tempfile-wrong-way.rb

require 'tempfile'

def tempwrite
  f = Tempfile.new('temp')
  f.puts 'nihanihanihanihatorigairu'
  f.close
  return f.path
end

path = tempwrite
GC.start
File.open(path) do |f|
  puts f.gets
end
#=> Errno::ENOENT: No such file or directory - /tmp/tempYYYYMMDD-xxxxx-xxxxxxx-0