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bug#12170: save-excursion fails boundary case with recenter


From: Eli Zaretskii
Subject: bug#12170: save-excursion fails boundary case with recenter
Date: Sat, 11 Aug 2012 19:31:53 +0300

> Date: Sat, 11 Aug 2012 18:05:14 +0200
> From: martin rudalics <address@hidden>
> CC: address@hidden, address@hidden
> 
> So the difference should be in one of the four assignments
> 
>    w->start_at_line_beg = 0;
>    w->update_mode_line = 1;
>    w->last_modified = 0;
>    w->last_overlay_modified = 0;
> 
> and I'd obviously vote for the first one.  Interesting side-effect.

FWIW, there are only 2 places in redisplay that look at
w->start_at_line_beg, but neither your nor Bill's recipe don't
exercise the code of either of these two places.





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