I suppose the occasional:

Error during redisplay: (jit-lock-function 3483) signaled (quit)
Error during redisplay: (jit-lock-function 3510) signaled (quit)

in *Messages* isn’t related or harmful?  Soon I’ll be using pixel width calculations to layout the mode line; and will keep a close eye on it.  

On Jan 12, 2024, at 2:05 AM, Eli Zaretskii <eliz@gnu.org> wrote:

From: JD Smith <jdtsmith@gmail.com>
Date: Thu, 11 Jan 2024 14:53:57 -0500
Cc: 68374@debbugs.gnu.org

Great, this small patch seems to work.  I’ve enabled glyph checking and will report here if anything untoward comes up.  Should I be keeping track of the *warnings* buffer?

Yes, and also look out for redisplay errors in *Messages*.

Thanks.