https://bugs.kde.org/show_bug.cgi?id=370251
--- Comment #1 from András Manţia <aman...@kde.org> --- The backtrace is not always the same, but always crashes: Thread 1 (Thread 0x7f58d6bd8800 (LWP 5054)): [KCrash Handler] #6 0x00007f58d37f40c7 in raise () at /lib64/libc.so.6 #7 0x00007f58d37f5478 in abort () at /lib64/libc.so.6 #8 0x00007f58d3831784 in () at /lib64/libc.so.6 #9 0x00007f58d3837026 in malloc_printerr () at /lib64/libc.so.6 #10 0x00007f58d38372e2 in malloc_consolidate () at /lib64/libc.so.6 #11 0x00007f58d3838d9d in _int_malloc () at /lib64/libc.so.6 #12 0x00007f58d383a95c in malloc () at /lib64/libc.so.6 #13 0x00007f58c276b4c0 in () at /usr/lib64/tls/libnvidia-tls.so.367.44 #14 0x00007f58d3e13328 in operator new(unsigned long) () at /usr/lib64/libstdc++.so.6 #15 0x00007f58d3e133c9 in operator new[](unsigned long) () at /usr/lib64/libstdc++.so.6 #16 0x00007f57e769537a in () at /usr/lib64/qt5/plugins/akregator_mk4storage_plugin.so #17 0x00007f57e769ca0d in () at /usr/lib64/qt5/plugins/akregator_mk4storage_plugin.so #18 0x00007f57e769d472 in () at /usr/lib64/qt5/plugins/akregator_mk4storage_plugin.so #19 0x00007f57e76aa5af in () at /usr/lib64/qt5/plugins/akregator_mk4storage_plugin.so #20 0x00007f57e76ab518 in () at /usr/lib64/qt5/plugins/akregator_mk4storage_plugin.so #21 0x00007f57e76b177f in () at /usr/lib64/qt5/plugins/akregator_mk4storage_plugin.so #22 0x00007f57e7dd1ba1 in Akregator::Folder::updateUnreadCount() const () at /usr/lib64/libakregatorprivate.so.5 #23 0x00007f57e7dd1d39 in Akregator::Folder::slotChildChanged(Akregator::TreeNode*) () at /usr/lib64/libakregatorprivate.so.5 #24 0x00007f58d4391cfc in QMetaObject::activate(QObject*, int, int, void**) (a=0x7fff3cfd3340, r=0x1dae2c0, this=0x26c7210) at ../../src/corelib/kernel/qobject_impl.h:130 #25 0x00007f58d4391cfc in QMetaObject::activate(QObject*, int, int, void**) (sender=0x26c6d50, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff3cfd3340) at kernel/qobject.cpp:3723 #26 0x00007f57e7dd8ac2 in Akregator::TreeNode::signalChanged(Akregator::TreeNode*) () at /usr/lib64/libakregatorprivate.so.5 #27 0x00007f57e7dd2382 in Akregator::Folder::removeChild(Akregator::TreeNode*) () at /usr/lib64/libakregatorprivate.so.5 #28 0x00007f57e7dcc8a5 in Akregator::TreeNode::emitSignalDestroyed() () at /usr/lib64/libakregatorprivate.so.5 #29 0x00007f57e7dc2892 in Akregator::Feed::~Feed() () at /usr/lib64/libakregatorprivate.so.5 #30 0x00007f57e7dc2b29 in Akregator::Feed::~Feed() () at /usr/lib64/libakregatorprivate.so.5 #31 0x00007f57e7dd0b8f in Akregator::Folder::FolderPrivate::~FolderPrivate() () at /usr/lib64/libakregatorprivate.so.5 #32 0x00007f57e7dd0c38 in Akregator::Folder::~Folder() () at /usr/lib64/libakregatorprivate.so.5 #33 0x00007f57e7dd0c69 in Akregator::Folder::~Folder() () at /usr/lib64/libakregatorprivate.so.5 #34 0x00007f57e7dd0b8f in Akregator::Folder::FolderPrivate::~FolderPrivate() () at /usr/lib64/libakregatorprivate.so.5 #35 0x00007f57e7dd0c38 in Akregator::Folder::~Folder() () at /usr/lib64/libakregatorprivate.so.5 #36 0x00007f57e7dd0c69 in Akregator::Folder::~Folder() () at /usr/lib64/libakregatorprivate.so.5 #37 0x00007f57e7dc8691 in Akregator::FeedList::setRootNode(Akregator::Folder*) () at /usr/lib64/libakregatorprivate.so.5 #38 0x00007f57e7dc8b89 in Akregator::FeedList::~FeedList() () at /usr/lib64/libakregatorprivate.so.5 #39 0x00007f57e7dc8c49 in Akregator::FeedList::~FeedList() () at /usr/lib64/libakregatorprivate.so.5 #40 0x00007f57fc4202b6 in Akregator::MainWidget::setFeedList(QSharedPointer<Akregator::FeedList> const&) () at /usr/lib64/qt5/plugins/akregatorpart.so #41 0x00007f57fc42038d in Akregator::MainWidget::slotOnShutdown() () at /usr/lib64/qt5/plugins/akregatorpart.so #42 0x00007f57fc416678 in () at /usr/lib64/qt5/plugins/akregatorpart.so #43 0x00007f57fc416e18 in () at /usr/lib64/qt5/plugins/akregatorpart.so #44 0x00007f57fc416e59 in () at /usr/lib64/qt5/plugins/akregatorpart.so #45 0x00007f58d63db2ce in KontactInterface::Plugin::~Plugin() () at /usr/lib64/libKF5KontactInterface.so.5 #46 0x00007f5858871006 in () at /usr/lib64/qt5/plugins/kontact_akregatorplugin.so #47 0x00007f5858871029 in () at /usr/lib64/qt5/plugins/kontact_akregatorplugin.so #48 0x00007f58d660834e in Kontact::MainWindow::~MainWindow() (this=this@entry=0xd021e0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /usr/src/debug/kdepim-16.04.3/kontact/src/mainwindow.cpp:305 #49 0x00007f58d6608529 in Kontact::MainWindow::~MainWindow() (this=0xd021e0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /usr/src/debug/kdepim-16.04.3/kontact/src/mainwindow.cpp:307 #50 0x00007f58d4392e10 in QObject::event(QEvent*) (this=0xd021e0, e=<optimized out>) at kernel/qobject.cpp:1254 #51 0x00007f58d52b3deb in QWidget::event(QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #52 0x00007f58d53a9b2b in QMainWindow::event(QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #53 0x00007f58d614b337 in KMainWindow::event(QEvent*) () at /usr/lib64/libKF5XmlGui.so.5 #54 0x00007f58d6187245 in KXmlGuiWindow::event(QEvent*) () at /usr/lib64/libKF5XmlGui.so.5 #55 0x00007f58d5270a9c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #56 0x00007f58d5277a20 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #57 0x00007f58d43695c5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0xd021e0, event=event@entry=0x28b37b0) at kernel/qcoreapplication.cpp:988 #58 0x00007f58d436b623 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x28b37b0, receiver=<optimized out>) at kernel/qcoreapplication.h:231 #59 0x00007f58d436b623 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xc0ebc0) at kernel/qcoreapplication.cpp:1649 #60 0x00007f58d436bb68 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503 #61 0x00007f58d43b86e3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0xc66420) at kernel/qeventdispatcher_glib.cpp:276 #62 0x00007f58cae36c84 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0 #63 0x00007f58cae36ed8 in () at /usr/lib64/libglib-2.0.so.0 #64 0x00007f58cae36f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #65 0x00007f58d43b7f2c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xc77a30, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #66 0x00007f58d436789b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff3cfd4000, flags=..., flags@entry=...) at kernel/qeventloop.cpp:210 #67 0x00007f58d436f696 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1261 #68 0x0000000000404771 in main(int, char**) (argc=1, argv=0x7fff3cfd43e8) at /usr/src/debug/kdepim-16.04.3/kontact/src/main.cpp:223 -- You 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