NFS no longer attempts to clean exports file if VM is not created, which caused a stack trace during recovery.

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## 0.6.4 (unreleased)
 
+  - NFS no longer attempts to clean exports file if VM is not created,
+    which was causing a stack trace during recovery. [related to GH-166]
   - Basic validation added for Chef configuration (both solo and server).
   - Top config class is now available in all `Vagrant::Config::Base`
     subclasses, which is useful for config validation.

lib/vagrant/action/vm/nfs.rb

@@ -42,7 +42,7 @@ module Vagrant
         end
 
         def recover(env)
-          clear_nfs_exports(env)
+          clear_nfs_exports(env) if env["vm"].created?
         end
 
         # Returns the folders which are to be synced via NFS.

test/vagrant/action/vm/nfs_test.rb

@@ -68,10 +68,20 @@ class NFSVMActionTest < Test::Unit::TestCase
     end
 
     context "recovery" do
+      setup do
+        @vm.stubs(:created?).returns(true)
+      end
+
       should "clear NFS exports" do
         @instance.expects(:clear_nfs_exports).with(@env).once
         @instance.recover(@env)
       end
+
+      should "do nothing if VM is not created" do
+        @vm.stubs(:created?).returns(false)
+        @instance.expects(:clear_nfs_exports).never
+        @instance.recover(@env)
+      end
     end
 
     context "extracting folders" do