go runtime_error ai_generated true

无效的内存地址或空指针解引用 [信号 SIGSEGV: 分段违规]

invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation]

ID: go/invalid-memory-address-or-nil-pointer-dereference-in-select

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90%修复率
86%置信度
1证据数
2023-08-05首次发现

版本兼容性

版本状态引入弃用备注
go1.18 active — — —
go1.19 active — — —
go1.20 active — — —
go1.21 active — — —

根因分析

在 goroutine 中解引用空指针，通常发生在 select 语句或通道操作中，指针未正确初始化。

English

Dereferencing a nil pointer in a goroutine, often inside a select statement or channel operation where a pointer was not properly initialized.

generic

官方文档

https://go.dev/doc/faq#nil_error

解决方案

  1. Add explicit nil checks before dereferencing: `if ptr != nil { ptr.Field = value } else { log.Fatal("ptr is nil") }`
  2. Initialize all pointers with make or new before use: `ptr = new(StructType)` or `ptr = &StructType{}`

无效尝试

常见但无效的做法:

  1. 90% 失败

    SIGSEGV is a signal, not a panic; recover() cannot catch segmentation violations—the program still crashes.

  2. 70% 失败

    Nil pointer dereference is not a race condition; the pointer is nil regardless of synchronization.