What has happened to arg?

[Dirk Laurie <dirk.laurie@...>]

It is 05:00 in my timezone. My head probably is not working.

I can't figure out this:

…/latest$ src/lua
Lua 5.2.2  Copyright (C) 1994-2013 Lua.org, PUC-Rio
> print(arg)
nil

It is the very latest Lua 5.2.2, just downloaded from lua.org.

Surely `arg` should be a table, in which arg[0]="lua" etc.?