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

ToggleNoUiFullscreenByPaneId missing pane_id

Error message

ToggleNoUiFullscreenByPaneId missing pane_id

What it means

ToggleNoUiFullscreenByPaneId toggles the no-UI (frameless) fullscreen mode of one specific pane; internally it maps to Action::ToggleFocusNoUiFullscreenByPaneId. The protobuf message ToggleNoUiFullscreenByPaneIdAction requires the optional pane_id field to be set. With pane_id = None the conversion fails with 'ToggleNoUiFullscreenByPaneId missing pane_id'.

Source

Thrown at zellij-utils/src/ipc/protobuf_conversion.rs:3039

                        .pane_id
                        .ok_or_else(|| anyhow!("EditScrollbackByPaneId missing pane_id"))?
                        .try_into()?,
                    ansi: a.ansi,
                })
            },
            ActionType::ToggleFullscreenByPaneId(a) => Ok(
                crate::input::actions::Action::ToggleFocusFullscreenByPaneId {
                    pane_id: a
                        .pane_id
                        .ok_or_else(|| anyhow!("ToggleFullscreenByPaneId missing pane_id"))?
                        .try_into()?,
                },
            ),
            ActionType::ToggleNoUiFullscreenByPaneId(a) => Ok(
                crate::input::actions::Action::ToggleFocusNoUiFullscreenByPaneId {
                    pane_id: a
                        .pane_id
                        .ok_or_else(|| anyhow!("ToggleNoUiFullscreenByPaneId missing pane_id"))?
                        .try_into()?,
                },
            ),
            ActionType::TogglePaneEmbedOrFloatingByPaneId(a) => Ok(
                crate::input::actions::Action::TogglePaneEmbedOrFloatingByPaneId {
                    pane_id: a
                        .pane_id
                        .ok_or_else(|| {
                            anyhow!("TogglePaneEmbedOrFloatingByPaneId missing pane_id")
                        })?
                        .try_into()?,
                },
            ),
            ActionType::CloseFocusByPaneId(a) => {
                Ok(crate::input::actions::Action::CloseFocusByPaneId {
                    pane_id: a
                        .pane_id
                        .ok_or_else(|| anyhow!("CloseFocusByPaneId missing pane_id"))?

View on GitHub (pinned to 98a0837077)

Solutions

  1. Set pane_id: Some(PaneId { pane_type: Some(PaneType::Terminal(id)) }).
  2. Use the focused-pane equivalent if you do not need to target a specific pane.
  3. Verify the pane exists before constructing the action.
  4. Rebuild all IPC participants from the same zellij source.

Example fix

// before
let action = ActionType::ToggleNoUiFullscreenByPaneId(
    ToggleNoUiFullscreenByPaneIdAction { pane_id: None },
); // -> "ToggleNoUiFullscreenByPaneId missing pane_id"

// after
let action = ActionType::ToggleNoUiFullscreenByPaneId(
    ToggleNoUiFullscreenByPaneIdAction {
        pane_id: Some(PaneId { pane_type: Some(PaneType::Plugin(2)) }),
    },
);
Defensive patterns

Strategy: validation

Validate before calling

fn is_sendable(a: &ToggleNoUiFullscreenByPaneIdAction) -> bool {
    a.pane_id
        .as_ref()
        .and_then(|p| p.pane_type.as_ref())
        .is_some()
}

Type guard

fn has_valid_pane_id(a: &ToggleNoUiFullscreenByPaneIdAction) -> bool {
    matches!(
        a.pane_id.as_ref().and_then(|p| p.pane_type.as_ref()),
        Some(pane_id::PaneType::Terminal(_)) | Some(pane_id::PaneType::Plugin(_))
    )
}

Try / catch

match Action::try_from(proto_action) {
    Ok(action) => dispatch(action),
    Err(e) if e.to_string().contains("ToggleNoUiFullscreenByPaneId missing pane_id") => {
        log::warn!("no-ui fullscreen toggle without pane target: {e}");
    },
    Err(e) => return Err(e),
}

Prevention

When it happens

Trigger: Sending ActionType::ToggleNoUiFullscreenByPaneId where ToggleNoUiFullscreenByPaneIdAction.pane_id is None.

Common situations: Plugins building fullscreen toggle actions without a resolved pane id; default prost construction; schema version skew between the tool sending the action and the zellij server decoding it.

Related errors

AI-assisted analysis of zellij-org/zellij@98a0837077 (2026-08-16). Data as JSON: /api/errors/83edfbaea511ada2. Report an issue: GitHub.