{"record":{"id":"e3fb9cde7d1c9e93","repo":"plandex-ai/plandex","slug":"failed-to-seek-in-temporary-file-w","errorCode":null,"errorMessage":"failed to seek in temporary file: %w","messagePattern":"failed to seek in temporary file: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"app/cli/upgrade.go","lineNumber":125,"sourceCode":"\t}\n\tdefer resp.Body.Close()\n\n\t// Create a temporary file to save the downloaded archive\n\ttempFile, err := os.CreateTemp(\"\", \"*.tar.gz\")\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to create temporary file: %w\", err)\n\t}\n\tdefer os.Remove(tempFile.Name()) // Clean up file afterwards\n\n\t// Copy the response body to the temporary file\n\t_, err = io.Copy(tempFile, resp.Body)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to save the downloaded archive: %w\", err)\n\t}\n\n\t_, err = tempFile.Seek(0, 0)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to seek in temporary file: %w\", err)\n\t}\n\n\t// Now, extract the binary from the tempFile\n\tgzr, err := gzip.NewReader(tempFile)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"failed to create gzip reader: %w\", err)\n\t}\n\tdefer gzr.Close()\n\n\ttarReader := tar.NewReader(gzr)\n\tfor {\n\t\theader, err := tarReader.Next()\n\t\tif err == io.EOF {\n\t\t\tbreak // End of archive\n\t\t}\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"failed to read tar header: %w\", err)\n\t\t}","sourceCodeStart":107,"sourceCodeEnd":143,"githubUrl":"https://github.com/plandex-ai/plandex/blob/e2d772072efadbe41d2946d97d79be55532dbab5/app/cli/upgrade.go#L107-L143","documentation":"After writing the archive, doUpgrade seeks the temp file back to byte 0 before decompression. If the Seek call fails, it returns 'failed to seek in temporary file: %w'. This is rare and indicates the temp file handle is no longer usable (closed, or on a filesystem that cannot seek).","triggerScenarios":"tempFile.Seek(0, 0) returns an error — typically only when the file descriptor is invalid/closed or the underlying filesystem does not support seeking (some FUSE/network mounts).","commonSituations":"Custom TMPDIR on a network/FUSE mount with partial seek support; exotic sandboxed environments restricting file operations; file descriptor exhaustion causing odd handle states.","solutions":["Point TMPDIR at a normal local filesystem (e.g. /tmp or $HOME/tmp).","Check available file descriptors (ulimit -n) if the system is under heavy load.","Retry the upgrade; this failure is usually environment-specific and transient.","Report if it persists — the file may be closed prematurely in a modified build."],"exampleFix":null,"handlingStrategy":"fallback","validationCode":null,"typeGuard":null,"tryCatchPattern":"if _, err := tempFile.Seek(0, io.SeekStart); err != nil {\n\tos.Remove(tempFile.Name())\n\treturn fmt.Errorf(\"failed to seek in temporary file: %w\", err) // or reopen the file fresh and retry\n}","preventionTips":["Use a local, seekable filesystem for TMPDIR (not network/FUSE mounts)","Avoid custom TMPDIR overrides in sandboxed environments","Recreate the temp file rather than reusing handles across steps"],"tags":["filesystem","io","go","seek"],"backgroundTag":"temp-file-io-failed","analyzedSha":"e2d772072efadbe41d2946d97d79be55532dbab5","analyzedAt":"2026-09-05T20:56:53.631Z","contentChangedAt":"2026-09-05T20:56:53.631Z","schemaVersion":2},"datasetVersion":"2026-09-12T22:17:10.623Z"}