worst possible ruby

worst_possible.rb

p = Proc.new do 
  (0..32).
    to_a.
    map do |_| 
      (
        ('a'..'z').to_a +  
        %w{ ' " ; :  \{ \} , . - _ = + ( ) * & ^ % $ # @ ! } + 
        [' ']
      ).shuffle.first
    end
end 

until(
  until( z = p.call.join;  `ruby -c -e #{z}`=="Syntax OK"); end
  begin
    eval(z) 
  rescue 
    false 
  end
)
end