{"abstract":"An untouched one-shot body or a discarded body is rejected.","category":"HTTP redirects","checks":6,"contract":"Prepare a redirect replay from a bounded upload cursor. The explicit fixture inputs and outputs define a bounded offline policy; request identity must accompany the decision.","evaluation_group":"s3-http-redirects-body-replay-cursor","failed_approach":"The partial repair uses 'consumed and not seekable' and still fails an explicit boundary or control.","family":"s3-http-redirects-body-replay-cursor-nonseekable-consumption","id":"FA-27951","implementations":{"attempt":{"sha256":"e349c7835ccc4579751491f186555cd39f9ec27cbe3840f71abda16256e6b474","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, cursor, start, length, seekable, consumed, preserved):\n    return {'request': request, 'decision': [start if preserved else cursor, max(0, length - (cursor-start)), consumed and not seekable, length if preserved else 0, preserved and seekable and cursor != start]} \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', 7, 3, 10, True, True, True), {'request': '/requests/' + str(N) + '/0', 'decision': [3, 6, False, 10, True]})\ncheck('fixture 2', solve('/requests/' + str(N) + '/1', 3, 3, 10, True, False, True), {'request': '/requests/' + str(N) + '/1', 'decision': [3, 10, False, 10, False]})\ncheck('fixture 3', solve('/requests/' + str(N) + '/2', 5, 3, 10, False, True, True), {'request': '/requests/' + str(N) + '/2', 'decision': [3, 8, True, 10, False]})\ncheck('fixture 4', solve('/requests/' + str(N) + '/3', 3, 3, 10, False, False, True), {'request': '/requests/' + str(N) + '/3', 'decision': [3, 10, False, 10, False]})\ncheck('fixture 5', solve('/requests/' + str(N) + '/4', 5, 3, 10, False, True, False), {'request': '/requests/' + str(N) + '/4', 'decision': [5, 8, False, 0, False]})\ncheck('fixture 6', solve('/requests/' + str(N) + '/5', 5, 3, 10, True, True, False), {'request': '/requests/' + str(N) + '/5', 'decision': [5, 8, False, 0, 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":"b3bcffef7c46356ca752edacb8f66dd378c42f255aee29f798723366d411424b","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, cursor, start, length, seekable, consumed, preserved):\n    return {'request': request, 'decision': [start if preserved else cursor, max(0, length - (cursor-start)), preserved and not seekable, length if preserved else 0, preserved and seekable and cursor != start]} \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', 7, 3, 10, True, True, True), {'request': '/requests/' + str(N) + '/0', 'decision': [3, 6, False, 10, True]})\ncheck('fixture 2', solve('/requests/' + str(N) + '/1', 3, 3, 10, True, False, True), {'request': '/requests/' + str(N) + '/1', 'decision': [3, 10, False, 10, False]})\ncheck('fixture 3', solve('/requests/' + str(N) + '/2', 5, 3, 10, False, True, True), {'request': '/requests/' + str(N) + '/2', 'decision': [3, 8, True, 10, False]})\ncheck('fixture 4', solve('/requests/' + str(N) + '/3', 3, 3, 10, False, False, True), {'request': '/requests/' + str(N) + '/3', 'decision': [3, 10, False, 10, False]})\ncheck('fixture 5', solve('/requests/' + str(N) + '/4', 5, 3, 10, False, True, False), {'request': '/requests/' + str(N) + '/4', 'decision': [5, 8, False, 0, False]})\ncheck('fixture 6', solve('/requests/' + str(N) + '/5', 5, 3, 10, True, True, False), {'request': '/requests/' + str(N) + '/5', 'decision': [5, 8, False, 0, 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":"83c767976cc0a58c7b5e688da43055008476012af749cff0ba0bfe079508f9b3","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, cursor, start, length, seekable, consumed, preserved):\n    return {'request': request, 'decision': [start if preserved else cursor, max(0, length - (cursor-start)), preserved and consumed and not seekable, length if preserved else 0, preserved and seekable and cursor != start]} \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', 7, 3, 10, True, True, True), {'request': '/requests/' + str(N) + '/0', 'decision': [3, 6, False, 10, True]})\ncheck('fixture 2', solve('/requests/' + str(N) + '/1', 3, 3, 10, True, False, True), {'request': '/requests/' + str(N) + '/1', 'decision': [3, 10, False, 10, False]})\ncheck('fixture 3', solve('/requests/' + str(N) + '/2', 5, 3, 10, False, True, True), {'request': '/requests/' + str(N) + '/2', 'decision': [3, 8, True, 10, False]})\ncheck('fixture 4', solve('/requests/' + str(N) + '/3', 3, 3, 10, False, False, True), {'request': '/requests/' + str(N) + '/3', 'decision': [3, 10, False, 10, False]})\ncheck('fixture 5', solve('/requests/' + str(N) + '/4', 5, 3, 10, False, True, False), {'request': '/requests/' + str(N) + '/4', 'decision': [5, 8, False, 0, False]})\ncheck('fixture 6', solve('/requests/' + str(N) + '/5', 5, 3, 10, True, True, False), {'request': '/requests/' + str(N) + '/5', 'decision': [5, 8, False, 0, 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":"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-body-replay-cursor-nonseekable-consumption","generated_at":"2026-09-29T14:41:29.625647+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.","repair":"At this decision use 'preserved and consumed and not seekable', preserving the other controller outputs.","root_cause":"The nonseekable-consumption decision uses 'preserved and not seekable'; this violates the stipulated controller policy.","sha256":"bdbd61833bf472a34674701d412a664f865020e1a06dae4146d153963b55d201","title":"Prepare a redirect replay from a bounded upload cursor: nonseekable consumption · case 01","variant":1,"variant_policy":"N changes request correlation identity. Policy boundary fixtures are reused; numbered variants are not independent examples.","verification":{"attempt":{"elapsed_ms":41.467,"exit_code":1,"observations":[{"actual":{"decision":[3,6,false,10,true],"request":"/requests/1/0"},"check":"fixture 1","expected":{"decision":[3,6,false,10,true],"request":"/requests/1/0"},"passed":true},{"actual":{"decision":[3,10,false,10,false],"request":"/requests/1/1"},"check":"fixture 2","expected":{"decision":[3,10,false,10,false],"request":"/requests/1/1"},"passed":true},{"actual":{"decision":[3,8,true,10,false],"request":"/requests/1/2"},"check":"fixture 3","expected":{"decision":[3,8,true,10,false],"request":"/requests/1/2"},"passed":true},{"actual":{"decision":[3,10,false,10,false],"request":"/requests/1/3"},"check":"fixture 4","expected":{"decision":[3,10,false,10,false],"request":"/requests/1/3"},"passed":true},{"actual":{"decision":[5,8,true,0,false],"request":"/requests/1/4"},"check":"fixture 5","expected":{"decision":[5,8,false,0,false],"request":"/requests/1/4"},"passed":false},{"actual":{"decision":[5,8,false,0,false],"request":"/requests/1/5"},"check":"fixture 6","expected":{"decision":[5,8,false,0,false],"request":"/requests/1/5"},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": {\"request\": \"/requests/1/0\", \"decision\": [3, 6, false, 10, true]}, \"expected\": {\"request\": \"/requests/1/0\", \"decision\": [3, 6, false, 10, true]}, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": {\"request\": \"/requests/1/1\", \"decision\": [3, 10, false, 10, false]}, \"expected\": {\"request\": \"/requests/1/1\", \"decision\": [3, 10, false, 10, false]}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {\"request\": \"/requests/1/2\", \"decision\": [3, 8, true, 10, false]}, \"expected\": {\"request\": \"/requests/1/2\", \"decision\": [3, 8, true, 10, false]}, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": {\"request\": \"/requests/1/3\", \"decision\": [3, 10, false, 10, false]}, \"expected\": {\"request\": \"/requests/1/3\", \"decision\": [3, 10, false, 10, false]}, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": {\"request\": \"/requests/1/4\", \"decision\": [5, 8, true, 0, false]}, \"expected\": {\"request\": \"/requests/1/4\", \"decision\": [5, 8, false, 0, false]}, \"passed\": false}, {\"check\": \"fixture 6\", \"actual\": {\"request\": \"/requests/1/5\", \"decision\": [5, 8, false, 0, false]}, \"expected\": {\"request\": \"/requests/1/5\", \"decision\": [5, 8, false, 0, false]}, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.448,"exit_code":1,"observations":[{"actual":{"decision":[3,6,false,10,true],"request":"/requests/1/0"},"check":"fixture 1","expected":{"decision":[3,6,false,10,true],"request":"/requests/1/0"},"passed":true},{"actual":{"decision":[3,10,false,10,false],"request":"/requests/1/1"},"check":"fixture 2","expected":{"decision":[3,10,false,10,false],"request":"/requests/1/1"},"passed":true},{"actual":{"decision":[3,8,true,10,false],"request":"/requests/1/2"},"check":"fixture 3","expected":{"decision":[3,8,true,10,false],"request":"/requests/1/2"},"passed":true},{"actual":{"decision":[3,10,true,10,false],"request":"/requests/1/3"},"check":"fixture 4","expected":{"decision":[3,10,false,10,false],"request":"/requests/1/3"},"passed":false},{"actual":{"decision":[5,8,false,0,false],"request":"/requests/1/4"},"check":"fixture 5","expected":{"decision":[5,8,false,0,false],"request":"/requests/1/4"},"passed":true},{"actual":{"decision":[5,8,false,0,false],"request":"/requests/1/5"},"check":"fixture 6","expected":{"decision":[5,8,false,0,false],"request":"/requests/1/5"},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": {\"request\": \"/requests/1/0\", \"decision\": [3, 6, false, 10, true]}, \"expected\": {\"request\": \"/requests/1/0\", \"decision\": [3, 6, false, 10, true]}, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": {\"request\": \"/requests/1/1\", \"decision\": [3, 10, false, 10, false]}, \"expected\": {\"request\": \"/requests/1/1\", \"decision\": [3, 10, false, 10, false]}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {\"request\": \"/requests/1/2\", \"decision\": [3, 8, true, 10, false]}, \"expected\": {\"request\": \"/requests/1/2\", \"decision\": [3, 8, true, 10, false]}, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": {\"request\": \"/requests/1/3\", \"decision\": [3, 10, true, 10, false]}, \"expected\": {\"request\": \"/requests/1/3\", \"decision\": [3, 10, false, 10, false]}, \"passed\": false}, {\"check\": \"fixture 5\", \"actual\": {\"request\": \"/requests/1/4\", \"decision\": [5, 8, false, 0, false]}, \"expected\": {\"request\": \"/requests/1/4\", \"decision\": [5, 8, false, 0, false]}, \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": {\"request\": \"/requests/1/5\", \"decision\": [5, 8, false, 0, false]}, \"expected\": {\"request\": \"/requests/1/5\", \"decision\": [5, 8, false, 0, false]}, \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":37.115,"exit_code":0,"observations":[{"actual":{"decision":[3,6,false,10,true],"request":"/requests/1/0"},"check":"fixture 1","expected":{"decision":[3,6,false,10,true],"request":"/requests/1/0"},"passed":true},{"actual":{"decision":[3,10,false,10,false],"request":"/requests/1/1"},"check":"fixture 2","expected":{"decision":[3,10,false,10,false],"request":"/requests/1/1"},"passed":true},{"actual":{"decision":[3,8,true,10,false],"request":"/requests/1/2"},"check":"fixture 3","expected":{"decision":[3,8,true,10,false],"request":"/requests/1/2"},"passed":true},{"actual":{"decision":[3,10,false,10,false],"request":"/requests/1/3"},"check":"fixture 4","expected":{"decision":[3,10,false,10,false],"request":"/requests/1/3"},"passed":true},{"actual":{"decision":[5,8,false,0,false],"request":"/requests/1/4"},"check":"fixture 5","expected":{"decision":[5,8,false,0,false],"request":"/requests/1/4"},"passed":true},{"actual":{"decision":[5,8,false,0,false],"request":"/requests/1/5"},"check":"fixture 6","expected":{"decision":[5,8,false,0,false],"request":"/requests/1/5"},"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"fixture 1\", \"actual\": {\"request\": \"/requests/1/0\", \"decision\": [3, 6, false, 10, true]}, \"expected\": {\"request\": \"/requests/1/0\", \"decision\": [3, 6, false, 10, true]}, \"passed\": true}, {\"check\": \"fixture 2\", \"actual\": {\"request\": \"/requests/1/1\", \"decision\": [3, 10, false, 10, false]}, \"expected\": {\"request\": \"/requests/1/1\", \"decision\": [3, 10, false, 10, false]}, \"passed\": true}, {\"check\": \"fixture 3\", \"actual\": {\"request\": \"/requests/1/2\", \"decision\": [3, 8, true, 10, false]}, \"expected\": {\"request\": \"/requests/1/2\", \"decision\": [3, 8, true, 10, false]}, \"passed\": true}, {\"check\": \"fixture 4\", \"actual\": {\"request\": \"/requests/1/3\", \"decision\": [3, 10, false, 10, false]}, \"expected\": {\"request\": \"/requests/1/3\", \"decision\": [3, 10, false, 10, false]}, \"passed\": true}, {\"check\": \"fixture 5\", \"actual\": {\"request\": \"/requests/1/4\", \"decision\": [5, 8, false, 0, false]}, \"expected\": {\"request\": \"/requests/1/4\", \"decision\": [5, 8, false, 0, false]}, \"passed\": true}, {\"check\": \"fixture 6\", \"actual\": {\"request\": \"/requests/1/5\", \"decision\": [5, 8, false, 0, false]}, \"expected\": {\"request\": \"/requests/1/5\", \"decision\": [5, 8, false, 0, false]}, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}