bug#10024: 24.0.91; save-restriction fails to restore the screen

[Johan Bockgård]

Uday S Reddy <u.s.reddy@cs.bham.ac.uk> writes:

> Yes, you guys are of course right that save-restriction shouldn't have to
> restore the screen.  However, there is an outer save-excursion in the VM
> code, which is not doing the job some of the time.  I am still trying to
> track it down so that I can construct a simple example.  (The debugger
> change is probably making it harder for me to track it down.)  Stay tuned...

But save-excursion also does not restore the window. It restores point
(etc.). If a redisplay happens inside save-excursion, the window can
scroll.