Bug 321851

Summary: Face scan crash but only on multithread
Product: [Applications] digikam Reporter: katarzyna.matylla
Component: Faces-EngineAssignee: Digikam Developers <digikam-bugs-null>
Status: RESOLVED FIXED    
Severity: crash CC: caulier.gilles
Priority: NOR    
Version: 3.1.0   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In: 7.0.0

Description katarzyna.matylla 2013-07-02 05:47:03 UTC 
Application: digikam (3.1.0)
KDE Platform Version: 4.10.4
Qt Version: 4.8.4
Operating System: Linux 3.8.0-25-generic x86_64
Distribution: Ubuntu 13.04

-- Information about the crash:
Scanning faces and maybe I clicked it more than one time. After that I run face scan in background (=one core only) and it didn't crash. I don't use KDE, I use Unity, but I don't think it's related. Also, I have rather many photos, tens thousands of them.

-- 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 0x7f687731fa40 (LWP 2843))]

Thread 16 (Thread 0x7f684ef18700 (LWP 2965)):
#0  0x00007f6869946359 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f68699465b9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6869906493 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6869907188 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f68699076ba in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f685e9144f6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f686992aeb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f686c0a7f8e in start_thread (arg=0x7f684ef18700) at pthread_create.c:311
#8  0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 15 (Thread 0x7f68462d8700 (LWP 2966)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6871b7b14b in wait (time=18446744073709551615, this=0x1805380) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x1805280, mutex=mutex@entry=0x1805278, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000000005ccce8 in Digikam::ScanController::run (this=0x1805080) at /build/buildd/digikam-3.1.0/core/digikam/database/scancontroller.cpp:705
#4  0x00007f6871b7abec in QThreadPrivate::start (arg=0x1805080) at thread/qthread_unix.cpp:338
#5  0x00007f686c0a7f8e in start_thread (arg=0x7f68462d8700) at pthread_create.c:311
#6  0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 14 (Thread 0x7f6845ad7700 (LWP 2967)):
#0  0x00007f686c0aa075 in __GI___pthread_mutex_lock (mutex=0x7f6834000a60) at pthread_mutex_lock.c:95
#1  0x00007f68699465c1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6869907190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6871ca6036 in QEventDispatcherGlib::processEvents (this=0x7f68340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7f6845ad6b10, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7f6845ad6b10, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f6871b78410 in QThread::exec (this=this@entry=0x17f6410) at thread/qthread.cpp:542
#8  0x00007f6871c57edf in QInotifyFileSystemWatcherEngine::run (this=0x17f6410) at io/qfilesystemwatcher_inotify.cpp:256
#9  0x00007f6871b7abec in QThreadPrivate::start (arg=0x17f6410) at thread/qthread_unix.cpp:338
#10 0x00007f686c0a7f8e in start_thread (arg=0x7f6845ad7700) at pthread_create.c:311
#11 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 13 (Thread 0x7f684f719700 (LWP 3201)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6871b7b14b in wait (time=18446744073709551615, this=0x1ca6a90) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x1ca6e70, mutex=mutex@entry=0x1ca6e68, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f6874bc60a9 in Digikam::ParkingThread::run (this=0x1ca6e50) at /build/buildd/digikam-3.1.0/core/libs/threads/threadmanager.cpp:119
#4  0x00007f6871b7abec in QThreadPrivate::start (arg=0x1ca6e50) at thread/qthread_unix.cpp:338
#5  0x00007f686c0a7f8e in start_thread (arg=0x7f684f719700) at pthread_create.c:311
#6  0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 12 (Thread 0x7f67b27fc700 (LWP 3401)):
#0  0x00007f686c0ab07f in __pthread_mutex_unlock_usercnt (mutex=0x7f67d0002830, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  0x00007f68699465f1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f68699068f3 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f68699070fe in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6871ca6036 in QEventDispatcherGlib::processEvents (this=0x7f67d0012e50, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7f67b27fbb10, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7f67b27fbb10, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f6871b78410 in QThread::exec (this=this@entry=0x620fe80) at thread/qthread.cpp:542
#9  0x00007f6871c57edf in QInotifyFileSystemWatcherEngine::run (this=0x620fe80) at io/qfilesystemwatcher_inotify.cpp:256
#10 0x00007f6871b7abec in QThreadPrivate::start (arg=0x620fe80) at thread/qthread_unix.cpp:338
#11 0x00007f686c0a7f8e in start_thread (arg=0x7f67b27fc700) at pthread_create.c:311
#12 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 11 (Thread 0x7f67d8ff9700 (LWP 3519)):
#0  0x00007f6869906980 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f68699070fe in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6871ca6036 in QEventDispatcherGlib::processEvents (this=0x7f67c0032830, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7f67d8ff8ae0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7f67d8ff8ae0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6874bc564b in Digikam::WorkerObjectRunnable::run (this=0x964fe90) at /build/buildd/digikam-3.1.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007f6871b6e55d in QThreadPoolThread::run (this=0x2eeeea0) at concurrent/qthreadpool.cpp:107
#8  0x00007f6871b7abec in QThreadPrivate::start (arg=0x2eeeea0) at thread/qthread_unix.cpp:338
#9  0x00007f686c0a7f8e in start_thread (arg=0x7f67d8ff9700) at pthread_create.c:311
#10 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 10 (Thread 0x7f682a2dc700 (LWP 3545)):
#0  0x00007f6870da60a4 in pthread_mutex_lock (mutex=0x7f67b402ce50) at forward.c:192
#1  0x00007f68699465c1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f686990634e in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f68699070b4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6871ca6036 in QEventDispatcherGlib::processEvents (this=0x7f67b402e0a0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7f682a2dbae0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7f682a2dbae0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f6874bc564b in Digikam::WorkerObjectRunnable::run (this=0x588d840) at /build/buildd/digikam-3.1.0/core/libs/threads/threadmanager.cpp:196
#9  0x00007f6871b6e55d in QThreadPoolThread::run (this=0x2fcfdb0) at concurrent/qthreadpool.cpp:107
#10 0x00007f6871b7abec in QThreadPrivate::start (arg=0x2fcfdb0) at thread/qthread_unix.cpp:338
#11 0x00007f686c0a7f8e in start_thread (arg=0x7f682a2dc700) at pthread_create.c:311
#12 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 9 (Thread 0x7f6823fff700 (LWP 3546)):
#0  0x00007f6870d8b3cd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f68699071dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6871ca6036 in QEventDispatcherGlib::processEvents (this=0x7f67c8020dc0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7f6823ffeae0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7f6823ffeae0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6874bc564b in Digikam::WorkerObjectRunnable::run (this=0x5ab8360) at /build/buildd/digikam-3.1.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007f6871b6e55d in QThreadPoolThread::run (this=0x2fcf420) at concurrent/qthreadpool.cpp:107
#8  0x00007f6871b7abec in QThreadPrivate::start (arg=0x2fcf420) at thread/qthread_unix.cpp:338
#9  0x00007f686c0a7f8e in start_thread (arg=0x7f6823fff700) at pthread_create.c:311
#10 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 8 (Thread 0x7f68235bc700 (LWP 3547)):
#0  0x00007f686c0aa075 in __GI___pthread_mutex_lock (mutex=0x7f67c0025680) at pthread_mutex_lock.c:95
#1  0x00007f68699465c1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6869906c74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6869907175 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6871ca6036 in QEventDispatcherGlib::processEvents (this=0x7f67c0040bd0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7f68235bbae0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7f68235bbae0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f6874bc564b in Digikam::WorkerObjectRunnable::run (this=0x5ab26d0) at /build/buildd/digikam-3.1.0/core/libs/threads/threadmanager.cpp:196
#9  0x00007f6871b6e55d in QThreadPoolThread::run (this=0x2fce730) at concurrent/qthreadpool.cpp:107
#10 0x00007f6871b7abec in QThreadPrivate::start (arg=0x2fce730) at thread/qthread_unix.cpp:338
#11 0x00007f686c0a7f8e in start_thread (arg=0x7f68235bc700) at pthread_create.c:311
#12 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 7 (Thread 0x7f6822dbb700 (LWP 3548)):
#0  0x00007f6872717edc in QImage::height (this=0x7f67bc0b4ec8) at image/qimage.cpp:1545
#1  0x00007f68727182dd in QImage::pixelIndex (this=0x7f67bc0b4ec8, x=x@entry=57, y=y@entry=3) at image/qimage.cpp:4095
#2  0x00007f68475d6b55 in XCFImageFormat::mergeRGBToRGB (layer=..., i=i@entry=13, j=j@entry=27, k=k@entry=57, l=l@entry=3, image=..., m=m@entry=889, n=1731) at ../../kimgio/xcf.cpp:1874
#3  0x00007f68475d4690 in XCFImageFormat::mergeLayerIntoImage (xcf_image=...) at ../../kimgio/xcf.cpp:1560
#4  0x00007f68475da168 in XCFImageFormat::loadLayer (this=this@entry=0x7f6822db9def, xcf_io=..., xcf_image=...) at ../../kimgio/xcf.cpp:404
#5  0x00007f68475dab08 in XCFImageFormat::readXCF (this=this@entry=0x7f6822db9def, device=<optimized out>, outImage=outImage@entry=0x7f6822db9e90) at ../../kimgio/xcf.cpp:159
#6  0x00007f68475daefd in XCFHandler::read (this=<optimized out>, image=0x7f6822db9e90) at ../../kimgio/xcf.cpp:2384
#7  0x00007f6872728f0d in QImageReader::read (this=this@entry=0x7f6822db9ef0, image=image@entry=0x7f6822db9e90) at image/qimagereader.cpp:1205
#8  0x00007f687272945f in QImageReader::read (this=this@entry=0x7f6822db9ef0) at image/qimagereader.cpp:1155
#9  0x00007f687271d9d1 in QImage::load (this=this@entry=0x7f6822dba030, fileName=..., format=format@entry=0x0) at image/qimage.cpp:5094
#10 0x00007f687271db95 in QImage::QImage (this=0x7f6822dba030, fileName=..., format=0x0) at image/qimage.cpp:995
#11 0x00007f6874a1a1d9 in Digikam::QImageLoader::load (this=this@entry=0x7f6822dba340, filePath=..., observer=observer@entry=0x8060ec0) at /build/buildd/digikam-3.1.0/core/libs/dimg/loaders/qimageloader.cpp:55
#12 0x00007f68749edf9c in Digikam::DImg::load (this=this@entry=0x7f6822dba4e0, filePath=..., loadFlagsInt=13, observer=observer@entry=0x8060ec0, rawDecodingSettings=...) at /build/buildd/digikam-3.1.0/core/libs/dimg/dimg.cpp:558
#13 0x00007f68749ef35a in Digikam::DImg::load (this=this@entry=0x7f6822dba4e0, filePath=..., loadMetadata=loadMetadata@entry=false, loadICCData=<optimized out>, loadUniqueHash=loadUniqueHash@entry=false, loadImageHistory=loadImageHistory@entry=false, observer=0x8060ec0, rawDecodingSettings=...) at /build/buildd/digikam-3.1.0/core/libs/dimg/dimg.cpp:403
#14 0x00007f6874baef2e in Digikam::ThumbnailCreator::loadWithDImg (this=this@entry=0x1e2a170, path=..., profile=profile@entry=0x7f6822dba5a0) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailcreator.cpp:561
#15 0x00007f6874bb3312 in Digikam::ThumbnailCreator::createThumbnail (this=this@entry=0x1e2a170, info=..., detailRect=..., isFace=isFace@entry=false) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailcreator.cpp:520
#16 0x00007f6874bb3ff3 in Digikam::ThumbnailCreator::load (this=0x1e2a170, path=..., rect=..., pregenerate=pregenerate@entry=true) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailcreator.cpp:260
#17 0x00007f6874bb535c in Digikam::ThumbnailCreator::pregenerate (this=<optimized out>, path=...) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailcreator.cpp:183
#18 0x00007f6874bc19c0 in Digikam::ThumbnailLoadingTask::execute (this=0x8060eb0) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailtask.cpp:82
#19 0x00007f6874b9b5ae in Digikam::LoadSaveThread::run (this=0x1d13e70) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/loadsavethread.cpp:136
#20 0x00007f6874bc80de in Digikam::DynamicThread::DynamicThreadPriv::run (this=0x1e63a50) at /build/buildd/digikam-3.1.0/core/libs/threads/dynamicthread.cpp:186
#21 0x00007f6871b6e55d in QThreadPoolThread::run (this=0x2fcb880) at concurrent/qthreadpool.cpp:107
#22 0x00007f6871b7abec in QThreadPrivate::start (arg=0x2fcb880) at thread/qthread_unix.cpp:338
#23 0x00007f686c0a7f8e in start_thread (arg=0x7f6822dbb700) at pthread_create.c:311
#24 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 6 (Thread 0x7f6821db9700 (LWP 3549)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f68670d1293 in ?? () from /usr/lib/libtbb.so.2
#2  0x00007f68670d12c9 in ?? () from /usr/lib/libtbb.so.2
#3  0x00007f686c0a7f8e in start_thread (arg=0x7f6821db9700) at pthread_create.c:311
#4  0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f68215b7700 (LWP 3550)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f68670d1293 in ?? () from /usr/lib/libtbb.so.2
#2  0x00007f68670d12c9 in ?? () from /usr/lib/libtbb.so.2
#3  0x00007f686c0a7f8e in start_thread (arg=0x7f68215b7700) at pthread_create.c:311
#4  0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f68219b8700 (LWP 3551)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f68670d1293 in ?? () from /usr/lib/libtbb.so.2
#2  0x00007f68670d12c9 in ?? () from /usr/lib/libtbb.so.2
#3  0x00007f686c0a7f8e in start_thread (arg=0x7f68219b8700) at pthread_create.c:311
#4  0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f68211b6700 (LWP 3552)):
#0  0x00007f686f5a2abf in ?? () from /lib/x86_64-linux-gnu/libz.so.1
#1  0x00007f686f5a3cc8 in ?? () from /lib/x86_64-linux-gnu/libz.so.1
#2  0x00007f686f5a4833 in deflate () from /lib/x86_64-linux-gnu/libz.so.1
#3  0x00007f686f7c63b4 in ?? () from /lib/x86_64-linux-gnu/libpng12.so.0
#4  0x00007f686f7c687b in ?? () from /lib/x86_64-linux-gnu/libpng12.so.0
#5  0x00007f686f7ca434 in png_write_row () from /lib/x86_64-linux-gnu/libpng12.so.0
#6  0x00007f686f7ca658 in png_write_image () from /lib/x86_64-linux-gnu/libpng12.so.0
#7  0x00007f68727590e8 in QPNGImageWriter::writeImage (this=this@entry=0x7f68211b54d0, image=..., quality_in=quality_in@entry=9, description=..., off_x_in=off_x_in@entry=0, off_y_in=off_y_in@entry=0) at image/qpnghandler.cpp:882
#8  0x00007f687275961f in writeImage (description=..., quality=9, img=..., this=0x7f68211b54d0) at image/qpnghandler.cpp:165
#9  write_png_image (description=..., gamma=<optimized out>, quality=9, device=<optimized out>, image=...) at image/qpnghandler.cpp:917
#10 QPngHandler::write (this=<optimized out>, image=...) at image/qpnghandler.cpp:964
#11 0x00007f687272aa92 in QImageWriter::write (this=this@entry=0x7f68211b5570, image=...) at image/qimagewriter.cpp:606
#12 0x00007f6872718a3e in QImageData::doImageIO (this=<optimized out>, image=image@entry=0x7f68211b5720, writer=writer@entry=0x7f68211b5570, quality=quality@entry=0) at image/qimage.cpp:5240
#13 0x00007f6872718be6 in QImage::save (this=this@entry=0x7f68211b5720, fileName=..., format=format@entry=0x7f6874cfa3c8 "PNG", quality=quality@entry=0) at image/qimage.cpp:5209
#14 0x00007f6874bb0d47 in Digikam::ThumbnailCreator::storeFreedesktop (this=this@entry=0x1e493c0, info=..., image=...) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailcreator.cpp:1077
#15 0x00007f6874bb4097 in Digikam::ThumbnailCreator::load (this=0x1e493c0, path=..., rect=..., pregenerate=pregenerate@entry=false) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailcreator.cpp:277
#16 0x00007f6874bb4ae8 in Digikam::ThumbnailCreator::loadDetail (this=<optimized out>, path=..., rect=...) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailcreator.cpp:210
#17 0x00007f6874bc1a00 in Digikam::ThumbnailLoadingTask::execute (this=0x8dc4de0) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/thumbnailtask.cpp:176
#18 0x00007f6874b9b5ae in Digikam::LoadSaveThread::run (this=0x1e40300) at /build/buildd/digikam-3.1.0/core/libs/threadimageio/loadsavethread.cpp:136
#19 0x00007f6874bc80de in Digikam::DynamicThread::DynamicThreadPriv::run (this=0x1e47d40) at /build/buildd/digikam-3.1.0/core/libs/threads/dynamicthread.cpp:186
#20 0x00007f6871b6e55d in QThreadPoolThread::run (this=0x2fce350) at concurrent/qthreadpool.cpp:107
#21 0x00007f6871b7abec in QThreadPrivate::start (arg=0x2fce350) at thread/qthread_unix.cpp:338
#22 0x00007f686c0a7f8e in start_thread (arg=0x7f68211b6700) at pthread_create.c:311
#23 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f680b7fe700 (LWP 3554)):
#0  0x00007f6870d8b3cd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f68699071dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6871ca6036 in QEventDispatcherGlib::processEvents (this=0x7f679b481810, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7f680b7fdae0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7f680b7fdae0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6874bc564b in Digikam::WorkerObjectRunnable::run (this=0x40dac20) at /build/buildd/digikam-3.1.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007f6871b6e55d in QThreadPoolThread::run (this=0x2fceb80) at concurrent/qthreadpool.cpp:107
#8  0x00007f6871b7abec in QThreadPrivate::start (arg=0x2fceb80) at thread/qthread_unix.cpp:338
#9  0x00007f686c0a7f8e in start_thread (arg=0x7f680b7fe700) at pthread_create.c:311
#10 0x00007f6870d97e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f687731fa40 (LWP 2843)):
[KCrash Handler]
#6  QVariant::~QVariant (this=0x7fff00000000, __in_chrg=<optimized out>) at kernel/qvariant.cpp:1411
#7  0x00007f6874625771 in node_destruct (n=0xa071a08, this=<optimized out>) at /usr/include/qt4/QtCore/qlist.h:388
#8  erase (alast=..., afirst=..., this=0x1cdc598) at /usr/include/qt4/QtCore/qlist.h:811
#9  Digikam::ImageModel::removeRowPairs (this=this@entry=0x1ce51d0, toRemove=...) at /build/buildd/digikam-3.1.0/core/libs/models/imagemodel.cpp:1025
#10 0x00007f68746270fd in Digikam::ImageModel::finishIncrementalRefresh (this=this@entry=0x1ce51d0) at /build/buildd/digikam-3.1.0/core/libs/models/imagemodel.cpp:844
#11 0x000000000056c5b5 in Digikam::ImageAlbumModel::slotResult (this=0x1ce51d0, job=<optimized out>) at /build/buildd/digikam-3.1.0/core/libs/models/imagealbummodel.cpp:307
#12 0x00007f6871c8c0ef in QMetaObject::activate (sender=sender@entry=0x95a3b10, m=m@entry=0x7f68724864e0 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fff51228910) at kernel/qobject.cpp:3539
#13 0x00007f68720fa4e2 in KJob::result (this=this@entry=0x95a3b10, _t1=_t1@entry=0x95a3b10) at ./kjob.moc:208
#14 0x00007f68720fa520 in KJob::emitResult (this=this@entry=0x95a3b10) at ../../kdecore/jobs/kjob.cpp:318
#15 0x00007f6873abbd05 in KIO::SimpleJob::slotFinished (this=this@entry=0x95a3b10) at ../../kio/kio/job.cpp:494
#16 0x00007f6873abc1a2 in KIO::TransferJob::slotFinished (this=0x95a3b10) at ../../kio/kio/job.cpp:1081
#17 0x00007f6871c8c0ef in QMetaObject::activate (sender=sender@entry=0x7295a90, m=m@entry=0x7f6873e57620 <KIO::SlaveInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#18 0x00007f6873b54063 in KIO::SlaveInterface::finished (this=this@entry=0x7295a90) at ./slaveinterface.moc:185
#19 0x00007f6873b56d61 in KIO::SlaveInterface::dispatch (this=0x7295a90, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:172
#20 0x00007f6873b53e9a in KIO::SlaveInterface::dispatch (this=0x7295a90) at ../../kio/kio/slaveinterface.cpp:88
#21 0x00007f6873b4843e in KIO::Slave::gotInput (this=0x7295a90) at ../../kio/kio/slave.cpp:344
#22 0x00007f6871c8c0ef in QMetaObject::activate (sender=0x3589530, m=m@entry=0x7f6873e50b40 <KIO::Connection::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#23 0x00007f6873a87830 in KIO::Connection::readyRead (this=<optimized out>) at ./connection.moc:106
#24 0x00007f6873a87d22 in dequeue (this=<optimized out>) at ../../kio/kio/connection.cpp:82
#25 KIO::ConnectionPrivate::dequeue (this=0x81b8bd0) at ../../kio/kio/connection.cpp:71
#26 0x00007f6871c915be in QObject::event (this=0x3589530, e=<optimized out>) at kernel/qobject.cpp:1194
#27 0x00007f68726608ec in QApplicationPrivate::notify_helper (this=this@entry=0x1551940, receiver=receiver@entry=0x3589530, e=e@entry=0xb3e9070) at kernel/qapplication.cpp:4567
#28 0x00007f687266325b in QApplication::notify (this=this@entry=0x7fff51229f70, receiver=receiver@entry=0x3589530, e=e@entry=0xb3e9070) at kernel/qapplication.cpp:4428
#29 0x00007f687336daf6 in KApplication::notify (this=0x7fff51229f70, receiver=0x3589530, event=0xb3e9070) at ../../kdeui/kernel/kapplication.cpp:311
#30 0x00007f6871c7763e in QCoreApplication::notifyInternal (this=0x7fff51229f70, receiver=receiver@entry=0x3589530, event=event@entry=0xb3e9070) at kernel/qcoreapplication.cpp:946
#31 0x00007f6871c7b171 in sendEvent (event=0xb3e9070, receiver=0x3589530) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#32 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x14db990) at kernel/qcoreapplication.cpp:1570
#33 0x00007f6871c7b4a3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#34 0x00007f6871ca5e83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#35 postEventSourceDispatch (s=0x15523b0) at kernel/qeventdispatcher_glib.cpp:279
#36 0x00007f6869906f05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f6869907248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f6869907304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f6871ca6016 in QEventDispatcherGlib::processEvents (this=0x1551080, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#40 0x00007f68727061ae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007f6871c7638f in QEventLoop::processEvents (this=this@entry=0x7fff51229960, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007f6871c76618 in QEventLoop::exec (this=this@entry=0x7fff51229960, flags=...) at kernel/qeventloop.cpp:204
#43 0x00007f6871c7bcf6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#44 0x00007f687265effc in QApplication::exec () at kernel/qapplication.cpp:3828
#45 0x000000000048f9ab in main (argc=5, argv=0x7fff5122a1a8) at /build/buildd/digikam-3.1.0/core/digikam/main/main.cpp:235

This bug may be a duplicate of or related to bug 278049.

Possible duplicates by query: bug 321273, bug 314877, bug 314646, bug 312289, bug 308375.

Reported using DrKonqi
Comment 1 caulier.gilles 2013-07-02 07:07:16 UTC 

*** This bug has been marked as a duplicate of bug 278049 ***
Comment 2 caulier.gilles 2019-12-23 06:21:55 UTC 
Problem is fixed with new 7.0.0-beta1 through this long story from this bug

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

You can test digiKam 7.0.0-beta1 with bundle available here:

https://download.kde.org/unstable/digikam/

Don't hesitate to give us a fresh feedback about his entry.

Thanks in advance

Gilles Caulier