Hi,

since some time, `timer-event-handler' messages error messages in case
of errors (when debug-on-error is nil).  This is good!

However, in my experience these messages as such are currently not very
helpful.  E.g I get a message like

|  Error running timer: (error "Selecting deleted buffer")

Mmh.

I can try setting `debug-on-error' to t (which is a pain in the
ass as long as `user-error' is not very widespread, btw) and hope that
it "happens again".  But it would be better if the message would be more
informative.  E.g. we would win a lot with doing this: