stream.StreamProcess: Only open _err on .open().
stream.StreamProcess: Only open _err on .open().

hmit/livestreamer,sbstp/streamlink,chrippa/livestreamer,Klaudit/livestreamer,javiercantero/streamlink,programming086/livestreamer,lyhiving/livestreamer,caorong/livestreamer,Saturn/livestreamer,bastimeyer/streamlink,mmetak/streamlink,bastimeyer/streamlink,charmander/livestreamer,flijloku/livestreamer,back-to/streamlink,chrippa/livestreamer,Masaz-/livestreamer,chrisnicholls/livestreamer,jtsymon/livestreamer,wlerin/streamlink,sbstp/streamlink,melmorabity/streamlink,gravyboat/streamlink,Feverqwe/livestreamer,beardypig/streamlink,programming086/livestreamer,charmander/livestreamer,chhe/livestreamer,mmetak/streamlink,intact/livestreamer,gravyboat/streamlink,flijloku/livestreamer,chhe/livestreamer,gtmanfred/livestreamer,streamlink/streamlink,jtsymon/livestreamer,blxd/livestreamer,fishscene/streamlink,Dobatymo/livestreamer,derrod/livestreamer,wolftankk/livestreamer,fishscene/streamlink,okaywit/livestreamer,beardypig/streamlink,caorong/livestreamer,Masaz-/livestreamer,Feverqwe/livestreamer,chhe/streamlink,breunigs/livestreamer,hmit/livestreamer,Saturn/livestreamer,ethanhlc/streamlink,chhe/streamlink,okaywit/livestreamer,javiercantero/streamlink,back-to/streamlink,gtmanfred/livestreamer,wlerin/streamlink,streamlink/streamlink,wolftankk/livestreamer,intact/livestreamer,derrod/livestreamer,Klaudit/livestreamer,ethanhlc/streamlink,Dobatymo/livestreamer,lyhiving/livestreamer,breunigs/livestreamer,blxd/livestreamer,melmorabity/streamlink,asermax/livestreamer