[Issue 21136] N sized array takes kN bytes in executable file

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21136

--- Comment #5 from Raoof Hajibagheran <raoofha at yahoo.com> ---
and another issue is that I'm only defining struct S and never use it but it
takes space anyway. but this is a minor issue for me.

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