  Ins_SHPIX( INS_ARG )
  {
    FT_F26Dot6  dx, dy;
    FT_UShort   point;


    if ( CUR.top < CUR.GS.loop + 1 )
    {
      CUR.error = TT_Err_Invalid_Reference;
      return;
    }

#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
    if ( CUR.face->unpatented_hinting )
    {
      if ( CUR.GS.both_x_axis )
      {
        dx = TT_MulFix14( (FT_UInt32)args[0], 0x4000 );
        dy = 0;
      }
      else
      {
        dx = 0;
        dy = TT_MulFix14( (FT_UInt32)args[0], 0x4000 );
      }
    }
    else
#endif
    {
      dx = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.x );
      dy = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.y );
    }

    while ( CUR.GS.loop > 0 )
    {
      CUR.args--;

      point = (FT_UShort)CUR.stack[CUR.args];

      if ( BOUNDS( point, CUR.zp2.n_points ) )
      {
        if ( CUR.pedantic_hinting )
        {
          CUR.error = TT_Err_Invalid_Reference;
          return;
        }
      }
      else
        MOVE_Zp2_Point( point, dx, dy, TRUE );

      CUR.GS.loop--;
    }

    CUR.GS.loop = 1;
    CUR.new_top = CUR.args;
  }

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.