From 84371ffb225cf87e5d5eb5ae0b95d7f12a17e789 Mon Sep 17 00:00:00 2001
From: Konstantin Lopuhin <kostia.lopuhin@gmail.com>
Date: Fri, 25 Mar 2016 18:35:55 +0300
Subject: [PATCH] Fix handling of meta=None in S3FilesStore.persist_file

---
 scrapy/pipelines/files.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scrapy/pipelines/files.py b/scrapy/pipelines/files.py
index 1fd2571e2..c5dbd307b 100644
--- a/scrapy/pipelines/files.py
+++ b/scrapy/pipelines/files.py
@@ -147,7 +147,7 @@ class S3FilesStore(object):
                 Bucket=self.bucket,
                 Key=key_name,
                 Body=buf,
-                Metadata={k: str(v) for k, v in six.iteritems(meta)},
+                Metadata={k: str(v) for k, v in six.iteritems(meta or {})},
                 ACL=self.POLICY,
                 **extra)
         else: