Github user mattyb149 commented on the issue:
https://github.com/apache/nifi/pull/2672
I think the invalid scopes thing should be done in a separate Jira, there
are more than just the ones above (~40 in total) so I think we should tackle
them all at once, and have this PR just call evaluateAttributeExpressions with
the empty map. I don't think that's a hack, it emulates the real behavior
(although the real one has a ValueLookup whose constructor skips flow file
processing if null).---
