pytorch

f769cf99 - fix buildindexop (#16341)

fix buildindexop (#16341) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/16341 as in the title Reviewed By: intermilan Differential Revision: D13808679 fbshipit-source-id: 0d12d3253f380bec66bc9be899be565861b8163a