/var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:74: warning: default `to_a' will be obsolete
/var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/util.rb:23:in `document': undefined method `attributes' for nil:NilClass (NoMethodError)
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/guest.rb:111:in `fetch_info'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/guest.rb:98:in `fetch_guest'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/guest.rb:12:in `initialize'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:75:in `new'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:75:in `find_guest_by_id'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:74:in `map'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:74:in `find_guest_by_id'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:20:in `running_guests'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:19:in `map'
	from /var/lib/gems/1.8/gems/virt-0.1.0/lib/virt/host.rb:19:in `running_guests'