From 115a940a4b1d28f18df5aa82a19fae9cbe67b869 Mon Sep 17 00:00:00 2001
From: Jens Schmidt <jschmidt4gnu@vodafonemail.de>
Date: Tue, 26 Sep 2023 21:36:19 +0200
Subject: [PATCH] Fix beginning-of-defun not jumping to BOF
In batch mode or when font-lock and some other niceties are switched
off, function `syntax-ppss' can modify match data held by function
`beginning-of-defun-raw'. In that case, `beginning-of-defun' can jump
to some seemingly arbitrary position, and not the actual BOF.
* lisp/emacs-lisp/lisp.el (beginning-of-defun-raw): Save match data
around a call to `syntax-ppss'. (Bug#66218)
---
lisp/emacs-lisp/lisp.el | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lisp/emacs-lisp/lisp.el b/lisp/emacs-lisp/lisp.el
index a4aa79c171e..ee481dc4ed3 100644
--- a/lisp/emacs-lisp/lisp.el
+++ b/lisp/emacs-lisp/lisp.el
@@ -422,7 +422,8 @@ of a defun, nil if it failed to find one."
"\\(?:" defun-prompt-regexp "\\)\\s(")
"^\\s(")
nil 'move arg))
- (nth 8 (syntax-ppss))))
+ (save-match-data
+ (nth 8 (syntax-ppss)))))
found)
(progn (goto-char (1- (match-end 0)))
t)))
--
2.39.5