Re: Upvalue question

[Luiz Henrique de Figueiredo <lhf@...>]

>>   local s = 0
>>   for i=1,10000 do s=s+i end
>>   function f(x) return %s + x end
>
>This doesn't work in my interpreter (4.0)
>
>Transcript:
>
>> local s = 0
>> for i=1,10000 do s=s+i end
>error: attempt to perform arithmetic on global `s' (a nil value)
>stack traceback:
>   1:  main of string "for i=1,10000 do s=s+i end" at line 1

The 3 lines of code were supposed to be run in a file, not interactively.
When you run interactively, each line is a separate chunk and so 's' is
local in the first one, but global in the second one, hence the error.
--lhf