Application: ktorrent (4.1.1)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-28-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
ktorrent started crashing after I set up eth0 to run my nfs server on my local network, while using wlan3 to access the internet. I have changed the settings to use interface wlan3, but ever since I made this change yesterday, ktorrent has been randomly crashing. It first happened when it was downloading a torrent file from a magnet link gotten off one of my feeds. Then it happened a couple of times as soon as I opened ktorrent. This one was just downloading two tv shows off an rss feed and crashed.

The crash can be reproduced some of the time.

-- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f7b1f9d6780 (LWP 3620))]

Thread 9 (Thread 0x7f7b0c093700 (LWP 3622)):
#0  0x00007f7b172fb626 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7b172fbf82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7b172fc429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7b1d220f3e in QEventDispatcherGlib::processEvents (this=0x15f2f20, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f7b1d1f4cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f7b1d1f4ef7 in QEventLoop::exec (this=0x7f7b0c092e00, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f7b1d10c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f7b1d10ed05 in QThreadPrivate::start (arg=0x15e8ff0) at thread/qthread_unix.cpp:331
#8  0x00007f7b18d10efc in start_thread (arg=0x7f7b0c093700) at pthread_create.c:304
#9  0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7f7afed9c700 (LWP 3623)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f7b01368c2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f7b01368d59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f7b18d10efc in start_thread (arg=0x7f7afed9c700) at pthread_create.c:304
#4  0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f7afe49b700 (LWP 3624)):
#0  0x00007f7b1b93de63 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f7b172fbf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7b172fc429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7b1d220f3e in QEventDispatcherGlib::processEvents (this=0x3180cb0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f7b1d1f4cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f7b1d1f4ef7 in QEventLoop::exec (this=0x7f7afe49ae00, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f7b1d10c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f7b1d10ed05 in QThreadPrivate::start (arg=0x31804f0) at thread/qthread_unix.cpp:331
#8  0x00007f7b18d10efc in start_thread (arg=0x7f7afe49b700) at pthread_create.c:304
#9  0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f7afc621700 (LWP 3652)):
#0  0x00007f7b1f4d29c2 in deref (this=0x147fccc) at /usr/include/qt4/QtCore/qatomic_x86_64.h:133
#1  deref (value=0x1483cd0, d=0x147fcc0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:332
#2  deref (this=0x7f7ab4061bb8) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:328
#3  ~ExternalRefCount (this=0x7f7ab4061bb8, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:393
#4  ~QSharedPointer (this=0x7f7ab4061bb8, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:451
#5  ~pair (this=0x7f7ab4061bb0, __in_chrg=<optimized out>) at /usr/include/c++/4.6/bits/stl_pair.h:87
#6  destroy (__p=0x7f7ab4061bb0, this=<optimized out>) at /usr/include/c++/4.6/ext/new_allocator.h:118
#7  _M_destroy_node (__p=0x7f7ab4061b90, this=<optimized out>) at /usr/include/c++/4.6/bits/stl_tree.h:394
#8  std::_Rb_tree<int, std::pair<int const, QSharedPointer<net::PollClient> >, std::_Select1st<std::pair<int const, QSharedPointer<net::PollClient> > >, std::less<int>, std::allocator<std::pair<int const, QSharedPointer<net::PollClient> > > >::_M_erase (this=0x147fc18, __x=<optimized out>) at /usr/include/c++/4.6/bits/stl_tree.h:1066
#9  0x00007f7b1f4d25e7 in clear (this=0x147fc18) at /usr/include/c++/4.6/bits/stl_tree.h:799
#10 clear (this=0x147fc18) at /usr/include/c++/4.6/bits/stl_map.h:704
#11 net::Poll::poll (this=0x147fbf0, timeout=<optimized out>) at ../../src/net/poll.cpp:113
#12 0x00007f7b1f4cf229 in net::DownloadThread::waitForSocketReady (this=0x147fbe0) at ../../src/net/downloadthread.cpp:128
#13 0x00007f7b1f4cf336 in net::DownloadThread::update (this=0x147fbe0) at ../../src/net/downloadthread.cpp:48
#14 0x00007f7b1f4cf549 in net::NetworkThread::run (this=0x147fbe0) at ../../src/net/networkthread.cpp:48
#15 0x00007f7b1d10ed05 in QThreadPrivate::start (arg=0x147fbe0) at thread/qthread_unix.cpp:331
#16 0x00007f7b18d10efc in start_thread (arg=0x7f7afc621700) at pthread_create.c:304
#17 0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#18 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f7afd623700 (LWP 3653)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:216
#1  0x00007f7b1d10dfe8 in thread_sleep (ti=0x7f7afd622dc0) at thread/qthread_unix.cpp:493
#2  0x00007f7b1d10e420 in QThread::msleep (msecs=<optimized out>) at thread/qthread_unix.cpp:519
#3  0x00007f7b1f4cee18 in update (this=0x147d110) at ../../src/net/uploadthread.cpp:89
#4  net::UploadThread::update (this=0x147d110) at ../../src/net/uploadthread.cpp:43
#5  0x00007f7b1f4cf549 in net::NetworkThread::run (this=0x147d110) at ../../src/net/networkthread.cpp:48
#6  0x00007f7b1d10ed05 in QThreadPrivate::start (arg=0x147d110) at thread/qthread_unix.cpp:331
#7  0x00007f7b18d10efc in start_thread (arg=0x7f7afd623700) at pthread_create.c:304
#8  0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f7aba10b700 (LWP 3678)):
#0  0x00007f7b1d220f37 in QEventDispatcherGlib::processEvents (this=0x32c06f0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#1  0x00007f7b1d1f4cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#2  0x00007f7b1d1f4ef7 in QEventLoop::exec (this=0x7f7aba10add0, flags=...) at kernel/qeventloop.cpp:201
#3  0x00007f7b1d10c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#4  0x00007f7b1d1d7cbf in QInotifyFileSystemWatcherEngine::run (this=0x29e83b0) at io/qfilesystemwatcher_inotify.cpp:248
#5  0x00007f7b1d10ed05 in QThreadPrivate::start (arg=0x29e83b0) at thread/qthread_unix.cpp:331
#6  0x00007f7b18d10efc in start_thread (arg=0x7f7aba10b700) at pthread_create.c:304
#7  0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f7ab990a700 (LWP 3680)):
#0  0x00007f7b18d141fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x31a51b8) at pthread_mutex_unlock.c:290
#2  0x00007f7b172fa687 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7b172fbd81 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7b172fc429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7b1d220f3e in QEventDispatcherGlib::processEvents (this=0x3a9e110, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f7b1d1f4cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f7b1d1f4ef7 in QEventLoop::exec (this=0x7f7ab9909dd0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007f7b1d10c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007f7b1d1d7cbf in QInotifyFileSystemWatcherEngine::run (this=0x3aa3ad0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f7b1d10ed05 in QThreadPrivate::start (arg=0x3aa3ad0) at thread/qthread_unix.cpp:331
#11 0x00007f7b18d10efc in start_thread (arg=0x7f7ab990a700) at pthread_create.c:304
#12 0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f7afbe20700 (LWP 3748)):
#0  __libc_enable_asynccancel () at ../nptl/sysdeps/unix/sysv/linux/x86_64/cancellation.S:66
#1  0x00007f7b1b93de48 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:85
#2  0x00007f7b1f4d258a in net::Poll::poll (this=0x7f7afbe1fcd0, timeout=<optimized out>) at ../../src/net/poll.cpp:99
#3  0x00007f7b1f534c8b in dht::RPCServer::Private::run (this=0x15be380) at ../../src/dht/rpcserver.cpp:95
#4  0x00007f7b1d10ed05 in QThreadPrivate::start (arg=0x15be380) at thread/qthread_unix.cpp:331
#5  0x00007f7b18d10efc in start_thread (arg=0x7f7afbe20700) at pthread_create.c:304
#6  0x00007f7b1b949f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7b1f9d6780 (LWP 3620)):
[KCrash Handler]
#6  bt::PieceData::write (this=0x0, buf=0x7f7ab4053768 "", buf_size=2896, off=0) at ../../src/diskio/piecedata.cpp:61
#7  0x00007f7b1f4f27a7 in bt::WebSeed::handleData (this=0x1e413d0, tmp=...) at ../../src/download/webseed.cpp:426
#8  0x00007f7b1f4f2a02 in bt::WebSeed::readData (this=0x1e413d0) at ../../src/download/webseed.cpp:397
#9  0x00007f7b1f4f3f75 in bt::WebSeed::update (this=0x1e413d0) at ../../src/download/webseed.cpp:353
#10 0x00007f7b1f4fd3e7 in bt::Downloader::update (this=0x1df6f30) at ../../src/download/downloader.cpp:204
#11 0x00007f7b1f5193a9 in bt::TorrentControl::update (this=0x1b22f30) at ../../src/torrent/torrentcontrol.cpp:175
#12 0x000000000042b9bd in kt::Core::update (this=0x15fa610) at ../../ktorrent/core.cpp:1052
#13 0x000000000043304d in kt::Core::qt_metacall (this=0x15fa610, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0x7fff2104e040) at ./core.moc:164
#14 0x00007f7b1d208eba in QMetaObject::activate (sender=0x15fa638, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3278
#15 0x00007f7b1d20c789 in QObject::event (this=0x15fa638, e=<optimized out>) at kernel/qobject.cpp:1181
#16 0x00007f7b1c5a5474 in notify_helper (e=0x7fff2104e580, receiver=0x15fa638, this=0x14b98d0) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x14b98d0, receiver=0x15fa638, e=0x7fff2104e580) at kernel/qapplication.cpp:4458
#18 0x00007f7b1c5aa2e1 in QApplication::notify (this=0x7fff2104e880, receiver=0x15fa638, e=0x7fff2104e580) at kernel/qapplication.cpp:4365
#19 0x0000000000439921 in kt::App::notify (this=<optimized out>, receiver=<optimized out>, event=<optimized out>) at ../../ktorrent/app.cpp:99
#20 0x00007f7b1d1f5afc in QCoreApplication::notifyInternal (this=0x7fff2104e880, receiver=0x15fa638, event=0x7fff2104e580) at kernel/qcoreapplication.cpp:787
#21 0x00007f7b1d222d62 in sendEvent (event=0x7fff2104e580, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x14bf3c0) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007f7b1d220538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#25 0x00007f7b172fba5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f7b172fc258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f7b172fc429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f7b1d220ed6 in QEventDispatcherGlib::processEvents (this=0x1442fa0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007f7b1c64d10e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f7b1d1f4cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f7b1d1f4ef7 in QEventLoop::exec (this=0x7fff2104e810, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007f7b1d1f9789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0x0000000000428362 in main (argc=5, argv=0x7fff2104f6f8) at ../../ktorrent/main.cpp:177

Possible duplicates by query: bug 305533, bug 302249, bug 289585.

Reported using DrKonqi