  Horizontal_Gray_Sweep_Span( RAS_ARGS Short       y,
                                       FT_F26Dot6  x1,
                                       FT_F26Dot6  x2,
                                       PProfile    left,
                                       PProfile    right )
  {
    /* nothing, really */
    FT_UNUSED_RASTER;
    FT_UNUSED( y );
    FT_UNUSED( x1 );
    FT_UNUSED( x2 );
    FT_UNUSED( left );
    FT_UNUSED( right );
  }

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.