{"record":{"id":"303f2ddd1f97fd9e","repo":"zellij-org/zellij","slug":"failed-to-find-active-pane","errorCode":null,"errorMessage":"Failed to find active pane","messagePattern":"Failed to find active pane","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"zellij-server/src/tab/mouse_handler.rs","lineNumber":912,"sourceCode":"            MouseAction::NoAction => Ok(MouseEffect::default()),\n        }\n    }\n\n    fn execute_stop_resize(\n        tab: &mut Tab,\n        position: Position,\n        client_id: ClientId,\n    ) -> Result<MouseEffect> {\n        let err_context = || \"failed to stop resize\";\n        let never_resized = Self::stop_pane_resize_with_mouse(tab, position, client_id)\n            .with_context(err_context)?;\n        if never_resized {\n            let pane_id_at_position = Self::get_pane_at(tab, &position, false)\n                .with_context(err_context)?\n                .map(|p| p.pid());\n            let active_pane_id = tab\n                .get_active_pane_id(client_id)\n                .ok_or_else(|| anyhow!(\"Failed to find active pane\"))?;\n            if let Some(pane_id) = pane_id_at_position {\n                if pane_id != active_pane_id {\n                    Self::focus_pane_at(tab, &position, client_id).with_context(err_context)?;\n                }\n            }\n        }\n        Ok(MouseEffect::state_changed())\n    }\n\n    fn execute_focus_pane(\n        tab: &mut Tab,\n        position: Position,\n        client_id: ClientId,\n    ) -> Result<MouseEffect> {\n        let err_context = || \"failed to focus pane\";\n        clear_hover_for_client(tab, client_id);\n        let active_pane_id_before = tab\n            .get_active_pane_id(client_id)","sourceCodeStart":894,"sourceCodeEnd":930,"githubUrl":"https://github.com/zellij-org/zellij/blob/bf8d23a4f774abf27a108da2a1a2689e7d8d0d23/zellij-server/src/tab/mouse_handler.rs#L894-L930","documentation":"Thrown in handle_mouse_release (mouse_handler.rs) when, after stopping a possible resize, tab.get_active_pane_id(client_id) returns None — the releasing client has no active pane. get_active_pane_id checks only the floating map when floats are visible, otherwise only the tiled map, so a visible-but-unfocused floating overlay or an emptied tab yields None.","triggerScenarios":"Mouse button released while no pane is active for the client: the last pane exited while the button was held, or floating panes are visible with no floating pane focused for that client at release time.","commonSituations":"Holding a mouse button while a command pane exits; releasing after the focused floating pane was closed mid-press; reconnecting client whose focus was not yet restored.","solutions":["If the tab was empty at release, the error is expected — no click routing is possible; open or focus a pane and retry.","If floats are visible, focus one float (click on it after re-showing) so get_active_pane_id consults a populated focus slot.","If panes are visibly focused and it still errors, capture client_id and mouse sequence and report upstream as a focus-tracking bug.","Update zellij."],"exampleFix":null,"handlingStrategy":"validation","validationCode":"// guard mouse-release handling on focus existing\nlet Some(active_pane_id) = tab.get_active_pane_id(client_id) else {\n    return Ok(MouseEffect::default()); // nothing focused: ignore the release\n};","typeGuard":null,"tryCatchPattern":"match Self::handle_mouse_release(tab, position, client_id) {\n    Ok(effect) => effect,\n    Err(e) if e.to_string().ends_with(\"Failed to find active pane\") => MouseEffect::default(),\n    Err(e) => return Err(e),\n}","preventionTips":["Ensure focus is (re)populated whenever the last pane of a tab closes, including command panes.","For floating overlays, always keep one float focused so the floating-map lookup succeeds.","Ignore mouse release when no pane is focused rather than propagating an error."],"tags":["zellij","rust","mouse","active-pane","race-condition"],"backgroundTag":"missing-active-pane","analyzedSha":"bf8d23a4f774abf27a108da2a1a2689e7d8d0d23","analyzedAt":"2026-08-19T07:42:58.758Z","contentChangedAt":"2026-08-19T07:42:58.758Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}