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David Burgess wrote:
> while (1) do
>   row = CUR:Fetch()
>   if not row then
>      break;
>   end
> -- CUR is garbage collected before next fetch
> -- during dostuff()
>   dostuff();
> end

Unless dostuff overwrites CUR the GC will not collect it.
The GC will only collect unreachable items.  And the object
stored in CUR is definitely reachable...

Ciao, ET.