Make sure old singleton doesn't get reported as leak if make_mock is used
Make sure old singleton doesn't get reported as leak if make_mock is used

Differential Revision: D9499697

fbshipit-source-id: b04e9e0d1bf4abf1b5ff497cefbc26da0176eaa2

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly