Application: digikam (4.12.0)
KDE Platform Version: 4.14.13
Qt Version: 4.8.6
Operating System: Linux 4.2.0-23-generic x86_64
Distribution: Ubuntu 15.10

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

I selected the 5 files, started exposure fusion. Launched alignment. When I clicked on preview, digikam crashed.

The crash can be reproduced every time.

-- Backtrace:
Application: digiKam (digikam), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f096258ab40 (LWP 17956))]

Thread 9 (Thread 0x7f093ee64700 (LWP 17957)):
#0  0x00007f095b7ca8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0948e9112c in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007f0958ce16aa in start_thread (arg=0x7f093ee64700) at pthread_create.c:333
#3  0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f093ab13700 (LWP 17958)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f095c330286 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00000000005fffb4 in ?? ()
#3  0x00007f095c32fd1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f0958ce16aa in start_thread (arg=0x7f093ab13700) at pthread_create.c:333
#5  0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f093a312700 (LWP 17959)):
#0  0x00007f095535b884 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f0955316d8a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0955317250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f09553172fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f095c47020e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007f095c43e0d1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007f095c43e445 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007f095c32d4f9 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007f095c41e133 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007f095c32fd1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007f0958ce16aa in start_thread (arg=0x7f093a312700) at pthread_create.c:333
#11 0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f0939b11700 (LWP 17961)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f095c330286 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007f09606adf02 in ?? () from /usr/lib/digikam/libdigikamcore.so.4.12.0
#3  0x00007f095c32fd1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f0958ce16aa in start_thread (arg=0x7f0939b11700) at pthread_create.c:333
#5  0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f092bdae700 (LWP 17963)):
#0  0x00007f095b7c649d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f095535a4e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0955316cd4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0955317190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f09553172fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f095c47020e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007f095c43e0d1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007f095c43e445 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007f095c32d4f9 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007f095c41e133 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007f095c32fd1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x00007f0958ce16aa in start_thread (arg=0x7f092bdae700) at pthread_create.c:333
#12 0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f091ef4f700 (LWP 18039)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f095c330286 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007f08fc5cc7f8 in KIPIPlugins::KPRawThumbThread::run() () from /usr/lib/digikam/libkipiplugins.so.4.12.0
#3  0x00007f095c32fd1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f0958ce16aa in start_thread (arg=0x7f091ef4f700) at pthread_create.c:333
#5  0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f091d314700 (LWP 18040)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f095c330286 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007f08e8b29de7 in ?? () from /usr/lib/kde4/kipiplugin_expoblending.so
#3  0x00007f095c32fd1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f0958ce16aa in start_thread (arg=0x7f091d314700) at pthread_create.c:333
#5  0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f090cff9700 (LWP 18063)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f095c330286 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2  0x00007f08fc5cc7f8 in KIPIPlugins::KPRawThumbThread::run() () from /usr/lib/digikam/libkipiplugins.so.4.12.0
#3  0x00007f095c32fd1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f0958ce16aa in start_thread (arg=0x7f090cff9700) at pthread_create.c:333
#5  0x00007f095b7d5eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f096258ab40 (LWP 17956)):
[KCrash Handler]
#6  0x00007f095d170b39 in QPixmap::isNull() const () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007f095d17196b in QPixmap::copy(QRect const&) const () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#8  0x00007f095d1726bf in QPixmap::QPixmap(QPixmap const&) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#9  0x00007f095de77f38 in KPixmapSequence::frameAt(int) const () from /usr/lib/libkdeui.so.5
#10 0x00007f08fc5e60cc in KIPIPlugins::KPPreviewManager::slotProgressTimerDone() () from /usr/lib/digikam/libkipiplugins.so.4.12.0
#11 0x00007f095c453f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#12 0x00007f095c459bd3 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#13 0x00007f095d094cdc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#14 0x00007f095d09bc16 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007f095ddf7a2a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#16 0x00007f095c43f85d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#17 0x00007f095c4726c0 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#18 0x00007f095c46f869 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#19 0x00007f0955316ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f0955317250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f09553172fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f095c4701ee in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#23 0x00007f095d13fc26 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#24 0x00007f095c43e0d1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#25 0x00007f095c43e445 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#26 0x00007f095c444429 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#27 0x0000000000492eae in ?? ()
#28 0x00007f095b6efa40 in __libc_start_main (main=0x491c20, argc=5, argv=0x7fff37cfc628, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff37cfc618) at libc-start.c:289
#29 0x0000000000495de9 in _start ()

Possible duplicates by query: bug 357149, bug 355744, bug 355154, bug 354364, bug 320747.

Reported using DrKonqi