From: Pedro Medeiros <pedrosnk@...>
Date: 2011-09-07T02:30:50+09:00
Subject: [ruby-core:39306] [Ruby 1.9 - Bug #5285] Ruby 1.9.2 throws exception on sort of array containing true AND false values


Issue #5285 has been updated by Pedro Medeiros.


actually, by doing true <=> false on irb returns nil, while doing true <=> true or false <=> false will return 0. not necessarily an exception. Wouldn't it be right to return -1 or 1 by comparing true with false or false with true, even though true came from TrueClass and false came from FalseClass ?
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Bug #5285: Ruby 1.9.2 throws exception on sort of array containing true AND false values
http://redmine.ruby-lang.org/issues/5285

Author: Martin Corino
Status: Rejected
Priority: Normal
Assignee: 
Category: core
Target version: 1.9.2
ruby -v: ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]


I encountered a very weird bug.

Sorting of arrays containing identical boolean values (ALL true or ALL false) works fine.
As soon as 1 value differs however #sort throws an exception.


ruby-1.9.2-p290 :001 > [true, true].sort
 => [true, true] 

ruby-1.9.2-p290 :002 > [false, false].sort
 => [false, false] 

ruby-1.9.2-p290 :003 > [false, true].sort
ArgumentError: comparison of FalseClass with true failed
        from (irb):3:in `sort'
        from (irb):3
        from /home/martin/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'

ruby-1.9.2-p290 :004 > [false, true, false].sort
ArgumentError: comparison of FalseClass with true failed
        from (irb):4:in `sort'
        from (irb):4
        from /home/martin/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'

ruby-1.9.2-p290 :011 > [true, true, true, true].sort
 => [true, true, true, true] 

ruby-1.9.2-p290 :012 > [true, true, true, false].sort
ArgumentError: comparison of TrueClass with false failed
        from (irb):12:in `sort'
        from (irb):12
        from /home/martin/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'



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