From f20c08f57f94c138403a265e3c03c3748e854f2f Mon Sep 17 00:00:00 2001
From: Seth Vargo <sethvargo@gmail.com>
Date: Tue, 24 Nov 2015 15:48:17 -0500
Subject: [PATCH] Return nil if the VM is not running when looking at forwarded
 ports

---
 plugins/providers/virtualbox/cap.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/providers/virtualbox/cap.rb b/plugins/providers/virtualbox/cap.rb
index 77f8ee1ad..1c0512407 100644
--- a/plugins/providers/virtualbox/cap.rb
+++ b/plugins/providers/virtualbox/cap.rb
@@ -9,6 +9,8 @@ module VagrantPlugins
       #
       # @return [Hash<Integer, Integer>] Host => Guest port mappings.
       def self.forwarded_ports(machine)
+        return nil if machine.state.id != :running
+
         {}.tap do |result|
           machine.provider.driver.read_forwarded_ports.each do |_, _, h, g|
             result[h] = g