deadlock.go

var m1, m2 sync.Mutex

func main() {
  
  var wg sync.WaitGroup
 
  wg.Add(1)
  go func() {
    defer wg.Done()
    m1.Lock()
    time.Sleep(time.Second * 2)
    m2.Lock()
  }()
 
  wg.Add(1)
  go func() {
    defer wg.Done()
    m2.Lock()
    time.Sleep(time.Second * 3)
    m1.Lock()
  }()
  
  wg.Wait()
}