{"record":{"id":"11da6c15b2e7ab0c","repo":"xai-org/grok-build","slug":"bridge-spawn","errorCode":null,"errorMessage":"bridge spawn","messagePattern":"bridge spawn","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"crates/codegen/xai-grok-pager/src/app/leader_cluster/mod.rs","lineNumber":445,"sourceCode":"                LeaderClientCapabilities {\n                    client_version: Some(\"0.0.0-test\".to_string()),\n                    ..Default::default()\n                },\n                status_tx,\n            );\n            (Some(reconnector), Some(status_rx))\n        } else {\n            (None, None)\n        };\n\n        let bridge = bridge_channels(\n            leader_tx,\n            leader_rx,\n            cancel.clone(),\n            reconnector,\n            ReconnectPolicy::unbounded(),\n        )\n        .expect(\"bridge spawn\");\n        let tx = bridge.channel.tx;\n        let rx = bridge.channel.rx;\n\n        // Same handshake the pager performs after bridging (spawn path).\n        let _init: acp::InitializeResponse = bounded(\n            \"initialize\",\n            acp_send(\n                acp::InitializeRequest::new(acp::ProtocolVersion::V1)\n                    .client_capabilities(\n                        acp::ClientCapabilities::new()\n                            .fs(acp::FileSystemCapabilities::new())\n                            .terminal(false),\n                    )\n                    .meta(\n                        serde_json::json!({\n                            \"startupHints\": {\n                                \"nonInteractive\": true,\n                                \"skipGitStatus\": true,","sourceCodeStart":427,"sourceCodeEnd":463,"githubUrl":"https://github.com/xai-org/grok-build/blob/bc7f02eddd3d84085849dc19ed216f11c23b0571/crates/codegen/xai-grok-pager/src/app/leader_cluster/mod.rs#L427-L463","documentation":"Panic raised when spawning the ACP bridge in the leader-cluster client setup fails — the underlying spawn/connect call returned an Err and `.expect(\"bridge spawn\")` converts it into a panic. This means the pager could not establish the leader bridge channel (task spawn, handshake transport setup, or channel creation failed).","triggerScenarios":"`bridge(...)` returning Err during leader-mode client setup: spawn of the bridge task fails (runtime shutdown), the reconnect/policy wiring fails, or the transport setup between leader and follower fails immediately.","commonSituations":"Calling client setup outside a live tokio runtime; system resource exhaustion (can't spawn threads/tasks); the peer process for the bridge dying instantly so the spawn handshake fails; misconfigured leader address causing immediate connect error.","solutions":["Read the underlying Err from the panic payload — it names whether spawn or connect failed.","Ensure setup runs inside an active tokio runtime (not from a blocking context or after runtime shutdown).","Check the leader process/endpoint is alive and reachable before bridging.","Handle the error gracefully instead of expect: return a client-setup Result so leader mode can degrade."],"exampleFix":"// before\n.expect(\"bridge spawn\");\n// after\nlet bridge = bridge(...).map_err(|e| ClientError::BridgeSpawn(e.to_string()))?;","handlingStrategy":"try-catch","validationCode":"// ensure we're inside a tokio runtime before spawning the bridge\nassert!(tokio::runtime::Handle::try_current().is_ok(), \"bridge spawn requires a tokio runtime\");","typeGuard":null,"tryCatchPattern":"match bridge(...args) {\n    Ok(b) => b,\n    Err(e) => return Err(ClientError::BridgeSpawn(e.to_string())),\n}","preventionTips":["Always construct the client on a live tokio worker thread","Check leader endpoint reachability before spawning the bridge","Keep leader mode behind a feature flag so failures can disable it"],"tags":["rust","tokio","acp","panic","leader-cluster"],"backgroundTag":"bridge-spawn-failed","analyzedSha":"bc7f02eddd3d84085849dc19ed216f11c23b0571","analyzedAt":"2026-08-31T04:59:42.031Z","schemaVersion":2},"datasetVersion":"2026-08-31T09:17:48.483Z"}