pytorch

97b20b9b - [SR][easy] Stack/concat out variants do not segfault on empty inputs (#73704)

[SR][easy] Stack/concat out variants do not segfault on empty inputs (#73704) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/73704 Empty inputs are invalid for these ops. But while looking for optimizations, I noticed that these ops just segfault when that happens, which is not helpful for users. Added a check/error message. ghstack-source-id: 150812721 Test Plan: New unit tests Reviewed By: hlu1 Differential Revision: D34596954 fbshipit-source-id: 6b22a3a255273920210dcd41f54a9d238bbbcc14 (cherry picked from commit 9e950bfffef36c320638662bdb72f19eb805a228)