Hi,

I'm using KDE 3.5.5 with Ktorrent 2.0.3 under Debian Unstable.
Ktorrent started to crash 2 days before. I don't changed anything in my system for weeks.

Here is the backtrace:
Using host libthread_db library "/lib/tls/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1234114880 (LWP 4486)]
[New Thread -1246168144 (LWP 4501)]
[KCrash handler]
#5 0xb7eae8ab in dht::ParseRsp () from /usr/lib/libktorrent.so.0
#6 0xb7eaf772 in dht::MakeRPCMsg () from /usr/lib/libktorrent.so.0
#7 0xb7eaf86f in dht::RPCServer::readPacket () from
#/usr/lib/libktorrent.so.0
#8 0xb7eafbd2 in dht::RPCServer::qt_invoke () from
#/usr/lib/libktorrent.so.0
#9 0xb6f52d4f in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#10 0xb6f537e0 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#11 0xb76c764c in KNetwork::KClientSocketBase::readyRead ()
from /usr/lib/libkdecore.so.4
#12 0xb76c7686 in KNetwork::KClientSocketBase::slotReadActivity ()
from /usr/lib/libkdecore.so.4
#13 0xb76da7d5 in KNetwork::KClientSocketBase::qt_invoke ()
from /usr/lib/libkdecore.so.4
#14 0xb76da874 in KNetwork::KDatagramSocket::qt_invoke ()
from /usr/lib/libkdecore.so.4
#15 0xb6f52d4f in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#16 0xb6f53656 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#17 0xb72dcc7b in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#18 0xb6f754fa in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#19 0xb6eeac26 in QApplication::internalNotify () from
#/usr/lib/libqt-mt.so.3
#20 0xb6eeca43 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#21 0xb769be0e in KApplication::notify () from /usr/lib/libkdecore.so.4
#22 0xb6e7e421 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#23 0xb6edcfd9 in QEventLoop::activateSocketNotifiers ()
from /usr/lib/libqt-mt.so.3
#24 0xb6e92754 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#25 0xb6f05179 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#26 0xb6f04f9a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#27 0xb6eec7bf in QApplication::exec () from /usr/lib/libqt-mt.so.3
#28 0x08065d4b in ?? ()
#29 0xb6753ea8 in __libc_start_main () from /lib/tls/libc.so.6
#30 0x0805e2b1 in ?? ()

Can you upgrade to 2.1.3, and see if you get the same problems there ? There is a good chance it might already be fixed.

Dunno, I got something similar using a SVN not older than 24 hours:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47463872986960 (LWP 21281)]
0x00002b2b066dce5c in dht::ParseRsp (dict=0x1745ba0, srv=0xa0b560) at rpcmsg.cpp:163
163 Uint8 mtid = (Uint8)dict->getValue(TID)->data().toByteArray().at(0);
(gdb) bt
#0 0x00002b2b066dce5c in dht::ParseRsp (dict=0x1745ba0, srv=0xa0b560) at rpcmsg.cpp:163
#1 0x00002b2b066ddcf0 in dht::MakeRPCMsg (dict=0x1745ba0, srv=0xa0b560) at rpcmsg.cpp:203
#2 0x00002b2b066cec6b in dht::RPCServer::readPacket (this=0xa0b560) at rpcserver.cpp:131
#3 0x00002b2b066cef6a in dht::RPCServer::qt_invoke (this=0xa0b560, _id=2, _o=0x7fffa466aa80) at rpcserver.moc:82
#4 0x00002b2b0858c34c in QObject::activate_signal (this=0xa0b650, clist=0xa0c4c0, o=0x7fffa466aa80) at kernel/qobject.cpp:2356
#5 0x00002b2b0858d283 in QObject::activate_signal (this=0xa0b650, signal=9) at kernel/qobject.cpp:2325
#6 0x00002b2b078e9c6f in KNetwork::KClientSocketBase::qt_invoke () from /usr/kde/3.5/lib64/libkdecore.so.4
#7 0x00002b2b078eda7a in KNetwork::KDatagramSocket::qt_invoke () from /usr/kde/3.5/lib64/libkdecore.so.4
#8 0x00002b2b0858c34c in QObject::activate_signal (this=0xa0c220, clist=0xa0c1e0, o=0x7fffa466ac10) at kernel/qobject.cpp:2356
#9 0x00002b2b0858d00a in QObject::activate_signal (this=0xa0c220, signal=2, param=15) at kernel/qobject.cpp:2449
#10 0x00002b2b0897f0f0 in QSocketNotifier::activated (this=0xa0c220, t0=15) at .moc/debug-shared-mt/moc_qsocketnotifier.cpp:85
#11 0x00002b2b085b3260 in QSocketNotifier::event (this=0xa0c220, e=0x7fffa466b120) at kernel/qsocketnotifier.cpp:258
#12 0x00002b2b08519562 in QApplication::internalNotify (this=0x7fffa466b520, receiver=0xa0c220, e=0x7fffa466b120)
at kernel/qapplication.cpp:2635
#13 0x00002b2b0851b4b1 in QApplication::notify (this=0x7fffa466b520, receiver=0xa0c220, e=0x7fffa466b120) at kernel/qapplication.cpp:2358
#14 0x00002b2b077cfe5e in KApplication::notify () from /usr/kde/3.5/lib64/libkdecore.so.4
#15 0x0000000000494cbe in QApplication::sendEvent (receiver=0xa0c220, event=0x7fffa466b120) at /usr/qt/3/include/qapplication.h:496
#16 0x00002b2b0850a376 in QEventLoop::activateSocketNotifiers (this=0x65aca0) at kernel/qeventloop_unix.cpp:578
#17 0x00002b2b084b788c in QEventLoop::processEvents (this=0x65aca0, flags=4) at kernel/qeventloop_x11.cpp:383
#18 0x00002b2b085370b2 in QEventLoop::enterLoop (this=0x65aca0) at kernel/qeventloop.cpp:198
#19 0x00002b2b08536ebb in QEventLoop::exec (this=0x65aca0) at kernel/qeventloop.cpp:145
#20 0x00002b2b0851b1b6 in QApplication::exec (this=0x7fffa466b520) at kernel/qapplication.cpp:2758
#21 0x000000000045417f in main (argc=4, argv=0x7fffa466b848) at main.cpp:127
#22 0x00002b2b0b27e374 in __libc_start_main () from /lib/libc.so.6
#23 0x000000000042cd89 in _start ()
(gdb) print dict
$1 = (class bt::BDictNode *) 0x1745ba0
(gdb) print dict->getValue(TID)
$2 = (class bt::BValueNode *) 0x43091a0
(gdb) print dict->getValue(TID)->data()
$3 = (const bt::Value &) @0x43091b8: {type = bt::Value::STRING, ival = 0, strval = {<QGArray> = {_vptr.QGArray = 0x4b87d0,
shd = 0x1bb89e0}, <No data fields>}, big_ival = 0}
(gdb) print dict->getValue(TID)->data().toByteArray()
$4 = {<QGArray> = {_vptr.QGArray = 0x4b87d0, shd = 0x1bb89e0}, <No data fields>}
(gdb) print dict->getValue(TID)->data().toByteArray().at(0)
Attempt to take address of value not located in memory.
(gdb) list
158 Out(SYS_DHT|LOG_DEBUG) << "ParseRsp : args || !args->getValue(id) || !dict->getValue(TID)" << endl;
159 return 0;
160 }
161
162
163 Uint8 mtid = (Uint8)dict->getValue(TID)->data().toByteArray().at(0);
164 // find the call
165 const RPCCall* c = srv->findCall(mtid);
166 if (!c)
167 {

I just fixed this, though I'm not quite sure, I haven't seen this crash yet. But I just eliminated the most probable cause.

Strange that this problem is suddenly occurring, it probably is just a buggy client sending bad DHT packets, and we didn't handle this properly.

does it look like my crash is being caused by the same thing?

I'm using Mandriva 07 and 2.1.3 btw...

(no debugging symbols found)
Using host libthread_db library "/lib/i686/libthread_db.so.1".
(no debugging symbols found)
`shared object read from target memory' has disappeared; keeping its symbols.
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(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1236441392 (LWP 5560)]
[New Thread -1255253088 (LWP 5582)]
[New Thread -1246860384 (LWP 5581)]
(no debugging symbols found)
(no debugging symbols found)
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[KCrash handler]
#6 0xb7da9f38 in dht::ParseRsp () from /usr/lib/libktorrent-2.1.3.so
#7 0xb7daae70 in dht::MakeRPCMsg () from /usr/lib/libktorrent-2.1.3.so
#8 0xb7dab011 in dht::RPCServer::readPacket ()
from /usr/lib/libktorrent-2.1.3.so
#9 0xb7dab364 in dht::RPCServer::qt_invoke ()
from /usr/lib/libktorrent-2.1.3.so
#10 0xb6dee04d in QObject::activate_signal ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#11 0xb6deec5d in QObject::activate_signal ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#12 0xb74e636a in KNetwork::KClientSocketBase::readyRead ()
from /usr/lib/libkdecore.so.4
#13 0xb74e6394 in KNetwork::KClientSocketBase::slotReadActivity ()
from /usr/lib/libkdecore.so.4
#14 0xb74f8c77 in KNetwork::KClientSocketBase::qt_invoke ()
from /usr/lib/libkdecore.so.4
#15 0xb74f8d47 in KNetwork::KDatagramSocket::qt_invoke ()
from /usr/lib/libkdecore.so.4
#16 0xb6dee04d in QObject::activate_signal ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#17 0xb6deeb62 in QObject::activate_signal ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#18 0xb71014e0 in QSocketNotifier::activated ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#19 0xb6e0bfa0 in QSocketNotifier::event ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#20 0xb6d91037 in QApplication::internalNotify ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#21 0xb6d91ea9 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#22 0xb74b7dba in KApplication::notify () from /usr/lib/libkdecore.so.4
#23 0xb6d85d01 in QEventLoop::activateSocketNotifiers ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#24 0xb6d42894 in QEventLoop::processEvents ()
from /usr/lib/qt3/lib/libqt-mt.so.3
#25 0xb6da6a60 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#26 0xb6da6916 in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#27 0xb6d909ef in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#28 0x08075334 in StupidWarningMessagesFromQt ()
#29 0xb64ef75c in __libc_start_main () from /lib/i686/libc.so.6
#30 0x08065311 in ?? ()

i have an error very similar to the last one posted, using kubuntu feisty and ktorrent version 2.1.3

Code: Select all

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
...
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1235167536 (LWP 9765)]
[New Thread -1268696176 (LWP 9791)]
[New Thread -1256100976 (LWP 9790)]
(no debugging symbols found)
...
(no debugging symbols found)
[KCrash handler]
#6  0xb7e6a46b in dht::ParseRsp () from /usr/lib/libktorrent-2.1.3.so
#7  0xb7e6a692 in dht::MakeRPCMsg () from /usr/lib/libktorrent-2.1.3.so
#8  0xb7e5f6c2 in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.3.so
#9  0xb7e5f9e2 in dht::RPCServer::qt_invoke ()
   from /usr/lib/libktorrent-2.1.3.so
#10 0xb6ea488b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#11 0xb6ea5330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#12 0xb762e04c in KNetwork::KClientSocketBase::readyRead ()
   from /usr/lib/libkdecore.so.4
#13 0xb762e086 in KNetwork::KClientSocketBase::slotReadActivity ()
   from /usr/lib/libkdecore.so.4
#14 0xb7640143 in KNetwork::KClientSocketBase::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#15 0xb76401e6 in KNetwork::KDatagramSocket::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#16 0xb6ea488b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#17 0xb6ea51a2 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#18 0xb7231877 in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#19 0xb6ec744a in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#20 0xb6e3ba60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#21 0xb6e3d88f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#22 0xb75ffce2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#23 0xb6dce1e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#24 0xb6e2de59 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/libqt-mt.so.3
#25 0xb6de2d07 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#26 0xb6e56136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#27 0xb6e55f46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#28 0xb6e3d609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#29 0x08065487 in ?? ()
#30 0xb6653ebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#31 0x08064f01 in ?? ()

Interresting thread, my ktorrent started to crash today. I figured out that it happens as soon as I enable dht:

Code: Select all

Qt: Warning: QGArray::at: Absolute index 0 out of range

Seems to be some kind of DHT problem.

Upgrade to 2.1.4, this problem should be fixed in that release.

Seems to work fine now, thanks.

Thanks, i disabled dht temporarily, till the 2.1.4 kubuntu package is out.
This helped avoiding this bug. however, i ran into another bug when the shedulerplugin stopped the file transfers.

KTorrent 2.1.3
Kubuntu Feisty

Code: Select all

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
...
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1235212592 (LWP 5699)]
[New Thread -1276867696 (LWP 5761)]
[New Thread -1243550832 (LWP 5760)]
(no debugging symbols found)
...
(no debugging symbols found)
[KCrash handler]
#6  0xb6e9d83a in QGVector::size () from /usr/lib/libqt-mt.so.3
#7  0xb6e9d87f in QPtrVector<QConnectionList>::size ()
   from /usr/lib/libqt-mt.so.3
#8  0xb6e9dab7 in QSignalVec::at () from /usr/lib/libqt-mt.so.3
#9  0xb6e98964 in QObject::receivers () from /usr/lib/libqt-mt.so.3
#10 0xb7e63984 in dht::Task::finished () from /usr/lib/libktorrent-2.1.3.so
#11 0xb7e63af5 in dht::Task::kill () from /usr/lib/libktorrent-2.1.3.so
#12 0xb7e673ed in dht::DHTTrackerBackend::stop ()
   from /usr/lib/libktorrent-2.1.3.so
#13 0xb7e49922 in bt::PeerSourceManager::stop ()
   from /usr/lib/libktorrent-2.1.3.so
#14 0xb7e0ff8c in bt::TorrentControl::stop ()
   from /usr/lib/libktorrent-2.1.3.so
#15 0xb7e40a04 in bt::QueueManager::stopSafely ()
   from /usr/lib/libktorrent-2.1.3.so
#16 0xb7e40fd3 in bt::QueueManager::setPausedState ()
   from /usr/lib/libktorrent-2.1.3.so
#17 0xb3e752c5 in kt::BWScheduler::trigger ()
   from /usr/lib/kde3/ktschedulerplugin.so
#18 0xb3e73803 in kt::SchedulerPlugin::timer_triggered ()
   from /usr/lib/kde3/ktschedulerplugin.so
#19 0xb3e89398 in kt::SchedulerPlugin::qt_invoke ()
   from /usr/lib/kde3/ktschedulerplugin.so
#20 0xb6e9988b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#21 0xb6e9a330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#22 0xb7227ba6 in QTimer::timeout () from /usr/lib/libqt-mt.so.3
#23 0xb6ec1596 in QTimer::event () from /usr/lib/libqt-mt.so.3
#24 0xb6e30a60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#25 0xb6e3288f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#26 0xb75f4ce2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#27 0xb6dc31e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#28 0xb6e234ab in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#29 0xb6dd7d25 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#30 0xb6e4b136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#31 0xb6e4af46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#32 0xb6e32609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#33 0x08065487 in ?? ()
#34 0xb6648ebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#35 0x08064f01 in ?? ()


My KTorrent is crashing.

I've Feisty
KDE 3.5.6
KTorrent 2.1
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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1235178864 (LWP 10235)]
[New Thread -1335129200 (LWP 10346)]
[New Thread -1326736496 (LWP 10345)]
[New Thread -1318343792 (LWP 10344)]
[New Thread -1309951088 (LWP 10343)]
[New Thread -1301030000 (LWP 10342)]
[New Thread -1292637296 (LWP 10341)]
[New Thread -1284244592 (LWP 10340)]
[New Thread -1275851888 (LWP 10339)]
[New Thread -1258558576 (LWP 10241)]
[New Thread -1249440880 (LWP 10236)]
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[KCrash handler]
#6 0xb7e65b9b in dht::ParseRsp () from /usr/lib/libktorrent-2.1.so
#7 0xb7e65dc2 in dht::MakeRPCMsg () from /usr/lib/libktorrent-2.1.so
#8 0xb7e5af21 in dht::RPCServer::readPacket ()
from /usr/lib/libktorrent-2.1.so
#9 0xb7e5b222 in dht::RPCServer::qt_invoke ()
from /usr/lib/libktorrent-2.1.so
#10 0xb6e9f88b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#11 0xb6ea0330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#12 0xb762904c in KNetwork::KClientSocketBase::readyRead ()
from /usr/lib/libkdecore.so.4
#13 0xb7629086 in KNetwork::KClientSocketBase::slotReadActivity ()
from /usr/lib/libkdecore.so.4
#14 0xb763b143 in KNetwork::KClientSocketBase::qt_invoke ()
from /usr/lib/libkdecore.so.4
#15 0xb763b1e6 in KNetwork::KDatagramSocket::qt_invoke ()
from /usr/lib/libkdecore.so.4
#16 0xb6e9f88b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#17 0xb6ea01a2 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#18 0xb722c877 in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#19 0xb6ec244a in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#20 0xb6e36a60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#21 0xb6e3888f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#22 0xb75face2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#23 0xb6dc91e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#24 0xb6e28e59 in QEventLoop::activateSocketNotifiers ()
from /usr/lib/libqt-mt.so.3
#25 0xb6dddd07 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#26 0xb6e51136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#27 0xb6e50f46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#28 0xb6e38609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#29 0x080653d6 in ?? ()
#30 0xb6650ebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#31 0x08064ec1 in ?? ()

Do you have 2.1.3 or 2.1.4?

after going over the forum, I downloaded the latest package here on the website so I think I've the latest version now. We'll see if there's any more crashes.

This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents creation of proper backtraces, or the stack frame was seriously corrupted in the crash.

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
(no debugging symbols found)
0xffffe410 in __kernel_vsyscall ()
#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb66f8e66 in ?? ()
#2 0x00000000 in ?? ()