From: Hans Mackowiak Date: 2013-03-17T17:47:47+09:00 Subject: Re: ObjectSpace._id2ref is giving different type output on Ruby 1.9.3p392 and Ruby 2.0.0p0 ? already fixed in ruby-trunk and before you ask, yeah the object_id of nil is changed in ruby-trunk too -- Posted via http://www.ruby-forum.com/.