Codon cannot find a symbol that is declared in the previous statement

[flixman]

I have a flask application and I want to give it a try building it with Codon. When building the application via codon build -release -exe app.py I get the following error:

Assert failed:	cannot find 'update_fts' [fts.py:84:1]
Expression:	f
Source:		/github/workspace/codon/parser/visitors/simplify/ctx.cpp:100
Aborted

However, in the code there are these statements:

update_fts = DDL('''CREATE TRIGGER work_item_update AFTER INSERT ON work_item
  BEGIN
    INSERT INTO work_item_fts (id, type, state, title, description)
    VALUES (new.id, new.type, new.state, new.title, new.description);
  END;''')
db.event.listen(WorkItem.__table__, 'after_create', CreateFtsTable(WorkItem))
db.event.listen(WorkItem.__table__, 'after_create', update_fts)
db.event.listen(WorkItem.__table__, 'after_create', get_fts_references)

I guess is worth highlighting also that the statement db.event.listen(WorkItem.__table__, 'after_create', update_fts) is in line 75, not 81.

Am I doing something wrong, or this is a bug?