Fix no auto batching bugs: cannot bulk load; not work with namedtuple (#26065)
Summary:
see title
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26065
Differential Revision: D17392851
Pulled By: soumith
fbshipit-source-id: 468cd41c8e03d689ff2e0261d948e28daad6bfaf
