From 7a7f59210d5eb7a38a5fac8889010bd54576ea01 Mon Sep 17 00:00:00 2001
From: Michael Crosby <michael@crosbymichael.com>
Date: Mon, 31 Mar 2014 23:12:08 +0000
Subject: [PATCH] Ensure secound part of the key is provided
 Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com>
 (github: crosbymichael)

---
 runconfig/parse.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/runconfig/parse.go b/runconfig/parse.go
index a330c6c869..da4e045cd0 100644
--- a/runconfig/parse.go
+++ b/runconfig/parse.go
@@ -243,6 +243,8 @@ func parseDriverOpts(opts opts.ListOpts) (map[string][]string, error) {
 		parts := strings.SplitN(o, ".", 2)
 		if len(parts) < 2 {
 			return nil, fmt.Errorf("invalid opt format %s", o)
+		} else if strings.TrimSpace(parts[0]) == "" {
+			return nil, fmt.Errorf("key cannot be empty %s", o)
 		}
 		values, exists := out[parts[0]]
 		if !exists {