Package: emacs;
Reported by: Chris Siebenmann <cks.emacsbugs-01 <at> cs.toronto.edu>
Date: Wed, 22 Nov 2023 08:26:01 UTC
Severity: normal
Found in version 29.1
View this message in rfc822 format
From: Chris Siebenmann <cks.emacsbugs-01 <at> cs.toronto.edu> To: 67359 <at> debbugs.gnu.org Cc: cks.emacsbugs-01 <at> cs.toronto.edu Subject: bug#67359: 29.1; 29.1: MH-E limited display malfunctions if nothing is matched Date: Tue, 21 Nov 2023 19:28:45 -0500
The summary is that if you use one of the MH-E limit commands, normally
bound under / in MH-E folder mode, and you attempt to limit (narrow) to
something that isn't present, MH-E doesn't handle the situation properly
and winds up with a narrowed list of folder contents displaying nothing
useful instead of reporting that no messages matched.
To reproduce this, you will need NMH and MH-E configured. Then:
* Enter MH-E, for example with 'M-x mh-rmail'.
* widen the display to cover your entire inbox, '/ w'.
* search for something that is not present: 'C-u / s', and change the
subject to search for to, for example, 'nosuchsubjectstring'.
When you do this, MH-E will first show an error message in a buffer
below the folder window and then narrow the main folder window to a
single line showing 'scan: no messages match specification'. ('/ w' will
then fix the situation.)
When this happens, my *MH-E Log* buffer shows (without the leading
indent):
Errors when executing: mark +inbox -add -sequence header 0 0
mark: no messages match specification
The NMH commands MH-E has run (for me) are:
/usr/bin/mh/pick +inbox 1-382 -list -subject nosuchsubjectstring
/usr/bin/mh/mark +inbox -add -sequence header 0 0
The output from this pick command if run by hand *without standard
output being a tty* are:
$ pick +inbox 1-382 -list -subject nosuchsubjectstring | cat
pick: no messages match specification
0
The potentially surprising '0' is documented in the current NMH pick
manual page in "Output when no messages are matched". In brief, with
-list and standard output not being a tty, pick deliberately outputs as
'0' to standard output to signal error.
I believe the code problem is in mh-narrow-to-header-field in
mh-limit.el, where it processes pick output using 'string-to-number' on
each line and then pushes the nominal resulting number on to the
msg-list list with:
(when num (push num msg-list))
I think that there are two problems with this code. The first is that
string-to-number doesn't return nil on non-numbers, it returns 0. The
second is that sometimes a real '0' is present, but should not be pushed
into the message list either. The two together explain why mark was
invoked with the odd '0 0'; one is from the pick error line and one is
from the actual '0' it output.
I am using the version of NMH packaged with Ubuntu 22.04, which is
listed as NMH 1.7.1. My Emacs is a locally compiled 29.1.
NOTE: This reproduces in 'emacs -Q', but this report is submitted from
inside my regular Emacs environment because life is too short. You can
ignore the list of third party packages, load-path shadows, and other
things.
In GNU Emacs 29.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.33,
cairo version 1.16.0) of 2023-10-30 built on comps3
Windowing system distributor 'The X.Org Foundation', version 11.0.12014000
System Description: Ubuntu 22.04.3 LTS
Configured using:
'configure --prefix /u/cks/lib/x64-linux/emacs-29.1 --without-gsettings
--with-x --with-x-toolkit=gtk3 --with-json --with-tree-sitter
--with-native-compilation=aot'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM HARFBUZZ JPEG JSON LCMS2
LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB
Important settings:
value of $LC_COLLATE: C
value of $LC_CTYPE: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
Minor modes in effect:
smartparens-mode: t
global-corfu-mode: t
corfu-mode: t
marginalia-mode: t
vertico-mouse-mode: t
vertico-multiform-mode: t
vertico-mode: t
which-key-mode: t
global-flycheck-mode: t
flycheck-mode: t
backward-forward-mode: t
override-global-mode: t
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
/u/cks/.emacs.d/elpa/transient-20231121.1154/transient hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/transient
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package-core hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-core
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package-diminish hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-diminish
/u/cks/.emacs.d/elpa/bind-key-20230203.2004/bind-key hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/bind-key
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package-lint hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-lint
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package-jump hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-jump
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package-delight hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-delight
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package-bind-key hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-bind-key
/u/cks/.emacs.d/elpa/use-package-20230426.2324/use-package-ensure hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-ensure
/u/cks/.emacs.d/elpa/project-0.10.0/project hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/progmodes/project
/u/cks/.emacs.d/elpa/seq-2.24/seq hides /u/cks/lib/x64-linux/emacs-29.1/share/emacs/29.1/lisp/emacs-lisp/seq
Features:
(shadow mh-identity mh-letter emacsbug mule-util mh-limit shr-color
color textsec uni-scripts idna-mapping ucs-normalize uni-confusable
textsec-check mm-archive mail-extr mh-seq mh-inc hl-line mh-tool-bar
flyspell ispell mh-xface mh-cks mh-cks-speed mh-speed speedbar ezimage
dframe gnus-icalendar org-capture org-refile org ob ob-tangle ob-ref
ob-lob ob-table ob-exp org-macro org-src ob-comint org-pcomplete
pcomplete comint ansi-osc ring org-list org-footnote org-faces
org-entities noutline outline ob-emacs-lisp ob-core ob-eval org-cycle
org-table ol org-fold org-fold-core org-keys oc org-loaddefs org-version
org-compat org-macs format-spec icalendar diary-lib diary-loaddefs
cal-menu calendar cal-loaddefs mh-utils mh-mime mh-acros mh-show
gnus-cite gnus-art mm-uu mml2015 gnus-sum shr pixel-fill kinsoku
url-file svg dom gnus-group gnus-undo gnus-start gnus-dbus dbus xml
gnus-cloud nnimap nnmail mail-source utf7 nnoo parse-time iso8601
gnus-spec gnus-int message yank-media dired dired-loaddefs rfc822
mailabbrev gmm-utils mailheader gnus-win gnus-range gnus nnheader range
wid-edit mh-comp sendmail mail-utils mh-gnus mml mm-view mml-smime
mml-sec epa derived epg rfc6068 epg-config smime gnutls puny dig
mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mh-folder which-func imenu gnus-util
text-property-search time-date mh-scan mh-e mh-buffers mh-loaddefs
goto-addr comp comp-cstr warnings icons smartparens advice loadhist
thingatpt .emacs corfu marginalia vertico-mouse vertico-multiform
vertico compat which-key flycheck ansi-color find-func rx dash
backward-forward edmacro kmacro cl-extra help-mode pp diminish
use-package use-package-ensure use-package-delight use-package-diminish
use-package-bind-key bind-key easy-mmode use-package-core finder-inf
company-autoloads consult-flycheck-autoloads consult-flyspell-autoloads
consult-lsp-autoloads corfu-autoloads embark-consult-autoloads
consult-autoloads embark-autoloads evil-autoloads
expand-region-autoloads flycheck-golangci-lint-autoloads
flycheck-autoloads fold-this-autoloads go-mode-autoloads
goto-chg-autoloads lsp-ui-autoloads lsp-mode-autoloads magit-autoloads
pcase git-commit-autoloads magit-section-autoloads marginalia-autoloads
orderless-autoloads project-autoloads markdown-mode-autoloads
f-autoloads rust-mode-autoloads smartparens-autoloads
transient-autoloads try-autoloads vertico-autoloads vundo-autoloads
which-key-autoloads with-editor-autoloads info compat-autoloads
seq-autoloads yaml-mode-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 font-render-setting cairo
move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process
native-compile emacs)
Memory information:
((conses 16 677360 268275)
(symbols 48 32601 280)
(strings 32 175807 52415)
(string-bytes 1 5114423)
(vectors 16 78133)
(vector-slots 8 1328934 545011)
(floats 8 474 1371)
(intervals 56 853 260)
(buffers 984 19))
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Copyright (C) 1999 Darren O. Benham,
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1994-97 Ian Jackson.