Bug 387945

Application: ktorrent (5.0.1)

Qt Version: 5.6.2
Frameworks Version: 5.32.0
Operating System: Linux 4.9.56-desktop-1.mga6 x86_64
Distribution: "Mageia 6"

-- Information about the crash:
- What I was doing when the application crashed:

ktorrent crashed after pressing CTRL+Q to exit. I think it was the first time this has happened.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5935355840 (LWP 20671))]

Thread 5 (Thread 0x7f590cff9700 (LWP 26441)):
#0  0x00007f594387b00d in poll () at /lib64/libc.so.6
#1  0x00007f593b877fb1 in poll_func () at /lib64/libpulse.so.0
#2  0x00007f593b869c31 in pa_mainloop_poll () at /lib64/libpulse.so.0
#3  0x00007f593b86a26e in pa_mainloop_iterate () at /lib64/libpulse.so.0
#4  0x00007f593b86a320 in pa_mainloop_run () at /lib64/libpulse.so.0
#5  0x00007f593b877f16 in thread () at /lib64/libpulse.so.0
#6  0x00007f59367c99c8 in internal_thread_func () at /usr/lib64/pulseaudio/libpulsecommon-10.0.so
#7  0x00007f593f90e66d in start_thread () at /lib64/libpthread.so.0
#8  0x00007f5943886e4d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f58d7fff700 (LWP 20801)):
#0  0x00007f594387b00d in poll () at /lib64/libc.so.6
#1  0x00007f593536a61c in __libc_res_nsend () at /lib64/libresolv.so.2
#2  0x00007f5935368444 in __libc_res_nquery () at /lib64/libresolv.so.2
#3  0x00007f590c5f5f99 in _nss_dns_gethostbyaddr2_r () at /lib64/libnss_dns.so.2
#4  0x00007f590c5f6433 in _nss_dns_gethostbyaddr_r () at /lib64/libnss_dns.so.2
#5  0x00007f5943898c45 in gethostbyaddr_r@@GLIBC_2.2.5 () at /lib64/libc.so.6
#6  0x00007f59438a0ba3 in getnameinfo () at /lib64/libc.so.6
#7  0x00007f5948485776 in net::ReverseResolver::resolve(net::Address const&) () at /lib64/libktorrent.so.6
#8  0x00007f5948485818 in net::ReverseResolver::run() () at /lib64/libktorrent.so.6
#9  0x00007f5948485b69 in net::ReverseResolverThread::run() () at /lib64/libktorrent.so.6
#10 0x00007f5944484ff9 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#11 0x00007f593f90e66d in start_thread () at /lib64/libpthread.so.0
#12 0x00007f5943886e4d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f5922dee700 (LWP 20676)):
#0  0x00007f594387b00d in poll () at /lib64/libc.so.6
#1  0x00007f593efc2c94 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f593efc2d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f594469ae2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f594464649a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f59444803bc in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f5944484ff9 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f593f90e66d in start_thread () at /lib64/libpthread.so.0
#8  0x00007f5943886e4d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f5928dc9700 (LWP 20674)):
#0  0x00007f593efc232c in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#1  0x00007f593efc2bc3 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f593efc2d9c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f594469ae2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f594464649a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f59444803bc in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f5943009635 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007f5944484ff9 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f593f90e66d in start_thread () at /lib64/libpthread.so.0
#9  0x00007f5943886e4d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f5935355840 (LWP 20671)):
[KCrash Handler]
#6  0x00007f5943826f9e in __memcpy_sse2_unaligned () at /lib64/libc.so.6
#7  0x00007f594450de3f in QString::reallocData(unsigned int, bool) () at /lib64/libQt5Core.so.5
#8  0x00007f594450ff85 in QString::replace(QChar, QChar, Qt::CaseSensitivity) () at /lib64/libQt5Core.so.5
#9  0x00007f5945440083 in QAbstractItemDelegatePrivate::textForRole(Qt::ItemDataRole, QVariant const&, QLocale const&, int) const () at /lib64/libQt5Widgets.so.5
#10 0x00007f5945475c3b in QStyledItemDelegate::displayText(QVariant const&, QLocale const&) const () at /lib64/libQt5Widgets.so.5
#11 0x00007f594547777e in QStyledItemDelegate::initStyleOption(QStyleOptionViewItem*, QModelIndex const&) const () at /lib64/libQt5Widgets.so.5
#12 0x00007f59454768dc in QStyledItemDelegate::sizeHint(QStyleOptionViewItem const&, QModelIndex const&) const () at /lib64/libQt5Widgets.so.5
#13 0x000000000049cb44 in kt::ViewDelegate::sizeHint(QStyleOptionViewItem const&, QModelIndex const&) const ()
#14 0x00007f59454334a4 in QTreeView::indexRowSizeHint(QModelIndex const&) const () at /lib64/libQt5Widgets.so.5
#15 0x00007f5945433db3 in QTreeViewPrivate::layout(int, bool, bool) () at /lib64/libQt5Widgets.so.5
#16 0x00007f594543baad in QTreeView::doItemsLayout() () at /lib64/libQt5Widgets.so.5
#17 0x00007f5945435ad3 in QTreeViewPrivate::updateScrollBars() () at /lib64/libQt5Widgets.so.5
#18 0x00007f594543d403 in QTreeView::updateGeometries() () at /lib64/libQt5Widgets.so.5
#19 0x00007f59453fb099 in QAbstractItemView::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libQt5Widgets.so.5
#20 0x00007f5944673859 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#21 0x00007f594540dc45 in QHeaderView::viewportEvent(QEvent*) () at /lib64/libQt5Widgets.so.5
#22 0x00007f59446483c2 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#23 0x00007f59451a9ce5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#24 0x00007f59451aee76 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#25 0x00007f5944648628 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#26 0x00007f59451e77eb in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#27 0x00007f59451e77d3 in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#28 0x00007f59451e77d3 in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#29 0x00007f59451e77d3 in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#30 0x00007f59451e77d3 in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#31 0x00007f59451e77d3 in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#32 0x00007f59451e77d3 in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#33 0x00007f59451e77d3 in QWidgetPrivate::hideChildren(bool) () at /lib64/libQt5Widgets.so.5
#34 0x00007f59451e7a64 in QWidgetPrivate::hide_helper() () at /lib64/libQt5Widgets.so.5
#35 0x00007f59451ebf20 in QWidget::setVisible(bool) () at /lib64/libQt5Widgets.so.5
#36 0x00007f59451e7c48 in QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) () at /lib64/libQt5Widgets.so.5
#37 0x00007f59451e81e8 in QWidget::~QWidget() () at /lib64/libQt5Widgets.so.5
#38 0x00007f5946cfa574 in KMainWindow::~KMainWindow() () at /lib64/libKF5XmlGui.so.5
#39 0x000000000043a777 in kt::GUI::~GUI() ()
#40 0x000000000042b06a in main ()

Reported using DrKonqi