pytorch

3a6d473b - collect_env fix (#15447)

collect_env fix (#15447) Summary: fixes #15214 Pull Request resolved: https://github.com/pytorch/pytorch/pull/15447 Differential Revision: D13531523 Pulled By: ezyang fbshipit-source-id: 8f24f5ae9f3e78f6c5c9ee702ba14faca7aa297a