--:Minify:--
local args={...}
local kernel=args[1]
kernel._G=_G

local function readonly(tbl)
    return setmetatable({}, {
        __index = function(_, key)
            local value = tbl[key]
            if type(value) == "table" then
                return readonly(value)
            end
            return value
        end,

        __newindex = function(t,k,v)
            if kernel.config.allowGlobalOverwrites or kernel.allowGlobalOverwrites then
                rawset(tbl,k,v)
                return
            end
            error("Attempt to modify global variable '"..k.."'",2)
        end,

        __pairs = function()
            local function iter(_, key)
                local nextKey, value = next(tbl, key)
                if type(value) == "table" then
                    value = readonly(value)
                end
                return nextKey, value
            end
            return iter, tbl, nil
        end,

        __ipairs = function()
            local i = 0
            return function()
                i = i + 1
                local value = tbl[i]
                if value == nil then return end
                if type(value) == "table" then
                    value = readonly(value)
                end
                return i, value
            end
        end,

        __len = function()
            return #tbl
        end,

        __metatable = false,
    })
end

kernel._U=readonly(kernel._G)
kernel.allowGlobalOverwrites=true
kernel._U._G=kernel._U
kernel.allowGlobalOverwrites=false