{"record":{"id":"99616e3312abd72f","repo":"BoundaryML/baml","slug":"failed-to-load-cargo-metadata-e","errorCode":null,"errorMessage":"Failed to load cargo metadata: {e}","messagePattern":"Failed to load cargo metadata: (.+?)","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"baml_language/crates/tools_stow/src/main.rs","lineNumber":608,"sourceCode":"fn find_crate_dirs(crates_dir: &Path) -> Vec<PathBuf> {\n    let mut dirs = Vec::new();\n    if let Ok(entries) = std::fs::read_dir(crates_dir) {\n        for entry in entries.flatten() {\n            let path = entry.path();\n            if path.is_dir() && path.join(\"Cargo.toml\").exists() {\n                dirs.push(path);\n            }\n        }\n    }\n    dirs.sort();\n    dirs\n}\n\nfn load_metadata(manifest_path: &Path) -> cargo_metadata::Metadata {\n    MetadataCommand::new()\n        .manifest_path(manifest_path)\n        .exec()\n        .unwrap_or_else(|e| panic!(\"Failed to load cargo metadata: {e}\"))\n}\n\nfn toml_array_strings(value: Option<&toml::Value>) -> Vec<String> {\n    value\n        .and_then(|v| v.as_array())\n        .map(|arr| {\n            arr.iter()\n                .filter_map(|v| v.as_str().map(std::string::ToString::to_string))\n                .collect::<Vec<String>>()\n        })\n        .unwrap_or_default()\n}\n\nfn derive_member_roots(workspace_root: &Path, members: &[String]) -> Vec<PathBuf> {\n    let mut roots = Vec::new();\n    let mut seen = HashSet::new();\n\n    for member in members {","sourceCodeStart":590,"sourceCodeEnd":626,"githubUrl":"https://github.com/BoundaryML/baml/blob/bd85ce9dee1463ff04d27efd20531013a4ff46c1/baml_language/crates/tools_stow/src/main.rs#L590-L626","documentation":"load_metadata runs cargo_metadata's MetadataCommand for the selected manifest and panics if cargo metadata execution fails, with the underlying cargo_metadata error embedded in the message. The tool treats resolvable workspace metadata as a hard precondition for all subsequent stow operations.","triggerScenarios":"main() calls load_metadata with the chosen manifest path; MetadataCommand::exec() returns Err when cargo metadata cannot run or the manifest cannot be resolved.","commonSituations":"Running stow outside a valid cargo workspace; corrupt Cargo.toml/lockfile; incompatible rustup toolchain; virtual manifest requiring features the resolver rejects; PATH without cargo in the CI environment.","solutions":["Run `cargo metadata --manifest-path <path>` manually to surface the real cargo error and fix it.","Confirm you are invoking stow from inside the intended cargo workspace.","Ensure a working cargo toolchain is on PATH (rustup default stable; rustup update).","If a dependency resolution issue, update the lockfile (cargo update) or fix the dependency spec."],"exampleFix":"// before: stow fails in CI with no cargo\\n- run: cargo run -p tools_stow -- stow\\n// after: install toolchain first\\n- run: dtolnay/rust-toolchain@stable\\n- run: cargo run -p tools_stow -- stow","handlingStrategy":"try-catch","validationCode":"let out = std::process::Command::new(\"cargo\")\\n    .args([\"metadata\",\"--manifest-path\",manifest_path.to_str().unwrap()])\\n    .output()?;\\nif !out.status.success() { panic!(\"workspace metadata unresolvable before running stow\"); }","typeGuard":null,"tryCatchPattern":"match MetadataCommand::new().manifest_path(manifest_path).exec() {\\n    Ok(m) => m,\\n    Err(e) => { eprintln!(\"Failed to load cargo metadata: {e}\"); std::process::exit(1); }\\n}","preventionTips":["Run from inside a valid cargo workspace.","Install a working toolchain before invoking stow in CI.","Fix dependency resolution errors (cargo update) before tooling.","Validate manifests parse before running automation."],"tags":["rust","cargo","metadata"],"backgroundTag":"api-request-failed","analyzedSha":"bd85ce9dee1463ff04d27efd20531013a4ff46c1","analyzedAt":"2026-09-12T03:38:25.718Z","contentChangedAt":"2026-09-12T03:38:25.718Z","schemaVersion":2},"datasetVersion":"2026-09-14T11:17:12.474Z"}