From 666461277dcfeb063e89dfb18ecde4ad98627bef Mon Sep 17 00:00:00 2001
From: Julien Duponchelle <julien@gns3.net>
Date: Tue, 10 Jan 2017 10:09:34 +0100
Subject: [PATCH] Fix a crash with some docker images

Fix #861
---
 gns3server/compute/docker/__init__.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/gns3server/compute/docker/__init__.py b/gns3server/compute/docker/__init__.py
index 4521da13..1ff3430d 100644
--- a/gns3server/compute/docker/__init__.py
+++ b/gns3server/compute/docker/__init__.py
@@ -157,7 +157,8 @@ class Docker(BaseManager):
         """
         images = []
         for image in (yield from self.query("GET", "images/json", params={"all": 0})):
-            for tag in image['RepoTags']:
-                if tag != "<none>:<none>":
-                    images.append({'image': tag})
+            if image['RepoTags']:
+                for tag in image['RepoTags']:
+                    if tag != "<none>:<none>":
+                        images.append({'image': tag})
         return sorted(images, key=lambda i: i['image'])