bug#70386: 30.0.50; (recenter 0 t) does not put point on top of the window

[Ihor Radchenko <yantar92@posteo.net>]

Eli Zaretskii <eliz@gnu.org> writes:

>> 1. emacs -Q
>> 2. Insert
>> (progn
>>   (require 'pixel-scroll)
>>   (pixel-scroll-precision-interpolate
>>    (* -1 (line-pixel-height)) nil 1)
>>   (recenter 0 t))
>> 3. Move point to "progn"
>> 4. M-x eval-buffer
>
> Still unpredictable.  Sometimes point ends up on progn with
> window-start being 1 as at the beginning, sometimes I see the
> "recenter" line at the top line with point at EOB (i.e. below that
> line).

Ok. I can see what might be going on here - M-x eval-buffer
moves the point before evaluation, causing this weird behavior.

If I convert my recipe to a defun, there is no problem.

I am still seeing weirdness on my side though with Emacs entering a
state when calling M-: (recenter -1 t) does nothing even when the buffer
should be scrolled (point not near the top of buffer). But I am unable
to get a reliable reproducer. Feel free to close this bug report.

-- 
Ihor Radchenko // yantar92,
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