Amber before action issue

output

I, [2017-08-04 18:49:23 +0800 #4972]  INFO -- : [Amber 0.1.6] serving application "Test web application." at http://0.0.0.0:3000
I, [2017-08-04 18:49:23 +0800 #4972]  INFO -- : Server started in development.
I, [2017-08-04 18:49:23 +0800 #4972]  INFO -- : Startup Time 00:00:00.0002180
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200  | GET  "/test"  | 188.0µs
Params:

TestController.cr

class TestController < ApplicationController 

  before_action do
    all do
      puts count
    end
  end

  def count
    @count ||= 0
    @count = @count.not_nil! + 1
  end

  def index
    ""
  end
end