{"record":{"id":"8b19d2ebe77e043d","repo":"wavetermdev/waveterm","slug":"json-syntax-error-at-line-d-col-d-v","errorCode":null,"errorMessage":"json syntax error at line %d, col %d: %v","messagePattern":"json syntax error at line (.+?), col (.+?): (.+?)","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/wconfig/settingsconfig.go","lineNumber":540,"sourceCode":"\t\tcerrs = append(cerrs, ConfigError{File: fileName, Err: readErr.Error()})\n\t}\n\tif len(barr) == 0 {\n\t\treturn nil, cerrs\n\t}\n\tvar rtn waveobj.MetaMapType\n\terr := json.Unmarshal(barr, &rtn)\n\tif err != nil {\n\t\tif syntaxErr, ok := err.(*json.SyntaxError); ok {\n\t\t\toffset := syntaxErr.Offset\n\t\t\tif offset > 0 {\n\t\t\t\toffset = offset - 1\n\t\t\t}\n\t\t\tlineNum, colNum := utilfn.GetLineColFromOffset(barr, int(offset))\n\t\t\tisTrailingComma := isTrailingCommaError(barr, int(offset))\n\t\t\tif isTrailingComma {\n\t\t\t\terr = fmt.Errorf(\"json syntax error at line %d, col %d: probably an extra trailing comma: %v\", lineNum, colNum, syntaxErr)\n\t\t\t} else {\n\t\t\t\terr = fmt.Errorf(\"json syntax error at line %d, col %d: %v\", lineNum, colNum, syntaxErr)\n\t\t\t}\n\t\t}\n\t\tcerrs = append(cerrs, ConfigError{File: fileName, Err: err.Error()})\n\t}\n\n\t// Resolve environment variable replacements\n\tif rtn != nil {\n\t\tresolveEnvReplacements(rtn)\n\t}\n\n\treturn rtn, cerrs\n}\n\nfunc readConfigFileFS(fsys fs.FS, logPrefix string, fileName string) (waveobj.MetaMapType, []ConfigError) {\n\tbarr, readErr := fs.ReadFile(fsys, fileName)\n\tif readErr != nil {\n\t\t// If we get an error, we may be using the wrong path separator for the given FS interface. Try switching the separator.\n\t\tbarr, readErr = fs.ReadFile(fsys, filepath.ToSlash(fileName))","sourceCodeStart":522,"sourceCodeEnd":558,"githubUrl":"https://github.com/wavetermdev/waveterm/blob/a4447c1563b2df285ab89e76c82f91e1a1a49c1e/pkg/wconfig/settingsconfig.go#L522-L558","documentation":"Generic JSON syntax error wrapper emitted while reading Wave configuration files: when json.SyntaxError occurs and it is not detected as a trailing comma, the error is reported as 'json syntax error at line %d, col %d' with the raw syntax error appended. Results are collected as ConfigError and surfaced by GenerateWshClient, GenerateWaveObjMetaConsts, and GenerateSettingsMetaConsts.","triggerScenarios":"Any malformed JSON in a Wave config file other than a trailing comma: unclosed braces, unquoted keys, single quotes, invalid escapes, stray characters at the reported line/col.","commonSituations":"Typos when hand-editing settings.json or presets files; partial file writes after a crash; accidentally saving the file as JSON5/JSONC syntax that strict JSON rejects; template placeholders like {{var}} left unexpanded.","solutions":["Go to the reported line/column and fix the syntax error indicated by the wrapped message","Validate the whole file with a strict JSON parser to catch additional errors","Restore the file from a backup or let Wave regenerate defaults if the file is corrupted","Check for editor auto-substitutions (smart quotes) or unescaped backslashes in strings"],"exampleFix":"// before (settings.json)\n{ 'term:disable': false }\n// after\n{ \"term:disable\": false }","handlingStrategy":"validation","validationCode":"if err := json.Valid(data); !err {\n    var se *json.SyntaxError\n    json.Unmarshal(data, &any) // force syntax error capture\n    _ = se\n    return fmt.Errorf(\"invalid JSON config\")\n}","typeGuard":null,"tryCatchPattern":"if err := readConfig(); err != nil {\n    var cerrs []wconfig.ConfigError\n    if errors.As(err, &cerrs) {\n        for _, ce := range cerrs { log.Printf(\"%s: %s\", ce.File, ce.Err) }\n    }\n}","preventionTips":["Validate JSON with json.Valid or a linter before writing config files","Avoid hand-editing; use Wave's config commands where possible","Watch for smart quotes and unescaped backslashes introduced by editors","Back up settings.json before bulk edits"],"tags":["json","syntax-error","config","parsing","go"],"backgroundTag":"json-syntax-error","analyzedSha":"a4447c1563b2df285ab89e76c82f91e1a1a49c1e","analyzedAt":"2026-09-01T15:26:23.972Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}