[BUG] Segmentation fault in Ruby

HI I’m geting error in ruby

This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application’s support team for more information.
c:/ruby/lib/ruby/1.8/test/unit.rb:278: [BUG] Segmentation fault
ruby 1.8.6 (2007-03-13) [i386-mswin32]