https://bugs.kde.org/show_bug.cgi?id=399923

--- Comment #156 from timo...@zoho.com ---
I can still reproduce this (or at least some segfault during face dection) with
current master (33d0457e20adda97c003f3dee652a1749406ff9f):

> digikam.facesengine: detectMultiScale: image size ( 480 , 800 ) 
> searchIncrement 1.1 grouping 3 flags 1 min size ( 24 , 24 )
> digikam.metaengine: Exif color-space tag is sRGB. Using default sRGB ICC 
> profile.
> digikam.dimg: 
> "/home/timo/tmp/deletable-pics/Android/Whatsapp/IMG-20130807-WA0006.jpg"  : 
> JPEG file identified
> digikam.dimg: 
> "/home/timo/tmp/deletable-pics/Android/Whatsapp/IMG-20130809-WA0000.jpg"  : 
> JPEG file identified
> digikam.metaengine: Exif color-space tag is sRGB. Using default sRGB ICC 
> profile.
> digikam.facesengine: detectMultiScale gave ()
> digikam.general: Found 0 faces in "IMG-20130705-WA0000.jpg" QSize(480, 800) 
> QSize(480, 800)
> digikam.facesengine: detectMultiScale: image size ( 800 , 600 ) 
> searchIncrement 1.1 grouping 3 flags 1 min size ( 24 , 24 )
> digikam.dimg: "/home/timo/tmp/deletable-pics/P/G/IMG_1683.JPG"  : JPEG file 
> identified
> digikam.general: Check for finish:  51 packages, 0 infos to filter, 
> hasFinished() false
> digikam.general: Using  4  CPU core to run threads
> [New Thread 0x7ffeebfff700 (LWP 15844)]
> digikam.general: Action Thread run  1  new jobs
> [New Thread 0x7fff23ffe700 (LWP 15845)]
> digikam.database: " ( ( (ImageTagProperties.tagid=? OR 
> ImageTagProperties.tagid IN (SELECT id FROM TagsTree WHERE pid=?)) AND 
> ImageTagProperties.property=?  ) OR ( (ImageTagProperties.tagid=? OR 
> ImageTagProperties.tagid IN (SELECT id FROM TagsTree WHERE pid=?)) AND 
> ImageTagProperties.property=?  ) OR ( (ImageTagProperties.tagid=? OR 
> ImageTagProperties.tagid IN (SELECT id FROM TagsTree WHERE pid=?)) AND 
> ImageTagProperties.property=?  ) ) "
> digikam.database: Search query:
>  "SELECT DISTINCT Images.id, Images.name, Images.album,        
> Albums.albumRoot,        ImageInformation.rating, Images.category,        
> ImageInformation.format, ImageInformation.creationDate,        
> Images.modificationDate, Images.fileSize,        ImageInformation.width,  
> ImageInformation.height,        ImageTagProperties.value, 
> ImageTagProperties.property, ImageTagProperties.tagid  FROM Images        
> INNER JOIN ImageTagProperties ON ImageTagProperties.imageid=Images.id        
> LEFT JOIN ImageInformation ON Images.id=ImageInformation.imageid        INNER 
> JOIN Albums           ON Albums.id=Images.album WHERE Images.status=1 AND (  
> ( ( (ImageTagProperties.tagid=? OR ImageTagProperties.tagid IN (SELECT id 
> FROM TagsTree WHERE pid=?)) AND ImageTagProperties.property=?  ) OR ( 
> (ImageTagProperties.tagid=? OR ImageTagProperties.tagid IN (SELECT id FROM 
> TagsTree WHERE pid=?)) AND ImageTagProperties.property=?  ) OR ( 
> (ImageTagProperties.tagid=? OR ImageTagProperties.tagid IN (SELECT id FROM 
> TagsTree WHERE pid=?)) AND ImageTagProperties.property=?  ) )  );" 
>  (QVariant(int, 281), QVariant(int, 281), QVariant(QString, 
> "autodetectedPerson"), QVariant(int, 281), QVariant(int, 281), 
> QVariant(QString, "autodetectedFace"), QVariant(int, 281), QVariant(int, 
> 281), QVariant(QString, "tagRegion"))
> digikam.general: Check for finish:  51 packages, 0 infos to filter, 
> hasFinished() false
> corrupted size vs. prev_size
> digikam.database: Search result: 3031
> digikam.general: Removing old entries ()
> 
> Thread 48 "Thread (pooled)" received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7fff3491f700 (LWP 18350)]
> 0x00007fffef39672a in operator==(QString const&, QString const&) ()
>    from 
> /nix/store/683732s7dq6bxrl267lcadl5lvn6i4nh-qtbase-5.12.0/lib/libQt5Core.so.5
> (gdb) bt
> #0  0x00007fffef39672a in operator==(QString const&, QString const&) ()
>    from 
> /nix/store/683732s7dq6bxrl267lcadl5lvn6i4nh-qtbase-5.12.0/lib/libQt5Core.so.5
> #1  0x00007ffff6f5a575 in 
> Digikam::LoadingDescription::equalsIgnoreReducedVersion (this=<optimized 
> out>, other=...)
>     at 
> /home/timo/tmp/source/core/libs/threadimageio/fileio/loadingdescription.cpp:313
> #2  0x00007ffff6f65f43 in Digikam::SharedLoadingTask::notifyNewLoadingProcess 
> (this=0x2edc370, process=<optimized out>, 
>     description=...) at 
> /home/timo/tmp/source/core/libs/threadimageio/fileio/loadsavetask.cpp:429
> #3  0x00007ffff6f5bcb0 in Digikam::LoadingCache::notifyNewLoadingProcess 
> (this=this@entry=0x5e59e0, 
>     process=process@entry=0x3a9ef60, description=...) at 
> /home/timo/tmp/source/core/libs/threadimageio/fileio/loadingcache.cpp:240
> #4  0x00007ffff6f416c4 in Digikam::PreviewLoadingTask::execute 
> (this=0x3a9ed90)
>     at 
> /home/timo/tmp/source/core/libs/threadimageio/preview/previewtask.cpp:149
> #5  0x00007ffff6f58cde in Digikam::LoadSaveThread::run (this=0x6e416d0)
>     at 
> /home/timo/tmp/source/core/libs/threadimageio/fileio/loadsavethread.cpp:133
> #6  0x00007ffff6f79ffe in Digikam::DynamicThread::Private::run 
> (this=0x6d497c0)
>     at /home/timo/tmp/source/core/libs/threads/dynamicthread.cpp:183
> #7  0x00007fffef3127d2 in ?? () from 
> /nix/store/683732s7dq6bxrl267lcadl5lvn6i4nh-qtbase-5.12.0/lib/libQt5Core.so.5
> #8  0x00007fffef30e062 in ?? () from 
> /nix/store/683732s7dq6bxrl267lcadl5lvn6i4nh-qtbase-5.12.0/lib/libQt5Core.so.5
> #9  0x00007ffff64e1ef7 in start_thread () from 
> /nix/store/iykxb0bmfjmi7s53kfg6pjbfpd8jmza6-glibc-2.27/lib/libpthread.so.0
> #10 0x00007fffed6eb22f in clone () from 
> /nix/store/iykxb0bmfjmi7s53kfg6pjbfpd8jmza6-glibc-2.27/lib/libc.so.6
> (gdb)

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