A similar thing happened to me too, I would get some kind of internal error in a wrapped ARPACK and it would cause the entire python process to crash. It was r

A similar thing happened to me too, I would get some kind of internal error in a wrapped ARPACK and it would cause the entire python process to crash. It was reliable in that a given sequence of events would always trigger a crash, but not reliable in that we couldn't really alter those events to minimize things. We never bothered reporting it.