pytorch

586c2e8d - [ONNX] Fix graph sequence output from loop node (#51305) (#51521)

[ONNX] Fix graph sequence output from loop node (#51305) (#51521) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/51521 * Add loop & if node to the list of nodes that could produce sequence type output. * Switch from `[]` to `at()` to avoid segfault of out of range access. Test Plan: Imported from OSS Reviewed By: pbelevich Differential Revision: D26203112 Pulled By: SplitInfinity fbshipit-source-id: e990eeed933124b195be0be159271e33fb485063