{"record":{"id":"aa07a88b06eee2aa","repo":"lionsoul2014/ip2region","slug":"newv4config-w","errorCode":null,"errorMessage":"NewV4Config: %w","messagePattern":"NewV4Config: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"binding/golang/main.go","lineNumber":54,"sourceCode":"\n\t// fmt.Printf(\"xdbPath=%s\\n\", xdbPath)\n\treturn xdbPath, nil\n}\n\nfunc createService(v4XdbPath string, v4CachePolicy string, v6XdbPath string, v6CachePolicy string) (*service.Ip2Region, error) {\n\t// try to create v4 config\n\tv4CPolicy, err := service.CachePolicyFromName(v4CachePolicy)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"parse v4 cache policy: %w\", err)\n\t}\n\n\tv4DbPath, err := homedir.Expand(v4XdbPath)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"Expand(`%s`): %s\", v4XdbPath, err)\n\t}\n\tv4Config, err := service.NewV4Config(v4CPolicy, v4DbPath, 1)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"NewV4Config: %w\", err)\n\t}\n\n\t// try to create v6 config\n\tv6Policy, err := service.CachePolicyFromName(v6CachePolicy)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"parse v6 cache policy: %w\", err)\n\t}\n\n\tv6DbPath, err := homedir.Expand(v6XdbPath)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"Expand(`%s`): %s\", v6XdbPath, err)\n\t}\n\tv6Config, err := service.NewV6Config(v6Policy, v6DbPath, 1)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"NewV6Config: %w\", err)\n\t}\n\n\treturn service.NewIp2Region(v4Config, v6Config)","sourceCodeStart":36,"sourceCodeEnd":72,"githubUrl":"https://github.com/lionsoul2014/ip2region/blob/c1a1fc7d5941760db3f8431dc05c48cf7f0e30a1/binding/golang/main.go#L36-L72","documentation":"Go service factory: NewV4Config (open/verify header/check ip version/load caches for the v4 xdb) failed and the error is wrapped with this prefix; the underlying cause identifies the actual step that broke.","triggerScenarios":"Thrown at binding/golang/main.go:54 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Inspect the wrapped error to find the failing step (open, verify, header, version match, cache load)","Confirm the v4 xdb path points to a valid IPv4 database","Fix or regenerate the xdb file, then retry service creation"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"c1a1fc7d5941760db3f8431dc05c48cf7f0e30a1","analyzedAt":"2026-09-02T16:58:39.988Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T21:17:11.164Z"}