Indeed.

But for the record, the author has since found the issue, and in this case it indeed was a bug in the first patch that was inadvertently fixed by a later patch in the series:

https://probablydance.com/2022/09/17/finding-the-second-bug-...

You are being wayyyy too harsh - the author is clearly amazingly competent but lacked time to validate the code. This is open source software and if you want your problem diagnosed and fixed then the canonical response is to tell you to stop kvetching and to go ahead and fix it yourself.

I couldn’t diagnose or debug some intermittent faults in poor multi-threaded code (written by someone who struggles to think concurrently). I threw the code away and wrote it properly from scratch and that got rid of the data or race conditions causing the intermittent fault. I have had to fix multi-threaded code many many times because I am better than most at properly fixing it.