How is ticker exit from for-range?

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1

https://play.golang.org/p/7FI8e7EVJBd

When for-range loop exits is it exit by return from gorotine?
In the above example it never prints line 15, why?

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2

The loop will never exit, as the tickers channel never gets closed.

Because the for loop is infinite due to the fact that the tickers channel will never be closed.

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3

hm, that behavior is quite confusing. it looks like a memory leaking.

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4

The problem with closing is, if you had the following code, you’d get a problem if the tickers channel gets closed, as a closed channel always returns the zero-value:

for {
  select {
    case t <- ticker.C:
      // ...
  }
}

Though if you layed out your code in a different manor, ensuring that stopped tickers don’t get referenced anymore, then even the still left open channel will be GC’d eventually.

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5

I’ve fount that in my case this will solve.

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