go runtime_error ai_generated true

panic: runtime error: invalid memory address or nil pointer dereference (atomic load)

ID: go/atomic-operation-misuse

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-10-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.4 active — — —
1.23 active — — —

Root Cause

Using atomic operations on a nil pointer or unaligned memory, causing a panic.

generic

中文

对空指针或未对齐的内存使用原子操作，导致恐慌。

Workarounds

  1. 95% success Ensure pointer is initialized before atomic operations 
    var val int64
atomic.StoreInt64(&val, 42)
  2. 90% success Use atomic.Value for arbitrary types 
    var v atomic.Value
v.Store(42)
val := v.Load().(int)

Dead Ends

Common approaches that don't work:

  1. Using mutex instead of atomic but not initializing pointer 60% fail

    Mutex also requires valid pointer; same issue.

  2. Ignoring alignment requirements for atomic operations on struct fields 70% fail

    Atomic operations require natural alignment; panic may occur on some architectures.