Returning the address of a reference return value in @safe code - 2.072 regression?

[Johan Engelen via Digitalmars-d-learn]

This code compiles with 2.071, but not with 2.072 nor 2.073:
```
     struct S {
         int i;

         auto ref foo() @safe {
             return i;
         }

         auto bar() @safe {
             return &foo(); // <-- Error
         }
     }

     void main() {
         auto s = S();
         s.bar();
     }
```
The error is: "cannot take address of ref return of this.foo() in 
@safe function bar".

Is this a compiler regression, or is it a bug in the D code?

https://issues.dlang.org/show_bug.cgi?id=17213

Thanks,
   Johan