Thread#wakeup doesn't wake up a sleeping thread
-----------------------------------------------

                 Key: JRUBY-3176
                 URL: http://jira.codehaus.org/browse/JRUBY-3176
             Project: JRuby
          Issue Type: Bug
    Affects Versions: JRuby 1.1.5
         Environment: OS X 10.5
            Reporter: Dirkjan Bussink
            Assignee: Thomas E Enebo


Thread#wakeup doesn't wakeup a sleeping thread. This issue is shown by the 
following script:

t = Thread.new do
  puts "It's: #{Time.now}"
  sleep(10)
  puts "It's: #{Time.now}"
end
sleep(4)
t.wakeup
t.join

On MRI, this will output:
It's: Sat Nov 22 16:11:16 +0100 2008
It's: Sat Nov 22 16:11:20 +0100 2008

On JRuby 1.1.5 this will output:
It's: Sat Nov 22 16:11:43 +0100 2008
It's: Sat Nov 22 16:11:54 +0100 2008


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