Errors in timers

[Lennart Borgman (gmail)]

How is errors in timers supposed to be handled? It looks like those 
errors are only seen if you set debug-on-signal.

If there are not already any better way to handle this in Emacs I think 
it would be good if something to do it was added.

Here is some test code:

  (run-with-idle-timer 1 nil
                     (lambda()
                       (lwarn 't :warning "before")
                       (let ((x (/ 1 0))))
                       (lwarn 't :warning "after")
                       ))