Application: ktorrent (5.1.0)

Qt Version: 5.10.0
Frameworks Version: 5.42.0
Operating System: Linux 4.15.0-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:
Simply selected to close KTorrent, I would say this happens 50% of the time

The crash can be reproduced sometimes.

-- Backtrace:
Application: KTorrent (ktorrent), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fdd02917900 (LWP 17043))]

Thread 5 (Thread 0x7fdcc7fff700 (LWP 17777)):
#0  0x00007fdcfcac4f8b in poll () at /lib64/libc.so.6
#1  0x00007fdcf4530831 in  () at /usr/lib64/libpulse.so.0
#2  0x00007fdcf45221f0 in pa_mainloop_poll () at /usr/lib64/libpulse.so.0
#3  0x00007fdcf4522880 in pa_mainloop_iterate () at /usr/lib64/libpulse.so.0
#4  0x00007fdcf4522910 in pa_mainloop_run () at /usr/lib64/libpulse.so.0
#5  0x00007fdcf4530779 in  () at /usr/lib64/libpulse.so.0
#6  0x00007fdcf1b0e438 in  () at /usr/lib64/pulseaudio/libpulsecommon-11.1.so
#7  0x00007fdcf8790558 in start_thread () at /lib64/libpthread.so.0
#8  0x00007fdcfcacf72f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fdcab7fe700 (LWP 17424)):
#0  0x00007fdcf879682d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fdcfd731c2b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fdd0216cbf3 in  () at /usr/lib64/libKF5Torrent.so.6
#3  0x00007fdcfd7308d0 in  () at /usr/lib64/libQt5Core.so.5
#4  0x00007fdcf8790558 in start_thread () at /lib64/libpthread.so.0
#5  0x00007fdcfcacf72f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fdce37fe700 (LWP 17051)):
#0  0x00007fdcfcac4f8b in poll () at /lib64/libc.so.6
#1  0x00007fdcf60cf109 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fdcf60cf21c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fdcfd95d78b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fdcfd9046ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fdcfd72b8da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fdcfd7308d0 in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007fdcf8790558 in start_thread () at /lib64/libpthread.so.0
#8  0x00007fdcfcacf72f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fdce96b2700 (LWP 17049)):
#0  0x00007fdcfcac0a78 in read () at /lib64/libc.so.6
#1  0x00007fdcf6113420 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fdcf60cebf7 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fdcf60cf0b0 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fdcf60cf21c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fdcfd95d78b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fdcfd9046ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fdcfd72b8da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007fdcfed68bd5 in  () at /usr/lib64/libQt5DBus.so.5
#9  0x00007fdcfd7308d0 in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007fdcf8790558 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fdcfcacf72f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fdd02917900 (LWP 17043)):
[KCrash Handler]
#6  0x00007fdcfca0d0d0 in raise () at /lib64/libc.so.6
#7  0x00007fdcfca0e6b1 in abort () at /lib64/libc.so.6
#8  0x00007fdcfca50417 in __libc_message () at /lib64/libc.so.6
#9  0x00007fdcfca56b73 in malloc_printerr () at /lib64/libc.so.6
#10 0x00007fdcfca58479 in _int_free () at /lib64/libc.so.6
#11 0x00007fdcfd94d572 in  () at /usr/lib64/libQt5Core.so.5
#12 0x00007fdcfe8d4db2 in QStyledItemDelegate::initStyleOption(QStyleOptionViewItem*, QModelIndex const&) const () at /usr/lib64/libQt5Widgets.so.5
#13 0x00007fdcfe8d4209 in QStyledItemDelegate::sizeHint(QStyleOptionViewItem const&, QModelIndex const&) const () at /usr/lib64/libQt5Widgets.so.5
#14 0x0000555ec5a57c94 in  ()
#15 0x00007fdcfe91464a in QTreeView::indexRowSizeHint(QModelIndex const&) const () at /usr/lib64/libQt5Widgets.so.5
#16 0x00007fdcfe914f9e in QTreeViewPrivate::layout(int, bool, bool) () at /usr/lib64/libQt5Widgets.so.5
#17 0x00007fdcfe91ca0a in QTreeView::doItemsLayout() () at /usr/lib64/libQt5Widgets.so.5
#18 0x00007fdcfe9174a5 in QTreeViewPrivate::updateScrollBars() () at /usr/lib64/libQt5Widgets.so.5
#19 0x00007fdcfe91e438 in QTreeView::updateGeometries() () at /usr/lib64/libQt5Widgets.so.5
#20 0x00007fdcfe8b3469 in  () at /usr/lib64/libQt5Widgets.so.5
#21 0x00007fdcfd933fca in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#22 0x00007fdcfe8c8651 in QHeaderView::viewportEvent(QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#23 0x00007fdcfd905bb4 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#24 0x00007fdcfe67dee5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#25 0x00007fdcfe685204 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#26 0x00007fdcfd905ea8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#27 0x00007fdcfe6b54c2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#28 0x00007fdcfe6b54aa in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#29 0x00007fdcfe6b54aa in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#30 0x00007fdcfe6b54aa in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#31 0x00007fdcfe6b54aa in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#32 0x00007fdcfe6b54aa in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#33 0x00007fdcfe6b54aa in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#34 0x00007fdcfe6b54aa in QWidgetPrivate::hideChildren(bool) () at /usr/lib64/libQt5Widgets.so.5
#35 0x00007fdcfe6b5764 in QWidgetPrivate::hide_helper() () at /usr/lib64/libQt5Widgets.so.5
#36 0x00007fdcfe6b9fa0 in QWidget::setVisible(bool) () at /usr/lib64/libQt5Widgets.so.5
#37 0x00007fdcfe6b5a18 in QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) () at /usr/lib64/libQt5Widgets.so.5
#38 0x00007fdcfe6b6030 in QWidget::~QWidget() () at /usr/lib64/libQt5Widgets.so.5
#39 0x00007fdd012a34ed in KMainWindow::~KMainWindow() () at /usr/lib64/libKF5XmlGui.so.5
#40 0x0000555ec59e06e7 in  ()
#41 0x0000555ec59cfcf2 in  ()
#42 0x00007fdcfc9f7f4a in __libc_start_main () at /lib64/libc.so.6
#43 0x0000555ec59d06ca in _start ()

Reported using DrKonqi