{"abstract":"Outdated semantic property updates overwrite current values.","category":"Accessibility interaction semantics","checks":6,"contract":"Input [initial,revision,updates]. Updates [base_revision,next_revision,changes] apply atomically only if base matches current and next is greater; updates cannot change immutable id or role. Allowed dynamic keys name,description,value,help,language; unknown keys reject whole update. None deletes a property, empty string is retained; values must be strings or None. Return [state,revision,accepted_flags]. Copy initial. Revision advances even for no-op changes.","evaluation_group":"s3-accessibility-property-patch","failed_approach":"The local repair substitutes base != revision but still mishandles the regression fixtures.","family":"s3-accessibility-property-patch-base-revision","id":"FA-53956","implementations":{"attempt":{"sha256":"1a2c52a947f0e66657488309b28cf922cbee2a4d295628f263429cf65c86709f","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(data):\n    initial,revision,updates = data\n    state = dict(initial)\n    accepted = []\n    for base,nxt,changes in updates:\n        valid = base != revision and nxt > base\n        valid = valid and all(k in {'name','description','value','help','language'} for k in changes)\n        valid = valid and all(v is None or isinstance(v,str) for v in changes.values())\n        accepted.append(valid)\n        if not valid: continue\n        for key,value in changes.items():\n            if value is None: state.pop(key,None)\n            else: state[key] = value\n        revision = nxt\n    return [state,revision,accepted]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('contract fixture 1', solve([{'id':'x','role':'image','name':'old'},N,[[N,N+1,{'name':'new','help':''}],[N,N+2,{'name':'stale'}]]],), [{'id':'x','role':'image','name':'new','help':''},N+1,[True,False]])\ncheck('contract fixture 2', solve([{'name':'x','help':'h'},N,[[N,N+1,{'name':None}],[N+1,N+2,{'absent':'bad','help':'bad'}]]],), [{'help':'h'},N+1,[True,False]])\ncheck('contract fixture 3', solve([{'id':'x','role':'image'},N,[[N,N+1,{'id':'y'}],[N,N+1,{'role':'button'}]]],), [{'id':'x','role':'image'},N,[False,False]])\ncheck('contract fixture 4', solve([{},N,[[N,N,{'name':'bad'}],[N,N-1,{}],[N,N+1,{}]]],), [{},N+1,[False,False,True]])\ncheck('contract fixture 5', solve([{'name':'x'},N,[[N,N+1,{'name':42,'help':'partial'}]]],), [{'name':'x'},N,[False]])\ncheck('contract fixture 6', solve([{},N,[[N,N+1,{'name':None,'description':'D','value':'0','language':'en'}]]],), [{'description':'D','value':'0','language':'en'},N+1,[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":"ac60bdce4ca36904ad70ecf3f3fc976faea7aed3f5a1b8c7800dc42517778ea9","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(data):\n    initial,revision,updates = data\n    state = dict(initial)\n    accepted = []\n    for base,nxt,changes in updates:\n        valid = base <= revision and nxt > base\n        valid = valid and all(k in {'name','description','value','help','language'} for k in changes)\n        valid = valid and all(v is None or isinstance(v,str) for v in changes.values())\n        accepted.append(valid)\n        if not valid: continue\n        for key,value in changes.items():\n            if value is None: state.pop(key,None)\n            else: state[key] = value\n        revision = nxt\n    return [state,revision,accepted]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('contract fixture 1', solve([{'id':'x','role':'image','name':'old'},N,[[N,N+1,{'name':'new','help':''}],[N,N+2,{'name':'stale'}]]],), [{'id':'x','role':'image','name':'new','help':''},N+1,[True,False]])\ncheck('contract fixture 2', solve([{'name':'x','help':'h'},N,[[N,N+1,{'name':None}],[N+1,N+2,{'absent':'bad','help':'bad'}]]],), [{'help':'h'},N+1,[True,False]])\ncheck('contract fixture 3', solve([{'id':'x','role':'image'},N,[[N,N+1,{'id':'y'}],[N,N+1,{'role':'button'}]]],), [{'id':'x','role':'image'},N,[False,False]])\ncheck('contract fixture 4', solve([{},N,[[N,N,{'name':'bad'}],[N,N-1,{}],[N,N+1,{}]]],), [{},N+1,[False,False,True]])\ncheck('contract fixture 5', solve([{'name':'x'},N,[[N,N+1,{'name':42,'help':'partial'}]]],), [{'name':'x'},N,[False]])\ncheck('contract fixture 6', solve([{},N,[[N,N+1,{'name':None,'description':'D','value':'0','language':'en'}]]],), [{'description':'D','value':'0','language':'en'},N+1,[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"},"fixed":{"sha256":"e836cfeb44c22eca60a1d6b283eda71036ee37515667f299af7e63105eb875ae","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(data):\n    initial,revision,updates = data\n    state = dict(initial)\n    accepted = []\n    for base,nxt,changes in updates:\n        valid = base == revision and nxt > base\n        valid = valid and all(k in {'name','description','value','help','language'} for k in changes)\n        valid = valid and all(v is None or isinstance(v,str) for v in changes.values())\n        accepted.append(valid)\n        if not valid: continue\n        for key,value in changes.items():\n            if value is None: state.pop(key,None)\n            else: state[key] = value\n        revision = nxt\n    return [state,revision,accepted]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('contract fixture 1', solve([{'id':'x','role':'image','name':'old'},N,[[N,N+1,{'name':'new','help':''}],[N,N+2,{'name':'stale'}]]],), [{'id':'x','role':'image','name':'new','help':''},N+1,[True,False]])\ncheck('contract fixture 2', solve([{'name':'x','help':'h'},N,[[N,N+1,{'name':None}],[N+1,N+2,{'absent':'bad','help':'bad'}]]],), [{'help':'h'},N+1,[True,False]])\ncheck('contract fixture 3', solve([{'id':'x','role':'image'},N,[[N,N+1,{'id':'y'}],[N,N+1,{'role':'button'}]]],), [{'id':'x','role':'image'},N,[False,False]])\ncheck('contract fixture 4', solve([{},N,[[N,N,{'name':'bad'}],[N,N-1,{}],[N,N+1,{}]]],), [{},N+1,[False,False,True]])\ncheck('contract fixture 5', solve([{'name':'x'},N,[[N,N+1,{'name':42,'help':'partial'}]]],), [{'name':'x'},N,[False]])\ncheck('contract fixture 6', solve([{},N,[[N,N+1,{'name':None,'description':'D','value':'0','language':'en'}]]],), [{'description':'D','value':'0','language':'en'},N+1,[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 finite adapter contract, not a claim of platform accessibility or ARIA conformance. 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-accessibility-property-patch-base-revision","generated_at":"2026-09-29T14:45:43.908500+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Offline accessibility bridge model with explicit policy; useful for testing semantic API adapters independently of browser implementations.","repair":"Apply the exact contract at the base revision decision: base == revision","root_cause":"The base revision decision in the property patch adapter violates its declared contract.","sha256":"00fa4bf247ea5866898a1c89cf9cb34ad86c7625e0b2a454c54bee046a18276a","title":"Outdated semantic property updates overwrite current values · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":42.881,"exit_code":1,"observations":[{"actual":[{"id":"x","name":"old","role":"image"},1,[false,false]],"check":"contract fixture 1","expected":[{"help":"","id":"x","name":"new","role":"image"},2,[true,false]],"passed":false},{"actual":[{"help":"h","name":"x"},1,[false,false]],"check":"contract fixture 2","expected":[{"help":"h"},2,[true,false]],"passed":false},{"actual":[{"id":"x","role":"image"},1,[false,false]],"check":"contract fixture 3","expected":[{"id":"x","role":"image"},1,[false,false]],"passed":true},{"actual":[{},1,[false,false,false]],"check":"contract fixture 4","expected":[{},2,[false,false,true]],"passed":false},{"actual":[{"name":"x"},1,[false]],"check":"contract fixture 5","expected":[{"name":"x"},1,[false]],"passed":true},{"actual":[{},1,[false]],"check":"contract fixture 6","expected":[{"description":"D","language":"en","value":"0"},2,[true]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"contract fixture 1\", \"actual\": [{\"id\": \"x\", \"role\": \"image\", \"name\": \"old\"}, 1, [false, false]], \"expected\": [{\"id\": \"x\", \"role\": \"image\", \"name\": \"new\", \"help\": \"\"}, 2, [true, false]], \"passed\": false}, {\"check\": \"contract fixture 2\", \"actual\": [{\"name\": \"x\", \"help\": \"h\"}, 1, [false, false]], \"expected\": [{\"help\": \"h\"}, 2, [true, false]], \"passed\": false}, {\"check\": \"contract fixture 3\", \"actual\": [{\"id\": \"x\", \"role\": \"image\"}, 1, [false, false]], \"expected\": [{\"id\": \"x\", \"role\": \"image\"}, 1, [false, false]], \"passed\": true}, {\"check\": \"contract fixture 4\", \"actual\": [{}, 1, [false, false, false]], \"expected\": [{}, 2, [false, false, true]], \"passed\": false}, {\"check\": \"contract fixture 5\", \"actual\": [{\"name\": \"x\"}, 1, [false]], \"expected\": [{\"name\": \"x\"}, 1, [false]], \"passed\": true}, {\"check\": \"contract fixture 6\", \"actual\": [{}, 1, [false]], \"expected\": [{\"description\": \"D\", \"value\": \"0\", \"language\": \"en\"}, 2, [true]], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":44.912,"exit_code":1,"observations":[{"actual":[{"help":"","id":"x","name":"stale","role":"image"},3,[true,true]],"check":"contract fixture 1","expected":[{"help":"","id":"x","name":"new","role":"image"},2,[true,false]],"passed":false},{"actual":[{"help":"h"},2,[true,false]],"check":"contract fixture 2","expected":[{"help":"h"},2,[true,false]],"passed":true},{"actual":[{"id":"x","role":"image"},1,[false,false]],"check":"contract fixture 3","expected":[{"id":"x","role":"image"},1,[false,false]],"passed":true},{"actual":[{},2,[false,false,true]],"check":"contract fixture 4","expected":[{},2,[false,false,true]],"passed":true},{"actual":[{"name":"x"},1,[false]],"check":"contract fixture 5","expected":[{"name":"x"},1,[false]],"passed":true},{"actual":[{"description":"D","language":"en","value":"0"},2,[true]],"check":"contract fixture 6","expected":[{"description":"D","language":"en","value":"0"},2,[true]],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"contract fixture 1\", \"actual\": [{\"id\": \"x\", \"role\": \"image\", \"name\": \"stale\", \"help\": \"\"}, 3, [true, true]], \"expected\": [{\"id\": \"x\", \"role\": \"image\", \"name\": \"new\", \"help\": \"\"}, 2, [true, false]], \"passed\": false}, {\"check\": \"contract fixture 2\", \"actual\": [{\"help\": \"h\"}, 2, [true, false]], \"expected\": [{\"help\": \"h\"}, 2, [true, false]], \"passed\": true}, {\"check\": \"contract fixture 3\", \"actual\": [{\"id\": \"x\", \"role\": \"image\"}, 1, [false, false]], \"expected\": [{\"id\": \"x\", \"role\": \"image\"}, 1, [false, false]], \"passed\": true}, {\"check\": \"contract fixture 4\", \"actual\": [{}, 2, [false, false, true]], \"expected\": [{}, 2, [false, false, true]], \"passed\": true}, {\"check\": \"contract fixture 5\", \"actual\": [{\"name\": \"x\"}, 1, [false]], \"expected\": [{\"name\": \"x\"}, 1, [false]], \"passed\": true}, {\"check\": \"contract fixture 6\", \"actual\": [{\"description\": \"D\", \"value\": \"0\", \"language\": \"en\"}, 2, [true]], \"expected\": [{\"description\": \"D\", \"value\": \"0\", \"language\": \"en\"}, 2, [true]], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":40.838,"exit_code":0,"observations":[{"actual":[{"help":"","id":"x","name":"new","role":"image"},2,[true,false]],"check":"contract fixture 1","expected":[{"help":"","id":"x","name":"new","role":"image"},2,[true,false]],"passed":true},{"actual":[{"help":"h"},2,[true,false]],"check":"contract fixture 2","expected":[{"help":"h"},2,[true,false]],"passed":true},{"actual":[{"id":"x","role":"image"},1,[false,false]],"check":"contract fixture 3","expected":[{"id":"x","role":"image"},1,[false,false]],"passed":true},{"actual":[{},2,[false,false,true]],"check":"contract fixture 4","expected":[{},2,[false,false,true]],"passed":true},{"actual":[{"name":"x"},1,[false]],"check":"contract fixture 5","expected":[{"name":"x"},1,[false]],"passed":true},{"actual":[{"description":"D","language":"en","value":"0"},2,[true]],"check":"contract fixture 6","expected":[{"description":"D","language":"en","value":"0"},2,[true]],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"contract fixture 1\", \"actual\": [{\"id\": \"x\", \"role\": \"image\", \"name\": \"new\", \"help\": \"\"}, 2, [true, false]], \"expected\": [{\"id\": \"x\", \"role\": \"image\", \"name\": \"new\", \"help\": \"\"}, 2, [true, false]], \"passed\": true}, {\"check\": \"contract fixture 2\", \"actual\": [{\"help\": \"h\"}, 2, [true, false]], \"expected\": [{\"help\": \"h\"}, 2, [true, false]], \"passed\": true}, {\"check\": \"contract fixture 3\", \"actual\": [{\"id\": \"x\", \"role\": \"image\"}, 1, [false, false]], \"expected\": [{\"id\": \"x\", \"role\": \"image\"}, 1, [false, false]], \"passed\": true}, {\"check\": \"contract fixture 4\", \"actual\": [{}, 2, [false, false, true]], \"expected\": [{}, 2, [false, false, true]], \"passed\": true}, {\"check\": \"contract fixture 5\", \"actual\": [{\"name\": \"x\"}, 1, [false]], \"expected\": [{\"name\": \"x\"}, 1, [false]], \"passed\": true}, {\"check\": \"contract fixture 6\", \"actual\": [{\"description\": \"D\", \"value\": \"0\", \"language\": \"en\"}, 2, [true]], \"expected\": [{\"description\": \"D\", \"value\": \"0\", \"language\": \"en\"}, 2, [true]], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}