JRUBY_OPTS gives misleading warning #3620
Description
Either I don't understand how JRUBY_OPTS is supposed to work, or it gives misleading warnings:
$ JRUBY_OPTS='-J-ea' bin/jruby -e 1
warning: -J-ea argument ignored (launched in same VM?)
We haven't launched a sub-JRuby there, and I think the argument isn't ignored:
$ JRUBY_OPTS='-J-version' bin/jruby -e 1
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)