clear stream during Scanner::Reset()
clear stream during Scanner::Reset()

jacquesqiao/Paddle,putcn/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,QiJune/Paddle,tensor-tang/Paddle,tensor-tang/Paddle,QiJune/Paddle,baidu/Paddle,reyoung/Paddle,QiJune/Paddle,chengduoZH/Paddle,reyoung/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,baidu/Paddle,pkuyym/Paddle,Canpio/Paddle,reyoung/Paddle,putcn/Paddle,luotao1/Paddle,luotao1/Paddle,baidu/Paddle,luotao1/Paddle,putcn/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,QiJune/Paddle,lcy-seso/Paddle,Canpio/Paddle,luotao1/Paddle,luotao1/Paddle,lcy-seso/Paddle,luotao1/Paddle,baidu/Paddle,chengduoZH/Paddle,putcn/Paddle,tensor-tang/Paddle,putcn/Paddle,luotao1/Paddle,pkuyym/Paddle,jacquesqiao/Paddle,jacquesqiao/Paddle,PaddlePaddle/Paddle,baidu/Paddle,reyoung/Paddle,chengduoZH/Paddle,QiJune/Paddle,lcy-seso/Paddle,chengduoZH/Paddle,pkuyym/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,Canpio/Paddle,tensor-tang/Paddle,jacquesqiao/Paddle,reyoung/Paddle,tensor-tang/Paddle,chengduoZH/Paddle,Canpio/Paddle,jacquesqiao/Paddle,lcy-seso/Paddle,QiJune/Paddle,Canpio/Paddle,putcn/Paddle,reyoung/Paddle,Canpio/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle