To reproduce, open the pre-compiled SimplesShapes sample operator included in the TouchDesigner distribution and toggle the GPU Direct flag. This segfaults on both macOS and Windows build version 2023.11170.
I’m 90% sure the title is correct from debugging my own custom operator that shares similar behavior. After enableColor is called prior to allocVBO, getColors returns a null ptr which is then dereferenced to write the color data.
Haven’t tried to reproduce on the stable release.