Understanding DIP 1000 semantics -- Where's the bug?

[ag0aep6g]

On Sunday, 22 September 2019 at 17:26:20 UTC, Mike Franklin wrote:
> Interestingly, taking the address of a `ref` in `@safe` code is 
> prevented, but only when compiling *without* -preview=dip1000.  
> See https://run.dlang.io/is/GArFzk
>
> That's seems like a bug to me.

That's just the normal pre-DIP-1000 error you get when taking the 
address of any local (`ref` or not). Allowing `&some_local` is 
pretty much the point of DIP 1000, so it's expected that the old 
error doesn't appear anymore.

There is a bug for sure, though. If `ref` implies `scope`, there 
should be a new error ("cannot take address of scope parameter"). 
If `scope` is not implied, it's ok that the function compiles, 
but then it shouldn't be possible to call it on a local.