yup.txt

C:\Users\Neffi
λ lua
Lua 5.2.3  Copyright (C) 1994-2013 Lua.org, PUC-Rio
> local t={}; for i = 1,950000 do t[i]='a' end; local tprime = table.pack(table.unpack(t,1,#t/2)); print(#tprime)
475000
> local t={}; for i = 1,1000000 do t[i]='a' end; local tprime = table.pack(table.unpack(t,1,#t/2)); print(#tprime)
500000
> local t={}; for i = 1,1200000 do t[i]='a' end; local tprime = table.pack(table.unpack(t,1,#t/2)); print(#tprime)
600000
> local t={}; for i = 1,2200000 do t[i]='a' end; local tprime = table.pack(table.unpack(t,1,#t/2)); print(#tprime)
stdin:1: too many results to unpack
stack traceback:
        [C]: in function 'unpack'
        stdin:1: in main chunk
        [C]: in ?
>