On Thu, 07 Jul 2016 14:19:17 +0000
Jan Mercl <0xj...@gmail.com> wrote:
> > for k, m[k] := range m {...}
> >
> > Apparently is valid Go syntax, however what are the semantics
> > behind this?
>
> It is not a valid Go syntax. The short variable declaration syntax
> requires variable names on its left side. You probably meant '='
> instead of ':='.
>
> > If another Goroutine calls delete(...)
>
> Concurrent map updates and reading is a data race. Within the same
> goroutine it works, but I did not expect the result I've got:
> https://play.golang.org/p/ECno0PVdBF
>
> It seems like a bug to me.
Indeed, given that "normal" iteration -- using a variable for the
map values -- works as one would expect it to:
https://play.golang.org/p/phmsYAov7S
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