Bug 337258

Application: digikam (4.1.0)
KDE Platform Version: 4.13.2
Qt Version: 4.8.6
Operating System: Linux 3.13.0-24-generic x86_64
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Just switched albums, and tried to select all photos.

It happens to me occasionally, no real pattern on this.

The crash does not seem to be reproducible.

-- Backtrace:
Application: digiKam (digikam), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
To enable execution of this file add
	add-auto-load-safe-path /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py
line to your configuration file "/home/msylw/.gdbinit".
To completely disable this security protection add
	set auto-load safe-path /
line to your configuration file "/home/msylw/.gdbinit".
For more information about this security protection see the
"Auto-loading safe path" section in the GDB manual.  E.g., run from the shell:
	info "(gdb)Auto-loading safe path"
[Current thread is 1 (Thread 0x7fa3e7820ac0 (LWP 22340))]

Thread 10 (Thread 0x7fa3c3355700 (LWP 22342)):
#0  0x00007fa3e0967fbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa3c7f00248 in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007fa3dc78c182 in start_thread (arg=0x7fa3c3355700) at pthread_create.c:312
#3  0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7fa3bc976700 (LWP 22343)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa3e1756816 in wait (time=18446744073709551615, this=0x1f2b150) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x1f2b060, mutex=mutex@entry=0x1f2b058, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000000005e4cee in Digikam::ScanController::run (this=0x1f2add0) at /build/buildd/digikam-4.1.0/core/digikam/database/scancontroller.cpp:725
#4  0x00007fa3e175632f in QThreadPrivate::start (arg=0x1f2add0) at thread/qthread_unix.cpp:349
#5  0x00007fa3dc78c182 in start_thread (arg=0x7fa3bc976700) at pthread_create.c:312
#6  0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7fa3b7fff700 (LWP 22344)):
#0  0x00007fa3dc78e569 in __GI___pthread_mutex_lock (mutex=0x7fa3b0000a60) at ../nptl/pthread_mutex_lock.c:125
#1  0x00007fa3d98f2991 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3d98b0f99 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa3d98b10ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa3e18857be in QEventDispatcherGlib::processEvents (this=0x7fa3b00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#5  0x00007fa3e18570af in QEventLoop::processEvents (this=this@entry=0x7fa3b7ffeae0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fa3e18573a5 in QEventLoop::exec (this=this@entry=0x7fa3b7ffeae0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007fa3e1753c5f in QThread::exec (this=this@entry=0x1f28fc0) at thread/qthread.cpp:537
#8  0x00007fa3e1838823 in QInotifyFileSystemWatcherEngine::run (this=0x1f28fc0) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007fa3e175632f in QThreadPrivate::start (arg=0x1f28fc0) at thread/qthread_unix.cpp:349
#10 0x00007fa3dc78c182 in start_thread (arg=0x7fa3b7fff700) at pthread_create.c:312
#11 0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fa3b77fe700 (LWP 22349)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa3e1756816 in wait (time=18446744073709551615, this=0x2205d20) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2208fe0, mutex=mutex@entry=0x2208fd8, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007fa3e4eb5d9a in Digikam::ParkingThread::run (this=0x2208fc0) at /build/buildd/digikam-4.1.0/core/libs/threads/threadmanager.cpp:119
#4  0x00007fa3e175632f in QThreadPrivate::start (arg=0x2208fc0) at thread/qthread_unix.cpp:349
#5  0x00007fa3dc78c182 in start_thread (arg=0x7fa3b77fe700) at pthread_create.c:312
#6  0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7fa3b5de8700 (LWP 22350)):
#0  0x00007fa3e09666bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa3d98f1c20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3d98b0b14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa3d98b0f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa3d98b10ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa3e18857be in QEventDispatcherGlib::processEvents (this=0x7fa3ac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fa3e18570af in QEventLoop::processEvents (this=this@entry=0x7fa3b5de7ae0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fa3e18573a5 in QEventLoop::exec (this=this@entry=0x7fa3b5de7ae0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fa3e1753c5f in QThread::exec (this=this@entry=0x25c24d0) at thread/qthread.cpp:537
#9  0x00007fa3e1838823 in QInotifyFileSystemWatcherEngine::run (this=0x25c24d0) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007fa3e175632f in QThreadPrivate::start (arg=0x25c24d0) at thread/qthread_unix.cpp:349
#11 0x00007fa3dc78c182 in start_thread (arg=0x7fa3b5de8700) at pthread_create.c:312
#12 0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fa3a2530700 (LWP 22356)):
#0  0x00007fa3e09666bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa3d98f1c20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3d98b0b14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa3d98b0f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa3d98b10ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa3e18857be in QEventDispatcherGlib::processEvents (this=0x7fa39c005640, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fa3e18570af in QEventLoop::processEvents (this=this@entry=0x7fa3a252faa0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fa3e18573a5 in QEventLoop::exec (this=this@entry=0x7fa3a252faa0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fa3e4eb5463 in Digikam::WorkerObjectRunnable::run (this=0x5bd5b80) at /build/buildd/digikam-4.1.0/core/libs/threads/threadmanager.cpp:196
#9  0x00007fa3e1749fee in QThreadPoolThread::run (this=0x37c9010) at concurrent/qthreadpool.cpp:108
#10 0x00007fa3e175632f in QThreadPrivate::start (arg=0x37c9010) at thread/qthread_unix.cpp:349
#11 0x00007fa3dc78c182 in start_thread (arg=0x7fa3a2530700) at pthread_create.c:312
#12 0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fa39bfff700 (LWP 22360)):
#0  0x00007fa3e09666bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa3d98f1c20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3d98b0b14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa3d98b0f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa3d98b10ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa3e18857be in QEventDispatcherGlib::processEvents (this=0x7fa3840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fa3e18570af in QEventLoop::processEvents (this=this@entry=0x7fa39bffeaa0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fa3e18573a5 in QEventLoop::exec (this=this@entry=0x7fa39bffeaa0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fa3e4eb5463 in Digikam::WorkerObjectRunnable::run (this=0x538b1b0) at /build/buildd/digikam-4.1.0/core/libs/threads/threadmanager.cpp:196
#9  0x00007fa3e1749fee in QThreadPoolThread::run (this=0x38c24d0) at concurrent/qthreadpool.cpp:108
#10 0x00007fa3e175632f in QThreadPrivate::start (arg=0x38c24d0) at thread/qthread_unix.cpp:349
#11 0x00007fa3dc78c182 in start_thread (arg=0x7fa39bfff700) at pthread_create.c:312
#12 0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fa3827fc700 (LWP 22370)):
#0  0x00007fa3dc78e569 in __GI___pthread_mutex_lock (mutex=0x7fa35c000a60) at ../nptl/pthread_mutex_lock.c:125
#1  0x00007fa3d98f2991 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3d98b10d8 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa3e18857be in QEventDispatcherGlib::processEvents (this=0x7fa35c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007fa3e18570af in QEventLoop::processEvents (this=this@entry=0x7fa3827fbaa0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fa3e18573a5 in QEventLoop::exec (this=this@entry=0x7fa3827fbaa0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fa3e4eb5463 in Digikam::WorkerObjectRunnable::run (this=0x25e24c0) at /build/buildd/digikam-4.1.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007fa3e1749fee in QThreadPoolThread::run (this=0x38ca2e0) at concurrent/qthreadpool.cpp:108
#8  0x00007fa3e175632f in QThreadPrivate::start (arg=0x38ca2e0) at thread/qthread_unix.cpp:349
#9  0x00007fa3dc78c182 in start_thread (arg=0x7fa3827fc700) at pthread_create.c:312
#10 0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fa354ff9700 (LWP 22380)):
#0  0x00007fa3e0967fbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa3d98b0fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3d98b10ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa3e18857be in QEventDispatcherGlib::processEvents (this=0x7fa3240008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007fa3e18570af in QEventLoop::processEvents (this=this@entry=0x7fa354ff8aa0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fa3e18573a5 in QEventLoop::exec (this=this@entry=0x7fa354ff8aa0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fa3e4eb5463 in Digikam::WorkerObjectRunnable::run (this=0x628b1f0) at /build/buildd/digikam-4.1.0/core/libs/threads/threadmanager.cpp:196
#7  0x00007fa3e1749fee in QThreadPoolThread::run (this=0x7fa370013570) at concurrent/qthreadpool.cpp:108
#8  0x00007fa3e175632f in QThreadPrivate::start (arg=0x7fa370013570) at thread/qthread_unix.cpp:349
#9  0x00007fa3dc78c182 in start_thread (arg=0x7fa354ff9700) at pthread_create.c:312
#10 0x00007fa3e097530d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fa3e7820ac0 (LWP 22340)):
[KCrash Handler]
#6  0x00007fa3e1bb7dd0 in vtable for QtSharedPointer::ExternalRefCountData () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007fa3cc201dac in sqlite3MemCompare (pMem1=pMem1@entry=0x7fffa3d01190, pMem2=<optimized out>, pColl=0x10770298) at sqlite3.c:60484
#8  0x00007fa3cc201f63 in sqlite3VdbeRecordCompare (nKey1=18, pKey1=0x7fa3b83295df, pPKey2=pPKey2@entry=0x7fffa3d01490) at sqlite3.c:64162
#9  0x00007fa3cc216579 in sqlite3BtreeMovetoUnpacked (pCur=0x163dcf60, pIdxKey=0x7fffa3d01490, intKey=0, biasRight=<optimized out>, pRes=0x7fffa3d01480) at sqlite3.c:55077
#10 0x00007fa3cc23e9c5 in sqlite3VdbeExec (p=p@entry=0x130a4dd8) at sqlite3.c:70168
#11 0x00007fa3cc246ed7 in sqlite3Step (p=0x130a4dd8) at sqlite3.c:64828
#12 sqlite3_step (pStmt=<optimized out>) at sqlite3.c:64894
#13 0x00007fa3b6df911c in QSQLiteResultPrivate::fetchNext (this=this@entry=0x1391a980, values=..., idx=idx@entry=0, initialFetch=initialFetch@entry=true) at ../../../sql/drivers/sqlite/qsql_sqlite.cpp:235
#14 0x00007fa3b6df9e48 in QSQLiteResult::exec (this=0x130afb00) at ../../../sql/drivers/sqlite/qsql_sqlite.cpp:447
#15 0x00007fa3e7461b7d in QSqlQuery::exec (this=this@entry=0x7fffa3d019c8) at kernel/qsqlquery.cpp:949
#16 0x00007fa3e4e62f16 in Digikam::DatabaseCoreBackend::exec (this=0x1f24370, query=...) at /build/buildd/digikam-4.1.0/core/libs/database/core/databasecorebackend.cpp:1415
#17 0x00007fa3e4e62f9c in Digikam::DatabaseCoreBackend::execQuery (this=this@entry=0x1f24370, query=..., boundValue1=...) at /build/buildd/digikam-4.1.0/core/libs/database/core/databasecorebackend.cpp:1057
#18 0x00007fa3e4e64040 in Digikam::DatabaseCoreBackend::execQuery (this=this@entry=0x1f24370, sql=..., boundValue1=...) at /build/buildd/digikam-4.1.0/core/libs/database/core/databasecorebackend.cpp:1006
#19 0x00007fa3e4e64089 in Digikam::DatabaseCoreBackend::execSql (this=0x1f24370, sql=..., boundValue1=..., values=values@entry=0x7fffa3d01a10, lastInsertId=lastInsertId@entry=0x0) at /build/buildd/digikam-4.1.0/core/libs/database/core/databasecorebackend.cpp:903
#20 0x00007fa3e48160ee in Digikam::AlbumDB::getSetting (this=this@entry=0x1f45650, keyword=...) at /build/buildd/digikam-4.1.0/core/libs/database/albumdb.cpp:972
#21 0x00007fa3e4816a1c in Digikam::AlbumDB::getFilterSettings (this=0x1f45650, imageFilter=imageFilter@entry=0x7fffa3d01c60, videoFilter=videoFilter@entry=0x7fffa3d01c80, audioFilter=audioFilter@entry=0x7fffa3d01c70) at /build/buildd/digikam-4.1.0/core/libs/database/albumdb.cpp:1017
#22 0x00007fa3e482c16a in Digikam::CollectionScanner::loadNameFilters (this=this@entry=0x7fffa3d01e60) at /build/buildd/digikam-4.1.0/core/libs/database/collectionscanner.cpp:408
#23 0x00007fa3e482c8a3 in Digikam::CollectionScanner::mainEntryPoint (this=this@entry=0x7fffa3d01e60, complete=complete@entry=false) at /build/buildd/digikam-4.1.0/core/libs/database/collectionscanner.cpp:806
#24 0x00007fa3e482ef24 in Digikam::CollectionScanner::scanFile (this=this@entry=0x7fffa3d01e60, fi=..., albumId=236, imageId=imageId@entry=11569, mode=mode@entry=Digikam::CollectionScanner::NormalScan) at /build/buildd/digikam-4.1.0/core/libs/database/collectionscanner.cpp:767
#25 0x00007fa3e482f153 in Digikam::CollectionScanner::scanFile (this=this@entry=0x7fffa3d01e60, info=..., mode=Digikam::CollectionScanner::NormalScan) at /build/buildd/digikam-4.1.0/core/libs/database/collectionscanner.cpp:762
#26 0x00000000005e40ad in Digikam::ScanController::scannedInfo (this=0x1f2add0, filePath=...) at /build/buildd/digikam-4.1.0/core/digikam/database/scancontroller.cpp:560
#27 0x000000000053530a in Digikam::KipiImageInfo::KipiImageInfo (this=0xa52dec0, interface=<optimized out>, url=...) at /build/buildd/digikam-4.1.0/core/utilities/kipiiface/kipiimageinfo.cpp:85
#28 0x000000000053e11e in Digikam::KipiInterface::info (this=0x4814dd0, url=...) at /build/buildd/digikam-4.1.0/core/utilities/kipiiface/kipiinterface.cpp:175
#29 0x00007fa3545c7d95 in attribute (name=..., this=0xa52dea0) at /build/buildd/digikam-4.1.0/extra/kipi-plugins/common/libkipiplugins/tools/kpimageinfo.cpp:73
#30 hasAttribute (name=..., this=0xa52dea0) at /build/buildd/digikam-4.1.0/extra/kipi-plugins/common/libkipiplugins/tools/kpimageinfo.cpp:100
#31 KIPIPlugins::KPImageInfo::hasLatitude (this=this@entry=0x7fffa3d02020) at /build/buildd/digikam-4.1.0/extra/kipi-plugins/common/libkipiplugins/tools/kpimageinfo.cpp:387
#32 0x00007fa32065e638 in KIPIGPSSyncPlugin::KipiImageItem::loadImageData (this=this@entry=0xa52dd90, fromInterface=fromInterface@entry=true, fromFile=fromFile@entry=false) at /build/buildd/digikam-4.1.0/extra/kipi-plugins/gpssync/kipiimageitem.cpp:195
#33 0x00007fa32065378f in KIPIGPSSyncPlugin::GPSSyncDialog::setImages (this=this@entry=0x11458ff0, images=...) at /build/buildd/digikam-4.1.0/extra/kipi-plugins/gpssync/gpssyncdialog.cpp:625
#34 0x00007fa32065c136 in KIPIGPSSyncPlugin::Plugin_GPSSync::slotGPSSync (this=<optimized out>) at /build/buildd/digikam-4.1.0/extra/kipi-plugins/gpssync/plugin_gpssync.cpp:155
#35 0x00007fa3e186c87a in QMetaObject::activate (sender=sender@entry=0x499a070, m=m@entry=0x7fa3e2cf4de0 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffa3d02290) at kernel/qobject.cpp:3539
#36 0x00007fa3e2244a62 in QAction::triggered (this=this@entry=0x499a070, _t1=false) at .moc/release-shared/moc_qaction.cpp:276
#37 0x00007fa3e2246433 in QAction::activate (this=this@entry=0x499a070, event=event@entry=QAction::Trigger) at kernel/qaction.cpp:1257
#38 0x00007fa3e2674489 in QMenuPrivate::activateCausedStack (this=this@entry=0x42fc600, causedStack=..., action=action@entry=0x499a070, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1038
#39 0x00007fa3e26789b9 in QMenuPrivate::activateAction (this=0x42fc600, action=0x499a070, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1130
#40 0x00007fa3e267c385 in QMenu::mouseReleaseEvent (this=this@entry=0x43177c0, e=e@entry=0x7fffa3d029c0) at widgets/qmenu.cpp:2372
#41 0x00007fa3e300c665 in KMenu::mouseReleaseEvent (this=0x43177c0, e=0x7fffa3d029c0) at ../../kdeui/widgets/kmenu.cpp:464
#42 0x00007fa3e229a50a in QWidget::event (this=this@entry=0x43177c0, event=event@entry=0x7fffa3d029c0) at kernel/qwidget.cpp:8376
#43 0x00007fa3e267c7bb in QMenu::event (this=0x43177c0, e=0x7fffa3d029c0) at widgets/qmenu.cpp:2481
#44 0x00007fa3e224ae2c in QApplicationPrivate::notify_helper (this=this@entry=0x1d8a190, receiver=receiver@entry=0x43177c0, e=e@entry=0x7fffa3d029c0) at kernel/qapplication.cpp:4567
#45 0x00007fa3e22515dd in QApplication::notify (this=this@entry=0x7fffa3d03600, receiver=receiver@entry=0x43177c0, e=e@entry=0x7fffa3d029c0) at kernel/qapplication.cpp:4110
#46 0x00007fa3e2f55d1a in KApplication::notify (this=0x7fffa3d03600, receiver=0x43177c0, event=0x7fffa3d029c0) at ../../kdeui/kernel/kapplication.cpp:311
#47 0x00007fa3e18584dd in QCoreApplication::notifyInternal (this=0x7fffa3d03600, receiver=receiver@entry=0x43177c0, event=event@entry=0x7fffa3d029c0) at kernel/qcoreapplication.cpp:953
#48 0x00007fa3e2250d93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#49 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x43177c0, event=event@entry=0x7fffa3d029c0, alienWidget=alienWidget@entry=0x0, nativeWidget=nativeWidget@entry=0x43177c0, buttonDown=buttonDown@entry=0x7fa3e2d30318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#50 0x00007fa3e22c5cfc in QETWidget::translateMouseEvent (this=this@entry=0x43177c0, event=event@entry=0x7fffa3d02d10) at kernel/qapplication_x11.cpp:4568
#51 0x00007fa3e22c5269 in QApplication::x11ProcessEvent (this=0x7fffa3d03600, event=event@entry=0x7fffa3d02d10) at kernel/qapplication_x11.cpp:3627
#52 0x00007fa3e22ecb02 in x11EventSourceDispatch (s=0x1d8f350, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#53 0x00007fa3d98b0e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007fa3d98b1048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#55 0x00007fa3d98b10ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#56 0x00007fa3e18857a1 in QEventDispatcherGlib::processEvents (this=0x1cb9be0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#57 0x00007fa3e22ecbb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#58 0x00007fa3e18570af in QEventLoop::processEvents (this=this@entry=0x7fffa3d030e0, flags=...) at kernel/qeventloop.cpp:149
#59 0x00007fa3e18573a5 in QEventLoop::exec (this=this@entry=0x7fffa3d030e0, flags=...) at kernel/qeventloop.cpp:204
#60 0x00007fa3e185cb79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#61 0x00007fa3e224937c in QApplication::exec () at kernel/qapplication.cpp:3828
#62 0x0000000000494fd0 in main (argc=<optimized out>, argv=<optimized out>) at /build/buildd/digikam-4.1.0/core/digikam/main/main.cpp:236

Reported using DrKonqi