Treat Union[T, NoneType] as Optional[T]

[nikithamalgifb]

Stack from ghstack:

• Treat Union[T, NoneType] as Optional[T] #51605 Treat Union[T, NoneType] as Optional[T]

[facebook-github-bot]

💊 CI failures summary and remediations

As of commit 1380edb (more details on the Dr. CI page):

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• 2/6 failures possibly* introduced in this PR
  • 1/2 non-CircleCI failure(s)
• 4/6 broken upstream at merge base b283ac6 on Feb 02 from 3:39pm to 7:49pm

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1 failure not recognized by patterns:

Job	Step	Action
pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_test2	Run tests	🔁 rerun

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🚧 4 fixed upstream failures:

These were probably caused by upstream breakages that were already fixed.

Please rebase on the viable/strict branch (expand for instructions)

If your commit is older than viable/strict, run these commands:

git fetch https://github.com/pytorch/pytorch viable/strict
git rebase FETCH_HEAD

Check out the recency history of this "viable master" tracking branch.

• pytorch_linux_bionic_py3_8_gcc9_coverage_test2 on Feb 02 from 4:20pm to 7:48pm (b283ac6 - 209e27e)
  • 🔁 rerun
• pytorch_linux_bionic_py3_6_clang9_test on Feb 02 from 3:39pm to 6:15pm (e488e3c - 209e27e)
  • 🔁 rerun
• pytorch_macos_10_13_py3_test on Feb 02 from 4:20pm to 7:49pm (b283ac6 - 26f9ac9)
  • 🔁 rerun
• pytorch_windows_vs2019_py36_cuda10.1_test2 on Feb 02 from 4:13pm to 5:52pm (c791a30 - 5499e83)
  • 🔁 rerun

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ci.pytorch.org: 1 failed

• Failed: pr/pytorch-linux-bionic-rocm3.10-py3.6

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[facebook-github-bot]

@nikithamalgifb merged this pull request in ecf8166.