Version:            (using Devel)
Installed from:    Compiled sources
OS:                Linux

Sometimes, when I hit ALT+F2, and start writing the application name, the run dialog crashes, there is backtrace:

Application: Run Command Interface (<unknown>), signal SIGSEGV
(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread 0x7f084a6b5740 (LWP 4424)]
[New Thread 0x413fc950 (LWP 4491)]
[New Thread 0x436a5950 (LWP 4428)]
[New Thread 0x42ea4950 (LWP 4427)]
[New Thread 0x426a3950 (LWP 4426)]
[New Thread 0x41ea2950 (LWP 4425)]
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[KCrash handler]
#5  0x00007f084a471922 in Interface::updateMatches ()
   from /usr/lib/libkdeinit4_krunner.so
#6  0x00007f084a47235c in Interface::qt_metacall ()
   from /usr/lib/libkdeinit4_krunner.so
#7  0x00007f08463c4474 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#8  0x00007f084a195d12 in Plasma::RunnerManager::matchesChanged ()
   from /usr/lib/libplasma.so.1
#9  0x00007f084a196895 in Plasma::RunnerManager::qt_metacall ()
   from /usr/lib/libplasma.so.1
#10 0x00007f08463bf11d in QObject::event () from /usr/lib/libQtCore.so.4
#11 0x00007f0843cac9bd in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#12 0x00007f0843cb466a in QApplication::notify () from /usr/lib/libQtGui.so.4
#13 0x00007f08482bac2b in KApplication::notify () from /usr/lib/libkdeui.so.5
#14 0x00007f08463b0141 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#15 0x00007f08463b0dea in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#16 0x00007f08463d88b3 in ?? () from /usr/lib/libQtCore.so.4
#17 0x00007f0840dd76fa in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#18 0x00007f0840ddadf0 in g_main_context_iterate ()
   from /usr/lib/libglib-2.0.so.0
#19 0x00007f0840ddaf8c in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#20 0x00007f08463d853f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#21 0x00007f0843d3c96f in ?? () from /usr/lib/libQtGui.so.4
#22 0x00007f08463aea52 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#23 0x00007f08463aebdd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#24 0x00007f08463b10ad in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#25 0x00007f084a474825 in kdemain () from /usr/lib/libkdeinit4_krunner.so
#26 0x00007f0841e7e18a in __libc_start_main () from /lib/libc.so.6
#27 0x00000000004008d9 in _start ()
#0  0x00007f0841efde01 in nanosleep () from /lib/libc.so.6

I hope, it helps. 
Rene Kliment(rene.kliment (at) gmail (dot) com)