The Importance of a Get Bisect

The Rust team makes sure that they only ever are using an official like stable release of Rust with all of their builds. The Bisect case is it's definitely a good example, especially if you plan to add new features, change them and maybe take them out at the same time. If nobody has set up a bootstrap procedure for you, like a well-defined one, your only option would be to open the Git log or ask on IRC.