Jruby-complete.jar compiled with Java 5?

I get the feeling that jruby-complete.jar is compiled with Java 6,
because I
get this error:

Error: Some library (perhaps JRuby) was built with a later JVM version.
Please use libraries built with the version you intend to use or an

Specify -w for full UnsupportedClassVersionError stack trace

(I’ve tried the -w, but it doesn’t seem to work.)

Is there a copy of jruby-complete.jar available anywhere for Java 5?


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