  gray_find_cell( RAS_ARG )
  {
    PCell  *pcell, cell;
    TPos    x = ras.ex;


    if ( x > ras.count_ex )
      x = ras.count_ex;

    pcell = &ras.ycells[ras.ey];
    for (;;)
    {
      cell = *pcell;
      if ( cell == NULL || cell->x > x )
        break;

      if ( cell->x == x )
        goto Exit;

      pcell = &cell->next;
    }

    if ( ras.num_cells >= ras.max_cells )
      ft_longjmp( ras.jump_buffer, 1 );

    cell        = ras.cells + ras.num_cells++;
    cell->x     = x;
    cell->area  = 0;
    cell->cover = 0;

    cell->next  = *pcell;
    *pcell      = cell;

  Exit:
    return cell;
  }

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.