bug#15045: Point jumps inappropriately around time of Semantic lexing

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: Barry OReilly <gundaetiapo@gmail.com>, 15045@debbugs.gnu.org,
>         "Eric M. Ludlam" <eric@siege-engine.com>, Eli Zaretskii <eliz@gnu.org>
> Date: Thu, 08 Aug 2013 14:06:28 -0400
> 
> >   sit-for(0)
> >   display-time-event-handler()
> >   apply(display-time-event-handler nil)
> >   byte-code("[snipped]" [timer apply 5 6] 4)
> >   timer-event-handler([t 20995 27860 0 60 display-time-event-handler nil 
> > nil 0])
> >   accept-process-output()
> >   semantic-c-lexer(2886 7946 nil nil)
> 
> Right, that would do it.
> What happens if you remove the calls to sit-for from time.el?

You cannot ensure redisplay without that.