--- Begin Message ---
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Subject: |
28.0.50; Emacs should print a backtrace on uncaught errors in batch mode |
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Date: |
Sun, 29 Nov 2020 11:47:45 +0100 |
$ emacs -Q -batch -eval '(progn (defun foo () (error "Boo")) (foo))'
Boo
Emacs should print a backtrace here to make it possible to debug such
errors. It's possible to force Emacs to print a backtrace by binding
`debug-on-error', however, that is incorrect because it changes the
meaning of `with-demoted-errors' and `condition-case-unless-debug',
causing code that would normally work to fail with an error. Instead,
`signal' should print a backtrace if in batch mode and if it jumps to
the top-level error handler. It looks like this logic could be
special-cased in signal_or_quit, similar to the debugger logic.
In GNU Emacs 28.0.50 (build 138, x86_64-pc-linux-gnu, GTK+ Version 3.24.22,
cairo version 1.16.0)
of 2020-11-28
Repository revision: a7825c4be06b7c0b544df34555ecf586276245e6
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux rodete
Configured using:
'configure --enable-gcc-warnings=warn-only
--enable-gtk-deprecation-warnings --without-pop --with-mailutils
--enable-checking=all --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 LIBSYSTEMD JSON PDUMPER
Important settings:
value of $LANG: en_US.utf8
value of $XMODIFIERS: @im=ibus
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 rfc822
mml easymenu mml-sec epa epg epg-config gnus-util rmail rmail-loaddefs
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 url-proxy url-privacy url-expand url-methods url-history
url-cookie url-domsuf url-util url-parse auth-source cl-seq eieio
eieio-core cl-macs eieio-loaddefs password-cache json map url-vars
mailcap rx gnutls puny dbus xml subr-x seq byte-opt gv bytecomp
byte-compile cconv compile text-property-search comint ansi-color ring
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 button loaddefs faces cus-face macroexp files
window 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 69693 6335)
(symbols 48 8576 1)
(strings 32 24393 1275)
(string-bytes 1 790267)
(vectors 16 13891)
(vector-slots 8 188843 5960)
(floats 8 26 30)
(intervals 56 212 0)
(buffers 984 11))
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--- Begin Message ---
|
Subject: |
Re: bug#44942: 28.0.50; Emacs should print a backtrace on uncaught errors in batch mode |
|
Date: |
Sun, 6 Dec 2020 17:50:17 +0100 |
Am So., 29. Nov. 2020 um 16:27 Uhr schrieb Philipp Stephani
<p.stephani2@gmail.com>:
>
> Am So., 29. Nov. 2020 um 11:48 Uhr schrieb Philipp Stephani
> <p.stephani2@gmail.com>:
> >
> >
> > $ emacs -Q -batch -eval '(progn (defun foo () (error "Boo")) (foo))'
> > Boo
> >
> > Emacs should print a backtrace here to make it possible to debug such
> > errors. It's possible to force Emacs to print a backtrace by binding
> > `debug-on-error', however, that is incorrect because it changes the
> > meaning of `with-demoted-errors' and `condition-case-unless-debug',
> > causing code that would normally work to fail with an error. Instead,
> > `signal' should print a backtrace if in batch mode and if it jumps to
> > the top-level error handler. It looks like this logic could be
> > special-cased in signal_or_quit, similar to the debugger logic.
> >
>
>
> I've attached a patch.
Pushed to master as commit 40e11743ca.
--- End Message ---