GNU bug report logs - #28850
26.0.90; Error running timer 'jit-lock-stealth-fontify': (error "Invalid search bound (wrong side of point)")

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Alan Mackenzie <acm <at> muc.de>
Cc: contovob <at> tcd.ie, 28850 <at> debbugs.gnu.org
Subject: bug#28850: 26.0.90; Error running timer 'jit-lock-stealth-fontify': (error "Invalid search bound (wrong side of point)")
Date: Mon, 06 May 2019 18:35:28 +0300

> Date: Sun, 5 May 2019 09:06:22 +0000
> Cc: contovob <at> tcd.ie, 28850 <at> debbugs.gnu.org
> From: Alan Mackenzie <acm <at> muc.de>
> 
> That's the theory.  The fix, which is now obvious, is to (setq
> before-sws-pos ...) after moving back over a macro.  Perhaps I should
> check the result of c-down-list-backward too, but that's to be done
> after checking the current fix.
> 
> I can't actually test this myself, so would you please try out the patch
> below in your test setup, and let me know whether it fixes this nasty
> bug.

With this patch, the problem is gone, so I guess you hit the nail on
the head.  Thanks.

(In terms of testing, I think you can visit textprop.c, then turn on
jit-lock-stealth, and let Emacs run for a while.  Without the patch,
you should see the error message pretty soon.)

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