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On Wed, Jul 25, 2018, 6:46 AM Patrick Donnelly <batrick@batbytes.com> wrote:


     do
       local f, s, var = explist
       local <mark> s = s -- added!
       while true do
         ...

Am I missing something?

We're not talking about iteration in general, rather iterators and specifically the case where ownership of the resource is encapsulated within the iterator.