To gather as many as possible errors/exceptions from our mod, we might consider adding some automatic report system (using try{} catch(e){}), which will send a crashlog/stacktrace to our server. The server will check for duplication and will display a "hall of fame" with the number of occurrences

It could also show a warning to a player that something went wrong, configurable to a window or a chat message

I think openeye is good enough since that exists already.