JRuby 0.9.8 has been released recently. Updated jsr-223 script engine for JRuby @ scripting.dev.java.net to make use of this latest version. Also, fixed a bug in JRuby ScriptEngineFactory's getMethodCallSyntax method. Previously, this method generated code that could not be evaluated. That was because the factory was not generating "$" prefix for Ruby object and arguments. This bug has been fixed.