Application: baloo_file (5.18.0)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-22-generic x86_64
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
- What I was doing when the application crashed: I was using TeXmaker's built in pdf viewer. 
It sometimes crashes when I try moving an icon on the desktop (usually at start up or after my laptop wakes up) or sometimes when working with a pdf file. It started a few weeks ago but has recently been happening more frequently.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Baloo File Indexing Daemon (baloo_file), signal: Bus error
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faa5a3a28c0 (LWP 1516))]

Thread 2 (Thread 0x7fa90f2e8700 (LWP 1840)):
#0  0x00007faa584a8e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007faa5567931c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faa5567942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faa590dea9b in QEventDispatcherGlib::processEvents (this=0x7fa9080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007faa59085dea in QEventLoop::exec (this=this@entry=0x7fa90f2e7bc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x0000000000420cd8 in Baloo::FileContentIndexer::run (this=0x16afe80) at ../../../src/file/filecontentindexer.cpp:71
#6  0x00007faa58ea4343 in QThreadPoolThread::run (this=0x1763e60) at thread/qthreadpool.cpp:93
#7  0x00007faa58ea784e in QThreadPrivate::start (arg=0x1763e60) at thread/qthread_unix.cpp:331
#8  0x00007faa57b0b6fa in start_thread (arg=0x7fa90f2e8700) at pthread_create.c:333
#9  0x00007faa584b4b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7faa5a3a28c0 (LWP 1516)):
[KCrash Handler]
#6  mdb_page_search_root (mc=mc@entry=0x7ffce33c99e0, key=key@entry=0x7ffce33c9db0, flags=flags@entry=0) at mdb.c:5271
#7  0x00007faa56bdf0c8 in mdb_page_search (mc=mc@entry=0x7ffce33c99e0, key=key@entry=0x7ffce33c9db0, flags=flags@entry=0) at mdb.c:5436
#8  0x00007faa56bdf7a5 in mdb_cursor_set (mc=mc@entry=0x7ffce33c99e0, key=key@entry=0x7ffce33c9db0, data=data@entry=0x7ffce33c9dc0, op=op@entry=MDB_SET, exactp=exactp@entry=0x7ffce33c99dc) at mdb.c:5893
#9  0x00007faa56bdfe3c in mdb_get (txn=<optimized out>, dbi=<optimized out>, key=key@entry=0x7ffce33c9db0, data=data@entry=0x7ffce33c9dc0) at mdb.c:5565
#10 0x00007faa5957bf78 in Baloo::PositionDB::get (this=this@entry=0x7ffce33c9e90, term=...) at ../../../src/engine/positiondb.cpp:92
#11 0x00007faa5958e9a4 in Baloo::WriteTransaction::commit (this=<optimized out>) at ../../../src/engine/writetransaction.cpp:299
#12 0x00007faa59586032 in Baloo::Transaction::commit (this=this@entry=0x7ffce33c9f20) at ../../../src/engine/transaction.cpp:262
#13 0x000000000042a02b in Baloo::MetadataMover::moveFileMetadata (this=0x16c2040, from=..., to=...) at ../../../src/file/metadatamover.cpp:58
#14 0x00007faa590b6e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffce33ca080, r=0x7ffce33ca740, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#15 QMetaObject::activate (sender=sender@entry=0x16c7540, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=7, argv=argv@entry=0x7ffce33ca080) at kernel/qobject.cpp:3698
#16 0x00007faa590b77d7 in QMetaObject::activate (sender=sender@entry=0x16c7540, m=m@entry=0x644cc0 <KInotify::staticMetaObject>, local_signal_index=local_signal_index@entry=7, argv=argv@entry=0x7ffce33ca080) at kernel/qobject.cpp:3578
#17 0x000000000042aaba in KInotify::moved (this=this@entry=0x16c7540, _t1=..., _t2=...) at ./moc_kinotify.cpp:330
#18 0x000000000042cbff in KInotify::slotEvent (this=<optimized out>, socket=<optimized out>) at ../../../src/file/kinotify.cpp:421
#19 0x00007faa590b6e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffce33ca310, r=0x16c7540, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#20 QMetaObject::activate (sender=sender@entry=0x16b8d20, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffce33ca310) at kernel/qobject.cpp:3698
#21 0x00007faa590b77d7 in QMetaObject::activate (sender=sender@entry=0x16b8d20, m=m@entry=0x7faa592d1780 <QSocketNotifier::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffce33ca310) at kernel/qobject.cpp:3578
#22 0x00007faa5913651e in QSocketNotifier::activated (this=this@entry=0x16b8d20, _t1=13) at .moc/moc_qsocketnotifier.cpp:134
#23 0x00007faa590c347b in QSocketNotifier::event (this=0x16b8d20, e=<optimized out>) at kernel/qsocketnotifier.cpp:260
#24 0x00007faa5908860c in QCoreApplication::notify (event=0x7ffce33ca3d0, receiver=0x16b8d20, this=0x7ffce33ca6a0) at kernel/qcoreapplication.cpp:1038
#25 QCoreApplication::notifyInternal (this=0x7ffce33ca6a0, receiver=0x16b8d20, event=event@entry=0x7ffce33ca3d0) at kernel/qcoreapplication.cpp:965
#26 0x00007faa590def45 in QCoreApplication::sendEvent (event=0x7ffce33ca3d0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#27 socketNotifierSourceDispatch (source=0x165d540) at kernel/qeventdispatcher_glib.cpp:101
#28 0x00007faa55679127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007faa55679380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007faa5567942c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007faa590dea7f in QEventDispatcherGlib::processEvents (this=0x165d520, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#32 0x00007faa59085dea in QEventLoop::exec (this=this@entry=0x7ffce33ca5e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#33 0x00007faa5908de8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#34 0x000000000041698c in main (argc=1, argv=<optimized out>) at ../../../src/file/main.cpp:88

Reported using DrKonqi