Application that crashed: ktorrent
Version of the application: 4.0beta2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
The machine has crashed multiple times in the past day. The common thread initially seemed to be a lack of Internet connection (I was switching the cable to my laptop periodically because the wi-fi wasn't sufficient) but eventually it started crashing without that. The only common factor I can think of is that it was always when the window didn't have focus.

 -- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77e2700 (LWP 10351))]

Thread 3 (Thread 0xb58ffb70 (LWP 10353)):
#0  0x00b49422 in __kernel_vsyscall ()
#1  0x00c0fa71 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0x00a29eea in dht::RPCServerThread::run (this=0x83aa8d0) at /tmp/ktorrent-4.0beta2/libbtcore/dht/rpcserver.cpp:107
#3  0x04b07e32 in QThreadPrivate::start (arg=0x83aa8d0) at thread/qthread_unix.cpp:188
#4  0x00b2780e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0x00c168de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xb2ee6b70 (LWP 10363)):
#0  0x00b49422 in __kernel_vsyscall ()
#1  0x00b2be15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x00c2387d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x04b08e67 in QWaitConditionPrivate::wait (this=0xb48bfac8, mutex=0xb48bfac4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0xb48bfac8, mutex=0xb48bfac4, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x007bb922 in QHostInfoAgent::run (this=0xb48bfab8) at kernel/qhostinfo.cpp:260
#6  0x04b07e32 in QThreadPrivate::start (arg=0xb48bfab8) at thread/qthread_unix.cpp:188
#7  0x00b2780e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x00c168de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb77e2700 (LWP 10351)):
[KCrash Handler]
#6  QCoreApplication::postEvent (receiver=0xb25625c8, event=0xb3f79cd0, priority=0) at kernel/qcoreapplication.cpp:1012
#7  0x04bf863c in QCoreApplication::postEvent (receiver=0xb25625c8, event=0xb3f79cd0) at kernel/qcoreapplication.cpp:973
#8  0x04c07ab4 in QObject::deleteLater (this=0xb25625c8) at kernel/qobject.cpp:2019
#9  0x009d63c5 in bt::PeerManager::stop (this=0x8856510) at /tmp/ktorrent-4.0beta2/libbtcore/peer/peermanager.cpp:545
#10 0x00a0efd6 in bt::TorrentControl::stop (this=0x88131a0, wjob=0x0) at /tmp/ktorrent-4.0beta2/libbtcore/torrent/torrentcontrol.cpp:487
#11 0x005bfd4c in kt::QueueManager::stopSafely (this=0xb5902770, tc=0x88131a0, wjob=0x0) at /tmp/ktorrent-4.0beta2/libktcore/torrent/queuemanager.cpp:738
#12 0x005c2994 in kt::QueueManager::orderQueue (this=0xb5902770) at /tmp/ktorrent-4.0beta2/libktcore/torrent/queuemanager.cpp:589
#13 0x005c3079 in kt::QueueManager::checkStalledTorrents (this=0xb5902770, now=1271138662549, min_stall_time=15) at /tmp/ktorrent-4.0beta2/libktcore/torrent/queuemanager.cpp:805
#14 0x0806b2c4 in kt::Core::update (this=0xb5902678) at /tmp/ktorrent-4.0beta2/ktorrent/core.cpp:1038
#15 0x080739fd in kt::Core::qt_metacall (this=0xb5902678, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbff4bc6c) at /tmp/ktorrent-4.0beta2/build/ktorrent/core.moc:161
#16 0x04c0e263 in QMetaObject::activate (sender=0xb590268c, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#17 0x04c0eec2 in QMetaObject::activate (sender=0xb590268c, m=0x4ce9904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#18 0x04c48667 in QTimer::timeout (this=0xb590268c) at .moc/release-shared/moc_qtimer.cpp:128
#19 0x04c139ae in QTimer::timerEvent (this=0xb590268c, e=0xbff4c100) at kernel/qtimer.cpp:261
#20 0x04c083bf in QObject::event (this=0xb590268c, e=0xbff4c100) at kernel/qobject.cpp:1075
#21 0x057aff54 in QApplicationPrivate::notify_helper (this=0x819f9b0, receiver=0xb590268c, e=0xbff4c100) at kernel/qapplication.cpp:4056
#22 0x057b767c in QApplication::notify (this=0xbff4c454, receiver=0xb590268c, e=0xbff4c100) at kernel/qapplication.cpp:3603
#23 0x010d7bfa in KApplication::notify (this=0xbff4c454, receiver=0xb590268c, event=0xbff4c100) at ../../kdeui/kernel/kapplication.cpp:302
#24 0x04bf86cb in QCoreApplication::notifyInternal (this=0xbff4c454, receiver=0xb590268c, event=0xbff4c100) at kernel/qcoreapplication.cpp:610
#25 0x04c257ce in QCoreApplication::sendEvent (this=0x8197a34) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#26 QTimerInfoList::activateTimers (this=0x8197a34) at kernel/qeventdispatcher_unix.cpp:572
#27 0x04c230e0 in timerSourceDispatch (source=0x8197a00) at kernel/qeventdispatcher_glib.cpp:165
#28 0x012cfe88 in g_main_dispatch (context=0x8196e90) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#29 IA__g_main_context_dispatch (context=0x8196e90) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#30 0x012d3730 in g_main_context_iterate (context=0x8196e90, block=<value optimized out>, dispatch=1, self=0x8195d68) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#31 0x012d3863 in IA__g_main_context_iteration (context=0x8196e90, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#32 0x04c2302c in QEventDispatcherGlib::processEvents (this=0x8171ee8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#33 0x05850be5 in QGuiEventDispatcherGlib::processEvents (this=0x8171ee8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x04bf6c79 in QEventLoop::processEvents (this=0xbff4c3c4, flags=) at kernel/qeventloop.cpp:149
#35 0x04bf70ca in QEventLoop::exec (this=0xbff4c3c4, flags=...) at kernel/qeventloop.cpp:201
#36 0x04bf953f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x057afdd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#38 0x08068d91 in main (argc=1, argv=0xbff4c854) at /tmp/ktorrent-4.0beta2/ktorrent/main.cpp:173

This bug may be a duplicate of or related to bug 234231

Reported using DrKonqi