bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning

[Vincent Lefevre]

On 2020-10-30 23:09:00 +0200, Eli Zaretskii wrote:
> Alternatively, someone else who can reproduce this are welcome to
> debug this and propose analysis and/or fix.

Perhaps you could give some indication.

FYI, with the culprit font, (move-to-window-line -1) goes to line 34
(the last line in the window), and recenters the cursor.

The move-to-window-line documentation says "-1 meaning the last fully
visible display line of the window". So line 34 would be fully visible,
so that I don't see why the cursor is recentered.

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Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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