{"record":{"id":"589f2801d365c3b3","repo":"zellij-org/zellij","slug":"failed-to-find-pane-at-position","errorCode":null,"errorMessage":"Failed to find pane at position","messagePattern":"Failed to find pane at position","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"warning","filePath":"zellij-server/src/tab/mouse_handler.rs","lineNumber":1089,"sourceCode":"        } else {\n            Ok(MouseEffect::default())\n        }\n    }\n\n    fn execute_stop_moving_floating_pane(\n        tab: &mut Tab,\n        position: Position,\n        client_id: ClientId,\n    ) -> Result<MouseEffect> {\n        let err_context = || \"failed to stop moving floating pane\";\n        let never_moved = tab.floating_panes.stop_moving_pane_with_mouse(position);\n        if never_moved {\n            let active_pane_id = tab\n                .get_active_pane_id(client_id)\n                .ok_or_else(|| anyhow!(\"Failed to find active pane\"))?;\n            let pane_id_at_position = Self::get_pane_at(tab, &position, false)\n                .with_context(err_context)?\n                .ok_or_else(|| anyhow!(\"Failed to find pane at position\"))?\n                .pid();\n            if active_pane_id != pane_id_at_position {\n                Self::focus_pane_at(tab, &position, client_id).with_context(err_context)?;\n            }\n        }\n        Ok(MouseEffect::default())\n    }\n\n    fn execute_focus_on_hover(\n        tab: &mut Tab,\n        pane_id: PaneId,\n        position: Position,\n        client_id: ClientId,\n    ) -> Result<MouseEffect> {\n        let err_context = || format!(\"failed to focus pane on hover for client {client_id}\");\n\n        let is_selectable = tab\n            .get_pane_with_id(pane_id)","sourceCodeStart":1071,"sourceCodeEnd":1107,"githubUrl":"https://github.com/zellij-org/zellij/blob/98a0837077492d53dd252ab30bc3e43e41e504f4/zellij-server/src/tab/mouse_handler.rs#L1071-L1107","documentation":"Returned in execute_stop_moving_floating_pane when get_pane_at finds no pane (tiled or floating, non-selectable included per the false flag) at the position where the mouse button was released. After a drag that never moved a pane, the handler tries to focus the pane under the cursor and there is none, so it errors.","triggerScenarios":"Mouse-up over an area of the tab that contains no pane - the empty background of the tiled area, gaps between floating panes, or the tab's dead space - at the end of a would-be floating-pane drag.","commonSituations":"Releasing a click in the gap between panes or on the background; releasing outside all floating panes after toggling the floating layer; releases at coordinates invalidated by a concurrent resize/layout change; high-DPI/scroll-offset mismatches mapping the release position outside all panes.","solutions":["Release the drag over an actual pane, or simply click directly on the target pane afterward","If it happens constantly at valid coordinates, check for layout/resize races or stale geometry - resize the window once to force a relayout","Upgrade zellij; position-resolution fixes around floating panes land regularly","For embedders injecting mouse events, verify positions are in viewport coordinates expected by the tab"],"exampleFix":"// before\nlet pane_id_at_position = Self::get_pane_at(tab, &position, false)\n    .with_context(err_context)?\n    .ok_or_else(|| anyhow!(\"Failed to find pane at position\"))?\n    .pid();\n\n// after: release over empty space is a no-op, not an error\nlet pane_id_at_position = match Self::get_pane_at(tab, &position, false)\n    .with_context(err_context)?\n{\n    Some(pane) => pane.pid(),\n    None => return Ok(MouseEffect::default()),\n};","handlingStrategy":"fallback","validationCode":"// treat release over empty space as an acceptable no-op\nmatch Self::get_pane_at(tab, &position, false)? {\n    Some(pane) => { let pid = pane.pid(); /* compare and focus */ },\n    None => return Ok(MouseEffect::default()),\n}","typeGuard":"fn position_hits_pane(tab: &Tab, position: &Position) -> bool {\n    // public approximation: tab.hit_pane(position).is_some()\n    tab.get_pane_at(position).is_some()\n}","tryCatchPattern":"// hit-testing misses are expected; never fail the whole mouse pipeline for them\nlet effect = match tab.handle_mouse_event(&event, client_id) {\n    Ok(effect) => effect,\n    Err(e) => { log::debug!(\"mouse release over empty area ignored: {e:#}\"); MouseEffect::default() },\n};","preventionTips":["Release drags over a pane, not over background gaps","When injecting mouse events programmatically, clamp positions to known pane geometry","Force a relayout (window resize) if stale geometry seems to cause phantom empty-space releases"],"tags":["rust","zellij","mouse","floating-panes","hit-testing"],"backgroundTag":null,"analyzedSha":"98a0837077492d53dd252ab30bc3e43e41e504f4","analyzedAt":"2026-08-16T13:02:01.396Z","schemaVersion":2},"datasetVersion":"2026-08-16T13:17:31.715Z"}