go config_error ai_generated true

error: net/http: nil CookieJar

ID: go/net-http-cookie-jar-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2026-12-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.20 active — — —
1.21 active — — —

Root Cause

The HTTP client's CookieJar is nil, causing panics when cookies are set or retrieved.

generic

中文

HTTP客户端的CookieJar为nil，导致设置或获取cookie时恐慌。

Workarounds

  1. 95% success Initialize a CookieJar for the client 
    jar, _ := cookiejar.New(nil)
client := &http.Client{Jar: jar}

Dead Ends

Common approaches that don't work:

  1. Ignoring cookie jar entirely 50% fail

    May break cookie-based authentication; always initialize.