{"abstract":"Compose explicit redirect policy decisions with veto precedence and reason retention: the all veto reasons branch emits an incorrect decision.","category":"HTTP redirects","checks":7,"contract":"Compose explicit redirect policy decisions with veto precedence and reason retention. The explicit fixture inputs and outputs define a bounded offline policy; request identity must accompany the decision.","contract_signature":"request, decisions, mode, inspected, override, target","evaluation_group":"s3-http-redirects-policy-veto-composition","failed_approach":"The partial repair uses '[k for k,v in decisions]' and still fails an explicit boundary or control.","family":"s3-http-redirects-policy-veto-composition-all-veto-reasons","id":"FA-29201","implementations":{"attempt":{"sha256":"d671cd675b033cbda09dcfa05042f2802c4698fc0bdf2d7959b616407448cb30","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nfrom urllib.parse import urlsplit, unquote, quote\nimport posixpath\nimport re\nN = 1\nobservations = []\ndef solve(request, decisions, mode, inspected, override, target):\n    return {'request': request, 'decision': [all(v for k,v in decisions), next((k for k,v in decisions if not v),None), [k for k,v in decisions], mode == 'follow' and inspected, override and mode != 'error', mode == 'manual', [k for k,v in decisions], target is not None and override, sum(not v for k,v in decisions), inspected and all(v for k,v in decisions)]} \ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve('/requests/' + str(N) + '/0', [['scheme', True], ['host', False], ['port', True]], 'follow', True, False, '/b'), {'request': '/requests/' + str(N) + '/0', 'decision': [False, 'host', ['host'], True, False, False, ['scheme', 'host', 'port'], False, 1, False]})\ncheck('fixture 2', solve('/requests/' + str(N) + '/1', [['scheme', True], ['host', True]], 'manual', False, False, '/c'), {'request': '/requests/' + str(N) + '/1', 'decision': [True, None, [], False, False, True, ['scheme', 'host'], False, 0, False]})\ncheck('fixture 3', solve('/requests/' + str(N) + '/2', [], 'error', True, True, '/d'), {'request': '/requests/' + str(N) + '/2', 'decision': [True, None, [], False, False, False, [], True, 0, True]})\ncheck('fixture 4', solve('/requests/' + str(N) + '/3', [['host', False], ['port', False]], 'follow', True, True, '/e'), {'request': '/requests/' + str(N) + '/3', 'decision': [False, 'host', ['host', 'port'], True, True, False, ['host', 'port'], True, 2, False]})\ncheck('fixture 5', solve('/requests/' + str(N) + '/4', [['scheme', True]], 'follow', False, False, None), {'request': '/requests/' + str(N) + '/4', 'decision': [True, None, [], False, False, False, ['scheme'], False, 0, False]})\ncheck('fixture 6', solve('/requests/' + str(N) + '/5', [['scheme', False], ['host', True]], 'manual', True, True, '/f'), {'request': '/requests/' + str(N) + '/5', 'decision': [False, 'scheme', ['scheme'], False, True, True, ['scheme', 'host'], True, 1, False]})\ncheck('fixture 7', solve('/requests/' + str(N) + '/6', [['x', True]], 'follow', True, True, None), {'request': '/requests/' + str(N) + '/6', 'decision': [True, None, [], True, True, False, ['x'], False, 0, True]})\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":"5544f08afc4744ffb93f0b8b96fdf6144ebc999dc8507e9f356dbe9b76ec6b99","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nfrom urllib.parse import urlsplit, unquote, quote\nimport posixpath\nimport re\nN = 1\nobservations = []\ndef solve(request, decisions, mode, inspected, override, target):\n    return {'request': request, 'decision': [all(v for k,v in decisions), next((k for k,v in decisions if not v),None), [k for k,v in decisions if not v][:1], mode == 'follow' and inspected, override and mode != 'error', mode == 'manual', [k for k,v in decisions], target is not None and override, sum(not v for k,v in decisions), inspected and all(v for k,v in decisions)]} \ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('fixture 1', solve('/requests/' + str(N) + '/0', [['scheme', True], ['host', False], ['port', True]], 'follow', True, False, '/b'), {'request': '/requests/' + str(N) + '/0', 'decision': [False, 'host', ['host'], True, False, False, ['scheme', 'host', 'port'], False, 1, False]})\ncheck('fixture 2', solve('/requests/' + str(N) + '/1', [['scheme', True], ['host', True]], 'manual', False, False, '/c'), {'request': '/requests/' + str(N) + '/1', 'decision': [True, None, [], False, False, True, ['scheme', 'host'], False, 0, False]})\ncheck('fixture 3', solve('/requests/' + str(N) + '/2', [], 'error', True, True, '/d'), {'request': '/requests/' + str(N) + '/2', 'decision': [True, None, [], False, False, False, [], True, 0, True]})\ncheck('fixture 4', solve('/requests/' + str(N) + '/3', [['host', False], ['port', False]], 'follow', True, True, '/e'), {'request': '/requests/' + str(N) + '/3', 'decision': [False, 'host', ['host', 'port'], True, True, False, ['host', 'port'], True, 2, False]})\ncheck('fixture 5', solve('/requests/' + str(N) + '/4', [['scheme', True]], 'follow', False, False, None), {'request': '/requests/' + str(N) + '/4', 'decision': [True, None, [], False, False, False, ['scheme'], False, 0, False]})\ncheck('fixture 6', solve('/requests/' + str(N) + '/5', [['scheme', False], ['host', True]], 'manual', True, True, '/f'), {'request': '/requests/' + str(N) + '/5', 'decision': [False, 'scheme', ['scheme'], False, True, True, ['scheme', 'host'], True, 1, False]})\ncheck('fixture 7', solve('/requests/' + str(N) + '/6', [['x', True]], 'follow', True, True, None), {'request': '/requests/' + str(N) + '/6', 'decision': [True, None, [], True, True, False, ['x'], False, 0, True]})\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":"Stipulated offline redirect policy, not a complete HTTP, browser, URL, cache, or security implementation. Numbered variants vary request correlation identity. 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":"s3-http-redirects-policy-veto-composition-all-veto-reasons","generated_at":"2026-09-29T14:41:41.241810+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Models a redirect controller decision before following a target or exposing a redirect result.","root_cause":"The all-veto-reasons decision uses '[k for k,v in decisions if not v][:1]'; this violates the stipulated controller policy.","sha256":"2220a2198747a51622b262ef08bf96065cdd5bd2925fa7363b32d9599efd4919","title":"Compose explicit redirect policy decisions with veto precedence and reason retention: all veto reasons · case 01","variant":1,"variant_policy":"N changes request correlation identity. Policy boundary fixtures are reused; numbered variants are not independent examples.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":38.822,"exit_code":1,"observations":[{"actual":{"decision":[false,"host",["scheme","host","port"],true,false,false,["scheme","host","port"],false,1,false],"request":"/requests/1/0"},"check":"fixture 1","expected":{"decision":[false,"host",["host"],true,false,false,["scheme","host","port"],false,1,false],"request":"/requests/1/0"},"passed":false},{"actual":{"decision":[true,null,["scheme","host"],false,false,true,["scheme","host"],false,0,false],"request":"/requests/1/1"},"check":"fixture 2","expected":{"decision":[true,null,[],false,false,true,["scheme","host"],false,0,false],"request":"/requests/1/1"},"passed":false},{"actual":{"decision":[true,null,[],false,false,false,[],true,0,true],"request":"/requests/1/2"},"check":"fixture 3","expected":{"decision":[true,null,[],false,false,false,[],true,0,true],"request":"/requests/1/2"},"passed":true},{"actual":{"decision":[false,"host",["host","port"],true,true,false,["host","port"],true,2,false],"request":"/requests/1/3"},"check":"fixture 4","expected":{"decision":[false,"host",["host","port"],true,true,false,["host","port"],true,2,false],"request":"/requests/1/3"},"passed":true},{"actual":{"decision":[true,null,["scheme"],false,false,false,["scheme"],false,0,false],"request":"/requests/1/4"},"check":"fixture 5","expected":{"decision":[true,null,[],false,false,false,["scheme"],false,0,false],"request":"/requests/1/4"},"passed":false},{"actual":{"decision":[false,"scheme",["scheme","host"],false,true,true,["scheme","host"],true,1,false],"request":"/requests/1/5"},"check":"fixture 6","expected":{"decision":[false,"scheme",["scheme"],false,true,true,["scheme","host"],true,1,false],"request":"/requests/1/5"},"passed":false},{"actual":{"decision":[true,null,["x"],true,true,false,["x"],false,0,true],"request":"/requests/1/6"},"check":"fixture 7","expected":{"decision":[true,null,[],true,true,false,["x"],false,0,true],"request":"/requests/1/6"},"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": {\"request\": \"/requests/1/0\", \"decision\": [false, \"host\", [\"scheme\", \"host\", \"port\"], true, false, false, [\"scheme\", \"host\", \"port\"], false, 1, false]}, \"expected\": {\"request\": \"/requests/1/0\", \"decision\": [false, \"host\", [\"host\"], true, false, false, [\"scheme\", \"host\", \"port\"], false, 1, false]}, \"passed\": false}, {\"check\": \"fixture 2\", \"actual\": {\"request\": \"/requests/1/1\", \"decision\": [true, null, [\"scheme\", \"host\"], false, false, true, [\"scheme\", \"host\"], false, 0, false]}, \"expected\": {\"request\": \"/requests/1/1\", \"decision\": [true, null, [], false, false, true, [\"scheme\", \"host\"], false, 0, false]}, \"passed\": false}, {\"check\": \"fixture 3\", \"actual\": {\"request\": \"/requests/1/2\", \"decision\": [true, null, [], false, false, false, [], true, 0, true]}, \"expected\": {\"request\": \"/requests/1/2\", \"decision\": [true, null, [], false, false, false, [], true, 0, true]}, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": {\"request\": \"/requests/1/3\", \"decision\": [false, \"host\", [\"host\", \"port\"], true, true, false, [\"host\", \"port\"], true, 2, false]}, \"expected\": {\"request\": \"/requests/1/3\", \"decision\": [false, \"host\", [\"host\", \"port\"], true, true, false, [\"host\", \"port\"], true, 2, false]}, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": {\"request\": \"/requests/1/4\", \"decision\": [true, null, [\"scheme\"], false, false, false, [\"scheme\"], false, 0, false]}, \"expected\": {\"request\": \"/requests/1/4\", \"decision\": [true, null, [], false, false, false, [\"scheme\"], false, 0, false]}, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": {\"request\": \"/requests/1/5\", \"decision\": [false, \"scheme\", [\"scheme\", \"host\"], false, true, true, [\"scheme\", \"host\"], true, 1, false]}, \"expected\": {\"request\": \"/requests/1/5\", \"decision\": [false, \"scheme\", [\"scheme\"], false, true, true, [\"scheme\", \"host\"], true, 1, false]}, \"passed\": false}, {\"check\": \"fixture 7\", \"actual\": {\"request\": \"/requests/1/6\", \"decision\": [true, null, [\"x\"], true, true, false, [\"x\"], false, 0, true]}, \"expected\": {\"request\": \"/requests/1/6\", \"decision\": [true, null, [], true, true, false, [\"x\"], false, 0, true]}, \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":43.455,"exit_code":1,"observations":[{"actual":{"decision":[false,"host",["host"],true,false,false,["scheme","host","port"],false,1,false],"request":"/requests/1/0"},"check":"fixture 1","expected":{"decision":[false,"host",["host"],true,false,false,["scheme","host","port"],false,1,false],"request":"/requests/1/0"},"passed":true},{"actual":{"decision":[true,null,[],false,false,true,["scheme","host"],false,0,false],"request":"/requests/1/1"},"check":"fixture 2","expected":{"decision":[true,null,[],false,false,true,["scheme","host"],false,0,false],"request":"/requests/1/1"},"passed":true},{"actual":{"decision":[true,null,[],false,false,false,[],true,0,true],"request":"/requests/1/2"},"check":"fixture 3","expected":{"decision":[true,null,[],false,false,false,[],true,0,true],"request":"/requests/1/2"},"passed":true},{"actual":{"decision":[false,"host",["host"],true,true,false,["host","port"],true,2,false],"request":"/requests/1/3"},"check":"fixture 4","expected":{"decision":[false,"host",["host","port"],true,true,false,["host","port"],true,2,false],"request":"/requests/1/3"},"passed":false},{"actual":{"decision":[true,null,[],false,false,false,["scheme"],false,0,false],"request":"/requests/1/4"},"check":"fixture 5","expected":{"decision":[true,null,[],false,false,false,["scheme"],false,0,false],"request":"/requests/1/4"},"passed":true},{"actual":{"decision":[false,"scheme",["scheme"],false,true,true,["scheme","host"],true,1,false],"request":"/requests/1/5"},"check":"fixture 6","expected":{"decision":[false,"scheme",["scheme"],false,true,true,["scheme","host"],true,1,false],"request":"/requests/1/5"},"passed":true},{"actual":{"decision":[true,null,[],true,true,false,["x"],false,0,true],"request":"/requests/1/6"},"check":"fixture 7","expected":{"decision":[true,null,[],true,true,false,["x"],false,0,true],"request":"/requests/1/6"},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": {\"request\": \"/requests/1/0\", \"decision\": [false, \"host\", [\"host\"], true, false, false, [\"scheme\", \"host\", \"port\"], false, 1, false]}, \"expected\": {\"request\": \"/requests/1/0\", \"decision\": [false, \"host\", [\"host\"], true, false, false, [\"scheme\", \"host\", \"port\"], false, 1, false]}, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": {\"request\": \"/requests/1/1\", \"decision\": [true, null, [], false, false, true, [\"scheme\", \"host\"], false, 0, false]}, \"expected\": {\"request\": \"/requests/1/1\", \"decision\": [true, null, [], false, false, true, [\"scheme\", \"host\"], false, 0, false]}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {\"request\": \"/requests/1/2\", \"decision\": [true, null, [], false, false, false, [], true, 0, true]}, \"expected\": {\"request\": \"/requests/1/2\", \"decision\": [true, null, [], false, false, false, [], true, 0, true]}, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": {\"request\": \"/requests/1/3\", \"decision\": [false, \"host\", [\"host\"], true, true, false, [\"host\", \"port\"], true, 2, false]}, \"expected\": {\"request\": \"/requests/1/3\", \"decision\": [false, \"host\", [\"host\", \"port\"], true, true, false, [\"host\", \"port\"], true, 2, false]}, \"passed\": false}, {\"check\": \"fixture 5\", \"actual\": {\"request\": \"/requests/1/4\", \"decision\": [true, null, [], false, false, false, [\"scheme\"], false, 0, false]}, \"expected\": {\"request\": \"/requests/1/4\", \"decision\": [true, null, [], false, false, false, [\"scheme\"], false, 0, false]}, \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": {\"request\": \"/requests/1/5\", \"decision\": [false, \"scheme\", [\"scheme\"], false, true, true, [\"scheme\", \"host\"], true, 1, false]}, \"expected\": {\"request\": \"/requests/1/5\", \"decision\": [false, \"scheme\", [\"scheme\"], false, true, true, [\"scheme\", \"host\"], true, 1, false]}, \"passed\": true}, {\"check\": \"fixture 7\", \"actual\": {\"request\": \"/requests/1/6\", \"decision\": [true, null, [], true, true, false, [\"x\"], false, 0, true]}, \"expected\": {\"request\": \"/requests/1/6\", \"decision\": [true, null, [], true, true, false, [\"x\"], false, 0, true]}, \"passed\": true}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}