go runtime_error ai_generated true

WARNING: DATA RACE Write at 0x00c0000b4010 by goroutine 7:

ID: go/data-race-detector-warning

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2024-07-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.18 active — — —
1.21 active — — —
1.22 active — — —

Root Cause

Two goroutines access the same memory location concurrently, at least one is a write, and no synchronization orders them. Detected only when built with -race; the program otherwise has undefined behavior.

generic

中文

两个 goroutine 并发访问同一内存位置，至少一个是写操作，且没有同步机制排序。仅在 -race 构建时被检测到；否则程序行为未定义。

Workarounds

  1. 95% success 
    Protect the shared variable with a mutex:

var mu sync.Mutex
mu.Lock()
counter++
mu.Unlock()
  2. 92% success 
    Use atomic operations for simple counters:

var counter int64
atomic.AddInt64(&counter, 1)
_ = atomic.LoadInt64(&counter)

Dead Ends

Common approaches that don't work:

  1. 95% fail

    Hiding the report does not fix the race; the bug persists and manifests as corrupted data or crashes in production.

  2. 90% fail

    Sleep reduces the probability but does not establish a happens-before relationship; the race and its undefined behavior remain.