{"record":{"id":"6709f02018c180bc","repo":"rust-lang/cargo","slug":"failed-to-find-a-workspace-root","errorCode":null,"errorMessage":"failed to find a workspace root","messagePattern":"failed to find a workspace root","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"src/workspace/parser/mod.rs","lineNumber":1002,"sourceCode":"    workspace_config: &WorkspaceConfig,\n) -> CargoResult<InheritableFields> {\n    match workspace_config {\n        WorkspaceConfig::Root(root) => Ok(root.inheritable().clone()),\n        WorkspaceConfig::Member {\n            root: Some(path_to_root),\n        } => {\n            let path = normalized_path\n                .parent()\n                .unwrap()\n                .join(path_to_root)\n                .join(\"Cargo.toml\");\n            let root_path = paths::normalize_path(&path);\n            inheritable_from_path(gctx, root_path)\n        }\n        WorkspaceConfig::Member { root: None } => {\n            match find_workspace_root(&normalized_path, gctx)? {\n                Some(path_to_root) => inheritable_from_path(gctx, path_to_root),\n                None => Err(anyhow!(\"failed to find a workspace root\")),\n            }\n        }\n    }\n}\n\nfn inheritable_from_path(\n    gctx: &GlobalContext,\n    workspace_path: PathBuf,\n) -> CargoResult<InheritableFields> {\n    // Workspace path should have Cargo.toml at the end\n    let workspace_path_root = workspace_path.parent().unwrap();\n\n    // Let the borrow exit scope so that it can be picked up if there is a need to\n    // read a manifest\n    if let Some(ws_root) = gctx.ws_roots().get(workspace_path_root) {\n        return Ok(ws_root.inheritable().clone());\n    };\n","sourceCodeStart":984,"sourceCodeEnd":1020,"githubUrl":"https://github.com/rust-lang/cargo/blob/98a09e7e7d62850f14e5b6132101fc1edd19a16f/src/workspace/parser/mod.rs#L984-L1020","documentation":"Thrown during inheritable-field resolution when a workspace member has no explicit root path (WorkspaceConfig::Member { root: None }) and the filesystem walk via find_workspace_root failed to locate an ancestor Cargo.toml containing a [workspace] section. The member expected to inherit fields from a workspace root but none could be found, so inheritance cannot proceed.","triggerScenarios":"A crate declares itself a workspace member (or inherits workspace fields) but is not located under any directory containing a [workspace] Cargo.toml. find_workspace_root walks up from the member's normalized path and returns None, so inheritable_from_path is never called.","commonSituations":"A crate is moved out of its workspace without updating its manifest. A [workspace] members glob does not cover the crate's directory, yet the crate references workspace.package.* fields. Running cargo from a vendored/copied tree missing the workspace root. A member's Cargo.toml has workspace-inherited fields but no [workspace] ancestor exists.","solutions":["Ensure an ancestor directory contains a Cargo.toml with a [workspace] table that lists (or globs) this crate in its members.","If the crate is standalone, remove all workspace-inherited fields (workspace = true, workspace.package.* references).","Run cargo from the workspace root, or fix the member's relative root path if it uses WorkspaceConfig::Member { root: Some(..) }.","Verify the directory structure: the member must be nested inside the workspace root."],"exampleFix":"# before: member Cargo.toml references workspace inheritance\n[package]\nversion.workspace = true\n# but no ancestor has [workspace]\n\n# after: add a workspace root Cargo.toml above this crate\n# root Cargo.toml:\n[workspace]\nmembers = [\"member-crate\"]\n\n[workspace.package]\nversion = \"0.1.0\"","handlingStrategy":"validation","validationCode":"fn ensure_workspace_root_accessible(member_path: &Path) -> Result<PathBuf, String> {\n    let mut dir = member_path.parent().ok_or(\"no parent\")?;\n    loop {\n        let cargo_toml = dir.join(\"Cargo.toml\");\n        if cargo_toml.is_file() {\n            if let Ok(contents) = std::fs::read_to_string(&cargo_toml) {\n                if contents.contains(\"[workspace]\") {\n                    return Ok(cargo_toml);\n                }\n            }\n        }\n        dir = dir.parent().ok_or(\"no workspace root found above this member\")?;\n    }\n}","typeGuard":"fn has_workspace_root_above(path: &Path) -> bool {\n    let mut dir = path.parent();\n    while let Some(d) = dir {\n        let f = d.join(\"Cargo.toml\");\n        if f.is_file() {\n            if let Ok(c) = std::fs::read_to_string(&f) {\n                if c.contains(\"[workspace]\") { return true; }\n            }\n        }\n        dir = d.parent();\n    }\n    false\n}","tryCatchPattern":null,"preventionTips":["Ensure workspace members are nested inside a directory with a [workspace] Cargo.toml.","Add the member path to [workspace].members or [workspace].members.exclude globs.","Run cargo commands from the workspace root."],"tags":["cargo","workspace","inheritance","filesystem","parser"],"backgroundTag":null,"analyzedSha":"98a09e7e7d62850f14e5b6132101fc1edd19a16f","analyzedAt":"2026-08-11T17:42:36.556Z","contentChangedAt":"2026-08-11T17:42:36.556Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}