[Bug 262596] New: Digikam 2.0 (beta): Crash when finding faces

https://bugs.kde.org/show_bug.cgi?id=262596

           Summary: Digikam 2.0 (beta): Crash when finding faces
           Product: digikam
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Application: digikam (2.0.0-beta1)
KDE Platform Version: 4.5.1 (KDE 4.5.1)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-24-generic i686
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:
Built Digikam from sources.
Run. Went to "People" and clicked "Scan for Faces" (or what that button is
called). I did this once and canceled it after a while. Then I did it again. In
the background (well, the main window actually) I started adding tags for the
recognized people. I switched back to the other window.

Then it crashed.

Please contact me if further information are needed.

-- Backtrace:
Application: digiKam (digikam), signal: Segmentation fault
[Current thread is 1 (Thread 0xb654a890 (LWP 17436))]

Thread 14 (Thread 0xb43c2b70 (LWP 17563)):
#0  0x00ddc416 in __kernel_vsyscall ()
#1  0x006555cb in read () at ../sysdeps/unix/syscall-template.S:82
#2  0x02820d3a in read (this=0xb2d44d78, data=0x916a5588
"\336\356\372\b\244\022\202\320\253\r\353\"w\343\037\230\256\237U\361\347\207\374?\246Zi\360[]E}\022\315\344\064\361nV\301\347\236\203\036\225\317,\302\021\223\205H\312=\364\271\244!^\262\265\030\064\276\343\022\357B\263\212\355b\264\216[t\212\060e\215\223d,_\373\247\216\235\rrr\374Y\262\275\272KmB\366!3\252*,0\342L+s\320~\035)\307\061\215\364O\227\275\213\226\a\032\225\344\276\366u\177a[B\032\064\003\203\317$\344\n\315\263\326\344\236i1\277\227\314[\227\244L8\310\070\347\333\025\351Q\237\266\207\064\035\316Y\302\254\023\273\324\324\216]8\315\033_\332\213\246\221Hd\316\034\237o\245Gp\304\b\345\036"...,
len=102400) at /usr/include/bits/unistd.h:45
#3  qt_safe_read (this=0xb2d44d78, data=0x916a5588
"\336\356\372\b\244\022\202\320\253\r\353\"w\343\037\230\256\237U\361\347\207\374?\246Zi\360[]E}\022\315\344\064\361nV\301\347\236\203\036\225\317,\302\021\223\205H\312=\364\271\244!^\262\265\030\064\276\343\022\357B\263\212\355b\264\216[t\212\060e\215\223d,_\373\247\216\235\rrr\374Y\262\275\272KmB\366!3\252*,0\342L+s\320~\035)\307\061\215\364O\227\275\213\226\a\032\225\344\276\366u\177a[B\032\064\003\203\317$\344\n\315\263\326\344\236i1\277\227\314[\227\244L8\310\070\347\333\025\351Q\237\266\207\064\035\316Y\302\254\023\273\324\324\216]8\315\033_\332\213\246\221Hd\316\034\237o\245Gp\304\b\345\036"...,
len=102400) at
../../include/QtCore/private/../../../src/corelib/kernel/qcore_unix_p.h:253
#4  QFSFileEnginePrivate::readFdFh (this=0xb2d44d78, data=0x916a5588
"\336\356\372\b\244\022\202\320\253\r\353\"w\343\037\230\256\237U\361\347\207\374?\246Zi\360[]E}\022\315\344\064\361nV\301\347\236\203\036\225\317,\302\021\223\205H\312=\364\271\244!^\262\265\030\064\276\343\022\357B\263\212\355b\264\216[t\212\060e\215\223d,_\373\247\216\235\rrr\374Y\262\275\272KmB\366!3\252*,0\342L+s\320~\035)\307\061\215\364O\227\275\213\226\a\032\225\344\276\366u\177a[B\032\064\003\203\317$\344\n\315\263\326\344\236i1\277\227\314[\227\244L8\310\070\347\333\025\351Q\237\266\207\064\035\316Y\302\254\023\273\324\324\216]8\315\033_\332\213\246\221Hd\316\034\237o\245Gp\304\b\345\036"...,
len=102400) at io/qfsfileengine.cpp:703
#5  0x02829eca in QFSFileEnginePrivate::nativeRead (this=0xb2d44d78,
data=0x916a5588
"\336\356\372\b\244\022\202\320\253\r\353\"w\343\037\230\256\237U\361\347\207\374?\246Zi\360[]E}\022\315\344\064\361nV\301\347\236\203\036\225\317,\302\021\223\205H\312=\364\271\244!^\262\265\030\064\276\343\022\357B\263\212\355b\264\216[t\212\060e\215\223d,_\373\247\216\235\rrr\374Y\262\275\272KmB\366!3\252*,0\342L+s\320~\035)\307\061\215\364O\227\275\213\226\a\032\225\344\276\366u\177a[B\032\064\003\203\317$\344\n\315\263\326\344\236i1\277\227\314[\227\244L8\310\070\347\333\025\351Q\237\266\207\064\035\316Y\302\254\023\273\324\324\216]8\315\033_\332\213\246\221Hd\316\034\237o\245Gp\304\b\345\036"...,
len=102400) at io/qfsfileengine_unix.cpp:382
#6  0x02820124 in QFSFileEngine::read (this=0x922bfc90, data=0x916a5588
"\336\356\372\b\244\022\202\320\253\r\353\"w\343\037\230\256\237U\361\347\207\374?\246Zi\360[]E}\022\315\344\064\361nV\301\347\236\203\036\225\317,\302\021\223\205H\312=\364\271\244!^\262\265\030\064\276\343\022\357B\263\212\355b\264\216[t\212\060e\215\223d,_\373\247\216\235\rrr\374Y\262\275\272KmB\366!3\252*,0\342L+s\320~\035)\307\061\215\364O\227\275\213\226\a\032\225\344\276\366u\177a[B\032\064\003\203\317$\344\n\315\263\326\344\236i1\277\227\314[\227\244L8\310\070\347\333\025\351Q\237\266\207\064\035\316Y\302\254\023\273\324\324\216]8\315\033_\332\213\246\221Hd\316\034\237o\245Gp\304\b\345\036"...,
maxlen=102400) at io/qfsfileengine.cpp:657
#7  0x027dd5c9 in QFile::readData (this=0xb43c19c4, data=0x916a5588
"\336\356\372\b\244\022\202\320\253\r\353\"w\343\037\230\256\237U\361\347\207\374?\246Zi\360[]E}\022\315\344\064\361nV\301\347\236\203\036\225\317,\302\021\223\205H\312=\364\271\244!^\262\265\030\064\276\343\022\357B\263\212\355b\264\216[t\212\060e\215\223d,_\373\247\216\235\rrr\374Y\262\275\272KmB\366!3\252*,0\342L+s\320~\035)\307\061\215\364O\227\275\213\226\a\032\225\344\276\366u\177a[B\032\064\003\203\317$\344\n\315\263\326\344\236i1\277\227\314[\227\244L8\310\070\347\333\025\351Q\237\266\207\064\035\316Y\302\254\023\273\324\324\216]8\315\033_\332\213\246\221Hd\316\034\237o\245Gp\304\b\345\036"...,
len=102400) at io/qfile.cpp:1542
#8  0x027e4701 in QIODevice::read (this=0xb43c19c4, data=0x916a5588
"\336\356\372\b\244\022\202\320\253\r\353\"w\343\037\230\256\237U\361\347\207\374?\246Zi\360[]E}\022\315\344\064\361nV\301\347\236\203\036\225\317,\302\021\223\205H\312=\364\271\244!^\262\265\030\064\276\343\022\357B\263\212\355b\264\216[t\212\060e\215\223d,_\373\247\216\235\rrr\374Y\262\275\272KmB\366!3\252*,0\342L+s\320~\035)\307\061\215\364O\227\275\213\226\a\032\225\344\276\366u\177a[B\032\064\003\203\317$\344\n\315\263\326\344\236i1\277\227\314[\227\244L8\310\070\347\333\025\351Q\237\266\207\064\035\316Y\302\254\023\273\324\324\216]8\315\033_\332\213\246\221Hd\316\034\237o\245Gp\304\b\345\036"...,
maxSize=102400) at io/qiodevice.cpp:855
#9  0x0157c839 in Digikam::DImgLoader::uniqueHashV2 (filePath=...,
img=0xb43c1c28) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/dimg/loaders/dimgloader.cpp:310
#10 0x01558757 in Digikam::DImg::getUniqueHashV2 (this=0xb43c1c28) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/dimg/dimg.cpp:2637
#11 0x00c25d24 in Digikam::ImageScanner::uniqueHash (this=0xb43c1c18) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/imagescanner.cpp:1095
#12 0x00c26052 in Digikam::ImageScanner::prepareImage (this=0xb43c1c18) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/imagescanner.cpp:225
#13 0x00c2618f in Digikam::ImageScanner::addImage (this=0xb43c1c18, albumId=0)
at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/imagescanner.cpp:230
#14 0x00c2d121 in Digikam::ImageScanner::newFile (this=0xb43c1c18, albumId=0)
at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/imagescanner.cpp:102
#15 0x00bcba45 in Digikam::CollectionScanner::scanNewFile (this=0xb43c215c,
info=..., albumId=0) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/collectionscanner.cpp:898
#16 0x00bcd6bb in Digikam::CollectionScanner::scanAlbum (this=0xb43c215c,
location=..., album=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/collectionscanner.cpp:754
#17 0x00bcd5d2 in Digikam::CollectionScanner::scanAlbum (this=0xb43c215c,
location=..., album=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/collectionscanner.cpp:777
#18 0x00bcd5d2 in Digikam::CollectionScanner::scanAlbum (this=0xb43c215c,
location=..., album=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/collectionscanner.cpp:777
#19 0x00bcdf47 in Digikam::CollectionScanner::scanAlbumRoot (this=0xb43c215c,
location=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/collectionscanner.cpp:537
#20 0x00bce9bb in Digikam::CollectionScanner::partialScan (this=0xb43c215c,
albumRoot=..., album=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/collectionscanner.cpp:398
#21 0x00bcedc4 in Digikam::CollectionScanner::partialScan (this=0xb43c215c,
filePath=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/collectionscanner.cpp:347
#22 0x082a906b in Digikam::ScanController::run (this=0xa0eb410) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/digikam/scancontroller.cpp:640
#23 0x02751df9 in QThreadPrivate::start (arg=0xa0eb410) at
thread/qthread_unix.cpp:266
#24 0x0064dcc9 in start_thread (arg=0xb43c2b70) at pthread_create.c:304
#25 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 13 (Thread 0xb3bc1b70 (LWP 17575)):
#0  0x00ddc416 in __kernel_vsyscall ()
#1  0x006524dc in pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x027529c7 in wait (this=0xb3098fe8, mutex=0xb3098fe4, time=4294967295) at
thread/qwaitcondition_unix.cpp:88
#3  QWaitCondition::wait (this=0xb3098fe8, mutex=0xb3098fe4, time=4294967295)
at thread/qwaitcondition_unix.cpp:160
#4  0x0178afca in Digikam::ParkingThread::run (this=0xb3098fd8) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threads/threadmanager.cpp:119
#5  0x02751df9 in QThreadPrivate::start (arg=0xb3098fd8) at
thread/qthread_unix.cpp:266
#6  0x0064dcc9 in start_thread (arg=0xb3bc1b70) at pthread_create.c:304
#7  0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 12 (Thread 0xb19b9b70 (LWP 17606)):
#0  0x037bbe36 in clock_gettime (clock_id=58458100, tp=0xb19b8e10) at
../sysdeps/unix/clock_gettime.c:100
#1  0x027ad50b in do_gettime () at tools/qelapsedtimer_unix.cpp:105
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:119
#3  0x028846e5 in QTimerInfoList::updateCurrentTime (this=0xc6100f4) at
kernel/qeventdispatcher_unix.cpp:339
#4  0x0288472a in QTimerInfoList::timerWait (this=0xc6100f4, tm=...) at
kernel/qeventdispatcher_unix.cpp:442
#5  0x028827a8 in timerSourcePrepareHelper (src=<value optimized out>,
timeout=0xb19b8f3c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x0288283d in timerSourcePrepare (source=0x0, timeout=0x37bfff4) at
kernel/qeventdispatcher_glib.cpp:169
#7  0x05522e6a in g_main_context_prepare () from /lib/libglib-2.0.so.0
#8  0x05523279 in ?? () from /lib/libglib-2.0.so.0
#9  0x05523848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#10 0x0288259f in QEventDispatcherGlib::processEvents (this=0xc611910,
flags=...) at kernel/qeventdispatcher_glib.cpp:417
#11 0x02852609 in QEventLoop::processEvents (this=0xb19b9110, flags=) at
kernel/qeventloop.cpp:149
#12 0x02852a8a in QEventLoop::exec (this=0xb19b9110, flags=...) at
kernel/qeventloop.cpp:201
#13 0x0274eb7e in QThread::exec (this=0xc611498) at thread/qthread.cpp:490
#14 0x0283135b in QInotifyFileSystemWatcherEngine::run (this=0xc611498) at
io/qfilesystemwatcher_inotify.cpp:248
#15 0x02751df9 in QThreadPrivate::start (arg=0xc611498) at
thread/qthread_unix.cpp:266
#16 0x0064dcc9 in start_thread (arg=0xb19b9b70) at pthread_create.c:304
#17 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 11 (Thread 0xab243b70 (LWP 17607)):
#0  0x00ddc416 in __kernel_vsyscall ()
#1  0x00652884 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_timedwait.S:236
#2  0x06262b3f in ?? () from /usr/lib/libxine.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 10 (Thread 0xaa637b70 (LWP 17608)):
#0  0x00ddc416 in __kernel_vsyscall ()
#1  0x02a51371 in select () at ../sysdeps/unix/syscall-template.S:82
#2  0x0628ef1c in xine_usec_sleep () from /usr/lib/libxine.so.1
#3  0x00000000 in ?? ()

Thread 9 (Thread 0xa9e36b70 (LWP 17609)):
#0  __pthread_mutex_lock (mutex=0xcbd368c) at pthread_mutex_lock.c:125
#1  0x05522ea3 in g_main_context_prepare () from /lib/libglib-2.0.so.0
#2  0x05523279 in ?? () from /lib/libglib-2.0.so.0
#3  0x05523848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#4  0x0288259f in QEventDispatcherGlib::processEvents (this=0xcbd3608,
flags=...) at kernel/qeventdispatcher_glib.cpp:417
#5  0x02852609 in QEventLoop::processEvents (this=0xa9e36100, flags=) at
kernel/qeventloop.cpp:149
#6  0x02852a8a in QEventLoop::exec (this=0xa9e36100, flags=...) at
kernel/qeventloop.cpp:201
#7  0x0274eb7e in QThread::exec (this=0xcbd3210) at thread/qthread.cpp:490
#8  0x06e6681a in ?? () from /usr/lib/qt4/plugins/phonon_backend/phonon_xine.so
#9  0x02751df9 in QThreadPrivate::start (arg=0xcbd3210) at
thread/qthread_unix.cpp:266
#10 0x0064dcc9 in start_thread (arg=0xa9e36b70) at pthread_create.c:304
#11 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 8 (Thread 0xa9635b70 (LWP 17610)):
#0  0x006503c0 in __pthread_mutex_lock (mutex=0xb322f960) at
pthread_mutex_lock.c:50
#1  0x0912ab31 in pa_mutex_lock () from /usr/lib/libpulsecommon-0.9.21.so
#2  0x0098d56c in ?? () from /usr/lib/libpulse.so.0
#3  0x00979ab9 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0x0097ba73 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0x0097bb44 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0x0098d303 in ?? () from /usr/lib/libpulse.so.0
#7  0x0912bbd5 in ?? () from /usr/lib/libpulsecommon-0.9.21.so
#8  0x0064dcc9 in start_thread (arg=0xa9635b70) at pthread_create.c:304
#9  0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 7 (Thread 0xa4cffb70 (LWP 17611)):
#0  0x00ddc416 in __kernel_vsyscall ()
#1  0x006524dc in pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x06274b54 in ?? () from /usr/lib/libxine.so.1
#3  0x00000000 in ?? ()

Thread 6 (Thread 0xa14f8b70 (LWP 17850)):
#0  0x00ddc416 in __kernel_vsyscall ()
#1  0x02a5172f in fdatasync () at ../sysdeps/unix/syscall-template.S:82
#2  0x06f573a8 in ?? () from /usr/lib/libsqlite3.so.0
#3  0x06f4800b in ?? () from /usr/lib/libsqlite3.so.0
#4  0x06f7e82c in ?? () from /usr/lib/libsqlite3.so.0
#5  0x06f7f012 in ?? () from /usr/lib/libsqlite3.so.0
#6  0x06fb2c8f in ?? () from /usr/lib/libsqlite3.so.0
#7  0x06f9f068 in sqlite3_step () from /usr/lib/libsqlite3.so.0
#8  0x04ed52d1 in QSQLiteResultPrivate::fetchNext (this=0x9e28478, values=...,
idx=0, initialFetch=true) at ../../../sql/drivers/sqlite/qsql_sqlite.cpp:209
#9  0x04ed63f2 in QSQLiteResult::exec (this=0xc5116c8) at
../../../sql/drivers/sqlite/qsql_sqlite.cpp:410
#10 0x00a80b0c in QSqlQuery::exec (this=0xa14f7b88) at kernel/qsqlquery.cpp:942
#11 0x01714e62 in Digikam::DatabaseCoreBackend::exec (this=0x9ed6020,
query=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/databasecorebackend.cpp:1406
#12 0x017172d3 in Digikam::DatabaseCoreBackend::execQuery (this=0x9ed6020,
query=..., boundValue1=..., boundValue2=..., boundValue3=..., boundValue4=...)
at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/databasecorebackend.cpp:1078
#13 0x0171733e in Digikam::DatabaseCoreBackend::execQuery (this=0x9ed6020,
sql=..., boundValue1=..., boundValue2=..., boundValue3=..., boundValue4=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/databasecorebackend.cpp:1023
#14 0x017173c5 in Digikam::DatabaseCoreBackend::execSql (this=0x9ed6020,
sql=..., boundValue1=..., boundValue2=..., boundValue3=..., boundValue4=...,
values=0x0, lastInsertId=0xa14f7c50) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/databasecorebackend.cpp:922
#15 0x0172260a in Digikam::ThumbnailDB::insertThumbnail (this=0xa0d8190,
info=..., lastInsertId=0xa14f7d2c) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/database/thumbnaildb.cpp:262
#16 0x0175cd81 in Digikam::ThumbnailCreator::storeInDatabase (this=0xcea2208,
info=..., image=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threadimageio/thumbnailcreator.cpp:755
#17 0x017601b6 in Digikam::ThumbnailCreator::load (this=0xcea2208, path=...,
rect=..., pregenerate=false) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threadimageio/thumbnailcreator.cpp:264
#18 0x0176049b in Digikam::ThumbnailCreator::load (this=0xcea2208, path=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threadimageio/thumbnailcreator.cpp:196
#19 0x0176b1e5 in Digikam::ThumbnailLoadingTask::execute (this=0xd5c40f8) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threadimageio/thumbnailtask.cpp:169
#20 0x0173f3e3 in Digikam::LoadSaveThread::run (this=0xce7e810) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threadimageio/loadsavethread.cpp:124
#21 0x0178ccfe in Digikam::DynamicThread::DynamicThreadPriv::run
(this=0xce96d00) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threads/dynamicthread.cpp:324
#22 0x02746523 in QThreadPoolThread::run (this=0xbd94458) at
concurrent/qthreadpool.cpp:106
#23 0x02751df9 in QThreadPrivate::start (arg=0xbd94458) at
thread/qthread_unix.cpp:266
#24 0x0064dcc9 in start_thread (arg=0xa14f8b70) at pthread_create.c:304
#25 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 5 (Thread 0x9caf7b70 (LWP 18000)):
#0  0x00ddc416 in __kernel_vsyscall ()
#1  0x02a49df6 in __poll (fds=0x2ae0ff4, nfds=1, timeout=-1) at
../sysdeps/unix/sysv/linux/poll.c:87
#2  0x05530a1b in g_poll () from /lib/libglib-2.0.so.0
#3  0x0552343c in ?? () from /lib/libglib-2.0.so.0
#4  0x05523848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#5  0x0288259f in QEventDispatcherGlib::processEvents (this=0xcc64960,
flags=...) at kernel/qeventdispatcher_glib.cpp:417
#6  0x02852609 in QEventLoop::processEvents (this=0x9caf7120, flags=) at
kernel/qeventloop.cpp:149
#7  0x02852a8a in QEventLoop::exec (this=0x9caf7120, flags=...) at
kernel/qeventloop.cpp:201
#8  0x0178a65c in Digikam::WorkerObjectRunnable::run (this=0xab07750) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threads/threadmanager.cpp:190
#9  0x02746523 in QThreadPoolThread::run (this=0xb535e70) at
concurrent/qthreadpool.cpp:106
#10 0x02751df9 in QThreadPrivate::start (arg=0xb535e70) at
thread/qthread_unix.cpp:266
#11 0x0064dcc9 in start_thread (arg=0x9caf7b70) at pthread_create.c:304
#12 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 4 (Thread 0xa24fab70 (LWP 18002)):
#0  0x037bbe36 in clock_gettime (clock_id=58458100, tp=0xa24f9e10) at
../sysdeps/unix/clock_gettime.c:100
#1  0x027ad50b in do_gettime () at tools/qelapsedtimer_unix.cpp:105
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:119
#3  0x028846e5 in QTimerInfoList::updateCurrentTime (this=0xb6212a4) at
kernel/qeventdispatcher_unix.cpp:339
#4  0x0288472a in QTimerInfoList::timerWait (this=0xb6212a4, tm=...) at
kernel/qeventdispatcher_unix.cpp:442
#5  0x028827a8 in timerSourcePrepareHelper (src=<value optimized out>,
timeout=0xa24f9f3c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x0288283d in timerSourcePrepare (source=0x0, timeout=0x37bfff4) at
kernel/qeventdispatcher_glib.cpp:169
#7  0x05522e6a in g_main_context_prepare () from /lib/libglib-2.0.so.0
#8  0x05523279 in ?? () from /lib/libglib-2.0.so.0
#9  0x05523848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#10 0x0288259f in QEventDispatcherGlib::processEvents (this=0xd0e92a0,
flags=...) at kernel/qeventdispatcher_glib.cpp:417
#11 0x02852609 in QEventLoop::processEvents (this=0xa24fa120, flags=) at
kernel/qeventloop.cpp:149
#12 0x02852a8a in QEventLoop::exec (this=0xa24fa120, flags=...) at
kernel/qeventloop.cpp:201
#13 0x0178a65c in Digikam::WorkerObjectRunnable::run (this=0xa8ac838) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threads/threadmanager.cpp:190
#14 0x02746523 in QThreadPoolThread::run (this=0xbd91060) at
concurrent/qthreadpool.cpp:106
#15 0x02751df9 in QThreadPrivate::start (arg=0xbd91060) at
thread/qthread_unix.cpp:266
#16 0x0064dcc9 in start_thread (arg=0xa24fab70) at pthread_create.c:304
#17 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 3 (Thread 0x9daf9b70 (LWP 18005)):
#0  0x00651796 in __pthread_mutex_unlock_usercnt (mutex=0xaaf294c, decr=1) at
pthread_mutex_unlock.c:36
#1  0x055231e6 in ?? () from /lib/libglib-2.0.so.0
#2  0x05523848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x0288259f in QEventDispatcherGlib::processEvents (this=0xab41958,
flags=...) at kernel/qeventdispatcher_glib.cpp:417
#4  0x02852609 in QEventLoop::processEvents (this=0x9daf9120, flags=) at
kernel/qeventloop.cpp:149
#5  0x02852a8a in QEventLoop::exec (this=0x9daf9120, flags=...) at
kernel/qeventloop.cpp:201
#6  0x0178a65c in Digikam::WorkerObjectRunnable::run (this=0xd87ed70) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threads/threadmanager.cpp:190
#7  0x02746523 in QThreadPoolThread::run (this=0xb2d03b68) at
concurrent/qthreadpool.cpp:106
#8  0x02751df9 in QThreadPrivate::start (arg=0xb2d03b68) at
thread/qthread_unix.cpp:266
#9  0x0064dcc9 in start_thread (arg=0x9daf9b70) at pthread_create.c:304
#10 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 2 (Thread 0x9d2f8b70 (LWP 18006)):
#0  0x05522e6a in g_main_context_prepare () from /lib/libglib-2.0.so.0
#1  0x05523279 in ?? () from /lib/libglib-2.0.so.0
#2  0x05523848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x0288259f in QEventDispatcherGlib::processEvents (this=0xb998d98,
flags=...) at kernel/qeventdispatcher_glib.cpp:417
#4  0x02852609 in QEventLoop::processEvents (this=0x9d2f8120, flags=) at
kernel/qeventloop.cpp:149
#5  0x02852a8a in QEventLoop::exec (this=0x9d2f8120, flags=...) at
kernel/qeventloop.cpp:201
#6  0x0178a65c in Digikam::WorkerObjectRunnable::run (this=0xc0e7d10) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/threads/threadmanager.cpp:190
#7  0x02746523 in QThreadPoolThread::run (this=0xbd8b9e0) at
concurrent/qthreadpool.cpp:106
#8  0x02751df9 in QThreadPrivate::start (arg=0xbd8b9e0) at
thread/qthread_unix.cpp:266
#9  0x0064dcc9 in start_thread (arg=0x9d2f8b70) at pthread_create.c:304
#10 0x02a5869e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb654a890 (LWP 17436)):
[KCrash Handler]
#7  Private (this=0xbfbe0894, p=...) at
../../include/QtCore/../../src/corelib/kernel/qvariant.h:360
#8  QVariant::QVariant (this=0xbfbe0894, p=...) at kernel/qvariant.cpp:1419
#9  0x0287734f in QVariant::cmp (this=0xc6bf108, v=...) at
kernel/qvariant.cpp:2853
#10 0x00c839a9 in operator== (this=0xc10bc10, infos=..., extraValues=...) at
/usr/include/qt4/QtCore/qvariant.h:409
#11 Digikam::ImageModelIncrementalUpdater::appendInfos (this=0xc10bc10,
infos=..., extraValues=...) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/models/imagemodel.cpp:888
#12 0x081c2641 in Digikam::ImageAlbumModel::slotData (this=0xc5de928, data=...)
at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/libs/models/imagealbummodel.cpp:364
#13 0x081c2a64 in Digikam::ImageAlbumModel::qt_metacall (this=0xc5de928,
_c=QMetaObject::InvokeMetaMethod, _id=55, _a=0xbfbe0b84) at
/home/chris/src/digikam/digikam-2.0.0-beta1/build/core/digikam/imagealbummodel.moc:118
#14 0x028598ca in QMetaObject::metacall (object=0xc5de928, cl=12, idx=55,
argv=0xbfbe0b84) at kernel/qmetaobject.cpp:237
#15 0x0286c6ad in QMetaObject::activate (sender=0xaaf7b78, m=0x1c1cfb0,
local_signal_index=0, argv=0xc0000000) at kernel/qobject.cpp:3280
#16 0x01a674c9 in KIO::TransferJob::data (this=0xaaf7b78, _t1=0xaaf7b78,
_t2=...) at ./jobclasses.moc:388
#17 0x01a6a312 in KIO::TransferJob::slotData (this=0xaaf7b78, _data=...) at
../../kio/kio/job.cpp:1003
#18 0x01a6e475 in KIO::TransferJob::qt_metacall (this=0xaaf7b78,
_c=QMetaObject::InvokeMetaMethod, _id=48, _a=0xbfbe0d38) at
./jobclasses.moc:368
#19 0x01a6e562 in KIO::SpecialJob::qt_metacall (this=0xaaf7b78,
_c=QMetaObject::InvokeMetaMethod, _id=48, _a=0xbfbe0d38) at
./jobclasses.moc:895
#20 0x028598ca in QMetaObject::metacall (object=0xaaf7b78, cl=12, idx=48,
argv=0xbfbe0d38) at kernel/qmetaobject.cpp:237
#21 0x0286c6ad in QMetaObject::activate (sender=0xb504130, m=0x1c1f944,
local_signal_index=0, argv=0xc0000000) at kernel/qobject.cpp:3280
#22 0x01b290e3 in KIO::SlaveInterface::data (this=0xb504130, _t1=...) at
./slaveinterface.moc:146
#23 0x01b2c81e in KIO::SlaveInterface::dispatch (this=0xb504130, _cmd=100,
rawdata=...) at ../../kio/kio/slaveinterface.cpp:163
#24 0x01b29483 in KIO::SlaveInterface::dispatch (this=0xb504130) at
../../kio/kio/slaveinterface.cpp:91
#25 0x01b1bfe8 in KIO::Slave::gotInput (this=0xb504130) at
../../kio/kio/slave.cpp:344
#26 0x01b1c1f3 in KIO::Slave::qt_metacall (this=0xb504130,
_c=QMetaObject::InvokeMetaMethod, _id=30, _a=0xbfbe102c) at ./slave.moc:82
#27 0x028598ca in QMetaObject::metacall (object=0xb504130, cl=12, idx=30,
argv=0xbfbe102c) at kernel/qmetaobject.cpp:237
#28 0x0286c6ad in QMetaObject::activate (sender=0xa789010, m=0x1c1c500,
local_signal_index=0, argv=0xc0000000) at kernel/qobject.cpp:3280
#29 0x01a35e17 in KIO::Connection::readyRead (this=0xa789010) at
./connection.moc:92
#30 0x01a3817e in KIO::ConnectionPrivate::dequeue (this=0xd02e8e0) at
../../kio/kio/connection.cpp:82
#31 0x01a382ae in KIO::Connection::qt_metacall (this=0xa789010,
_c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xd5c1cf8) at ./connection.moc:79
#32 0x028598ca in QMetaObject::metacall (object=0xa789010, cl=12, idx=5,
argv=0xd5c1cf8) at kernel/qmetaobject.cpp:237
#33 0x02864df6 in QMetaCallEvent::placeMetaCall (this=0xb7e9178,
object=0xa789010) at kernel/qobject.cpp:534
#34 0x028666a2 in QObject::event (this=0xa789010, e=0x9) at
kernel/qobject.cpp:1219
#35 0x01d52fdc in QApplicationPrivate::notify_helper (this=0x9dd7188,
receiver=0xa789010, e=0xb7e9178) at kernel/qapplication.cpp:4396
#36 0x01d5904e in QApplication::notify (this=0xbfbe19fc, receiver=0xa789010,
e=0xb7e9178) at kernel/qapplication.cpp:3798
#37 0x051ee68a in KApplication::notify (this=0xbfbe19fc, receiver=0xa789010,
event=0xb7e9178) at ../../kdeui/kernel/kapplication.cpp:310
#38 0x02853b3b in QCoreApplication::notifyInternal (this=0xbfbe19fc,
receiver=0xa789010, event=0xb7e9178) at kernel/qcoreapplication.cpp:732
#39 0x02856d8b in sendEvent (receiver=0x0, event_type=0, data=0x9da43b8) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#40 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0,
data=0x9da43b8) at kernel/qcoreapplication.cpp:1373
#41 0x02856f4d in QCoreApplication::sendPostedEvents (receiver=0x0,
event_type=0) at kernel/qcoreapplication.cpp:1266
#42 0x02882a74 in sendPostedEvents (s=0x9dd9510) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#43 postEventSourceDispatch (s=0x9dd9510) at
kernel/qeventdispatcher_glib.cpp:277
#44 0x0551f855 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#45 0x05523668 in ?? () from /lib/libglib-2.0.so.0
#46 0x05523848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#47 0x02882565 in QEventDispatcherGlib::processEvents (this=0x9da3e80,
flags=...) at kernel/qeventdispatcher_glib.cpp:415
#48 0x01e14be5 in QGuiEventDispatcherGlib::processEvents (this=0x9da3e80,
flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#49 0x02852609 in QEventLoop::processEvents (this=0xbfbe18e4, flags=) at
kernel/qeventloop.cpp:149
#50 0x02852a8a in QEventLoop::exec (this=0xbfbe18e4, flags=...) at
kernel/qeventloop.cpp:201
#51 0x0285700f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#52 0x01d51e07 in QApplication::exec () at kernel/qapplication.cpp:3672
#53 0x0831b8cb in main (argc=1, argv=0xbfbe1c94) at
/home/chris/src/digikam/digikam-2.0.0-beta1/core/digikam/main.cpp:232

Reported using DrKonqi

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          Component|general                     |Face Detection
            Version|unspecified                 |2.0.0




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2011-01-08 23:47:42 ---
The crash trace is not relevant of face detection code, but something about
model view implementation.

Gilles Caulier

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--- Comment #2 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-01-11 13:18:52 ---
Where you watching the "Unknown" people list or some other tag from the
"people" sidebar in the main view while the crash occurred?
What's "the other window"?

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                   |                            |il.com




--- Comment #3 from unapiedra <devoutlytobewished googlemail com>  2011-01-17 11:00:54 ---
> Where you watching the "Unknown" people list or some other tag from the
"people" sidebar in the main view while the crash occurred?
Yes, I was watching the "Unknown" people list.

What's "the other window"?
> "The other window" is the one with the title "Scanning faces -- digikam", i.e. this moving status bar while digikam searches for faces.

To make it clearer from my initial description: I had restarted scanning for
faces and parallel to this I was marking people in the "unknown" people list.

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--- Comment #4 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-01-17 15:39:12 ---
Just to confirm that the correct ioslaves are installed: In the "People"
albums, you see always only the face as thumbnail, not the full image?

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--- Comment #5 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-01-17 16:35:53 ---
SVN commit 1215084 by mwiesweg:

Add a small safety net here, though I'm not sure if it's necessary,
if it's the problem at all
CCBUG: 262596


 M  +2 -1      imagemodel.cpp  


WebSVN link: http://websvn.kde.org/?view=rev&revision=1215084

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--- Comment #6 from Marcel Wiesweg <marcel wiesweg gmx de>  2011-01-17 16:49:44 ---
*** Bug 262873 has been marked as a duplicate of this bug. ***

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--- Comment #7 from unapiedra <devoutlytobewished googlemail com>  2011-01-18 13:50:08 ---
(In reply to comment #4)
> Just to confirm that the correct ioslaves are installed: In the "People"
> albums, you see always only the face as thumbnail, not the full image?
That is correct.

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--- Comment #8 from Gilles Caulier <caulier gilles gmail com>  2011-03-22 12:21:18 ---
*** Bug 268102 has been marked as a duplicate of this bug. ***

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--- Comment #9 from Gilles Caulier <caulier gilles gmail com>  2011-03-22 12:23:02 ---
Created an attachment (id=58247)
 --> (http://bugs.kde.org/attachment.cgi?id=58247)
face detection in 2.0.0-beta4

With current digiKam Software Collection implementation from Git master
(beta4), face detection work fine and do not crash. Libface have been updated
to 0.2.0.

Please checkout source code and try again...

Gilles Caulier

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--- Comment #10 from  <emiel salomonv nl>  2011-06-27 19:08:11 ---
Created an attachment (id=61379)
 --> (http://bugs.kde.org/attachment.cgi?id=61379)
New crash information added by DrKonqi

digikam (2.0.0-beta6) on KDE Platform 4.6.2 (4.6.2) using Qt 4.7.2

- What I was doing when the application crashed:

I was just tagging faces while digiKam was still searching.

-- Backtrace (Reduced):
#7  Private (this=0xbfd37c44, p=...) at
../../include/QtCore/../../src/corelib/kernel/qvariant.h:360
#8  QVariant::QVariant (this=0xbfd37c44, p=...) at kernel/qvariant.cpp:1419
#9  0x078f2e4c in Digikam::ImageModel::data (this=0x87f0ef0, index=...,
role=37) at
/build/buildd/digikam2-2.0.0~beta6/core/libs/models/imagemodel.cpp:1016
#10 0x07904f81 in Digikam::ImageThumbnailModel::data (this=0x87f0ef0,
index=..., role=37) at
/build/buildd/digikam2-2.0.0~beta6/core/libs/models/imagethumbnailmodel.cpp:279
#11 0x078f71ad in data (this=0x89c9440, left=..., right=...) at
/usr/include/qt4/QtCore/qabstractitemmodel.h:398

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--- Comment #11 from Gilles Caulier <caulier gilles gmail com>  2011-06-28 04:55:54 ---
emiel,

It's not face detection crash but something about thumbnails management. Can
you test with current implementation from git master  (next 2.0.0 RC) ?

Gilles Caulier

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--- Comment #12 from Gilles Caulier <caulier gilles gmail com>  2011-07-02 10:02:03 ---
digiKam 2.0.0 RC is out. Please check if crash is reproducible with this
version.

Thanks in advance

Gilles Caulier

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--- Comment #13 from Gilles Caulier <caulier gilles gmail com>  2011-07-05 04:55:59 ---
Marcel, It sound like reproducible with RC. Same backtrace from other reports
(but not in my computer)

Gilles Caulier

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--- Comment #14 from Gilles Caulier <caulier gilles gmail com>  2011-07-05 04:56:16 ---
*** Bug 277099 has been marked as a duplicate of this bug. ***

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--- Comment #15 from Richard Mortimer <richm+kde oldelvet org uk>  2011-07-12 13:14:42 ---
Created an attachment (id=61805)
 --> (http://bugs.kde.org/attachment.cgi?id=61805)
New crash information added by DrKonqi

digikam (2.0.0-rc) on KDE Platform 4.6.4 (4.6.4) using Qt 4.7.2

- What I was doing when the application crashed:

I was manually checking/correcting & adding missing face tag squares (but not
setting names to the tags at the time of the crash) to pictures in the preview
screen whilst images tagging/recognition was ongoing in the background.

I think this is the same as both this bug 262596 and bug 277099 which was
marked as duplicates of this.

This latest crash was after all of my libraries had been upgraded from the
Maverick ones to the latest Natty philip5 ppa packages. The computer has been
restarted a couple of times after the package upgrades so I am sure that there
were no leftovers of the Maverick code running.

I have reproduced a similar crash twice in the last hour. I only got a
stacktrace from the 2nd one though.

When I get time I will try the same test using valgrind but it is much harder
to reproduce in that slow environment.

-- Backtrace (Reduced):
#7  Private (this=0xbfecc584, p=...) at
../../include/QtCore/../../src/corelib/kernel/qvariant.h:360
#8  QVariant::QVariant (this=0xbfecc584, p=...) at kernel/qvariant.cpp:1419
#9  0xb64fca3c in Digikam::ImageModel::data (this=0x9ce0f50, index=...,
role=37) at
/build/buildd/digikam2-2.0.0~rc1/core/libs/models/imagemodel.cpp:1016
#10 0xb650eb71 in Digikam::ImageThumbnailModel::data (this=0x9ce0f50,
index=..., role=37) at
/build/buildd/digikam2-2.0.0~rc1/core/libs/models/imagethumbnailmodel.cpp:279
#11 0xb6500d9d in data (this=0x9ce8a40, left=..., right=...) at
/usr/include/qt4/QtCore/qabstractitemmodel.h:398

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--- Comment #16 from Joshua Hopp <JoshuaHopp web de>  2011-07-20 13:45:16 ---
Created an attachment (id=62018)
 --> (http://bugs.kde.org/attachment.cgi?id=62018)
New crash information added by DrKonqi

digikam (2.0.0) on KDE Platform 4.6.2 (4.6.2) using Qt 4.7.2

- What I was doing when the application crashed:

Run face detection. Aborted. Started face detection again. Meanwhile, I added
Tags manually to faces marked "unknown" and deleted results with no real faces.
Then it crashed.

-- Backtrace (Reduced):
#11 0x00007fda8a163f57 in QList<QVariant>::operator[] (this=0x2c09e48, i=219)
at /usr/include/qt4/QtCore/qlist.h:464
#12 0x00007fda8a246688 in Digikam::ImageModel::data (this=0x2be68a0, index=...,
role=37) at
/home/joshua/pakete/digikam/digikam-sc/core/libs/models/imagemodel.cpp:1078
#13 0x00007fda8a25d0db in Digikam::ImageThumbnailModel::data (this=0x2be68a0,
index=..., role=37) at
/home/joshua/pakete/digikam/digikam-sc/core/libs/models/imagethumbnailmodel.cpp:279
#14 0x00007fda8a226987 in QModelIndex::data (this=0x7fffa8c1b590, arole=37) at
/usr/include/qt4/QtCore/qabstractitemmodel.h:398
#15 0x00007fda8a25112e in Digikam::ImageFilterModel::subSortLessThan
(this=0x2bc0e00, left=..., right=...) at
/home/joshua/pakete/digikam/digikam-sc/core/libs/models/imagefiltermodel.cpp:1054

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--- Comment #17 from Hatl <hatl gmx net>  2011-08-01 12:47:00 ---
Created an attachment (id=62421)
 --> (http://bugs.kde.org/attachment.cgi?id=62421)
New crash information added by DrKonqi

digikam (2.0.0) on KDE Platform 4.7.00 (4.7.0) using Qt 4.7.2

same problem here
editing tags while running face reckognition

-- Backtrace (Reduced):
#6  Private (this=0x7fff7555f820, p=...) at
../../include/QtCore/../../src/corelib/kernel/qvariant.h:360
#7  QVariant::QVariant (this=0x7fff7555f820, p=...) at kernel/qvariant.cpp:1419
#8  0x00007fb17cfbabf9 in Digikam::ImageModel::data(QModelIndex const&, int)
const () from /usr/lib/libdigikamdatabase.so.2
#9  0x00007fb17cfcbf0e in Digikam::ImageThumbnailModel::data(QModelIndex
const&, int) const () from /usr/lib/libdigikamdatabase.so.2
#10 0x00007fb17cfbf27d in
Digikam::ImageFilterModel::subSortLessThan(QModelIndex const&, QModelIndex
const&) const () from /usr/lib/libdigikamdatabase.so.2

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--- Comment #18 from Lars Karlsson <mintlars hotmail com>  2011-08-05 09:19:06 ---
Created an attachment (id=62566)
 --> (http://bugs.kde.org/attachment.cgi?id=62566)
New crash information added by DrKonqi

digikam (2.0.0) on KDE Platform 4.7.00 (4.7.0) using Qt 4.7.2

Reproducable in digikam 2.0.0 stable release. Also occurs when naming and
adding tags while viewing the "full image" (i.e. not just the face thumbnail).
Face detection was running in the background when crash occured.

-- Backtrace (Reduced):
#8  QVariant::QVariant (this=0xbf852594, p=...) at kernel/qvariant.cpp:1422
#9  0xb4a9b00f in QVariant::cmp (this=0xc9fd290, v=...) at
kernel/qvariant.cpp:2853
#10 0xb4aa143b in operator== (this=0xc9fd2a0, l=...) at
../../include/QtCore/../../src/corelib/kernel/qvariant.h:409
#11 QList<QVariant>::operator== (this=0xc9fd2a0, l=...) at
../../include/QtCore/../../src/corelib/tools/qlist.h:732
#12 0xb4a9c0ec in compare (a=0xc9fd2a0, b=0xbf8526b4) at
kernel/qvariant.cpp:380

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--- Comment #19 from Lars Karlsson <mintlars hotmail com>  2011-08-05 11:41:20 ---
After some tests I'm beginning to see a pattern on this crash that might be
helpful.

It seems more related to tagging than the face detection scanning. Here are the
tested situations and their results.

Case 1: Run Digikam and start face recognition scanning. While the scanning is
in progress, tag some photos = Crash

Case 2: Run Digikam and start tagging faces (in this case I manually add "tag
boxes" around untagged faces rather than using face recognition-proposals).
Start the face recognition scanning = Crash (notice that the crash does NOT
occur until the face scan step)

Case 3: Run Digikam and start scanning for faces. Abort the scan and start
tagging faces = Crash

This may explain why bug reports don't contain face recognition code. There
seem to be a bug manifesting itself only when face recognition-scanning and
tagging happens in the same session.

Hope this helps. It's a very annoying bug, so would be glad to have it fixed as
soon as possible.

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