Environment

Windows 7, 64 bit
Jruby 9.1.2.0
Java 1.8.0_91-b14

Expected Behavior

Running the following program

require 'open3'

Open3.popen3("c:/Windows/System32/whoami.exe", "/?") { |i, o, e| }

This should complete without exception.

Actual Behavior

The program fails with an exception:

NotImplementedError: waitpid unsupported or native support failed to load; see http://wiki.jruby.org/Native-Libraries