DEBUGGER__.suspend

# File tmp/rubies/ruby-3.0.5/lib/debug.rb, line 954
def suspend
  MUTEX.synchronize do
    make_thread_list
    for th, in @thread_list
      next if th == Thread.current
      context(th).set_suspend
    end
  end
  # Schedule other threads to suspend as soon as possible.
  Thread.pass
end