add buffer for nullptr res

雾聪

2024-01-15 37f078ef5f9f6b2d01a8fa0b15c460190b906c87

1
2
3
4
5
6
7
8
9
x    1
xx    2
xxx    3
xl    4
l    5
lx    6
lxx    7
lxxx    8
xc    9