ccdGJKPenetration: Segmentation fault about libccd HOT 2 OPEN

    while (1){
        // get triangle nearest to origin
        *nearest = ccdPtNearest(polytope);

        // get next support point
        if (nextSupport(obj1, obj2, ccd, *nearest, &supp) != 0)
            break;

        // expand nearest triangle using new point - supp
        if (expandPolytope(polytope, *nearest, &supp) != 0)
            return -2;
    }

_ccd_inline void _ccdPtNearestUpdate(ccd_pt_t *pt, ccd_pt_el_t *el)
{
    if (ccdEq(pt->nearest_dist, el->dist)){
        if (el->type < pt->nearest_type){
            pt->nearest = el;
            pt->nearest_dist = el->dist;
            pt->nearest_type = el->type;
        }
    }else if (el->dist < pt->nearest_dist){
        pt->nearest = el;
        pt->nearest_dist = el->dist;
        pt->nearest_type = el->type;
    }

    // pt->nearest remains null
    printf("dists: %f %f\n", pt->nearest_dist, el->dist);
}

static void _ccdPtNearestRenew(ccd_pt_t *pt)
{
    ccd_pt_vertex_t *v;
    ccd_pt_edge_t *e;
    ccd_pt_face_t *f;

    pt->nearest_dist = CCD_REAL_MAX;
    pt->nearest_type = 3;
    pt->nearest = NULL;

    ccdListForEachEntry(&pt->vertices, v, ccd_pt_vertex_t, list){
        _ccdPtNearestUpdate(pt, (ccd_pt_el_t *)v);
    }

    ccdListForEachEntry(&pt->edges, e, ccd_pt_edge_t, list){
        _ccdPtNearestUpdate(pt, (ccd_pt_el_t *)e);
    }

    ccdListForEachEntry(&pt->faces, f, ccd_pt_face_t, list){
        _ccdPtNearestUpdate(pt, (ccd_pt_el_t *)f);
    }
}

ccd_pt_el_t *ccdPtNearest(ccd_pt_t *pt)
{
    if (!pt->nearest){
        _ccdPtNearestRenew(pt);
    }
    return pt->nearest;
}