{"record":{"id":"ea852eb5b56477eb","repo":"xai-org/grok-build","slug":"spawn-blocking-panicked-e","errorCode":null,"errorMessage":"spawn_blocking panicked: {e}","messagePattern":"spawn_blocking panicked: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/codegen/xai-grok-shell/src/session/acp_session_impl/rewind.rs","lineNumber":361,"sourceCode":"            // survives; `None` keeps the existing marker (standard truncation).\n            let mut replay_compaction_marker: Option<Option<usize>> = None;\n\n            if needs_replay {\n                // Cross-compaction rewind: reconstruct conversation from updates.jsonl.\n                // Run on the blocking pool since replay does synchronous file I/O\n                // (reading checkpoint files + scanning updates.jsonl).\n                let replay_updates = updates_path.clone();\n                let replay_session_dir = session_dir.clone();\n                let replay_target = target_index;\n                let replay_result = tokio::task::spawn_blocking(move || {\n                    crate::session::helpers::replay::replay_to_prompt(\n                        &replay_updates,\n                        &replay_session_dir,\n                        replay_target,\n                    )\n                })\n                .await\n                .map_err(|e| anyhow::anyhow!(\"spawn_blocking panicked: {e}\"))?;\n                match replay_result {\n                    Ok(replay_result) => {\n                        tracing::info!(\n                            target_index,\n                            prompt_index_reached = replay_result.prompt_index_reached,\n                            conversation_len = replay_result.conversation.len(),\n                            \"Cross-compaction rewind: conversation reconstructed via replay\"\n                        );\n                        // The rebuilt conversation drops the summary unless a\n                        // checkpoint survived; carry the recomputed marker to\n                        // the snapshot restore so the stale value isn't reused.\n                        replay_compaction_marker = Some(replay_result.last_compaction_prompt_index);\n                        // The replay result may or may not include the session\n                        // preamble (System + User(user_info)):\n                        // - Checkpoint loaded (target >= compaction_at): the\n                        //   checkpoint's compacted_history already has System +\n                        //   User prefix. Use directly.\n                        // - Raw updates (target < compaction_at): replay only","sourceCodeStart":343,"sourceCodeEnd":379,"githubUrl":"https://github.com/xai-org/grok-build/blob/bc7f02eddd3d84085849dc19ed216f11c23b0571/crates/codegen/xai-grok-shell/src/session/acp_session_impl/rewind.rs#L343-L379","documentation":"Error \"spawn_blocking panicked: {e}\" thrown in xai-org/grok-build.","triggerScenarios":"Thrown at crates/codegen/xai-grok-shell/src/session/acp_session_impl/rewind.rs:361 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"bc7f02eddd3d84085849dc19ed216f11c23b0571","analyzedAt":"2026-08-31T04:59:42.031Z","schemaVersion":2},"datasetVersion":"2026-08-31T09:17:48.483Z"}