Feel free to point out any error in my logic:
There are huge financial incentives--tens if not hundreds of billions of dollars--for developing an LLM which can solve novel bugs. So surely there exists AI companies developing an LLM capable of doing so. If an LLM capable of solving novel bugs exists, AI companies would rush to showing it off to capture tonnes of VC money. AI companies could show off their fancy bug-fixing LLM by closing issues on public Github repos using said LLMs.
No such mythical LLM exists. We are thus left with two choices:
1. My logic is flawed or there is an alternative possibility I haven't considered.
2. The LLM capable of doing what OP asserts doesn't exist and can't be made, despite their assertion that it is trivial to fine tune and put into application.