Re: Numeric for loop: Changing control variable REALLY dangerous?

[Lars Müller <appgurulars@...>]

    The current behavior in PUC Lua seems to be that modifying the loop
    control variable has no effect on the loop. I would not be surprised
    if LuaJIT was to apply optimizations that leverage the fact that you
    may not modify the loop control variable. Ideally the Lua compiler
    should emit a warning when it encounters modifications of the loop
    control variable. If you really need to modify the loop control
    variable, just create a local copy, which is more explicit, to spec
    and thus guaranteed to work, and just costs nothing but one line of
    code:
    
for i = 1, 10 do
     local i = i
     i = i + 42 -- perfectly fine
     print(i)
end

    You can avoid shadowing the loop control variable (which linters
    like Luacheck don't like) by rename one of the two variables.