Forgot to mention that the same thing happens if I install the qca-tls package from apt (I'm using Debian) and copy the plugin manually to qt-copy directory.

I can confirm that with kopete from today's trunk. When I set my gtalk account to offline, it crashes with the backtrace below. That doesn't happen with my jabber.org account, which doesn't use tls.

Εφαρμογή: Kopete (kopete), σήμα SIGSEGV
0x00007f8189257ff1 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 894)]

Thread 3 (Thread 0x42fcd950 (LWP 1220)):
#0  0x00007f8189280b66 in poll () from /lib/libc.so.6
#1  0x00007f81871dbdf8 in g_main_context_iterate (context=0x1010c60, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2954
#2  0x00007f81871dc11b in IA__g_main_context_iteration (context=0x1010c60, may_block=1) at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2708
#3  0x00007f818999572e in QEventDispatcherGlib::processEvents (this=0xcc44c0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:321
#4  0x00007f818996bca2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1123864416}) at kernel/qeventloop.cpp:143
#5  0x00007f818996be2d in QEventLoop::exec (this=0xc6d400, flags={i = 1123864816}) at kernel/qeventloop.cpp:194
#6  0x00007f8176b94f9b in QCA::SyncThread::run () from /usr/lib/libqca.so.2
#7  0x00007f8189885162 in QThreadPrivate::start (arg=0xfff300) at thread/qthread_unix.cpp:185
#8  0x00007f8186f89fc7 in start_thread () from /lib/libpthread.so.0
#9  0x00007f81892895ad in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x427cc950 (LWP 1224)):
#0  0x00007f8186f8dd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f8189886159 in QWaitCondition::wait (this=0x10fecf0, mutex=0x10fece8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:82
#2  0x00007f8185764f4c in QHostInfoAgent::run (this=0x10fecd0) at kernel/qhostinfo.cpp:241
#3  0x00007f8189885162 in QThreadPrivate::start (arg=0x10fecd0) at thread/qthread_unix.cpp:185
#4  0x00007f8186f89fc7 in start_thread () from /lib/libpthread.so.0
#5  0x00007f81892895ad in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f818d5696f0 (LWP 894)):
[KCrash Handler]
#5  0x0000000000000170 in ?? ()
#6  0x00007f8189975895 in QMetaObject::invokeMethod (obj=0x12d7dd0, member=<value optimized out>, type=Qt::DirectConnection, ret={<QGenericArgument> = {_data = 0x0, _name = 0x0}, <No data fields>}, 
    val0={_data = 0x0, _name = 0x0}, val1={_data = 0x0, _name = 0x0}, val2={_data = 0x0, _name = 0x0}, val3={_data = 0x0, _name = 0x0}, val4={_data = 0x0, _name = 0x0}, val5=
      {_data = 0x0, _name = 0x0}, val6={_data = 0x0, _name = 0x0}, val7={_data = 0x0, _name = 0x0}, val8={_data = 0x0, _name = 0x0}, val9={_data = 0x0, _name = 0x0}) at kernel/qmetaobject.cpp:945
#7  0x00007f818577a004 in QAbstractSocket::disconnectFromHost (this=0x12d7dd0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs.h:365
#8  0x00007f818577d678 in QAbstractSocketPrivate::canReadNotification (this=0x12d8220) at socket/qabstractsocket.cpp:547
#9  0x00007f818576e5e1 in QReadNotifier::event (this=<value optimized out>, e=0x23) at socket/qnativesocketengine.cpp:968
#10 0x00007f818bea2a5d in QApplicationPrivate::notify_helper (this=0x6b0ff0, receiver=0x11209f0, e=0x7fff956aef10) at kernel/qapplication.cpp:3803
#11 0x00007f818beaa7da in QApplication::notify (this=0x7fff956af200, receiver=0x11209f0, e=0x7fff956aef10) at kernel/qapplication.cpp:3768
#12 0x00007f818a56768b in ?? () from /usr/lib/libkdeui.so.5
#13 0x0000000000000003 in ?? ()
#14 0x00007f818987ce04 in QInternal::activateCallbacks (cb=19758544, parameters=0x23) at global/qglobal.cpp:2726
#15 0x00007f818996d381 in QCoreApplication::notifyInternal (this=0x7fff956af200, receiver=0x67a770, event=0x7fff956af200) at kernel/qcoreapplication.cpp:587
#16 0x00007f8189995989 in socketNotifierSourceDispatch (source=0x6c3d80) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:209
#17 0x00007f81871d878b in IA__g_main_context_dispatch (context=0x6b3220) at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2012
#18 0x00007f81871dbf5d in g_main_context_iterate (context=0x6b3220, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2645
#19 0x00007f81871dc11b in IA__g_main_context_iteration (context=0x6b3220, may_block=1) at /build/buildd/glib2.0-2.16.6/glib/gmain.c:2708
#20 0x00007f818999570f in QEventDispatcherGlib::processEvents (this=0x6afb30, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:319
#21 0x00007f818bf3444f in QGuiEventDispatcherGlib::processEvents (this=0x12d7dd0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:198
#22 0x00007f818996bca2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1788153552}) at kernel/qeventloop.cpp:143
#23 0x00007f818996be2d in QEventLoop::exec (this=0x7fff956af170, flags={i = -1788153472}) at kernel/qeventloop.cpp:194
#24 0x00007f818996e2dd in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#25 0x000000000044a03c in main (argc=3, argv=0x7fff956affb8) at ../../../kopete/kopete/main.cpp:102

Same problem here

*** Bug 175890 has been marked as a duplicate of this bug. ***

*** Bug 178048 has been marked as a duplicate of this bug. ***

Still happening - using kde unstable from opensuse (4.2 b2?)

*** Bug 178486 has been marked as a duplicate of this bug. ***

Look at bug 178486 for a proposed patch to fix this crash. (thanks to    	 Tobias Doerffel)

Created attachment 29560 [details]
Patch for fixing the crash on Jabber-logout

As already mentioned by Darío, here's a little patch that I made and that fixes the crash for me.

SVN commit 900642 by gkiagia:

Do not crash on logout.
Patch written by Tobias Doerffel. Thanks.
BUG: 176821


 M  +1 -1      jabberbytestream.cpp  


WebSVN link: http://websvn.kde.org/?view=rev&revision=900642

*** Bug 179885 has been marked as a duplicate of this bug. ***

*** Bug 180560 has been marked as a duplicate of this bug. ***