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Summary: Pull Request resolved: https://github.com/facebook/folly/pull/1142

Reviewed By: shixiao

Differential Revision: D15574540

Pulled By: yfeldblum

fbshipit-source-id: 2ce91f7510f0b278677c15b3a9f1f80b43ff8998

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