OBJ importer crashing browsing folder

[parkerlreed]

Describe the bug
Loading this folder and browsing between models with arrow keys causes a crash with the OBJ importer.

https://github.com/PiLiDAR/PiLiDAR-Hardware/tree/main/FDM

To Reproduce
Steps to reproduce the behavior:

1. Open the folder with f3d --verbose .
2. Step between the models with left and right arrow keys
3. Observe crash

Expected behavior
To not crash of course! :)

System Information:

• OS: Arch Linux
• GPU and GPU driver: 780M AMDGPU

F3D Information

F3D 3.0.0

F3D - A fast and minimalist 3D viewer
Version: 3.0.0-RC1-15-g7cc980fd.
Build date: 2025-01-09 06:06:00.
Build system: Linux 64-bits.
Compiler: GNU 14.2.1.
Module ImGui: ON.
Module OpenEXR: ON.
Module Raytracing: ON.
VTK version: 9.4.1.
Copyright (C) 2019-2021 Kitware SAS.
Copyright (C) 2021-2024 Michael Migliore, Mathieu Westphal.
License BSD-3-Clause.

Additional context
https://gist.github.com/parkerlreed/3a8bc03bb89cf111b815d0d4f1976478

[mwestphal]

Reproduced with 2.5 and 3.0