-- Ignore nested lookups
local ignoreLookups = { 
    __index = function() return ignoreLookups end,
    __tostring = function(t) return "ERROR" end
}
setmetatable(ignoreLookups, ignoreLookups)
 
local function nn(val) return  (val==nil)?"NIL":val) end
local function catchBadReference(t, key)
    d("Caught an unexpected access: key " .. nn(key) .. " under " .. nn(rawget(t.__underKey)))
    return ignoreLookups
end
local metaCatchBadReference = { __index = catchBadReference }

function applyCatch(table) {
    --Prevent loops on cyclical table references
    if val.__underKey then return end
 
    val.__underKey = "/"
    for key,val in table do
        if type(val) == "table" then
            applyCatch(val)
            val.__underKey = key
        end
    end
    setmetatable(table, metaCatchBadReference);
}
 
applyCatch(JunkIt.AccountSavedVariables.GLOBALUNKNOWNS)