zellij-org/zellij · error · anyhow::Error

failed to find pane with id

Error message

failed to find pane with id {pane_id:?}

What it means

Thrown by Tab::write_to_pane_id when the target pane_id is not found in any of the three stores it checks: floating_panes.get_mut, tiled_panes.get_pane_mut, or suppressed_panes. It means input was addressed to a pane that has already been closed, exited, or otherwise removed from all pane maps of this tab.

Solutions

1. If it happens once while a pane is exiting, treat it as benign: the input had no destination; re-focus another pane and continue.
2. For automation, re-resolve the pane id right before writing (re-read active pane / search results) instead of caching it across steps.
3. If it repeats steadily with visible panes, note whether the pane was a command pane closed with Ctrl-c (should_update_ui path) and report the layout + sequence upstream.
4. Update zellij; pane lifetime handling for sync-panes and suppressed panes sees regular fixes.

// re-resolve immediately before writing; do not cache pane ids
let Some(pane_id) = tab.get_active_pane_id(client_id) else {
    return Ok(());
};
tab.write_to_pane_id(key, bytes, kitty, pane_id, Some(client_id), None)

match tab.write_to_pane_id(key, bytes, kitty, pane_id, client_id, None) {
    Ok(update) => update,
    Err(e) if e.to_string().contains("failed to find pane with id") => {
        false // pane exited mid-flight; input has no destination
    },
    Err(e) => return Err(e),
}

When it happens

Trigger: Writing to a pane id that was resolved earlier but whose pane exited in between — e.g. keys held down while the pane's process exits, sync-panes broadcasting input to a set of panes where one closed, or a cached pane id (focus stored in a keybind/action) referencing a dead pane. Suppressed panes are still found via the third lookup, so the pane must be fully gone.

Common situations: Fast typing during command exit in a layout with command panes; sync-panes mode where panes exit at different times; automated zellij action scripts that store a pane id and use it after the pane closed.

Related errors

• Failed to find pane
• cannot acquire poisoned lock
• cannot acquire poisoned lock for
• Character key needs character data
• Failed to find active pane

AI-assisted analysis of zellij-org/zellij@474ea0cef6 (2026-08-19). Data as JSON: /api/errors/a46e4756e2dfdff5. Report an issue: GitHub.

Appendix: source

Thrown at zellij-server/src/tab/mod.rs:4461

        key_with_modifier: &Option<KeyWithModifier>,
        raw_input_bytes: Vec<u8>,
        raw_input_bytes_are_kitty: bool,
        pane_id: PaneId,
        client_id: Option<ClientId>,
        completion_tx: Option<NotificationEnd>,
    ) -> Result<bool> {
        // returns true if we need to update the UI (eg. when a command pane is closed with ctrl-c)
        let err_context = || format!("failed to write to pane with id {pane_id:?}");

        let mut should_update_ui = false;
        let is_sync_panes_active = self.is_sync_panes_active();

        let active_pane = self
            .floating_panes
            .get_mut(&pane_id)
            .or_else(|| self.tiled_panes.get_pane_mut(pane_id))
            .or_else(|| self.suppressed_panes.get_mut(&pane_id).map(|p| &mut p.1))
            .ok_or_else(|| anyhow!(format!("failed to find pane with id {pane_id:?}")))
            .with_context(err_context)?;

        // We always write for non-synced terminals.
        // However if the terminal is part of a tab-sync, we need to
        // check if the terminal should receive input or not (depending on its
        // 'exclude_from_sync' configuration).
        let should_not_write_to_terminal = is_sync_panes_active && active_pane.exclude_from_sync();

        if should_not_write_to_terminal {
            return Ok(should_update_ui);
        }

        match pane_id {
            PaneId::Terminal(active_terminal_id) => {
                match active_pane.adjust_input_to_terminal(
                    key_with_modifier,
                    raw_input_bytes,
                    raw_input_bytes_are_kitty,

View on GitHub (pinned to 474ea0cef6)