{"record":{"id":"43490a4f0baec2b8","repo":"GitoxideLabs/gitoxide","slug":"rebase-worker-panicked","errorCode":null,"errorMessage":"rebase worker panicked","messagePattern":"rebase worker panicked","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"gix-tix/src/lib.rs","lineNumber":5867,"sourceCode":"                Some(RebaseWorkerEvent::Progress(progress)) => latest = Some(progress),\n                Some(RebaseWorkerEvent::Complete(result)) => break result,\n                None => {}\n            }\n            let now = Instant::now();\n            if todo_progress_visible(now.duration_since(started))\n                && latest != rendered\n                && now.duration_since(last_draw) >= FRAME_INTERVAL\n            {\n                let progress = latest.expect(\"a changed progress snapshot is available\");\n                if let Err(err) = terminal.draw(|frame| ui::draw_todo_progress(frame, progress)) {\n                    break Err(err).context(\"could not draw rebase progress\");\n                }\n                rendered = latest;\n                last_draw = now;\n            }\n        };\n        if worker.join().is_err() {\n            return Err(anyhow::anyhow!(\"rebase worker panicked\"));\n        }\n        result\n    })\n}\n\nfn todo_progress_visible(elapsed: Duration) -> bool {\n    elapsed >= TODO_PROGRESS_DELAY\n}\n\n#[derive(Clone, Copy)]\nenum CreateMode {\n    Insert,\n    InsertEmpty,\n    Fork,\n}\n\n#[tracing::instrument(skip_all, fields(parent = ?parent, fork = matches!(mode, CreateMode::Fork)))]\nfn create_commit(","sourceCodeStart":5849,"sourceCodeEnd":5885,"githubUrl":"https://github.com/GitoxideLabs/gitoxide/blob/e73179060badf27222d790981fac3f84c1830a7e/gix-tix/src/lib.rs#L5849-L5885","documentation":"After the rebase driver loop finishes, the worker thread's `JoinHandle::join()` is checked; a join error means the worker thread panicked rather than returned normally. The panic itself is discarded, so only this generic message is reported to the user.","triggerScenarios":"The closure passed to the rebase worker thread panicked (e.g. `unwrap()`/index-out-of-bounds inside rebase execution) and `worker.join()` returned `Err` at gix-tix/src/lib.rs:5867.","commonSituations":"A panic in gix internals triggered by an unusual repository state (corrupt object, bad todo line); a bug such as an out-of-range index while rendering/processing todos; an `expect()` firing in the worker.","solutions":["Capture the panic payload: `match worker.join() { Err(p) => report {:?} of p, ... }` so the real panic message is shown instead of a generic one.","Run the operation with `RUST_BACKTRACE=1` and reproduce to find the panicking call site in the worker closure.","Replace `unwrap()`/`expect()` in the worker closure with error propagation via the `Complete(Err(...))` event.","Check the repository state (corrupt objects, malformed rebase todo) that may trigger the panic path."],"exampleFix":"// before\nif worker.join().is_err() {\n    return Err(anyhow::anyhow!(\"rebase worker panicked\"));\n}\n// after\nif let Err(panic) = worker.join() {\n    return Err(anyhow::anyhow!(\"rebase worker panicked: {panic:?}\"));\n}","handlingStrategy":"try-catch","validationCode":"// Cannot validate ahead of time; enable panic capture in the worker closure:\nlet worker = thread::spawn(move || std::panic::catch_unwind(AssertUnwindSafe(worker_body)));","typeGuard":"fn worker_panicked(join: &Result<(), Box<dyn Any + Send>>) -> bool {\n    join.is_err()\n}","tryCatchPattern":"match worker.join() {\n    Err(panic) => Err(anyhow::anyhow!(\"rebase worker panicked: {panic:?}\")),\n    Ok(Err(e)) => Err(e),\n    Ok(Ok(v)) => Ok(v),\n}","preventionTips":["Never `unwrap()` inside the worker closure; propagate errors via the Complete event","Run with `RUST_BACKTRACE=1` during development to localize panics","Validate repository state (objects, todo script) before spawning the worker","Fuzz worker input with unusual repo states in CI"],"tags":["rebase","panic","worker-thread","join"],"backgroundTag":"worker-thread-panic","analyzedSha":"e73179060badf27222d790981fac3f84c1830a7e","analyzedAt":"2026-09-08T11:26:50.865Z","contentChangedAt":"2026-09-08T11:26:50.865Z","schemaVersion":2},"datasetVersion":"2026-09-15T23:17:13.987Z"}