Module:No globals

local mt = getmetatable(_G) or {} local oldIndex = mt.__index or function return nil end mt.__index = function(t, k)	if k ~= 'name' and k ~= 'arg' then error('Tried to read nil global ' .. tostring(k), 2) end return oldIndex(t, k) end local oldNewindex = mt.__newindex or rawset function mt.__newindex(t, k, v)	if k ~= 'name' and k ~= 'arg' then error('Tried to write global ' .. tostring(k), 2) end oldNewindex(t, k, v) end setmetatable(_G, mt)