[Issue 19754] cast() sometimes yields lvalue, sometimes yields rvalue

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19754

--- Comment #16 from RazvanN <razvan.nitu1305 at gmail.com> ---
The root problem here is that dmd does optimizations and semantic analysis in
the same pass. Will try to fix this.

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