GNU bug report logs - #55216
29.0.50; easy-mmode--mode-docstring coerces empty string to nil, causing type error in subsequent insert

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jack Henahan <root <at> proofte.ch>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: 29.0.50;
 easy-mmode--mode-docstring coerces empty string to nil, causing type
 error in subsequent insert
Date: Mon, 02 May 2022 03:05:32 +0000

At this revision, it looks like the (string-lines doc) sends "" to nil,
which causes the subsequent insert to bail out with a char-or-string-p
type error. This is not the case on emacs-28. I ran into this when
trying to load lsp-mode, where they use define-minor-mode with "" as the
doc parameter. I have not verified the behavior on emacs-28 (presumably
it defaults to either the toggle string or just an empty string), but
I'll get to that when I have a free moment unless I'm beaten to it.

I'm not totally certain what the intended effect is or I'd have tried to
throw a patch together. It looks like Lars Ingebrigsten is the most
recent steward on this particular piece of code. I think it would
probably be sufficient to add something like

(let ((the-doc (string-lines doc))
      (lines (if the-doc
                 the-doc
               (list (format "Toggle %s on or off."
      mode-pretty-name)))))
      ...
      )


In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.24, cairo version 1.16.0)
 of 2022-04-30 built on DESKTOP-EIMTKI9
Repository revision: 61d6d43fe59cb9e6cedb7973e2b6922bccdcd4e2
Repository branch: master
System Description: Debian GNU/Linux 11 (bullseye)

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/home/jack/.emacs.d/.local/straight/build-29.0.50/org/oc-natbib hides /usr/local/share/emacs/29.0.50/lisp/org/oc-natbib
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ol-bbdb hides /usr/local/share/emacs/29.0.50/lisp/org/ol-bbdb
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ol-gnus hides /usr/local/share/emacs/29.0.50/lisp/org/ol-gnus
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob-R hides /usr/local/share/emacs/29.0.50/lisp/org/ob-R
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob hides /usr/local/share/emacs/29.0.50/lisp/org/ob
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob-lilypond hides /usr/local/share/emacs/29.0.50/lisp/org/ob-lilypond
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob-scheme hides /usr/local/share/emacs/29.0.50/lisp/org/ob-scheme
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/org-archive hides /usr/local/share/emacs/29.0.50/lisp/org/org-archive
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ox-man hides /usr/local/share/emacs/29.0.50/lisp/org/ox-man
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ox hides /usr/local/share/emacs/29.0.50/lisp/org/ox
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ox-odt hides /usr/local/share/emacs/29.0.50/lisp/org/ox-odt
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ol-bibtex hides /usr/local/share/emacs/29.0.50/lisp/org/ol-bibtex
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ol-info hides /usr/local/share/emacs/29.0.50/lisp/org/ol-info
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/oc-csl hides /usr/local/share/emacs/29.0.50/lisp/org/oc-csl
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob-matlab hides /usr/local/share/emacs/29.0.50/lisp/org/ob-matlab
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ox-icalendar hides /usr/local/share/emacs/29.0.50/lisp/org/ox-icalendar
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob-core hides /usr/local/share/emacs/29.0.50/lisp/org/ob-core
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ox-html hides /usr/local/share/emacs/29.0.50/lisp/org/ox-html
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/org-timer hides /usr/local/share/emacs/29.0.50/lisp/org/org-timer
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ol-irc hides /usr/local/share/emacs/29.0.50/lisp/org/ol-irc
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob-fortran hides /usr/local/share/emacs/29.0.50/lisp/org/ob-fortran
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/org-pcomplete hides /usr/local/share/emacs/29.0.50/lisp/org/org-pcomplete
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/org-faces hides /usr/local/share/emacs/29.0.50/lisp/org/org-faces
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/org-version hides /usr/local/share/emacs/29.0.50/lisp/org/org-version
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/ob-ocaml hides /usr/local/share/emacs/29.0.50/lisp/org/ob-ocaml
/home/jack/.emacs.d/.local/straight/build-29.0.50/org/org-install hides /usr/local/share/emacs/29.0.50/lisp/org/org-install

Features:
(shadow sort disp-table whitespace flyspell adaptive-wrap mail-extr
emacsbug vertico-directory consult-flycheck evil-collection-consult
consult-vertico consult evil-collection-bookmark bookmark flycheck-cask
evil-collection-shortdoc shortdoc evil-collection-help cl-print
projectile evil-collection-grep grep ibuf-ext evil-collection-ibuffer
ibuffer ibuffer-loaddefs lsp-protocol evil-collection-xref xref project
spinner network-stream evil-collection-markdown-mode markdown-mode
edit-indirect lv inline ewoc evil-anzu anzu hide-mode-line evil-embrace
evil-surround embrace expand-region text-mode-expansions
the-org-mode-expansions er-basic-expansions expand-region-core
expand-region-custom vi-tilde-fringe highlight-numbers parent-mode
display-line-numbers hl-todo highlight-indent-guides org-indent
elisp-demos evil-collection-indent flycheck-popup-tip
evil-collection-popup popup highlight-quoted rainbow-delimiters
auto-minor-mode jka-compr editorconfig-core editorconfig-core-handle
editorconfig-fnmatch mule-util cursor-sensor vertico-repeat
evil-collection-helpful helpful trace evil-collection-edebug edebug
backtrace lisp-mode info-look evil-collection-info info help-fns
radix-tree evil-collection-elisp-refs elisp-refs gcmh hl-line winner
smartparens-config smartparens-rst smartparens-markdown smartparens-text
smartparens emojify evil-collection-apropos apropos
evil-collection-tar-mode tar-mode evil-collection-arc-mode arc-mode
archive-mode ht undo-fu-session undo-fu flycheck-package package-lint
evil-collection-imenu imenu evil-collection-finder finder finder-inf
lisp-mnt evil-collection-package-menu core-packages package browse-url
url-handlers evil-collection-flycheck flycheck ws-butler editorconfig
oc-csl citeproc citeproc-itemgetters citeproc-biblatex parse-time
citeproc-bibtex parsebib ol-bibtex evil-collection-org org-roam-migrate
org-roam-mode org-roam-capture org-roam-id org-roam-node org-roam-db
org-roam-utils org-roam-compat org-roam org-capture smartparens-org
org-yt org-element org-persist xdg org-id org-refile avl-tree generator
org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-footnote org-src
noutline outline org-version ob-emacs-lisp org-table ol org-keys
org-loaddefs citeproc-cite citeproc-subbibs citeproc-sort citeproc-name
citeproc-formatters citeproc-number rst citeproc-proc citeproc-disamb
citeproc-itemdata citeproc-generic-elements citeproc-macro
citeproc-choose citeproc-date citeproc-context citeproc-prange
citeproc-style citeproc-locale citeproc-term citeproc-rt citeproc-lib
citeproc-s queue bibtex iso8601 oc-biblatex oc-natbib oc org-macro
ob-comint ob-core ob-eval org-pcomplete org-list org-entities org-faces
org-compat org-macs find-func evil-collection-calendar cal-menu calendar
cal-loaddefs emacsql-sqlite url-http url-auth url-gw nsm url url-proxy
url-privacy url-expand url-methods url-history url-cookie url-domsuf
url-util url-parse auth-source json map url-vars emacsql
emacsql-compiler evil-collection-which-key which-key better-jumper
company-capf company evil-collection-vertico vertico orderless
marginalia evil-goggles evil-easymotion evil-escape evil-snipe
git-commit evil-collection-log-edit log-edit message sendmail mailcap
yank-media rmc puny evil-collection-dired dired dired-loaddefs rfc822
mml mml-sec password-cache evil-collection-epa epa epg rfc6068
epg-config gnus-util 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 pcvs-util add-log magit-mode transient
magit-git magit-base magit-section format-spec crm with-editor compat
doom-snippets doom-snippets-lib yasnippet evil-collection-elisp-mode
elisp-mode savehist recentf tree-widget server autorevert filenotify
nav-flash evil-collection-compile evil-collection-custom cus-edit
cus-start cus-load wid-edit evil-collection-comint evil-collection
annalist compile text-property-search pulse color format-all ucs-utils
persistent-soft list-utils pcache eieio-base eieio eieio-core
eieio-loaddefs font-utils unicode-fonts persp-mode dtrt-indent
doom-modeline doom-modeline-segments doom-modeline-env
doom-modeline-core shrink-path f s all-the-icons all-the-icons-faces
data-material data-weathericons data-octicons data-fileicons
data-faicons data-alltheicons dash doom-themes-ext-org solaire-mode
face-remap modus-vivendi-theme modus-themes let-alist evil
evil-integration evil-maps evil-commands reveal evil-jumps
evil-command-window evil-search shell pcomplete comint ansi-color
evil-types evil-macros evil-repeat evil-states evil-core advice
evil-common windmove calc calc-loaddefs calc-macs thingatpt rect
evil-digraphs evil-vars ring edmacro kmacro derived use-package-bind-key
bind-key core-editor core-projects core-ui easy-mmode core-keybinds pp
general use-package-core core-modules tex-site cl core comp comp-cstr
warnings rx cl-seq cl-extra help-mode seq subr-x byte-opt bytecomp
byte-compile cconv core-lib pcase cl-macs gv cl-loaddefs cl-lib
iso-transl tooltip eldoc paren electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/pgtk-win pgtk-win term/common-win tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer nadvice simple cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
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 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
xwidget-internal dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo gtk pgtk lcms2 multi-tty make-network-process
native-compile emacs)

Memory information:
((conses 16 1224079 655388)
 (symbols 48 89509 51)
 (strings 32 408675 36051)
 (string-bytes 1 11022424)
 (vectors 16 112820)
 (vector-slots 8 4584648 640965)
 (floats 8 982 1858)
 (intervals 56 4546 292)
 (buffers 992 21))

Message #8 received at 55216 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Jack Henahan <root <at> proofte.ch>
Cc: 55216 <at> debbugs.gnu.org
Subject: Re: bug#55216: 29.0.50; easy-mmode--mode-docstring coerces empty
 string to nil, causing type error in subsequent insert
Date: Mon, 02 May 2022 10:36:00 +0200

Jack Henahan <root <at> proofte.ch> writes:

> At this revision, it looks like the (string-lines doc) sends "" to nil,
> which causes the subsequent insert to bail out with a char-or-string-p
> type error.

Yes, it was due to a rewrite of the string-lines function.  It should be
fixed now on the trunk.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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