Somehow I missed Eliot's version, but unsurprisingly he had exactly the same idea (use "last" not "stop" for hash). I'd still think bitXor: is preferable to bitOr, that is the standard way in almost all hash methods. But ...

BUT: I forgot about the super fallback in #=. That makes this discussion pretty much moot, because since

#(1 2 3) = (1 to: 3) "true"

is true, this must also be true:

#(1 2 3) hash = (1 to: 3) hash "must be true"

So the only proper fix IMHO is to remove #hash from Interval (or replace it with ^super hash and a proper comment)

- Bert -