Package: emacs;
Reported by: "Jay Berkenbilt" <ejb <at> ql.org>
Date: Wed, 26 Mar 2025 11:46:02 UTC
Severity: normal
Found in version 30.1
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From: "Jay Berkenbilt" <ejb <at> ql.org> To: 77276 <at> debbugs.gnu.org Subject: bug#77276: 30.1; find-alternate-file no longer disconnects emacsclient Date: Wed, 26 Mar 2025 07:43:42 -0400
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The issue I'm describing occurs in emacs 30 but not emacs 29 or earlier. I noticed it in during emacs 30.0.93 but didn't immediately recognize it as a bug. You can see the generated information below, but I have also reproduced this on macOS with emacs -Q, and it also happens on my Linux system (with emacs -Q) where I build emacs myself, so I don't believe this is environment-specific.
When you run emacsclient to open a file in an existing emacs, and then run M-x find-alternate-file on the same file (e.g., C-x C-v RET), the file loses its connection with emacsclient, but emacsclient does not exit. In prior versions, emacsclient would exit after C-x C-v RET.
emacs 30:
shell% emacsclient /tmp/a
emacs: C-x C-v RET ;; emacsclient is still waiting
emacs: C-x # ;; nothing happens; the buffer is no longer connected with emacsclient
emacs 29 and earlier:
shell% emacsclient /tmp/a
emacs: C-x C-v RET ;; emacsclient exits
emacs: C-x # ;; nothing happens; the buffer is no longer connected with emacsclient
Explicitly killing the buffer with C-x k does cause emacsclient to exit.
This is probably related to a change in find-alternate-file as the problem occurs with emacs 30 and emacsclient from emacs 29 but not with emacs 29 and emacsclient from emacs 30.
I consider the older behavior to be more desirable and less surprising as emacsclient shouldn't hang around waiting for an event that will never occur. In both emacs 29 and 30, CTRL-c on emacsclient will cause the buffer to be removed from emacs before but not after C-x C-v, which I consider to be correct/expected behavior. The fact that CTRL-c on emacsclient after C-x C-v leaves the buffer alone also shows that emacsclient is no longer connected to the file in emacs 30 after C-x C-v. Note that explicitly killing the buffer with C-x k still causes emacsclient to exit.
I have been using this technique since the dawn of time, perhaps as long as I've been using emacsclient (which probably goes back to emacs 18 for me) to intentionally disconnect a file from emacsclient. I'm not sure whether there's a better way. I'm trying to retrain my muscle memory to emacsclient -n, but this change of behavior has made me realize how deeply this is ingrained into my habits. Anyway, it's not uncommon for me to do something like `emacsclient *.tf` and then flip through the files doing C-x # on the ones I don't want and C-x C-v RET on the ones I do.
Generated information below.
In GNU Emacs 30.1 (build 1, aarch64-apple-darwin21.6.0, NS
appkit-2113.65 Version 12.7.6 (Build 21H1320)) of 2025-02-24 built on
armbob.lan
Windowing system distributor 'Apple', version 10.3.2575
System Description: macOS 15.3.2
Configured using:
'configure --with-ns '--enable-locallisppath=/Library/Application
Support/Emacs/${version}/site-lisp:/Library/Application
Support/Emacs/site-lisp' --with-modules 'CFLAGS=-DFD_SETSIZE=10000
-DDARWIN_UNLIMITED_SELECT' --with-x-toolkit=no'
Configured features:
ACL GLIB GMP GNUTLS JPEG LIBXML2 MODULES NOTIFY KQUEUE NS PDUMPER PNG
RSVG SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM ZLIB
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Terraform
Minor modes in effect:
terraform-format-on-save-mode: t
server-mode: t
global-visual-wrap-prefix-mode: t
visual-wrap-prefix-mode: t
tooltip-mode: t
global-eldoc-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
minibuffer-regexp-mode: t
column-number-mode: t
line-number-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
/Users/ejb/.emacs.d/elpa/editorconfig-20240604.602/editorconfig hides /Applications/Emacs.app/Contents/Resources/lisp/editorconfig <http://emacs.app/Contents/Resources/lisp/editorconfig>
/Users/ejb/.emacs.d/elpa/editorconfig-20240604.602/editorconfig-core hides /Applications/Emacs.app/Contents/Resources/lisp/editorconfig-core <http://emacs.app/Contents/Resources/lisp/editorconfig-core>
/Users/ejb/.emacs.d/elpa/editorconfig-20240604.602/editorconfig-conf-mode hides /Applications/Emacs.app/Contents/Resources/lisp/editorconfig-conf-mode <http://emacs.app/Contents/Resources/lisp/editorconfig-conf-mode>
/Users/ejb/elisp/startup hides /Applications/Emacs.app/Contents/Resources/lisp/startup <http://emacs.app/Contents/Resources/lisp/startup>
/Users/ejb/.emacs.d/elpa/editorconfig-20240604.602/editorconfig-tools hides /Applications/Emacs.app/Contents/Resources/lisp/editorconfig-tools <http://emacs.app/Contents/Resources/lisp/editorconfig-tools>
/Users/ejb/.emacs.d/elpa/editorconfig-20240604.602/editorconfig-core-handle hides /Applications/Emacs.app/Contents/Resources/lisp/editorconfig-core-handle <http://emacs.app/Contents/Resources/lisp/editorconfig-core-handle>
/Users/ejb/.emacs.d/elpa/editorconfig-20240604.602/editorconfig-fnmatch hides /Applications/Emacs.app/Contents/Resources/lisp/editorconfig-fnmatch <http://emacs.app/Contents/Resources/lisp/editorconfig-fnmatch>
Features:
(shadow sort flyspell ispell mail-extr warnings emacsbug imenu
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vc-dispatcher qmime qmime-compose qmime-view filecache server
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message sendmail yank-media puny dired dired-loaddefs rfc822 mml mml-sec
epa derived epg rfc6068 epg-config gnus-util text-property-search
time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047
rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils gmm-utils
mailheader cc-styles cc-align cc-engine cc-vars cc-defs jka-compr
visual-wrap cus-load advice ahk-mode-autoloads cmake-mode-autoloads
company-autoloads dockerfile-mode-autoloads
flycheck-golangci-lint-autoloads flymake-go-staticcheck-autoloads
go-mode-autoloads groovy-mode-autoloads jinja2-mode-autoloads
json-mode-autoloads kotlin-mode-autoloads lsp-mode-autoloads
ht-autoloads lua-mode-autoloads lv-autoloads markdown-mode-autoloads
mermaid-mode-autoloads prettier-autoloads editorconfig-autoloads
nvm-autoloads f-autoloads iter2-autoloads rust-mode-autoloads
spinner-autoloads terraform-mode-autoloads hcl-mode-autoloads
tide-autoloads flycheck-autoloads s-autoloads info dash-autoloads
typescript-mode-autoloads web-mode-autoloads xterm-color-autoloads
yaml-mode-autoloads package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie generate-lisp-file
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eieio eieio-core cl-macs icons password-cache json subr-x map byte-opt
gv bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc iso-transl
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european ethiopic indian cyrillic chinese composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads kqueue cocoa ns multi-tty make-network-process emacs)
Memory information:
((conses 16 153394 31179) (symbols 48 15524 0) (strings 32 44243 2071)
(string-bytes 1 1173627) (vectors 16 23749)
(vector-slots 8 232341 13472) (floats 8 195 122)
(intervals 56 1844 55) (buffers 992 17))
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