R1:b21270d498d3

Probably fix bad loadArtifactLease() call

Summary: Ref T9205. This is a likely fix.

Test Plan: This isn't straightforward to test in the upstream unless you have custom code on top of it.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9205

Differential Revision: https://secure.phabricator.com/D13928