bug#63271: 29.0.90; broken mouse-face

[Juri Linkov]

>> I checked out those commits and rebuilt emacs and can confirm that the
>> build from 61b9f2c3179 has the problem and the build from 0636e1066bb
>> does not.
>
> Actually, 0636e1066bb was one of the latest commits on emacs-28.
> So we need to continue bisecting on emacs-29 down from the commit
> be42fdc6dc6..: 2022-04-13 where the test case still fails.
> This is one of the last commits before huge merges,
> so the history below from it is quite flat and shallow,
> and thus easier to bisect.

I finished bisection, and not sure if this helps,
but that commit was 85a078e7853.