Example of setting a channel to nil from a receiver while still closing it from the caller.

nil_chan.go

package main

import (
	"fmt"
	"time"
)

func main() {
	
	c := make(chan int)
	fmt.Printf("%#v\n", c)
	
	go func(c chan int) { 
		c <- 1
		c = nil
		fmt.Printf("Nil: %#v\n", c)
	}(c)
	
	go func() {
		time.Sleep(100 * time.Millisecond)
		close(c)
		fmt.Printf("Closed: %#v\n", c)
	}()
	
	
	for v := range c {
	    fmt.Println(v)
	}
	

	fmt.Println("Finished")
}


// More reading:
// https://medium.com/justforfunc/why-are-there-nil-channels-in-go-9877cc0b2308
// https://blogtitle.github.io/go-advanced-concurrency-patterns-part-1