Release Builds Are a Different Spec: A Flag-Matrix Harness for AI C++ Patches
This story is from 2026-09-11. It is preserved in the archive; the latest stories are on the live feed.
A maintainer merged an AI-written bounds check into a small C++ parser. Debug CI compiled with -O0 , ran the unit tests, and reported success. The guard was a single assert . The production job used -O2 -DNDEBUG , so the guard disappeared, and a short buffer turned a size_t into an over-read. That…
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- 2026-09-11 15:32 · DEV Community — AI
Release Builds Are a Different Spec: A Flag-Matrix Harness for AI C++ Patches