From: Benoit Daloze <eregontp@...>
Date: 2010-01-22T20:11:07+09:00
Subject: [ruby-core:27691] Re: able to re-require $0

Hi,
> In similar, you can require the same library twice.
>
> �require "foo"
> �require "foo"
>
Excuse me, but at least in 1.9,
p require './test' #=> true
p require './test' #=> false
(the same happen with a stdlib, like benchmark of course)

It's not loaded the second time. And it's very harmful to load 2 times
the same file, because it will redefine every method and constant...

In fact, $" list all the files loaded, so I suspect require looks if
it's not already there. And the current file is not (except if you
require it of course).

But this is not really a bug, u'll probably never require something
with the same name than your script.