Application: digikam (4.12.0)
KDE Platform Version: 4.14.13
Qt Version: 4.8.6
Operating System: Linux 4.2.0-34-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
I tried to use align_image_stack/enfuse to create hdr images.
(In the german menu thats Extras-> Bilder aus Belichtugsreihe mischen).
Either after the dialog  with checking "Bilder aus Belichtungsreihe ausrichten" (align Pictures) or if unchecking the alignment and clicking the Preview Button on the next Dialog, Digikam crashes.

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 0x7ffb772beb40 (LWP 2319))]

Thread 15 (Thread 0x7ffb4bb79700 (LWP 2321)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffb7107b286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x29ce570) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x29ce4b0, mutex=mutex@entry=0x29ce4a8, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000000005fffb4 in Digikam::ScanController::run (this=0x2921350) at /build/digikam-131Z2v/digikam-4.12.0/core/app/database/scancontroller.cpp:725
#4  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x2921350) at thread/qthread_unix.cpp:349
#5  0x00007ffb6da2d6aa in start_thread (arg=0x7ffb4bb79700) at pthread_create.c:333
#6  0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7ffb4b378700 (LWP 2322)):
#0  0x00007ffb69fc521e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffb69fc7b4a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb69fc8190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffb3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb4b377a40, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb4b377a40, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007ffb710784f9 in QThread::exec (this=this@entry=0x29d1580) at thread/qthread.cpp:538
#8  0x00007ffb71169133 in QInotifyFileSystemWatcherEngine::run (this=0x29d1580) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x29d1580) at thread/qthread_unix.cpp:349
#10 0x00007ffb6da2d6aa in start_thread (arg=0x7ffb4b378700) at pthread_create.c:333
#11 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7ffb4ab77700 (LWP 2324)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffb7107b286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x2d9ee70) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2d9e470, mutex=mutex@entry=0x2d9e468, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007ffb753f8f02 in Digikam::ParkingThread::run (this=0x2d9e450) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:119
#4  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x2d9e450) at thread/qthread_unix.cpp:349
#5  0x00007ffb6da2d6aa in start_thread (arg=0x7ffb4ab77700) at pthread_create.c:333
#6  0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7ffb38c4a700 (LWP 2325)):
#0  0x00007ffe32388949 in ?? ()
#1  0x00007ffe32388c75 in clock_gettime ()
#2  0x00007ffb7052f33d in __GI___clock_gettime (clock_id=clock_id@entry=1, tp=tp@entry=0x7ffb38c497a0) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007ffb710d5565 in do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:127
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:144
#5  0x00007ffb711bc0a5 in QTimerInfoList::updateCurrentTime (this=0x7ffb34002ee0) at kernel/qeventdispatcher_unix.cpp:354
#6  QTimerInfoList::timerWait (this=0x7ffb34002ee0, tm=...) at kernel/qeventdispatcher_unix.cpp:460
#7  0x00007ffb711ba8dc in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7ffb38c49874) at kernel/qeventdispatcher_glib.cpp:143
#8  0x00007ffb711ba9a5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:176
#9  0x00007ffb69fc777d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007ffb69fc811b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffb340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#13 0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb38c49a40, flags=...) at kernel/qeventloop.cpp:149
#14 0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb38c49a40, flags=...) at kernel/qeventloop.cpp:204
#15 0x00007ffb710784f9 in QThread::exec (this=this@entry=0x2f3d740) at thread/qthread.cpp:538
#16 0x00007ffb71169133 in QInotifyFileSystemWatcherEngine::run (this=0x2f3d740) at io/qfilesystemwatcher_inotify.cpp:265
#17 0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x2f3d740) at thread/qthread_unix.cpp:349
#18 0x00007ffb6da2d6aa in start_thread (arg=0x7ffb38c4a700) at pthread_create.c:333
#19 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7ffb0f7fe700 (LWP 2574)):
#0  0x00007ffb7051588d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffb69fc81ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffaf80a44c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb0f7fda20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb0f7fda20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007ffb753f84f3 in Digikam::WorkerObjectRunnable::run (this=0x77a1b60) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007ffb7106ddba in QThreadPoolThread::run (this=0x43ec780) at concurrent/qthreadpool.cpp:108
#8  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x43ec780) at thread/qthread_unix.cpp:349
#9  0x00007ffb6da2d6aa in start_thread (arg=0x7ffb0f7fe700) at pthread_create.c:333
#10 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7ffb0d7fa700 (LWP 2585)):
#0  0x00007ffb6a00c884 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffb69fc7a59 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb69fc8167 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffaec01ffb0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb0d7f9a20, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb0d7f9a20, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007ffb753f84f3 in Digikam::WorkerObjectRunnable::run (this=0x84deef0) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:196
#8  0x00007ffb7106ddba in QThreadPoolThread::run (this=0x43e24f0) at concurrent/qthreadpool.cpp:108
#9  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x43e24f0) at thread/qthread_unix.cpp:349
#10 0x00007ffb6da2d6aa in start_thread (arg=0x7ffb0d7fa700) at pthread_create.c:333
#11 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7ffb257e3700 (LWP 2602)):
#0  0x00007ffb69fc7a69 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffb69fc8167 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffb180711f0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb257e2a20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb257e2a20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007ffb753f84f3 in Digikam::WorkerObjectRunnable::run (this=0x773be30) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007ffb7106ddba in QThreadPoolThread::run (this=0x43e2e80) at concurrent/qthreadpool.cpp:108
#8  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x43e2e80) at thread/qthread_unix.cpp:349
#9  0x00007ffb6da2d6aa in start_thread (arg=0x7ffb257e3700) at pthread_create.c:333
#10 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7ffb24fe2700 (LWP 2716)):
#0  0x00007ffb69fc522c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffb69fc7b4a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb69fc8190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffab00182e0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb24fe1a20, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb24fe1a20, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007ffb753f84f3 in Digikam::WorkerObjectRunnable::run (this=0x2f084d0) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:196
#8  0x00007ffb7106ddba in QThreadPoolThread::run (this=0x43ec170) at concurrent/qthreadpool.cpp:108
#9  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x43ec170) at thread/qthread_unix.cpp:349
#10 0x00007ffb6da2d6aa in start_thread (arg=0x7ffb24fe2700) at pthread_create.c:333
#11 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7ffb0ffff700 (LWP 3136)):
#0  0x00007ffb7051144d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffb6a00b4e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb69fc7cd4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb69fc8190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffaac002560, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#6  0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb0fffea20, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb0fffea20, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007ffb753f84f3 in Digikam::WorkerObjectRunnable::run (this=0x2a88820) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:196
#9  0x00007ffb7106ddba in QThreadPoolThread::run (this=0x43eed30) at concurrent/qthreadpool.cpp:108
#10 0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x43eed30) at thread/qthread_unix.cpp:349
#11 0x00007ffb6da2d6aa in start_thread (arg=0x7ffb0ffff700) at pthread_create.c:333
#12 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7ffb0e7fc700 (LWP 3294)):
#0  0x00007ffb69fc5227 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffb69fc7b4a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb69fc8190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffb711bb20e in QEventDispatcherGlib::processEvents (this=0x7ffb04052520, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffb0e7fba20, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffb0e7fba20, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007ffb753f84f3 in Digikam::WorkerObjectRunnable::run (this=0x8c42cf0) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:196
#8  0x00007ffb7106ddba in QThreadPoolThread::run (this=0x43eda20) at concurrent/qthreadpool.cpp:108
#9  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x43eda20) at thread/qthread_unix.cpp:349
#10 0x00007ffb6da2d6aa in start_thread (arg=0x7ffb0e7fc700) at pthread_create.c:333
#11 0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7ffb26077700 (LWP 3352)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffb7107b286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x4371850) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x436f360, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007ffb7686ba54 in KDcrawIface::RActionThreadBase::run() () from /usr/lib/libkdcraw.so.23
#4  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x4371540) at thread/qthread_unix.cpp:349
#5  0x00007ffb6da2d6aa in start_thread (arg=0x7ffb26077700) at pthread_create.c:333
#6  0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7ffaf376b700 (LWP 3353)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffb7107b286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x47bc040) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x47bb278, mutex=0x47d4a60, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007ffb7401acfc in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x47bb250, th=0x7ffab80010e0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007ffb7401da03 in ThreadWeaver::WorkingHardState::applyForWork (this=0x46a71b0, th=0x7ffab80010e0, previous=0x86590f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007ffb7401c55f in ThreadWeaver::Thread::run (this=0x7ffab80010e0) at ../../../threadweaver/Weaver/Thread.cpp:98
#6  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x7ffab80010e0) at thread/qthread_unix.cpp:349
#7  0x00007ffb6da2d6aa in start_thread (arg=0x7ffaf376b700) at pthread_create.c:333
#8  0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7ffaf1f68700 (LWP 3373)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffb7107b286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x8daef00) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x8daefa0, mutex=mutex@entry=0x8daef98, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007ffae41187f8 in KIPIPlugins::KPRawThumbThread::run (this=0x939d3d0) at /build/digikam-131Z2v/digikam-4.12.0/extra/kipi-plugins/common/libkipiplugins/tools/kprawthumbthread.cpp:108
#4  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x939d3d0) at thread/qthread_unix.cpp:349
#5  0x00007ffb6da2d6aa in start_thread (arg=0x7ffaf1f68700) at pthread_create.c:333
#6  0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7ffaf1767700 (LWP 3374)):
#0  0x00007ffb705176f3 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffb711b7eff in qt_safe_select (nfds=11, fdread=0x7ffaf1766400, fdwrite=0x7ffaf1766480, fdexcept=fdexcept@entry=0x0, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:79
#2  0x00007ffb71161c0a in select_msecs (nfds=<optimized out>, fdread=<optimized out>, fdwrite=<optimized out>, timeout=<optimized out>) at io/qprocess_unix.cpp:1041
#3  0x00007ffb711639bf in QProcessPrivate::waitForFinished (this=this@entry=0x7ffae801c5c0, msecs=msecs@entry=-1) at io/qprocess_unix.cpp:1262
#4  0x00007ffb71114c7f in QProcess::waitForFinished (this=<optimized out>, msecs=msecs@entry=-1) at io/qprocess.cpp:1780
#5  0x00007ffadc08c2ea in KIPIExpoBlendingPlugin::ActionThread::startPreProcessing (this=this@entry=0x8a82a60, inUrls=..., align=<optimized out>, settings=..., alignPath=..., errors=...) at /build/digikam-131Z2v/digikam-4.12.0/extra/kipi-plugins/expoblending/manager/actionthread.cpp:588
#6  0x00007ffadc0905fd in KIPIExpoBlendingPlugin::ActionThread::run (this=0x8a82a60) at /build/digikam-131Z2v/digikam-4.12.0/extra/kipi-plugins/expoblending/manager/actionthread.cpp:336
#7  0x00007ffb7107ad1c in QThreadPrivate::start (arg=0x8a82a60) at thread/qthread_unix.cpp:349
#8  0x00007ffb6da2d6aa in start_thread (arg=0x7ffaf1767700) at pthread_create.c:333
#9  0x00007ffb70520e9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ffb772beb40 (LWP 2319)):
[KCrash Handler]
#6  QPixmapData::isNull (this=<optimized out>) at image/qpixmapdata_p.h:131
#7  QPixmap::isNull (this=this@entry=0x81ff558) at image/qpixmap.cpp:579
#8  0x00007ffb71ebc96b in QPixmap::copy (this=this@entry=0x81ff558, rect=...) at image/qpixmap.cpp:382
#9  0x00007ffb71ebd6bf in QPixmap::QPixmap (this=0x7ffe322879f0, pixmap=...) at image/qpixmap.cpp:303
#10 0x00007ffb72bc2f38 in KPixmapSequence::frameAt (this=0x865fea8, index=1) at ../../kdeui/util/kpixmapsequence.cpp:143
#11 0x00007ffadc095b9b in KIPIExpoBlendingPlugin::PreProcessingPage::slotProgressTimerDone (this=0x854c120) at /build/digikam-131Z2v/digikam-4.12.0/extra/kipi-plugins/expoblending/importwizard/preprocessingpage.cpp:210
#12 0x00007ffadc096fed in KIPIExpoBlendingPlugin::PreProcessingPage::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /build/digikam-131Z2v/digikam-4.12.0/obj-x86_64-linux-gnu/extra/kipi-plugins/expoblending/preprocessingpage.moc:58
#13 0x00007ffb7119ef60 in QMetaObject::activate (sender=0x8a918b0, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3567
#14 0x00007ffb711a4bd3 in QObject::event (this=0x8a918b0, e=<optimized out>) at kernel/qobject.cpp:1253
#15 0x00007ffb71ddfcdc in QApplicationPrivate::notify_helper (this=this@entry=0x2864ec0, receiver=receiver@entry=0x8a918b0, e=e@entry=0x7ffe32287e60) at kernel/qapplication.cpp:4570
#16 0x00007ffb71de6c16 in QApplication::notify (this=this@entry=0x7ffe32288580, receiver=receiver@entry=0x8a918b0, e=e@entry=0x7ffe32287e60) at kernel/qapplication.cpp:4356
#17 0x00007ffb72b42a2a in KApplication::notify (this=0x7ffe32288580, receiver=0x8a918b0, event=0x7ffe32287e60) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007ffb7118a85d in QCoreApplication::notifyInternal (this=0x7ffe32288580, receiver=0x8a918b0, event=event@entry=0x7ffe32287e60) at kernel/qcoreapplication.cpp:955
#19 0x00007ffb711bd6c0 in QCoreApplication::sendEvent (event=0x7ffe32287e60, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#20 QTimerInfoList::activateTimers (this=0x2875350) at kernel/qeventdispatcher_unix.cpp:621
#21 0x00007ffb711ba869 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:193
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:240
#23 0x00007ffb69fc7ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ffb69fc8250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007ffb69fc82fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007ffb711bb1ee in QEventDispatcherGlib::processEvents (this=0x27d5450, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#27 0x00007ffb71e8ac26 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007ffb711890d1 in QEventLoop::processEvents (this=this@entry=0x7ffe322880e0, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007ffb71189445 in QEventLoop::exec (this=this@entry=0x7ffe322880e0, flags=...) at kernel/qeventloop.cpp:204
#30 0x00007ffb7118f429 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#31 0x00007ffb71dddf2c in QApplication::exec () at kernel/qapplication.cpp:3828
#32 0x0000000000492eae in main (argc=<optimized out>, argv=<optimized out>) at /build/digikam-131Z2v/digikam-4.12.0/core/app/main/main.cpp:230

Possible duplicates by query: bug 358424, bug 357149, bug 355154, bug 354364.

Reported using DrKonqi