Summary: Fixed NPE linked by task. From the code, that stuff should never be null, unless there is some threading / concurrency issue, which there apparently is. In that case, failing with a warning is imho a bit more elegant than raising exceptions from a debugging tool
Reviewed By: lblasa
Differential Revision: D32278044
fbshipit-source-id: 710fcdcfe458f33bbb806d9f2f1b9352252eedec