downloaded: half open race

[dvovk]

==================
WARNING: DATA RACE
Write at 0x00c000b015e0 by goroutine 17410:
  github.com/anacrolix/torrent.(*Client).noLongerHalfOpen()
      github.com/anacrolix/torrent/client.go:695 +0xec
  github.com/anacrolix/torrent.(*Client).outgoingConnection()
      github.com/anacrolix/torrent/client.go:897 +0x184
  github.com/anacrolix/torrent.initiateConn.gowrap2()
      github.com/anacrolix/torrent/torrent.go:3143 +0xa0

Previous read at 0x00c000b015e0 by goroutine 21281:
  github.com/anacrolix/torrent.(*Torrent).openNewConns()
      github.com/anacrolix/torrent/torrent.go:1737 +0x34c
  github.com/anacrolix/torrent.(*Torrent).dropConnection()
      github.com/anacrolix/torrent/torrent.go:2012 +0x84
  github.com/anacrolix/torrent.(*PeerConn).drop()
      github.com/anacrolix/torrent/peerconn.go:1267 +0x60
  github.com/anacrolix/torrent.(*Torrent).maybeDropMutuallyCompletePeer()
      github.com/anacrolix/torrent/torrent.go:1305 +0x268
  github.com/anacrolix/torrent.(*PeerConn).peerPiecesChanged()
      github.com/anacrolix/torrent/peerconn.go:1390 +0x60
  github.com/anacrolix/torrent.(*PeerConn).onPeerHasAllPieces()
      github.com/anacrolix/torrent/peerconn.go:577 +0x21c
  github.com/anacrolix/torrent.(*PeerConn).onPeerSentHaveAll()
      github.com/anacrolix/torrent/peerconn.go:581 +0x3c
  github.com/anacrolix/torrent.(*PeerConn).mainReadLoop()
      github.com/anacrolix/torrent/peerconn.go:1027 +0x1440
  github.com/anacrolix/torrent.(*Torrent).runHandshookConn()
      github.com/anacrolix/torrent/client.go:1132 +0x1d0
  github.com/anacrolix/torrent.(*Torrent).logRunHandshookConn()
      github.com/anacrolix/torrent/torrent.go:2111 +0x5c
  github.com/anacrolix/torrent.(*Torrent).runHandshookConnLoggingErr()
      github.com/anacrolix/torrent/torrent.go:2118 +0x70
  github.com/anacrolix/torrent.(*Client).outgoingConnection()
      github.com/anacrolix/torrent/client.go:915 +0x5dc
  github.com/anacrolix/torrent.initiateConn.gowrap2()
      github.com/anacrolix/torrent/torrent.go:3143 +0xa0

Goroutine 17410 (running) created at:
  github.com/anacrolix/torrent.initiateConn()
      github.com/anacrolix/torrent/torrent.go:3143 +0x5a8
  github.com/anacrolix/torrent.(*Torrent).openNewConns()
      github.com/anacrolix/torrent/torrent.go:1749 +0x538
  github.com/anacrolix/torrent.(*Torrent).addPeer()
      github.com/anacrolix/torrent/torrent.go:394 +0x95c
  github.com/anacrolix/torrent.(*Torrent).addPeers()
      github.com/anacrolix/torrent/torrent.go:2351 +0x128
  github.com/anacrolix/torrent.(*Torrent).AddPeers()
      github.com/anacrolix/torrent/t.go:365 +0x6c
  github.com/anacrolix/torrent.(*trackerScraper).announce()
      github.com/anacrolix/torrent/tracker_scraper.go:219 +0x15bc
  github.com/anacrolix/torrent.(*trackerScraper).Run()
      github.com/anacrolix/torrent/tracker_scraper.go:258 +0x2f8
  github.com/anacrolix/torrent.(*Torrent).startScrapingTracker.func1.gowrap1()
      github.com/anacrolix/torrent/torrent.go:2182 +0x38

      Goroutine 21281 (finished) created at:
      github.com/anacrolix/torrent.initiateConn()
          github.com/anacrolix/torrent/torrent.go:3143 +0x5a8
      github.com/anacrolix/torrent.(*Torrent).openNewConns()
          github.com/anacrolix/torrent/torrent.go:1749 +0x538
      github.com/anacrolix/torrent.(*Torrent).addPeer()
          github.com/anacrolix/torrent/torrent.go:394 +0x95c
      github.com/anacrolix/torrent.(*Torrent).addPeers()
          github.com/anacrolix/torrent/torrent.go:2351 +0x128
      github.com/anacrolix/torrent.(*Torrent).AddPeers()
          github.com/anacrolix/torrent/t.go:365 +0x6c
      github.com/anacrolix/torrent.(*trackerScraper).announce()
          github.com/anacrolix/torrent/tracker_scraper.go:219 +0x15bc
      github.com/anacrolix/torrent.(*trackerScraper).Run()
          github.com/anacrolix/torrent/tracker_scraper.go:258 +0x2f8
      github.com/anacrolix/torrent.(*Torrent).startScrapingTracker.func1.gowrap1()
          github.com/anacrolix/torrent/torrent.go:2182 +0x38
    ==================

[dvovk]

erigontech/torrent#37