SVN log messages can be None.

attract_server/subversion.py

@@ -40,6 +40,10 @@ class CommitLogObserver(object):
             # assumption: revisions are always logged in strictly increasing order.
             self.last_seen_revision = log_entry.revision
 
+            # Log entries can be None.
+            if not log_entry.msg:
+                continue
+
             # Parse the commit log to see if there are any task markers.
             lines = log_entry.msg.split('\n', 1)
             first_line = lines[0]

tests/test_subversion.py

@@ -27,7 +27,7 @@ SVN_LOG_BATCH_1 = [
     LogEntry(date=datetime.datetime(2016, 4, 8, 13, 5, 39, 42537, tzinfo=tzutc()),
              msg='Initial commit of layout files', revision=44, author='hjalti', changelist=None),
     LogEntry(date=datetime.datetime(2016, 4, 8, 13, 6, 18, 947830, tzinfo=tzutc()),
-             msg='Second commit of layout files', revision=45, author='hjalti', changelist=None),
+             msg=None, revision=45, author='andy', changelist=None),
     LogEntry(date=datetime.datetime(2016, 4, 8, 14, 22, 24, 411916, tzinfo=tzutc()),
              msg="Add the eye lattices to the main group\n\nOtherwise when you link the agent group, those two lattices would be\nlinked as regular objects, and you'd need to move both proxy+lattices\nindividually.\n\n\n",
              revision=46, author='pablo', changelist=None),