From 498c9aa9f1f944e885a3a26c83746e2e41326ca8 Mon Sep 17 00:00:00 2001
From: Peter Amstutz <peter.amstutz@curoverse.com>
Date: Fri, 27 Jun 2014 10:57:24 -0400
Subject: [PATCH] Handle zero-length streams that contain zero-length files. 
 refs #3084

---
 sdk/python/arvados/collection.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sdk/python/arvados/collection.py b/sdk/python/arvados/collection.py
index 87923489f8..a1195bf0a6 100644
--- a/sdk/python/arvados/collection.py
+++ b/sdk/python/arvados/collection.py
@@ -41,6 +41,9 @@ def normalize_stream(s, stream):
                 blocks[b[arvados.LOCATOR]] = streamoffset
                 streamoffset += b[arvados.BLOCKSIZE]
 
+    if len(stream_tokens) == 1:
+        stream_tokens.append(config.EMPTY_BLOCK_LOCATOR)
+
     for f in sortedfiles:
         current_span = None
         fout = f.replace(' ', '\\040')
-- 
2.30.2