TIL:
console.log(JSON.stringify(new Set(["bla", "foo"])))
prints
{}
which does not mean that the set was empty.
ChatGPT found it after three rounds of finding errors that were no errors at all and
> I apologize for the confusion. Upon further inspection, I see another issue in the code.
Array.from(new Set()) will fix it
The fix was not the hard part. Just not using JSON.stringify() was good enough. The problem was that I had empty sets for other reasons so I tested just those 20 LOC with a console.log in the end and I was scratching my head for half an hour why the set was empty all the time.
