One of the most painful aspects of a developer’s work cycle is trying to fix failures that show up on try, but which can’t be reproduced locally. When this happens, there were really only two options (neither of them nice): You could spam try with print debugging. But this isn’t very powerful, and takes forever to get feedback. You could request a loaner from releng. But this is a heavy handed process, and once you have the loaner it is very hard to get tests up and running. I’m pleas...
