Bug 289585

Application: ktorrent (4.1.1)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

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

Since a couple of months i use an encrypted home directory and i noticed that the starting of a download is slow (something with allocating space in the encrypted home?) so today i decided to download the linuxmint iso directly into /boot/images.

therefore in the console i did
sudo -i
mkdir /boot/images
chgrp plugdev /boot/images
chmod -R g+w /boot/images
ls -ld /boot/images/
drwxrwxr-x 2 root plugdev 4096 2011-12-22 14:31 /boot/images/

the i downloaded the torrent http://torrents.linuxmint.com/torrents/linuxmint-201109-gnome-dvd-64bit.iso.torrent and told ktorrent to use /boot/images

more or less at the same time i deleted the files from another torrent that had already been downloaded and consequently i got the "files not found" - "do you want to recreate" dialog from ktorrent

now i dont recall whether the recreate-dialog or the /boot/images-download came first but after these two operations ktorrent crashed and it crashes immediatly again when i tried to restart it.

The crash can be reproduced every time.

-- Backtrace:
Application: KTorrent (ktorrent), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f51b5c40780 (LWP 6458))]

Thread 7 (Thread 0x7f51a2062700 (LWP 6460)):
#0  0x00007f51aef9103e in __pthread_mutex_lock (mutex=0x7f519c000968) at pthread_mutex_lock.c:62
#1  0x00007f51ad579361 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f51ad579e6a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f51ad57a429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f51b3499f3e in QEventDispatcherGlib::processEvents (this=0x12392c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f51b346dcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f51b346def7 in QEventLoop::exec (this=0x7f51a2061e00, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f51b338527f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f51b3387d05 in QThreadPrivate::start (arg=0x1233940) at thread/qthread_unix.cpp:331
#9  0x00007f51aef8eefc in start_thread (arg=0x7f51a2062700) at pthread_create.c:304
#10 0x00007f51b1bc489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f51a1861700 (LWP 6461)):
#0  0x00007f51b57a9d40 in ref (this=0x11a162c) at /usr/include/qt4/QtCore/qatomic_x86_64.h:121
#1  ref (this=<optimized out>) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:326
#2  ExternalRefCount (other=<optimized out>, this=0x7f51a1860d90) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:389
#3  QSharedPointer (other=<optimized out>, this=0x7f51a1860d90) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:465
#4  dht::RPCServer::Private::run (this=0x1259630) at ../../src/dht/rpcserver.cpp:97
#5  0x00007f51b3387d05 in QThreadPrivate::start (arg=0x1259630) at thread/qthread_unix.cpp:331
#6  0x00007f51aef8eefc in start_thread (arg=0x7f51a1861700) at pthread_create.c:304
#7  0x00007f51b1bc489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f5193bb0700 (LWP 6462)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f519aee1c2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f519aee1d59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f51aef8eefc in start_thread (arg=0x7f5193bb0700) at pthread_create.c:304
#4  0x00007f51b1bc489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f51932af700 (LWP 6463)):
#0  0x00007f51aef921fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x1d9af78) at pthread_mutex_unlock.c:290
#2  0x00007f51ad5793f5 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f51ad579e6a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f51ad57a429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f51b3499f3e in QEventDispatcherGlib::processEvents (this=0x1d9ad00, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f51b346dcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f51b346def7 in QEventLoop::exec (this=0x7f51932aee00, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007f51b338527f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007f51b3387d05 in QThreadPrivate::start (arg=0x1d9a4e0) at thread/qthread_unix.cpp:331
#10 0x00007f51aef8eefc in start_thread (arg=0x7f51932af700) at pthread_create.c:304
#11 0x00007f51b1bc489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f5191c36700 (LWP 6477)):
#0  begin (this=0x6de500) at ../../src/net/downloadthread.cpp:135
#1  net::DownloadThread::waitForSocketReady (this=0x110fdf0) at ../../src/net/downloadthread.cpp:117
#2  0x00007f51b5744336 in net::DownloadThread::update (this=0x110fdf0) at ../../src/net/downloadthread.cpp:48
#3  0x00007f51b5744549 in net::NetworkThread::run (this=0x110fdf0) at ../../src/net/networkthread.cpp:48
#4  0x00007f51b3387d05 in QThreadPrivate::start (arg=0x110fdf0) at thread/qthread_unix.cpp:331
#5  0x00007f51aef8eefc in start_thread (arg=0x7f5191c36700) at pthread_create.c:304
#6  0x00007f51b1bc489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f514c0e6700 (LWP 6478)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f51b3386d13 in QMutexPrivate::wait (this=0x1110720, timeout=-1) at thread/qmutex_unix.cpp:84
#2  0x00007f51b3383345 in QMutex::lock (this=0x110f900) at thread/qmutex.cpp:167
#3  0x00007f51b5743c50 in update (this=0x110f740) at ../../src/net/uploadthread.cpp:49
#4  net::UploadThread::update (this=0x110f740) at ../../src/net/uploadthread.cpp:43
#5  0x00007f51b5744549 in net::NetworkThread::run (this=0x110f740) at ../../src/net/networkthread.cpp:48
#6  0x00007f51b3387d05 in QThreadPrivate::start (arg=0x110f740) at thread/qthread_unix.cpp:331
#7  0x00007f51aef8eefc in start_thread (arg=0x7f514c0e6700) at pthread_create.c:304
#8  0x00007f51b1bc489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f51b5c40780 (LWP 6458)):
[KCrash Handler]
#6  bt::PieceData::write (this=0x0, buf=0x2707228 "3\355\372\216\325\274", buf_size=256893, off=0) at ../../src/diskio/piecedata.cpp:61
#7  0x00007f51b57677a7 in bt::WebSeed::handleData (this=0x14e3460, tmp=...) at ../../src/download/webseed.cpp:426
#8  0x00007f51b5767a02 in bt::WebSeed::readData (this=0x14e3460) at ../../src/download/webseed.cpp:397
#9  0x00007f51b5768f75 in bt::WebSeed::update (this=0x14e3460) at ../../src/download/webseed.cpp:353
#10 0x00007f51b57723e7 in bt::Downloader::update (this=0x14c2100) at ../../src/download/downloader.cpp:204
#11 0x00007f51b578e3a9 in bt::TorrentControl::update (this=0x139ef60) at ../../src/torrent/torrentcontrol.cpp:175
#12 0x000000000042b9bd in kt::Core::update (this=0x1247890) at ../../ktorrent/core.cpp:1052
#13 0x000000000043304d in kt::Core::qt_metacall (this=0x1247890, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0x7fffb3db8e20) at ./core.moc:164
#14 0x00007f51b3481eba in QMetaObject::activate (sender=0x12478b8, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3278
#15 0x00007f51b3485789 in QObject::event (this=0x12478b8, e=<optimized out>) at kernel/qobject.cpp:1181
#16 0x00007f51b281f424 in notify_helper (e=0x7fffb3db9360, receiver=0x12478b8, this=0x1135450) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x1135450, receiver=0x12478b8, e=0x7fffb3db9360) at kernel/qapplication.cpp:4458
#18 0x00007f51b2824291 in QApplication::notify (this=0x7fffb3db9660, receiver=0x12478b8, e=0x7fffb3db9360) 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 0x00007f51b346eafc in QCoreApplication::notifyInternal (this=0x7fffb3db9660, receiver=0x12478b8, event=0x7fffb3db9360) at kernel/qcoreapplication.cpp:787
#21 0x00007f51b349bd62 in sendEvent (event=0x7fffb3db9360, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x113bc00) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007f51b3499514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 0x00007f51ad579a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f51ad57a258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f51ad57a429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f51b3499ed6 in QEventDispatcherGlib::processEvents (this=0x10e1fa0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#28 0x00007f51b28c707e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x00007f51b346dcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007f51b346def7 in QEventLoop::exec (this=0x7fffb3db95f0, flags=...) at kernel/qeventloop.cpp:201
#31 0x00007f51b3472789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#32 0x0000000000428362 in main (argc=1, argv=0x7fffb3dba4d8) at ../../ktorrent/main.cpp:177

Possible duplicates by query: bug 281605.

Reported using DrKonqi