alt Hacker NewsDo the math yourself: A bug is picked up 2 week after commit. In the meantime, a good 4096+ commits have happened since. You are looking for the pathological case, at +- 12 commits.
Do you think each and every one of those are going to be "good" commits, commits that still "compile" or function. Possible, but unlikely given the insane velocity.
I mean, if you have sufficiently well developed CI, all of those commits will 100% function. That's a part of even allowing the commit to go through.