{"abstract":"Required terms in different fields produce a same-field hit.","category":"Search retrieval semantics","checks":7,"contract":"Return whether any single field contains all query terms. Empty query matches any existing field; no fields never matches.","evaluation_group":"model-86c0f8eb10ee80ec","failed_approach":"Restricting to the first field drops legitimate matches in later fields.","family":"z-search-same-field-conjunction","id":"FA-11856","implementations":{"attempt":{"sha256":"4cf09ebcb033a4cabf22ed60b695dfff4bd03d4d8b01ec75a48e659a0c19d2b1","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(fields, query):\n    return bool(fields) and set(query) <= set(fields[0])\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\na='a'+str(N)\ncheck('cross field leakage', solve([[a],['b']],[a,'b']),False)\ncheck('later field complete', solve([[],[a,'b']],[a,'b']),True)\ncheck('first field complete', solve([[a,'b'],[]],[a,'b']),True)\ncheck('no fields', solve([],[]),False)\ncheck('empty query existing field', solve([[]],[]),True)\ncheck('repeated query term', solve([[a]],[a,a]),True)\ncheck('absent term', solve([[a]],['z']),False)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"351912e278d151c43c278b38c43b54f1974fd5a0237faab6fb20ae7c7b445b44","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(fields, query):\n    return set(query) <= set(t for field in fields for t in field)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\na='a'+str(N)\ncheck('cross field leakage', solve([[a],['b']],[a,'b']),False)\ncheck('later field complete', solve([[],[a,'b']],[a,'b']),True)\ncheck('first field complete', solve([[a,'b'],[]],[a,'b']),True)\ncheck('no fields', solve([],[]),False)\ncheck('empty query existing field', solve([[]],[]),True)\ncheck('repeated query term', solve([[a]],[a,a]),True)\ncheck('absent term', solve([[a]],['z']),False)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"340bcd8c16520f7c60ffbd873624c923ba26f3fb1b44fdc682fbc482f4fbf112","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(fields, query):\n    return any(set(query) <= set(field) for field in fields)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\na='a'+str(N)\ncheck('cross field leakage', solve([[a],['b']],[a,'b']),False)\ncheck('later field complete', solve([[],[a,'b']],[a,'b']),True)\ncheck('first field complete', solve([[a,'b'],[]],[a,'b']),True)\ncheck('no fields', solve([],[]),False)\ncheck('empty query existing field', solve([[]],[]),True)\ncheck('repeated query term', solve([[a]],[a,a]),True)\ncheck('absent term', solve([[a]],['z']),False)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"Inputs are already tokenized or scored; this model makes no claim about production engine performance or linguistic analysis. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"z-search-same-field-conjunction","generated_at":"2026-09-29T14:38:51.674344+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"An offline deterministic retrieval model isolates this search contract from tokenization, storage, and network behavior.","repair":"Test the entire query against each field independently.","root_cause":"Flattened document fields erase the field boundary required by the query.","sha256":"3635220e85a9996c855d072c3289cd2e2e9308379187027e61b3df0439233f44","title":"Required terms in different fields produce a same-field hit · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":40.342,"exit_code":1,"observations":[{"actual":false,"check":"cross field leakage","expected":false,"passed":true},{"actual":false,"check":"later field complete","expected":true,"passed":false},{"actual":true,"check":"first field complete","expected":true,"passed":true},{"actual":false,"check":"no fields","expected":false,"passed":true},{"actual":true,"check":"empty query existing field","expected":true,"passed":true},{"actual":true,"check":"repeated query term","expected":true,"passed":true},{"actual":false,"check":"absent term","expected":false,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"cross field leakage\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"later field complete\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"first field complete\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"no fields\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"empty query existing field\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"repeated query term\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"absent term\", \"actual\": false, \"expected\": false, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":38.747,"exit_code":1,"observations":[{"actual":true,"check":"cross field leakage","expected":false,"passed":false},{"actual":true,"check":"later field complete","expected":true,"passed":true},{"actual":true,"check":"first field complete","expected":true,"passed":true},{"actual":true,"check":"no fields","expected":false,"passed":false},{"actual":true,"check":"empty query existing field","expected":true,"passed":true},{"actual":true,"check":"repeated query term","expected":true,"passed":true},{"actual":false,"check":"absent term","expected":false,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"cross field leakage\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"later field complete\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"first field complete\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"no fields\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"empty query existing field\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"repeated query term\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"absent term\", \"actual\": false, \"expected\": false, \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":40.582,"exit_code":0,"observations":[{"actual":false,"check":"cross field leakage","expected":false,"passed":true},{"actual":true,"check":"later field complete","expected":true,"passed":true},{"actual":true,"check":"first field complete","expected":true,"passed":true},{"actual":false,"check":"no fields","expected":false,"passed":true},{"actual":true,"check":"empty query existing field","expected":true,"passed":true},{"actual":true,"check":"repeated query term","expected":true,"passed":true},{"actual":false,"check":"absent term","expected":false,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"cross field leakage\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"later field complete\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"first field complete\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"no fields\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"empty query existing field\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"repeated query term\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"absent term\", \"actual\": false, \"expected\": false, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}