$ ./bin/jruby -S rake spec:profiler
/Users/../jruby/bin/jruby --profile --1.8 -S rspec spec/profiler/graph_profile_printer_spec.rb spec/profiler/json_profile_printer_spec.rb spec/profiler/profile_data_spec.rb spec/profiler/profiler_basics_spec.rb spec/profiler/runtime_spec.rb
Profiling enabled; ^C shutdown will now dump profile info
Ignoring jruby-launcher-1.0.19-java because its extensions are not built.  Try: gem pristine jruby-launcher --version 1.0.19
....................................FProfiling enabled; ^C shutdown will now dump profile info
Ignoring jruby-launcher-1.0.19-java because its extensions are not built.  Try: gem pristine jruby-launcher --version 1.0.19
spec not passed, output:
...........

Finished in 0.122 seconds
11 examples, 0 failures


Failures:

  1) JRuby's profiling mode reports unimplemneted methods like fork as unimplemented
     Failure/Error: Kernel.respond_to?(:fork).should == false
       expected: false
            got: true (using ==)
     # ./spec/profiler/profiler_basics_spec.rb:8:in `(root)'

Finished in 2.62 seconds
38 examples, 1 failure

Failed examples:

rspec ./spec/profiler/profiler_basics_spec.rb:7 # JRuby's profiling mode reports unimplemneted methods like fork as unimplemented
RSpec::Expectations::ExpectationNotMetError: expected: "true"
     got: "0" (using ==)
                at :1
                at :1
           call at org/jruby/RubyProc.java:292
  instance_eval at org/jruby/RubyKernel.java:2163
        collect at org/jruby/RubyArray.java:2400
        collect at org/jruby/RubyArray.java:2400
        collect at org/jruby/RubyArray.java:2400
           call at org/jruby/RubyProc.java:292
           call at org/jruby/RubyProc.java:230

main profile results:
Total time: 0.00

     total        self    children       calls  method
----------------------------------------------------------------
      0.00        0.00        0.00           1  ProfilerTest#start
      0.00        0.00        0.00           1  JRuby::Profiler.start
      0.00        0.00        0.00           1  JRuby::Profiler.clear
      0.00        0.00        0.00           1  JRuby::Profiler.current_thread_context
      0.00        0.00        0.00           1  JRuby::Profiler.runtime
      0.00        0.00        0.00           1  JRuby.runtime
      0.00        0.00        0.00           1  ProfilerTest#test_instance_method
      0.00        0.00        0.00           2  Java::OrgJruby::RubyBasicObject#getRuntime
      0.00        0.00        0.00           1  ProfilerTest.test_static_method
      0.00        0.00        0.00           2  Java::OrgJrubyInternalRuntime::ThreadService#getCurrentContext
      0.00        0.00        0.00           2  Java::OrgJruby::Ruby#getThreadService
      0.00        0.00        0.00           1  JRuby.reference0
      0.00        0.00        0.00           1  Fixnum#+
/Users/.../jruby/bin/jruby --profile --1.8 -S rspec spec/profiler/graph_profile_printer_spec.rb spec/profiler/json_profile_printer_spec.rb spec/profiler/profile_data_spec.rb spec/profiler/profiler_basics_spec.rb spec/profiler/runtime_spec.rb failed