Application: dolphin (15.08.3)

Qt Version: 5.5.1
Operating System: Linux 4.5.0-2-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
- What I was doing when the application crashed:
I was trying to select all files and folders, and then remove a few from that selection, so I could drag and drop all of the selected items into one of those unselected folders.  Every time, when I unselect a folder, Dolphin crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3e1b794940 (LWP 13161))]

Thread 4 (Thread 0x7f3e1a232700 (LWP 13162)):
#0  0x00007f3e2f898dcd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f3e241fc382 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3e241fdff7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f3e1b529789 in QXcbEventReader::run (this=0x16a36b0) at qxcbconnection.cpp:1230
#4  0x00007f3e2a6797fe in QThreadPrivate::start (arg=0x16a36b0) at thread/qthread_unix.cpp:331
#5  0x00007f3e27168454 in start_thread (arg=0x7f3e1a232700) at pthread_create.c:334
#6  0x00007f3e2f8a1e5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f3e0e4aa700 (LWP 13163)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f3e12428693 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007f3e12427db7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3  0x00007f3e27168454 in start_thread (arg=0x7f3e0e4aa700) at pthread_create.c:334
#4  0x00007f3e2f8a1e5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f3e0d9da700 (LWP 13164)):
#0  QListData::end (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:109
#1  QList<QTimerInfo*>::constEnd (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:306
#2  QTimerInfoList::timerWait (this=0x7f3e08002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:386
#3  0x00007f3e2a8afe3e in timerSourcePrepareHelper (timeout=0x7f3e0d9d9ac4, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#4  timerSourcePrepare (source=<optimized out>, timeout=0x7f3e0d9d9ac4) at kernel/qeventdispatcher_glib.cpp:160
#5  0x00007f3e265da92d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f3e265db2cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f3e265db4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f3e2a8b0a5b in QEventDispatcherGlib::processEvents (this=0x7f3e080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#9  0x00007f3e2a857d6a in QEventLoop::exec (this=this@entry=0x7f3e0d9d9c80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#10 0x00007f3e2a674854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#11 0x00007f3e2a6797fe in QThreadPrivate::start (arg=0x18fbc50) at thread/qthread_unix.cpp:331
#12 0x00007f3e27168454 in start_thread (arg=0x7f3e0d9da700) at pthread_create.c:334
#13 0x00007f3e2f8a1e5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f3e1b794940 (LWP 13161)):
[KCrash Handler]
#6  0x00007f3e23137c3c in mdb_txn_commit () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#7  0x00007f3e23137c4a in mdb_txn_commit () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#8  0x00007f3e23137c4a in mdb_txn_commit () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#9  0x00007f3e23137c4a in mdb_txn_commit () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0
#10 0x00007f3e279cd4f6 in Baloo::Database::open(Baloo::Database::OpenMode) () from /usr/lib/x86_64-linux-gnu/libKF5BalooEngine.so.5
#11 0x00007f3e2d8f6306 in Baloo::File::load() () from /usr/lib/x86_64-linux-gnu/libKF5Baloo.so.5
#12 0x00007f3e2de92cb6 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5BalooWidgets.so.5
#13 0x00007f3e2a889e61 in QObject::event (this=0x1d25870, e=<optimized out>) at kernel/qobject.cpp:1239
#14 0x00007f3e2b35cffc in QApplicationPrivate::notify_helper (this=this@entry=0x16863e0, receiver=receiver@entry=0x1d25870, e=e@entry=0x1ecd180) at kernel/qapplication.cpp:3716
#15 0x00007f3e2b3624b6 in QApplication::notify (this=0x7fffe514bbe0, receiver=0x1d25870, e=0x1ecd180) at kernel/qapplication.cpp:3499
#16 0x00007f3e2a85a5ab in QCoreApplication::notifyInternal (this=0x7fffe514bbe0, receiver=0x1d25870, event=event@entry=0x1ecd180) at kernel/qcoreapplication.cpp:965
#17 0x00007f3e2a85c9a6 in QCoreApplication::sendEvent (event=0x1ecd180, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1684870) at kernel/qcoreapplication.cpp:1593
#19 0x00007f3e2a85ce88 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#20 0x00007f3e2a8b0633 in postEventSourceDispatch (s=0x16e7c60) at kernel/qeventdispatcher_glib.cpp:271
#21 0x00007f3e265db1a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f3e265db400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f3e265db4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f3e2a8b0a3f in QEventDispatcherGlib::processEvents (this=0x16de9a0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#25 0x00007f3e2a857d6a in QEventLoop::exec (this=this@entry=0x7fffe514bab0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#26 0x00007f3e2a85fe0c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#27 0x00007f3e2fbbaf34 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#28 0x00007f3e2f7d95f0 in __libc_start_main (main=0x400710 <main>, argc=1, argv=0x7fffe514bd68, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe514bd58) at libc-start.c:291
#29 0x0000000000400749 in _start ()

Reported using DrKonqi