segmentation fault when import pytorch_lightning
I am trying the very minimum code which imports torch and pytorch_lightning, with the following code:
import pytorch_lightning as pl

The import of pytorch_lightning fails immediately with the error: 29144 segmentation fault (core dumped)  python
I am using pytorch-dev 1.7.0 as it is required for cuda11 with new GPUs, and I installed pytorch-lightning from source.

OS: Linux
Packaging: pip
Version 1.0.2