Logger panic: SIGFAULT when main func Quit

[Raxel01]

Describe the bug
after a return on a main function
defer Logger.Sync() is called and panic SIGFAULT is raised

To Reproduce
...

Expected behavior
Just close the program without panic segfault
after I removed defer env.Logger.Sync() it works cool
Additional context
func main() {
defer env.Logger.Sync()

var err error
env.Logger, err = zap.NewProduction()
if err != nil {
	log.Fatalf("could not create zap logger: %v", err)
}

zap.ReplaceGlobals(env.Logger)
if !service.functionThatReturnFalse(){
             //when return is hit the program segfault !
	return
}

Some implementation code is removed .....  
router.Run(":" + port)

}