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If the LLM hallucinates a Python package, someone else might notice that and sneak in a malicious version of that hallucinated package.

Or if it hallucinates a method name, it might be in a code path that goes untested. How often are people using these tools to also write comprehensive test suites?

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Like I said, you have to put the work in if you're going to use these tools effectively. I write a LOT of tests both with and without the help of LLMs. I try hard never to leave any code path from an LLM (or from code I write myself) untested - always manually and usually through automated tests too.

If you don't do that, the chances LLM-generated code will introduce weird bugs are high. But the chances you yourself (or your coworkers) will introduce weird bugs are high as well - QA, code reviews and testing are important no matter what helped write the code.

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