GNU bug report logs - #72131
29.3; peg.el: syntax class character for symbol is '_', not 's'

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

From: Jeff Trull <edaskel <at> att.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.3; peg.el: syntax class character for symbol is '_', not 's'
Date: Mon, 15 Jul 2024 15:26:02 -0700

[Message part 1 (text/plain, inline)]

(require 'peg)
(with-temp-buffer
  (save-excursion (insert "_"))
  (peg-parse (syntax-class symbol)))

results in the message
"No merge-error method for: (syntax-class symbol)".

The root cause seems to be line 703 of peg.el where the syntax class
characters are defined. peg uses "s" for symbols instead of
"_". Correcting this results in a successful parse in the given code.



In GNU Emacs 29.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41,
 cairo version 1.18.0) of 2024-03-31, modified by Debian built on
 lcy02-amd64-083
Windowing system distributor 'The X.Org Foundation', version 11.0.12101011
System Description: Ubuntu 24.04 LTS

Configured using:
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/usr/share/emacs/29.3/lisp/org/ox-icalendar
/home/jet/.config/emacs/elpa/org-9.7.5/org-id hides
/usr/share/emacs/29.3/lisp/org/org-id
/home/jet/.config/emacs/elpa/org-9.7.5/org-plot hides
/usr/share/emacs/29.3/lisp/org/org-plot
/home/jet/.config/emacs/elpa/org-9.7.5/org-refile hides
/usr/share/emacs/29.3/lisp/org/org-refile
/home/jet/.config/emacs/elpa/org-9.7.5/ob-fortran hides
/usr/share/emacs/29.3/lisp/org/ob-fortran
/home/jet/.config/emacs/elpa/org-9.7.5/ob-sed hides
/usr/share/emacs/29.3/lisp/org/ob-sed
/home/jet/.config/emacs/elpa/org-9.7.5/org-src hides
/usr/share/emacs/29.3/lisp/org/org-src
/home/jet/.config/emacs/elpa/org-9.7.5/ob-ditaa hides
/usr/share/emacs/29.3/lisp/org/ob-ditaa
/home/jet/.config/emacs/elpa/org-9.7.5/ob-ref hides
/usr/share/emacs/29.3/lisp/org/ob-ref
/home/jet/.config/emacs/elpa/org-9.7.5/ol-gnus hides
/usr/share/emacs/29.3/lisp/org/ol-gnus
/home/jet/.config/emacs/elpa/org-9.7.5/org-goto hides
/usr/share/emacs/29.3/lisp/org/org-goto

Features:
(shadow sort mail-extr emacsbug erc-list erc-menu erc-join erc-ring
erc-pcomplete erc-track erc-match erc-button erc-fill erc-stamp
erc-netsplit erc-goodies erc erc-backend erc-networks erc-common
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vc-dispatcher org-eldoc org-superstar oc-basic ol-eww eww url-queue
mm-url ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect gnus-art mm-uu
mml2015 mm-view mml-smime smime gnutls dig gnus-sum shr pixel-fill
kinsoku url-file svg gnus-group gnus-undo gnus-start gnus-dbus
gnus-cloud nnimap nnmail mail-source utf7 nnoo gnus-spec gnus-int
gnus-range message sendmail yank-media rfc822 mml mml-sec epa derived
mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
ietf-drums mailabbrev gmm-utils mailheader gnus-win gnus nnheader
gnus-util mail-utils range mm-util mail-prsvr ol-docview doc-view
jka-compr ol-bibtex bibtex ol-bbdb ol-w3m ol-doi org-link-doi winner
recentf tramp-archive tramp-gvfs tramp-cache time-stamp zeroconf dbus
helm-x-files helm-for-files helm-bookmark helm-adaptive helm-info
bookmark helm-external helm-net xml dired-aux highlight-quoted cus-edit
pp cus-start cus-load helm-projectile helm-files image-dired
image-dired-tags image-dired-external image-dired-util image-mode dired
dired-loaddefs exif helm-tags helm-buffers helm-occur helm-grep
helm-regexp helm-locate helm-types helm-xref helm-utils helm-help helm
helm-global-bindings helm-easymenu helm-core async-bytecomp helm-source
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warnings lsp-protocol xref tree-widget wid-edit spinner network-stream
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epg-config projectile lisp-mnt grep compile text-property-search
ibuf-ext ibuffer ibuffer-loaddefs bury-successful-compilation advice
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tramp-integration files-x tramp-compat parse-time iso8601 python project
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ox-latex ox-icalendar org-agenda ox-html table ox-ascii ox-publish ox
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helm-core-autoloads async-autoloads hide-mode-line-autoloads
irony-autoloads keycast-autoloads lgr-autoloads lsp-treemacs-autoloads
lsp-ui-autoloads lsp-mode-autoloads magit-autoloads pcase
git-commit-autoloads magit-section-autoloads markdown-mode-autoloads
modus-themes-autoloads org-contrib-autoloads org-present-autoloads
org-ql-autoloads org-re-reveal-autoloads htmlize-autoloads
org-super-agenda-autoloads org-autoloads ov-autoloads ox-gfm-autoloads
package-lint-autoloads peg-autoloads popup-autoloads pos-tip-autoloads
projectile-autoloads pythonic-autoloads f-autoloads
racket-mode-autoloads sqlite3-autoloads subed-autoloads
transient-autoloads tree-sitter-langs-autoloads treemacs-autoloads
posframe-autoloads ht-autoloads treepy-autoloads trinary-autoloads
ts-autoloads dash-autoloads visual-fill-column-autoloads
websocket-autoloads wfnames-autoloads with-editor-autoloads info
compat-autoloads yaml-autoloads yasnippet-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 cl-seq eieio eieio-core cl-macs password-cache json subr-x
map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc
iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook
vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode lisp-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 seq simple cl-generic indonesian philippine
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 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 dbusbind inotify lcms2 dynamic-setting system-font-setting
font-render-setting cairo move-toolbar gtk x-toolkit xinput2 x multi-tty
make-network-process native-compile emacs)

Memory information:
((conses 16 890461 133415)
 (symbols 48 67113 1)
 (strings 32 297233 11279)
 (string-bytes 1 8471700)
 (vectors 16 104617)
 (vector-slots 8 2759002 157012)
 (floats 8 643 379)
 (intervals 56 6628 2616)
 (buffers 984 43))

[Message part 2 (text/html, inline)]

Message #8 received at 72131 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jeff Trull <edaskel <at> att.net>, Helmut Eller <eller.helmut <at> gmail.com>,
 Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 72131 <at> debbugs.gnu.org
Subject: Re: bug#72131: 29.3;
 peg.el: syntax class character for symbol is '_', not 's'
Date: Tue, 16 Jul 2024 13:11:21 +0300

> From: Jeff Trull <edaskel <at> att.net>
> Date: Mon, 15 Jul 2024 15:26:02 -0700
> 
> (require 'peg)
> (with-temp-buffer
>   (save-excursion (insert "_"))
>   (peg-parse (syntax-class symbol)))
> 
> results in the message
> "No merge-error method for: (syntax-class symbol)".
> 
> The root cause seems to be line 703 of peg.el where the syntax class
> characters are defined. peg uses "s" for symbols instead of
> "_". Correcting this results in a successful parse in the given code.

Stefan and Helmut, any comments or suggestions?

Message #11 received at 72131 <at> debbugs.gnu.org (full text, mbox):

From: Helmut Eller <eller.helmut <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 72131 <at> debbugs.gnu.org, Jeff Trull <edaskel <at> att.net>,
 Stefan Monnier <monnier <at> iro.umontreal.ca>
Subject: Re: bug#72131: 29.3; peg.el: syntax class character for symbol is
 '_', not 's'
Date: Tue, 16 Jul 2024 15:00:41 +0200

On Tue, Jul 16 2024, Eli Zaretskii wrote:

>> From: Jeff Trull <edaskel <at> att.net>
>> Date: Mon, 15 Jul 2024 15:26:02 -0700
>> 
>> (require 'peg)
>> (with-temp-buffer
>>   (save-excursion (insert "_"))
>>   (peg-parse (syntax-class symbol)))
>> 
>> results in the message
>> "No merge-error method for: (syntax-class symbol)".
>> 
>> The root cause seems to be line 703 of peg.el where the syntax class
>> characters are defined. peg uses "s" for symbols instead of
>> "_". Correcting this results in a successful parse in the given code.
>
> Stefan and Helmut, any comments or suggestions?

Yes, looks like "_" would the correct.  A method like

 (cl-defmethod peg--merge-error (merged (_ (eql syntax-class)) x)
   (cl-adjoin `(syntax-class ,x) merged :test #'equal))

is also missing and error messages like

  peg-signal-failure: Parse error at %d (expecting %S): 1, ("abc")

don't look right either.

The first thing to do would be to write a test.

Message #14 received at 72131 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Helmut Eller <eller.helmut <at> gmail.com>, 72131 <at> debbugs.gnu.org,
 Jeff Trull <edaskel <at> att.net>
Subject: Re: bug#72131: 29.3; peg.el: syntax class character for symbol is
 '_', not 's'
Date: Tue, 16 Jul 2024 09:04:09 -0400

>> The root cause seems to be line 703 of peg.el where the syntax class
>> characters are defined. peg uses "s" for symbols instead of
>> "_". Correcting this results in a successful parse in the given code.
>
> Stefan and Helmut, any comments or suggestions?

Indeed `s` doesn't exist as a syntax class, it should be `_`.


        Stefan

Message #19 received at 72131-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: eller.helmut <at> gmail.com, edaskel <at> att.net, 72131-done <at> debbugs.gnu.org
Subject: Re: bug#72131: 29.3; peg.el: syntax class character for symbol is
 '_', not 's'
Date: Sat, 20 Jul 2024 11:55:18 +0300

> From: Stefan Monnier <monnier <at> iro.umontreal.ca>
> Cc: Jeff Trull <edaskel <at> att.net>,  Helmut Eller <eller.helmut <at> gmail.com>,
>   72131 <at> debbugs.gnu.org
> Date: Tue, 16 Jul 2024 09:04:09 -0400
> 
> >> The root cause seems to be line 703 of peg.el where the syntax class
> >> characters are defined. peg uses "s" for symbols instead of
> >> "_". Correcting this results in a successful parse in the given code.
> >
> > Stefan and Helmut, any comments or suggestions?
> 
> Indeed `s` doesn't exist as a syntax class, it should be `_`.

Since this was recently fixed on the emacs-30 branch, I'm now closing
the bug.

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