class Rake::ThreadPool

def join
  @threads_mon.synchronize do
    begin
        @join_cond.wait unless @threads.empty?
    rescue Exception => e
      $stderr.puts e
      $stderr.print "Queue contains #{@queue.size} items. Thread pool contains #{@threads.count} threads\n"
      $stderr.print "Current Thread #{Thread.current} status = #{Thread.current.status}\n"
      $stderr.puts e.backtrace.join("\n")
      @threads.each do |t|
        $stderr.print "Thread #{t} status = #{t.status}\n"
        $stderr.puts t.backtrace.join("\n") if t.respond_to? :backtrace
      end
      raise e
    end
  end
end