Handling exceptions in setWatch/setInterval

I'm thinking about adding something like error number since started. If you can detect that it is the same error/exception, then just printing the new error number with the number of first occurrence. Since the numbers is incrementing you also get a *feel of 'distance' between same errors. Using some kind of a threshold - general or per individual interval (id) when specified - and the error occurrence could trigger an event with context information (interval id? and) what is suitable and let the app handle it the application overrides a default behavior, which would be killing specific/all interval/s. (Is that a similar issue pattern you find in the browser when the user gets presented the option to choose/confirm Don't show this alert/message pop-up anymore? ? Of course, in Espruino context we do not have a user...).