another bug fix related to argument handling
another bug fix related to argument handling

0x37N0w4N/slowhttptest,a12689851/slowhttptest,0x37N0w4N/slowhttptest,yeahdongcn/slowhttptest,mentesc/slowhttptest,tectronics/slowhttptest,yeahdongcn/slowhttptest,a12689851/slowhttptest,tectronics/slowhttptest,jack-ju/slowhttptest,mfazliazran/slowhttptest,mentesc/slowhttptest,jengyic/slowhttptest,jengyic/slowhttptest,mfazliazran/slowhttptest,jack-ju/slowhttptest,Chigirin/slowhttptest,Chigirin/slowhttptest