for cpp ws srv long wav core dump (#829)

zhaomingwork

2023-08-10 c8465832cdc8eeb4a22c72af85c71f2d3b7c0e47

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X    1
XX    2
XXX    3
XL    4
L    5
LX    6
LXX    7
LXXX    8
XC    9