o3d.geometry.VoxelGrid.create_from_triangle_mesh_within_bounds Segmentation fault (core dumped)

[worfsmile]

Checklist

• I have searched for similar issues.
• For Python issues, I have tested with the latest development wheel.
• I have checked the release documentation and the latest documentation (for main branch).

My Question

Describe the bug
When calling o3d.geometry.VoxelGrid.create_from_triangle_mesh_within_bounds on Ubuntu 22.04 with Python 3.10 and Open3D 0.17, even a simple example mesh (e.g., KnotMesh.ply, 1440 vertices / 2880 triangles) causes a Segmentation fault (core dumped).

The same code works fine on Windows with the same Open3D version.

---

To Reproduce
Run the following code:

import sys
import platform
import os
import open3d as o3d
import numpy as np

# Environment info
print("Python version:", sys.version)
print("Platform:", platform.platform())
print("OS name:", os.name)
print("Open3D version:", o3d.__version__)
print("Numpy version:", np.__version__)

# Load example mesh
mesh = o3d.io.read_triangle_mesh(o3d.data.KnotMesh().path)

# Preprocess mesh
mesh.remove_duplicated_vertices()
mesh.remove_degenerate_triangles()
mesh.remove_non_manifold_edges()
mesh.remove_duplicated_triangles()

print(f"Mesh has {len(mesh.vertices)} vertices and {len(mesh.triangles)} triangles.")

# Voxelization
voxel_size = 1 / 2
min_bound = (-0.5, -0.5, -0.5)
max_bound = (0.5, 0.5, 0.5)

voxel_grid = o3d.geometry.VoxelGrid.create_from_triangle_mesh_within_bounds(
    mesh, voxel_size=voxel_size, min_bound=min_bound, max_bound=max_bound
)

print(f"Voxel grid created with {len(voxel_grid.get_voxels())} voxels.")

---

Expected behavior
Voxel grid should be created successfully without a crash.

Actual behavior
Python version: 3.10.18 (main, Jun 5 2025, 13:14:17) [GCC 11.2.0]
Platform: Linux-6.8.0-79-generic-x86_64-with-glibc2.35
OS name: posix
Open3D version: 0.17.0
Numpy version: 2.1.2
Mesh has 1440 vertices and 2880 triangles.
Segmentation fault (core dumped)

---

Environment (please complete the following information):

Python version: 3.10.18 (main, Jun 5 2025, 13:14:17) [GCC 11.2.0]
Platform: Linux-6.8.0-79-generic-x86_64-with-glibc2.35
OS name: posix
Open3D version: 0.17.0
Numpy version: 2.1.2

---

Additional context

• The crash happens regardless of voxel_size (tested with 1/64, 1/32, 1/16, 1/2).
• The crash persists even after mesh cleanup (remove_duplicated_vertices, remove_degenerate_triangles, etc.).
• The issue only happens on Linux; on Windows with the same version, the function works as expected.
• This might be related to internal voxelization code in C++ handling bounds incorrectly on Linux.

Would appreciate any insights or suggestions for workarounds. Thanks!

[worfsmile]

And the segmentation fault occurs immediately when calling mesh.scale() or mesh.translate() on the same
equipment.