如何解决Go中的'致命错误：并发映射读取和映射写入”？

var (
  someMap      = map[string]string{}
  someMapMutex = sync.RWMutex{}
)

// Read operation
func getSomeValue() {
  someMapMutex.RLock()
  defer someMapMutex.RUnlock()

  val := someMap["key"]
  // Use val...
}

// Write operation
func setSomeValue() {
  someMapMutex.Lock()
  defer someMapMutex.Unlock()

  someMap["key"] = "value"
}

import "sync"

var (
  someMap = syncmap.Map{}
)

func iterateOverMap() {
  someMap.Range(func(key, value interface{}) bool {
    // Use key and value...
    return true  // Continue iterating
  })
}