Bug 392831

Application: ktorrent (5.1.0)

Qt Version: 5.9.1
Frameworks Version: 5.44.0
Operating System: Linux 4.13.0-38-generic x86_64
Distribution: Ubuntu 17.10

-- Information about the crash:
- What I was doing when the application crashed:
Regular usage, ktorrent was open, window visible, with a bunch of active uploads. When I quit the app it crashes (menu option or ctrl+q)

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 0x7fc3b06ad900 (LWP 14560))]

Thread 5 (Thread 0x7fc3755f3700 (LWP 14820)):
#0  0x00007fc3aa839951 in __GI___poll (fds=0x7fc3640025d0, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc3a2b73451 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fc3a2b64e10 in pa_mainloop_poll () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fc3a2b654a0 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fc3a2b65530 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fc3a2b73399 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fc39d961ed8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-10.0.so
#7  0x00007fc3a613b7fc in start_thread (arg=0x7fc3755f3700) at pthread_create.c:465
#8  0x00007fc3aa845b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc339a63700 (LWP 14622)):
#0  0x00007fc3a6142072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559ec9198360) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc3a6142072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x559ec9198310, cond=0x559ec9198338) at pthread_cond_wait.c:502
#2  0x00007fc3a6142072 in __pthread_cond_wait (cond=0x559ec9198338, mutex=0x559ec9198310) at pthread_cond_wait.c:655
#3  0x00007fc3ab4b16cb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc3afef9413 in  () at /usr/lib/x86_64-linux-gnu/libKF5Torrent.so.6
#5  0x00007fc3ab4b029d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc3a613b7fc in start_thread (arg=0x7fc339a63700) at pthread_create.c:465
#7  0x00007fc3aa845b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc391103700 (LWP 14564)):
#0  0x00007fc3a4699160 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fc3a469b630 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc3a469c09b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc3a469c27c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc3ab6e649b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc3ab68be3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc3ab4ab3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc3ab4b029d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc3a613b7fc in start_thread (arg=0x7fc391103700) at pthread_create.c:465
#9  0x00007fc3aa845b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc392b15700 (LWP 14562)):
#0  0x00007fc3aa83506d in __GI___libc_read (fd=11, buf=0x7fc392b14a60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fc3a46e0280 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc3a469bc4b in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc3a469c110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc3a469c27c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc3ab6e649b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc3ab68be3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc3ab4ab3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc3acb0de45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fc3ab4b029d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc3a613b7fc in start_thread (arg=0x7fc392b15700) at pthread_create.c:465
#11 0x00007fc3aa845b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc3b06ad900 (LWP 14560)):
[KCrash Handler]
#6  0x00007fc3ab52ec43 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc3ab534067 in QString::replace(QChar, QChar, Qt::CaseSensitivity) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc3ac69bacd in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007fc3ac6cb98f in QStyledItemDelegate::displayText(QVariant const&, QLocale const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007fc3ac6cd5ce in QStyledItemDelegate::initStyleOption(QStyleOptionViewItem*, QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007fc3ac6cc6bc in QStyledItemDelegate::sizeHint(QStyleOptionViewItem const&, QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x0000559ec59d0ca4 in  ()
#13 0x00007fc3ac68eb8a in QTreeView::indexRowSizeHint(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007fc3ac68f4fe in QTreeViewPrivate::layout(int, bool, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fc3ac6974be in QTreeView::doItemsLayout() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fc3ac691cc5 in QTreeViewPrivate::updateScrollBars() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fc3ac699008 in QTreeView::updateGeometries() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007fc3ac652ae9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fc3ab6bc8e5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fc3ac6685f1 in QHeaderView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fc3ab68dacc in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fc3ac408445 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fc3ac40fd34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007fc3ab68dde8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fc3ac4440fa in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fc3ac4440e2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fc3ac4440e2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fc3ac4440e2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fc3ac4440e2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007fc3ac4440e2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007fc3ac4440e2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007fc3ac4440e2 in QWidgetPrivate::hideChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007fc3ac4443c4 in QWidgetPrivate::hide_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007fc3ac448b20 in QWidget::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007fc3ac444688 in QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007fc3ac444cd0 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007fc3af03a73d in KMainWindow::~KMainWindow() () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#38 0x0000559ec5959a27 in  ()
#39 0x0000559ec5949032 in  ()
#40 0x00007fc3aa7521c1 in __libc_start_main (main=0x559ec5946d60, argc=1, argv=0x7fffd53460f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd53460e8) at ../csu/libc-start.c:308
#41 0x0000559ec5949a0a in _start ()

Reported using DrKonqi