https://pkg.go.dev/log#Fatalf

Fatalf is equivalent to Printf() followed by a call to os.Exit(1).

see https://go.dev/play/p/iw2MCkHArJZ for example:

package main

import "log"

func main() {
	log.Println("Println will print and not exit")
	log.Fatalf("Fatalf will print and exit")
	log.Println("this line cant reach")
}

/* output:
2009/11/10 23:00:00 Println will print and not exit
2009/11/10 23:00:00 Fatalf will print and exit

Program exited.
*/

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R: @lostluck
R: @jrmccluskey
(just found that you have recently reviewed the go code)