Day 23 – Blin, it’s Christmas soon!

I’ve already mentioned Bisectable in one of the advent posts two years ago, but since then a lot has changed, so I think it’s time to give a brief history of the bisectable bot and its friends.

First of all, let’s define the problem that is being solved. Sometimes it happens that a commit introduces an unintended change in behavior (a bug). Usually we call that a regression, and in some cases the easiest way to figure out what went wrong and fix it is to first find which commit introduced the regression.

There are exactly 9000 commits between Rakudo 2015.12 and 2018.12, and even though it’s not over 9000, that’s still a lot.