[Issue 21929] delegates capture do not respect scoping

[d-bugmail at puremagic.com]

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

--- Comment #3 from deadalnix <deadalnix at gmail.com> ---
(In reply to Vladimir Panteleev from comment #1)
> In JavaScript:
> 
> [...]
> 
> So, I don't think D's behavior is unexpected compared to other languages.
> 
> Note that if you change "var" to "let" in JS then it behaves closer as to
> what you may expect.
> 
> At this point this is part of the language and is not a bug, so I don't
> think the bugtracker is the proper place to post this.
> 
> The workaround in D is the same as in JavaScript (before "let"), pass the
> mutable values to the lambda so that their current values become part of the
> lambda's state (or create an outer lambda which does this).

This code is erroneous. In JS, var declare a variable at the function scope
level.

Try again declaring the variable using `let`, which creates a properly scoped
variable in JS and see how it goes.

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