Request: use assert for streaming constructor guard
Request: use assert for streaming constructor guard

savaki/tchannel,benfleis/tchannel,vanloswang/tchannel,RyanTech/tchannel,hustxiaoc/tchannel,benfleis/tchannel,Zirpon/tchannel,chenwenbin928/tchannel,bunnyblue/tchannel,hustxiaoc/tchannel,i/tchannel,sasa233/tchannel,savaki/tchannel,chenwenbin928/tchannel,vanloswang/tchannel,RyanTech/tchannel,RyanTech/tchannel,sasa233/tchannel,Zirpon/tchannel,Zirpon/tchannel,benfleis/tchannel,chenwenbin928/tchannel,vanloswang/tchannel,i/tchannel,hustxiaoc/tchannel,bunnyblue/tchannel,i/tchannel,savaki/tchannel,sasa233/tchannel,bunnyblue/tchannel