Application: dolphin (15.12.3)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-36-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Just after reboot, openned up Dolphin, navigated to a specific folder, and crashed.	No other applications running.

The crash can be reproduced every time.

-- Backtrace:
Application: Dolphin (dolphin), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2d4ea1a8c0 (LWP 6150))]

Thread 3 (Thread 0x7f2d42118700 (LWP 6152)):
#0  0x00007f2d61837e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f2d5802c39c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2d5802c4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2d5c640a9b in QEventDispatcherGlib::processEvents (this=0x7f2d3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f2d5c5e7dea in QEventLoop::exec (this=this@entry=0x7f2d42117d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f2d5c4048a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f2d5c40984e in QThreadPrivate::start (arg=0x1b7fbd0) at thread/qthread_unix.cpp:331
#7  0x00007f2d58bb76fa in start_thread (arg=0x7f2d42118700) at pthread_create.c:333
#8  0x00007f2d61843b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f2d4c09f700 (LWP 6151)):
#0  0x00007f2d61837e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f2d55fc3c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f2d55fc58d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f2d4e3f1629 in QXcbEventReader::run (this=0x16c0da0) at qxcbconnection.cpp:1253
#4  0x00007f2d5c40984e in QThreadPrivate::start (arg=0x16c0da0) at thread/qthread_unix.cpp:331
#5  0x00007f2d58bb76fa in start_thread (arg=0x7f2d4c09f700) at pthread_create.c:333
#6  0x00007f2d61843b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f2d4ea1a8c0 (LWP 6150)):
[KCrash Handler]
#6  0x00007f2d61772418 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#7  0x00007f2d6177401a in __GI_abort () at abort.c:89
#8  0x00007f2d54f15002 in mdb_assert_fail (env=0x1cf0670, expr_txt=expr_txt@entry=0x7f2d54f16adb "i > 0", func=func@entry=0x7f2d54f17380 <__func__.7798> "mdb_page_search_root", line=line@entry=5291, file=0x7f2d54f16a40 "mdb.c") at mdb.c:1481
#9  0x00007f2d54f0bf47 in mdb_page_search_root (mc=mc@entry=0x7ffd90c81480, key=key@entry=0x7ffd90c81840, flags=flags@entry=0) at mdb.c:5291
#10 0x00007f2d54f0c0c8 in mdb_page_search (mc=mc@entry=0x7ffd90c81480, key=key@entry=0x7ffd90c81840, flags=flags@entry=0) at mdb.c:5436
#11 0x00007f2d54f0c7a5 in mdb_cursor_set (mc=mc@entry=0x7ffd90c81480, key=key@entry=0x7ffd90c81840, data=data@entry=0x7ffd90c81850, op=op@entry=MDB_SET, exactp=exactp@entry=0x7ffd90c8147c) at mdb.c:5893
#12 0x00007f2d54f0ce3c in mdb_get (txn=<optimized out>, dbi=<optimized out>, key=key@entry=0x7ffd90c81840, data=data@entry=0x7ffd90c81850) at mdb.c:5565
#13 0x00007f2d5941e718 in Baloo::DocumentDataDB::get (this=this@entry=0x7ffd90c81880, docId=docId@entry=193655226358562862) at /build/baloo-kf5-wIK3t6/baloo-kf5-5.18.0/src/engine/documentdatadb.cpp:83
#14 0x00007f2d59430cde in Baloo::Transaction::documentData (this=this@entry=0x7ffd90c81910, id=id@entry=193655226358562862) at /build/baloo-kf5-wIK3t6/baloo-kf5-5.18.0/src/engine/transaction.cpp:144
#15 0x00007f2d5f68cf69 in Baloo::File::load (this=this@entry=0x7ffd90c81a60) at /build/baloo-kf5-wIK3t6/baloo-kf5-5.18.0/src/lib/file.cpp:111
#16 0x00007f2d5fc22796 in Baloo::FileFetchJob::doStart (this=0x1e0b900) at /build/baloo-widgets-A4yGxj/baloo-widgets-15.12.3/src/filefetchjob.cpp:58
#17 0x00007f2d5c619ea1 in QObject::event (this=0x1e0b900, e=<optimized out>) at kernel/qobject.cpp:1239
#18 0x00007f2d5d0ed05c in QApplicationPrivate::notify_helper (this=this@entry=0x16a93e0, receiver=receiver@entry=0x1e0b900, e=e@entry=0x1e0e310) at kernel/qapplication.cpp:3716
#19 0x00007f2d5d0f2516 in QApplication::notify (this=0x7ffd90c82170, receiver=0x1e0b900, e=0x1e0e310) at kernel/qapplication.cpp:3499
#20 0x00007f2d5c5ea62b in QCoreApplication::notifyInternal (this=0x7ffd90c82170, receiver=0x1e0b900, event=event@entry=0x1e0e310) at kernel/qcoreapplication.cpp:965
#21 0x00007f2d5c5eca26 in QCoreApplication::sendEvent (event=0x1e0e310, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x16a7870) at kernel/qcoreapplication.cpp:1593
#23 0x00007f2d5c5ecf08 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#24 0x00007f2d5c640673 in postEventSourceDispatch (s=0x16de240) at kernel/qeventdispatcher_glib.cpp:271
#25 0x00007f2d5802c1a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f2d5802c400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f2d5802c4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f2d5c640a7f in QEventDispatcherGlib::processEvents (this=0x16e3960, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#29 0x00007f2d5c5e7dea in QEventLoop::exec (this=this@entry=0x7ffd90c82040, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#30 0x00007f2d5c5efe8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#31 0x00007f2d5cb33c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#32 0x00007f2d5d0e9495 in QApplication::exec () at kernel/qapplication.cpp:2976
#33 0x00007f2d61b63e2b in kdemain (argc=1, argv=<optimized out>) at /build/dolphin-HvGmRr/dolphin-15.12.3/src/main.cpp:150
#34 0x00007f2d6175d830 in __libc_start_main (main=0x400710 <main(int, char**)>, argc=1, argv=0x7ffd90c822f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd90c822e8) at ../csu/libc-start.c:291
#35 0x0000000000400749 in _start ()

Reported using DrKonqi