First and most fundamental question
Everyone seems to just assuming that upgrading a piece of code is normal so they just ask themselves "what kind of bureaucracy can be introduce to stop this from happening?". To me, that's the wrong question.
The first question is "Why are you changing that library?" Was it to fix a critical bug? Was it to add another component?
The next question is "What kind of test strategy are you using to verify that the library functionality hasn't changed?"
The third question is "If you're adding new functionality then why does it need to be in this existing library?"
This practice of constantly changing code, often for trivial or cosmetic reasons is commonplace these days , as is the practice of so integrating the build process that its not easy to isolate functional modules for testing. Its seems that its common practice to just build something and if it compiles and seems to work then it gets released without any further testing. This is asking for trouble and certainly explains why, for example, Windows is so unstable. Since Microsoft has started to 'embrace' open source by taking over GitHub I've noticed this kind of squirt and pray methodology all over the place -- its not that the code is 'complicated', its because we've failed to make it simple. Errors will creep in and its a crapshoot whether we notice them before they cause any damage.
Obviously, what the big monopolies would like would be to add keys to everything with them as the keyholders. I daresay that everyone will be duly surprised by this in due course.