Application: kate (15.08.1)

Qt Version: 5.5.1
Operating System: Linux 4.2.7-300.fc23.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
Once kate crashed when I tried to save a minor change to a file, another time it crashed when I tried to save a file, another time it crashed when I tried to open a file. This instability has suddenly appeared after upgrading to Plasma 5.5.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kate (kate), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0412ebe900 (LWP 9458))]

Thread 2 (Thread 0x7f03f3bcd700 (LWP 9459)):
#0  0x00007f040b7c3ffd in poll () from /lib64/libc.so.6
#1  0x00007f04086d8272 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f04086d9ee7 in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f03f6599da9 in QXcbEventReader::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007f040c3cc3ce in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f040998860a in start_thread () from /lib64/libpthread.so.0
#6  0x00007f040b7cfa9d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f0412ebe900 (LWP 9458)):
[KCrash Handler]
#5  0x00007f03f65b0f08 in QXcbWindow::setParent(QPlatformWindow const*) () from /lib64/libQt5XcbQpa.so.5
#6  0x00007f040d44a8bb in QWindow::setParent(QWindow*) () from /lib64/libQt5Gui.so.5
#7  0x00007f040dc255d5 in QWidgetPrivate::setParent_sys(QWidget*, QFlags<Qt::WindowType>) () from /lib64/libQt5Widgets.so.5
#8  0x00007f040dc30fda in QWidget::setParent(QWidget*, QFlags<Qt::WindowType>) () from /lib64/libQt5Widgets.so.5
#9  0x00007f040dc320cc in QWidget::setParent(QWidget*) () from /lib64/libQt5Widgets.so.5
#10 0x00007f040dd1811c in QDialogButtonBox::addButton(QAbstractButton*, QDialogButtonBox::ButtonRole) () from /lib64/libQt5Widgets.so.5
#11 0x00007f03f2d9de59 in KDEPlatformFileDialog::KDEPlatformFileDialog() () from /usr/lib64/qt5/plugins/platformthemes/KDEPlatformTheme.so
#12 0x00007f03f2d9e282 in KDEPlatformFileDialogHelper::KDEPlatformFileDialogHelper() () from /usr/lib64/qt5/plugins/platformthemes/KDEPlatformTheme.so
#13 0x00007f03f2d912fa in KdePlatformTheme::createPlatformDialogHelper(QPlatformTheme::DialogType) const () from /usr/lib64/qt5/plugins/platformthemes/KDEPlatformTheme.so
#14 0x00007f040dde71b5 in QDialogPrivate::platformHelper() const () from /lib64/libQt5Widgets.so.5
#15 0x00007f040ddfa958 in QFileDialogPrivate::init(QUrl const&, QString const&, QString const&) () from /lib64/libQt5Widgets.so.5
#16 0x00007f040ddfac76 in QFileDialog::QFileDialog(QFileDialogArgs const&) () from /lib64/libQt5Widgets.so.5
#17 0x00007f040ddfb22e in QFileDialog::getOpenFileUrls(QWidget*, QString const&, QUrl const&, QString const&, QString*, QFlags<QFileDialog::Option>, QStringList const&) () from /lib64/libQt5Widgets.so.5
#18 0x00007f0412b45918 in KateViewManager::slotDocumentOpen() () from /lib64/libkdeinit5_kate.so
#19 0x00007f0412b7f695 in KateViewManager::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libkdeinit5_kate.so
#20 0x00007f040c5dc2ea in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#21 0x00007f040dbe37d2 in QAction::triggered(bool) () from /lib64/libQt5Widgets.so.5
#22 0x00007f040dbe5c58 in QAction::activate(QAction::ActionEvent) () from /lib64/libQt5Widgets.so.5
#23 0x00007f040dd68562 in QMenuPrivate::activateCausedStack(QList<QPointer<QWidget> > const&, QAction*, QAction::ActionEvent, bool) () from /lib64/libQt5Widgets.so.5
#24 0x00007f040dd6e82c in QMenuPrivate::activateAction(QAction*, QAction::ActionEvent, bool) () from /lib64/libQt5Widgets.so.5
#25 0x00007f040dd72730 in QMenu::mouseReleaseEvent(QMouseEvent*) () from /lib64/libQt5Widgets.so.5
#26 0x00007f040dc30428 in QWidget::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#27 0x00007f040dd73173 in QMenu::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#28 0x00007f040dbed41c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#29 0x00007f040dbf2fe9 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#30 0x00007f040c5ad77b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#31 0x00007f040dd71f19 in QMenuPrivate::mouseEventTaken(QMouseEvent*) () from /lib64/libQt5Widgets.so.5
#32 0x00007f040dd725b6 in QMenu::mouseReleaseEvent(QMouseEvent*) () from /lib64/libQt5Widgets.so.5
#33 0x00007f040dc30428 in QWidget::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#34 0x00007f040dd73173 in QMenu::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#35 0x00007f040dbed41c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#36 0x00007f040dbf2fe9 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#37 0x00007f040c5ad77b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#38 0x00007f040dbf1ef2 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /lib64/libQt5Widgets.so.5
#39 0x00007f040dc4aced in QWidgetWindow::handleMouseEvent(QMouseEvent*) () from /lib64/libQt5Widgets.so.5
#40 0x00007f040dc4cf4b in QWidgetWindow::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#41 0x00007f040dbed41c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#42 0x00007f040dbf28e6 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#43 0x00007f040c5ad77b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#44 0x00007f040d443ee1 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib64/libQt5Gui.so.5
#45 0x00007f040d445bb5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /lib64/libQt5Gui.so.5
#46 0x00007f040d429958 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Gui.so.5
#47 0x00007f03f65cb0a0 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5XcbQpa.so.5
#48 0x00007f0407b78e3a in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#49 0x00007f0407b791d0 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#50 0x00007f0407b7927c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#51 0x00007f040c603eef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#52 0x00007f040c5aaf0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#53 0x00007f040c5b2fec in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#54 0x00007f0412b788d4 in kdemain () from /lib64/libkdeinit5_kate.so
#55 0x00007f040b6ed580 in __libc_start_main () from /lib64/libc.so.6
#56 0x000055b76e259b49 in _start ()

Reported using DrKonqi