FA-5208 / Exception flow / Member archive
Exception handler hierarchy: Places a broad LookupError handler before its specific subclasses · case 03
Places a broad LookupError handler before its specific subclasses and changes the required Python-language result.
Case scope
Places a broad LookupError handler before its specific subclasses and changes the required Python-language result.
Why this case matters
Runs Python standard-library language operations in a deterministic local reproducer. Literal expected answers are authored independently. Related defects share an evaluation group to avoid benchmark split leakage.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| mapping failure | "lookup" | "key" | Failed |
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