model_dump: Fix memory computation when both constants and data tensors are present (#66006)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66006
Previously, this was resulting in a key collision and a crash.
ghstack-source-id: 139342089
Test Plan: Ran webdriver test locally.
Reviewed By: dhruvbird
Differential Revision: D31281092
fbshipit-source-id: f31311726c681d6d7e0504ff8e84c888af9054f0
