foo

irb(main):009:0> 10.times { 
 begin
   Resolv.getaddress("rewrq.rqweqwrw.rqww")
 rescue Resolv::ResolvError
   p $!
 end
}
#<Resolv::ResolvError: no address for rewrq.rqweqwrw.rqww>
#<Resolv::ResolvError: no address for rewrq.rqweqwrw.rqww>
#<Resolv::ResolvError: no address for rewrq.rqweqwrw.rqww>
#<Resolv::ResolvError: no address for rewrq.rqweqwrw.rqww>
#<Resolv::ResolvError: no address for rewrq.rqweqwrw.rqww>
#<Resolv::ResolvError: no address for rewrq.rqweqwrw.rqww>
#<Resolv::ResolvError: no address for rewrq.rqweqwrw.rqww>
ArgumentError: wrong number of arguments (0 for 1)
	from /usr/local/lib/ruby/1.8/resolv.rb:600:in `initialize'
	from /usr/local/lib/ruby/1.8/resolv.rb:600:in `exception'
	from /usr/local/lib/ruby/1.8/resolv.rb:600:in `raise'
	from /usr/local/lib/ruby/1.8/resolv.rb:600:in `request'
	from /usr/local/lib/ruby/1.8/resolv.rb:474:in `each_resource'
	from /usr/local/lib/ruby/1.8/resolv.rb:919:in `resolv'
	from /usr/local/lib/ruby/1.8/resolv.rb:917:in `each'
	from /usr/local/lib/ruby/1.8/resolv.rb:917:in `resolv'
	from /usr/local/lib/ruby/1.8/resolv.rb:916:in `each'
	from /usr/local/lib/ruby/1.8/resolv.rb:916:in `resolv'
	from /usr/local/lib/ruby/1.8/resolv.rb:914:in `each'
	from /usr/local/lib/ruby/1.8/resolv.rb:914:in `resolv'
	from /usr/local/lib/ruby/1.8/resolv.rb:466:in `each_resource'
	from /usr/local/lib/ruby/1.8/resolv.rb:422:in `each_address'
	from /usr/local/lib/ruby/1.8/resolv.rb:249:in `each_address'
	from /usr/local/lib/ruby/1.8/resolv.rb:248:in `each'
	from /usr/local/lib/ruby/1.8/resolv.rb:248:in `each_address'
	from /usr/local/lib/ruby/1.8/resolv.rb:232:in `getaddress'
	from /usr/local/lib/ruby/1.8/resolv.rb:204:in `getaddress'
	from (irb):32
	from (irb):30:in `times'
	from (irb):30
	from /usr/local/lib/ruby/1.8/resolv.rb:1383irb(main):037:0>