From 5559e49df3a5abe9fefbe9055be1dee1809ca0f9 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Wed, 21 Aug 2013 11:00:07 -0700
Subject: [PATCH] packer/plugin: remove race in Exited()

---
 packer/plugin/client.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packer/plugin/client.go b/packer/plugin/client.go
index 4b9f0bbf8..d3a302977 100644
--- a/packer/plugin/client.go
+++ b/packer/plugin/client.go
@@ -122,6 +122,8 @@ func NewClient(config *ClientConfig) (c *Client) {
 
 // Tells whether or not the underlying process has exited.
 func (c *Client) Exited() bool {
+	c.l.Lock()
+	defer c.l.Unlock()
 	return c.exited
 }