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

[Eli Zaretskii]

> From: David Engster <deng@randomsample.de>
> Cc: Stefan Monnier <monnier@iro.umontreal.ca>,  15045@debbugs.gnu.org,  "Eric 
> M. Ludlam" <eric@siege-engine.com>,  Eli Zaretskii <eliz@gnu.org>
> Date: Thu, 08 Aug 2013 22:30:26 +0200
> 
> However, doing redisplay in timers is not nice.

Why not?

> > Doesn't deferred jit locking necessarily have to call redisplay?
> 
> I would think so, too.

But since jit-lock-deferred-fontify only happens when Emacs is idle,
there's no problem with that, since Emacs enters redisplay also when
it is idle.