jruby fails to report process exit status correctly

JRuby seems to give 0 as process exit status even if it wasn't. Try this:

C:\>jruby -e "system('ruby -e \"exit(2)\"');print $?>>8"
0

This is a jruby issue, since

C:\>ruby -e "system('ruby -e \"exit(2)\"');print $?>>8"
2

As a minor detail, jruby seems to be a little smarter when finding stuff to execute:

C:\>ruby -e "system('jruby -e \"exit(2)\"');print $?>>8"
-e:1: undefined method `>>' for nil:NilClass (NoMethodError)

i.e. "jruby" executable could not be found. However:

C:\>ruby -e "system('jruby.bat -e \"exit(2)\"');print $?>>8"
2

And jruby seems to be smart enough to find the .bat file even w/out the suffix:

C:\>jruby -e "system('jruby -e \"exit(2)\"');print $?>>8"
0