GNU bug report logs - #43549
28.0.50; json-encode-string: Text is read-only

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 43549 in the body.
You can then email your comments to 43549 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

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

From: Sam Steingold <sds <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; json-encode-string: Text is read-only
Date: Mon, 21 Sep 2020 11:28:42 -0400

Evaluate the following in the *scratch* buffer of emacs -Q:

--8<---------------cut here---------------start------------->8---
(require 'json)
(setq s "asdf")
(put-text-property 1 2  'read-only t s)
(let ((json--long-string-threshold 0))
  (json-encode-string s))
--8<---------------cut here---------------end--------------->8---

the result is an error message

json-encode-string: Text is read-only


binding json--long-string-threshold to 0 merely disables an
optimization; another way to trigger an error is to start with a longer string.


In GNU Emacs 28.0.50 (build 2, x86_64-apple-darwin19.6.0, NS appkit-1894.60 Version 10.15.6 (Build 19G2021))
 of 2020-09-21 built on BZ-C02XR5CGJG5L
Repository revision: d5d642eb71d8228d5a408a3d43ca1f4a5b500b9d
Repository branch: master
Windowing system distributor 'Apple', version 10.3.1894
System Description:  Mac OS X 10.15.6

Configured using:
 'configure --with-imagemagick --with-mailutils --with-ns
 PKG_CONFIG_PATH=/usr/local/opt/libxml2/lib/pkgconfig:/usr/local/opt/imagemagick/lib/pkgconfig:/usr/local/opt/gnutls/lib/pkgconfig:/usr/local/opt/jansson/lib/pkgconfig:/usr/local/opt/libtiff/lib/pkgconfig:/usr/local/opt/libpng/lib/pkgconfig:/usr/local/opt/libjpeg/lib/pkgconfig:/usr/local/opt/freetype/lib/pkgconfig'

Configured features:
JPEG TIFF PNG IMAGEMAGICK NOTIFY KQUEUE ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS NS MODULES THREADS JSON PDUMPER LCMS2

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

Major mode: Messages

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
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
rfc822 mml mml-sec epa derived epg epg-config gnus-util rmail
rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache text-property-search mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils time-date json
subr-x map seq byte-opt gv bytecomp byte-compile cconv help-fns
radix-tree cl-print debug backtrace help-mode easymenu find-func
cl-loaddefs cl-lib tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/ns-win ns-win ucs-normalize mule-util
term/common-win 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 kqueue cocoa ns lcms2
multi-tty make-network-process emacs)

Memory information:
((conses 16 57583 6582)
 (symbols 48 7020 1)
 (strings 32 19982 1439)
 (string-bytes 1 653249)
 (vectors 16 12263)
 (vector-slots 8 170307 9852)
 (floats 8 29 99)
 (intervals 56 278 3)
 (buffers 992 14))

-- 
Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1894
http://childpsy.net http://calmchildstories.com http://steingoldpsychology.com
http://islamexposedonline.com https://jihadwatch.org https://jij.org
The Politically Correct term for Censorship is Political Correctness.

Message #8 received at 43549 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Sam Steingold <sds <at> gnu.org>
Cc: 43549 <at> debbugs.gnu.org
Subject: Re: bug#43549: 28.0.50; json-encode-string: Text is read-only
Date: Tue, 22 Sep 2020 17:10:42 +0200

Sam Steingold <sds <at> gnu.org> writes:

> Evaluate the following in the *scratch* buffer of emacs -Q:
>
> (require 'json)
> (setq s "asdf")
> (put-text-property 1 2  'read-only t s)
> (let ((json--long-string-threshold 0))
>   (json-encode-string s))
>
> the result is an error message
>
> json-encode-string: Text is read-only

It looks like you fixed this problem on the trunk already?  So I'm
closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.