Package: emacs;
Reported by: Phil Sainty <psainty <at> orcon.net.nz>
Date: Thu, 9 Jan 2025 12:10:01 UTC
Severity: normal
Found in version 30.0.93
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Phil Sainty <psainty <at> orcon.net.nz> To: bug-gnu-emacs <at> gnu.org Subject: 30.0.93; Frequent (but inconsistent) hangs when creating frames Date: Fri, 10 Jan 2025 01:09:20 +1300
[Message part 1 (text/plain, inline)]
I've recently switched my main instance of Emacs to 30.0 (firstly
30.0.93, and now the HEAD of the emacs-30 branch), and I've been
experiencing frequent hangs (with the CPU core spinning at 100% usage)
when creating new frames.
More specifically: when creating frames using a system I use with my
window manager when I want to interactively select a thing in a pop-up
Emacs frame. (I've tried to replicate this with simply "C-x 5 2" but
didn't manage to do so thus far.)
If I spam a terminal with a large number of "kill -USR2 <pid>" commands
for the spinning Emacs process ID, then I'll get control back.
I'm experiencing this (inconsistently, but quite often) with using a
keybinding for my window manager (XMonad), which runs a command like:
emacsclient --eval "(my-x-paste-example $(xdotool getactivewindow))"
With that command being something like:
(defun my-x-paste-example (wid)
(interactive)
(my-x-paste #'my-example wid "*Example*" "Testing"))
(defun my-example ()
(interactive)
(gui-backend-set-selection
'CLIPBOARD (completing-read "Choose: " '(one two three))))
I've attached the definition of `my-x-paste' to this report. It
creates a small floating frame for the interaction, and afterwards it
runs xdotool again to paste the clipboard contents into the X window
obtained by "xdotool getactivewindow", but I think the xdotool aspect
shouldn't be a factor, as it never gets that far -- Emacs creates the
frame and then immediately hangs before I can interact with it at all.
Perhaps the frame parameters used in that function are relevant,
though.
I've recompiled Emacs for debugging and run it under gdb, and have
reproduced a hang, so I have also attached some backtraces from gdb
(more than one because they're variable). In each case I used
"kill -TSTP <PID>" to stop Emacs spinning and drop to the gdb prompt,
and then the "backtrace" command. I then had to "continue" multiple
times before Emacs started running/spinning again, after which I
repeated the process.
(I also tried "xbacktrace" but that just said "Undefined command:
"xbacktrace". Try "help".", and I'm afraid that I only just saw the
"bt full" recommendation in the report-emacs-bug template -- the
etc/DEBUG file doesn't actually mention that command -- and I've not
been able to reproduce the issue in the interim to try that one, so
I'm sending this as-is for now.)
The function I'm calling in lisp does a `completing-read', and I can
see Fread_from_minibuffer in the backtrace, so I *guess* it's getting
that far after creating the frame; but I'm not sure if that's a factor
as (I think) I've also seen this with a pop-up notification frame
I use for appt.el notifications -- and that one doesn't prompt me at
all (but it's creating frames in a fairly similar way).
I can't replicate this at will, but it happens often enough that I
*should* be able to recreate it again sometime soon, so let me know
if you want me to try other things (but note that I'm not familiar
with gdb and debugging C code, so step-by-step instructions will be
helpful for that).
-Phil
In GNU Emacs 30.0.93 (build 5, x86_64-pc-linux-gnu, X toolkit, cairo
version 1.16.0, Xaw scroll bars) of 2025-01-09 built on phil-lp
Repository revision: 01464fc882dbb56d4271fbb89b7b847e8374d39c
Repository branch: emacs-30
Windowing system distributor 'The X.Org Foundation', version
11.0.12101004
System Description: Ubuntu 22.04.5 LTS
Configured using:
'configure --prefix=/home/phil/emacs/30.x/usr/local
--without-native-compilation --with-x-toolkit=lucid --without-sound
'--program-transform-name=s/^ctags$/ctags_emacs/'
--enable-checking=yes,glyphs --enable-check-lisp-object-type
'CFLAGS=-O0 -g3''
Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
LCMS2 LIBSELINUX LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP X11 XDBE XIM
XPM LUCID ZLIB
Important settings:
value of $LC_MONETARY: en_NZ.UTF-8
value of $LC_NUMERIC: en_NZ.UTF-8
value of $LC_TIME: en_NZ.UTF-8
value of $LANG: en_GB.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8
Major mode: IBuffer
Minor modes in effect:
text-scale-mode: t
hexl-follow-ascii: t
magit-wip-initial-backup-mode: t
magit-wip-before-change-mode: t
magit-wip-after-apply-mode: t
magit-wip-after-save-mode: t
magit-wip-mode: t
global-git-commit-mode: t
magit-auto-revert-mode: t
catalyst-directory-event-icalendar-sync-mode: t
minibuffer-line-mode: t
global-edit-server-edit-mode: t
savehist-mode: t
global-anzu-mode: t
anzu-mode: t
my-contextual-help-mode: t
global-so-long-mode: t
server-mode: t
global-visible-mark-mode: t
visible-mark-mode: t
repeat-mode: t
display-battery-mode: t
my-visible-bell-mode: t
global-display-fill-column-indicator-mode: t
minibuffer-depth-indicate-mode: t
which-key-mode: t
winner-mode: t
keep-buffers-mode: t
global-subword-mode: t
subword-mode: t
global-hl-line-mode: t
display-time-mode: t
recentf-mode: t
global-atomic-chrome-edit-mode: t
my-global-keys-local-minor-mode: t
my-keys-local-minor-mode: t
windmove-mode: t
url-handler-mode: t
auto-compile-on-load-mode: t
auto-compile-on-save-mode: t
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tab-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
minibuffer-regexp-mode: t
buffer-read-only: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
/home/phil/.emacs.d/el-get/scratch/el-get hides
/home/phil/.emacs.d/el-get/el-get/el-get
/home/phil/.emacs.d/el-get/avy/avy hides
/home/phil/.emacs.d/elpa/avy-0.5.0/avy
/home/phil/.emacs.d/el-get/dash/dash hides
/home/phil/.emacs.d/elpa/dash-2.19.1/dash
/home/phil/.emacs.d/el-get/iedit/iedit hides
/home/phil/.emacs.d/elpa/iedit-0.9.9.9.9/iedit
/home/phil/.emacs.d/my-lisp/psysh hides
/home/phil/.emacs.d/elpa/psysh-0.4.9/psysh
/home/phil/.emacs.d/elpa/transient-0.7.9/transient hides
/home/phil/emacs/30.x/usr/local/share/emacs/30.0.93/lisp/transient
/home/phil/.emacs.d/el-get/which-key/which-key hides
/home/phil/emacs/30.x/usr/local/share/emacs/30.0.93/lisp/which-key
Features:
(shadow sort ecomplete mail-extr emacsbug ibuf-ext ibuffer
ibuffer-loaddefs dired-aux face-remap pulse color help-fns xref project
hi-lock noutline outline find-func totp hexl executable magit-wip
magit-log which-func imenu magit-diff smerge-mode diff git-commit
log-edit message sendmail yank-media rfc822 mml mml-sec gnus-util
mm-decode mm-bodies mm-encode mailabbrev gmm-utils mailheader pcvs-util
add-log magit-core magit-autorevert autorevert filenotify magit-margin
magit-transient magit-process magit-mode transient edmacro compat
magit-git magit-section magit-utils crm dash mail-utils gnutls
network-stream url-cache epa-file epa epg rfc6068 epg-config view
holidays holiday-loaddefs cal-julian lunar solar cal-dst vc-git
diff-mode track-changes vc-dispatcher autoinsert bug-reference appt
diary-lib diary-loaddefs cal-menu calendar cal-loaddefs lexbind-mode
hl-sexp fic-mode elide-head idle-highlight-mode catalyst-directory
vtable mule-util url-http url-auth mail-parse rfc2231 rfc2047 rfc2045
mm-util ietf-drums mail-prsvr url-gw nsm puny goto-addr sockit tabify
minibuffer-line edit-server my-org my-projects my-session savehist
desktop frameset my-theme zenburn-theme my-mail my-libraries sudo anzu
my-version-control my-text my-programming so-long my-rectangles rect
my-utilities with-editor server browse-kill-ring derived term disp-table
shell pcomplete ehelp my-configuration visible-mark cus-edit pp cus-load
dired-details dired-x repeat highlight-parentheses format-spec battery
delight delsel ffap thingatpt display-fill-column-indicator mb-depth
which-key pcase easy-mmode winner keep-buffers cap-words superword
subword hl-line time recentf tree-widget wid-edit atomic-chrome
websocket bindat let-alist my-whitespace ws-trim my-externals .loaddefs
rainbow-mode notify dbus xml mo-git-blame cl iedit el-get cl-extra
help-mode autoload loaddefs-gen radix-tree lisp-mnt dired dired-loaddefs
my-holidays my-local kmacro my-mahara grep tks generic-x catalyst
redshift-indent my-keybindings framemove advice windmove my-startup-log
trace cl-print time-date adaptive-wrap-autoloads dape-autoloads
docker-autoloads dockerfile-mode-autoloads eat-autoloads
eldoc-box-autoloads elfeed-autoloads haskell-mode-autoloads
helpful-autoloads elisp-refs-autoloads f-autoloads iedit-autoloads rx
modus-themes-autoloads psysh-autoloads rfc-mode-autoloads s-autoloads
markdown-mode-autoloads tablist-autoloads info transient-autoloads
visual-fill-autoloads websocket-autoloads wtf-autoloads xr-autoloads
package browse-url url url-proxy url-privacy url-expand url-methods
url-history url-cookie generate-lisp-file url-domsuf url-util mailcap
url-handlers url-parse auth-source ...)
Memory information:
((conses 16 342345 195376) (symbols 48 38691 4)
(strings 32 146239 28849) (string-bytes 1 3881004) (vectors 16 64057)
(vector-slots 8 1530248 160628) (floats 8 907 8658)
(intervals 56 9801 2166) (buffers 992 27))
[my-x-paste.el (text/x-lisp, attachment)]
[backtrace1.txt.gz (application/x-gzip, attachment)]
[backtrace2.txt.gz (application/x-gzip, attachment)]
[backtrace3.txt.gz (application/x-gzip, attachment)]
[backtrace4.txt.gz (application/x-gzip, attachment)]
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.