[MacRuby] #1111: MacRuby throws an exception when undefine the String#length.

[MacRuby]

#1111: MacRuby throws an exception when undefine the String#length.
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 Reporter:  watson1978@…          |       Owner:  lsansonetti@…        
     Type:  defect                |      Status:  new                  
 Priority:  major                 |   Milestone:                       
Component:  MacRuby               |    Keywords:                       
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Comment(by lsansonetti@…):

 That is expected: we cannot allow the user to change native methods such
 as NSString -length because it can cause unexpected crashes later in the
 process.

 However, as String is RubyString (a subclass), maybe this exception
 shouldn't be raised here.

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Ticket URL: <http://www.macruby.org/trac/ticket/1111#comment:1>
MacRuby <http://macruby.org/>