FA-20721 / Assistive announcements / Open access

Pronunciation lookup folds case without a declared rule · case 01

The announcement trace violates the stated locale-snapshot contract.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Fault site: words.get(token,token) is implemented as words.get(token.lower(),token)

THE FAILURE

Fault site: words.get(token,token) is implemented as words.get(token.lower(),token)

Unsuccessful approach: The attempted repair substitutes words.get(token.upper(),token) and still violates a regression oracle.

Case contract

Configure a current language, voice, and pronunciation dictionary. Queue captures text rendered with whole whitespace-delimited token substitutions plus current language and voice. Dictionary edits affect future queues only. Remove deletes one pronunciation. Voice reset restores default without changing language. Flush speaks queued envelopes FIFO. Language switch clears dictionary. Report spoken and queued envelopes.

Why this case matters

Deterministic controlled model of assistive announcement delivery.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(events):
    lang='en'; voice='default'; words={}; q=[]; spoken=[]
    for e in events:
        if e[0]=='language': lang=e[1]; words.clear()
        elif e[0]=='voice': voice=e[1]
        elif e[0]=='define': words[e[1]]=e[2]
        elif e[0]=='remove': words.pop(e[1],None)
        elif e[0]=='reset-voice': voice='default'
        elif e[0]=='queue':
            tokens=e[1].split(' ')
            rendered=' '.join(words.get(token.lower(),token) for token in tokens)
            q.append([lang,voice,rendered])
        elif e[0]=='flush':
            spoken.extend(q)
            q.clear()
    return [spoken,q,lang,voice,sorted(words.items())]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = ["[['language','fr'],['voice','alto'],['define','AI','A I'],['queue','AI '*N],['voice','bass'],['queue','AI'],['flush'],['flush']]", "[['define','a','first'],['define','a','second'],['queue','a '*N],['flush']]", "[['define','A','upper'],['define','a','lower'],['queue','A a Aa '*N],['remove','A'],['queue','A a'],['flush']]", "[['define','a','one'],['define','b','two'],['language','de'],['queue','a b '*N],['flush']]", "[['language','fr'],['define','a','ah'],['voice','alto'],['reset-voice'],['queue','a '*N],['flush']]", "[['queue','  x  '*N],['flush']]", '[]']
expected = {1: [[[['fr', 'alto', 'A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 2: [[[['fr', 'alto', 'A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 3: [[[['fr', 'alto', 'A I A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 4: [[[['fr', 'alto', 'A I A I A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x    x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 5: [[[['fr', 'alto', 'A I A I A I A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second second second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa upper lower Aa upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b a b a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ah ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x    x    x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]]}[N]
for i, expression in enumerate(fixtures):
    check("trace-"+str(i+1), solve(eval(expression)), expected[i])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
trace-1	`[[['fr', 'alto', 'AI '], ['fr', 'bass', 'AI']], [], 'fr', 'bass', [['AI', 'A I']]]`	`[[['fr', 'alto', 'A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [['AI', 'A I']]]`	Failed
trace-2	`[[['en', 'default', 'second ']], [], 'en', 'default', [['a', 'second']]]`	`[[['en', 'default', 'second ']], [], 'en', 'default', [['a', 'second']]]`	Passed
trace-3	`[[['en', 'default', 'lower lower Aa '], ['en', 'default', 'lower lower']], [], 'en', 'default', [['a', 'lower']]]`	`[[['en', 'default', 'upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [['a', 'lower']]]`	Failed
trace-4	`[[['de', 'default', 'a b ']], [], 'de', 'default', []]`	`[[['de', 'default', 'a b ']], [], 'de', 'default', []]`	Passed
trace-5	`[[['fr', 'default', 'ah ']], [], 'fr', 'default', [['a', 'ah']]]`	`[[['fr', 'default', 'ah ']], [], 'fr', 'default', [['a', 'ah']]]`	Passed
trace-6	`[[['en', 'default', ' x ']], [], 'en', 'default', []]`	`[[['en', 'default', ' x ']], [], 'en', 'default', []]`	Passed
trace-7	`[[], [], 'en', 'default', []]`	`[[], [], 'en', 'default', []]`	Passed

SHA-256 / 1eea6fcfd4d9ba41910c24e4bda02ec0d5e405d6b21fe886b4d212dd8af06329

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(events):
    lang='en'; voice='default'; words={}; q=[]; spoken=[]
    for e in events:
        if e[0]=='language': lang=e[1]; words.clear()
        elif e[0]=='voice': voice=e[1]
        elif e[0]=='define': words[e[1]]=e[2]
        elif e[0]=='remove': words.pop(e[1],None)
        elif e[0]=='reset-voice': voice='default'
        elif e[0]=='queue':
            tokens=e[1].split(' ')
            rendered=' '.join(words.get(token.upper(),token) for token in tokens)
            q.append([lang,voice,rendered])
        elif e[0]=='flush':
            spoken.extend(q)
            q.clear()
    return [spoken,q,lang,voice,sorted(words.items())]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = ["[['language','fr'],['voice','alto'],['define','AI','A I'],['queue','AI '*N],['voice','bass'],['queue','AI'],['flush'],['flush']]", "[['define','a','first'],['define','a','second'],['queue','a '*N],['flush']]", "[['define','A','upper'],['define','a','lower'],['queue','A a Aa '*N],['remove','A'],['queue','A a'],['flush']]", "[['define','a','one'],['define','b','two'],['language','de'],['queue','a b '*N],['flush']]", "[['language','fr'],['define','a','ah'],['voice','alto'],['reset-voice'],['queue','a '*N],['flush']]", "[['queue','  x  '*N],['flush']]", '[]']
expected = {1: [[[['fr', 'alto', 'A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 2: [[[['fr', 'alto', 'A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 3: [[[['fr', 'alto', 'A I A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 4: [[[['fr', 'alto', 'A I A I A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x    x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]], 5: [[[['fr', 'alto', 'A I A I A I A I A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [('AI', 'A I')]], [[['en', 'default', 'second second second second second ']], [], 'en', 'default', [('a', 'second')]], [[['en', 'default', 'upper lower Aa upper lower Aa upper lower Aa upper lower Aa upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [('a', 'lower')]], [[['de', 'default', 'a b a b a b a b a b ']], [], 'de', 'default', []], [[['fr', 'default', 'ah ah ah ah ah ']], [], 'fr', 'default', [('a', 'ah')]], [[['en', 'default', '  x    x    x    x    x  ']], [], 'en', 'default', []], [[], [], 'en', 'default', []]]}[N]
for i, expression in enumerate(fixtures):
    check("trace-"+str(i+1), solve(eval(expression)), expected[i])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
trace-1	`[[['fr', 'alto', 'A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [['AI', 'A I']]]`	`[[['fr', 'alto', 'A I '], ['fr', 'bass', 'A I']], [], 'fr', 'bass', [['AI', 'A I']]]`	Passed
trace-2	`[[['en', 'default', 'a ']], [], 'en', 'default', [['a', 'second']]]`	`[[['en', 'default', 'second ']], [], 'en', 'default', [['a', 'second']]]`	Failed
trace-3	`[[['en', 'default', 'upper upper Aa '], ['en', 'default', 'A a']], [], 'en', 'default', [['a', 'lower']]]`	`[[['en', 'default', 'upper lower Aa '], ['en', 'default', 'A lower']], [], 'en', 'default', [['a', 'lower']]]`	Failed
trace-4	`[[['de', 'default', 'a b ']], [], 'de', 'default', []]`	`[[['de', 'default', 'a b ']], [], 'de', 'default', []]`	Passed
trace-5	`[[['fr', 'default', 'a ']], [], 'fr', 'default', [['a', 'ah']]]`	`[[['fr', 'default', 'ah ']], [], 'fr', 'default', [['a', 'ah']]]`	Failed
trace-6	`[[['en', 'default', ' x ']], [], 'en', 'default', []]`	`[[['en', 'default', ' x ']], [], 'en', 'default', []]`	Passed
trace-7	`[[], [], 'en', 'default', []]`	`[[], [], 'en', 'default', []]`	Passed

SHA-256 / 11d2c292a4851cfe11cf068fb01edac13810412e10148dbc09cb843263813299

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 7 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

Member access is invitation-based. Sign in with your invited account to inspect the repair.

Verification & scope

Stipulated bounded policy, not a browser, speech engine, platform API, or standards conformance claim. 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.

Observations recorded using Python 3.12.14 at 2026-09-29T14:40:21.915025+00:00.

Case digest / ecf4f97d6fed9f504286e2176ebd3642f9eb910b95675b702205cce0194d3f1b