Memory leak in foreach

[Dein]

On Wednesday, 20 February 2019 at 09:31:30 UTC, Andrea Fontana 
wrote:
> This subtle bug[1] and its memory leak are still here because 
> my pull request[2] had no success.
>
> It worths noting that since each() in std.algorithm uses a 
> foreach+ref to iterate  structs[3], this memory leak probably 
> is silently affecting not only me :)
>
> I hope someone could fix this.
>
> [1] https://issues.dlang.org/show_bug.cgi?id=11934
> [2] https://github.com/dlang/dmd/pull/8437
> [3] 
> https://github.com/dlang/phobos/blob/master/std/algorithm/iteration.d#L983

That's not a memory leak, you are creating a GC array, the GC 
might never free the array its not deterministic. Use @nogc and 
staticArray() if you want to destructors to be called 
deterministically.