Application: polkit-kde-authentication-agent-1 (0.97.1)
KDE Platform Version: 4.5.80 (4.6 Beta1)
Qt Version: 4.7.1
Operating System: Linux 2.6.37-7-generic x86_64
Distribution: Ubuntu natty (development branch)

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

during logout, i have this crash when i'm try to reboot my system

The crash can be reproduced every time.

-- Backtrace:
Application: PolicyKit1-KDE (polkit-kde-authentication-agent-1), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f8cb8274800 (LWP 1965))]

Thread 4 (Thread 0x7f8ca6082710 (LWP 2001)):
#0  0x00007f8cb23b7c9d in __pthread_mutex_unlock_usercnt (mutex=0x27609d8) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x27609d8) at pthread_mutex_unlock.c:290
#2  0x00007f8cb35fefa4 in g_main_context_prepare (context=0x27609d0, priority=0x7f8ca6081cfc) at /build/buildd/glib2.0-2.27.4/glib/gmain.c:2755
#3  0x00007f8cb35ffeb4 in g_main_context_iterate (context=0x27609d0, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.27.4/glib/gmain.c:3067
#4  0x00007f8cb360090a in g_main_loop_run (loop=0x276ca40) at /build/buildd/glib2.0-2.27.4/glib/gmain.c:3295
#5  0x00007f8cb30f16c4 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.27.4/gio/gdbusprivate.c:276
#6  0x00007f8cb3627304 in g_thread_create_proxy (data=0x2760ac0) at /build/buildd/glib2.0-2.27.4/glib/gthread.c:1897
#7  0x00007f8cb23b4971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#8  0x00007f8cb55f594d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f8ca4e86710 (LWP 14910)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:39
#1  0x00007f8cb530b5d6 in v4l1_read () from /usr/lib/libv4l1.so.0
#2  0x00007f8cb7e97983 in read () from /usr/lib/libv4l/v4l1compat.so
#3  0x00007f8cb360198b in read (data=<value optimized out>) at /usr/include/bits/unistd.h:45
#4  child_watch_helper_thread (data=<value optimized out>) at /build/buildd/glib2.0-2.27.4/glib/gmain.c:4289
#5  0x00007f8cb3627304 in g_thread_create_proxy (data=0x2bc3110) at /build/buildd/glib2.0-2.27.4/glib/gthread.c:1897
#6  0x00007f8cb23b4971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#7  0x00007f8cb55f594d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f8ca2781710 (LWP 14918)):
#0  idleTimerSourcePrepare (source=<value optimized out>, timeout=0x7f8ca2780b9c) at kernel/qeventdispatcher_glib.cpp:207
#1  0x00007f8cb35fefb2 in g_main_context_prepare (context=0x2bf0920, priority=0x7f8ca2780c0c) at /build/buildd/glib2.0-2.27.4/glib/gmain.c:2757
#2  0x00007f8cb35ffeb4 in g_main_context_iterate (context=0x2bf0920, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.27.4/glib/gmain.c:3067
#3  0x00007f8cb3600559 in g_main_context_iteration (context=0x2bf0920, may_block=1) at /build/buildd/glib2.0-2.27.4/glib/gmain.c:3150
#4  0x00007f8cb69cef26 in QEventDispatcherGlib::processEvents (this=0x279aeb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:417
#5  0x00007f8cb69a3362 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f8cb69a359c in QEventLoop::exec (this=0x7f8ca2780d20, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f8cb68ba274 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#8  0x00007f8cb698582f in QInotifyFileSystemWatcherEngine::run (this=0x27a1390) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f8cb68bca2e in QThreadPrivate::start (arg=0x27a1390) at thread/qthread_unix.cpp:285
#10 0x00007f8cb23b4971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#11 0x00007f8cb55f594d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8cb8274800 (LWP 1965)):
[KCrash Handler]
#6  g_type_check_instance_is_a (type_instance=0x275ec00, iface_type=<value optimized out>) at /build/buildd/glib2.0-2.27.4/gobject/gtype.c:3941
#7  0x00007f8cb3379cfb in g_object_unref (_object=0x275ec00) at /build/buildd/glib2.0-2.27.4/gobject/gobject.c:2648
#8  0x00007f8cb2c182ab in ?? () from /usr/lib/libpolkit-agent-1.so.0
#9  0x00007f8cb3379e44 in g_object_unref (_object=0x2773800) at /build/buildd/glib2.0-2.27.4/gobject/gobject.c:2714
#10 0x00007f8cb7422be4 in PolkitQt1::Agent::Session::~Session() () from /usr/lib/libpolkit-qt-agent-1.so.0
#11 0x00007f8cb7422c29 in PolkitQt1::Agent::Session::~Session() () from /usr/lib/libpolkit-qt-agent-1.so.0
#12 0x00007f8cb69b7f58 in QObject::event (this=0x2790520, e=<value optimized out>) at kernel/qobject.cpp:1202
#13 0x00007f8cb5d52b04 in QApplicationPrivate::notify_helper (this=0x2646ed0, receiver=0x2790520, e=0x27780a0) at kernel/qapplication.cpp:4445
#14 0x00007f8cb5d5743a in QApplication::notify (this=<value optimized out>, receiver=0x2790520, e=0x27780a0) at kernel/qapplication.cpp:4324
#15 0x00007f8cb7a79906 in KApplication::notify (this=0x7fffc7d84dc0, receiver=0x2790520, event=0x27780a0) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007f8cb69a3f7c in QCoreApplication::notifyInternal (this=0x7fffc7d84dc0, receiver=0x2790520, event=0x27780a0) at kernel/qcoreapplication.cpp:732
#17 0x00007f8cb69a7715 in sendEvent (receiver=0x0, event_type=52, data=0x2614a30) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x2614a30) at kernel/qcoreapplication.cpp:1373
#19 0x00007f8cb69a79fe in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1016
#20 0x000000000040a563 in _start ()

Reported using DrKonqi