==================
WARNING: DATA RACE
Read at 0x00c000d741e0 by goroutine 52:
  github.com/docker/docker/libcontainerd/supervisor.(*remote).monitorDaemon()
      /go/src/github.com/docker/docker/libcontainerd/supervisor/remote_daemon.go:332 +0xf3b
  github.com/docker/docker/libcontainerd/supervisor.Start.func1()
      /go/src/github.com/docker/docker/libcontainerd/supervisor/remote_daemon.go:99 +0x4f

Previous write at 0x00c000d741e0 by goroutine 54:
  github.com/docker/docker/libcontainerd/supervisor.(*remote).startContainerd.func1()
      /go/src/github.com/docker/docker/libcontainerd/supervisor/remote_daemon.go:198 +0x104

Goroutine 52 (running) created at:
  github.com/docker/docker/libcontainerd/supervisor.Start()
      /go/src/github.com/docker/docker/libcontainerd/supervisor/remote_daemon.go:99 +0x84c
  main.(*DaemonCli).initContainerd()
      /go/src/github.com/docker/docker/cmd/dockerd/daemon_unix.go:141 +0x3ec
  main.(*DaemonCli).start()
      /go/src/github.com/docker/docker/cmd/dockerd/daemon.go:184 +0xf74
  main.runDaemon()
      /go/src/github.com/docker/docker/cmd/dockerd/docker_unix.go:13 +0x12e
  main.newDaemonCommand.func1()
      /go/src/github.com/docker/docker/cmd/dockerd/docker.go:37 +0x12f
  github.com/spf13/cobra.(*Command).execute()
      /go/src/github.com/docker/docker/vendor/github.com/spf13/cobra/command.go:983 +0xf77
  github.com/spf13/cobra.(*Command).ExecuteC()
      /go/src/github.com/docker/docker/vendor/github.com/spf13/cobra/command.go:1115 +0x657
  github.com/spf13/cobra.(*Command).Execute()
      /go/src/github.com/docker/docker/vendor/github.com/spf13/cobra/command.go:1039 +0x254
  main.main()
      /go/src/github.com/docker/docker/cmd/dockerd/docker.go:106 +0x255

Goroutine 54 (running) created at:
  github.com/docker/docker/libcontainerd/supervisor.(*remote).startContainerd()
      /go/src/github.com/docker/docker/libcontainerd/supervisor/remote_daemon.go:182 +0x964
  github.com/docker/docker/libcontainerd/supervisor.(*remote).monitorDaemon()
      /go/src/github.com/docker/docker/libcontainerd/supervisor/remote_daemon.go:290 +0x3c4
  github.com/docker/docker/libcontainerd/supervisor.Start.func1()
      /go/src/github.com/docker/docker/libcontainerd/supervisor/remote_daemon.go:99 +0x4f
==================