{"record":{"id":"3e2ecfaf4e886a2d","repo":"xai-org/grok-build","slug":"error-3e2ecf","errorCode":null,"errorMessage":"{}","messagePattern":"\\{\\}","errorType":"exception","errorClass":"io::Error","httpStatus":null,"severity":"error","filePath":"crates/codegen/xai-grok-workspace/src/permission/state.rs","lineNumber":377,"sourceCode":"        let sig = self.current_sig().await;\n        if sig == self.last_sig {\n            return None;\n        }\n        self.last_sig = sig;\n        Some(self.read().await)\n    }\n}\n\nasync fn persist_state_to_path_with_writer<F>(\n    path: &std::path::Path,\n    state: &PermissionState,\n    writer: F,\n) -> std::io::Result<()>\nwhere\n    F: FnOnce(&std::path::Path, &str) -> std::io::Result<()> + Send + 'static,\n{\n    let contents = toml::to_string_pretty(state)\n        .map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e))?;\n    let path = path.to_path_buf();\n    tokio::task::spawn_blocking(move || writer(&path, &contents))\n        .await\n        .map_err(std::io::Error::other)?\n}\n\nasync fn persist_state_to_dir(\n    dir: &std::path::Path,\n    state: &PermissionState,\n    client_identifier: Option<&str>,\n) {\n    let path = state_file_path(dir, client_identifier);\n    let dir = dir.to_path_buf();\n    // Owner-only dir creation rides the writer's spawn_blocking: GROK_HOME may\n    // sit on a slow filesystem, so no blocking fs work on the async worker.\n    let result = persist_state_to_path_with_writer(&path, state, move |path, contents| {\n        xai_grok_config::create_dir_all_owner_only(&dir)?;\n        xai_grok_config::fs_atomic::write_atomically(path, contents, None)","sourceCodeStart":359,"sourceCodeEnd":395,"githubUrl":"https://github.com/xai-org/grok-build/blob/bc7f02eddd3d84085849dc19ed216f11c23b0571/crates/codegen/xai-grok-workspace/src/permission/state.rs#L359-L395","documentation":"persist_state_to_path_with_writer serializes the permission state with toml::to_string_pretty, then spawns a blocking task to run the caller-supplied writer. Two failure modes surface as the message '{}' (the Display of the inner error): a TOML serialization failure wrapped as InvalidData with the toml error text, or the blocking writer/spawn_blocking join failing, converted via std::io::Error::other. The '{}' is just the inner error's message. This is called from try_load_state_with_writer and persist_state_to_dir.","triggerScenarios":"Calling persist_state_to_path_with_writer (directly or via persist_state_to_dir / try_load_state_with_writer) when (a) the permission state contains data TOML cannot serialize (e.g. map keys that aren't string-like, unsupported types), or (b) the writer closure fails writing to its target (bad path, permissions, disk full), or (c) the blocking task panics or the runtime is shutting down.","commonSituations":"Custom writer closures pointing at read-only or nonexistent directories; state containing non-string keys or exotic types added to the permission model; calling persist during runtime shutdown so spawn_blocking join fails; toml serialization of state loaded from an older format.","solutions":["Read the inner '{}' message in the error to identify whether it's a toml error or a writer I/O error.","Fix the writer closure: ensure its target directory exists and is writable before persisting.","Ensure the tokio runtime is alive when persisting and the state type contains no non-serializable fields/keys.","Convert problematic map keys to strings in the state model so toml::to_string_pretty succeeds.","If panics in the writer are possible, wrap writer internals and return Err instead of panicking."],"exampleFix":"// before\nlet path = PathBuf::from(\"/var/lib/state/permissions.toml\"); // dir may not exist\npersist_state_to_path_with_writer(&state, &path, write_fn).await?;\n// after\nstd::fs::create_dir_all(\"/var/lib/state\")?;\npersist_state_to_path_with_writer(&state, &path, write_fn).await\n    .map_err(|e| eprintln!(\"persist failed: {e}\"))?;","handlingStrategy":"try-catch","validationCode":"fn can_persist(state: &PermissionState, path: &std::path::Path) -> Result<(), String> {\n    toml::to_string_pretty(state).map(|_| ()).map_err(|e| e.to_string())?;\n    if let Some(p) = path.parent() {\n        if !p.exists() { return Err(format!(\"dir missing: {}\", p.display())); }\n    }\n    Ok(())\n}","typeGuard":null,"tryCatchPattern":"match persist_state_to_path_with_writer(&state, &path, writer).await {\n    Ok(()) => {}\n    Err(e) => {\n        // e displays as the inner toml/writer error ('{}')\n        log::error!(\"state persist failed: {e}\");\n        // fall back to in-memory state or a backup location\n        persist_to_backup(&state)?;\n    }\n}","preventionTips":["Create the target directory before persisting","Keep the state model TOML-serializable (string keys, simple types)","Ensure the tokio runtime outlives the persist call; avoid persisting during shutdown","Log the full error chain — the message is the inner error's Display"],"tags":["toml","serialization","async","tokio","persistence"],"backgroundTag":"serialization-failed","analyzedSha":"bc7f02eddd3d84085849dc19ed216f11c23b0571","analyzedAt":"2026-08-31T04:59:42.031Z","schemaVersion":2},"datasetVersion":"2026-08-31T09:17:48.483Z"}