edit: I found Snooze (by Sly and Yasnippet’s author) easier and cleaner in this regard. It also has built-in settings to choose where to catch errors: with Slime’s debugger, with a full stacktrace in the browser or displaying a custom error page. If you’re using Lucerne don’t search more like I did, its with-params macro works with url query parameters (as well as POST parameters). If you’re accessing the url hello?
