[Issue 21929] delegates capture do not respect scoping

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21929

--- Comment #8 from deadalnix <deadalnix at gmail.com> ---
(In reply to a11e99z from comment #7)
> C++ byRef & byValue capturing is more viable.

You'll not that C++'s std::function will allocate on heap if you capture. The
equivalent code in C++ WILL allocate in a loop too.

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