This issue looks similar to the one reported on AIX with RNN sample script for caffe2 - Issue with caffe2 port on to AIX 1
System Information:

PyTorch Version (e.g., 1.0): Caffer2 tag v0.4.0

OS (e.g., Linux): AIX

How you installed PyTorch (conda, pip, source): Build from source (tag v0.4.0)

Build command you used (if compiling from source):
Python version: Python 2.7

CUDA/cuDNN version: NA

GPU models and configuration: NA


Any pointers on this will be helpful.