{"abstract":"A remote archive reader locates the central directory from a suffix range response: the central directory must end before the end record begins.","category":"HTTP ranges","checks":16,"contract":"x has total representation length, requested suffix length and the hex bytes of the suffix response (the last min(total,suffix) bytes). Emit the suffix Range value (null when it would be zero bytes). Scan backward for the end record signature PK\\x05\\x06 whose little-endian comment length makes the 22-byte record plus comment end exactly at the tail end. Reject multi-disk archives (disk or directory disk nonzero, or differing entry counts) and a directory that extends past the end record. A directory starting inside the tail is [\"local\",tail-index,size]; otherwise request only the missing prefix before the tail as [\"fetch\",inclusive range]. Output [suffix-range,plan-or-null].","evaluation_group":"s3-http_ranges-remote-zip-directory","failed_approach":"The partial repair uses import struct\nT=x['total']\nwant=min(T,x['suffix'])\nhead='bytes=-%d'%want if want>0 else None\ndata=bytes.fromhex(x['tail'])\nbase=T-len(data)\np=len(data)-22\nwhile p>=0:\n    if data[p:p+4]==b'PK\\x05\\x06' and p+22+int.from_bytes(data[p+20:p+22],'little')==len(data): break\n    p-=1\nif p<0: return [head,None]\ndisk,cddisk,n1,n2,size,off=struct.unpack_from('<HHHHII',data,p+4)\nif disk!=0 or cddisk!=0 or n1!=n2: return [head,None]\neocd=base+p\nif off+size>eocd+22: return [head,None]\nif off>=base: return [head,['local',off-base,size]]\nreturn [head,['fetch','bytes=%d-%d'%(off,min(base,off+size)-1)]], which still violates the stated contract.","family":"s3-http_ranges-remote-zip-directory-directory-bounds","id":"FA-27691","implementations":{"attempt":{"sha256":"af9d57414d7f481cfe5426d5eab2abbe4f26bfd76385cab282434284cbbe90de","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    import struct\n    T=x['total']\n    want=min(T,x['suffix'])\n    head='bytes=-%d'%want if want>0 else None\n    data=bytes.fromhex(x['tail'])\n    base=T-len(data)\n    p=len(data)-22\n    while p>=0:\n        if data[p:p+4]==b'PK\\x05\\x06' and p+22+int.from_bytes(data[p+20:p+22],'little')==len(data): break\n        p-=1\n    if p<0: return [head,None]\n    disk,cddisk,n1,n2,size,off=struct.unpack_from('<HHHHII',data,p+4)\n    if disk!=0 or cddisk!=0 or n1!=n2: return [head,None]\n    eocd=base+p\n    if off+size>eocd+22: return [head,None]\n    if off>=base: return [head,['local',off-base,size]]\n    return [head,['fetch','bytes=%d-%d'%(off,min(base,off+size)-1)]]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('directory-bounds fixture 0', json.loads(json.dumps(solve({'suffix':64,'tail':'0101010101010101010101010101010101010101434343434343434343434343434343434343504b0506000000000100010012000000140000000000','total':60}))), json.loads(json.dumps(['bytes=-60',['local',20,18]])))\ncheck('directory-bounds fixture 1', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000000000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',['local',0,18]])))\ncheck('directory-bounds fixture 2', json.loads(json.dumps(solve({'suffix':50,'tail':'43434343434343434343434343434343434300000000000000000000504b0506000000000100010012000000b60300000000','total':1000}))), json.loads(json.dumps(['bytes=-50',['local',0,18]])))\ncheck('directory-bounds fixture 3', json.loads(json.dumps(solve({'suffix':30,'tail':'4343434343434343504b0506000000000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-30',['fetch','bytes=960-969']])))\ncheck('directory-bounds fixture 4', json.loads(json.dumps(solve({'suffix':22,'tail':'504b050600000000010001004e000000840300000000','total':1000}))), json.loads(json.dumps(['bytes=-22',['fetch','bytes=900-977']])))\ncheck('directory-bounds fixture 5', json.loads(json.dumps(solve({'suffix':25,'tail':'504b050600000000010001004b000000840300000300616263','total':1000}))), json.loads(json.dumps(['bytes=-25',['fetch','bytes=900-974']])))\ncheck('directory-bounds fixture 6', json.loads(json.dumps(solve({'suffix':80,'tail':'434343434343434343434343434343434343504b0506000000000100010012000000880000001800504b05060000000001000100000000000000000000007a7a','total':200}))), json.loads(json.dumps(['bytes=-80',['local',0,18]])))\ncheck('directory-bounds fixture 7', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000001000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 8', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506010001000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 9', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000000000100020012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 10', json.loads(json.dumps(solve({'suffix':100,'tail':'02020202020202020202020202020202020202020202020202020202020202020202020202020202504b05060000000001000100140000001e0000000000','total':62}))), json.loads(json.dumps(['bytes=-62',None])))\ncheck('directory-bounds fixture 11', json.loads(json.dumps(solve({'suffix':30,'tail':'030303030303030303030303030303030303030303030303030303030303','total':30}))), json.loads(json.dumps(['bytes=-30',None])))\ncheck('directory-bounds fixture 12', json.loads(json.dumps(solve({'suffix':30,'tail':'000000000000000000000000000000000000000000000000000000000000','total':30}))), json.loads(json.dumps(['bytes=-30',None])))\ncheck('directory-bounds fixture 13', json.loads(json.dumps(solve({'suffix':64,'tail':'','total':0}))), json.loads(json.dumps([None,None])))\ncheck('directory-bounds fixture 14', json.loads(json.dumps(solve({'suffix':64,'tail':'504b0506000000000000000000000000000000000000','total':22}))), json.loads(json.dumps(['bytes=-22',['local',0,0]])))\ncheck('directory-bounds fixture 15', json.loads(json.dumps(solve({'suffix':32+N,'tail':\"11\"*10+\"504b0506\"+\"00000000\"+\"01000100\"+\"0a000000\"+(468-N).to_bytes(4,\"little\").hex()+(N).to_bytes(2,\"little\").hex()+\"63\"*N,'total':500}))), json.loads(json.dumps([\"bytes=-%d\"%(32+N),['local',0,10]])))\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":"b99f0357743b2a208c6cf2594f281eb1285aa1e3cd36083a3844f2972e3e1230","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    import struct\n    T=x['total']\n    want=min(T,x['suffix'])\n    head='bytes=-%d'%want if want>0 else None\n    data=bytes.fromhex(x['tail'])\n    base=T-len(data)\n    p=len(data)-22\n    while p>=0:\n        if data[p:p+4]==b'PK\\x05\\x06' and p+22+int.from_bytes(data[p+20:p+22],'little')==len(data): break\n        p-=1\n    if p<0: return [head,None]\n    disk,cddisk,n1,n2,size,off=struct.unpack_from('<HHHHII',data,p+4)\n    if disk!=0 or cddisk!=0 or n1!=n2: return [head,None]\n    eocd=base+p\n    if off>eocd: return [head,None]\n    if off>=base: return [head,['local',off-base,size]]\n    return [head,['fetch','bytes=%d-%d'%(off,min(base,off+size)-1)]]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('directory-bounds fixture 0', json.loads(json.dumps(solve({'suffix':64,'tail':'0101010101010101010101010101010101010101434343434343434343434343434343434343504b0506000000000100010012000000140000000000','total':60}))), json.loads(json.dumps(['bytes=-60',['local',20,18]])))\ncheck('directory-bounds fixture 1', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000000000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',['local',0,18]])))\ncheck('directory-bounds fixture 2', json.loads(json.dumps(solve({'suffix':50,'tail':'43434343434343434343434343434343434300000000000000000000504b0506000000000100010012000000b60300000000','total':1000}))), json.loads(json.dumps(['bytes=-50',['local',0,18]])))\ncheck('directory-bounds fixture 3', json.loads(json.dumps(solve({'suffix':30,'tail':'4343434343434343504b0506000000000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-30',['fetch','bytes=960-969']])))\ncheck('directory-bounds fixture 4', json.loads(json.dumps(solve({'suffix':22,'tail':'504b050600000000010001004e000000840300000000','total':1000}))), json.loads(json.dumps(['bytes=-22',['fetch','bytes=900-977']])))\ncheck('directory-bounds fixture 5', json.loads(json.dumps(solve({'suffix':25,'tail':'504b050600000000010001004b000000840300000300616263','total':1000}))), json.loads(json.dumps(['bytes=-25',['fetch','bytes=900-974']])))\ncheck('directory-bounds fixture 6', json.loads(json.dumps(solve({'suffix':80,'tail':'434343434343434343434343434343434343504b0506000000000100010012000000880000001800504b05060000000001000100000000000000000000007a7a','total':200}))), json.loads(json.dumps(['bytes=-80',['local',0,18]])))\ncheck('directory-bounds fixture 7', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000001000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 8', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506010001000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 9', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000000000100020012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 10', json.loads(json.dumps(solve({'suffix':100,'tail':'02020202020202020202020202020202020202020202020202020202020202020202020202020202504b05060000000001000100140000001e0000000000','total':62}))), json.loads(json.dumps(['bytes=-62',None])))\ncheck('directory-bounds fixture 11', json.loads(json.dumps(solve({'suffix':30,'tail':'030303030303030303030303030303030303030303030303030303030303','total':30}))), json.loads(json.dumps(['bytes=-30',None])))\ncheck('directory-bounds fixture 12', json.loads(json.dumps(solve({'suffix':30,'tail':'000000000000000000000000000000000000000000000000000000000000','total':30}))), json.loads(json.dumps(['bytes=-30',None])))\ncheck('directory-bounds fixture 13', json.loads(json.dumps(solve({'suffix':64,'tail':'','total':0}))), json.loads(json.dumps([None,None])))\ncheck('directory-bounds fixture 14', json.loads(json.dumps(solve({'suffix':64,'tail':'504b0506000000000000000000000000000000000000','total':22}))), json.loads(json.dumps(['bytes=-22',['local',0,0]])))\ncheck('directory-bounds fixture 15', json.loads(json.dumps(solve({'suffix':32+N,'tail':\"11\"*10+\"504b0506\"+\"00000000\"+\"01000100\"+\"0a000000\"+(468-N).to_bytes(4,\"little\").hex()+(N).to_bytes(2,\"little\").hex()+\"63\"*N,'total':500}))), json.loads(json.dumps([\"bytes=-%d\"%(32+N),['local',0,10]])))\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":"f95dd57da3cae76b1b538ef6a311c479200b56f0e0a21d6a3ef6c608adae9797","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    import struct\n    T=x['total']\n    want=min(T,x['suffix'])\n    head='bytes=-%d'%want if want>0 else None\n    data=bytes.fromhex(x['tail'])\n    base=T-len(data)\n    p=len(data)-22\n    while p>=0:\n        if data[p:p+4]==b'PK\\x05\\x06' and p+22+int.from_bytes(data[p+20:p+22],'little')==len(data): break\n        p-=1\n    if p<0: return [head,None]\n    disk,cddisk,n1,n2,size,off=struct.unpack_from('<HHHHII',data,p+4)\n    if disk!=0 or cddisk!=0 or n1!=n2: return [head,None]\n    eocd=base+p\n    if off+size>eocd: return [head,None]\n    if off>=base: return [head,['local',off-base,size]]\n    return [head,['fetch','bytes=%d-%d'%(off,min(base,off+size)-1)]]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('directory-bounds fixture 0', json.loads(json.dumps(solve({'suffix':64,'tail':'0101010101010101010101010101010101010101434343434343434343434343434343434343504b0506000000000100010012000000140000000000','total':60}))), json.loads(json.dumps(['bytes=-60',['local',20,18]])))\ncheck('directory-bounds fixture 1', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000000000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',['local',0,18]])))\ncheck('directory-bounds fixture 2', json.loads(json.dumps(solve({'suffix':50,'tail':'43434343434343434343434343434343434300000000000000000000504b0506000000000100010012000000b60300000000','total':1000}))), json.loads(json.dumps(['bytes=-50',['local',0,18]])))\ncheck('directory-bounds fixture 3', json.loads(json.dumps(solve({'suffix':30,'tail':'4343434343434343504b0506000000000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-30',['fetch','bytes=960-969']])))\ncheck('directory-bounds fixture 4', json.loads(json.dumps(solve({'suffix':22,'tail':'504b050600000000010001004e000000840300000000','total':1000}))), json.loads(json.dumps(['bytes=-22',['fetch','bytes=900-977']])))\ncheck('directory-bounds fixture 5', json.loads(json.dumps(solve({'suffix':25,'tail':'504b050600000000010001004b000000840300000300616263','total':1000}))), json.loads(json.dumps(['bytes=-25',['fetch','bytes=900-974']])))\ncheck('directory-bounds fixture 6', json.loads(json.dumps(solve({'suffix':80,'tail':'434343434343434343434343434343434343504b0506000000000100010012000000880000001800504b05060000000001000100000000000000000000007a7a','total':200}))), json.loads(json.dumps(['bytes=-80',['local',0,18]])))\ncheck('directory-bounds fixture 7', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000001000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 8', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506010001000100010012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 9', json.loads(json.dumps(solve({'suffix':40,'tail':'434343434343434343434343434343434343504b0506000000000100020012000000c00300000000','total':1000}))), json.loads(json.dumps(['bytes=-40',None])))\ncheck('directory-bounds fixture 10', json.loads(json.dumps(solve({'suffix':100,'tail':'02020202020202020202020202020202020202020202020202020202020202020202020202020202504b05060000000001000100140000001e0000000000','total':62}))), json.loads(json.dumps(['bytes=-62',None])))\ncheck('directory-bounds fixture 11', json.loads(json.dumps(solve({'suffix':30,'tail':'030303030303030303030303030303030303030303030303030303030303','total':30}))), json.loads(json.dumps(['bytes=-30',None])))\ncheck('directory-bounds fixture 12', json.loads(json.dumps(solve({'suffix':30,'tail':'000000000000000000000000000000000000000000000000000000000000','total':30}))), json.loads(json.dumps(['bytes=-30',None])))\ncheck('directory-bounds fixture 13', json.loads(json.dumps(solve({'suffix':64,'tail':'','total':0}))), json.loads(json.dumps([None,None])))\ncheck('directory-bounds fixture 14', json.loads(json.dumps(solve({'suffix':64,'tail':'504b0506000000000000000000000000000000000000','total':22}))), json.loads(json.dumps(['bytes=-22',['local',0,0]])))\ncheck('directory-bounds fixture 15', json.loads(json.dumps(solve({'suffix':32+N,'tail':\"11\"*10+\"504b0506\"+\"00000000\"+\"01000100\"+\"0a000000\"+(468-N).to_bytes(4,\"little\").hex()+(N).to_bytes(2,\"little\").hex()+\"63\"*N,'total':500}))), json.loads(json.dumps([\"bytes=-%d\"%(32+N),['local',0,10]])))\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":"Deterministic simplified range service, with stipulated local policies and already parsed trusted inputs; not a complete HTTP implementation. 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_ranges-remote-zip-directory-directory-bounds","generated_at":"2026-09-29T14:41:27.341344+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Range responses combine representation identity, conditional requests, framing, and partial-object state.","repair":"Apply the bounded decision exactly: import struct\nT=x['total']\nwant=min(T,x['suffix'])\nhead='bytes=-%d'%want if want>0 else None\ndata=bytes.fromhex(x['tail'])\nbase=T-len(data)\np=len(data)-22\nwhile p>=0:\n    if data[p:p+4]==b'PK\\x05\\x06' and p+22+int.from_bytes(data[p+20:p+22],'little')==len(data): break\n    p-=1\nif p<0: return [head,None]\ndisk,cddisk,n1,n2,size,off=struct.unpack_from('<HHHHII',data,p+4)\nif disk!=0 or cddisk!=0 or n1!=n2: return [head,None]\neocd=base+p\nif off+size>eocd: return [head,None]\nif off>=base: return [head,['local',off-base,size]]\nreturn [head,['fetch','bytes=%d-%d'%(off,min(base,off+size)-1)]]","root_cause":"The remote-zip-directory-directory-bounds decision uses import struct\nT=x['total']\nwant=min(T,x['suffix'])\nhead='bytes=-%d'%want if want>0 else None\ndata=bytes.fromhex(x['tail'])\nbase=T-len(data)\np=len(data)-22\nwhile p>=0:\n    if data[p:p+4]==b'PK\\x05\\x06' and p+22+int.from_bytes(data[p+20:p+22],'little')==len(data): break\n    p-=1\nif p<0: return [head,None]\ndisk,cddisk,n1,n2,size,off=struct.unpack_from('<HHHHII',data,p+4)\nif disk!=0 or cddisk!=0 or n1!=n2: return [head,None]\neocd=base+p\nif off>eocd: return [head,None]\nif off>=base: return [head,['local',off-base,size]]\nreturn [head,['fetch','bytes=%d-%d'%(off,min(base,off+size)-1)]].","sha256":"7b5428e395f0274758b26045c4ccac3c4e6692cb26a3f15002de95695b2ccd9c","title":"A remote archive reader locates the central directory from a suffix range response: the central directory must end before the end record begins · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":39.54,"exit_code":1,"observations":[{"actual":["bytes=-60",["local",20,18]],"check":"directory-bounds fixture 0","expected":["bytes=-60",["local",20,18]],"passed":true},{"actual":["bytes=-40",["local",0,18]],"check":"directory-bounds fixture 1","expected":["bytes=-40",["local",0,18]],"passed":true},{"actual":["bytes=-50",["local",0,18]],"check":"directory-bounds fixture 2","expected":["bytes=-50",["local",0,18]],"passed":true},{"actual":["bytes=-30",["fetch","bytes=960-969"]],"check":"directory-bounds fixture 3","expected":["bytes=-30",["fetch","bytes=960-969"]],"passed":true},{"actual":["bytes=-22",["fetch","bytes=900-977"]],"check":"directory-bounds fixture 4","expected":["bytes=-22",["fetch","bytes=900-977"]],"passed":true},{"actual":["bytes=-25",["fetch","bytes=900-974"]],"check":"directory-bounds fixture 5","expected":["bytes=-25",["fetch","bytes=900-974"]],"passed":true},{"actual":["bytes=-80",["local",0,18]],"check":"directory-bounds fixture 6","expected":["bytes=-80",["local",0,18]],"passed":true},{"actual":["bytes=-40",null],"check":"directory-bounds fixture 7","expected":["bytes=-40",null],"passed":true},{"actual":["bytes=-40",null],"check":"directory-bounds fixture 8","expected":["bytes=-40",null],"passed":true},{"actual":["bytes=-40",null],"check":"directory-bounds fixture 9","expected":["bytes=-40",null],"passed":true},{"actual":["bytes=-62",["local",30,20]],"check":"directory-bounds fixture 10","expected":["bytes=-62",null],"passed":false},{"actual":["bytes=-30",null],"check":"directory-bounds fixture 11","expected":["bytes=-30",null],"passed":true},{"actual":["bytes=-30",null],"check":"directory-bounds fixture 12","expected":["bytes=-30",null],"passed":true},{"actual":[null,null],"check":"directory-bounds fixture 13","expected":[null,null],"passed":true},{"actual":["bytes=-22",["local",0,0]],"check":"directory-bounds fixture 14","expected":["bytes=-22",["local",0,0]],"passed":true},{"actual":["bytes=-33",["local",0,10]],"check":"directory-bounds fixture 15","expected":["bytes=-33",["local",0,10]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"directory-bounds fixture 0\", \"actual\": [\"bytes=-60\", [\"local\", 20, 18]], \"expected\": [\"bytes=-60\", [\"local\", 20, 18]], \"passed\": true}, {\"check\": \"directory-bounds fixture 1\", \"actual\": [\"bytes=-40\", [\"local\", 0, 18]], \"expected\": [\"bytes=-40\", [\"local\", 0, 18]], \"passed\": true}, {\"check\": \"directory-bounds fixture 2\", \"actual\": [\"bytes=-50\", [\"local\", 0, 18]], \"expected\": [\"bytes=-50\", [\"local\", 0, 18]], \"passed\": true}, {\"check\": \"directory-bounds fixture 3\", \"actual\": [\"bytes=-30\", [\"fetch\", \"bytes=960-969\"]], \"expected\": [\"bytes=-30\", [\"fetch\", \"bytes=960-969\"]], \"passed\": true}, {\"check\": \"directory-bounds fixture 4\", \"actual\": [\"bytes=-22\", [\"fetch\", \"bytes=900-977\"]], \"expected\": [\"bytes=-22\", [\"fetch\", \"bytes=900-977\"]], \"passed\": true}, {\"check\": \"directory-bounds fixture 5\", \"actual\": [\"bytes=-25\", [\"fetch\", \"bytes=900-974\"]], \"expected\": [\"bytes=-25\", [\"fetch\", \"bytes=900-974\"]], \"passed\": true}, {\"check\": \"directory-bounds fixture 6\", \"actual\": [\"bytes=-80\", [\"local\", 0, 18]], \"expected\": [\"bytes=-80\", [\"local\", 0, 18]], \"passed\": true}, {\"check\": \"directory-bounds fixture 7\", \"actual\": [\"bytes=-40\", null], \"expected\": 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