Subject: Re: bug#33740: [PATCH] Customizable flymake mode-line indicator

From: Eli Zaretskii <[email-masked]>
Date: Tue, 17 Sep 2019 09:09:14 +0300

> From: Lars Ingebrigtsen <[email-masked]>
> Date: Tue, 17 Sep 2019 00:22:08 +0200
> Cc: [email-masked], Andrii Kolomoiets <[email-masked]>
> 
> I thought we could just put text properties on strings we feed to the
> mode-line machinery, but it seems like these don't survive?

You need to do it "wisely", then they do survive.