http://wiki.dlang.org/DIP25

[Andrei Alexandrescu via Digitalmars-d]

On 12/30/14 7:32 PM, Manu via Digitalmars-d wrote:
> void mayEscape(ref int x); // <-- may escape this ref arg
>
> void t()
> {
>    int onStack = 1;
>    mayEscape(onStack); // <- perfectly legal, and equally unsafe
> }

DIP25 puts this code in illegality. I don't think the proposal has been 
explicit about that, will fix. Thanks! -- Andrei