[Issue 22981] Another forward reference bug involving a string mixin

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22981

Basile-z <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |b2.temp at gmx.com

--- Comment #4 from Basile-z <b2.temp at gmx.com> ---
I think that the compiler should perform a "pre-dsymbolsem" pass in aggregate
decls, that pass would only target `enum` and other `static` declarations.

That could kill the fake cycle on `E` and other similar bugs.

--