[go-nuts] 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

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