bug#51602: 29.0.50; Slow completion on Windows 10 when symbol name contains unicode

[Eli Zaretskii]

> From: No Wayman <iarchivedmywholelife@gmail.com>
> Cc: 51602@debbugs.gnu.org
> Date: Fri, 05 Nov 2021 12:23:21 -0400
> 
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Your understanding is correct.
> 
> Thank you for confirming that.
> 
> I agree with your assessment that this is likely the result of the 
> user's system configuration.
> Appreciate you taking the time to address it at our repo.

I think this bug can be closed now, since it turns out the "hang" is
due to Emacs looking for a suitable font for some special characters
(and not finding it, for some reason).