go runtime_error ai_generated true

恐慌：运行时错误：索引超出范围 [5]，长度为 5（在 goroutine 中）

panic: runtime error: index out of range [5] with length 5 (in goroutine)

ID: go/goroutine-panic-uncaught

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80%修复率
86%置信度
0证据数
2024-08-22首次发现

版本兼容性

版本状态引入弃用备注
1.0 active — — —
1.23 active — — —

根因分析

goroutine 访问数组或切片的越界索引，导致恐慌未被恢复，整个程序崩溃。

English

A goroutine accesses an array or slice index that is out of bounds, causing a panic that is not recovered, crashing the entire program.

generic

解决方案

  1. 90% 成功率 Add a deferred recover inside the goroutine to handle panics gracefully 
    go func() {
    defer func() {
        if r := recover(); r != nil {
            log.Printf("Recovered in goroutine: %v", r)
        }
    }()
    arr := make([]int, 5)
    arr[5] = 10 // panic here
}()
  2. 95% 成功率 Check slice bounds before accessing 
    arr := make([]int, 5)
index := 5
if index < len(arr) {
    arr[index] = 10
} else {
    log.Println("Index out of bounds")
}

无效尝试

常见但无效的做法:

  1. Adding recover in main but not in the goroutine 80% 失败

    Panic in goroutine is not caught by main's recover unless deferred in the goroutine itself.

  2. Using a larger array but not fixing the index logic 70% 失败

    Band-aid solution; index may still go out of bounds in other cases.