Handle the case properly where the VM in `.vagrant` doesn't exist anymore

lib/vagrant/driver/virtualbox.rb

@@ -5,9 +5,16 @@ module Vagrant
   module Driver
     # This class contains the logic to drive VirtualBox.
     class VirtualBox
+      # This is raised if the VM is not found when initializing a driver
+      # with a UUID.
+      class VMNotFound < StandardError; end
+
       # Include this so we can use `Subprocess` more easily.
       include Vagrant::Util
 
+      # The UUID of the virtual machine we represent
+      attr_reader :uuid
+
       # The version of virtualbox that is running.
       attr_reader :version
 
@@ -15,6 +22,13 @@ module Vagrant
         @logger = Log4r::Logger.new("vagrant::driver::virtualbox")
         @uuid = uuid
 
+        if @uuid
+          # Verify the VM exists, and if it doesn't, then don't worry
+          # about it (mark the UUID as nil)
+          r = raw("showvminfo", @uuid)
+          raise VMNotFound if r.exit_code != 0
+        end
+
         # Read and assign the version of VirtualBox we know which
         # specific driver to instantiate.
         begin

lib/vagrant/vm.rb

@@ -114,7 +114,14 @@ module Vagrant
     end
 
     def reload!
-      @driver = Driver::VirtualBox.new(@uuid)
+      begin
+        @driver = Driver::VirtualBox.new(@uuid)
+      rescue Driver::VirtualBox::VMNotFound
+        # Clear the UUID since this VM doesn't exist. Note that this calls
+        # back into `reload!` but shouldn't ever result in infinite
+        # recursion since `@uuid` will be nil.
+        self.uuid = nil
+      end
     end
 
     def package(options=nil)