exceptional_ruby_listing_3_errata.rb

module RaiseExit 
  def raise(msg_or_exc, msg=msg_or_exc, trace=caller)
    warn msg.to_s
    exit!
  end
end

class Object
  include RaiseExit
end

begin
  raise "TooLazyToWork"
rescue
  puts "executing rescue"
ensure
  puts "executing ensure"
end

Considering the ruby method lookup

instead of including RaiseExit in the Kernel module...

module Kernel 
  include RaiseExit
end

it should be included in the Object class.

class Object
  include RaiseExit
end