[Issue 14850] Concatenation of static arrays should have compile-time length

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=14850

--- Comment #4 from Nick Treleaven <nick at geany.org> ---
Also, concatenation of static arrays could be allowed with @nogc iff assigned
to a static array. Currently that errors.

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