fix test_tracker again (synchronous session destruction is required)
fix test_tracker again (synchronous session destruction is required)
hamedramzi/libtorrent,hamedramzi/libtorrent,snowyu/libtorrent,snowyu/libtorrent,TeoTwawki/libtorrent,snowyu/libtorrent,snowyu/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,hamedramzi/libtorrent,TeoTwawki/libtorrent,TeoTwawki/libtorrent,hamedramzi/libtorrent,snowyu/libtorrent,snowyu/libtorrent,TeoTwawki/libtorrent