Segmentation fault when running generate_occupancy_nuscenes.py

[yunxiaoshi]

Hi authors, first thanks for releasing this amazing work!

I hit a Segmentation fault when generating occupancy labels on nuScenes. It was a bit random usually happens after having successfully processed several sequences, e.g. sequence 7 or 9. As for env set up I'm using open3d==0.9.0, python=3.7 with cuda 11.3.

Any idea what could cause this? Thanks

[yunxiaoshi]

Reducing n_threads in o3d.geometry.TriangleMesh.create_from_point_cloud_poisson seems to help