Render data from unhandled ex-info exceptions

[emlyn]

If something like (throw (ex-info "message" {:some "data"})) goes unhandled, it would be useful to be able to see the data in the error message. Currntly that is not visible:

[mk]

I've tried this but I don't see the ex-data in the viewer, does this work for you? Can you make it so it works with notebooks/boom.clj and paste a screenshot of the ex-data being shown?

[emlyn]

Sorry, I should have tested this before opening a PR...
I'm not sure how this all works, but it looks to me like the ExceptionInfo thrown in Clojure is no longer an ExceptionInfo when it gets to the ClojureScript render code. I'll try to dig into it a bit further to see if I can work out what's going on if I have the time.

[mk]

Yep, clerk catches the exception and rethrows it after running it through Throwable->map and clojure.main/ex-triage:

clerk/src/nextjournal/clerk/eval.clj

Lines 168 to 172 in 2aa4bb1

	(utils/if-bb
	(throw t)
	(let [triaged (main/ex-triage (Throwable->map t))]
	(throw (ex-info (main/ex-str triaged)
	(merge triaged (analyzer/form->ex-data form)))))))))

Since ex-data can contain things that can't be serialized or contain too much data to send over the wire, it's run through clerk's presentation.