{"record":{"id":"36de7baadda84f9c","repo":"Hmbown/CodeWhale","slug":"ninth-deferred-child-tool","errorCode":null,"errorMessage":"ninth deferred child tool","messagePattern":"ninth deferred child tool","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/tui/src/tools/subagent/tests.rs","lineNumber":8115,"sourceCode":"\n#[tokio::test]\nasync fn small_surface_successful_cached_use_touches_lru() {\n    let registry = small_surface_registry(FleetRole::Builder);\n    let mut catalog = registry.deferred_catalog_for_model(&FleetRole::Builder);\n    // Exercise the LRU with a deliberately deferred read-only fixture tool;\n    // production goal controls are eager and must not consume cache slots.\n    catalog\n        .iter_mut()\n        .find(|tool| tool.name == \"get_goal\")\n        .expect(\"goal read fixture\")\n        .defer_loading = Some(true);\n    let mut others = catalog\n        .iter()\n        .filter(|tool| tool.defer_loading == Some(true) && tool.name != \"get_goal\")\n        .map(|tool| tool.name.clone());\n    let mut warm = vec![\"get_goal\".to_string()];\n    warm.extend(others.by_ref().take(7));\n    let ninth = others.next().expect(\"ninth deferred child tool\");\n    let mut surface = SubAgentToolSurface::new(catalog, &warm);\n    model_request_tools(&mut surface);\n    execute_surface_tool(&registry, &mut surface, \"get_goal\", json!({}))\n        .await\n        .expect(\"cached read tool executes\");\n    surface.hydrate(&ninth).expect(\"ninth activation\");\n    assert!(model_tool_names(model_request_tools(&mut surface)).contains(\"get_goal\"));\n}\n\n#[test]\nfn small_surface_depth_cap_removes_only_agent() {\n    let mut runtime =\n        stub_runtime().with_agent_tool_surface_options(enabled_agent_surface_options());\n    runtime.worker_profile = WorkerRuntimeProfile::for_role(FleetRole::Builder);\n    runtime.spawn_depth = runtime.max_spawn_depth;\n    let registry = SubAgentToolRegistry::new(\n        runtime,\n        FleetRole::Builder,","sourceCodeStart":8097,"sourceCodeEnd":8133,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/73e0f67d83c59909b571efdfc88c4bc28c309cb1/crates/tui/src/tools/subagent/tests.rs#L8097-L8133","documentation":"A `.expect(\"ninth deferred child tool\")` panic on Option: others.next() returned None, meaning the catalog contained fewer than nine deferred tools (one get_goal fixture plus the deferred set). The LRU cap test needs at least 9 deferred child tools; the catalog only supplied 8 or fewer.","triggerScenarios":"After reserving \"get_goal\" and taking 7 others (warm.extend(others.by_ref().take(7))), the next others.next() at crates/tui/src/tools/subagent/tests.rs:8115 finds no ninth tool with defer_loading == Some(true) and name != \"get_goal\".","commonSituations":"A catalog change reduced the number of deferable child tools below nine; a tool's defer_loading default flipped to false; synthetic deferred fixtures were removed or renamed so they no longer carry defer_loading = Some(true).","solutions":["Count the deferred entries in the Builder catalog to see how many exist and which are missing.","Add another synthetic_deferred_tool fixture so at least nine deferred tools exist, or lower the test's expectation to the new cap.","Check whether defer_loading defaults changed so formerly deferred tools are now eager.","Confirm the filter (defer_loading == Some(true) && name != \"get_goal\") matches the intended fixture set."],"exampleFix":null,"handlingStrategy":"validation","validationCode":"let deferred: Vec<&Tool> = catalog.iter().filter(|t| t.defer_loading == Some(true) && t.name != \"get_goal\").collect();\nassert!(deferred.len() >= 8, \"need 8+ deferred tools beyond get_goal, found {}\", deferred.len());","typeGuard":null,"tryCatchPattern":"let Some(ninth) = others.next() else {\n    panic!(\"expected a ninth deferred tool; catalog has {} deferred\", counted);\n};","preventionTips":["Size synthetic fixture catalogs above the LRU cap plus margin.","Keep defer_loading defaults centralized so a flip is visible.","Count and assert the deferred set size before running cap tests.","When lowering the LRU cap, update dependent fixture counts in the same commit."],"tags":["rust","test-panic","deferred-tools","lru","fixture-missing"],"backgroundTag":"entity-not-found","analyzedSha":"73e0f67d83c59909b571efdfc88c4bc28c309cb1","analyzedAt":"2026-09-22T01:30:00.501Z","contentChangedAt":"2026-09-22T01:30:00.501Z","schemaVersion":2},"datasetVersion":"2026-09-22T10:30:35.592Z"}