Application: digikam (4.12.0)
KDE Platform Version: 4.14.13
Qt Version: 4.8.6
Operating System: Linux 4.2.0-17-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
I was exporting a selection of photos (with the rating filter enabled) to Facebook; after doing the Facebook login and writing in the album details, it started the exportation (the progress bar appeared) and immediately crashed.

-- 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 0x7fc14ce11b40 (LWP 3185))]

Thread 9 (Thread 0x7fc128202700 (LWP 3188)):
#0  0x00007fc1460768dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc13223312c in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007fc14358d6aa in start_thread (arg=0x7fc128202700) at pthread_create.c:333
#3  0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fc121afd700 (LWP 3189)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fc146bdc286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x2306b20) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2306a30, mutex=mutex@entry=0x2306a28, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000000005fffb4 in Digikam::ScanController::run (this=0x23067a0) at /build/digikam-131Z2v/digikam-4.12.0/core/app/database/scancontroller.cpp:725
#4  0x00007fc146bdbd1c in QThreadPrivate::start (arg=0x23067a0) at thread/qthread_unix.cpp:349
#5  0x00007fc14358d6aa in start_thread (arg=0x7fc121afd700) at pthread_create.c:333
#6  0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fc1212fc700 (LWP 3190)):
#0  0x00007fc1460768dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc13fb281ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc13fb282fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc146d1c20e in QEventDispatcherGlib::processEvents (this=0x7fc1140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007fc146cea0d1 in QEventLoop::processEvents (this=this@entry=0x7fc1212fba40, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc146cea445 in QEventLoop::exec (this=this@entry=0x7fc1212fba40, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fc146bd94f9 in QThread::exec (this=this@entry=0x2308e20) at thread/qthread.cpp:538
#7  0x00007fc146cca133 in QInotifyFileSystemWatcherEngine::run (this=0x2308e20) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007fc146bdbd1c in QThreadPrivate::start (arg=0x2308e20) at thread/qthread_unix.cpp:349
#9  0x00007fc14358d6aa in start_thread (arg=0x7fc1212fc700) at pthread_create.c:333
#10 0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fc120afb700 (LWP 3203)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fc146bdc286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x23d3bf0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2292750, mutex=mutex@entry=0x2292748, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007fc14af59f02 in Digikam::ParkingThread::run (this=0x2292730) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:119
#4  0x00007fc146bdbd1c in QThreadPrivate::start (arg=0x2292730) at thread/qthread_unix.cpp:349
#5  0x00007fc14358d6aa in start_thread (arg=0x7fc120afb700) at pthread_create.c:333
#6  0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fc112c76700 (LWP 3204)):
#0  0x00007fc1460768dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc13fb281ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc13fb282fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc146d1c20e in QEventDispatcherGlib::processEvents (this=0x7fc10c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007fc146cea0d1 in QEventLoop::processEvents (this=this@entry=0x7fc112c75a40, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc146cea445 in QEventLoop::exec (this=this@entry=0x7fc112c75a40, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fc146bd94f9 in QThread::exec (this=this@entry=0x2907580) at thread/qthread.cpp:538
#7  0x00007fc146cca133 in QInotifyFileSystemWatcherEngine::run (this=0x2907580) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007fc146bdbd1c in QThreadPrivate::start (arg=0x2907580) at thread/qthread_unix.cpp:349
#9  0x00007fc14358d6aa in start_thread (arg=0x7fc112c76700) at pthread_create.c:333
#10 0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fc111a65700 (LWP 3207)):
#0  0x00007fc146078743 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc146cc651f in QProcessManager::run (this=0x7fc147052540 <processManager()::processManager>) at io/qprocess_unix.cpp:270
#2  0x00007fc146bdbd1c in QThreadPrivate::start (arg=0x7fc147052540 <processManager()::processManager>) at thread/qthread_unix.cpp:349
#3  0x00007fc14358d6aa in start_thread (arg=0x7fc111a65700) at pthread_create.c:333
#4  0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fc0fe7fb700 (LWP 3225)):
#0  0x00007fc1460768dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc13fb281ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc13fb282fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc146d1c1ee in QEventDispatcherGlib::processEvents (this=0x7fc0dc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#4  0x00007fc146cea0d1 in QEventLoop::processEvents (this=this@entry=0x7fc0fe7faa20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc146cea445 in QEventLoop::exec (this=this@entry=0x7fc0fe7faa20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fc14af594f3 in Digikam::WorkerObjectRunnable::run (this=0x6389a00) at /build/digikam-131Z2v/digikam-4.12.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007fc146bcedba in QThreadPoolThread::run (this=0x4224e20) at concurrent/qthreadpool.cpp:108
#8  0x00007fc146bdbd1c in QThreadPrivate::start (arg=0x4224e20) at thread/qthread_unix.cpp:349
#9  0x00007fc14358d6aa in start_thread (arg=0x7fc0fe7fb700) at pthread_create.c:333
#10 0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fc0feffc700 (LWP 3353)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fc146bdc286 in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x7724b50) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x7723d40, mutex=mutex@entry=0x7723d38, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007fc09add17f8 in KIPIPlugins::KPRawThumbThread::run (this=0x77241c0) at /build/digikam-131Z2v/digikam-4.12.0/extra/kipi-plugins/common/libkipiplugins/tools/kprawthumbthread.cpp:108
#4  0x00007fc146bdbd1c in QThreadPrivate::start (arg=0x77241c0) at thread/qthread_unix.cpp:349
#5  0x00007fc14358d6aa in start_thread (arg=0x7fc0feffc700) at pthread_create.c:333
#6  0x00007fc146081eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fc14ce11b40 (LWP 3185)):
[KCrash Handler]
#6  QPixmapData::isNull (this=<optimized out>) at image/qpixmapdata_p.h:131
#7  QPixmap::isNull (this=this@entry=0x7736908) at image/qpixmap.cpp:579
#8  0x00007fc147a1d96b in QPixmap::copy (this=this@entry=0x7736908, rect=...) at image/qpixmap.cpp:382
#9  0x00007fc147a1e6bf in QPixmap::QPixmap (this=0x7ffcb849c040, pixmap=...) at image/qpixmap.cpp:303
#10 0x00007fc148723f38 in KPixmapSequence::frameAt (this=0x76f7648, index=1) at ../../kdeui/util/kpixmapsequence.cpp:143
#11 0x00007fc09ade3261 in KIPIPlugins::KPImagesList::slotProgressTimerDone (this=0x631b930) at /build/digikam-131Z2v/digikam-4.12.0/extra/kipi-plugins/common/libkipiplugins/widgets/kpimageslist.cpp:1146
#12 0x00007fc146cfff60 in QMetaObject::activate (sender=0x773d590, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3567
#13 0x00007fc146d05bd3 in QObject::event (this=0x773d590, e=<optimized out>) at kernel/qobject.cpp:1253
#14 0x00007fc147940cdc in QApplicationPrivate::notify_helper (this=this@entry=0x210e570, receiver=receiver@entry=0x773d590, e=e@entry=0x7ffcb849c4b0) at kernel/qapplication.cpp:4570
#15 0x00007fc147947c16 in QApplication::notify (this=this@entry=0x7ffcb849cbd0, receiver=receiver@entry=0x773d590, e=e@entry=0x7ffcb849c4b0) at kernel/qapplication.cpp:4356
#16 0x00007fc1486a3a2a in KApplication::notify (this=0x7ffcb849cbd0, receiver=0x773d590, event=0x7ffcb849c4b0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007fc146ceb85d in QCoreApplication::notifyInternal (this=0x7ffcb849cbd0, receiver=0x773d590, event=event@entry=0x7ffcb849c4b0) at kernel/qcoreapplication.cpp:955
#18 0x00007fc146d1e6c0 in QCoreApplication::sendEvent (event=0x7ffcb849c4b0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QTimerInfoList::activateTimers (this=0x2107710) at kernel/qeventdispatcher_unix.cpp:621
#20 0x00007fc146d1b869 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:193
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:240
#22 0x00007fc13fb27ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fc13fb28250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fc13fb282fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fc146d1c1ee in QEventDispatcherGlib::processEvents (this=0x20662f0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#26 0x00007fc1479ebc26 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007fc146cea0d1 in QEventLoop::processEvents (this=this@entry=0x7ffcb849c730, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007fc146cea445 in QEventLoop::exec (this=this@entry=0x7ffcb849c730, flags=...) at kernel/qeventloop.cpp:204
#29 0x00007fc146cf0429 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#30 0x00007fc14793ef2c in QApplication::exec () at kernel/qapplication.cpp:3828
#31 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 354364.

Reported using DrKonqi