Summary:
we filter the $actors above such that its possible to have no $actor anymore (if $actor is not a deliverable email address). ergo, make sure we have actor before we start calling methods.
Fixes github issue 403
Test Plan: logic on this one - not 100% sure how to easily reproduce
Reviewers: epriestley
Reviewed By: epriestley
CC: Korvin, epriestley, aran
Differential Revision: https://secure.phabricator.com/D7284
db71bf6128