Fix SIGABORT caused by double exception in PyTorchStreamReader when file not found. (#33243)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33243
If a file does not exist in an archive, PyTorchStreamReader throws an exception. However, when PyTorchStreamReader is destructed another exception is thrown while processing the first exception. As a result of this double exception there is SIGABORT.
Thanks dreiss for catching this bug and suggesting the fix. It happened when he used _load_for_mobile to load a torch script file without bytecode session. A unittest is added to test this case.
Test Plan: Imported from OSS
Differential Revision: D19859205
Pulled By: iseeyuan
fbshipit-source-id: 8f96b6256f1a1f933fce1c256d64604c7e9269e4
