Crash: Swift/NativeDictionary.swift:792 Fatal error: Duplicate values
for key: 'imp_tú', triggered the first time a user rated a vocab card
and the in-flight example generation tried to materialise.
Root cause: VerbExampleGenerator.generate() builds a [tenseId: example]
dictionary from the model's output via Dictionary(uniqueKeysWithValues:),
which traps on duplicates. The generator's @Generable schema declares
@Guide(.count(6)) on the examples array, so the LLM is forced to return
exactly 6. The new Vocab Flashcards / Multiple Choice views called
generate(... tenseIds: ["ind_presente"]) — only one tense — which left
the model to invent the other 5 tenseIds; it duplicated 'imp_tú' and
the dictionary init trapped.
Three fixes:
Services/VerbExampleGenerator.swift — use Dictionary(_:uniquingKeysWith:)
with first-wins so the generator can never crash regardless of caller
shape.
Views/Practice/Vocab/VocabFlashcardPracticeView.swift and
Views/Practice/Vocab/VocabMultipleChoicePracticeView.swift — pass
the canonical 6-tense set (VocabExampleTenseIds.canonical, same as
VerbDetailView uses), then pick the ind_presente example for the
card. Caches all six in VerbExampleCache as a side effect.
Views/Verbs/VerbListView.swift — replace empty-string systemImage
on the Level menu Labels with "circle" so the device console isn't
spammed with "No symbol named '' found in system symbol set" every
time the user opens the filter menu.
The crash analysis I gave earlier (CloudKit schema migration of
VerbReviewCard) was wrong — device console shows the real culprit. No
CloudKit-side changes needed; the new model stays in the cloud
container.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Trey T
0af8e648fe