Issue with phantom exported in .obj file from Rhinoceros 3D

[Chadchayada-01]

I saved the phantom in .obj from Rhinoceros 3D 7 and here's what I got

1221465 vertices
2439990 faces
173 shells
Separating shells...165/165
/usr/lib/gcc/x86_64-pc-cygwin/15.1.0/include/c++/bits/stl_vector.h:1263: std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator [with _Tp = ThreeVector; _Alloc = std::allocator; reference = ThreeVector&; size_type = long unsigned int]: Assertion '__n < this->size()' failed.