Summary:The logic when saving a bundle was flawed: we didn?t wait for promises returned by the `save` operation.
That would silence all errors from `save`.
Reviewed By: andreicoman11
Differential Revision: D3150363
fb-gh-sync-id: cdabf6f0e171aece5bd1fcb59654fa7c147988ba
fbshipit-source-id: cdabf6f0e171aece5bd1fcb59654fa7c147988ba