GNU bug report logs - #42994
27.1; json-serialize unable to serialize JSON values

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Thomas Hisch <thomas.hisch <at> ims.co.at>
Subject: bug#46486: closed (bug#42994: 27.1; json-serialize unable to
 serialize JSON values)
Date: Sat, 13 Feb 2021 13:41:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#42994: 28.0.50; json-parse-string missing support for key-less json strings

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 46486 <at> debbugs.gnu.org.

-- 
42994: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=42994
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Philipp <p.stephani2 <at> gmail.com>
To: 42994-done <at> debbugs.gnu.org
Subject: bug#42994: 27.1; json-serialize unable to serialize JSON values
Date: Sat, 13 Feb 2021 14:40:18 +0100

I’ve now fixed this with commit 625de7e403.

[Message part 3 (message/rfc822, inline)]

From: Thomas Hisch <thomas.hisch <at> ims.co.at>
To: <bug-gnu-emacs <at> gnu.org>
Subject: 28.0.50; json-parse-string missing support for key-less json strings
Date: Sat, 13 Feb 2021 13:04:09 +0100

The `json-read-from-string' function doesn't support json strings that
only contain a single value, which is neither a list nor a dict, e.g.

"123"

or

"\"abc\""

However, `json-read-from-string' doesn't have this issue:

(require 'json)
(json-read-from-string "\"abc\"")
-> "abc"

(json-parse-string "\"abc\"")
-> progn: could not parse JSON stream: "'[' or '{' expected near '\"abc\"'", "<string>", 1, 5, 5

Note that strings that neither start with [ nor { are valid JSON objects
according to the JSON schema.

Since the docstring of `json-parse-string' mentions `json-serialize' as
essentially being the reverse operation of `json-parse-string', I've
tried to serialize a lisp string:

(json-serialize "abc")
-> progn: Wrong type argument: json-value-p, "abc"

I would also expect this `json-serialize' call to work.



In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw scroll bars)
 of 2021-02-12 built on thomas-XPS-13-9360
Repository revision: db237850abc240e2c3e765e9cc7e15ee5681dcaf
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
System Description: Ubuntu 20.10

Configured using:
 'configure 'CFLAGS=-march=native -O3' --prefix=/opt/emacs
 --with-x-toolkit=lucid --with-xpm --without-jpeg --without-gif
 --without-tiff --with-modules --with-json'

Configured features:
CAIRO DBUS FREETYPE GLIB GMP GNUTLS GSETTINGS HARFBUZZ JSON LIBSELINUX
LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG SOUND THREADS
TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM LUCID ZLIB

Important settings:
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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  mouse-wheel-mode: t
  global-prettify-symbols-mode: t
  prettify-symbols-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
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  hs-minor-mode: t

Load-path shadows:
/home/thomas/.emacs.d/elpa/magit-20210209.1110/magit-section hides /home/thomas/.emacs.d/elpa/magit-section-20210124.1824/magit-section
/home/thomas/.emacs.d/user-lisp/custom hides /opt/emacs/share/emacs/28.0.50/lisp/custom

Features:
(shadow sort mail-extr emacsbug sendmail pulse vc-git cl-print debug
backtrace hippie-exp mule-util magit-bookmark bookmark url-cache
counsel-projectile counsel swiper ivy-rich ivy-hydra ivy ivy-faces
ivy-overlay colir ethan-wspace hideshow url-tramp ims-jira saveplace
ffap paren delsel savehist hi-lock thi-projects winner window-numbering
which-key wgrep-ag vterm-toggle tramp-sh vterm term disp-table ehelp
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prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
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hashtable-print-readable backquote threads dbusbind inotify
dynamic-setting system-font-setting font-render-setting cairo x-toolkit
x multi-tty make-network-process emacs)

Memory information:
((conses 16 860745 303250)
 (symbols 48 75095 48)
 (strings 32 356592 50903)
 (string-bytes 1 8345016)
 (vectors 16 98242)
 (vector-slots 8 2608232 546550)
 (floats 8 587 674)
 (intervals 56 18840 12630)
 (buffers 984 29))
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