“We copy pasted the code it generated, saw everything worked fine, tried it in production, saw it also worked, and went on our merry way.”
ChatGPT translated a SQLAlchemy model with a hardcoded ID string where a UUID generator belonged. Each of 40 backend instances let exactly one customer subscribe before every later signup collided. Daytime pushes to main reset the servers, so the bug only bit at night and took five days to find. The headline blames ChatGPT. The YC startup with no tests and direct commits to main wrote this one.