  cff_index_forget_element( CFF_Index  idx,
                            FT_Byte**  pbytes )
  {
    if ( idx->bytes == 0 )
    {
      FT_Stream  stream = idx->stream;


      FT_FRAME_RELEASE( *pbytes );
    }
  }

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