Lua 5.2 new function reference inside a loop

[Paul Bernier <bernier.pja@...>]

Hello all,

I just noticed an unexpected (to me) behavior of Lua 5.2 and I'd like some enlightenment on it:
for i=0,2 do
    local a = function() end;
    print(a);
end

This code will produce on Lua5.2 something like :

function: 0x20fcc70
function: 0x20fcc70
function: 0x20fcc70

Whereas with Lua5.1 or LuaJIT it'd produce:

function: 0x41e71058
function: 0x41e71078
function: 0x41e71158

My questions are:
-why Lua5.2 has this behavior?
-is there any workaround (other than modifying the VM) to get the second behavior?

Thanks!