GNU bug report logs - #41817
28.0.50; defconst lacks a safety net

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Package: emacs;

Reported by: Stephen Berman <stephen.berman <at> gmx.net>

Date: Thu, 11 Jun 2020 21:11:02 UTC

Severity: normal

Found in version 28.0.50

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stephen Berman <stephen.berman <at> gmx.net>
Subject: bug#41817: closed (Re: bug#41817: 28.0.50; defconst lacks a
 safety net)
Date: Sat, 20 Jun 2020 08:08:02 +0000
[Message part 1 (text/plain, inline)]
Your bug report

#41817: 28.0.50; defconst lacks a safety net

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 41817 <at> debbugs.gnu.org.

-- 
41817: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=41817
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems
[Message part 2 (message/rfc822, inline)]
From: Eli Zaretskii <eliz <at> gnu.org>
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: 41817-done <at> debbugs.gnu.org
Subject: Re: bug#41817: 28.0.50; defconst lacks a safety net
Date: Sat, 20 Jun 2020 11:07:15 +0300
> From: Stephen Berman <stephen.berman <at> gmx.net>
> Date: Thu, 11 Jun 2020 23:10:07 +0200
> 
> 0. emacs -Q
> 1. In *scratch* type: (defvar 'bla "bla") C-j
> => Debugger entered--Lisp error: (wrong-type-argument symbolp 'bla)
> 2. In *scratch* type: (defconst 'bla "bla") C-j
> => 🤯
> Thread 1 "emacs" received signal SIGSEGV, Segmentation fault.
> Finternal__define_uninitialized_variable (symbol=symbol <at> entry=0x14ee4f3, 
>     doc=0x0) at /home/steve/src/emacs/emacs-master/src/lisp.h:1010
> 
> diff --git a/src/eval.c b/src/eval.c
> index 959adea646..171d0644cc 100644
> --- a/src/eval.c
> +++ b/src/eval.c

Thanks, installed on the emacs-27 branch.

[Message part 3 (message/rfc822, inline)]
From: Stephen Berman <stephen.berman <at> gmx.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; defconst lacks a safety net
Date: Thu, 11 Jun 2020 23:10:07 +0200
0. emacs -Q
1. In *scratch* type: (defvar 'bla "bla") C-j
=> Debugger entered--Lisp error: (wrong-type-argument symbolp 'bla)
2. In *scratch* type: (defconst 'bla "bla") C-j
=> 🤯
Thread 1 "emacs" received signal SIGSEGV, Segmentation fault.
Finternal__define_uninitialized_variable (symbol=symbol <at> entry=0x14ee4f3, 
    doc=0x0) at /home/steve/src/emacs/emacs-master/src/lisp.h:1010

diff --git a/src/eval.c b/src/eval.c
index 959adea646..171d0644cc 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -831,6 +831,8 @@ DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0,
   Lisp_Object sym, tem;
 
   sym = XCAR (args);
+  CHECK_SYMBOL (sym);
+
   Lisp_Object docstring = Qnil;
   if (!NILP (XCDR (XCDR (args))))
     {


In GNU Emacs 28.0.50 (build 7, x86_64-pc-linux-gnu, GTK+ Version 3.24.17, cairo version 1.17.3)
 of 2020-06-11 built on strobe-jhalfs
Repository revision: d8a6d2e4810a4072cabbf76170dc4bf708f27d10
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Linux From Scratch SVN-20200401

Configured using:
 'configure 'CFLAGS=-Og -g3' PKG_CONFIG_PATH=/opt/qt5/lib/pkgconfig'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD PDUMPER LCMS2 GMP

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



This bug report was last modified 5 years and 2 days ago.

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