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bug#25166: 26.0.50; It shouldn't be possible to set the function cell of
From: |
Philipp |
Subject: |
bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t |
Date: |
Sun, 11 Dec 2016 10:41:13 +0100 |
You can set the function cell of nil and t using `fset' and friends.
But you can't call the `nil' function using (nil) (it does work with
(t)). I think that attempting to set the function cell of nil and t is
almost always a bug -- probably the programmer wanted to set a real
symbol, but some of the constants got passed. I propose to signal an
error (e.g. `setting-constant') whenever the function cell of nil and t
is modified; maybe the same should happen for keywords.
In GNU Emacs 26.0.50.5 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.8)
of 2016-12-10 built on localhost
Repository revision: dc62ea38e36b5de47893a60a76d66b7a79bf6437
Windowing system distributor 'The X.Org Foundation', version 11.0.11702000
System Description: Ubuntu 14.04 LTS
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Configured using:
'configure --enable-checking --enable-check-lisp-object-type
'CFLAGS=-O0 -ggdb3''
Configured features:
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TOOLKIT_SCROLL_BARS GTK3 X11
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
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
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line-number-mode: t
transient-mark-mode: t
Load-path shadows:
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backquote inotify dynamic-setting system-font-setting
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make-network-process emacs)
Memory information:
((conses 16 97085 5586)
(symbols 48 20041 0)
(miscs 40 331 105)
(strings 32 17859 3593)
(string-bytes 1 580498)
(vectors 16 13985)
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- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t,
Philipp <=
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Glenn Morris, 2016/12/11
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Glenn Morris, 2016/12/12
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Philipp Stephani, 2016/12/26
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Philipp Stephani, 2016/12/26
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Eli Zaretskii, 2016/12/26
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Stefan Monnier, 2016/12/27
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Eli Zaretskii, 2016/12/27
- bug#25166: 26.0.50; It shouldn't be possible to set the function cell of nil and t, Stefan Monnier, 2016/12/27