Currently, when you call emit() you can attache .catch() to the returned Promise for error handling. It has a limitation coming from Promise side as Promise can be only once resolved or rejected. But you can have multiple listeners for the event and if multiple listneres errors out then you will be notified only about the first one.

I would like to propose to have defined event name (error seems like good name and follows also similar event in the Node's EventEmitter) which would be called upon listener's error throw or rejection with the object passed with structure:

{
   event: string // name of the event of the listener that throw the error
   error: Error object
}