Application: showfoto (2.8.0)
KDE Platform Version: 4.9.4
Qt Version: 4.8.3
Operating System: Linux 3.5.0-23-generic i686
Distribution: Ubuntu 12.10

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

i used color effects and crashes 2 times my digiKam. 
I use gnome but digiKam is the best program for edit the pictures

The crash can be reproduced every time.

-- Backtrace:
Application: showFoto (showfoto), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb167e740 (LWP 13935))]

Thread 4 (Thread 0xae9ffb40 (LWP 13939)):
#0  0xb77d8424 in __kernel_vsyscall ()
#1  0xb579c5f0 in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb465474b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb4645d00 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb46461db in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xafd00b7a in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb466b303 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb5084d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0xb57aad3e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 3 (Thread 0xac067b40 (LWP 13944)):
#0  0xb4686ed2 in g_mutex_lock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb4645cb0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb4645e61 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb5b4599f in QEventDispatcherGlib::processEvents (this=0xa0c2000, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0xb5b1226c in QEventLoop::processEvents (this=this@entry=0xac067228, flags=...) at kernel/qeventloop.cpp:149
#5  0xb5b12561 in QEventLoop::exec (this=0xac067228, flags=...) at kernel/qeventloop.cpp:204
#6  0xb59fd66c in QThread::exec (this=0xa0d5e10) at thread/qthread.cpp:501
#7  0xb5af07bd in QInotifyFileSystemWatcherEngine::run (this=0xa0d5e10) at io/qfilesystemwatcher_inotify.cpp:248
#8  0xb5a00a58 in QThreadPrivate::start (arg=0xa0d5e10) at thread/qthread_unix.cpp:338
#9  0xb5084d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#10 0xb57aad3e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xab866b40 (LWP 13949)):
[KCrash Handler]
#7  0xb742c99b in Digikam::ImageHistogram::calculate() () from /usr/lib/libdigikamcore.so.2
#8  0xb742c64d in Digikam::ImageHistogram::run() () from /usr/lib/libdigikamcore.so.2
#9  0xb753cfd6 in Digikam::DynamicThread::DynamicThreadPriv::run() () from /usr/lib/libdigikamcore.so.2
#10 0xb59f3444 in QThreadPoolThread::run (this=0x9dfa1a8) at concurrent/qthreadpool.cpp:107
#11 0xb5a00a58 in QThreadPrivate::start (arg=0x9dfa1a8) at thread/qthread_unix.cpp:338
#12 0xb5084d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#13 0xb57aad3e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb167e740 (LWP 13935)):
#0  0xb77d8424 in __kernel_vsyscall ()
#1  0xb508896b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0xb57b864c in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0xb5a01030 in wait (time=4294967295, this=0x9ba12a8) at thread/qwaitcondition_unix.cpp:86
#4  QWaitCondition::wait (this=0x9ba1208, mutex=0x9ba11f4, time=4294967295) at thread/qwaitcondition_unix.cpp:158
#5  0xb59f2c73 in QThreadPoolPrivate::waitForDone (this=0x9ba11a8, msecs=msecs@entry=-1) at concurrent/qthreadpool.cpp:298
#6  0xb59f46fc in QThreadPool::~QThreadPool (this=0x9b7b440, __in_chrg=<optimized out>) at concurrent/qthreadpool.cpp:440
#7  0xb59f4762 in QThreadPool::~QThreadPool (this=0x9b7b440, __in_chrg=<optimized out>) at concurrent/qthreadpool.cpp:442
#8  0xb5b27a59 in QObjectPrivate::deleteChildren (this=this@entry=0x9ba0e90) at kernel/qobject.cpp:1908
#9  0xb5b2cf8c in QObject::~QObject (this=0x9b74040, __in_chrg=<optimized out>) at kernel/qobject.cpp:927
#10 0xb753a919 in Digikam::ThreadManager::~ThreadManager() () from /usr/lib/libdigikamcore.so.2
#11 0xb753b1b3 in Digikam::ThreadManagerCreator::~ThreadManagerCreator() () from /usr/lib/libdigikamcore.so.2
#12 0xb753a7b8 in Digikam::._158::destroy () from /usr/lib/libdigikamcore.so.2
#13 0xb73586dd in KCleanUpGlobalStatic::~KCleanUpGlobalStatic() () from /usr/lib/libdigikamcore.so.2
#14 0xb56eef51 in ?? () from /lib/i386-linux-gnu/libc.so.6
#15 0xb56eefdd in exit () from /lib/i386-linux-gnu/libc.so.6
#16 0xaf7579c3 in ?? () from /usr/lib/i386-linux-gnu/libgdk-x11-2.0.so.0
#17 0xb6bf3a69 in KApplication::xioErrhandler (this=0xbff8cc84, dpy=dpy@entry=0x99c4fd0) at ../../kdeui/kernel/kapplication.cpp:419
#18 0xb6bf3aa4 in kde_xio_errhandler (dpy=0x99c4fd0) at ../../kdeui/kernel/kapplication.cpp:126
#19 0xb4f2cb84 in _XIOError () from /usr/lib/i386-linux-gnu/libX11.so.6
#20 0xb4f2a95e in _XReply () from /usr/lib/i386-linux-gnu/libX11.so.6
#21 0xb4f25ccb in XSync () from /usr/lib/i386-linux-gnu/libX11.so.6
#22 0xb62ad08e in syncX (this=0x9b949e0) at painting/qwindowsurface_raster.cpp:134
#23 QRasterWindowSurface::syncX (this=0x9b949e0) at painting/qwindowsurface_raster.cpp:130
#24 0xb62ad5be in QRasterWindowSurface::beginPaint (this=0x9b949e0, rgn=...) at painting/qwindowsurface_raster.cpp:143
#25 0xb62c6f91 in QWidgetBackingStore::beginPaint (this=0x9b7bc50, toClean=..., widget=0x9b71050, windowSurface=0x9b949e0, returnInfo=0xbff8c154, toCleanIsInTopLevelCoordinates=true) at painting/qbackingstore.cpp:379
#26 0xb62cd12e in QWidgetBackingStore::sync (this=0x9b7bc50) at painting/qbackingstore.cpp:1304
#27 0xb60c9a4b in QWidgetPrivate::syncBackingStore (this=0x9b71220) at kernel/qwidget.cpp:1892
#28 0xb60daad1 in QWidget::event (this=0x9b71050, event=0xa3dc390) at kernel/qwidget.cpp:8664
#29 0xb650805c in QMainWindow::event (this=0x9b71050, event=0xa3dc390) at widgets/qmainwindow.cpp:1478
#30 0xb6cca284 in KMainWindow::event (this=0x9b71050, ev=0xa3dc390) at ../../kdeui/widgets/kmainwindow.cpp:1084
#31 0xb6d112d2 in KXmlGuiWindow::event (this=0x9b71050, ev=0xa3dc390) at ../../kdeui/xmlgui/kxmlguiwindow.cpp:126
#32 0xb608139c in QApplicationPrivate::notify_helper (this=0x99a8288, receiver=0x9b71050, e=0xa3dc390) at kernel/qapplication.cpp:4562
#33 0xb6085e54 in QApplication::notify (this=0x99a8288, receiver=0x9b71050, e=0xa3dc390) at kernel/qapplication.cpp:4423
#34 0xb6bf4e91 in KApplication::notify (this=0xbff8cc84, receiver=0x9b71050, event=0xa3dc390) at ../../kdeui/kernel/kapplication.cpp:311
#35 0xb5b1378e in QCoreApplication::notifyInternal (this=0xbff8cc84, receiver=0x9b71050, event=0xa3dc390) at kernel/qcoreapplication.cpp:915
#36 0xb5b1797d in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#37 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x995f130) at kernel/qcoreapplication.cpp:1539
#38 0xb5b17c0c in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1432
#39 0xb5b45804 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#40 postEventSourceDispatch (s=0x99a9180) at kernel/qeventdispatcher_glib.cpp:279
#41 0xb46459e3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#42 0xb4645d80 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#43 0xb4645e61 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#44 0xb5b45981 in QEventDispatcherGlib::processEvents (this=0x995feb8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#45 0xb61379aa in QGuiEventDispatcherGlib::processEvents (this=0x995feb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#46 0xb5b1226c in QEventLoop::processEvents (this=this@entry=0xbff8cb88, flags=...) at kernel/qeventloop.cpp:149
#47 0xb5b12561 in QEventLoop::exec (this=0xbff8cb88, flags=...) at kernel/qeventloop.cpp:204
#48 0xb5b17cba in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#49 0xb607efc4 in QApplication::exec () at kernel/qapplication.cpp:3823
#50 0x0806b69e in main ()

Reported using DrKonqi