SnakeYAML / yaml-cpp

Bug SquashStripeLast reported May 2026Medium Frequency

Reported: 5× across candidate reports
First seen: November 2025
Last reported: May 2026
Reported outcome: mixed

Problem Overview

You are given an unfamiliar open-source YAML parsing library (SnakeYAML in Java/Python, or yaml-cpp in C++) with one or more failing tests. Your task is to navigate the codebase, identify the root cause of each bug, and fix it. Reported bug variants include: (1) 'flag: On' cannot be parsed as…

2 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
The rest of the problem statement — full requirements, constraints, and edge cases
Approach and trade-offs — what passing candidates did, and the mistakes that sink people

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Verified Source

Every question is reconstructed from multiple independent candidate reports. Verbatim follow-ups, not invented ones.

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Interviewer Follow-ups

The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.