I don't disagree that exceptions in python aren't perfect and rust is probably closest of them all to getting it right (though still could be improved). I'm just saying stack traces with exceptions provide a lot of useful debugging info. IMO they're more useful then the trail of wrapped error strings in go.
exceptions vs returned errors i think is a different discussion then what im getting at here.
I disagree, adding context to errors provide exactly what is needed to debug the issue. If you don't have enough context it's your fault, and context will contain more useful info than a stack trace (like the user id which triggered the issue, or whatever is needed).
Stack traces are reserved for crashes where you didn't handle the issue properly, so you get technical info of what broke and where, but no info on what happened and why it did fail like it did.
It's one piece of information, but logging at the error location does that still. And if you have a function that's called in multiple places how do you know the path that got you into that place. If it wasn't useful we wouldn't try to recreate them with wrapped errors
You wrap errors primarily to avoid the implementation detail leak. Even where errors have stack traces, you still need to do that, as was already described earlier. What debugging advantage comes with that is merely an aded bonus (A really nice bonus, to be sure. Attaching stack traces is computationally wasteful, so it is a win to not have to include them).
You can get away with not doing that when cowboy coding scripts. Python was designed to be a scripting language, so it is understandable that in Python you don't often need to worry about it. But Go isn't a scripting language. It was quite explicitly created to be a systems language. Scripts and systems are very different types of software with very different needs and requirements. If you are stuck thinking in terms of what is appropriate for scripting, you're straight up not participating in the same thread.
> I'm just saying stack traces with exceptions provide a lot of useful debugging info.
The Go team actually did a study on exactly that; including stack traces with errors. Like you, they initially thought it would be useful (hence the study), but in the end, when the data was in, they discovered nobody ever actually used them. Meaningful errors proved to be far more useful.
Science demands replication, so if your study disagrees, let's see it. But in the absence of that, the Go study is the best we've got and it completely contradicts what you are telling us. Making random claims up on the spot based on arbitrary feelings isn't indicative of anything.
That said, I think we can all agree there is a limited place for that type of thing (although in that place you shouldn't use Go at all — there are many other languages much better suited to that type of problem space), but in that place if you had to use Go for some strange reason you'd use panic and recover which already includes the stack trace for you. The functionality is already there exactly as you desire when you do need to bend Go beyond what it is intended for.
exceptions vs returned errors i think is a different discussion then what im getting at here.