JSON::Ext reproduction

In order to run the script with the 1.7.x version of JRuby, use ./gradlew spec.

In order to run it with the 9000 preview1, use: JRUBY=9k ./gradlew spec

Example:

➜  json-9kp1-bug git:(master) ✗ ./gradlew spec
:spec
.

Finished in 0.011 seconds (files took 1.41 seconds to load)
1 example, 0 failures

BUILD SUCCESSFUL

Total time: 8.327 secs
➜  json-9kp1-bug git:(master) ✗ JRUBY=9k ./gradlew spec
:spec
NameError: uninitialized constant JSON::Ext::Parser
    const_missing at org/jruby/RubyModule.java:2935
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/json-1.8.2-java/lib/json/ext.rb:16
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/json-1.8.2-java/lib/json.rb:1
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/json-1.8.2-java/lib/json.rb:58
          require at org/jruby/RubyKernel.java:954
       __script__ at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:69
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/activesupport-4.2.0/lib/active_support/json/decoding.rb:1
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/activesupport-4.2.0/lib/active_support/json/decoding.rb:3
          require at org/jruby/RubyKernel.java:954
       __script__ at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:69
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/activesupport-4.2.0/lib/active_support/json.rb:1
          require at org/jruby/RubyKernel.java:954
       __script__ at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:69
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/activesupport-4.2.0/lib/active_support/json.rb:1
          require at org/jruby/RubyKernel.java:954
       __script__ at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:128
           (root) at /home/tyler/source/github/json-9kp1-bug/spec/some_spec.rb:1
             load at org/jruby/RubyKernel.java:969
           (root) at /home/tyler/source/github/json-9kp1-bug/spec/some_spec.rb:2
             each at org/jruby/RubyArray.java:1569
           (root) at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1
  load_spec_files at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105
  load_spec_files at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105
            setup at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:96
              run at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:84
              run at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:69
             load at org/jruby/RubyKernel.java:969
       __script__ at /home/tyler/source/github/json-9kp1-bug/build/tmp/jrubyExec/bin/rspec:23
:spec FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':spec'.
> Process 'command '/home/tyler/scratch/tools/jdk1.8.0_25/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 8.752 secs
➜  json-9kp1-bug git:(master) ✗