{
  "id": "go/goroutine-race-on-slice",
  "signature": "fatal error: concurrent slice append",
  "signature_zh": "致命错误：并发切片追加",
  "regex": "fatal\\ error:\\ concurrent\\ slice\\ append",
  "domain": "go",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "Multiple goroutines append to the same slice concurrently without synchronization, causing data races and potential panics.",
  "root_cause_type": "generic",
  "root_cause_zh": "多个 goroutine 同时向同一个切片追加数据而没有同步，导致数据竞争和潜在的恐慌。",
  "versions": [
    {
      "version": "1.20",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "1.21",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "If slice is also accessed directly, race persists.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Atomic operations don't help with slice growth; underlying array may be replaced.",
      "fail_rate": 0.85,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.95,
      "how": "var mu sync.Mutex; mu.Lock(); slice = append(slice, item); mu.Unlock()",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.9,
      "how": "ch := make(chan int); go func() { for v := range ch { slice = append(slice, v) } }()",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.88,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-03-01",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}