Steps to reproduce

1.  Configure a delivery endpoint using the attached example of a custom reference resolver.
2.  Request content using the new endpoint.

Expected results

1. In releases pre 2.2.2, the reference resolver works and returns a JSON serialised object.

Actual results

1. Magnolia produces a 500 error without logging anything. In incomplete JSON response is delivered with no key for the resolved property but a serialised object.
   ie.
   {"results":[{"@name":"Testing","@path":"/Testing","@id":"bdbaf549-e1aa-4bd2-8fb9-80be4d9dc270","@nodeType":"mgnl:event", {"name":"A Dummy Object"}

Workaround

1. None yet.

Development notes