rails: Component 'json' of Ruby on Rails not working with Ruby 2.4.0

Install Ruby 2.4.0 In projects with RoR 3.2.xx, 4.2.xxx bundle install is fail:

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory: /home/ruby/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/json-1.8.3/ext/json/ext/generator

/home/ruby/.rbenv/versions/2.4.0/bin/ruby -r ./siteconf20161225-17221-ivjmjg.rb extconf.rb creating Makefile

current directory: /home/ruby/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/json-1.8.3/ext/json/ext/generator make “DESTDIR=” clean

current directory: /home/ruby/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/json-1.8.3/ext/json/ext/generator make “DESTDIR=” compiling generator.c generator.c: In function ‘generate_json’: generator.c:861:25: error: ‘rb_cFixnum’ undeclared (first use in this function) } else if (klass == rb_cFixnum) { ^ generator.c:861:25: note: each undeclared identifier is reported only once for each function it appears in generator.c:863:25: error: ‘rb_cBignum’ undeclared (first use in this function) } else if (klass == rb_cBignum) { ^ generator.c: At top level: cc1: warning: unrecognized command line option “-Wno-self-assign” cc1: warning: unrecognized command line option “-Wno-constant-logical-operand” cc1: warning: unrecognized command line option “-Wno-parentheses-equality” cc1: warning: unrecognized command line option “-Wno-tautological-compare” Makefile:241: ошибка выполнения рецепта для цели «generator.o» make: *** [generator.o] Ошибка 1

make failed, exit code 2

Gem files will remain installed in /home/ruby/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/json-1.8.3 for inspection. Results logged to /home/ruby/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/extensions/x86_64-linux/2.4.0-static/json-1.8.3/gem_make.out

An error occurred while installing json (1.8.3), and Bundler cannot continue. Make sure that gem install json -v '1.8.3' succeeds before bundling.

About this issue

Original URL
State: closed
Created 8 years ago
Reactions: 30
Comments: 17 (4 by maintainers)

Commits related to this issue

update json gem to support ruby 2.4 See https://github.com/rails/rails/issues/27450 — committed to crest-cassia/oacis by yohm 7 years ago
Update Gemfile for json 1.8.6 Version 1.8.3 had an error and was not compiling on macOS. See https://github.com/rails/rails/issues/27450 — committed to wmde/fundraising-browsertests by gbirke 7 years ago
Gemfile: update json gem to 1.8.6 so it can compile with Ruby 2.4 See thread here: https://github.com/rails/rails/issues/27450 — committed to hlian/mixtapes by hlian 7 years ago
update rails for ruby 2.4 per https://github.com/rails/rails/issues/27450 — committed to bjamesvDatica/ruby-example-app by bjamesvDatica 5 years ago
Lock to JSON 1.8.5 https://github.com/rails/rails/issues/27450#issuecomment-272148454 — committed to rrn/acts_as_sourceable by alexdunae 2 years ago

Most upvoted comments

@Drenmi gem json -v 1.8.5 is perfectly support it! On both RoR - 3.2.xx and 4.2.xx Only with gem 'json', github: 'flori/json', branch: 'v1.8' For many projects - is problem edit each Gemfile

Can still easier to fix this dependence in RoR?

+26

Sega100500 on Dec 25, 2016

JSON 1.8.5 is not published to RubyGems.

It has just been published 👍

+16

redox on Jan 12, 2017

It’s also failing for RoR 5.0.1.

+15

rickyc on Dec 28, 2016

Same issue here with gem ‘github-pages’, trying to install json…

Solved my issue by downgrading to ruby 2.3 using this :

`brew install rbenv ruby-build

Add rbenv to bash so that it loads every time you open a terminal echo ‘if which rbenv > /dev/null; then eval “$(rbenv init -)”; fi’ >> ~/.bash_profile source ~/.bash_profile

Install Ruby rbenv install 2.3.3 rbenv global 2.3.3 ruby -v`

from : https://gorails.com/setup/osx/10.12-sierra

+10

z0ph on Dec 29, 2016

Thanks for the helpful comments. Editing Gemfile.lock and changing json’s version from 1.8.3 to 1.8.5 fixed the issue for me. After that I could run bundle install without getting this error.

I got another error of course, but no longer this one. 😆

evanrmurphy on Apr 27, 2020

Solved: I just commented out, in my Gemfile, the offending gem, sdoc (~> 0.4.0) which resolved to 0.4.0 and depended on json (~> 1.8)… and re-run bundle update all right…

VarusSeptimus on Dec 28, 2016

With Rails 5.0.1 & ruby 2.4.0, when doing bundle update (or gem install json -v '1.8.3') : Gem::Ext::BuildError: ERROR: Failed to build gem native extension. [...] error: ‘rb_cFixnum’ undeclared (first use in this function) [...] error: ‘rb_cBignum’ undeclared (first use in this function)

VarusSeptimus on Dec 28, 2016

The JSON gem only supports the Integer unification in Ruby 2.4 starting from 2.0.0, and the Rails dependency is set to ~> 1.8, so you won’t be able to run Rails 4.2 with Ruby 2.4 for now.

Drenmi on Dec 25, 2016

It looks like this commit fixes it so we only have to wait for the next release. https://github.com/rails/rails/commit/47c49242913abbcdb8f798f53324769892d18c97

HarlemSquirrel on Dec 26, 2016

How about RoR 4.2.x.x? Any plans for releasing a fix to support Ruby 2.4 ?

kapso on Dec 27, 2016