Subject: bug#47937: [External] : bug#47937: 27.1; Invisible text property updated only for a portion of buffer

From: Drew Adams <[email-masked]>
Date: Wed, 21 Apr 2021 22:40:42 +0000

> Because you have font-lock-mode turned on.  And JIT font-lock begins
> by wiping out all the text properties.

Interesting.  Didn't know that.

Why does it wipe out all text properties, and not
just the properties that font-lock itself handles?

(I don't mean to detour the bug thread.  I'm just
curious, if the answer is short.)