GNU bug report logs - #39995
28.0.50; Suboptimal error formatting for missing struct slot

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

From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; Suboptimal error formatting for missing struct slot
Date: Mon, 09 Mar 2020 09:07:40 +0100

The following happens at least in Emacs 27, I haven't checked other
versions.

$ emacs -Q -batch -l backtrace -l cl-lib -l cl-macs -eval '(cl-struct-slot-offset (quote backtrace-frame) (quote foobar))'
struct %S has no slot %S: backtrace-frame, foobar

This is because the error symbol `cl-struct-unknown-slot' has the
message "struct %S has no slot %S", but the error system doesn't use the
message as a format template.  Probably the error message should just be
"struct has no slot" or so.



In GNU Emacs 28.0.50 (build 10, x86_64-pc-linux-gnu, GTK+ Version 3.24.12, cairo version 1.16.0)
 of 2020-02-25
Repository revision: 03c07c88d90b5747456b9d286bace2dd4a713aac
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12004000
System Description: Debian GNU/Linux rodete

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Source file ‘/home/phst/ThirdParty/emacs/master/lisp/emacs-lisp/seq.el’ newer than byte-compiled file; using older file
Source file ‘/home/phst/ThirdParty/emacs/master/lisp/emacs-lisp/bytecomp.el’ newer than byte-compiled file; using older file
Source file ‘/home/phst/ThirdParty/emacs/master/lisp/emacs-lisp/rx.el’ newer than byte-compiled file; using older file

Configured using:
 'configure --enable-gcc-warnings=warn-only
 --enable-gtk-deprecation-warnings --without-pop --with-mailutils
 --enable-checking --enable-check-lisp-object-type --with-modules
 'CFLAGS=-O0 -ggdb3''

Configured features:
XPM JPEG TIFF GIF PNG CAIRO SOUND DBUS GSETTINGS GLIB NOTIFY INOTIFY
LIBSELINUX GNUTLS FREETYPE HARFBUZZ ZLIB TOOLKIT_SCROLL_BARS GTK3 X11
XDBE XIM MODULES THREADS PDUMPER GMP

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-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
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc dired dired-loaddefs
format-spec rfc822 mml easymenu mml-sec epa epg epg-config gnus-util
rmail rmail-loaddefs text-property-search time-date mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils phst skeleton
derived edmacro kmacro pcase ffap thingatpt url-parse auth-source cl-seq
eieio eieio-core cl-macs eieio-loaddefs password-cache json map url-vars
subr-x rx gnutls puny seq byte-opt gv bytecomp byte-compile cconv dbus
xml cl-loaddefs cl-lib tooltip eldoc electric uniquify ediff-hook
vc-hooks lisp-float-type 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 elisp-mode lisp-mode prog-mode register page
tab-bar menu-bar rfn-eshadow isearch timer select scroll-bar mouse
jit-lock font-lock syntax facemenu font-core term/tty-colors frame
minibuffer 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 charscript charprop case-table epa-hook jka-cmpr-hook help
simple abbrev obarray cl-preloaded nadvice loaddefs button faces
cus-face macroexp files text-properties overlay sha1 md5 base64 format
env code-pages mule custom widget hashtable-print-readable backquote
threads dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs)

Memory information:
((conses 16 59559 7872)
 (symbols 48 8079 1)
 (strings 32 20894 1643)
 (string-bytes 1 680112)
 (vectors 16 12053)
 (vector-slots 8 164838 5066)
 (floats 8 26 31)
 (intervals 56 196 0)
 (buffers 1000 11))

Message #12 received at 39995-done <at> debbugs.gnu.org (full text, mbox):

From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: 39995-done <at> debbugs.gnu.org
Subject: Re: bug#39995: 28.0.50; Suboptimal error formatting for missing
 struct slot
Date: Sun, 12 Apr 2020 15:13:23 +0200

Am Mo., 9. März 2020 um 09:09 Uhr schrieb Philipp Stephani
<p.stephani2 <at> gmail.com>:
>
>
> The following happens at least in Emacs 27, I haven't checked other
> versions.
>
> $ emacs -Q -batch -l backtrace -l cl-lib -l cl-macs -eval '(cl-struct-slot-offset (quote backtrace-frame) (quote foobar))'
> struct %S has no slot %S: backtrace-frame, foobar
>
> This is because the error symbol `cl-struct-unknown-slot' has the
> message "struct %S has no slot %S", but the error system doesn't use the
> message as a format template.  Probably the error message should just be
> "struct has no slot" or so.

Fixed with commit 36873ef2b2.

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