{"record":{"id":"461523e4e362b893","repo":"BoundaryML/baml","slug":"invalid-checksum-file-format","errorCode":null,"errorMessage":"Invalid checksum file format","messagePattern":"Invalid checksum file format","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"engine/playground-server/src/server.rs","lineNumber":274,"sourceCode":"        .header(\"User-Agent\", \"baml-playground-server\")\n        .send()\n        .await\n        .map_err(|e| anyhow::anyhow!(\"Failed to download checksum file: {e}\"))?;\n\n    if !checksum_resp.status().is_success() {\n        return Err(anyhow::anyhow!(\n            \"Checksum download failed with status: {}\",\n            checksum_resp.status()\n        ));\n    }\n\n    let checksum_text = checksum_resp.text().await?;\n\n    // Parse the expected checksum (format: \"hash filename\" or just \"hash\")\n    let expected_checksum = checksum_text\n        .split_whitespace()\n        .next()\n        .ok_or_else(|| anyhow::anyhow!(\"Invalid checksum file format\"))?\n        .to_lowercase();\n\n    // Calculate actual checksum\n    let mut hasher = Sha256::new();\n    hasher.update(file_bytes);\n    let actual_checksum = format!(\"{:x}\", hasher.finalize());\n\n    // Verify checksums match\n    if actual_checksum != expected_checksum {\n        return Err(anyhow::anyhow!(\n            \"SHA256 checksum verification failed. Expected: {}, Actual: {}\",\n            expected_checksum,\n            actual_checksum\n        ));\n    }\n\n    tracing::info!(\"SHA256 checksum verification passed\");\n    Ok(())","sourceCodeStart":256,"sourceCodeEnd":292,"githubUrl":"https://github.com/BoundaryML/baml/blob/bd85ce9dee1463ff04d27efd20531013a4ff46c1/engine/playground-server/src/server.rs#L256-L292","documentation":"After downloading the checksum file, verify_sha256_checksum parses it expecting the format \"hash filename\" or just \"hash\". If splitting on whitespace yields no tokens (empty body), it errors with \"Invalid checksum file format\".","triggerScenarios":"The checksum URL returns an empty body (or only whitespace), so checksum_text.split_whitespace().next() is None.","commonSituations":"Misconfigured release pipeline uploading a zero-byte .sha256 file; a URL that serves an HTML error page of whitespace-free... more commonly an empty 200 response from a misrouted endpoint; truncated upload.","solutions":["Inspect the checksum URL response body; regenerate and re-upload a valid '<sha256>  <filename>' file for the asset.","Confirm the checksum URL points at the checksum file, not a directory listing or empty object.","Re-run the release pipeline to republish the checksum asset."],"exampleFix":"// before (released file)\n(empty)\n// after\n9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08  web-panel-dist.tar.gz","handlingStrategy":"validation","validationCode":"body=$(curl -fsS \"$CHECKSUM_URL\"); echo \"$body\" | awk 'NF>=1 {print $1; exit}' | grep -Eq '^[0-9a-f]{64}$' && echo valid || echo invalid-checksum-file","typeGuard":null,"tryCatchPattern":"if let Err(e) = get_playground_dist().await {\n    if e.to_string().contains(\"Invalid checksum file format\") {\n        // alert: release metadata is broken, do not retry blindly\n    }\n}","preventionTips":["CI-validate checksum files match /^[0-9a-f]{64}(\\s+.*)?$/ before publishing.","Never upload empty checksum artifacts.","Point checksum URLs at the file itself, not a listing."],"tags":["parsing","rust","checksum","empty-file"],"backgroundTag":"invalid-argument-format","analyzedSha":"bd85ce9dee1463ff04d27efd20531013a4ff46c1","analyzedAt":"2026-09-12T03:38:25.718Z","contentChangedAt":"2026-09-12T03:38:25.718Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}