{"record":{"id":"13080f20cc7451f2","repo":"wavetermdev/waveterm","slug":"gofmt-failed-w-output-s","errorCode":null,"errorMessage":"gofmt failed: %w\nOutput: %s","messagePattern":"gofmt failed: %w\nOutput: (.+?)","errorType":"error_code","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/waveappstore/waveappstore.go","lineNumber":435,"sourceCode":"\t}\n\n\tfilePath, err := validateAndResolveFilePath(appDir, fileName)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tif filepath.Ext(filePath) != \".go\" {\n\t\treturn fmt.Errorf(\"file is not a Go file: %s\", fileName)\n\t}\n\n\tgofmtPath, err := waveapputil.ResolveGoFmtPath()\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to resolve gofmt path: %w\", err)\n\t}\n\n\tcmd := exec.Command(gofmtPath, \"-w\", filePath)\n\tif output, err := cmd.CombinedOutput(); err != nil {\n\t\treturn fmt.Errorf(\"gofmt failed: %w\\nOutput: %s\", err, string(output))\n\t}\n\n\treturn nil\n}\n\nfunc ListAllAppFiles(appId string) (*fileutil.ReadDirResult, error) {\n\tif err := ValidateAppId(appId); err != nil {\n\t\treturn nil, fmt.Errorf(\"invalid appId: %w\", err)\n\t}\n\n\tappDir, err := GetAppDir(appId)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tif _, err := os.Stat(appDir); os.IsNotExist(err) {\n\t\treturn nil, fmt.Errorf(\"app directory does not exist: %s\", appDir)\n\t}","sourceCodeStart":417,"sourceCodeEnd":453,"githubUrl":"https://github.com/wavetermdev/waveterm/blob/a4447c1563b2df285ab89e76c82f91e1a1a49c1e/pkg/waveappstore/waveappstore.go#L417-L453","documentation":"FormatGoFile runs `gofmt -w <filePath>` and captures combined stdout/stderr. If gofmt exits non-zero — meaning the Go source has syntax errors or gofmt could not write the file — the error is wrapped as \"gofmt failed\" including the process output. The output section contains gofmt's own diagnostic, typically the parse error with line/column.","triggerScenarios":"Running FormatGoFile on a .go file containing syntax errors (unclosed brace, invalid tokens) or a file gofmt cannot write (permissions/locked file).","commonSituations":"Saving a partially edited Go file and hitting format before it parses; generated code with template placeholders not yet filled in; corrupted file from an interrupted write.","solutions":["Read the `Output:` portion of the error — gofmt reports the exact line/column of the syntax error — and fix the source","Only invoke format on parseable files; run a parser/linter check first if available","Check file write permissions if the syntax looks valid (gofmt -w needs write access)","Fix the syntax error at the reported location and retry FormatGoFile"],"exampleFix":"// before\nfunc main() {\n    fmt.Println(\"hi\")\n// after\nfunc main() {\n\tfmt.Println(\"hi\")\n}","handlingStrategy":"try-catch","validationCode":"if err := parser.ParseFile(token.NewFileSet(), filePath, nil, parser.ParseComments); err != nil {\n\treturn fmt.Errorf(\"file has syntax errors, fix before formatting: %v\", err)\n}","typeGuard":null,"tryCatchPattern":"if err := FormatGoFile(appId, fileName); err != nil {\n\tif strings.Contains(err.Error(), \"gofmt failed\") {\n\t\tvar gofmtOutput string\n\t\tif idx := strings.Index(err.Error(), \"Output: \"); idx >= 0 {\n\t\t\tgofmtOutput = err.Error()[idx+len(\"Output: \"):]\n\t\t}\n\t\treturn fmt.Errorf(\"syntax error in %s: %s\", fileName, gofmtOutput)\n\t}\n\treturn err\n}","preventionTips":["Fix gofmt-reported line/column errors before retrying formatting","Avoid formatting files mid-edit or with unfilled template placeholders","Keep files writable by the server user so gofmt -w can save in place"],"tags":["gofmt","syntax-error","go"],"backgroundTag":"gofmt-failed","analyzedSha":"a4447c1563b2df285ab89e76c82f91e1a1a49c1e","analyzedAt":"2026-09-01T15:26:23.972Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}