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-rw-r--r--cloudinit/sources/__init__.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/cloudinit/sources/__init__.py b/cloudinit/sources/__init__.py
index a1939d58..a3f4af1e 100644
--- a/cloudinit/sources/__init__.py
+++ b/cloudinit/sources/__init__.py
@@ -72,6 +72,8 @@ class DataSource(object):
return None
def _filter_userdata(self, processed_ud):
+ if not processed_ud:
+ return processed_ud
idx = self.get_launch_index()
if idx is None:
return processed_ud