From: Dave Thomas Date: 2008-12-04T13:08:58+09:00 Subject: [ruby-core:20289] Re: autoload and concurrency On Dec 3, 2008, at 9:55 PM, James Gray wrote: > Thread.new do > require "i_so_hope_im_wrong_about_this" > end That's a new thread, so the mutex.lock in its require will hang until any outer level one is done