title: An error occurred while installing json (1.8.1) and Bundler cannot continue
body: <p><strong>when I try to run bundle install , I got the following error:</strong></p>
  <pre><code>Fetching gem metadata from https://rubygems.org/............
  Fetching version metadata from https://rubygems.org/...
  Fetching dependency metadata from https://rubygems.org/..
  Resolving dependencies...
  Using rake 10.3.2
  Using i18n 0.6.9
  Installing json 1.8.1 with native extensions
  Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
  current directory: /home/geethu/.rvm/gems/ruby-2.3.1/gems/json-1.8.1/ext/json/ext/generator/home/geethu/.rvm/rubies/ruby-2.3.1/bin/ruby -r ./siteconf20201013-6347-q8bzg1.rb extconf.rb
  </code></pre>
  <p>creating Makefile
  current directory: /home/geethu/.rvm/gems/ruby-2.3.1/gems/json-1.8.1/ext/json/ext/generator
  make &quot;DESTDIR=&quot; clean
  current directory: /home/geethu/.rvm/gems/ruby-2.3.1/gems/json-1.8.1/ext/json/ext/generator
  make &quot;DESTDIR=&quot;
  compiling generator.c</p>
  <pre><code>../fbuffer/fbuffer.h: In function ‘fbuffer_to_s’:
  </code></pre>
  <p>../fbuffer/fbuffer.h:175:47: error: macro &quot;rb_str_new&quot; requires 2 arguments, but only 1 given
  VALUE result = rb_str_new(FBUFFER_PAIR(fb));</p>
  <pre><code>../fbuffer/fbuffer.h:175:20: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
  </code></pre>
  <p>VALUE result = rb_str_new(FBUFFER_PAIR(fb));</p>
  <pre><code>Makefile:238: recipe for target 'generator.o' failed
  </code></pre>
  <p>make: *** [generator.o] Error 1</p>
  <pre><code>make failed, exit code 2
  Gem files will remain installed in /home/geethu/.rvm/gems/ruby-2.3.1/gems/json-1.8.1 for inspection.
  </code></pre>
  <p>Results logged to /home/geethu/.rvm/gems/ruby-2.3.1/extensions/x86_64-linux/2.3.0/json-1.8.1/gem_make.out</p>
  <pre><code>Using minitest 5.3.4
  Using thread_safe 0.3.4
  Using builder 3.2.2
  Using erubis 2.7.0
  Using rack 1.5.2
  Using mime-types 1.25.1
  Using polyglot 0.3.5
  Using arel 5.0.1.20140414130214
  Using bcrypt 3.1.7
  Using coderay 1.1.0
  Using debug_inspector 0.0.2
  Using bundler 1.12.5
  Using callsite 0.0.11
  Using cancan 1.6.10
  Using coffee-script-source 1.7.0
  Using execjs 2.1.0
  Using thor 0.19.1
  Using currencies 0.4.2
  Using database_cleaner 1.3.0
  Using orm_adapter 0.5.0
  Using diff-lcs 1.2.5
  Using tilt 1.4.1
  Using hike 1.2.3
  Using multi_json 1.10.1
  Using method_source 0.8.2
  Using subexec 0.2.3
  Using mini_portile 0.6.0
  Using mousetrap-rails 1.4.6
  Using nested_form 0.3.2
  Using pg 0.17.1
  Using slop 3.5.0
  Using rolify 3.4.0
  Using rspec-core 2.14.8
  Using rspec-mocks 2.14.6
  Using rubyzip 1.1.3
  Using sass 3.2.19
  Using workflow 1.1.0
  An error occurred while installing json (1.8.1), and Bundler cannot continue.
  </code></pre>
  <p>Make sure that <code>gem install json -v '1.8.1'</code> succeeds before bundling.</p>