torrent: throw on use after destroy
torrent: throw on use after destroy

joshterrill/webtorrent,yciabaud/webtorrent,jamesliu96/webtorrent,rom1504/webtorrent,feross/webtorrent,jamesliu96/webtorrent,joshterrill/webtorrent,webtorrent/webtorrent,feross/webtorrent,webtorrent/webtorrent,yciabaud/webtorrent,arestov/webtorrent