The error occurs during the bootstrap phase of an application I have been developing. In JRuby 1.6.7, there are no errors and the application is able to launch successfully. No changes to the code have been made between tests.
Some minor digging found that the NameError is raised when JRuby attempts to evaluate the line "require 'jruby'", called at the top of the initial script.
The included attachment uses the same command line information to execute as the JRuby 1.6.7 test, and contains verbose output.
The full command is:
jruby.bat -v -Ilib/ -J-Djruby.thread.pooling=true --fast --server --1.9 lib/gryphon.rb