{"record":{"id":"f696db860a6cc3ad","repo":"grafana/k6","slug":"record-length-d-doesn-t-match-header-length-d","errorCode":null,"errorMessage":"record length (%d) doesn't match header length (%d)","messagePattern":"record length \\((.+?)\\) doesn't match header length \\((.+?)\\)","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/js/modules/k6/experimental/csv/reader.go","lineNumber":117,"sourceCode":"\tif toLineSet && r.options.ToLine.Int64 > 0 && r.currentLine.Load() > r.options.ToLine.Int64 {\n\t\treturn nil, io.EOF\n\t}\n\n\trecord, err := r.csv.Read()\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tr.currentLine.Add(1)\n\n\t// If header option is enabled, return a map of the record.\n\tif r.options.AsObjects.Valid && r.options.AsObjects.Bool {\n\t\tif r.columnNames == nil {\n\t\t\treturn nil, fmt.Errorf(\"the 'asObjects' option is enabled, but no header was found\")\n\t\t}\n\n\t\tif len(record) != len(r.columnNames) {\n\t\t\treturn nil, fmt.Errorf(\"record length (%d) doesn't match header length (%d)\", len(record), len(r.columnNames))\n\t\t}\n\n\t\trecordMap := make(map[string]string)\n\t\tfor i, value := range record {\n\t\t\trecordMap[r.columnNames[i]] = value\n\t\t}\n\n\t\treturn recordMap, nil\n\t}\n\n\treturn record, nil\n}\n\n// validateOptions validates the reader options and returns an error if any validation fails.\nfunc validateOptions(options options) error {\n\tvar (\n\t\tfromLineSet      = options.FromLine.Valid\n\t\ttoLineSet        = options.ToLine.Valid","sourceCodeStart":99,"sourceCodeEnd":135,"githubUrl":"https://github.com/grafana/k6/blob/93accf6570dcd306ca5e99cc44c393ee3797761b/internal/js/modules/k6/experimental/csv/reader.go#L99-L135","documentation":"Error \"record length (%d) doesn't match header length (%d)\" thrown in grafana/k6.","triggerScenarios":"Thrown at internal/js/modules/k6/experimental/csv/reader.go:117 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"93accf6570dcd306ca5e99cc44c393ee3797761b","analyzedAt":"2026-08-15T21:23:27.118Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}