std.container.Array deep-copy?

[qznc via Digitalmars-d-learn]

On Thursday, 9 October 2014 at 21:14:46 UTC, qznc wrote:
> How can you deep-copy a std.container.Array instance?

Ok, the deep-copy problem already got resolved on reddit: Use dup.

However, the error is still open. You cannot give an Array!X
argument to constructor/replace/insertBefore of Array!X instances?