Why does fmt.Println inside a goroutine not print a line?

I have the following code:
package main import "net" import "fmt" import "bufio" func main() { conn, _ := net.Dial("tcp", "irc.freenode.net:6667") reader := bufio.NewReader(conn) go func() { str, err := reader.ReadString('\n') if err != nil { // handle it fmt.Println(err) } fmt.Println(str) }() }

If I don't have the code that reads from the buffer in a goroutine, it outputs a message like this, which is what I expect to happen:
:zelazny.freenode.net NOTICE * :*** Looking up your hostname...

However, having it inside a goroutine prints nothing.

Can someone explain why that is?

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