From 29da006f787a30bba1359c4b91a0210921e4e73a Mon Sep 17 00:00:00 2001
From: Sanjeev Suresh <sasuresh@23andme.com>
Date: Thu, 21 Jun 2018 15:26:27 -0700
Subject: [PATCH] changed the getList default to an empty list instead of None,
 because otherwise an exception is raised when trying to iterate over an empty
 list

---
 moto/s3/models.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/moto/s3/models.py b/moto/s3/models.py
index 431c9c988..c38eea5c7 100644
--- a/moto/s3/models.py
+++ b/moto/s3/models.py
@@ -718,7 +718,7 @@ class S3Backend(BaseBackend):
                 if key_name in bucket.keys:
                     key = bucket.keys[key_name]
             else:
-                for key_version in bucket.keys.getlist(key_name):
+                for key_version in bucket.keys.getlist(key_name, default=[]):
                     if str(key_version.version_id) == str(version_id):
                         key = key_version
                         break