But this tickled all of the things that make a bug hard to find. First of all, it had to do with concurrency and it was utterly unreproducible,. Second of all, you had some core ssumption that turned out to be false. It’s the hallmark of the tyro that they say “Yeah, well, the language is broken” or “The system is broken”. But in this case, yes, the bedrock on which I was standing was, in fact, broken.
~ Joshua Block