rubinius

$queue = []

def produce
  $queue << true if rand(10) < 5
end

loop do
  produce
  while client = $queue.shift do
    Thread.new(client) do |c|
      raise "bug" if c == false
    end
    puts Thread.list.size
  end
end

3
4
3^C

An error has occured: Bus violation (SIGBUS) (10)

Ruby backtrace:
  0x3355b4 <none>#<block>+18 in kernel/core/signal.rb:54
  0x335614 <none>#<block>+22 in kernel/core/thread.rb:60

VM Registers:
IP: 0018
SP: -001
Exception: none