{"record":{"id":"1ad7c65f255f5014","repo":"router-for-me/CLIProxyAPI","slug":"xai-device-code-response-is-nil","errorCode":null,"errorMessage":"xai device code: response is nil","messagePattern":"xai device code: response is nil","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/auth/xai/xai.go","lineNumber":199,"sourceCode":"\tif err != nil {\n\t\treturn nil, err\n\t}\n\ttokenEndpoint := \"\"\n\tif deviceCode != nil {\n\t\ttokenEndpoint = strings.TrimSpace(deviceCode.TokenEndpoint)\n\t}\n\treturn &AuthBundle{\n\t\tTokenData:     *tokenData,\n\t\tLastRefresh:   time.Now().UTC().Format(time.RFC3339),\n\t\tBaseURL:       DefaultAPIBaseURL,\n\t\tTokenEndpoint: tokenEndpoint,\n\t}, nil\n}\n\n// PollForToken polls the token endpoint until the user authorizes or the device code expires.\nfunc (a *XAIAuth) PollForToken(ctx context.Context, deviceCode *DeviceCodeResponse) (*TokenData, error) {\n\tif deviceCode == nil {\n\t\treturn nil, fmt.Errorf(\"xai device code: response is nil\")\n\t}\n\tif ctx == nil {\n\t\tctx = context.Background()\n\t}\n\n\ttokenEndpoint := strings.TrimSpace(deviceCode.TokenEndpoint)\n\tif tokenEndpoint == \"\" {\n\t\tdiscovery, errDiscover := a.Discover(ctx)\n\t\tif errDiscover != nil {\n\t\t\treturn nil, errDiscover\n\t\t}\n\t\ttokenEndpoint = discovery.TokenEndpoint\n\t}\n\n\tinterval := time.Duration(deviceCode.Interval) * time.Second\n\tif interval < defaultPollInterval {\n\t\tinterval = defaultPollInterval\n\t}","sourceCodeStart":181,"sourceCodeEnd":217,"githubUrl":"https://github.com/router-for-me/CLIProxyAPI/blob/78f0c4079e3e6273d65d03b5549cffc898703264/internal/auth/xai/xai.go#L181-L217","documentation":"PollForToken was called with a nil *DeviceCodeResponse. This is a programming-contract violation, not a server condition: the poll loop needs deviceCode.DeviceCode and deviceCode.TokenEndpoint, so it fails fast instead of panicking on a nil dereference.","triggerScenarios":"Calling XAIAuth.PollForToken(ctx, nil) directly, or a caller passing a nil pointer returned from a failed RequestDeviceCode whose error was ignored.","commonSituations":"Caller ignores the error from RequestDeviceCode and passes the resulting nil bundle onward; refactor that made DeviceCodeResponse optional without updating this path; race where the device code is cleared before polling starts.","solutions":["Audit the call site: ensure RequestDeviceCode's error is checked before using its result (idiomatic `if err != nil { return err }` before PollForToken)","Initialize the pointer only on success paths and never share nilable states across goroutines","Keep using WaitForAuthorization, which chains RequestDeviceCode and PollForToken safely"],"exampleFix":"// before\ndeviceCode, _ := auth.RequestDeviceCode(ctx)\nauth.PollForToken(ctx, deviceCode) // panics guard: nil\n\n// after\ndeviceCode, err := auth.RequestDeviceCode(ctx)\nif err != nil {\n    return err\n}\nauth.PollForToken(ctx, deviceCode)","handlingStrategy":"validation","validationCode":"deviceCode, err := auth.RequestDeviceCode(ctx)\nif err != nil {\n    return err\n}\nif deviceCode == nil {\n    return fmt.Errorf(\"device code response unexpectedly nil\")\n}","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Always check the error from RequestDeviceCode before using its result","Prefer WaitForAuthorization, which chains request+poll correctly"],"tags":["xai","auth","nil-check","programmer-error"],"backgroundTag":null,"analyzedSha":"78f0c4079e3e6273d65d03b5549cffc898703264","analyzedAt":"2026-08-15T12:26:37.444Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}