```
[] ~/projects/jruby $ jruby -Xjit.logging -Xjit.logging.verbose -Xcompile.cache.classes -X+C -S gem list
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java.class
2020-01-25T13:19:03.080-06:00 [main] INFO Ruby : done compiling target script: uri:classloader:/jruby/java.rb
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java/core_ext.class
2020-01-25T13:19:03.105-06:00 [main] INFO Ruby : done compiling target script: uri:classloader:/jruby/java/core_ext.rb
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java/core_ext/module.class
2020-01-25T13:19:03.174-06:00 [main] INFO Ruby : done compiling target script: uri:classloader:/jruby/java/core_ext/module.rb
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java/core_ext/object.class
2020-01-25T13:19:03.229-06:00 [main] INFO Ruby : done compiling target script: uri:classloader:/jruby/java/core_ext/object.rb
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java/java_ext.class
2020-01-25T13:19:03.234-06:00 [main] INFO Ruby : done compiling target script: uri:classloader:/jruby/java/java_ext.rb
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/jruby_dot_jar/jruby/jruby.class
2020-01-25T13:19:03.284-06:00 [main] INFO Ruby : done compiling target script: file:/Users/headius/projects/jruby/lib/jruby.jar!/jruby/jruby.rb
Unhandled Java exception: java.lang.NullPointerException
java.lang.NullPointerException: null
    newMetaClassFromIR at org/jruby/ir/runtime/IRRuntimeHelpers.java:1442
  newCompiledMetaClass at org/jruby/ir/runtime/IRRuntimeHelpers.java:1431
         openMetaClass at org/jruby/ir/targets/Bootstrap.java:246
         <class:JRuby> at file:/Users/headius/projects/jruby/lib/jruby.jar!/jruby/jruby.rb:2
```