>> require "highline/import"
=> true
>> HighLine.track_eof?
=> true
>> ask("")
^D を入力
EOFError: The input stream is exhausted.
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline.rb:601:in `get_line'
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline.rb:622:in `get_response'
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline.rb:216:in `ask'
from (irb):3
>> HighLine.track_eof = false
=> false
>> HighLine.track_eof?
=> false
>> ask("")
^D を入力
NoMethodError: undefined method `strip' for nil:NilClass
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline/question.rb:395:in `send'
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline/question.rb:395:in `remove_whitespace'
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline.rb:604:in `get_line'
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline.rb:622:in `get_response'
from /usr/local/ruby-1.8.7/lib/ruby/gems/1.8/gems/highline-1.6.1/lib/highline.rb:216:in `ask'
from (irb):6
