From: Juri Linkov <juri@linkov.net>
Date: Wed, 22 Mar 2023 07:44:02 +0000 (+0200)
Subject: * lisp/outline.el (outline--fix-buttons-after-change): Add save-match-data.
X-Git-Tag: emacs-29.0.90~112
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=84963956535;p=emacs.git

* lisp/outline.el (outline--fix-buttons-after-change): Add save-match-data.

It's important for a hook in after-change-functions not to change match-data.
Otherwise it breaks functions that make changes in the buffer, such as
for example, successive calls to delete-region in smerge-keep-n, etc.
---

diff --git a/lisp/outline.el b/lisp/outline.el
index a89985d1990..0e90c59c285 100644
--- a/lisp/outline.el
+++ b/lisp/outline.el
@@ -1877,7 +1877,7 @@ With a prefix argument, show headings up to that LEVEL."
   (save-excursion (goto-char beg) (setq beg (pos-bol)))
   (save-excursion (goto-char end) (setq end (pos-eol)))
   (remove-overlays beg end 'outline-button t)
-  (outline--fix-up-all-buttons beg end))
+  (save-match-data (outline--fix-up-all-buttons beg end)))
 
 
 (defvar-keymap outline-navigation-repeat-map