From e91e665cc888f0618997dc4178321f2142aa004b Mon Sep 17 00:00:00 2001
From: Aaron Feng <aaron@forty9ten.com>
Date: Tue, 17 Jun 2014 12:50:09 -0400
Subject: [PATCH] check reservation before accessing instance

Docker-DCO-1.1-Signed-off-by: Aaron Feng aaron.feng@gmail.com (github: aaronfeng)
---
 backends/ec2.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/backends/ec2.go b/backends/ec2.go
index e0acf57b97..3c4adde3df 100644
--- a/backends/ec2.go
+++ b/backends/ec2.go
@@ -172,6 +172,9 @@ func (c *ec2Client) findInstance() (instance *ec2.Instance, err error) {
   if resp, err := c.ec2Conn.Instances([]string{}, filter); err != nil {
     return nil, err
   } else {
+    if resp.Reservations == nil {
+      return nil, nil
+    }
     return &resp.Reservations[0].Instances[0], nil
   }
 }