From ...
From: Erik Naggum <erik@naggum.net>
Subject: Re: detecting circular lists
Date: 2000/08/20
Message-ID: <3175783095888690@naggum.net>#1/1
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* nicknews@ptcstudios.com
| Is there a Common Lisp function that detects whether or not a list
| is circular?

  The function list-length returns the length of a proper list, or nil
  when applied to a circular list.

#:Erik
-- 
  If this is not what you expected, please alter your expectations.