{"record":{"id":"a4e567a69bdac2e8","repo":"Hmbown/CodeWhale","slug":"inline-lane-cannot-be-stopped-safely-from-ano","errorCode":null,"errorMessage":"inline lane `{}` cannot be stopped safely from another process","messagePattern":"inline lane `(.+?)` cannot be stopped safely from another process","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/lane/src/runtime.rs","lineNumber":1064,"sourceCode":"    }\n\n    fn attach_command(&self, _record: &LaneRecord) -> Option<String> {\n        None\n    }\n\n    fn stop(\n        &self,\n        registry: &LaneRegistry,\n        record: &mut LaneRecord,\n        fence: Option<u64>,\n    ) -> Result<TerminalTransition> {\n        let transition = registry.mark_terminal_if_active_fenced(\n            record,\n            LaneStatus::Stopped,\n            fence,\n            |current| {\n                if current.status == LaneStatus::Running {\n                    bail!(\n                        \"inline lane `{}` cannot be stopped safely from another process\",\n                        current.id\n                    );\n                }\n                Ok(())\n            },\n        )?;\n        if transition.transitioned() {\n            self.cleanup_worktree(record)?;\n        }\n        Ok(transition)\n    }\n}\n\n/// Placeholder for remote VM / CI backends (surface only in Phase 1).\n#[derive(Debug)]\nstruct StubRuntime {\n    kind: RuntimeBackendKind,","sourceCodeStart":1046,"sourceCodeEnd":1082,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/0c42157ee52f9d55af2b506d71b46249910f77d3/crates/lane/src/runtime.rs#L1046-L1082","documentation":"InlineRuntime::stop refuses to stop a Running inline lane from another process. Inline lanes are child processes of the process that started them; only that parent can identify and reap them safely, so a cross-process stop (different PID, possibly different machine session) bails instead of risking a kill of the wrong process or an unreaped zombie. The guard runs inside the fenced Stopped transition, so no state changes on refusal.","triggerScenarios":"Calling stop on a Running inline lane from a process other than the one that called start — e.g. a second CLI invocation, a daemon restarted after a crash, or a monitoring tool trying to clean up lanes.","commonSituations":"Operator runs a cleanup command from another terminal while the TUI that owns the inline lane is still alive; a supervisor process restarted and trying to stop lanes spawned by its predecessor; scripts assuming all lane kinds are stoppable from anywhere (true for tmux, not inline).","solutions":["Stop the lane from the owning process (the session/TUI that started it)","If the owner is gone, terminate the child out-of-band (kill by PID) and let reconciliation move the lane to a terminal state","Use the tmux backend when lanes must be manageable from independent processes"],"exampleFix":null,"handlingStrategy":"validation","validationCode":"fn lane_stoppable_from_this_process(record: &LaneRecord) -> bool {\n    !(record.runtime_kind == RuntimeBackendKind::Inline && record.status == LaneStatus::Running)\n}\n\nif !lane_stoppable_from_this_process(&record) {\n    // route the stop to the owning process, or choose the tmux backend upfront\n}","typeGuard":"fn is_inline_running(record: &LaneRecord) -> bool {\n    record.runtime_kind == RuntimeBackendKind::Inline && record.status == LaneStatus::Running\n}","tryCatchPattern":null,"preventionTips":["Choose the tmux backend when lanes must be managed by separate processes (CLI, daemon)","Keep inline lanes under the lifetime of the process that started them and stop them there","For orphaned inline lanes, kill the child by PID and let reconciliation finalize status"],"tags":["rust","lane","inline","stop","process-ownership"],"backgroundTag":"cross-process-unsupported","analyzedSha":"0c42157ee52f9d55af2b506d71b46249910f77d3","analyzedAt":"2026-08-20T21:50:45.477Z","schemaVersion":2},"datasetVersion":"2026-08-21T23:17:16.201Z"}