"change empty gradient to error"
"change empty gradient to error"

jacquesqiao/Paddle,luotao1/Paddle,pengli09/Paddle,luotao1/Paddle,luotao1/Paddle,reyoung/Paddle,reyoung/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle,Canpio/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle,lispc/Paddle,pkuyym/Paddle,chengduoZH/Paddle,lispc/Paddle,pkuyym/Paddle,pengli09/Paddle,QiJune/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,hedaoyuan/Paddle,QiJune/Paddle,lcy-seso/Paddle,Canpio/Paddle,luotao1/Paddle,lcy-seso/Paddle,Canpio/Paddle,yu239/Paddle,lcy-seso/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,chengduoZH/Paddle,chengduoZH/Paddle,putcn/Paddle,putcn/Paddle,yu239/Paddle,tensor-tang/Paddle,yu239/Paddle,pengli09/Paddle,hedaoyuan/Paddle,hedaoyuan/Paddle,baidu/Paddle,reyoung/Paddle,pengli09/Paddle,putcn/Paddle,hedaoyuan/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,baidu/Paddle,reyoung/Paddle,reyoung/Paddle,putcn/Paddle,lcy-seso/Paddle,baidu/Paddle,lispc/Paddle,Canpio/Paddle,yu239/Paddle,yu239/Paddle,baidu/Paddle,hedaoyuan/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,baidu/Paddle,lispc/Paddle,tensor-tang/Paddle,hedaoyuan/Paddle,yu239/Paddle,tensor-tang/Paddle,reyoung/Paddle,yu239/Paddle,lispc/Paddle,pengli09/Paddle,lispc/Paddle,QiJune/Paddle,lispc/Paddle,Canpio/Paddle,pengli09/Paddle,pkuyym/Paddle,pengli09/Paddle,putcn/Paddle,chengduoZH/Paddle,lispc/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle,QiJune/Paddle,jacquesqiao/Paddle,luotao1/Paddle,pengli09/Paddle,jacquesqiao/Paddle,QiJune/Paddle,hedaoyuan/Paddle,QiJune/Paddle,chengduoZH/Paddle,jacquesqiao/Paddle,putcn/Paddle,hedaoyuan/Paddle,PaddlePaddle/Paddle,yu239/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,Canpio/Paddle