Summary: Ref T7124. The local version of `this` in the handler of 'end' was incremented rather than the global one.
Test Plan: Sending test notifications did not increment the `messages.in` value before this patch even if it should have. With the patch sending test notifications does increment `messages.in`.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7124
Differential Revision: https://secure.phabricator.com/D11648
172566a769