https://issues.dlang.org/show_bug.cgi?id=2225

Mathias LANG <pro.mathias.lang@gmail.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |pro.mathias.lang@gmail.com
         Resolution|---                         |FIXED

--- Comment #1 from Mathias LANG <pro.mathias.lang@gmail.com> ---
This has been fixed with all the visibility fixes.
Nowadays this yields:
> foo.d(6): Deprecation: b.Outer.Inner is not visible from module foo

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