rr (http://rr-project.org/ http://rr-project.org/) is a piece of magic. I've heard lots of people talk about using it in wild and awesome ways. The second par

rr (http://rr-project.org/ http://rr-project.org/) is a piece of magic. I've heard lots of people talk about using it in wild and awesome ways. The second part of a magic trick is to connect it to your audience. Making time-travel style debugging is... not easy, but possible. Making it relevant to people, across languages and other conceptual domains, is hard. If your next work is tackling this, good luck and godspeed :)