[MacRuby-devel] [MacRuby] #752: description -> to_s infinite loop

18 Jun 2010

      #752: description -> to_s infinite loop
--------------------------------------+-------------------------------------
 Reporter:  ryand-ruby@…              |       Owner:  lsansonetti@…        
     Type:  defect                    |      Status:  new                  
 Priority:  blocker                   |   Milestone:                       
Component:  MacRuby                   |    Keywords:                       
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 I had a failing unit test that was causing an infinite stack trace. The
 code in question was:

 {{{
 class SimpleNodeData
   attr_accessor :name, :path, :image, :expandable, :selectable, :container

   def initialize name = "Untitled", path = nil
     self.name       = name
     self.path       = path
     self.expandable = true
     self.selectable = true
     self.container  = true
   end

   def compare other
     if SimpleNodeData === other
       return name.compare other.name
     end
     return NSOrderedAscending
   end

   alias :<=> :compare

   def description
     "%@ - '%@' expandable: %@, selectable: %@, container: %@" %
       [super, name, expandable, selectable, container]
   end

   alias :to_s :description
 end
 }}}

 That last alias is the real problem... comment it out and everything works
 fine.

 I believe the failing test line was:

 {{{
       assert child.representedObject.path,
 child.representedObject.description
 }}}

 and the representedObject was a SimpleNodeData instance.

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/752>
MacRuby <http://macruby.org/>