From e0ecda961cc95e1dedd0c775e436337959d0bc86 Mon Sep 17 00:00:00 2001
From: John Julien <john@julienfamily.com>
Date: Wed, 9 Mar 2016 19:33:47 -0600
Subject: [PATCH] Fixed linked clone failure when master VM is missing

If the master VM is removed, but the master_id file exists, Vagrant
would still attempt to clone using the master_id rather then
importing re-importing first.

Fixes #6742
---
 plugins/providers/virtualbox/action/import_master.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/providers/virtualbox/action/import_master.rb b/plugins/providers/virtualbox/action/import_master.rb
index ae8f52f32..c1bda5b01 100644
--- a/plugins/providers/virtualbox/action/import_master.rb
+++ b/plugins/providers/virtualbox/action/import_master.rb
@@ -51,6 +51,8 @@ module VagrantPlugins
               "Master VM for '#{env[:machine].box.name}' already exists " +
               " (id=#{env[:clone_id]}) - skipping import step.")
             return
+          else
+            env.delete(:clone_id)
           end
 
           env[:ui].info(I18n.t("vagrant.actions.vm.clone.setup_master"))