Right way to emty stdin?

[Gilles Ganault <gilles.ganault@...>]

Hello

	I'm having a problem reading whatever data a server is sending to
the script through stdin.

This code is based on what I read in the www.lua.org/pil/21.1.html
page:
=======
#!/usr/bin/lua

--Must first empty stdin
while true do
        local line = io.read()
        -- if line == "" then break end
        if line == nil then break end
end

io.write("NOOP After loop\n")
line = io.read()
=======

For some reason, the script seems stuck in the while loop, since it
never displays the NOOP line.

"luac -p myscript.lua" doesn't return an error.

Any idea what could be wrong with the code?

Thank you.