Passing arguments to a chunk?

[Marc Balmer <marc@...>]

Using loadfile() I can load a Lua chunk and assign it to a function:

env = {}
script = loadfile('test.lua', 'r', env)

Then using pcall() I can execute it:

pcall(script)

So far so good, but is there a way to pass an argument to a chunk?  Using pcall, I can pass arguments like this

args = {}
args.data = 'Hello, world'

pcall(script, args)

But how can I access "args" from within the Lua chunk "test.lua"?