{"abstract":"Quoted-printable soft line breaks become content.","category":"Encodings","checks":4,"contract":"Decode quoted-printable ASCII text to Latin-1 text.","contract_signature":"x","evaluation_group":"model-6c769640a893b612","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-quoted-printable-soft-break","id":"FA-3336","implementations":{"attempt":{"sha256":"69c17369cfa0270a594b8ac2ea0c9324d48f942c3c8ab2ce718f8259a5438a78","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport re, unicodedata, json, csv, io, html, base64, binascii, codecs, struct\nfrom urllib.parse import quote, unquote, unquote_to_bytes, urlencode, parse_qsl, urlsplit, urlunsplit\nfrom email.header import decode_header, make_header\nfrom email.utils import getaddresses\nfrom xml.etree import ElementTree as ET\nimport shlex, string, textwrap\n\nN = 1\nobservations = []\ndef solve(x):\n    try:\n        return binascii.a2b_qp(x.replace('=\\n','\\n')).decode('latin1')\n    except Exception as exc:\n        return {\"error\": type(exc).__name__}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('boundary 1', solve('ab=\\ncd'), 'abcd')\ncheck('boundary 2', solve('=E9'), 'é')\ncheck('boundary 3', solve('a=20b'), 'a b')\ncheck('boundary 4', solve('plain'), 'plain')\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":"bdd516cbd9c875662af7b9e3fb5a91793d409cb61b19ce1e8028bdbeba30dbff","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport re, unicodedata, json, csv, io, html, base64, binascii, codecs, struct\nfrom urllib.parse import quote, unquote, unquote_to_bytes, urlencode, parse_qsl, urlsplit, urlunsplit\nfrom email.header import decode_header, make_header\nfrom email.utils import getaddresses\nfrom xml.etree import ElementTree as ET\nimport shlex, string, textwrap\n\nN = 1\nobservations = []\ndef solve(x):\n    try:\n        return x.replace('=20',' ')\n    except Exception as exc:\n        return {\"error\": type(exc).__name__}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('boundary 1', solve('ab=\\ncd'), 'abcd')\ncheck('boundary 2', solve('=E9'), 'é')\ncheck('boundary 3', solve('a=20b'), 'a b')\ncheck('boundary 4', solve('plain'), 'plain')\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":" 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":"xp-quoted-printable-soft-break","generated_at":"2026-09-29T14:37:24.454485+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"A local executable model for consumers of structured text; oracle values are authored literals, not outputs copied from the repaired implementation.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Decode quoted-printable ASCII text to Latin-1 text.","sha256":"6a143717343565eb26eff015966abef416e4916911736c47d1ddb263d3b93af5","title":"Quoted-printable soft line breaks become content · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":57.668,"exit_code":1,"observations":[{"actual":"ab\ncd","check":"boundary 1","expected":"abcd","passed":false},{"actual":"é","check":"boundary 2","expected":"é","passed":true},{"actual":"a b","check":"boundary 3","expected":"a b","passed":true},{"actual":"plain","check":"boundary 4","expected":"plain","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"ab\\ncd\", \"expected\": \"abcd\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"é\", \"expected\": \"é\", \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": \"a b\", \"expected\": \"a b\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"plain\", \"expected\": \"plain\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":52.592,"exit_code":1,"observations":[{"actual":"ab=\ncd","check":"boundary 1","expected":"abcd","passed":false},{"actual":"=E9","check":"boundary 2","expected":"é","passed":false},{"actual":"a b","check":"boundary 3","expected":"a b","passed":true},{"actual":"plain","check":"boundary 4","expected":"plain","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"ab=\\ncd\", \"expected\": \"abcd\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"=E9\", \"expected\": \"é\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"a b\", \"expected\": \"a b\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"plain\", \"expected\": \"plain\", \"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."}}