No. The complete select+code blocks is not atomic, so the select may
see that closedchan is not closed, execute the default case, but in the
mean time closedchan has been closed by someone else. Bang!
On Mon, 2017-11-06 at 16:59 -0800, Albert Tedja wrote:
> Since closing an already closed channel creates a panic, does this
> mean
> then I can do this to make sure that the channel is closed only once?
>
>
> select {
> case <- closedchan:
> default:
> close(closedchan)
> }
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