Copilot Caught 8 of 8 Diff Bugs With Rules, Missed Bugs Outside the Diff

A report describes Copilot catching 8 of 8 bugs within a code diff using rules, but 0 of 2 bugs outside it, including an overbilling case where a guard looked correct while a called function overbilled a customer by 11 days.

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Timeline · 1 report

2026-11-10 12:00 · Towards Data Science
Copilot Caught 8 of 8 Diff Bugs With Rules, 0 of 2 Outside the Diff

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