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