From: Caleb Clausen <vikkous@...>
Date: 2010-01-24T05:07:34+09:00
Subject: [ruby-core:27739] Re: able to re-require $0

On 1/23/10, Robert Klemme <shortcutter@googlemail.com> wrote:
> Yes, that's the easy fix.  But the easy fix is not robust (i.e. you
> can still require it via a symlinked file)

But Kernel#require has the same issue.

> and rarely necessary since
> nobody really would "require $0".

Not like that, no. But I can easily see a scenario where foo.rb
requires bar.rb which turns around and requires foo.rb again. That's a
circular require, and ought to be detected as such even if foo.rb is
the main script.