From ec55890c55a74bff65d4ebede611c0ed4bb1c4a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gina=20H=C3=A4u=C3=9Fge?= <gina@octoprint.org>
Date: Fri, 28 Jul 2017 12:01:36 +0200
Subject: [PATCH] Check that .metadata.yaml actually contains a dict

It might just be empty (= None) or a list or something.

Thanks @Kunsi for the heads-up.
---
 src/octoprint/filemanager/storage.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/octoprint/filemanager/storage.py b/src/octoprint/filemanager/storage.py
index 0f49ec88..582abaea 100644
--- a/src/octoprint/filemanager/storage.py
+++ b/src/octoprint/filemanager/storage.py
@@ -1353,8 +1353,9 @@ class LocalFileStorage(StorageInterface):
 					except:
 						self._logger.exception("Error while reading .metadata.yaml from {path}".format(**locals()))
 					else:
-						self._metadata_cache[path] = deepcopy(metadata)
-						return metadata
+						if isinstance(metadata, dict):
+							self._metadata_cache[path] = deepcopy(metadata)
+							return metadata
 			return dict()
 
 	def _save_metadata(self, path, metadata):