How do nil channels behave?

Receiving from a nil channel

var c chan string

<- c

Receiving from a nil channel will cause a deadlock

Sending to a nil channel

var c chan string
<- c

Sending to a nil channel will deadlock

Ranging over a nil channel

var c chan string
for range c {
}

Ranging over a nil channel will deadlock

Closing a nil channel

var c chan string

close(c)

Closing a nil channel will panic