5 #3 0x00007fdb342b0142 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007fdb3425e62a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007fdb3409895c in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #6 0x00007fdb3ba41c15 in () at /usr/lib64/libQt5Qml.so.5 #7 0x00007fdb3409d509 in () at /usr/lib64/libQt5Core.so.5 #8 0x00007fdb3647c684 in start_thread () at /lib64/libpthread.so.0 #9 0x00007fdb32d82efd in clone () at /lib64/libc.so.6 Thread 3 (Thread 0x7fdb0bfff700 (LWP 1635)): #0 0x00007fdb3648236f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0 #1 0x00007fdb3cdc6434 in () at /usr/lib64/libQt5Script.so.5 #2 0x00007fdb3cdc6479 in () at /usr/lib64/libQt5Script.so.5 #3 0x00007fdb3647c684 in start_thread () at /lib64/libpthread.so.0 #4 0x00007fdb32d82efd in clone () at /lib64/libc.so.6 Thread 2 (Thread 0x7fda8009d700 (LWP 1812)): #0 0x00007fdb32d79083 in select () at /lib64/libc.so.6 #1 0x00007fdb342ae3ff in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5 #2 0x00007fdb342afc94 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5 #3 0x00007fdb342b0142 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #4 0x00007fdb3425e62a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #5 0x00007fdb3409895c in QThread::exec() () at /usr/lib64/libQt5Core.so.5 #6 0x00007fdb3ba41c15 in () at /usr/lib64/libQt5Qml.so.5 #7 0x00007fdb3409d509 in () at /usr/lib64/libQt5Core.so.5 #8 0x00007fdb3647c684 in start_thread () at /lib64/libpthread.so.0 #9 0x00007fdb32d82efd in clone () at /lib64/libc.so.6 Thread 1 (Thread 0x7fdb3e029800 (LWP 1548)): [KCrash Handler] #6 0x00000074006c0075 in () #7 0x00007fdb34290de0 in QObject::connect(QObject const*, char const*, QObject const*, char const*, Qt::ConnectionType) () at /usr/lib64/libQt5Core.so.5 #8 0x00007fdb3ce07b17 in () at /usr/lib64/libQt5Script.so.5 #9 0x00007fdb3ce07bdf in () at /usr/lib64/libQt5Script.so.5 #10 0x00007fdb3ce07e72 in QScriptEngine::newQObject(QObject*, QScriptEngine::ValueOwnership, QFlags<QScriptEngine::QObjectWrapOption> const&) () at /usr/lib64/libQt5Script.so.5 #11 0x00007fdb3d99e49c in () at /usr/lib64/libkwin.so.5 #12 0x00007fdb3ce08155 in () at /usr/lib64/libQt5Script.so.5 #13 0x00007fdb3ce2f2b3 in () at /usr/lib64/libQt5Script.so.5 #14 0x00007fdb3ce37915 in () at /usr/lib64/libQt5Script.so.5 #15 0x00007fdb3428aee0 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5 #16 0x00007fdb3d5e9c58 in KWin::EffectsHandler::desktopPresenceChanged(KWin::EffectWindow*, int, int) () at /usr/lib64/libkwineffects.so.8 #17 0x00007fdb3d5ea960 in () at /usr/lib64/libkwineffects.so.8 #18 0x00007fdb3428bad1 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5 #19 0x00007fdb34fb756c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #20 0x00007fdb34fbc446 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #21 0x00007fdb34260328 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #22 0x00007fdb3426210a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5 #23 0x00007fdb342b0032 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #24 0x00007fdb24ce954d in () at /usr/lib64/qt5/plugins/platforms/../../../libQt5XcbQpa.so.5 #25 0x00007fdb3425e62a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #26 0x00007fdb342666dd in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5 #27 0x00007fdb3dca1016 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so #28 0x00007fdb32c9c7d0 in __libc_start_main () at /lib64/libc.so.6 #29 0x0000000000400c59 in _start () Reported using DrKonqi
99% chance a dupe, otherwise (in case it happens once the other bug is fixed) install debug packages for a better backtrace (presented one lacks debug symbols) virtualbox is btw. not a gtk application and the problem is that something™ changes the virtual desktop. *** This bug has been marked as a duplicate of bug 363224 ***