Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.4 (4.8.4)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-29-generic-pae i686
Distribution: Ubuntu 12.04.1 LTS

-- Information about the crash:
just before shutting down i was browsing with firefox and downloading some files with Ktorrent

The crash can be reproduced every time.

-- Backtrace:
Application: Κέλυφος επιφάνειας εργασίας (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xafe82a40 (LWP 2139))]

Thread 4 (Thread 0xa7ff5b40 (LWP 2140)):
#0  0xb2c233f6 in g_mutex_unlock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb2be3c78 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb2be4125 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2be4201 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb64898e7 in QEventDispatcherGlib::processEvents (this=0xa7600480, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0xb645550d in QEventLoop::processEvents (this=0xa7ff5190, flags=...) at kernel/qeventloop.cpp:149
#6  0xb64557a9 in QEventLoop::exec (this=0xa7ff5190, flags=...) at kernel/qeventloop.cpp:204
#7  0xb633e94c in QThread::exec (this=0x99c8258) at thread/qthread.cpp:501
#8  0xb6432b5d in QInotifyFileSystemWatcherEngine::run (this=0x99c8258) at io/qfilesystemwatcher_inotify.cpp:248
#9  0xb6341de0 in QThreadPrivate::start (arg=0x99c8258) at thread/qthread_unix.cpp:298
#10 0xb2329a11 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x5c8b0824 in ?? ()
#12 0xbab80424 in ?? ()
#13 0x65000000 in ?? ()
#14 0x001015ff in ?? ()
#15 0xd3890000 in ?? ()
#16 0xfff0013d in ?? ()
#17 0xc30173ff in ?? ()
#18 0x0f8122e8 in ?? ()
#19 0x9fc18100 in ?? ()
#20 0x8b001724 in ?? ()
#21 0xffff0889 in ?? ()
#22 0x29d231ff in ?? ()
#23 0x0d0365c2 in ?? ()
#24 0x00000000 in ?? ()

Thread 3 (Thread 0xa6f2fb40 (LWP 2141)):
#0  0xb77be424 in __kernel_vsyscall ()
#1  0xb2cfb712 in __lll_unlock_wake () from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb2cf7d27 in _L_unlock_622 () from /lib/i386-linux-gnu/libpthread.so.0
#3  0xb2cf7c6a in __pthread_mutex_unlock_usercnt () from /lib/i386-linux-gnu/libpthread.so.0
#4  0xb767b634 in pthread_mutex_unlock () from /lib/i386-linux-gnu/libc.so.6
#5  0xb2322cbf in ?? () from /usr/lib/nvidia-current/libGL.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 2 (Thread 0xa540bb40 (LWP 2144)):
#0  0xb77be424 in __kernel_vsyscall ()
#1  0xb2cf896b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb767b3dc in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0xb3cb7029 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb3cb706f in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb2329a11 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#6  0x5c8b0824 in ?? ()
#7  0xbab80424 in ?? ()
#8  0x65000000 in ?? ()
#9  0x001015ff in ?? ()
#10 0xd3890000 in ?? ()
#11 0xfff0013d in ?? ()
#12 0xc30173ff in ?? ()
#13 0x0f8122e8 in ?? ()
#14 0x9fc18100 in ?? ()
#15 0x8b001724 in ?? ()
#16 0xffff0889 in ?? ()
#17 0x29d231ff in ?? ()
#18 0x0d0365c2 in ?? ()
#19 0x00000000 in ?? ()

Thread 1 (Thread 0xafe82a40 (LWP 2139)):
[KCrash Handler]
#7  0xb5b7003b in QRasterWindowSurface::~QRasterWindowSurface (this=0xa204868, __in_chrg=<optimized out>) at painting/qwindowsurface_raster.cpp:117
#8  0xb5b700d2 in QRasterWindowSurface::~QRasterWindowSurface (this=0xa204868, __in_chrg=<optimized out>) at painting/qwindowsurface_raster.cpp:121
#9  0xb5b8b424 in QWidgetBackingStore::~QWidgetBackingStore (this=0xa205008, __in_chrg=<optimized out>) at painting/qbackingstore.cpp:909
#10 0xb5993cec in QWidgetBackingStoreTracker::destroy (this=0xa204f90) at kernel/qwidget.cpp:217
#11 0xb5993e48 in QWidgetPrivate::deleteExtra (this=0x988ea90) at kernel/qwidget.cpp:1830
#12 0xb599405c in QWidgetPrivate::~QWidgetPrivate (this=0x988ea90, __in_chrg=<optimized out>) at kernel/qwidget.cpp:357
#13 0xb5994372 in QWidgetPrivate::~QWidgetPrivate (this=0x988ea90, __in_chrg=<optimized out>) at kernel/qwidget.cpp:362
#14 0xb64714bb in cleanup (pointer=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:62
#15 ~QScopedPointer (this=0x98d3144, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#16 QObject::~QObject (this=0x98d3140, __in_chrg=<optimized out>) at kernel/qobject.cpp:817
#17 0xb599622d in QWidget::~QWidget (this=0x98d3140, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1551
#18 0xb5996482 in QWidget::~QWidget (this=0x98d3140, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1700
#19 0xb5fb2948 in QGlobalStaticDeleter<QWidget>::~QGlobalStaticDeleter (this=0xb62d90f0, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1923
#20 0xb75b5f61 in ?? () from /lib/i386-linux-gnu/libc.so.6
#21 0xb75b5fed in exit () from /lib/i386-linux-gnu/libc.so.6
#22 0xb759c4db in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
#23 0x08048531 in _start ()

This bug may be a duplicate of or related to bug 297684.

Possible duplicates by query: bug 297684, bug 295018, bug 294270, bug 294229, bug 294100.

Reported using DrKonqi