package main
import (
"sync"
"runtime"
)
type S struct {
chs chan int
}
var wg sync.WaitGroup
func worker(s *S) {
for i := range s.chs {
println("In worker, ch = ", i)
}
wg.Done()
}
func main() {
s := S{make(chan int)}
runtime.SetFinalizer(&s, func(ss *S) {
println("Finalizer")
close(ss.chs)
})
wg.Add(1)
go worker(&s)
for i := 0; i < 1; i++ {
s.chs <- 1
}
runtime.GC()
wg.Wait()
}
*Output (Go 1.8.3):*
In worker, ch = 1
Finalizer
---
As my expectation, runtime.GC() will not collect `s` , because `worker`
still holds a reference to `s.chs`. So that the program would deadlock.
However, this program terminates in go 1.8.3, while deadlocks in go 1.7.
Does something change in go 1.8.3?
I guess it has something to do with `range` and `channel`, but know nothing
more .
Does anyone know what happens to this garbage collection process?
Thanks very much for reading this.
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