program times out on go playground and runs but with race on mac running go1.16beta

[DrGo]

if I run this program in the playground, I get: timeout running program Program exited: status 1

https://play.golang.org/p/5cDYasXtl_n

If I run it on my macos Catalina machine with go 1.16 beta I get a data race warning

```

WARNING: DATA RACE

Read at 0x00c00011a2a0 by goroutine 10:

  main.New.func1()

     watcher/cmd/main.go:52 +0x29a

Previous write at 0x00c00011a2a0 by main goroutine:

  main.New()

     watcher/cmd/main.go:65 +0x36f

  main.main()

     watcher/cmd/main.go:91 +0x154

Goroutine 10 (running) created at:

  main.New()

     watcher/cmd/main.go:45 +0x304

  main.main()

     watcher/cmd/main.go:91 +0x154

```

I do not see any writing except in one spot in line 91.

What am I missing?

Thanks

[Carla Pfaff]

    result <- Event{event, err}

reads the `err` variable in one goroutine, and

    err = watcher.Add(dir)

writes the same `err` variable in another goroutine.

[DrGo]

Thanks a million 

Totally missed that first err was not limited to the scope of the case or the go routine.