Re: OpenBSD
Or, of course, the build tool chain changes even though the source hasn't. Maybe a compiler has been made "more intelligent" and optimises that old code in a different way, even with absolutely no other change in the environment. Maybe it optimised away a clever coding trick because it thinks the result will always be NULL when in fact it's a vital bit of code. The source remains the same even if the binary might be different from last time you compiled it.