Hi @buaaduke,
Thanks for the note.
We an issue we are resolving with remote module Python packages in ITK 5.0 RC 2 that causes this segmentation fault. We aim to have these resolved with the 5.0.0 release.
The itk-iomeshstl package will encounter this issue, but the itk.TriangleMeshToBinaryImageFilter should be available in the 5.0 RC 2 packages. It is possible to write the result with one of the other mesh file formats supported by ITK in the meantime.
CC: @fbudin