conditionally defined var better error message (#20911)
Summary:
i will do loops in a follow up after some other changes I am working on have landed
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20911
Differential Revision: D15497205
Pulled By: eellison
fbshipit-source-id: 8cac197c6a6045b27b552cbb39e6fc86ca747b18
