{"abstract":"Valid short fractions such as ,5 are rejected while the file loads with missing cues.","category":"Subtitle cue timing","checks":8,"contract":"Parse an SRT timestamp HH:MM:SS,mmm to integer milliseconds. Hours have 2 or more digits, minutes and seconds are below 60, the fraction has 1 to 3 digits and is right-padded (\",5\" means 500 ms), \".\" is accepted as the separator, surrounding whitespace (including a CR from CRLF files) is ignored; invalid text returns None.","evaluation_group":"w2-subtitle-cue-timing-srt-parse","failed_approach":"Rejecting fractions of three or more digits now refuses the canonical ,mmm form.","family":"w2-subtitle-cue-timing-srt-parse-fraction-digit-limit","id":"FA-77856","implementations":{"attempt":{"sha256":"9b5138cef2f0d977b9599a725a8c71378876a899ff50ab53e9c681622d8d8190","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(s):\n    s=s.strip()\n    parts=s.replace('.',',').split(',')\n    if len(parts)!=2: return None\n    hms,frac=parts\n    fields=hms.split(':')\n    if len(fields)!=3: return None\n    if not all(p.isdigit() for p in fields) or not frac.isdigit(): return None\n    if len(frac)>=3: return None\n    h,mi,se=int(fields[0]),int(fields[1]),int(fields[2])\n    if mi>=60 or se>=60: return None\n    ms=int(frac.ljust(3,'0'))\n    return h*3600000+mi*60000+se*1000+ms\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('regression: fraction digit limit', ['00:00:01,5'], 1500), ('regression variant: fraction digit limit', [' 100:00:00,07'], 360000070), ('partial repair probe: fraction digit limit', ['00:59:59,999\\r'], 3599999), ('partial repair variant: fraction digit limit', ['01:05:00,500\\r'], 3900500), ('boundary control', ['00:60:00,000'], None), ('normal control', ['00:61:00;5 \\r'], None), ('normal control', ['123:60:59,5'], None), ('normal control', ['99:30:42.1234\\r'], None)], [('regression: fraction digit limit', [' 00:05:00.5 '], 300500), ('regression variant: fraction digit limit', [' 100:00:01.50\\r'], 360001500), ('partial repair probe: fraction digit limit', ['100:00:00,000'], 360000000), ('partial repair variant: fraction digit limit', ['100:30:42,500\\r'], 361842500), ('boundary control', ['00:60:00,000'], None), ('normal control', [' 00:61:01;999\\r'], None), ('normal control', ['123:60:42,999'], None), ('normal control', [' 10:00:61.001\\r'], None)], [('regression: fraction digit limit', ['02:30:42,5\\t'], 9042500), ('regression variant: fraction digit limit', [' 100:59:59,12'], 363599120), ('partial repair probe: fraction digit limit', ['99:00:00.500\\r'], 356400500), ('partial repair variant: fraction digit limit', ['123:05:01,001\\t'], 443101001), ('boundary control', ['00:60:00,000'], None), ('normal control', ['10:60:60,07 '], None), ('normal control', ['00:00:60,07'], None), ('normal control', [' 00:61:42,000'], None)], [('regression: fraction digit limit', ['00:30:59,12 '], 1859120), ('regression variant: fraction digit limit', ['02:59:42,12 '], 10782120), ('partial repair probe: fraction digit limit', ['99:00:59,001 \\r'], 356459001), ('partial repair variant: fraction digit limit', ['100:59:42.001\\r'], 363582001), ('boundary control', ['00:60:00,000'], None), ('normal control', ['100:60:60,999 '], None), ('normal control', ['123:00:61,001 \\r'], None), ('normal control', [' 99:60:60, '], None)], [('regression: fraction digit limit', [' 123:59:42,50 '], 446382500), ('regression variant: fraction digit limit', ['10:30:59,12\\t'], 37859120), ('partial repair probe: fraction digit limit', ['00:59:00.000'], 3540000), ('partial repair variant: fraction digit limit', ['10:05:42,000 '], 36342000), ('boundary control', ['00:60:00,000'], None), ('normal control', [' 100:59:61,50'], None), ('normal control', ['00:61:01;12 \\r'], None), ('normal control', [' 00:60:59, '], None)]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\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":"619164e92215569fd21ccb02726ac296e9795c6df0d8700e25c779e684136d68","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(s):\n    s=s.strip()\n    parts=s.replace('.',',').split(',')\n    if len(parts)!=2: return None\n    hms,frac=parts\n    fields=hms.split(':')\n    if len(fields)!=3: return None\n    if not all(p.isdigit() for p in fields) or not frac.isdigit(): return None\n    if len(frac)!=3: return None\n    h,mi,se=int(fields[0]),int(fields[1]),int(fields[2])\n    if mi>=60 or se>=60: return None\n    ms=int(frac.ljust(3,'0'))\n    return h*3600000+mi*60000+se*1000+ms\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('regression: fraction digit limit', ['00:00:01,5'], 1500), ('regression variant: fraction digit limit', [' 100:00:00,07'], 360000070), ('partial repair probe: fraction digit limit', ['00:59:59,999\\r'], 3599999), ('partial repair variant: fraction digit limit', ['01:05:00,500\\r'], 3900500), ('boundary control', ['00:60:00,000'], None), ('normal control', ['00:61:00;5 \\r'], None), ('normal control', ['123:60:59,5'], None), ('normal control', ['99:30:42.1234\\r'], None)], [('regression: fraction digit limit', [' 00:05:00.5 '], 300500), ('regression variant: fraction digit limit', [' 100:00:01.50\\r'], 360001500), ('partial repair probe: fraction digit limit', ['100:00:00,000'], 360000000), ('partial repair variant: fraction digit limit', ['100:30:42,500\\r'], 361842500), ('boundary control', ['00:60:00,000'], None), ('normal control', [' 00:61:01;999\\r'], None), ('normal control', ['123:60:42,999'], None), ('normal control', [' 10:00:61.001\\r'], None)], [('regression: fraction digit limit', ['02:30:42,5\\t'], 9042500), ('regression variant: fraction digit limit', [' 100:59:59,12'], 363599120), ('partial repair probe: fraction digit limit', ['99:00:00.500\\r'], 356400500), ('partial repair variant: fraction digit limit', ['123:05:01,001\\t'], 443101001), ('boundary control', ['00:60:00,000'], None), ('normal control', ['10:60:60,07 '], None), ('normal control', ['00:00:60,07'], None), ('normal control', [' 00:61:42,000'], None)], [('regression: fraction digit limit', ['00:30:59,12 '], 1859120), ('regression variant: fraction digit limit', ['02:59:42,12 '], 10782120), ('partial repair probe: fraction digit limit', ['99:00:59,001 \\r'], 356459001), ('partial repair variant: fraction digit limit', ['100:59:42.001\\r'], 363582001), ('boundary control', ['00:60:00,000'], None), ('normal control', ['100:60:60,999 '], None), ('normal control', ['123:00:61,001 \\r'], None), ('normal control', [' 99:60:60, '], None)], [('regression: fraction digit limit', [' 123:59:42,50 '], 446382500), ('regression variant: fraction digit limit', ['10:30:59,12\\t'], 37859120), ('partial repair probe: fraction digit limit', ['00:59:00.000'], 3540000), ('partial repair variant: fraction digit limit', ['10:05:42,000 '], 36342000), ('boundary control', ['00:60:00,000'], None), ('normal control', [' 100:59:61,50'], None), ('normal control', ['00:61:01;12 \\r'], None), ('normal control', [' 00:60:59, '], None)]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\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":"a0822e79f820820c7d419acea9899464727c687e85a7cb913767a9b1f3cab3b8","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(s):\n    s=s.strip()\n    parts=s.replace('.',',').split(',')\n    if len(parts)!=2: return None\n    hms,frac=parts\n    fields=hms.split(':')\n    if len(fields)!=3: return None\n    if not all(p.isdigit() for p in fields) or not frac.isdigit(): return None\n    if len(frac)>3: return None\n    h,mi,se=int(fields[0]),int(fields[1]),int(fields[2])\n    if mi>=60 or se>=60: return None\n    ms=int(frac.ljust(3,'0'))\n    return h*3600000+mi*60000+se*1000+ms\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('regression: fraction digit limit', ['00:00:01,5'], 1500), ('regression variant: fraction digit limit', [' 100:00:00,07'], 360000070), ('partial repair probe: fraction digit limit', ['00:59:59,999\\r'], 3599999), ('partial repair variant: fraction digit limit', ['01:05:00,500\\r'], 3900500), ('boundary control', ['00:60:00,000'], None), ('normal control', ['00:61:00;5 \\r'], None), ('normal control', ['123:60:59,5'], None), ('normal control', ['99:30:42.1234\\r'], None)], [('regression: fraction digit limit', [' 00:05:00.5 '], 300500), ('regression variant: fraction digit limit', [' 100:00:01.50\\r'], 360001500), ('partial repair probe: fraction digit limit', ['100:00:00,000'], 360000000), ('partial repair variant: fraction digit limit', ['100:30:42,500\\r'], 361842500), ('boundary control', ['00:60:00,000'], None), ('normal control', [' 00:61:01;999\\r'], None), ('normal control', ['123:60:42,999'], None), ('normal control', [' 10:00:61.001\\r'], None)], [('regression: fraction digit limit', ['02:30:42,5\\t'], 9042500), ('regression variant: fraction digit limit', [' 100:59:59,12'], 363599120), ('partial repair probe: fraction digit limit', ['99:00:00.500\\r'], 356400500), ('partial repair variant: fraction digit limit', ['123:05:01,001\\t'], 443101001), ('boundary control', ['00:60:00,000'], None), ('normal control', ['10:60:60,07 '], None), ('normal control', ['00:00:60,07'], None), ('normal control', [' 00:61:42,000'], None)], [('regression: fraction digit limit', ['00:30:59,12 '], 1859120), ('regression variant: fraction digit limit', ['02:59:42,12 '], 10782120), ('partial repair probe: fraction digit limit', ['99:00:59,001 \\r'], 356459001), ('partial repair variant: fraction digit limit', ['100:59:42.001\\r'], 363582001), ('boundary control', ['00:60:00,000'], None), ('normal control', ['100:60:60,999 '], None), ('normal control', ['123:00:61,001 \\r'], None), ('normal control', [' 99:60:60, '], None)], [('regression: fraction digit limit', [' 123:59:42,50 '], 446382500), ('regression variant: fraction digit limit', ['10:30:59,12\\t'], 37859120), ('partial repair probe: fraction digit limit', ['00:59:00.000'], 3540000), ('partial repair variant: fraction digit limit', ['10:05:42,000 '], 36342000), ('boundary control', ['00:60:00,000'], None), ('normal control', [' 100:59:61,50'], None), ('normal control', ['00:61:01;12 \\r'], None), ('normal control', [' 00:60:59, '], None)]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(*args), expected)\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":"A deterministic bounded teaching model with a stipulated toy contract; it does not claim conformance to any subtitle standard. 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":"w2-subtitle-cue-timing-srt-parse-fraction-digit-limit","generated_at":"2026-09-29T14:49:29.926822+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Subtitle timing defects shift, hide or overlap captions that viewers depend on for comprehension and accessibility.","repair":"Only reject fractions longer than three digits.","root_cause":"The fraction length rule requires exactly three digits, contradicting the 1 to 3 digit contract.","sha256":"a88159607a128dc088e67f7b03a48322589f30f3b93d2c2b4208e4bfaa1a8a29","title":"SRT timestamp parsing: fraction digit limit · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":38.96,"exit_code":1,"observations":[{"actual":1500,"check":"regression: fraction digit limit","expected":1500,"passed":true},{"actual":360000070,"check":"regression variant: fraction digit limit","expected":360000070,"passed":true},{"actual":null,"check":"partial repair probe: fraction digit limit","expected":3599999,"passed":false},{"actual":null,"check":"partial repair variant: fraction digit limit","expected":3900500,"passed":false},{"actual":null,"check":"boundary control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: fraction digit limit\", \"actual\": 1500, \"expected\": 1500, \"passed\": true}, {\"check\": \"regression variant: fraction digit limit\", \"actual\": 360000070, \"expected\": 360000070, \"passed\": true}, {\"check\": \"partial repair probe: fraction digit limit\", \"actual\": null, \"expected\": 3599999, \"passed\": false}, {\"check\": \"partial repair variant: fraction digit limit\", \"actual\": null, \"expected\": 3900500, \"passed\": false}, {\"check\": \"boundary control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.389,"exit_code":1,"observations":[{"actual":null,"check":"regression: fraction digit limit","expected":1500,"passed":false},{"actual":null,"check":"regression variant: fraction digit limit","expected":360000070,"passed":false},{"actual":3599999,"check":"partial repair probe: fraction digit limit","expected":3599999,"passed":true},{"actual":3900500,"check":"partial repair variant: fraction digit limit","expected":3900500,"passed":true},{"actual":null,"check":"boundary control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: fraction digit limit\", \"actual\": null, \"expected\": 1500, \"passed\": false}, {\"check\": \"regression variant: fraction digit limit\", \"actual\": null, \"expected\": 360000070, \"passed\": false}, {\"check\": \"partial repair probe: fraction digit limit\", \"actual\": 3599999, \"expected\": 3599999, \"passed\": true}, {\"check\": \"partial repair variant: fraction digit limit\", \"actual\": 3900500, \"expected\": 3900500, \"passed\": true}, {\"check\": \"boundary control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":40.923,"exit_code":0,"observations":[{"actual":1500,"check":"regression: fraction digit limit","expected":1500,"passed":true},{"actual":360000070,"check":"regression variant: fraction digit limit","expected":360000070,"passed":true},{"actual":3599999,"check":"partial repair probe: fraction digit limit","expected":3599999,"passed":true},{"actual":3900500,"check":"partial repair variant: fraction digit limit","expected":3900500,"passed":true},{"actual":null,"check":"boundary control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true},{"actual":null,"check":"normal control","expected":null,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"regression: fraction digit limit\", \"actual\": 1500, \"expected\": 1500, \"passed\": true}, {\"check\": \"regression variant: fraction digit limit\", \"actual\": 360000070, \"expected\": 360000070, \"passed\": true}, {\"check\": \"partial repair probe: fraction digit limit\", \"actual\": 3599999, \"expected\": 3599999, \"passed\": true}, {\"check\": \"partial repair variant: fraction digit limit\", \"actual\": 3900500, \"expected\": 3900500, \"passed\": true}, {\"check\": \"boundary control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}, {\"check\": \"normal control\", \"actual\": null, \"expected\": null, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}