pytorch

8bf8b64b - [easy][PTE] Ensure the stream points to the beginning before calling getFileFormat (#75437)

[easy][PTE] Ensure the stream points to the beginning before calling getFileFormat (#75437) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/75437 To avoid potential FileFormatError when geting the format of the input stream, move the pointer to the beg of the stream to read the magic bytes ghstack-source-id: 153308166 Test Plan: Ci Reviewed By: iseeyuan Differential Revision: D35469481 fbshipit-source-id: 489fae30a0fdea5bd7baea486bb0733a88816778 (cherry picked from commit ac87007dd300c7392a2df6dc73a4c2dd003c432b)