Hmbown/CodeWhale · error · anyhow::Error

handing delegated coordination between engines in this proce

Error message

handing delegated coordination between engines in this process for {}: {error}

What it means

Same-process handover branch of the delegated coordination lock: the background thread that tried to acquire the lock failed, the ready channel returned an error string, and the lock file's recorded pid equals the current process id. The COORDINATION_SAME_PROCESS_HANDOVER sentinel marks a re-entrant acquisition being handed between engines inside one process for the given state_root.

Source

Thrown at crates/tui/src/tools/subagent/mod.rs:3174

                    let _ = release_rx.recv();
                }
                Err(error) => {
                    let _ = ready_tx.send(Err(error.to_string()));
                }
            }
        });
        match ready_rx.recv_timeout(Duration::from_secs(5)) {
            Ok(Ok(())) => Ok(Self {
                release: Some(release_tx),
                thread: Some(thread),
            }),
            Ok(Err(error)) => {
                let _ = thread.join();
                let holder_pid = std::fs::read_to_string(&lock_path)
                    .ok()
                    .and_then(|contents| contents.trim().parse::<u32>().ok());
                if holder_pid == Some(std::process::id()) {
                    Err(anyhow!(
                        "{COORDINATION_SAME_PROCESS_HANDOVER} for {}: {error}",
                        state_root.display()
                    ))
                } else {
                    Err(anyhow!(
                        "another Codewhale process{} owns delegated coordination for {}: {error}",
                        holder_pid
                            .map(|pid| format!(" (pid {pid})"))
                            .unwrap_or_default(),
                        state_root.display()
                    ))
                }
            }
            Err(error) => {
                drop(release_tx);
                let _ = thread.join();
                Err(anyhow!(
                    "{COORDINATION_LOCK_TIMEOUT_MARKER} for {}: {error}",

View on GitHub (pinned to 0c42157ee5)

Solutions

1. Verify the earlier engine in this process released its coordination lease (check the release channel path)
2. Ensure only one engine at a time holds delegated coordination for the state_root
3. Restart the process if a stale same-process lock file (with this pid) remains

When it happens

Trigger: Thrown at crates/tui/src/tools/subagent/mod.rs:3174 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Hmbown/CodeWhale@0c42157ee5 (2026-08-20). Data as JSON: /api/errors/9ae359cb1b38e320. Report an issue: GitHub.