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The lua 5.0.2 returns an error when using literal
strings in code like:

--first example
--second example

It doesn't allow a [[]] literal string to end with ]]]
(at least one ] character next to the two final
delimiter characters ]] -> this is the first example).
Also it doesn't allow the a pair of ] characters
between the string's delimiters (this is the second
code example). The _ characters are just for filling
(it's optional). Is this a language limitation or an
interpreter bug? The lua interpreter returns some
error messages like this one:
`)' expected near `]'


What is wrong with the next code?
setfenv(0, { some_global_var = 0}

Or this one?
t = { some_global_var = 0}
setfenv(0, t)

Both return message errors like this one:
lua: attempt to call a nil value
stack traceback:
        [C]: in function `print'
        x.lua:2: in main chunk
        [C]: ?

I just want to add some global variable to the global enviroment.

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