Bug 398145

Application: ktorrent (5.1.0)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-32-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
The crash was reported after I closed the KTorrent application using the File -> Quit menu action

- Unusual behavior I noticed:
None. System operating normally.

- Custom settings of the application:
Customised downloaded file path

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 0x7f196a39f800 (LWP 4065))]

Thread 5 (Thread 0x7f18fb7fe700 (LWP 4082)):
#0  0x00007f195fdde9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5645c80ddb64) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f195fdde9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5645c80ddb10, cond=0x5645c80ddb38) at pthread_cond_wait.c:502
#2  0x00007f195fdde9f3 in __pthread_cond_wait (cond=0x5645c80ddb38, mutex=0x5645c80ddb10) at pthread_cond_wait.c:655
#3  0x00007f19651a359b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1969bf3413 in  () at /usr/lib/x86_64-linux-gnu/libKF5Torrent.so.6
#5  0x00007f19651a216d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f195fdd86db in start_thread (arg=0x7f18fb7fe700) at pthread_create.c:463
#7  0x00007f19644e288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f192694c700 (LWP 4079)):
#0  0x00007f1958a1bd25 in pa_queue_pop () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f1958a1a776 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f1958a1b728 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#3  0x00007f1958a1ba49 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#4  0x00007f1958a1c2cf in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#5  0x00007f195c78b0d8 in pa_mainloop_dispatch () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f195c78b4ae in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f195c78b530 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#8  0x00007f195c799399 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#9  0x00007f1958a2c2a8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#10 0x00007f195fdd86db in start_thread (arg=0x7f192694c700) at pthread_create.c:463
#11 0x00007f19644e288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f194b7fe700 (LWP 4069)):
#0  0x00007f19644d5bf9 in __GI___poll (fds=0x7f1938003ce0, nfds=1, timeout=9775) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f195e2d4439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f195e2d454c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19653d990b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f196537e9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f196519d22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f19651a216d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f195fdd86db in start_thread (arg=0x7f194b7fe700) at pthread_create.c:463
#8  0x00007f19644e288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f1951503700 (LWP 4067)):
#0  0x00007f19653d8028 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f19653d967e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f195e2d3998 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f195e2d436b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f195e2d454c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f19653d990b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f196537e9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f196519d22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1966806d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f19651a216d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f195fdd86db in start_thread (arg=0x7f1951503700) at pthread_create.c:463
#11 0x00007f19644e288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f196a39f800 (LWP 4065)):
[KCrash Handler]
#6  0x00007f1965217e33 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f196521d257 in QString::replace(QChar, QChar, Qt::CaseSensitivity) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f19663653fd in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007f196636c82f in QStyledItemDelegate::displayText(QVariant const&, QLocale const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f196636e46e in QStyledItemDelegate::initStyleOption(QStyleOptionViewItem*, QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f196636d55c in QStyledItemDelegate::sizeHint(QStyleOptionViewItem const&, QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f19663b138a in QTreeView::indexRowSizeHint(QModelIndex const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f19663b1d1e in QTreeViewPrivate::layout(int, bool, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f19663b9c7e in QTreeView::doItemsLayout() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f19663b4315 in QTreeViewPrivate::updateScrollBars() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f19663bb7e8 in QTreeView::updateGeometries() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f196613dbe2 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f19661de4be in QFrame::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f1966351b3b in QAbstractItemView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f19663ba4dc in QTreeView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f196538068c in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f19660fe805 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f19661060f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f19653809a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f19661360eb in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f1966139ec3 in QWidgetPrivate::show_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f196613cbdb in QWidget::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f1966139e30 in QWidgetPrivate::showChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f1966139edf in QWidgetPrivate::show_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f196613cbdb in QWidget::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007f1966139e30 in QWidgetPrivate::showChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007f1966139edf in QWidgetPrivate::show_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f1966139dde in QWidgetPrivate::showChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f1966139edf in QWidgetPrivate::show_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f196613cbdb in QWidget::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f1969fa462d in kt::TabBarWidget::unshrink() () at /usr/lib/x86_64-linux-gnu/libktcore.so.16
#37 0x00007f19653af6cf in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f1969fae27f in  () at /usr/lib/x86_64-linux-gnu/libktcore.so.16
#39 0x00007f19653af6cf in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007f19660f81a2 in QAction::toggled(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007f19660fa6fc in QAction::setChecked(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007f193799a368 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/ktorrent/ktorrent_infowidget.so
#43 0x00007f1969fa5f36 in kt::PluginManager::unloadAll() () at /usr/lib/x86_64-linux-gnu/libktcore.so.16
#44 0x00005645c639bfed in  ()
#45 0x00007f19653af6cf in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007f196537f1c7 in QCoreApplication::aboutToQuit(QCoreApplication::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f19653836db in QCoreApplicationPrivate::execCleanup() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007f1965387a9d in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00005645c639902a in  ()
#50 0x00007f19643e2b97 in __libc_start_main (main=0x5645c6396d60, argc=1, argv=0x7ffdd1a62988, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdd1a62978) at ../csu/libc-start.c:310
#51 0x00005645c6399a0a in _start ()

Reported using DrKonqi