popen3 doesn't work on Windows #3075
Description
popen3 gets the following error on Windows.
$ jruby --version
jruby 9.0.0.0.rc1 (2.2.2) 2015-06-10 a0bf3b3 Java HotSpot(TM) Client VM 25.45-b02 on 1.8.0_45-b14 +jit [Windows 7-x86]
$jruby -r open3 -d -e 'Open3.popen3("notepad")'
io/console not supported; tty will not be manipulated
NotImplementedError: waitpid unsupported or native support failed to load
On jruby 1.7.x popen3 is implemented in RubyIO.java, and it works well.
Is there any way to use popen3 of RubyIO.java on jruby 9.0.0.0.rc1?