From: Raffael Stocker <r.stocker@mnet-mail.de>
To: 72532@debbugs.gnu.org
Subject: bug#72532: [PATCH] ; lisp/progmodes/which-func.el (which-function-mode): check buffer
Date: Thu, 08 Aug 2024 21:48:45 +0200 [thread overview]
Message-ID: <yplmseveg5ia.fsf@mnet-mail.de> (raw)
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Tags: patch
Hi Emacs,
I have been getting "Selecting deleted buffer" errors recently when
opening files. This is due to ‘which-function-mode’ (in my
prog-mode-hook) walking through (buffer-list) without checking for live
buffers.
I have not been able to reproduce with ‘emacs -Q’, but it seems to be
connected to eglot, as I see the problem only with eglot enabled.
Nevertheless, I would like to suggest the attached patch, if only to
make which-function-mode more robust.
Regards,
Raffael
In GNU Emacs 30.0.60 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.43, cairo version 1.18.0) of 2024-08-06 built on Whiteflame
Repository revision: fb642d9cf546f52a11cdfef479447ce2e8fa3ec8
Repository branch: emacs-30
Windowing system distributor 'The X.Org Foundation', version 11.0.12101013
System Description: Arch Linux
Configured using:
'configure --prefix=/opt/emacs --with-native-compilation=aot'
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From cd8b170f2c716cf67623c4ffc4ae38dc63c49496 Mon Sep 17 00:00:00 2001
From: Raffael Stocker <r.stocker@mnet-mail.de>
Date: Thu, 8 Aug 2024 21:38:14 +0200
Subject: [PATCH] ; lisp/progmodes/which-func.el (which-function-mode): check
buffer
Ensure we are not selecting a deleted buffer.
---
lisp/progmodes/which-func.el | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/lisp/progmodes/which-func.el b/lisp/progmodes/which-func.el
index 28aacd335ba..5326be5e877 100644
--- a/lisp/progmodes/which-func.el
+++ b/lisp/progmodes/which-func.el
@@ -309,9 +309,10 @@ which-function-mode
(setq which-func-update-timer
(run-with-idle-timer which-func-update-delay t #'which-func-update)))
(dolist (buf (buffer-list))
- (with-current-buffer buf
- (which-func--header-line-remove)
- (which-func-ff-hook))))
+ (when (buffer-live-p buf)
+ (with-current-buffer buf
+ (which-func--header-line-remove)
+ (which-func-ff-hook)))))
(defvar which-function-imenu-failed nil
"Locally t in a buffer if `imenu--make-index-alist' found nothing there.")
--
2.46.0
next reply other threads:[~2024-08-08 19:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-08 19:48 Raffael Stocker [this message]
2024-08-09 5:27 ` bug#72532: [PATCH] ; lisp/progmodes/which-func.el (which-function-mode): check buffer Eli Zaretskii
2024-08-09 17:35 ` Raffael Stocker
2024-08-09 9:45 ` Stefan Kangas
2024-08-09 17:39 ` Raffael Stocker
2024-08-09 19:59 ` Raffael Stocker
2024-08-15 8:36 ` Eli Zaretskii
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