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On 1 March 2015 at 20:19, Roberto Ierusalimschy <> wrote:
> Sorry... The "untyped" assignment to 'ra' is safe. The one to 'ra + 3'
> (to the external index) is not; FORPREP does not set this value and,
> moreover, the loop body can change it to any value. (The behavior is
> undefined when the code does such changes, but Lua should not crash.)

Okay, understood.