Application: digikam5 (5.5.0)

Qt Version: 5.6.1
Frameworks Version: 5.26.0
Operating System: Linux 4.8.0-45-generic x86_64
Distribution: Ubuntu 16.10

-- Information about the crash:
- What I was doing when the application crashed:
Only started the application; it has just been updated to 5.5 via the ubuntu sources

The crash can be reproduced every time.

-- Backtrace:
Application: digiKam (digikam5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7fb24dbd2b80 (LWP 5025))]

Thread 29 (Thread 0x7fb1b8bf1700 (LWP 5096)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305db2b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb284e86d74 in Digikam::ActionThreadBase::run (this=0x55687b8c9240) at ./core/libs/threads/actionthreadbase.cpp:229
#3  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb27f17b6ca in start_thread (arg=0x7fb1b8bf1700) at pthread_create.c:333
#5  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 28 (Thread 0x7fb1ba3f4700 (LWP 5094)):
[KCrash Handler]
#6  Digikam::Haar::ImageData::fillPixelData (this=0x7fb23c0d7920, im=...) at ./core/libs/database/haar/haar.cpp:114
#7  0x00007fb282d1c01c in Digikam::HaarIface::bestMatchesForImageWithThreshold (this=this@entry=0x7fb1ba3f3810, imagePath=..., requiredPercentage=requiredPercentage@entry=0.90000000000000002, maximumPercentage=maximumPercentage@entry=1, searchResultRestriction=searchResultRestriction@entry=Digikam::HaarIface::None, type=Digikam::HaarIface::ScannedSketch) at ./core/libs/database/haar/haariface.cpp:443
#8  0x00007fb282ccecf0 in Digikam::ImageLister::listHaarSearch (this=this@entry=0x7fb1ba3f3950, receiver=receiver@entry=0x7fb1ba3f39a0, xml=...) at ./core/libs/database/item/imagelister.cpp:849
#9  0x00007fb282ca8920 in Digikam::SearchesJob::run (this=0x55685d86fb00) at ./core/libs/database/dbjobs/dbjob.cpp:262
#10 0x00007fb283058f6f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fb27f17b6ca in start_thread (arg=0x7fb1ba3f4700) at pthread_create.c:333
#13 0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 27 (Thread 0x7fb1bcff7700 (LWP 5053)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb277064da3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fb277385591 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fb27f17b6ca in start_thread (arg=0x7fb1bcff7700) at pthread_create.c:333
#4  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 26 (Thread 0x7fb1bd7f8700 (LWP 5052)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb277063d74 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fb277385591 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fb27f17b6ca in start_thread (arg=0x7fb1bd7f8700) at pthread_create.c:333
#4  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 25 (Thread 0x7fb1bdff9700 (LWP 5051)):
#0  0x00007fb283054d99 in QMutex::unlock() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fb283289b51 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb27a248ed9 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb27a2498fb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb27a249aec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb28328a4ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2832320fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb283057d43 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb27f17b6ca in start_thread (arg=0x7fb1bdff9700) at pthread_create.c:333
#10 0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 24 (Thread 0x7fb1be7fa700 (LWP 5050)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb1be7fa700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 23 (Thread 0x7fb1beffb700 (LWP 5049)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb1beffb700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 22 (Thread 0x7fb1bf7fc700 (LWP 5048)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb1bf7fc700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 21 (Thread 0x7fb1bfffd700 (LWP 5047)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb1bfffd700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 20 (Thread 0x7fb20cff9700 (LWP 5046)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb20cff9700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 19 (Thread 0x7fb20d7fa700 (LWP 5045)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb20d7fa700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 18 (Thread 0x7fb20dffb700 (LWP 5044)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb27735596b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#2  0x00007fb2773559a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#3  0x00007fb27f17b6ca in start_thread (arg=0x7fb20dffb700) at pthread_create.c:333
#4  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 17 (Thread 0x7fb20e7fc700 (LWP 5043)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb20e7fc700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 16 (Thread 0x7fb20effd700 (LWP 5042)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb20effd700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 15 (Thread 0x7fb20f7fe700 (LWP 5041)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb20f7fe700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 14 (Thread 0x7fb20ffff700 (LWP 5040)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb20ffff700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 13 (Thread 0x7fb22cff9700 (LWP 5039)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb22cff9700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 12 (Thread 0x7fb22d7fa700 (LWP 5038)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb22d7fa700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 11 (Thread 0x7fb22dffb700 (LWP 5037)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb22dffb700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 10 (Thread 0x7fb22e7fc700 (LWP 5036)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb22e7fc700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7fb22effd700 (LWP 5035)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb22effd700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7fb22f7fe700 (LWP 5034)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb22f7fe700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7fb22ffff700 (LWP 5033)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb22ffff700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7fb238b4d700 (LWP 5032)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305dd6b in QWaitCondition::wait(QReadWriteLock*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb280443f8b in QtAV::BlockingQueue<QRunnable*, QQueue>::take() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#3  0x00007fb2804aee68 in QtAV::ExtractThread::run() () from /usr/lib/x86_64-linux-gnu/libQtAV.so.1
#4  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb27f17b6ca in start_thread (arg=0x7fb238b4d700) at pthread_create.c:333
#6  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7fb248c88700 (LWP 5031)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305db2b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb284e88042 in Digikam::ParkingThread::run (this=0x55685b9549d0) at ./core/libs/threads/threadmanager.cpp:115
#3  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb27f17b6ca in start_thread (arg=0x7fb248c88700) at pthread_create.c:333
#5  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7fb249489700 (LWP 5029)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305db2b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb285aef3aa in Digikam::ScanController::run (this=0x7fb28640ac80 <_ZZN7Digikam12_GLOBAL__N_113Q_QGS_creator13innerFunctionEvE6holder>) at ./core/libs/database/utils/scancontroller.cpp:677
#3  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb27f17b6ca in start_thread (arg=0x7fb249489700) at pthread_create.c:333
#5  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7fb24a790700 (LWP 5028)):
#0  0x00007fb282366c8d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb27a28dc80 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb27a249485 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb27a249974 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb27a249aec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb28328a4ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2832320fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb283057d43 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb2864b9575 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fb28305cc68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fb27f17b6ca in start_thread (arg=0x7fb24a790700) at pthread_create.c:333
#11 0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fb24dbad700 (LWP 5026)):
#0  0x00007fb28236b0bd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2554f364c in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007fb27f17b6ca in start_thread (arg=0x7fb24dbad700) at pthread_create.c:333
#3  0x00007fb2823770af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fb24dbd2b80 (LWP 5025)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb28305db2b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb2830588f2 in QThreadPoolPrivate::waitForDone(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fb283058b51 in QThreadPool::waitForDone(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb284e86432 in Digikam::ActionThreadBase::~ActionThreadBase (this=0x55687b25d220, __in_chrg=<optimized out>) at ./core/libs/threads/actionthreadbase.cpp:103
#5  0x00007fb282ca4f79 in Digikam::DatesDBJobsThread::~DatesDBJobsThread (this=0x55687b25d220, __in_chrg=<optimized out>) at ./core/libs/database/dbjobs/dbjobsthread.cpp:149
#6  0x00007fb283260051 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb28326927f in QObject::~QObject() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb282cafaf7 in Digikam::DBJobsManager::~DBJobsManager (this=<optimized out>, __in_chrg=<optimized out>) at ./core/libs/database/dbjobs/dbjobsmanager.h:40
#9  Digikam::DBJobsManagerCreator::~DBJobsManagerCreator (this=<optimized out>, __in_chrg=<optimized out>) at ./core/libs/database/dbjobs/dbjobsmanager.cpp:31
#10 Digikam::(anonymous namespace)::Q_QGS_creator::Holder::~Holder (this=<optimized out>, __in_chrg=<optimized out>) at ./core/libs/database/dbjobs/dbjobsmanager.cpp:38
#11 0x00007fb2822a92e0 in __run_exit_handlers (status=1, listp=0x7fb2826305d8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at exit.c:83
#12 0x00007fb2822a933a in __GI_exit (status=<optimized out>) at exit.c:105
#13 0x00007fb27d840aa5 in _XDefaultIOError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#14 0x00007fb24ce58b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#15 0x00007fb27d840cce in _XIOError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#16 0x00007fb27d83df92 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#17 0x00007fb27d83e7c9 in _XFlush () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#18 0x00007fb27d841365 in _XGetRequest () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#19 0x00007fb27d81c45a in XCreateColormap () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#20 0x00007fb24ce77561 in QXcbWindow::create() () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#21 0x00007fb24ce62fd1 in QXcbIntegration::createPlatformWindow(QWindow*) const () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#22 0x00007fb2835911bc in QWindowPrivate::create(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#23 0x00007fb283ba9254 in QWidgetPrivate::create_sys(unsigned long long, bool, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007fb283ba890d in QWidget::create(unsigned long long, bool, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fb283ba8d0c in QWidgetPrivate::createWinId() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fb283ba855d in QWidget::setAttribute(Qt::WidgetAttribute, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fb283ba8346 in QWidget::setAttribute(Qt::WidgetAttribute, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fb283ba8c16 in QWidgetPrivate::createWinId() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fb283ba855d in QWidget::setAttribute(Qt::WidgetAttribute, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007fb283ba8346 in QWidget::setAttribute(Qt::WidgetAttribute, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007fb283ba8c16 in QWidgetPrivate::createWinId() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007fb283ba855d in QWidget::setAttribute(Qt::WidgetAttribute, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007fb283ba8346 in QWidget::setAttribute(Qt::WidgetAttribute, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007fb283ba8c16 in QWidgetPrivate::createWinId() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007fb283ba8b95 in QWidget::create(unsigned long long, bool, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007fb283bab3a6 in QWidget::raise() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007fb283d3f0fb in QAbstractScrollAreaPrivate::layoutChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#38 0x00007fb283e205c6 in QTreeView::updateGeometries() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#39 0x00007fb283dd405d in QAbstractItemView::doItemsLayout() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#40 0x00007fb283e1eb69 in QTreeView::doItemsLayout() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007fb283e15435 in QTreeView::collapseAll() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007fb285e0452c in Digikam::VersionsWidget::applyViewMode (this=this@entry=0x55685c9947a0) at ./core/libs/widgets/imagehistory/versionswidget.cpp:262
#43 0x00007fb285e04792 in Digikam::VersionsWidget::slotViewModeChanged (mode=<optimized out>, this=0x55685c9947a0) at ./core/libs/widgets/imagehistory/versionswidget.cpp:249
#44 Digikam::VersionsWidget::readSettings (this=0x55685c9947a0, group=...) at ./core/libs/widgets/imagehistory/versionswidget.cpp:178
#45 0x00007fb285c21f4d in Digikam::ImagePropertiesVersionsTab::readSettings (this=0x55685c992720, group=...) at ./core/libs/imageproperties/imagepropertiesversionstab.cpp:105
#46 0x00007fb285c2a7fc in Digikam::ImagePropertiesSideBarDB::doLoadState (this=0x55685c67f810) at ./core/libs/imageproperties/imagepropertiessidebardb.cpp:681
#47 0x00007fb284f0a85d in Digikam::StateSavingObject::loadState (this=0x55685c67f848) at ./core/libs/widgets/common/statesavingobject.cpp:184
#48 0x00007fb285beae42 in Digikam::DigikamView::slotAllAlbumsLoaded (this=0x55685b8f4fa0) at ./core/app/views/digikamview.cpp:944
#49 0x00007fb285c01c69 in Digikam::DigikamView::qt_static_metacall (_o=0x55685b8f4fa0, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./obj-x86_64-linux-gnu/core/app/moc_digikamview.cpp:652
#50 0x00007fb283261b49 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x00007fb285d49661 in Digikam::AlbumManager::startScan (this=0x7fb28640b740 <_ZZN7Digikam12_GLOBAL__N_113Q_QGS_creator13innerFunctionEvE6holder>) at ./core/libs/album/albummanager.cpp:1090
#52 0x00007fb285b3c064 in Digikam::DigikamApp::DigikamApp (this=0x55685b9b60f0, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ./core/app/main/digikamapp.cpp:262
#53 0x000055685a89ec0d in main (argc=<optimized out>, argv=<optimized out>) at ./core/app/main/main.cpp:201

Reported using DrKonqi