Ignore "guest not ready" error when graceful halting [GH-1679]

CHANGELOG.md

@@ -17,6 +17,11 @@ IMPROVEMENTS:
   - More precise detection of Ubuntu/Debian guests so that running Vagrant
     within an LXC container works properly now.
 
+BUG FIXES:
+
+  - Ignore "guest not ready" errors when attempting to graceful halt and
+    carry on checks whether the halt succeeded. [GH-1679]
+
 ## 1.2.2 (April 23, 2013)
 
 FEATURES:

lib/vagrant/action/builtin/graceful_halt.rb

@@ -44,7 +44,12 @@ module Vagrant
           # checked above.
           if graceful
             env[:ui].info I18n.t("vagrant.actions.vm.halt.graceful")
-            env[:machine].guest.capability(:halt)
+
+            begin
+              env[:machine].guest.capability(:halt)
+            rescue Errors::MachineGuestNotReady
+              @logger.info("Machine guest not ready while attempting to halt. Ignoring.")
+            end
 
             @logger.debug("Waiting for target graceful halt state: #{@target_state}")
             count = 0