I use the current Emacs master branch and the marginalia package which adds annotations to completion, e.g., the truncated value and docstrings of variables when completing a variable name. When I do C-h v l (describe-variable, starting completion with initial input "l"), Emacs immediately gets stuck, takes 100% CPU, and will hang there indefinitely. I've made a C and Lisp backtrace using GDB, attached to this report.
gdb.txt.gz
Description: application/gzip
I've played around a bit, and the issue happens when the variable
`load-history' is annotated. At least I get the hang and 100% CPU also
when evaluating
(marginalia-annotate-variable "load-history")
Looking at the marginalia code, I can see no evil, and indeed I can
un-marginaliarize the sample to
(let ((print-escape-newlines t)
(print-escape-control-characters t)
(print-escape-multibyte t))
(string-width (prin1-to-string load-history)))
which freezes my emacs in the same way. Concretely, `prin1-to-string'
finishes and returns a 1.3 MB string and then `string-width' will run
indefinitely on that. I've attached the prin1-ed value of my
load-history.
load-history-prin1ed.txt.gz
Description: application/gzip
I can't reproduce that with emacs -Q where my load-history after startup
has just 139 entries rather than about 600 with my configured emacs.
For the same reason, I haven't been able to check if the problem is also
there with emacs 27 because my ~/.emacs is full of emacs 28 stuff.
Daniel, I've Cc'ed you just because you might be able to find some
workaround in marginalia.
In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.29, cairo
version 1.17.4)
of 2021-06-04 built on thinkpad-t440p
Repository revision: 7b50ed553faa6de6d51bf07d12d106ca61ab3ac4
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101001
System Description: Arch Linux
Configured using:
'configure --with-modules'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE
XIM XPM GTK3 ZLIB
Important settings:
value of $LC_MONETARY: de_DE.utf8
value of $LC_NUMERIC: de_DE.utf8
value of $LC_TIME: de_DE.utf8
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Text
Minor modes in effect:
global-aggressive-indent-mode: t
diredfl-global-mode: t
dynamic-completion-mode: t
which-key-mode: t
company-posframe-mode: t
global-company-mode: t
yas-global-mode: t
yas-minor-mode: t
global-git-commit-mode: t
magit-auto-revert-mode: t
vertico-mode: t
marginalia-mode: t
override-global-mode: t
minibuffer-depth-indicate-mode: t
recentf-mode: t
pixel-scroll-mode: t
save-place-mode: t
savehist-mode: t
show-paren-mode: t
shell-dirtrack-mode: t
tooltip-mode: t
global-eldoc-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
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
Load-path shadows:
~/Repos/el/mu/build/mu4e/mu4e hides ~/Repos/el/mu/mu4e/mu4e
~/Repos/el/mu/build/mu4e/mu4e-main hides ~/Repos/el/mu/mu4e/mu4e-main
~/Repos/el/mu/build/mu4e/mu4e-view hides ~/Repos/el/mu/mu4e/mu4e-view
~/Repos/el/mu/build/mu4e/mu4e-org hides ~/Repos/el/mu/mu4e/mu4e-org
~/Repos/el/mu/build/mu4e/mu4e-lists hides ~/Repos/el/mu/mu4e/mu4e-lists
~/Repos/el/mu/build/mu4e/mu4e-actions hides ~/Repos/el/mu/mu4e/mu4e-actions
~/Repos/el/mu/build/mu4e/mu4e-utils hides ~/Repos/el/mu/mu4e/mu4e-utils
~/Repos/el/mu/build/mu4e/mu4e-context hides ~/Repos/el/mu/mu4e/mu4e-context
~/Repos/el/mu/build/mu4e/mu4e-draft hides ~/Repos/el/mu/mu4e/mu4e-draft
~/Repos/el/mu/build/mu4e/mu4e-message hides ~/Repos/el/mu/mu4e/mu4e-message
~/Repos/el/mu/build/mu4e/mu4e-compose hides ~/Repos/el/mu/mu4e/mu4e-compose
~/Repos/el/mu/build/mu4e/mu4e-view-common hides
~/Repos/el/mu/mu4e/mu4e-view-common
~/Repos/el/mu/build/mu4e/mu4e-view-old hides ~/Repos/el/mu/mu4e/mu4e-view-old
~/Repos/el/mu/build/mu4e/mu4e-view-gnus hides ~/Repos/el/mu/mu4e/mu4e-view-gnus
~/Repos/el/mu/build/mu4e/mu4e-headers hides ~/Repos/el/mu/mu4e/mu4e-headers
~/Repos/el/mu/build/mu4e/mu4e-mark hides ~/Repos/el/mu/mu4e/mu4e-mark
~/Repos/el/mu/build/mu4e/mu4e-icalendar hides ~/Repos/el/mu/mu4e/mu4e-icalendar
~/Repos/el/mu/build/mu4e/mu4e-speedbar hides ~/Repos/el/mu/mu4e/mu4e-speedbar
~/Repos/el/mu/build/mu4e/mu4e-contrib hides ~/Repos/el/mu/mu4e/mu4e-contrib
~/Repos/el/mu/build/mu4e/mu4e-proc hides ~/Repos/el/mu/mu4e/mu4e-proc
~/Repos/el/mu/build/mu4e/mu4e-meta hides ~/Repos/el/mu/mu4e/mu4e-meta
~/Repos/el/mu/build/mu4e/mu4e-vars hides ~/Repos/el/mu/mu4e/mu4e-vars
/home/horn/.emacs.d/elpa/transient-20210530.2252/transient hides
/home/horn/Repos/el/emacs/lisp/transient
Features:
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hashtable-print-readable backquote threads dbusbind inotify lcms2
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Memory information:
((conses 16 578262 70996)
(symbols 48 44260 10)
(strings 32 199185 6686)
(string-bytes 1 6028236)
(vectors 16 77469)
(vector-slots 8 928820 30025)
(floats 8 689 451)
(intervals 56 1123 364)
(buffers 992 16))
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