pytorch

75db05c3 - Check if the iterator is valid before dereferencing it (#72405)

Check if the iterator is valid before dereferencing it (#72405) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/72405 Fixes #71674. This shouldn't segfault now: ``` import torch d = torch.complex64 torch.set_default_dtype(d) ``` Test Plan: Imported from OSS Reviewed By: jbschlosser Differential Revision: D34423660 Pulled By: anjali411 fbshipit-source-id: cac92a6f56846f2c0727a120b5f568aa75baa21e (cherry picked from commit eaab813a0fddced24303b3bd50e4fcdba1516e46)