https://bugs.kde.org/show_bug.cgi?id=397919

--- Comment #30 from Mathieu <mathieu.b...@free.fr> ---
Test:
- without CM
- with multi-core
unfortunately, it crashes

igikam::OpenCVFaceDetector::cascadeResult: detectMultiScale gave  ()
Digikam::OpenCVFaceDetector::verifyFace: Verifying face  QRect(228,134 36x36) 
using cascade  8
Digikam::OpenCVFaceDetector::verifyFace: feature  QRectF(0.1,0.4 0.8x0.6)
QRect(228,134 36x36) QRect(232,148 29x22)
Digikam::OpenCVFaceDetector::cascadeResult: detectMultiScale: image size  29  
22  searchIncrement  1.1  grouping  2  flags  0  min size  4   4 

Digikam::OpenCVFaceDetector::cascadeResult: detectMultiScale gave  ()
Digikam::DetectionWorker::process: Found 0 faces in "2003-06-28_000000 - Divers
( (001).jpg" QSize(1917, 1242) QSize(1917, 1242)
Digikam::FaceUtils::writeUnconfirmedResults: Entry QRect(319,150
164x164)53overlapsQRect(319,150 164x164)603, skipping
Digikam::DImg::copy:  : return null image! ( false ,  0 ,  0 )
Digikam::FaceUtils::writeUnconfirmedResults: Entry QRect(314,128
209x209)37overlapsQRect(312,123 223x223)603, skipping
Digikam::DImg::copy:  : return null image! ( false ,  0 ,  0 )
[New Thread 0x7fff48ff9700 (LWP 17775)]
[Thread 0x7fff48ff9700 (LWP 17744) exited]

Thread 102 "Thread (pooled)" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff497fa700 (LWP 17274)]
0x00007ffff630b50e in
QSharedDataPointer<Digikam::MetaEngineData::Private>::operator= (o=...,
this=0x38471e0)
    at ././/include/QtCore/qshareddata.h:99
99      ././/include/QtCore/qshareddata.h: Aucun fichier ou dossier de ce type.
(gdb) bt
#0  0x00007ffff630b50e in
QSharedDataPointer<Digikam::MetaEngineData::Private>::operator= (o=..., 
    this=0x38471e0) at ././/include/QtCore/qshareddata.h:99
#1  Digikam::MetaEngineData::operator= (this=0x38471e0, other=...)
    at /b/dktemp/digikam-master/core/libs/dmetadata/metaengine_data.cpp:51
#2  0x00007ffff62d72fc in Digikam::DImg::setMetadata (this=<optimized out>,
data=...)
    at /b/dktemp/digikam-master/core/libs/dimg/dimg.cpp:1016
#3  0x00007ffff6180a91 in Digikam::DImgLoader::readMetadata
(this=0x7fff497f9880, filePath=...)
    at /b/dktemp/digikam-master/core/libs/dimg/loaders/dimgloader.cpp:219
#4  0x00007ffff618a10e in Digikam::JPEGLoader::load
(this=this@entry=0x7fff497f9880, filePath=..., 
    observer=observer@entry=0x3b0f240) at
/b/dktemp/digikam-master/core/libs/dimg/loaders/jpegloader.cpp:92
#5  0x00007ffff62dfb29 in Digikam::DImg::load (this=this@entry=0x3b0f428,
filePath=..., 
    loadFlagsInt=loadFlagsInt@entry=63, observer=observer@entry=0x3b0f240,
rawDecodingSettings=...)
    at /b/dktemp/digikam-master/core/libs/dimg/dimg.cpp:430
#6  0x00007ffff62e00a0 in Digikam::DImg::load (this=this@entry=0x3b0f428,
filePath=..., 
    observer=observer@entry=0x3b0f240, rawDecodingSettings=...)
    at /b/dktemp/digikam-master/core/libs/dimg/dimg.cpp:374
#7  0x00007ffff63a353b in Digikam::PreviewLoadingTask::execute (this=0x3b0f230)
    at /b/dktemp/digikam-master/core/libs/threadimageio/previewtask.cpp:325
#8  0x00007ffff638f145 in Digikam::LoadSaveThread::run (this=0x33d7850)
    at /b/dktemp/digikam-master/core/libs/threadimageio/loadsavethread.cpp:133
#9  0x00007ffff63d0fce in Digikam::DynamicThread::Private::run (this=0x633fe50)
    at /b/dktemp/digikam-master/core/libs/threads/dynamicthread.cpp:183
#10 0x000000347b8aa60f in ?? () from
/tmp/.mount_digikasSydoJ/usr/lib/libQt5Core.so.5
#11 0x000000347b8ae18a in ?? () from
/tmp/.mount_digikasSydoJ/usr/lib/libQt5Core.so.5
#12 0x00007ffff570a494 in start_thread (arg=0x7fff497fa700) at
pthread_create.c:333
#13 0x00007fffed3f8acf in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:97

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