Hello, I am the Debian maintainer of the package Ktechlab. I received a bug report from Timo Juhani Lindfors, which is archived at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=599920
Interestingly, Timo Juhani Lindfors made available two files to allow us to reproduce the crash or to watch it as a screen cast:
I cannot reproduce this crash with my computer which has an amd64 architecture.
Best regards, thank you for the fine job!