Garbage Collector Hang Repro

gistfile1.txt

  Thread.new do  
    while true
      sleep 10
      puts "heartbeat"
    end
  end
    
  while true 
    ar = []
    100.times do
      thr = Thread.new do
        while true
          sleep 1
        end
      end
      ar.push(thr)
    end
    puts ar.length
    ar.each do |thr|
      thr.kill
    end
  end