[MacRuby] #1441: `rake spec:ci` fails with MacRuby master

[MacRuby]

#1441: `rake spec:ci` fails with MacRuby master
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 Reporter:  msabramo@…          |       Owner:  lsansonetti@…        
     Type:  defect              |      Status:  new                  
 Priority:  blocker             |   Milestone:                       
Component:  MacRuby             |    Keywords:                       
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Comment(by msabramo@…):

 @watson1978: Hmmm, I also found a gist with this error that looks like
 it's from you. https://gist.github.com/944091

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Ticket URL: <http://www.macruby.org/trac/ticket/1441#comment:9>
MacRuby <http://macruby.org/>