You use a language with no particular specification and no particular set purpose, and are surprised that it changes between point releases? I guess he's never

You use a language with no particular specification and no particular set purpose, and are surprised that it changes between point releases? I guess he's never used PHP then. Languages divide reasonably cleanly into those that have no published semantics (formal or informal), those that have a published informal semantics, and those that have a published formal semantics. I use 'semantics' here to cover both the usual meaning and the semantic interpretation of syntactic constructs. On this continuum, there are very few with published formal semantics, and a huge number with no published specification whatsoever. I've heard proponents of these languages actually claim that "the compiler is the specification". So if you use a language where the world view is "we'll do whatever the hell we want and then the compiler decides what it means!" then you can hardly complain when it all gets a bit confusing. That's reason number 77,061 for me not using Ruby.