Application: ktorrent (4.0.1)
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.3
Operating System: Linux 2.6.34-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
KTorrent crashed when I removed a torrent from the list, and data too.
This torrent (archlinux iso) has many webseeds.

KTorrent told me I was already downloading this torrent, but I never downloaded it from this installation of KTorrent...

 -- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f9cde18c760 (LWP 2570))]

Thread 6 (Thread 0x7f9cd1117710 (LWP 2573)):
#0  0x00007f9cdbc69154 in pthread_mutex_lock () from /lib/libpthread.so.0
#1  0x00007f9cd619404e in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007f9cd6194f09 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#3  0x00007f9cd61955ad in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f9cdbffd886 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#5  0x00007f9cdbfd4122 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#6  0x00007f9cdbfd435c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#7  0x00007f9cdbeebbef in QThread::exec() () from /usr/lib/libQtCore.so.4
#8  0x00007f9cdbeee485 in ?? () from /usr/lib/libQtCore.so.4
#9  0x00007f9cdbc66cb0 in start_thread () from /lib/libpthread.so.0
#10 0x00007f9cda5d37ad in clone () from /lib/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f9cd0916710 (LWP 2574)):
#0  0x00007f9cda5cd0b3 in select () from /lib/libc.so.6
#1  0x00007f9cddd176a7 in dht::RPCServerThread::run() () from /usr/lib/libktorrent.so.2
#2  0x00007f9cdbeee485 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007f9cdbc66cb0 in start_thread () from /lib/libpthread.so.0
#4  0x00007f9cda5d37ad in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f9cbb954710 (LWP 3007)):
#0  0x00007f9cda5caf43 in poll () from /lib/libc.so.6
#1  0x00007f9cddcc7a2c in net::Poll::poll(int) () from /usr/lib/libktorrent.so.2
#2  0x00007f9cddcc4a88 in net::DownloadThread::waitForSocketReady() () from /usr/lib/libktorrent.so.2
#3  0x00007f9cddcc4b76 in net::DownloadThread::update() () from /usr/lib/libktorrent.so.2
#4  0x00007f9cddcc4d79 in net::NetworkThread::run() () from /usr/lib/libktorrent.so.2
#5  0x00007f9cdbeee485 in ?? () from /usr/lib/libQtCore.so.4
#6  0x00007f9cdbc66cb0 in start_thread () from /lib/libpthread.so.0
#7  0x00007f9cda5d37ad in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f9cbb153710 (LWP 3008)):
#0  0x00007f9cda5caf43 in poll () from /lib/libc.so.6
#1  0x00007f9cddcc7a2c in net::Poll::poll(int) () from /usr/lib/libktorrent.so.2
#2  0x00007f9cddcc42ea in net::UploadThread::waitForSocketsReady() () from /usr/lib/libktorrent.so.2
#3  0x00007f9cddcc43d6 in net::UploadThread::update() () from /usr/lib/libktorrent.so.2
#4  0x00007f9cddcc4d79 in net::NetworkThread::run() () from /usr/lib/libktorrent.so.2
#5  0x00007f9cdbeee485 in ?? () from /usr/lib/libQtCore.so.4
#6  0x00007f9cdbc66cb0 in start_thread () from /lib/libpthread.so.0
#7  0x00007f9cda5d37ad in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f9cb96d2710 (LWP 3013)):
#0  0x00007f9cdbc6b40c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f9cdbeeeb4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f9cddcc7612 in net::ReverseResolverThread::run() () from /usr/lib/libktorrent.so.2
#3  0x00007f9cdbeee485 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f9cdbc66cb0 in start_thread () from /lib/libpthread.so.0
#5  0x00007f9cda5d37ad in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f9cde18c760 (LWP 2570)):
[KCrash Handler]
#5  0x00007f9cdbfea7a0 in QObject::~QObject() () from /usr/lib/libQtCore.so.4
#6  0x00007f9cdd398079 in KIO::JobUiDelegate::~JobUiDelegate() () from /usr/lib/libkio.so.5
#7  0x00007f9cdc3e4b08 in KJob::~KJob() () from /usr/lib/libkdecore.so.5
#8  0x00007f9cddd28729 in bt::DeleteDataFilesJob::~DeleteDataFilesJob() () from /usr/lib/libktorrent.so.2
#9  0x00007f9cdbfe665d in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#10 0x00007f9cdb1b0854 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#11 0x00007f9cdb1b493a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#12 0x0000000000436b71 in ?? ()
#13 0x00007f9cdbfd4d3c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#14 0x00007f9cdbfd849a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#15 0x00007f9cdbffd323 in ?? () from /usr/lib/libQtCore.so.4
#16 0x00007f9cd6194b33 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#17 0x00007f9cd6195310 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#18 0x00007f9cd61955ad in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#19 0x00007f9cdbffd82f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#20 0x00007f9cdb25037e in ?? () from /usr/lib/libQtGui.so.4
#21 0x00007f9cdbfd4122 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#22 0x00007f9cdbfd435c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x00007f9cdbfd876b in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#24 0x0000000000426946 in _start ()

Reported using DrKonqi