Application: ktorrent (5.1.0)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-36-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed: I was closing KTorrent there active torrents uploading content

The crash can be reproduced every time.

-- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0d767e9800 (LWP 30109))]

Thread 5 (Thread 0x7f0d33fff700 (LWP 7300)):
#0  0x00007f0d64e5b776 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f0d64e5e6ab in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f0d64e5ea49 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#3  0x00007f0d64e5f2cf in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#4  0x00007f0d68bce0d8 in pa_mainloop_dispatch () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f0d68bce4ae in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f0d68bce530 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f0d68bdc399 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#8  0x00007f0d64e6f2a8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#9  0x00007f0d6c21b6db in start_thread (arg=0x7f0d33fff700) at pthread_create.c:463
#10 0x00007f0d7092588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f0d3192c700 (LWP 30134)):
#0  0x00007f0d6c2219f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555947b31e04) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f0d6c2219f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x555947b31db0, cond=0x555947b31dd8) at pthread_cond_wait.c:502
#2  0x00007f0d6c2219f3 in __pthread_cond_wait (cond=0x555947b31dd8, mutex=0x555947b31db0) at pthread_cond_wait.c:655
#3  0x00007f0d715e159b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f0d76031413 in  () at /usr/lib/x86_64-linux-gnu/libKF5Torrent.so.6
#5  0x00007f0d715e016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0d6c21b6db in start_thread (arg=0x7f0d3192c700) at pthread_create.c:463
#7  0x00007f0d7092588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f0d577fe700 (LWP 30113)):
#0  0x00007f0d70918bf9 in __GI___poll (fds=0x7f0d44003ce0, nfds=1, timeout=9811) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0d6a717439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0d6a71754c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0d7181790b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f0d717bc9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0d715db22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0d715e016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f0d6c21b6db in start_thread (arg=0x7f0d577fe700) at pthread_create.c:463
#8  0x00007f0d7092588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f0d5d815700 (LWP 30111)):
#0  0x00007f0d70918bf9 in __GI___poll (fds=0x7f0d50021ba0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0d6a717439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0d6a71754c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0d7181790b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f0d717bc9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0d715db22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0d72c44d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f0d715e016d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f0d6c21b6db in start_thread (arg=0x7f0d5d815700) at pthread_create.c:463
#9  0x00007f0d7092588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f0d767e9800 (LWP 30109)):
[KCrash Handler]
#6  0x00007f0d717ff3cd in QVariant::QVariant(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x0000555945b1533c in  ()
#8  0x0000555945b171ad in  ()
#9  0x00007f0d727ac05c in QStyledItemDelegate::initStyleOption(QStyleOptionViewItem*, QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f0d727ab55c in QStyledItemDelegate::sizeHint(QStyleOptionViewItem const&, QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x0000555945b1aca4 in  ()
#12 0x00007f0d727ef38a in QTreeView::indexRowSizeHint(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f0d727efd1e in QTreeViewPrivate::layout(int, bool, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f0d727f7c7e in QTreeView::doItemsLayout() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f0d727f2315 in QTreeViewPrivate::updateScrollBars() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f0d727f97e8 in QTreeView::updateGeometries() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f0d72788989 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f0d717ed5b5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f0d7279eb21 in QHeaderView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f0d717be68c in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f0d7253c805 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f0d725440f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f0d717be9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f0d7257631a in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007f0d72576302 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f0d72576302 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f0d72576302 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f0d72576302 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f0d72576302 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f0d72576302 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007f0d72576302 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007f0d725765e4 in QWidgetPrivate::hide_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f0d7257ad90 in QWidget::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f0d725768a8 in QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f0d72576ef0 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f0d7517273d in KMainWindow::~KMainWindow() () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#37 0x0000555945aa3a27 in  ()
#38 0x0000555945a93032 in  ()
#39 0x00007f0d70825b97 in __libc_start_main (main=0x555945a90d60, argc=2, argv=0x7ffe68345da8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe68345d98) at ../csu/libc-start.c:310
#40 0x0000555945a93a0a in _start ()

Reported using DrKonqi