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Failsafe Debugging: Separate Null Results from Exceptions

A partially source-backed reconstruction for Stripe software-engineering preparation: repair a real historical Failsafe defect that retries an unmatched exception when null-result handling is enabled.

Java 21Spring BootJUnit 5 45 min Junior

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1 guided task
3 acceptance criteria
A saved coding workspace with AI guidance
Automated tests and a final project review

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