=== modified file 'clickreviews/cr_url_dispatcher.py'
--- clickreviews/cr_url_dispatcher.py	2015-11-13 23:21:27 +0000
+++ clickreviews/cr_url_dispatcher.py	2015-12-04 10:47:57 +0000
@@ -57,6 +57,8 @@
     def _extract_url_dispatcher(self, app):
         '''Get url dispatcher json'''
         u = self.manifest['hooks'][app]['urls']
+        if not u:
+            error("'urls' definition is empty")
         fn = os.path.join(self.unpack_dir, u)
 
         bn = os.path.basename(fn)