Why does this cause a C stack overflow?

Question

I know I can fix this problem using rawset

, but I'm just wondering why the following code is causing a C stack overflow.

local mt = {
    __newindex = function(self, key, value) 
        self[key] = value 
    end
}

local x = setmetatable({}, mt)

x.y = 5

+3

David 25 oct. '14 at 6:19

1 answer

Yu hao · Accepted Answer · 2014-10-25T06:59:33+0000

Inside a call to a metamethod __newindex

, self[key] = value

it calls the metamethod again __newindex

, recursively, before.