This seems pretty classic: * Five years ago a change causes a logic bug in a not super critical section of code. * Three and a half years later a change in an

This seems pretty classic: * Five years ago a change causes a logic bug in a not super critical section of code. * Three and a half years later a change in an entirely different section of code makes the section of code super critical at the same time it makes it exploitable. Bugs can happen in any of the places you are not looking without actually changing anything in those places. Your code is full of trip mines and you don't know where any of the wires are.