Reply to Zoran,
I don't think it is restrictive if the compiler prevented a situation that would otherwise lead to a run-time error anyway, or worse, weird and confusing run-time behavior. In my case, if the compiler couldn't SAFELY handle a reference to the argument n outside the enclosing function, then, IMO, RETURNING it (but not otherwise using it) should be flagged a compilation error. Admittedly, detecting this is a bit more involved for the compiler, but not at all restrictive for the user.
D2.0 handles it all correctly. D1.0 follows the "hear is a gun, there is your foot" mentality with regards to this. In general D is *not* a safe language and that is by intent.
