aaronbee

  func ProcessAll(uuids []string) {
    var myResults []string
    var mutex sync.Mutex
    safeAppend := func(results []string, res string) {
      mutex.Lock()
      myResults = append(myResults, res)
      mutex.Unlock()
    }

    for _, uuid := range uuids {
      go func(id string, results []string) {
        res := Foo(id)
        safeAppend(myResults, id)
      }(uuid, myResults) # <<< unsafe read of myResults
    } 
  }