"self.name" needn't be defined for target_vms helper to be used

lib/vagrant/command/helpers.rb

@@ -12,7 +12,7 @@ module Vagrant
       # This returns an array of {VM} objects depending on the arguments
       # given to the command.
       def target_vms(name=nil)
-        name ||= self.name
+        name ||= self.name rescue nil
 
         @target_vms ||= begin
           if env.multivm?