452676ffd8
The original code as below intend to set the character before last column to CHAR_NULL. Line[(LastCol % (ARRAY_SIZE (Line) - 1)) - 1] = CHAR_NULL; But when LastCol % (ARRAY_SIZE (Line) - 1)) equals to 0, Line[-1] is modified. We should change to code as below: Line[(LastCol - 1) % (ARRAY_SIZE (Line) - 1)] = CHAR_NULL; Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Jaben Carsey <jaben.carsey@intel.com> Reviewed-by: Hao A Wu <hao.a.wu@intel.com>