kubuntu 15.04 - baloo_file 100% CPU

(gdb) t a a bt

Thread 3 (Thread 0x7f97fc24f700 (LWP 3214)):
#0  0x00007f980c47a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f980b362b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f980b36464f in xcb_wait_for_event ()
   from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f97fe173099 in ?? ()
   from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007f980cd11b0e in ?? ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f980c1686aa in start_thread (arg=0x7f97fc24f700)
    at pthread_create.c:333
#6  0x00007f980c485eed in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f97fae93700 (LWP 3650)):
#0  0x00007f980c47c743 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f980cee189f in ?? ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f980cd11b0e in ?? ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f980c1686aa in start_thread (arg=0x7f97fae93700)
    at pthread_create.c:333
#4  0x00007f980c485eed in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f980fbd3800 (LWP 3210)):
#0  0x00007f980eba8a6d in ChertTable::find_in_block(unsigned char const*, Key, bool, int) () from /usr/lib/libxapian.so.22
#1  0x00007f980eba9db3 in ChertTable::find(Cursor*) const ()
   from /usr/lib/libxapian.so.22
#2  0x00007f980eb83a31 in ChertCursor::find_entry(std::string const&) ()
   from /usr/lib/libxapian.so.22
#3  0x00007f980ebb07b3 in ?? () from /usr/lib/libxapian.so.22
#4  0x00007f980ebb40d3 in ?? () from /usr/lib/libxapian.so.22
#5  0x00007f980eb9422a in ?? () from /usr/lib/libxapian.so.22
#6  0x00007f980eb04a62 in Xapian::Document::Internal::get_value(unsigned int) const () from /usr/lib/libxapian.so.22
---Type <return> to continue, or q <return> to quit---
#7  0x00007f980eb04a7c in Xapian::Document::get_value(unsigned int) const ()
   from /usr/lib/libxapian.so.22
#8  0x00007f980eecc10a in Baloo::XapianDocument::value(int) const ()
   from /usr/lib/x86_64-linux-gnu/libKF5BalooXapian.so.1
#9  0x000000000041e4c4 in Baloo::BasicIndexingQueue::shouldIndex(Baloo::FileMapping&, QString const&) const ()
#10 0x000000000041f0a5 in Baloo::BasicIndexingQueue::process(Baloo::FileMapping&, QFlags<Baloo::UpdateDirFlag>) ()
#11 0x000000000041f65c in Baloo::BasicIndexingQueue::processNextIteration()
    ()
#12 0x00007f980cf8173a in QObject::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f980d859b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f980d85f000 in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f980cf4fc2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f980cf51c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f980cfa8843 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f9806e52c3d in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f9806e52f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f9806e52fcc in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f980cfa8c57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f980cf4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f980cf5502c in QCoreApplication::exec() ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x0000000000417477 in main ()
(gdb)