pytorch

61dfcbf4 - Back out "Revert D30745921: [DDP] Fix when buffers are reassigned in module" (#64776)

Back out "Revert D30745921: [DDP] Fix when buffers are reassigned in module" (#64776) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64776 Original commit changeset: 343ead86bf1e ghstack-source-id: 138326914 Test Plan: ci Reviewed By: H-Huang Differential Revision: D30849444 fbshipit-source-id: 9a72805416fe7d6c68e51bdcdb88f6e1fecb614d