Application: ktorrent (4.0.2)
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.3
Operating System: Linux 2.6.32-5-amd64 x86_64
Distribution (Platform): Debian testing

-- Information about the crash:
Ktorrent closed unexpectedly after working for some time.
After restart queue entries shufled. Order of started entries is same, but absolute order is wrong.
Not on queue:
Downloads: 224;
Started: 20;
Active: 2.
Sometimes error message not generated, sometimes error message generated with abort signal

The crash can be reproduced every time.

 -- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
The current source language is "auto; currently asm".
[Current thread is 1 (Thread 0x7fc717acf760 (LWP 3224))]

Thread 6 (Thread 0x7fc70890e710 (LWP 3226)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc71502b563 in QMutexPrivate::wait (this=0x26ed2d0, timeout=-1) at thread/qmutex_unix.cpp:84
#2  0x00007fc715026e05 in QMutex::lock (this=0x26eca20) at thread/qmutex.cpp:205
#3  0x00007fc715130c92 in QMutexLocker::relock (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:120
#4  QMutexLocker (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:102
#5  ~QObject (this=<value optimized out>, __in_chrg=<value optimized out>) at kernel/qobject.cpp:896
#6  0x00007fc717673bbf in ~Connection (this=0x7fc6ed5f89e0, __in_chrg=<value optimized out>) at ../../src/utp/connection.cpp:91
#7  0x00007fc71766e526 in utp::UTPServer::clearDeadConnections (this=0x26ecfd0) at ../../src/utp/utpserver.cpp:404
#8  0x00007fc7175c2864 in utp::UTPServer::qt_metacall (this=0x26ecfd0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fc70890d440) at moc_utpserver.cpp:150
#9  0x00007fc71512e2e6 in QMetaObject::activate (sender=0x7fc70890de30, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0xffffffffffffffff) at kernel/qobject.cpp:3295
#10 0x00007fc71512ab43 in QObject::event (this=0x7fc70890de30, e=0x7fc70890db70) at kernel/qobject.cpp:1212
#11 0x00007fc7144bb32c in QApplicationPrivate::notify_helper (this=0x26d5aa0, receiver=0x7fc70890de30, e=0x7fc70890db70) at kernel/qapplication.cpp:4302
#12 0x00007fc7144c180b in QApplication::notify (this=0x7fff8b8e0140, receiver=0x7fc70890de30, e=0x7fc70890db70) at kernel/qapplication.cpp:4185
#13 0x0000000000439a0a in kt::App::notify (this=0x26ed31c, receiver=0x80, event=0x1) at ../../ktorrent/app.cpp:97
#14 0x00007fc71511b09c in QCoreApplication::notifyInternal (this=0x7fff8b8e0140, receiver=0x7fc70890de30, event=0x7fc70890db70) at kernel/qcoreapplication.cpp:726
#15 0x00007fc715147e72 in QCoreApplication::sendEvent (this=0x7fc7040011f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#16 QTimerInfoList::activateTimers (this=0x7fc7040011f0) at kernel/qeventdispatcher_unix.cpp:603
#17 0x00007fc7151449e8 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#18 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#19 0x00007fc70fab56f2 in g_main_dispatch (context=0x26ec200) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:1960
#20 IA__g_main_context_dispatch (context=0x26ec200) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2513
#21 0x00007fc70fab9568 in g_main_context_iterate (context=0x26ec200, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2591
#22 0x00007fc70fab971c in IA__g_main_context_iteration (context=0x26ec200, may_block=1) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2654
#23 0x00007fc715144706 in QEventDispatcherGlib::processEvents (this=0x27fd920, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#24 0x00007fc7151199c2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#25 0x00007fc715119d9c in QEventLoop::exec (this=0x7fc70890dde0, flags=) at kernel/qeventloop.cpp:201
#26 0x00007fc71502977b in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#27 0x00007fc71767238e in utp::UTPServerThread::run (this=0x27fd9e0) at ../../src/utp/utpserverthread.cpp:44
#28 0x00007fc71502be15 in QThreadPrivate::start (arg=0x27fd9e0) at thread/qthread_unix.cpp:248
#29 0x00007fc7109db8ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#30 0x00007fc71388502d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#31 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fc703fff710 (LWP 3227)):
#0  0x00007fc71387e8d3 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fc71763ab22 in dht::RPCServerThread::run (this=0x26f0ae0) at ../../src/dht/rpcserver.cpp:107
#2  0x00007fc71502be15 in QThreadPrivate::start (arg=0x26f0ae0) at thread/qthread_unix.cpp:248
#3  0x00007fc7109db8ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#4  0x00007fc71388502d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fc6f4fed710 (LWP 3237)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc71502b563 in QMutexPrivate::wait (this=0x26aa1e0, timeout=-1) at thread/qmutex_unix.cpp:84
#2  0x00007fc715026de5 in QMutex::lock (this=0x6d69c8) at thread/qmutex.cpp:167
#3  0x00007fc7175db80d in net::DownloadThread::waitForSocketReady (this=0x26aa260) at ../../src/net/downloadthread.cpp:110
#4  0x00007fc7175dba46 in net::DownloadThread::update (this=0x26aa22c) at ../../src/net/downloadthread.cpp:48
#5  0x00007fc7175dc529 in net::NetworkThread::run (this=0x26aa260) at ../../src/net/networkthread.cpp:48
#6  0x00007fc71502be15 in QThreadPrivate::start (arg=0x26aa260) at thread/qthread_unix.cpp:248
#7  0x00007fc7109db8ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#8  0x00007fc71388502d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fc6f47ec710 (LWP 3238)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc71502b563 in QMutexPrivate::wait (this=0x26ed1b0, timeout=-1) at thread/qmutex_unix.cpp:84
#2  0x00007fc715026de5 in QMutex::lock (this=0x26ed088) at thread/qmutex.cpp:167
#3  0x00007fc71766f07c in QMutexLocker::relock (this=0x26ecfd0, p=0x26aa8c0, mode=net::Poll::OUTPUT, conn=0xffffffffffffffff) at /usr/include/qt4/QtCore/qmutex.h:120
#4  QMutexLocker (this=0x26ecfd0, p=0x26aa8c0, mode=net::Poll::OUTPUT, conn=0xffffffffffffffff) at /usr/include/qt4/QtCore/qmutex.h:102
#5  utp::UTPServer::preparePolling (this=0x26ecfd0, p=0x26aa8c0, mode=net::Poll::OUTPUT, conn=0xffffffffffffffff) at ../../src/utp/utpserver.cpp:519
#6  0x00007fc717676829 in utp::UTPSocket::prepare (this=0x7fc6ed08b360, p=0x26aa8c0, mode=net::Poll::OUTPUT) at ../../src/utp/utpsocket.cpp:199
#7  0x00007fc7175daff4 in net::UploadThread::waitForSocketsReady (this=0x26aa8b0) at ../../src/net/uploadthread.cpp:124
#8  0x00007fc7175db0f6 in net::UploadThread::update (this=0x26ed1fc) at ../../src/net/uploadthread.cpp:45
#9  0x00007fc7175dc529 in net::NetworkThread::run (this=0x26aa8b0) at ../../src/net/networkthread.cpp:48
#10 0x00007fc71502be15 in QThreadPrivate::start (arg=0x26aa8b0) at thread/qthread_unix.cpp:248
#11 0x00007fc7109db8ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#12 0x00007fc71388502d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc6f3feb710 (LWP 3239)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc71502ce6b in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x7fc70458ec00, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x7fc70458ec00, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007fc7175df252 in net::ReverseResolverThread::run (this=0x7fc70458ebf0) at ../../src/net/reverseresolver.cpp:123
#4  0x00007fc71502be15 in QThreadPrivate::start (arg=0x7fc70458ebf0) at thread/qthread_unix.cpp:248
#5  0x00007fc7109db8ba in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007fc71388502d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fc717acf760 (LWP 3224)):
[KCrash Handler]
#5  0x00007fc71512bb58 in queued_activate (sender=0x7fc704559688, signal=4, c=0x7fc704169150, argv=0x7fff8b8df6e0, semaphore=0x0) at kernel/qobject.cpp:3157
#6  0x00007fc71512e1ca in QMetaObject::activate (sender=0x7fc704559688, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7fff8b8df6e0) at kernel/qobject.cpp:3266
#7  0x00007fc71512ab43 in QObject::event (this=0x7fc704559688, e=0x7fff8b8dfe10) at kernel/qobject.cpp:1212
#8  0x00007fc7144bb32c in QApplicationPrivate::notify_helper (this=0x26d5aa0, receiver=0x7fc704559688, e=0x7fff8b8dfe10) at kernel/qapplication.cpp:4302
#9  0x00007fc7144c180b in QApplication::notify (this=0x7fff8b8e0140, receiver=0x7fc704559688, e=0x7fff8b8dfe10) at kernel/qapplication.cpp:4185
#10 0x0000000000439a0a in kt::App::notify (this=0x4, receiver=0x4, event=0x4000400000011) at ../../ktorrent/app.cpp:97
#11 0x00007fc71511b09c in QCoreApplication::notifyInternal (this=0x7fff8b8e0140, receiver=0x7fc704559688, event=0x7fff8b8dfe10) at kernel/qcoreapplication.cpp:726
#12 0x00007fc715147e72 in QCoreApplication::sendEvent (this=0x26d92f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#13 QTimerInfoList::activateTimers (this=0x26d92f0) at kernel/qeventdispatcher_unix.cpp:603
#14 0x00007fc7151449e8 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#15 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#16 0x00007fc70fab56f2 in g_main_dispatch (context=0x26d81f0) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:1960
#17 IA__g_main_context_dispatch (context=0x26d81f0) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2513
#18 0x00007fc70fab9568 in g_main_context_iterate (context=0x26d81f0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2591
#19 0x00007fc70fab971c in IA__g_main_context_iteration (context=0x26d81f0, may_block=1) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2654
#20 0x00007fc7151446b3 in QEventDispatcherGlib::processEvents (this=0x26a81d0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#21 0x00007fc71456b19e in QGuiEventDispatcherGlib::processEvents (this=0x4, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#22 0x00007fc7151199c2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#23 0x00007fc715119d9c in QEventLoop::exec (this=0x7fff8b8e00b0, flags=) at kernel/qeventloop.cpp:201
#24 0x00007fc71511ea2b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#25 0x0000000000428f5b in main (argc=<value optimized out>, argv=<value optimized out>) at ../../ktorrent/main.cpp:176

Reported using DrKonqi