From: Koichi Sasada <redmine@...>
Date: 2011-06-11T17:11:00+09:00
Subject: [ruby-core:37020] [Ruby 1.9 - Bug #4517] ArgumentError when sorting array of objects


Issue #4517 has been updated by Koichi Sasada.


Could you show the reproducible code?
----------------------------------------
Bug #4517: ArgumentError when sorting array of objects
http://redmine.ruby-lang.org/issues/4517

Author: Milo Thurston
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: 1.9.2p180


=begin
I've got some Rails (v. 3.0.4) code wherein an array of objects (referred to as 'Thing' here) need to be sorted:

stuff = array of Things
stuff.sort! {|a,b| a.value <=> b.value }

���where value is a String. 
On Ruby 1.9.2p136 the array "stuff" is sorted successfully, but running the same code on 1.9.2p180 I get the following error:

ArgumentError (comparison of Thing with Thing failed)

I can reproduce the error in the console as well as when running the Rails application.
Thanks for taking a look. 
=end



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